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World J Clin Pediatr. Sep 9, 2026; 15(3): 117421
Published online Sep 9, 2026. doi: 10.5409/wjcp.117421
From genes to environment: A life-course approach to prevent pediatric autoimmune diseases
Mohammed Al-Beltagi, Department of Pediatrics, Faculty of Medicine, Tanta University, Tanta 31511, Algharbia, Egypt
Mohammed Al-Beltagi, Department of Paediatrics, University Hospital, Arabian Gulf University, Manama 26671, Manama, Bahrain
Nermin K Saeed, Medical Microbiology Section, Department of Pathology, Department of Pathology, Salmaniya Medical Complex, Governmental Hospitals, Ministry of Health, Manama 12, Bahrain
Nermin K Saeed, Medical Microbiology Section, Department of Pathology, Royal College of Surgeons in Ireland - Medical University of Bahrain, Busaiteen 15503, Muharraq, Bahrain
Adel S Bediwy, Department of Pulmonology, Faculty of Medicine, Tanta University, Tanta 31527, Alghrabia, Egypt
Adel S Bediwy, Department of Pulmonology, University Hospital, Arabian Gulf University‎, Manama 26671, Manama, Bahrain
Eman A Bediwy, Department of Internal Medicine, Faculty of Medicine, Tanta University, Tanta 31527, Algharbia, Egypt
Reem Elbeltagi, Department of Medicine, Royal College of Surgeons in Ireland, Medical University of Bahrain, Busaiteen 15503, Muharraq, Bahrain
ORCID number: Mohammed Al-Beltagi (0000-0002-7761-9536); Nermin K Saeed (0000-0001-7875-8207); Adel S Bediwy (0000-0002-0281-0010); Reem Elbeltagi (0000-0001-9969-5970).
Co-first authors: Mohammed Al-Beltagi and Nermin K Saeed.
Author contributions: Al-Biltagi M conceived the study, served as the corresponding author, and led the manuscript drafting; Al-Biltagi M and Saeed NK contributed equally to this manuscript as co-first authors; Al-Biltagi M, Saeed NK, Bediwy AS, Bediwy EA, and Elbeltagi R contributed to data collection and analysis and participated in drafting and critically revising the manuscript. All authors reviewed and approved the final version of the manuscript and agree to be accountable for all aspects of the work.
AI contribution statement: No part of the manuscript was generated by AI. Only Grammarly was used for minor grammatical corrections and language polishing. No AI tools were involved in the design of the study, data analysis, or interpretation of the results. No images were generated using AI. All figures are original and author-produced.
Conflict-of-interest statement: All the authors report no relevant conflicts of interest for this article.
Corresponding author: Mohammed Al-Beltagi, MBChB, MD, PhD, Full Professor, Senior Researcher, Department of Pediatrics, Faculty of Medicine, Tanta University, 1 Hassan Radwan Street, Tanta 31511, Algharbia, Egypt. mohamed.elbeltagi@med.tanta.edu.eg
Received: December 8, 2025
Revised: December 24, 2025
Accepted: March 17, 2026
Published online: September 9, 2026
Processing time: 236 Days and 1 Hours

Abstract

Autoimmune diseases in children, including type 1 diabetes, celiac disease, and juvenile arthritis, represent a growing global health challenge. This surge, too rapid to be explained by genetic shifts alone, highlights the critical role of environmental factors and underscores the urgent need for proactive prevention. This review presents an integrated, evidence-based framework for preventing pediatric autoimmune diseases across the care spectrum, from primordial to tertiary prevention. We define high-risk pediatric populations using a multidimensional approach that integrates family history, genetic data (e.g., polygenic risk scores), and preclinical biomarkers. The review details a multi-tiered prevention strategy: Primordial prevention focuses on optimizing maternal and early-life health to establish immune tolerance in the first 1000 days; primary prevention targets at-risk children with personalized nutritional and lifestyle interventions; secondary prevention uses early screening and surveillance to identify preclinical autoimmunity, allowing for targeted immunomodulatory therapies that can delay or prevent disease onset; and tertiary prevention employs early aggressive therapy to limit long-term complications in children with established disease. By synthesizing epidemiological data, mechanistic understanding, and a comprehensive prevention framework, this article aims to inform clinical practice, guide research priorities, and support public health policies to combat the increasing incidence of pediatric autoimmunity.

Key Words: Pediatric autoimmunity; Children; Precision prevention; Microbiome; Teplizumab; Immunomodulation; Primary prevention; Exposome

Core Tip: The rising global incidence of pediatric autoimmune diseases necessitates a strategic shift from reactive disease management to proactive prevention. This article outlines a comprehensive, integrated framework that leverages advances in genomics and exposomics to identify and intervene in high-risk children. The model begins with primordial prevention during the first 1000 days, progressing through primary and secondary interventions, and concluding with aggressive therapy for established disease. By adopting this tiered approach, clinicians, researchers, and public health officials can work collaboratively to alter disease trajectories, reduce the long-term burden of these conditions, and ultimately improve the health outcomes for future generations.



INTRODUCTION

Autoimmune diseases in children, such as type 1 diabetes mellitus (T1DM), celiac disease, autoimmune thyroiditis, juvenile idiopathic arthritis (JIA), inflammatory bowel disease (IBD), and systemic lupus erythematosus (SLE), represent a growing global health challenge with a significant public health threat[1]. Over the past few decades, the incidence of these conditions has risen markedly across diverse geographic regions, affecting both developed and developing countries. For example, T1DM incidence is increasing annually by approximately 3%-5% in many populations, while celiac disease prevalence has more than quadrupled in some cohorts[2]. In addition, the prevalence of positive antinuclear antibody (ANA - a common biomarker of autoimmunity) was tripled in adolescents from 1988 to 2012. Similar upward trends are observed for autoimmune thyroiditis, IBD, and juvenile arthritis, contributing to substantial morbidity, healthcare costs, and lifelong treatment burdens in affected children[3]. This surge, occurring too rapidly to be explained by genetic shifts alone, underscores the profound impact of environmental changes and the urgent need for practical, proactive, evidence-based preventive strategies[4]. However, it is essential to critically evaluate the certainty of these epidemiological conclusions. While the upward trajectory of pediatric autoimmunity appears genuine, several confounders may influence the reported magnitude of these trends. Improved diagnostic ascertainment - driven by increased clinical awareness and the broader availability of high-sensitivity biomarkers - along with evolving classification criteria (such as the 'no-biopsy' diagnostic pathway for pediatric celiac disease) likely contribute to the observed surge[5]. Additionally, selection biases in large longitudinal cohort studies, which often focus on high-resource settings or families with a pre-existing history of autoimmunity, may limit the generalizability of these findings. Consequently, the reported ‘surge’ likely reflects a complex combination of genuine biological shifts in the pediatric exposome and improved detection capabilities in modern healthcare systems[6].

The pathophysiology of pediatric autoimmune diseases represents a multi-step “cascade” in which generalized immune dysregulation is funneled into organ-specific pathology by distinct genetic and environmental inputs (Figure 1). While conditions such as T1DM, celiac disease, and IBD share a foundational “primordial” risk - including human leukocyte antigen (HLA)-mediated susceptibility and gut dysbiosis - their clinical trajectories diverge at the point of antigen-specific activation[7]. For instance, whereas T1DM is driven by T-cell-mediated destruction of pancreatic beta cells, often triggered by enteroviral infections, celiac disease is uniquely dependent on dietary gluten as the requisite environmental antigen. This comparative understanding is critical for clinical practice; universal primordial strategies (e.g., breastfeeding, vitamin D sufficiency) aim to stabilize the broader immune regulatory network, while disease-specific secondary prevention [e.g., screening for anti-tissue transglutaminase (tTG) or islet autoantibodies] is required to intercept the specific pathological cascade before irreversible tissue damage occurs[8,9].

Figure 1
Figure 1 Comparative pathophysiological cascades and intervention windows in major pediatric autoimmune diseases. This schematic compares the pathophysiological progression of five major pediatric autoimmune diseases. Shared mechanisms: All conditions share a common foundation of genetic susceptibility (primarily human leukocyte antigen and early-life environmental factors that promote systemic inflammation and gut barrier dysfunction. Disease-specific cascades: The transition to clinical disease is dictated by specific antigens (e.g., gluten in celiac) or infectious triggers (e.g., enteroviruses in type 1 diabetes mellitus) that drive organ-specific immune responses. Prevention rationale: The figure illustrates why primordial prevention (targeting the shared foundation) can be universal, whereas secondary prevention (targeting specific autoantibodies and biomarkers) must be tailored to the individual disease’s unique “immunological signature”. T1DM: Type 1 diabetes mellitus; CD: Celiac disease; AIT: Autoimmune thyroiditis; SLE: Systemic lupus erythematosus; JIA: Juvenile idiopathic arthritis; IA-2: Insulinoma-associated antigen 2; ZnT8: Zinc transporter 8; tTG: Tissue transglutaminase; TPO: Thyroid peroxidase; Tg: Thyroglobulin; Ab: Antibody; ANA: Antinuclear antibody; CCP: Anti-cyclic citrullinated peptide; RF: Rheumatoid factor; HLA: Human leukocyte antigen.

The pathophysiology of pediatric autoimmune diseases reflects a complex interplay between genetic predisposition and environmental influences. Genetic susceptibility is often conferred by specific genetic variants, most notably HLA haplotypes such as HLA-DR3, HLA-DR4, and HLA-DQ2/DQ8, which increase baseline risk. However, possessing these risk genes is not deterministic[10]. The transition from genetic predisposition to clinical disease is heavily modulated by environmental factors. Viral and bacterial infections, gut microbiome disturbances (dysbiosis), early-life dietary exposures (e.g., timing of gluten introduction, cow’s milk proteins), vitamin D deficiency, and environmental toxins, such as endocrine disruptors, can precipitate immune dysregulation in genetically susceptible individuals. This interaction culminates in the loss of self-tolerance, production of autoantibodies, and ultimately, progressive autoimmune-mediated tissue destruction[11].

Emerging evidence underscores the importance of the “first 1000 days” - from conception to a child’s second birthday - as the most critical window for shaping immune tolerance and establishing a balanced gut microbiome (Figure 2). During this period, the infant’s immune system and gut microbiome are co-developing and are exquisitely sensitive to external exposures[12]. The resulting immune system programming is particularly sensitive to maternal health, mode of delivery, breastfeeding, complementary feeding practices, exposure to infections, and antibiotic use. Perturbations in these early-life factors may create a pro-inflammatory state and tilt the immune balance toward autoimmunity, particularly in high-risk children[13]. Thus, targeted interventions during this window hold promise for modifying disease trajectories before the onset of irreversible immune-mediated injury, making it the prime opportunity for preventive interventions[14]. Figure 3 illustrates the link among genetic susceptibility, environmental triggers, and early-life factors, as well as prevention strategies for autoimmune diseases in high-risk children.

Figure 2
Figure 2 The first 1000 days: Critical windows for immune education and autoimmune prevention. This schematic figure maps the temporal sequence of immune system maturation and microbiome colonization from conception through the second year of life. Prenatal phase: Highlights the role of maternal health and nutrition (e.g., vitamin D, omega-3) in epigenetic programming. Birth window: Illustrates the “microbial inoculation” phase, where delivery mode determines the initial pioneer species (e.g., Lactobacillus vs Staphylococcus). 0-6 months: Focuses on the role of human milk oligosaccharides and secretory immunoglobulin A in promoting regulatory T cells expansion. 6-24 months: Depicts the transition to an adult-like microbiome through complementary feeding and the development of oral tolerance. The shaded areas represent “windows of vulnerability” where environmental disruptions (e.g., antibiotics, dysbiosis) may shift the trajectory toward preclinical autoimmunity. Ig: Immunoglobulin.
Figure 3
Figure 3 The link between genetic susceptibility, environmental triggers, and early-life factors to prevention strategies for autoimmune diseases in high-risk children. The figure shows how genetic susceptibility, environmental triggers, and the first 1000 days influence prevention strategies from primordial to tertiary levels. HLA: Human leukocyte antigen.

This review aims to provide an integrated, evidence-based framework for preventing autoimmune diseases in high-risk pediatric populations. Prevention strategies will be examined across the entire care spectrum, from primordial to tertiary prevention. Primordial prevention focuses on upstream societal and environmental factors to reduce exposure to risk elements before disease pathways are triggered. Primary prevention targets at-risk children to prevent the development of autoimmunity through nutritional, microbial, and lifestyle adjustments[15]. Conversely, secondary prevention identifies and manages preclinical autoimmunity to slow or stop disease progression. Additionally, tertiary prevention seeks to minimize complications and disability in children already diagnosed with autoimmune disease[16]. By combining epidemiological data, mechanistic understanding, and prevention strategies across these stages, this article aims to inform clinical practice, guide research priorities, and support public health policies to combat the increasing incidence of pediatric autoimmunity.

DEFINING “HIGH-RISK” PEDIATRIC POPULATIONS

Identifying children at heightened risk for autoimmune disease is the foundational step for targeted prevention, requiring a multi-dimensional approach that integrates genetic, immunological, and environmental data. The most accessible indicator remains family history, as a child with a first-degree relative with an autoimmune condition carries a substantially elevated lifetime risk[17]. This familial clustering is rooted in genetic susceptibility, primarily conferred by specific HLA class II haplotypes that govern antigen presentation to T cells. For instance, the HLA-DR3-DQ2 and DR4-DQ8 haplotypes are powerfully associated with T1DM and celiac disease, while other alleles are linked to JIA and lupus[18]. While essential, genetic predisposition is not deterministic; most individuals who carry high-risk HLA genes never develop clinical disease. This crucial gap underscores the need to look beyond genetics to identify children in whom the autoimmune process has already begun[19].

The transition from genetic predisposition to active disease is best characterized by immune biomarkers that signal a shift toward preclinical autoimmunity. This asymptomatic phase is characterized by the presence of disease-specific autoantibodies in circulation, reflecting a definitive breach of self-tolerance, long before clinical symptoms emerge[20]. In T1DM, the appearance of two or more islet autoantibodies [against glutamic acid decarboxylase 65 (GAD65), islet antigen-2 (IA-2), or insulin, for example] signifies a near-certain progression to overt disease[21]. Similarly, anti-tTG antibodies in celiac disease or antinuclear antibodies (ANA) in lupus serve as powerful predictive markers. Landmark longitudinal studies, such as The Environmental Determinants of Diabetes in the Young, have meticulously mapped this progression, demonstrating that seroconversion is a critical event that dramatically increases an individual’s risk profile and presents a key window for secondary prevention[22].

The most sophisticated and accurate risk stratification is achieved through integrated risk models that combine genetic and biomarker data with a third critical layer: Environmental context. These advanced models often utilize polygenic risk scores (PRS), which aggregate the minor effects of hundreds or thousands of genetic variants (both HLA and non-HLA) into a single, quantitative measure of inherited susceptibility[23]. This genetic score is then layered with biomarker status and data on relevant environmental exposures, such as perinatal factors (e.g., mode of delivery), a history of specific viral infections (e.g., coxsackievirus), dietary patterns, and gut microbiome signatures associated with immune dysregulation[24]. By merging these data streams, a holistic and dynamic risk profile can be constructed, enabling clinicians to stratify children with far greater precision. For example, a child with a high PRS and positive autoantibodies who experiences a known environmental trigger would be classified at the highest tier of risk, justifying enrollment in clinical trials for targeted preventive therapies[25]. This multi-layered, precision-based approach is essential for tailoring the surveillance schedules and interventions discussed in the subsequent sections of this review. Table 1 summarizes the common pediatric autoimmune disorders and their associated genetic and biomarker risk factors.

Table 1 Common autoimmune disorders in children with associated genetic and biomarker risk factors.
Autoimmune disorder
Prevalence/incidence (children)
Typical age of onset
Key genetic risk factors
Biomarker risk (preclinical)
Clinical notes
T1DMIncidence approximately 10-60 per 100000/year (region-dependent)Peaks 4-7 and 10-14 yearsHLA-DR3, HLA-DR4, DR3/DR4; HLA-DQ8; INS, PTPN22, CTLA4≥ 2 islet autoantibodies (IAA, GAD65, IA-2, ZnT8) → high progression riskAutoantibodies may precede the onset by years; a strong family history signal
Celiac diseasePrevalence approximately 0.5%-1.5%After gluten introduction, commonly 1-3 years (but any age)HLA-DQ2 (especially DQ2.5), HLA-DQ8; IL2/IL21, CTLA4Anti-tTG IgA, EMA IgA, DGP antibodiesSerology plus histology (or no-biopsy pathway in select pediatric cases)
Autoimmune thyroid disease (Hashimoto’s/Graves’)Prevalence approximately 1%-2% in adolescents (higher in females)Late childhood to adolescence (8-18 years)HLA-DR3/DR5; CTLA4, PTPN22, FOXP3Anti-TPO, anti-Tg; TRAb in Graves’Presents with hypo- or hyperthyroidism; consider screening in T1DM/celiac
JIAPrevalence approximately 30-200 per 100000; incidence 5-20 per 100000/year< 16 years; peaks 1-3 and 8-12 years (subtype-dependent)HLA-DRB1 “shared epitope” alleles; PTPN22; STAT4; HLA-B27 (ERA subtype)ANA (oligoarticular), RF and anti-CCP (polyarticular)ANA positivity common in oligoarticular JIA; HLA-B27 → enthesitis-related arthritis
Inflammatory bowel disease (Crohn’s, UC)Prevalence approximately 100-300 per 100000; incidence 5-15 per 100000/yearPeak 10-17 years; can occur earlierNOD2/CARD15 (Crohn’s), IL23R, ATG16 L1ASCA (Crohn’s), pANCA (UC)Biomarkers aid differentiation: PANCA (UC) vs ASCA (Crohn’s); growth failure can be presenting sign
Systemic lupus erythematosusPrevalence approximately 3-20 per 100000; incidence approximately 0.3-0.9 per 100000/yearUsually 12-16 years; rare < 5 yearsHLA-DR2/DR3; IRF5, STAT4; complement (C1q/C4) deficiencyANA, anti-dsDNA, anti-Sm; low C3/C4ANA highly sensitive, not specific; anti-dsDNA correlates with activity; multi-organ involvement
Autoimmune hepatitisIncidence approximately 0.3-1 per 100000/year (rare)Bimodal; childhood 7-15 years (types 1 and 2)Corrected: HLA-DRB1*03/04 (type 1), HLA-DRB107/*13 (type 2)ANA, SMA (type 1); anti-LKM1 (type 2)Type 1 ANA/SMA; type 2 anti-LKM1; may present with acute hepatitis or insidious transaminitis
Myasthenia gravis (juvenile)Prevalence approximately 1-5 per 100000; incidence approximately 0.1-0.4 per 100000/yearPeaks in prepubertal (5-10 years, often ocular) and adolescence (10-18 years)HLA-B8, HLA-DR3Anti-AChR antibodies; anti-MuSK antibodies (subset)Fluctuating fatigable weakness; ocular symptoms common initially; thymic abnormalities less frequent than adults
Pediatric-onset multiple sclerosisPrevalence approximately 1-5 per 100000; incidence approximately 0.1-0.3 per 100000/year10-17 years (rare < 10)HLA-DRB1*15:01; IL7RCSF oligoclonal bands; MOG-IgG in MOGAD phenotypeUsually relapsing-remitting; MRI dissemination in time/space; consider EBV seropositivity context
Juvenile dermatomyositisPrevalence 2-4 per 100000; incidence 02-0.5 per 100000/yearPeak 4-10 yearsHLA-DQA105:01, HLA-DRB103Myositis-specific antibodies (e.g., anti-Mi-2, anti-TIF1-γ [p155/140])Symmetric proximal weakness, heliotrope rash, Gottron papules; risk of calcinosis; nailfold capillary changes
PRIMORDIAL PREVENTION: PREVENTING RISK FACTOR EMERGENCE IN THE FIRST 1000 DAYS

Primordial prevention aims to halt the emergence of modifiable risk factors for autoimmunity before they arise, focusing on maternal, perinatal, and early postnatal influences that shape immune tolerance. The “first 1000 days” - spanning conception through the second year of life - represent a critical window during which the immune system, gut microbiome, and metabolic programming are highly plastic and susceptible to environmental shaping[26]. Interventions in this period are particularly impactful in high-risk pediatric populations with a strong genetic predisposition. Figure 4 summarizes evidence-based strategies to reduce the risk of autoimmune diseases in genetically susceptible children by targeting environmental and lifestyle factors from early life[27].

Figure 4
Figure 4 Primordial prevention strategies for autoimmune diseases in high-risk children. This infographic summarizes evidence-based strategies aimed at reducing the risk of autoimmune diseases in genetically susceptible children by targeting environmental and lifestyle factors from early life. Ig: Immunoglobulin; HMO: Human milk oligosaccharides; VOC: Volatile organic compounds.

Prenatal maternal health optimization is the cornerstone of this approach. Adequate intake of micronutrients such as vitamin D, omega-3 fatty acids, and folate during pregnancy supports optimal fetal immune and neural development. Vitamin D sufficiency is associated with a reduced risk of T1DM and other autoimmune conditions in offspring, likely through modulation of T-cell differentiation and reduced production of pro-inflammatory cytokines[28]. Omega-3 fatty acids contribute to the production of anti-inflammatory lipid mediators, while folate is critical for DNA methylation patterns involved in immune tolerance[29]. Maternal avoidance of harmful exposures - including tobacco smoke, alcohol, and endocrine-disrupting chemicals such as bisphenol A (BPA) and phthalates - is equally important, as these agents have been linked to immune dysregulation, altered thymic function, and increased risk of allergic and autoimmune diseases[30].

Mode of delivery is another key determinant of early immune programming. Vaginal birth provides the first major inoculation of beneficial microbes, which is crucial for training the infant’s immune system. Vaginal birth facilitates vertical transfer of maternal vaginal and intestinal microbiota to the newborn, seeding a diverse and balanced gut microbial community essential for immune tolerance development[31]. In contrast, cesarean section bypasses this exposure, leading to delayed colonization by beneficial bacteria such as Bacteroides and Bifidobacterium and increased dominance of skin-associated microbes (Figure 5). This altered microbial trajectory has been associated with heightened risk of autoimmune and allergic conditions in observational studies, though causality remains under investigation. Strategies such as microbiota restoration at birth (e.g., vaginal seeding) are being explored, though their safety and efficacy are not yet established[32].

Figure 5
Figure 5 Infant gut microbiome composition by delivery mode. This comparison shows how vaginal birth seeds the gut with beneficial bacteria like Bifidobacterium, while C-sections are associated with more skin and environmental microbes.

Early-life microbiome protection continues beyond birth. Exclusive breastfeeding for the first six months provides not only optimal nutrition but also critical immunological components. Breast milk is a living fluid packed with immunological components that protect the infant and cultivate a healthy gut microbiome[33]. It contains secretory immunoglobulin A, which coats mucosal surfaces and prevents pathogen adhesion; human milk oligosaccharides, which selectively nourish beneficial gut bacteria; lactoferrin, lysozyme, and defensins with antimicrobial activity; and viable immune cells that can influence mucosal immune maturation (Figure 6)[34]. Skin-to-skin contact enhances microbial transfer from mother to infant and promotes thermoregulation and bonding. Minimizing unnecessary antibiotic use in early life helps preserve microbial diversity and functional capacity, thereby avoiding disruptions that increase autoimmune risk in genetically predisposed children[35].

Figure 6
Figure 6 The immune power of breastfeeding. Breast milk is a living fluid packed with immunological components that protect the infant and cultivate a healthy gut microbiome. Ig: Immunoglobulin.

Creating a healthy early-life environment is another pillar of primordial prevention. Reducing exposure to air pollution, indoor particulate matter, and passive tobacco smoke reduces the inflammatory load and oxidative stress, thereby perturbing immune tolerance pathways[36]. Avoidance of household chemical exposures - including volatile organic compounds, pesticides, and synthetic fragrances - further supports a balanced immune trajectory[37]. Collectively, these environmental optimizations act synergistically to reduce the likelihood of maladaptive immune priming that could trigger autoimmunity in genetically susceptible children. By integrating maternal health optimization, microbiome-supportive birth and feeding practices, and environmental toxin reduction, primordial prevention addresses autoimmune risk at its root - before the earliest precursors of disease emerge[38].

PRIMARY PREVENTION (PREVENTING DISEASE ONSET IN HIGH-RISK INDIVIDUALS)
Dietary and nutritional interventions

While there’s no guaranteed way to prevent autoimmune disorders in children through diet alone, dietary strategies are among the most accessible and modifiable tools for preventing the onset of autoimmune disease in genetically susceptible children by addressing underlying factors and supporting overall well-being. Nutrition plays a central role in the primary prevention of autoimmunity, particularly in children with a strong genetic predisposition. Dietary exposures influence immune tolerance by modulating systemic inflammation, gut microbiome diversity, and intestinal barrier function[39]. A Western dietary pattern - characterized by high intake of refined sugars, sweetened beverages, processed meats, and ultra-processed foods rich in inflammatory fats and additives - has been linked to gut microbiome dysbiosis, increased intestinal permeability, and upregulation of inflammatory mediators such as C-reactive protein and interleukin-6. Beyond being nutrient-poor, this diet promotes chronic low-grade inflammation, which may predispose susceptible children to immune dysregulation and autoimmunity[40].

Certain dietary choices can help support a healthy immune system and potentially reduce the risk or severity of these conditions. Mounting evidence suggests that an anti-inflammatory nutritional pattern, such as the Mediterranean diet, rich in fresh fruits, vegetables, legumes, whole grains, fish, nuts, seeds, healthy fats, and sources of lean protein, while minimizing processed food, can favorably influence immune homeostasis and reduce chronic low-grade inflammation, a known contributor to autoimmunity[41]. Minimizing intake of processed foods, refined sugars, saturated fats, and food additives is equally essential, as these have been linked to gut dysbiosis, metabolic stress, and pro-inflammatory immune responses. This approach provides abundant fiber to nourish the gut microbiome, phytochemicals with antioxidant activity, and essential micronutrients to meet the developmental demands of childhood[42]. In pediatric populations, anti-inflammatory diets have been associated with reductions in pain, morning stiffness, and inflammatory biomarkers in children with JIA, along with improvements in functional outcomes and increased fecal butyrate levels, suggesting both systemic and gut-mediated benefits[43].

Vitamin D plays a particularly prominent role in immune regulation. Beyond its classical effects on calcium and bone metabolism, it enhances regulatory T-cell function, promotes immune tolerance, and suppresses excessive pro-inflammatory cytokine release[44]. Observational studies have demonstrated associations between adequate vitamin D levels and reduced incidence of T1DM and multiple sclerosis, especially in populations at higher latitudes or with limited sun exposure. Preventive strategies that emphasize optimal vitamin D sufficiency during pregnancy, infancy, and childhood may therefore provide a low-cost, scalable means of reducing autoimmune risk[45,46].

Omega-3 fatty acids, predominantly eicosapentaenoic acid and docosahexaenoic acid, found in fatty fish and specific plant sources, further modulate the immune response by competing with pro-inflammatory omega-6 fatty acids in eicosanoid pathways. Their metabolites (resolvins and protectins) actively resolve inflammation, attenuate antigen-presenting cell activation, and reduce Th17-driven autoimmune pathways[47]. Supplementation during pregnancy and early life has been linked to lower rates of allergic sensitization and asthma, and emerging data suggest protective effects against autoimmune disorders such as rheumatoid arthritis and T1DM[48].

Dietary exposures in early life also shape immune tolerance. Historically, delaying exposure to allergens such as peanuts and eggs was thought to reduce the risk of allergy. Still, landmark clinical trials (e.g., Learning Early About Peanut Allergy and Enquiring About Tolerance studies) have reversed this paradigm. Introducing these foods during infancy promotes oral tolerance, training the immune system to recognize dietary proteins as safe rather than as threats (Figure 7). This paradigm offers a conceptual framework for how controlled dietary exposures during critical developmental windows could be applied to prevent broader immune-mediated diseases, not just allergies[49,50].

Figure 7
Figure 7 Eary allergen introduction and immune tolerance. The infographic shows that a controlled, early exposure to certain foods can train the immune system, promoting tolerance rather than reactivity. This provides a powerful model for preventing immune-mediated diseases. GALT: Gut-associated lymphoid tissues.

While no single “autoimmune diet” has been universally defined, nutritional strategies should be individualized with the overarching goal of optimizing gut health and reducing the body’s inflammatory burden. A widely adopted framework in pediatric autoimmune care is the 5R protocol, which provides a systematic approach to dietary and lifestyle modification (Figure 8)[51]. The first step, remove, focuses on eliminating nutritional triggers such as common allergens (wheat, dairy, eggs, soy, nuts, fish, shellfish, sesame) as well as ultra-processed foods, artificial sweeteners, food dyes, additives, and environmental toxins that may impair gut integrity and provoke immune activation. The second step, replace, emphasizes supporting digestion and absorption by replenishing deficient digestive enzymes, bile acids, or hydrochloric acid when clinically indicated, while also addressing key micronutrient deficiencies, particularly vitamin D and iron. The third component, reinoculate, aims to restore microbial balance by introducing probiotics, prebiotics, and fermented foods such as yogurt, kefir, sauerkraut, and kimchi, all of which have been linked to improved gastrointestinal and immune health in children with autoimmune conditions. The fourth step, repair, focuses on strengthening the gut barrier with nutrients such as L-glutamine, zinc carnosine, and omega-3 fatty acids, thereby enhancing mucosal healing and reducing intestinal permeability. Finally, rebalancing incorporates long-term, sustainable dietary and lifestyle measures, including adherence to an anti-inflammatory diet, stress management, adequate sleep, outdoor activity, and regular physical exercise, all of which help maintain gut and immune homeostasis[52-54]. For children with celiac disease, strict adherence to a gluten-free diet is mandatory. Still, gluten avoidance may also be considered in other autoimmune conditions, given the potential role of gliadin in upregulating zonulin and disrupting intestinal barrier integrity. However, such strategies should be carefully individualized and guided by clinical expertise to avoid unnecessary dietary restriction[55].

Figure 8
Figure 8 The 5 Rs protocol for pediatric autoimmune nutrition care and educating the immune system. This flowchart illustrates the 5R protocol - remove, replace, reinoculate, repair, and rebalance - as a structured approach to restoring and maintaining gut health in children to prevent autoimmune disorders. Remove focuses on eliminating harmful pathogens, allergens, and dietary triggers that disrupt the gut environment. Replace emphasizes replenishing essential digestive enzymes and nutrients required for optimal gastrointestinal function. Reinoculate involves restoring beneficial bacteria through probiotics and prebiotics to re-establish microbial balance. Repair highlights the importance of nutrients such as zinc, glutamine, and omega-3 fatty acids in strengthening the intestinal lining and reducing inflammation. Rebalance promotes long-term gut health through stress management, adequate sleep, and sustainable lifestyle modifications. Together, these five interconnected steps form a comprehensive strategy for improving gastrointestinal integrity, reducing dysbiosis, and supporting systemic health in pediatric populations.

Practical implementation remains a challenge in pediatric care, as restrictive diets can be socially isolating and difficult to maintain. Family-centered approaches, in which parents and siblings adopt similar dietary practices, may enhance adherence and reduce stigma[56,57]. Actively involving children in meal planning, grocery shopping, and cooking has been shown to increase engagement, autonomy, and long-term adherence to anti-inflammatory eating patterns. Strategies such as modeling healthy behaviors, creating routine family meals, encouraging nutrient-dense snacks, replacing sweetened beverages with water, and minimizing reliance on restaurant or processed foods can help integrate anti-inflammatory nutrition into daily life[58]. Despite logistical and behavioral challenges, evidence supports a strong link among diet, gut health, and immune outcomes in children at risk of autoimmunity. By combining nutrient sufficiency, microbial support, and reducing pro-inflammatory dietary exposures, nutritional interventions represent a powerful, modifiable strategy for delaying or preventing the onset of autoimmune diseases in high-risk pediatric populations[39].

Microbiome and immune modulation

The human microbiome, particularly the gut microbiota, a complex ecosystem of trillions of microorganisms, plays a critical role in shaping immune development and maintaining immune tolerance, thereby influencing susceptibility to autoimmune diseases[59]. According to the “Old Friends Hypothesis”, early-life exposure to diverse and beneficial microbes, many of which have co-evolved with humans for millennia, is essential for training the immune system to distinguish between harmful pathogens and harmless antigens[60]. This educational process occurs during a highly sensitive “window of opportunity” known as the first 1000 days (from conception to age two). As illustrated in Figure 1, this period follows a precise temporal sequence in which maternal health, delivery mode, and early feeding patterns dictate the trajectories of both microbial colonization and immune maturation.

The presence of a rich and diverse microbiome during critical developmental windows, particularly in the first few years of life, is essential for a balanced and mature immune system capable of distinguishing self from non-self[61]. Reduced microbial exposure due to modern lifestyles - characterized by increased hygiene, cesarean deliveries, limited breastfeeding, and urban living - has been implicated in failure to properly “educate” the immune system and the rising incidence of autoimmune and allergic diseases in children. This lack of early microbial interaction may impair regulatory T-cell development and lead to exaggerated immune responses later in life[62].

Another key aspect of microbiome-immune interaction is the cautious use of antibiotics in childhood. While antibiotics are lifesaving when clinically indicated, unnecessary or repeated prescriptions can disrupt gut microbial diversity, leading to long-term consequences for immune regulation[63]. A large body of evidence from both animal models and human cohort studies has demonstrated that antibiotic use, especially in infancy and early childhood, is associated with a higher risk of developing autoimmune conditions like IBD and T1DM[35]. For instance, studies have shown a dose-dependent relationship between early antibiotic exposure and increased risk of IBD, with some evidence suggesting that broad-spectrum antibiotics are particularly disruptive. This is because antibiotics can indiscriminately kill beneficial bacteria, leading to a loss of microbial diversity and a shift towards pro-inflammatory microbial profiles. Such dysbiosis can alter the production of key metabolites, such as short-chain fatty acids like butyrate, which are crucial for maintaining gut barrier integrity and promoting a tolerant immune response[64,65]. This disruption represents a significant “window of vulnerability” in the developmental roadmap, where the loss of microbial signaling can serve as the environmental spark for preclinical autoimmunity, increasing the risk of conditions such as T1DM, IBD, and asthma. Therefore, stewardship in antibiotic prescribing, ensuring their use only when necessary, is a cornerstone in preserving microbiome health and preventing immune dysregulation in high-risk children[66].

Beyond avoiding harm, targeted microbiome modulation strategies are emerging as promising avenues for autoimmune prevention. Probiotics, such as Lactobacillus rhamnosus GG and certain Bifidobacterium strains, have shown potential to influence immune maturation and reduce the risk of autoimmunity in both experimental and clinical studies[67]. In contrast, next-generation probiotics and engineered strains offer more targeted immunomodulation by restoring specific metabolic pathways, such as the induction of regulatory T cells through the production of short-chain fatty acids. For more severe dysbiosis, fecal microbiota transplantation (FMT) is being explored as a method of complete ecological reconstruction, though its application in pediatric prevention requires further standardization (Figure 9). Supplementation during pregnancy or early infancy, for example, has been investigated to relieve atopic dermatitis and modulate markers of autoimmunity, though findings remain heterogeneous and strain-specific. For conditions such as T1DM and JIA, the evidence remains insufficient to recommend universal preventive use[68]. Clinical trials have produced mixed results, underscoring the need to identify optimal microbial strains, dosages, and treatment windows to achieve durable immunomodulation.

Figure 9
Figure 9 Comparative mechanisms of microbiome-targeted interventions in pediatric autoimmunity. This schematic illustrates the distinct pathways through which different microbiome therapeutics influence the gut environment and systemic immune signaling. Traditional probiotics: Utilize exogenous strains (e.g., Lactobacillus) to provide transient competitive inhibition of pathogens and general immune support. Next-generation probiotics: Employ rationally selected commensal bacteria (e.g., Akkermansia muciniphila) that target specific metabolic pathways, such as short-chain fatty acids production, to enhance gut barrier function and induce regulatory T cells-mediated tolerance. Fecal microbiota transplantation: Involves the transfer of a complete, diverse microbial ecosystem to achieve broad-scale restoration of the gut-immune axis. The diagram highlights how these interventions move from transient modulation (probiotics) to targeted functional restoration (next-generation probiotics) and finally to complete ecological reconstruction (fecal microbiota transplantation). NGPs: Next-generation probiotics; FMT: Fecal microbiota transplantation; SCFA: Short-chain fatty acids.

Similarly, prebiotics - non-digestible dietary fibers that selectively promote beneficial bacteria - exert immunomodulatory effects through short-chain fatty acid production, which enhances regulatory T-cell expansion and anti-inflammatory pathways. Current data suggest that the efficacy of both probiotics and prebiotics depends on selecting the right strain, dose, and timing, reinforcing the importance of precision approaches[69]. A “one-size-fits-all” strategy is unlikely to succeed; instead, future interventions will likely require personalization based on genetic background and baseline microbiome composition. Taken together, the preservation and strategic modulation of the microbiome hold significant promise for preventing the onset of autoimmune disease in genetically predisposed individuals[70]. By combining principles of judicious antibiotic use with proactive microbiome-targeted interventions, clinicians may reduce autoimmune risk and promote healthier immune development during the critical early-life window.

Reducing environmental triggers

Environmental factors play a critical role in the onset and progression of autoimmune diseases, often interacting with genetic susceptibility to disrupt immune tolerance. Strategies to reduce or eliminate modifiable environmental triggers are therefore central to primary prevention in high-risk children (Table 2)[71]. Tobacco smoke exposure, both direct and secondhand, has been consistently associated with immune dysregulation and heightened risk of autoimmune conditions, including T1DM, multiple sclerosis, and JIA[72]. Both prenatal and postnatal exposures can alter immune development by promoting systemic inflammation, impairing regulatory T-cell function, and inducing epigenetic modifications that may persist long after exposure has ceased. Eliminating exposure to second-hand smoke in the household and during pregnancy remains one of the most impactful and practical preventive measures[73].

Table 2 Environmental triggers of autoimmune disorders and preventive strategies.
Environmental trigger
Associated autoimmune risk
Proposed mechanism
Prevention strategy
Tobacco smokeJIA, T1DM, multiple sclerosis, rheumatoid arthritis, SLEInduces oxidative stress, promotes pro-inflammatory cytokines, impairs T-cell function, and alters epigenetic markersComplete avoidance of prenatal and second-hand smoke exposure
Endocrine disruptors (e.g., BPA, phthalates, pesticides)Increased autoantibody production, immune dysregulationMimic or block hormones critical for immune regulation; can alter gut microbiome and promote inflammationUse glass/stainless steel containers, avoid microwaving in plastic, buy organic produce, and use non-toxic household products
Infections (viruses and bacteria)T1DM (enteroviruses), lupus (EBV), myocarditis (coxsackievirus)Molecular mimicry (pathogen antigens resemble self-antigens), bystander activation (inflammation damages tissues and releases self-antigens)Adhere to vaccination schedules for preventable diseases
Nutrient deficiencies (vitamin D)T1DM, SLE, multiple sclerosis, rheumatoid arthritisImpairs regulatory T-cell function and promotes pro-inflammatory Th1 and Th17 pathwaysEnsure adequate vitamin D intake through sunlight exposure, fortified foods, or supplementation as recommended by a physician
Diet (high sugar/fat, low fiber)IBD, T1DM, rheumatoid arthritisPromotes gut dysbiosis, “leaky gut” (increased intestinal permeability), and systemic inflammationEmphasize a diet rich in fiber, fruits, vegetables, and whole grains; limit processed foods, sugar, and unhealthy fats
Stress (physical/psychological)IBD, psoriasis, rheumatoid arthritis, SLEActivates the hypothalamic-pituitary-adrenal axis, leading to the release of stress hormones (e.g., cortisol) and pro-inflammatory cytokines that can exacerbate autoimmunityPromote stress-reduction techniques such as mindfulness, adequate sleep, and physical activity
Overly sterile environmentImpaired immune tolerance (hygiene hypothesis)Lack of exposure to diverse microbes and parasites in early life impairs the maturation of regulatory T-cells and other immune-modulating pathwaysEncourage balanced microbial exposure through outdoor play, pets, and safe interaction with natural environments

Endocrine-disrupting chemicals, such as BPA, phthalates, and organophosphate pesticides, have raised increasing concern due to their immunotoxic and hormone-mimicking properties. Early-life exposure to these compounds has been linked to immune imbalance, increased autoantibody production, and a heightened risk of autoimmunity[74]. Practical avoidance strategies include limiting the use of BPA-containing plastics, avoiding microwaving food in plastic containers, choosing glass or stainless-steel alternatives, and prioritizing fresh or organic produce to minimize pesticide exposure. Although the complete elimination of endocrine-disrupting chemicals is unrealistic in modern environments, awareness of and reduction of high-exposure sources can significantly mitigate risk[75,76].

Infection control represents another crucial area of preventive focus. While certain infections can act as immune triggers that precipitate autoimmune processes, controlled exposure to microbes is essential for healthy immune maturation. Vaccination adherence provides a safe and effective means of protecting children against infections that exacerbate autoimmune susceptibility, such as enteroviruses in T1DM[77,78]. On the same hand, the “hygiene hypothesis” underscores that controlled exposure to microbes in early life may help calibrate immune tolerance. This means fostering a balanced approach - ensuring full vaccination coverage while encouraging safe interactions with natural environments, pets, and peers - appears to offer the best protective effect[79,80]. This balance between protection and natural immune education is critical, ensuring children are safeguarded from harmful pathogens while preserving the beneficial microbial exposures required for long-term immune stability. Overall, reducing environmental triggers requires a multifaceted approach that combines lifestyle adjustments, parental education, and public health measures. By addressing tobacco exposure, minimizing endocrine disruptor contact, and promoting thoughtful infection control, families and clinicians can create a safer developmental environment that lowers the likelihood of autoimmune disease initiation in genetically predisposed children[81,82].

SECONDARY PREVENTION (EARLY DETECTION IN ASYMPTOMATIC HIGH-RISK CHILDREN)
Screening: Periodic antibody panels in genetically susceptible children

Secondary prevention of autoimmune diseases focuses on early detection in asymptomatic but high-risk children to identify disease-specific immune activity before clinical manifestations occur. The cornerstone of this approach is periodic screening using autoantibody panels, tailored to the child’s genetic susceptibility and family history (Table 3)[83]. This predictive strategy enables clinicians to identify children most likely to progress toward clinical disease and implement early interventions. For genetically predisposed children - such as those with a first-degree relative diagnosed with an autoimmune disorder or who carry high-risk HLA genotypes - regular blood testing can reveal the presence of disease-related autoantibodies years before symptoms appear. This process of identifying subclinical autoimmunity represents a pivotal shift from a reactive, symptomatic diagnostic model to a proactive disease-interception strategy[84,85]. However, it is essential to acknowledge a significant disparity in the quality of clinical evidence and the degree of protocol standardization across different conditions. While screening for T1DM and celiac disease is supported by robust longitudinal data, screening for other conditions such as SLE and JIA remains less standardized and often exploratory.

Table 3 Periodic antibody screening for early detection of autoimmune diseases in high-risk children.
Autoimmune disease
High-risk population
Key antibodies for screening
Interpretation
Potential early intervention
Established standard
T1DMChildren with a first-degree relative with T1DM or high-risk HLA genotypesGAD65, IA-2, insulin autoantibodies, ZnT8High evidence quality: ≥ 2 positive antibodies = high risk of progression to diabetesClose monitoring, enrollment in prevention trials (e.g., teplizumab for stage 2), lifestyle/dietary counseling
Celiac diseaseChildren with a first-degree relative with celiac disease, or high-risk HLA (DQ2/DQ8)Anti-tTG (IgA), EMA, deamidated gliadin peptide antibodiesHigh evidence quality: Positive serology suggests a high likelihood of disease and villous atrophy even in asymptomatic childrenEarly dietary intervention (gluten-free diet) to prevent growth failure and nutritional deficiencies
Autoimmune thyroid diseaseChildren with a family history of thyroid disease, or other autoimmune disorders (e.g., T1DM, down syndrome, turner syndrome)Anti-thyroid peroxidase, anti-thyroglobulinModerate-high evidence quality: Antibody positivity often precedes clinical hypothyroidism/thyroiditisMonitoring thyroid function, early initiation of hormone therapy if indicated
Emerging/research
SLE (research/experimental use)Offspring of mothers with SLE or anti-Ro/SSA positivityANA, anti-dsDNA, anti-Ro/SSA. Antibodies may appear before clinical diseaseLower specificity: ANA is highly sensitive but lacks specificity for prediction in asymptomatic childrenSerial monitoring; counseling on sun protection and infection triggers; hydroxychloroquine in specific research cohorts
JIAChildren with a strong family history of JIA or early-onset uveitisANA, RF, anti-CCP, HLA-B27Lower evidence quality: ANA is primarily a marker for uveitis risk; RF/anti-CCP are predictive of severe polyarticular course but not disease onsetBaseline ophthalmologic exam for uveitis; prompt referral upon subtle musculoskeletal symptoms

The best-established examples of a successful secondary prevention strategy is screening children at risk of T1DM and celiac disease. Screening for T1DM involves testing for a panel of islet autoantibodies, including GAD65, IA-2, insulin autoantibodies, and zinc transporter 8 antibodies. The detection of two or more autoantibodies strongly correlates with a high lifetime risk of developing diabetes, often preceding the onset of hyperglycemia by several years[86]. For instance, the presence of these antibodies signifies a progression from the initial “at-risk” stage to a more advanced stage of subclinical autoimmunity. Early identification opens opportunities for close monitoring, participation in clinical trials for new preventive therapies (e.g., immunomodulatory drugs), and timely clinical intervention to manage the transition from subclinical autoimmunity to overt disease.

High-risk individuals for celiac disease, such as children with a first-degree relative with celiac disease or those with HLA-DQ2/DQ8 genotypes, may benefit from periodic screening with serological markers. The primary markers are anti-tTG antibodies and, in some cases, anti-endomysial antibodies. Detecting these antibodies early enables timely dietary modifications, such as adopting a gluten-free diet, which can prevent irreversible intestinal damage and nutrient malabsorption, and reduce the risk of long-term complications[87,88]. This proactive intervention halts the autoimmune process triggered by gluten ingestion, protecting the gut and overall health.

The value of targeted screening extends beyond T1DM and celiac disease. Screening for other autoimmune conditions, such as autoimmune thyroid disease and SLE, is also being explored. In autoimmune thyroid disease, screening for anti-thyroid peroxidase (TPO) and anti-thyroglobulin antibodies in at-risk children (e.g., those with T1DM or family history) can detect early thyroid dysfunction[89]. While ANA are highly sensitive markers that often precede clinical SLE by years, they lack the high specificity of T1DM markers. Current recommendations focus on high-risk individuals, such as offspring of mothers with anti-Ro/Sjögren syndrome-related antigen A antibodies, using a panel of ANA, anti-dsDNA, and anti-Sm. In these cases, longitudinal monitoring of ANA, anti-dsDNA, and anti-Sm is used to track the “immunological signature” of disease evolution, though universal screening intervals are not yet standardized[90]. In JIA, predictive screening is currently less standardized than for T1DM. ANA positivity is a critical marker for stratifying uveitis risk in children with established JIA, but has limited specificity as a lone predictive tool for disease onset in asymptomatic children. For those with a strong family history, monitoring for rheumatoid factor and anti-cyclic citrullinated peptide is recommended only when subtle clinical signs emerge, emphasizing the need for clinician vigilance rather than routine laboratory screening in asymptomatic cohorts[18,43,72].

It is important to note that screening is not recommended for the general pediatric population but is highly effective when targeted to children with established risk factors. This approach, while promising, also poses challenges, including the psychological burden on families of knowing their child is at risk and the need for standardized screening protocols[91]. However, by enabling earlier dietary, lifestyle, or pharmacological interventions, periodic antibody screening is a pivotal tool in secondary prevention, offering a clear pathway toward a future in which autoimmune diseases can be intercepted and managed before they cause significant clinical harm.

Surveillance

Following the identification of high-risk children through screening, surveillance becomes the next critical step in secondary prevention. It aims to identify early physiological changes in asymptomatic, high-risk children that may signal the onset of autoimmune disease before clinical manifestations occur. This involves systematic and ongoing monitoring for the earliest signs of immune dysregulation or disease progression, even before classic clinical symptoms appear. Unlike one-time screening, surveillance is a continuous process that allows clinicians to track a child’s health trajectory and intervene at the optimal moment. Regular monitoring allows for early intervention, potentially mitigating disease progression and preventing long-term complications.

For children identified as high-risk for T1DM through antibody screening, surveillance includes regular monitoring of blood glucose and hemoglobin A1c levels. This enables early detection of subtle changes, such as impaired glucose tolerance, which signal progression from subclinical autoimmunity to symptomatic disease. Timely detection of these changes allows rapid intervention to prevent diabetic ketoacidosis, a life-threatening complication at the time of diagnosis[92].

For autoimmune thyroid disease, periodic thyroid function monitoring is recommended for children at elevated risk, particularly those with a family history of thyroid autoimmunity, T1DM, or other autoimmune disorders. Screening typically involves measuring serum thyroid-stimulating hormone and free thyroxine levels, supplemented by testing for TPO or thyroglobulin autoantibodies when indicated. This approach can identify subclinical hypothyroidism or hyperthyroidism, allowing for prompt initiation of treatment, reducing risks of impaired growth, neurocognitive effects, and metabolic complications[93,94].

Growth tracking is a valuable, non-invasive surveillance tool for several pediatric autoimmune conditions. For children at risk for celiac disease or IBD, a decline in growth velocity or a sudden drop in weight-for-height percentile can be an early indicator of disease activity. This is due to nutrient malabsorption or chronic inflammation, which can affect a child’s ability to thrive[95,96]. Similarly, growth tracking can be a simple yet effective component of surveillance for other chronic conditions, such as JIA[97].

Overall, surveillance is a dynamic and personalized process that complements targeted screening. It shifts the focus from a single data point to a continuous health profile, allowing clinicians to make informed decisions and initiate interventions that can alter the course of autoimmune disease, improve long-term outcomes, and prevent serious complications[98].

Lifestyle optimization upon early detection

When early screening or surveillance reveals autoimmune-related biomarkers or subclinical abnormalities in genetically predisposed but asymptomatic children, lifestyle optimization emerges as a critical secondary preventive measure. These strategies aim to modulate the immune system and reduce the risk of progression to overt autoimmune disease by addressing modifiable environmental and nutritional factors that influence immune homeostasis[99]. Figure 10 shows a clinical decision-support algorithm for lifestyle optimization in children at high risk of autoimmune disease.

Figure 10
Figure 10  Clinical decision-support algorithm for lifestyle optimization in children at high risk of autoimmune disease. This one-panel schematic illustrates a clinical decision-support algorithm for the early identification and management of children at high risk for autoimmune diseases. Children with genetic susceptibility or family history first receive primordial prevention education, followed by targeted autoantibody screening. Autoantibody-negative children continue routine care with periodic re-evaluation, whereas autoantibody-positive children enter a preclinical autoimmune pathway combining structured lifestyle optimization and active surveillance. The algorithm integrates prevention, monitoring, and multidisciplinary care with the goal of delaying or preventing progression to overt autoimmune disease. HLA: Human leukocyte antigen; PRS: Polygenic risk scores; T1DM: Type 1 diabetes mellitus; SLE: Systemic lupus erythematosus; IR: Insulin Resistance.

Dietary adjustments play a foundational role, particularly in conditions such as celiac disease or T1DM. For children with early signs of celiac disease autoimmunity, implementing a gluten-free diet can prevent the inflammatory cascade that leads to intestinal damage[100]. Similarly, for other autoimmune conditions such as T1DM and IBD, adopting a diet that reduces processed foods, refined sugars, and unhealthy fats while emphasizing whole foods, fruits, and vegetables, lean proteins, and omega-3 fatty acids can help reduce systemic inflammation and support a healthy gut microbiome[101,102].

Vitamin D correction is another critical intervention, given the strong association between vitamin D deficiency and autoimmunity. Low vitamin D levels are common in children at risk of autoimmunity and are associated with a pro-inflammatory immune state[103]. Regular monitoring of serum 25-hydroxyvitamin D levels and correction of any deficiency through supplementation is a simple yet powerful strategy to support regulatory T-cell function, preserve immune tolerance, and reduce the likelihood of disease onset. Clinical trials have shown that adequate vitamin D levels may help reduce the risk of T1DM progression in high-risk individuals[104].

Furthermore, microbiome support plays a key role in lifestyle optimization, as gut dysbiosis is implicated in multiple autoimmune diseases. Beyond dietary fiber, targeted use of probiotics and prebiotics can help restore and maintain a healthy gut microbiota, promote a healthy microbial ecosystem, improve gut barrier integrity, and balance immune activity[9]. For example, specific probiotic strains have been shown to improve gut barrier function and reduce inflammation in some studies. This approach, though still evolving, aims to directly address gut dysbiosis, which often precedes the onset of autoimmune disease[105]. Moreover, interventions such as breastfeeding promotion in infancy and cautious antibiotic use during childhood support the long-term development of a resilient microbiota[106].

Other strategies include promoting stress management, ensuring adequate age-appropriate physical activity, and optimizing sleep quality, all of which have been shown to influence immune function. By combining these lifestyle interventions, clinicians and families can create an environment that promotes immune balance and resilience, potentially delaying or even preventing progression to full-blown autoimmune disease in genetically susceptible children[107]. By integrating lifestyle optimization into secondary prevention frameworks, clinicians and families may have the opportunity to intervene at a pivotal stage - potentially delaying or even preventing the clinical onset of autoimmune diseases[108].

Targeted clinical trials: Pre-symptomatic immunomodulation

The ultimate goal of secondary prevention is not just to detect autoimmune disease early, but to stop its progression. This is the purpose of targeted clinical trials investigating pre-symptomatic immunomodulation and intervening before the clinical onset of disease, thereby delaying or even preventing the transition from subclinical autoimmunity to overt autoimmune pathology. These trials enroll high-risk, asymptomatic children - identified through screening and surveillance - to test therapies designed to retrain the immune system and prevent clinical disease onset[108,109].

Several clinical trials are currently exploring whether immune tolerance can be induced in children who carry high-risk genotypes or who already show early serological evidence of autoimmunity (such as autoantibodies). The most notable success in this area is the use of teplizumab, a monoclonal antibody targeting the CD3 epsilon chain of the T-cell receptor complex. Unlike broad immunosuppressants, teplizumab acts as a partial T-cell receptor agonist that modulates the immune environment without systemic depletion[110,111]. As detailed in Figure 11, teplizumab induces a state of functional “exhaustion” or anergy in autoreactive CD8+ effector T cells, characterized by the upregulation of inhibitory markers such as programmed cell death protein 1 and T cell immunoreceptor with immunoglobulin and tyrosine-based inhibitory motif domain. Simultaneously, it appears to shift the broader immune regulatory network toward tolerance by promoting the expansion or preservation of regulatory T cells. This targeted modulation dampens the cytotoxic inflammatory attack on pancreatic islets, effectively preserving residual beta-cell mass and endogenous insulin production. Clinical trials have shown that a single 14-day course of teplizumab in high-risk individuals with stage 2 T1DM (multiple autoantibodies and abnormal glucose tolerance) can significantly delay the onset of clinical diabetes by a median of about two to three years. This ground-breaking finding led to teplizumab’s approval as the first drug to delay the progression of an autoimmune disease. This success validates the entire secondary prevention approach, demonstrating that intervention during the pre-symptomatic stage can alter the natural history of the disease[110].

Figure 11
Figure 11  Mechanistic action of teplizumab and β-cell preservation in stage 2 type 1 diabetes. This figure illustrates the cellular and immunological mechanisms by which teplizumab delays disease progression in stage 2 (preclinical) type 1 diabetes, highlighting the critical importance of treatment timing. The schematic is presented as a before-after comparison. On the left, an active autoimmune attack is shown, characterized by autoreactive CD8⁺ cytotoxic T cells infiltrating the pancreatic islet and inducing β-cell destruction through perforin- and granzyme-mediated cytotoxicity, accompanied by pro-inflammatory cytokine release (e.g., interleukin-2, interferon-gamma). On the right, teplizumab-induced immune modulation is depicted. Teplizumab, an anti-CD3 monoclonal antibody, binds to the CD3ε chain of the T-cell receptor complex on autoreactive CD8⁺ T cells, inducing a metabolic and functional shift toward T-cell “exhaustion” or anergy. This state is characterized by reduced effector function and upregulation of inhibitory markers such as programmed cell death protein 1 and T cell immunoreceptor with immunoglobulin and immunoglobulin and tyrosine-based inhibitory motif domain, resulting in diminished cytokine secretion and cytotoxic activity. Concurrently, teplizumab promotes a regulatory immune network, supporting the expansion and functional activity of regulatory T cells. These cells secrete immunosuppressive cytokines (e.g., interleukin-10 and transforming growth factor-beta), actively suppressing ongoing autoimmune inflammation within the islet microenvironment. The combined effects of effector T-cell attenuation and enhanced immune regulation lead to preservation of residual β-cell mass, maintenance of insulin granules, and prolonged endogenous insulin secretion. A highlighted timeline emphasizes the stage 2 clinical window, defined by the presence of diabetes-associated autoantibodies with preserved β-cell function and normoglycemia. Intervention during this phase maximizes the disease-modifying potential of teplizumab, delaying progression to symptomatic (stage 3) type 1 diabetes. T1D: Type 1 diabetes; IL: Interleukin; IFN: Interferon; PD-1: Programmed cell death protein 1; TGF: Transforming growth factor; TIGIT: T cell immunoglobulin and inflammation within the islet microenvironment domain.

Another promising avenue has been oral or intranasal insulin trials. The idea is to expose the immune system to insulin orally or nasally in a controlled, non-inflammatory manner, in hopes of inducing immune tolerance to the very protein it mistakenly attacks and reducing autoreactive T-cell responses[112,113]. While early trials did not show a significant effect in the overall population, a subgroup analysis revealed that oral insulin might delay the onset of T1DM in children with high insulin autoantibody levels[114]. This finding highlights the importance of a more personalized, or “precision medicine”, approach: Tailoring interventions to immunological profiles and targeting specific subgroups of at-risk individuals, which may be more effective.

Similar immunomodulatory strategies are being tested for coeliac disease by examining the optimal timing of gluten introduction and by using controlled antigen-exposure studies[115]. In addition, trials of low-dose immunomodulators or micronutrient supplementation (e.g., selenium) were conducted to slow the progression of autoimmune thyroiditis[116]. Similarly, early B-cell-targeted therapies were tried in high-risk children with multiple sclerosis with positive radiological or serological markers[117].

These trials represent a paradigm shift in the treatment of autoimmune diseases. Instead of waiting for symptoms and managing the disease, the focus is on a proactive, interventional approach to prevent it from ever fully manifesting. While these therapies are not yet widespread, they are paving the way for a future in which autoimmune diseases may be preventable rather than just manageable. However, conducting such trials in children raises critical ethical challenges. Since these individuals are asymptomatic, the risk-benefit balance must be carefully evaluated. Long-term safety, parental consent, and psychosocial implications of labeling a child “pre-symptomatic” require thoughtful navigation. Moreover, sustained follow-up and international collaboration are essential to generate robust evidence.

TERTIARY PREVENTION (PREVENTING COMPLICATIONS IN ESTABLISHED AUTOIMMUNE DISEASE)
Early aggressive therapy

Once an autoimmune disease is clinically established, tertiary prevention strategies become essential to limit long-term complications, prevent irreversible organ damage, and preserve organ function. Early, aggressive therapy is a cornerstone of this approach, aiming not only to control disease symptoms before they cause significant and lasting harm, but also to halt or slow disease progression at the earliest stages[118]. The rationale is that irreversible organ damage often occurs before the disease reaches its chronic phase; therefore, the initial period of an autoimmune disease is a critical window of opportunity in which the inflammatory process can be most effectively halted, and timely intervention can profoundly alter the natural course of illness[119].

Disease-modifying therapies, such as biologics and targeted immunomodulators, have transformed the management of conditions like T1DM, JIA, and pediatric IBD. These agents specifically target immune pathways, thereby reducing chronic inflammation and preventing cumulative tissue injury[120]. In conditions like JIA, delaying effective treatment can lead to permanent joint destruction, pain, and disability. The standard of care has shifted from a “step-up” approach to a “treat-to-target” strategy, in which the goal is to achieve and maintain remission. This often involves the prompt use of disease-modifying antirheumatic drugs, such as methotrexate, and, increasingly, biologic therapies that target specific inflammatory cytokines, such as tumor necrosis factor inhibitors[121,122]. When initiated early, these treatments can suppress inflammation, prevent the progression of joint damage, reduce disability in children, and improve growth outcomes.

Similarly, in SLE, early and aggressive therapy is crucial to prevent multi-organ involvement, particularly kidney damage (lupus nephritis). Treatment typically begins with corticosteroids and is often combined with other immunosuppressants, such as mycophenolate mofetil or cyclophosphamide. The goal is not just to manage symptoms but to directly suppress the autoimmune response to protect vital organs[123,124]. Additionally, in pediatric T1DM, immunotherapeutic strategies under investigation aim to preserve residual β-cell function, thereby reducing the long-term burden of microvascular and macrovascular complications[125].

Beyond pharmacological interventions, multidisciplinary therapeutic measures are equally vital. Structured physiotherapy and occupational therapy in autoimmune rheumatic diseases support musculoskeletal health and functional independence[126]. Nutritional optimization - ensuring adequate vitamin D, calcium, and micronutrients - can mitigate the risk of osteoporosis and other systemic complications[127]. Moreover, tight monitoring of comorbidities, such as cardiovascular risk in SLE, enables integrated care that addresses both immediate and long-term threats[128].

Overall, early aggressive therapy in tertiary prevention underscores the importance of prompt recognition, swift initiation of disease-modifying treatment, and holistic patient care. This proactive approach underscores a fundamental shift in the management of autoimmune disease and can significantly reduce the disease burden[129]. Instead of waiting for complications to arise, clinicians now work to pre-emptively shut down the destructive immune attack, thereby preserving organ function, improving the long-term quality of life for children with these chronic conditions, and improving their survival outcomes.

Education and empowerment

Education and empowerment are cornerstones of tertiary prevention in children with established autoimmune diseases. Beyond pharmacological treatment, equipping patients and their families with the knowledge and skills needed for effective long-term disease management fosters better disease management, adherence, and quality of life[130]. Family-centered disease management recognizes that children depend heavily on caregivers for treatment adherence, lifestyle choices, and emotional support. This approach moves beyond passive treatment by clinicians to an active partnership in care[131].

A core element is the development of a family-centered disease management plan. This plan is not a one-size-fits-all approach but is tailored to the child’s specific needs, lifestyle, and developmental stage. Structured educational programs help families understand the natural history of autoimmune diseases, potential complications, and the importance of timely interventions[132]. Such programs often include training on medication use and possible side effects, recognizing symptoms and early signs of disease flares, maintaining appropriate nutrition, infection prevention strategies, and crisis management. The goal is to demystify the disease and its treatment, helping families feel more in control and less overwhelmed[133]. For conditions such as T1DM, teaching parents and children how to monitor blood glucose, count carbohydrates, and administer insulin is essential[134]. For a child with JIA, education would focus on the importance of medication adherence, the role of physical therapy, and strategies for managing pain and joint stiffness[135]. Similarly, in autoimmune thyroiditis or celiac disease, guidance on hormone monitoring and strict dietary adherence is critical[136].

Empowerment strategies go beyond education by encouraging active participation in care planning and shared decision-making. It involves fostering the child’s self-advocacy as they grow. As children become adolescents, they are encouraged to take on a greater role in their own care, from tracking their symptoms to communicating with their healthcare team[137]. This transition is essential to ensuring long-term treatment adherence and a smoother transition to adult care. This can be achieved by setting realistic goals for disease management, adapting school and social activities to the child’s health needs, and ensuring psychosocial support to minimize stigma and improve resilience. Digital tools such as mobile applications, telemedicine consultations, and online peer-support groups further enhance empowerment by providing accessible resources and fostering a sense of community[138].

Ultimately, family-centered approaches improve adherence, reduce complications, and promote a holistic model of care. By involving the entire family unit, these strategies not only safeguard the child’s immediate health but also lay the foundation for long-term self-management and independence as the child transitions into adulthood[139]. By prioritizing education and empowerment, tertiary prevention aims to reduce disease-related anxiety, improve quality of life, and decrease the risk of long-term complications that often arise from poor disease control[140].

Comorbidity prevention

Children with established autoimmune diseases are at heightened risk of developing comorbidities that may significantly impact long-term health outcomes. In addition, chronic inflammation and long-term use of certain medications can increase the risk of other health issues[141]. Therefore, tertiary prevention for established autoimmune diseases also includes proactive strategies to prevent and manage associated comorbidities. A comprehensive management plan must address these potential complications through a multidisciplinary approach to care[142].

One of the most critical considerations is cardiovascular risk reduction, particularly in children with SLE and T1DM. Both conditions are associated with chronic inflammation, dyslipidemia, endothelial dysfunction, and increased oxidative stress, which collectively predispose affected children to premature atherosclerosis and significantly increase the risk of heart disease, often at a much younger age than in the general population[143]. In SLE, this is due to chronic inflammation, which accelerates atherosclerosis. In T1DM, it is a direct consequence of prolonged hyperglycemia and associated metabolic changes. Comorbidity prevention in these cases involves aggressive management of traditional cardiovascular risk factors, including regular lipid profile screening, blood pressure monitoring, and strict blood glucose monitoring[144]. For children and adolescents with these conditions, this may mean early and consistent monitoring, dietary interventions, and lifestyle modifications, emphasizing a healthy diet, exercise, and avoidance of smoking exposure to maintain a healthy weight and activity level. When indicated, pharmacologic interventions, such as statins or antihypertensives, may be warranted to further reduce long-term cardiovascular morbidity[145,146].

Another critical area is bone health monitoring, particularly for children on long-term steroid therapy for autoimmune conditions. While corticosteroids are highly effective in controlling inflammation in diseases such as JIA and lupus nephritis, their prolonged use can reduce bone mineral density, increasing the risk of osteoporosis and fractures. Prevention strategies include ensuring adequate calcium and vitamin D intake, regular weight-bearing exercise, and baseline and periodic bone density scans (e.g., dual-energy X-ray absorptiometry) to detect early signs of bone loss. In some cases, medication to protect bone density, such as bisphosphonate therapy, may be considered[5,147].

Additionally, comorbidity prevention should extend to metabolic monitoring (e.g., obesity and insulin resistance in patients on chronic immunosuppressants), infection surveillance (due to immunosuppression), and mental health support to address the psychological burden of chronic disease. These measures not only prevent secondary complications but also preserve growth, development, and quality of life in affected children[148]. By proactively addressing these and other comorbidities, tertiary prevention aims to improve not only the short-term symptoms of the autoimmune disease but also the child’s long-term health and well-being, ensuring the best possible outcomes as they transition into adulthood and ultimately reducing the cumulative burden of autoimmune diseases.

Psychosocial support

Psychosocial support is a critical but often underemphasized component of tertiary prevention in children with established autoimmune diseases. Beyond the physical burden of chronic illness, these children frequently encounter significant emotional and social challenges[149]. Regular hospital visits, invasive treatments, long-term medication use, and the unpredictability of disease flares can contribute to anxiety, depression, social withdrawal, and diminished self-esteem. For example, children with JIA may experience chronic pain and limited mobility that hinder participation in sports or social activities[150]. At the same time, those with T1DM face the ongoing stress of blood glucose monitoring and dietary vigilance - burdens that can feel isolating during adolescence. Similarly, SLE often brings periods of intense fatigue and visible side effects of therapy, adding to the psychological toll[151].

Early recognition and proactive management of these psychosocial concerns are essential, as mental well-being strongly influences treatment adherence, disease control, and long-term quality of life. Effective strategies include routine mental health screening and integrating psychologists, social workers, and school counselors into multidisciplinary care teams[152]. Targeted interventions may involve individual counseling to help children develop coping strategies and maintain self-esteem, family therapy to strengthen communication and reduce caregiver stress, and peer support groups to foster a sense of belonging through shared experiences. School-based support is equally important, ensuring accommodations that allow children to thrive academically and socially despite their health limitations[153].

In addition, resilience-building measures - such as cognitive behavioral therapy, mindfulness training, and structured stress-reduction programs - can equip children and families with lifelong tools to manage the unpredictability of chronic illness. Supporting parents and caregivers through education and counseling is equally vital, as caregiver well-being directly affects the child’s emotional adaptation[154]. Ultimately, addressing psychosocial health is not an optional adjunct but a cornerstone of tertiary prevention. By prioritizing mental health and resilience alongside medical treatment, healthcare providers can improve adherence, reduce disease-related distress, and enable children with autoimmune conditions to achieve their full developmental potential and a better quality of life[155].

Identifying a child as high-risk can trigger significant parental anxiety, particularly in mothers, and may lead to persistent worry about the unpredictability of disease onset. To mitigate these effects, clinical programs should implement various evidence-based strategies. Pre- and post-test counseling by multidisciplinary teams (including genetic counselors and pediatric specialists) is essential to correct common misconceptions about risk. Studies show that parents often struggle to distinguish between “risk” and “inevitability”; clear communication with visual aids can reduce this cognitive burden[156]. Implementing standardized tools, such as the GAD-7 (anxiety) or Hospital Anxiety and Depression Scale (anxiety/depression), allows for the early identification of parents who may be particularly vulnerable to “watchful waiting” stress. Interventions focused on enhancing parental resilience and tolerance for uncertainty are critical. Providing families with clear, actionable “red flag” symptoms and a concrete monitoring plan can shift the focus from passive worry to active, empowered surveillance[157]. For older children, the use of tailored resources - such as storybooks, videos, and child-free appointments for parents to discuss sensitive concerns - helps involve the child in a way that minimizes stress and fosters a sense of agency rather than victimhood[158].

CHALLENGES AND LIMITATIONS
Predictive limitations of genetic and antibody testing

One of the foremost challenges in the implementation of effective strategies for the early prevention and management of autoimmune diseases in high-risk children lies in the predictive limitations of genetic and antibody testing. While these diagnostic tools have advanced considerably in recent years, their clinical utility is not without significant constraints[10,159].

From a genetic standpoint, the identification of susceptibility loci, such as HLA haplotypes (e.g., HLA-DR3, HLA-DR4, HLA-DQ8), has dramatically enhanced our understanding of the heritable risk associated with autoimmune conditions, particularly T1DM, celiac disease, and autoimmune thyroiditis[160]. However, the presence of these alleles alone is not sufficient to reliably predict disease onset. Many individuals carrying these risk alleles remain healthy throughout their lifetime, underscoring the incomplete penetrance of genetic markers. This limitation is particularly evident in the polygenic nature of most autoimmune diseases, where multiple genetic variants of small effect interact in complex, often unpredictable ways with environmental exposures to drive disease expression[161]. Thus, while genetic testing can stratify individuals into higher- or lower-risk categories, it lacks the precision needed to determine who will ultimately progress to clinical disease and when.

Similarly, antibody-based screening, such as testing for islet autoantibodies (insulin autoantibodies, GAD65, IA-2, zinc transporter 8) in T1DM or for anti-TPO and anti-thyroglobulin antibodies in autoimmune thyroid disease, provides valuable insights into ongoing subclinical immune activity[162]. The detection of multiple autoantibodies, especially in young children, correlates strongly with an increased likelihood of progression to overt autoimmune disease[163]. Yet, antibody positivity is not synonymous with inevitable disease development. Some children may harbor autoantibodies for many years without ever transitioning to symptomatic disease, while others may progress rapidly within months of detection. This variability introduces considerable uncertainty, complicating the interpretation of results for both clinicians and families[164].

Another limitation is the dynamic nature of autoimmunity, where serological markers may appear and disappear over time. A child initially testing negative for autoantibodies may later develop them, and conversely, transient antibody positivity may not always lead to sustained autoimmunity. This instability poses challenges in establishing reliable screening intervals and highlights the inadequacy of a single test to capture the evolving trajectory of immune dysregulation[165,166].

The predictive shortcomings of both genetic and antibody testing also raise practical and ethical dilemmas. On the practical side, widespread population-based screening using these markers may result in a high number of false positives or inconclusive results, generating anxiety for families and unnecessary healthcare utilization[167]. Ethically, disclosing a child’s elevated risk of developing a potentially serious autoimmune condition - without the ability to offer a guaranteed preventive or curative intervention - may lead to psychological distress, stigma, and altered family dynamics. Parents may struggle with uncertainty, while children may internalize a sense of vulnerability long before disease onset[168].

Furthermore, the interpretation of predictive testing is highly context-dependent. Genetic and antibody markers may have varying predictive values depending on ethnicity, family history, and environmental exposures. What may be considered a strong predictor in one population may not carry the same weight in another, thereby limiting the generalizability of findings and necessitating region-specific validation of predictive algorithms[169].

In sum, while genetic and antibody testing represent essential tools for identifying children at increased risk of autoimmune disease, their limitations in sensitivity, specificity, temporal accuracy, and ethical implications remain significant barriers. These challenges underscore the need for more integrative predictive models that combine genetic, immunological, metabolic, microbiome, and environmental data to enhance precision. Until such advances are realized, reliance on current predictive tools must be tempered with caution, clear communication, and a holistic approach to counseling families about both the potential and the limitations of these tests.

Ethical issues in labeling high-risk children

One of the most significant challenges in the early identification and prevention of autoimmune diseases lies in the ethical considerations surrounding the labeling of children as “high-risk”[170]. Advances in genetic and immunologic testing have enabled the identification of children who carry susceptibility alleles or autoantibody profiles that increase their risk of developing autoimmune conditions such as T1DM, celiac disease, or SLE. While this knowledge holds tremendous potential to guide preventive strategies, it also raises profound ethical dilemmas regarding autonomy, stigmatization, psychological burden, and medical decision-making in a vulnerable population[171,172].

The labeling of asymptomatic children as “high-risk” must be grounded in established ethical frameworks, such as those provided by the American Academy of Pediatrics and the American College of Medical Genetics and Genomics. These organizations emphasize that the “best interest of the child” must be the primary consideration in any screening or testing program[173]. Current guidelines generally discourage predictive testing for adult-onset conditions to preserve the child’s right to decide for themselves upon reaching maturity[174]. However, for childhood-onset conditions like T1DM or celiac disease, testing is ethically permissible - and often recommended - if early identification leads to tangible clinical benefits, such as the prevention of diabetic ketoacidosis or growth failure[175]. Organizations like the International Society for Pediatric and Adolescent Diabetes provide rigorous clinical frameworks for monitoring children who test positive for autoantibodies (e.g., repeating tests in independent labs and structured metabolic monitoring), ensuring that the “high-risk” label translates into high-quality care rather than just psychological burden[176]. Ethical protocols must also respect parental rights to refuse screening after being fully informed of the benefits and risks, a principle upheld in international bioethics recommendations.

A primary concern is the potential psychological impact on both children and their families. Being labeled as “high-risk” can cause anticipatory anxiety, fear, and even feelings of helplessness, particularly when no definitive preventive intervention is yet available. For children, this label may influence self-identity and create an unnecessary sense of being “ill” despite being asymptomatic. For parents, it may foster overprotectiveness, guilt, or decisional conflict regarding interventions, surveillance, or lifestyle modifications. Such unintended psychosocial consequences can compromise overall well-being and quality of life, thereby negating some of the benefits of early risk identification[177].

Stigmatization and discrimination represent another ethical dimension. Knowledge of a child’s predisposition to autoimmune disease may inadvertently lead to differential treatment in educational, social, or even insurance contexts. Concerns exist that disclosure of genetic or immunologic risk information could affect insurability or lead to unfair categorization, particularly in societies with underdeveloped genetic privacy protections. These risks underscore the need for robust safeguards regarding confidentiality and data use[178].

Another layer of complexity lies in the ethical principle of autonomy. Children, by definition, lack full decision-making capacity, and the responsibility falls to parents or guardians to consent to genetic or autoantibody testing and subsequent preventive interventions. However, this creates tension between parental authority and the child’s evolving capacity for assent and future autonomy[179]. For example, a child may grow up resenting decisions made on their behalf regarding testing or interventions based on risk rather than certainty[180]. This raises critical questions about timing: Should testing be deferred until the child can participate in the decision, or should it be pursued early to maximize preventive opportunities?

Moreover, the principle of beneficence - acting in the best interest of the child - must be weighed against non-maleficence, the obligation to avoid harm. Without adequate, widely accepted preventive measures, labeling a child as high-risk may do more harm than good[180]. It can create a situation where families live with knowledge of a looming health risk but lack actionable steps to prevent disease onset. This dilemma highlights the ethical importance of linking predictive testing to meaningful clinical pathways, rather than offering risk information in isolation[181]. Finally, equity considerations must not be overlooked. Access to predictive testing and subsequent monitoring is not uniformly available, especially in low- and middle-income settings. Ethical concerns arise when only specific populations benefit from early identification and potential preventive trials, while others remain excluded. This disparity risks exacerbating health inequities across socioeconomic and geographic lines[167].

Consequently, labeling high-risk children presents a complex ethical landscape that demands careful navigation. It requires balancing the potential benefits of early identification with the risks of psychological harm, stigmatization, autonomy infringement, and inequity. Transparent communication, informed consent processes, psychosocial support systems, and strong confidentiality safeguards are essential to ensure that predictive testing is implemented in a manner that respects the dignity, rights, and well-being of children and their families. Therefore, addressing these ethical challenges requires careful communication, informed consent, and robust support systems to help families navigate the complex emotional and practical implications of a high-risk label. The benefits of early detection must be carefully weighed against the potential harm of the label itself.

Addressing health disparities and ensuring equity in precision prevention

The implementation of precision prevention strategies must be carefully managed to avoid widening existing health inequalities. Beyond the well-documented genomic data gap - where over 80% of genome-wide association studies participants are of European ancestry - broader structural and socioeconomic barriers present significant challenges to equitable care. For socioeconomically diverse populations, the high cost of multi-omic testing (genomics, metabolomics, microbiome) and the lack of insurance coverage for preventive screening are primary obstacles[181]. Furthermore, geographic disparities, such as the limited availability of specialized pediatric immunology clinics in rural or underserved areas, and a lack of transportation or health literacy, further hinder access. Precision prevention must integrate social determinants of health, as environmental exposures (e.g., pollution, food insecurity, chronic stress) are socially patterned and significantly influence the “first 1000 days”[182]. Risk models that rely solely on biological markers without accounting for these environmental contexts may fail to accurately predict disease in marginalized groups. To achieve equitable implementation, several key strategies are required. Utilizing global genomic initiatives like All of Us, H3Africa, and GenomeAsia 100K to improve the performance of PRS across diverse ancestries[183]. Developing affordable, point-of-care screening tools (e.g., microfluidic-based autoantibody assays) to reduce out-of-pocket costs for families. Restructuring reimbursement frameworks to include preventive precision screenings and fostering community partnerships to rebuild medical trust - addressing historical mistreatment that often leads to lower participation in research among marginalized groups[184]. Figure 12 shows a life-course integrated prevention framework for pediatric autoimmune diseases.

Figure 12
Figure 12  Life-course integrated prevention framework for pediatric autoimmune diseases. This schematic provides a consolidated overview of the four-tiered prevention framework - primordial, primary, secondary, and tertiary - applied across the pediatric life course to mitigate the development and progression of autoimmune diseases. Primordial prevention targets the general population during prenatal life and early childhood, focusing on immune system programming before disease risk is established. Interventions include maternal nutrition optimization, microbiome-supportive practices, avoidance of environmental toxins, and promotion of healthy early-life exposures. The expected outcome is resilient immune tolerance and reduced baseline autoimmune susceptibility. Primary prevention applies to genetically susceptible but asymptomatic children, identified by family history, high-risk human leukocyte antigen genotypes, or elevated polygenic risk scores. Strategies include lifestyle optimization, anti-inflammatory dietary patterns, vitamin D sufficiency, microbiome support, and environmental risk reduction, with the goal of preventing immune activation and autoantibody development. Secondary prevention focuses on individuals with preclinical autoimmunity, defined by the presence of disease-specific autoantibodies but preserved organ function. Interventions emphasize enhanced surveillance, targeted lifestyle interventions, and selected immune-modulating therapies where appropriate, aiming to delay or halt progression to clinical disease. Tertiary prevention applies to children with established autoimmune disease, where management strategies include disease-modifying therapies, complication prevention, psychosocial support, and long-term monitoring. The primary goal at this stage is preservation of organ function, reduction of disease burden, and optimization of quality of life. Together, this figure visually integrates prevention strategies across developmental stages, highlighting how timing, risk stratification, and intervention intensity determine outcomes in pediatric autoimmune diseases. HLA: Human leukocyte antigen; HbA1C: Glycated hemoglobin; T1DM: Type 1 diabetes mellitus.
Variability in environmental exposures and healthcare access

The progression from genetic susceptibility and autoantibody positivity to overt autoimmune disease is not uniform; it is shaped by a complex interplay of environmental exposures and healthcare access, both of which present significant challenges in preventive strategies for high-risk children[10]. Environmental factors - including infections, dietary habits, pollutant exposure, microbial diversity, and lifestyle practices - play a central role in immune system development and modulation of autoimmune risk. Yet, these exposures vary considerably across geographical regions, socioeconomic groups, cultural settings, and even between urban and rural environments[185,186]. For instance, children in industrialized countries may be more frequently exposed to air pollution and processed foods. In contrast, those in rural or resource-limited areas may experience recurrent infections or limited dietary diversity. Both extremes can disrupt immune tolerance and influence disease onset in distinct ways[187].

Adding to this complexity, the same environmental exposure does not have uniform effects across individuals. A viral infection, for example, may act as a potent trigger for TIDM in one genetically susceptible child while leaving another child with identical risk alleles unaffected[188]. Such variability makes it nearly impossible to design a universal prevention strategy. Instead, it underscores the importance of personalized approaches that consider each child’s unique combination of genetic risk, lifestyle, and environmental context[189].

Healthcare access further compounds these challenges. In many parts of the world, children at elevated autoimmune risk face barriers to timely screening, early diagnosis, and preventive care due to the scarcity of specialized pediatric and immunology services[190]. Even within well-resourced health systems, inequities persist: Families from lower socioeconomic backgrounds may encounter obstacles such as the high cost of genetic or antibody testing, limited access to multidisciplinary care, or inconsistent follow-up[191]. Conversely, children from more advantaged settings often benefit from advanced predictive tools, regular surveillance, and structured intervention programs that can meaningfully delay or mitigate disease progression[192].

This variability in both exposures and healthcare access complicates efforts to standardize preventive strategies. What is feasible and effective in one population may be unrealistic or unsustainable in another. Moreover, the uneven global distribution of resources risks widening health disparities, as children in underserved regions remain disproportionately vulnerable to late diagnosis and preventable complications[193]. Addressing these inequities requires more than biomedical advances - it calls for public health measures and policy reforms that promote equitable access, adapt interventions to local contexts, and target modifiable environmental risk factors.

Need for culturally adapted prevention strategies

One of the most persistent challenges in autoimmune disease prevention is the lack of culturally adapted strategies that account for diverse dietary habits, health beliefs, and social structures. While much of the evidence supporting prevention derives from studies in Western or other high-income countries, the findings are not always directly applicable to other populations with different cultural, genetic, and environmental backgrounds[194]. For example, recommendations around dietary modification, breastfeeding practices, or exposure to environmental antigens may not align with traditional lifestyles, religious practices, or socioeconomic realities in certain regions. Without careful adaptation, prevention programs risk poor compliance, miscommunication, or even mistrust among families[195].

Cultural context also plays a central role in shaping perceptions of risk and acceptance of preventive interventions. In some societies, health-seeking behavior is deeply influenced by family hierarchies, traditional medicine, or stigmatization of chronic illness[196]. Labeling a child as “high-risk” for autoimmune disease may be met with fear, denial, or resistance, especially when the proposed interventions conflict with cultural norms or when access to healthcare is already limited[197]. Furthermore, preventive strategies such as vaccination, dietary restrictions, or stress-reduction interventions may be interpreted differently across communities, leading to variable uptake and effectiveness[198].

The globalization of research has highlighted that prevention cannot follow a one-size-fits-all model. Instead, practical approaches must integrate evidence-based medicine with cultural sensitivity. This requires engaging local healthcare providers, community leaders, and families in the design and dissemination of interventions, ensuring that the recommendations are linguistically accessible, respectful of religious practices, and compatible with local diets and resources[199]. For instance, recommendations for increased vitamin D intake may need to be tailored differently for populations with limited sun exposure due to clothing practices or where fortified foods are not readily available. Similarly, guidance on reducing cardiovascular risk in children with autoimmune disease should consider local food availability and socioeconomic constraints[200].

In addition, cultural adaptation extends beyond education and into systemic healthcare delivery. Interventions must be feasible within the structure of local health systems, where access to specialized care, diagnostic testing, and preventive therapies may be limited. Strategies that work well in resource-rich environments may fail in low-resource settings unless they are simplified and made sustainable[201]. Ultimately, culturally adapted prevention requires ongoing dialogue among researchers, clinicians, and communities to ensure that strategies are both scientifically sound and socially acceptable. By aligning medical recommendations with cultural values and realities, the long-term goal of reducing complications of autoimmune disease becomes more attainable and equitable across global populations[202].

FUTURE DIRECTIONS
Precision prevention: Integrating PRSs and exposome data

The future of autoimmune disease prevention in high-risk children lies increasingly in the domain of precision medicine. Traditional prevention strategies often adopt a “one-size-fits-all” approach. Yet, the complexity of autoimmune disease etiology - shaped by genetic predisposition, environmental exposures, and individual lifestyle factors - demands a more tailored paradigm. Emerging tools such as PRS and comprehensive exposome profiling hold promise for advancing this shift toward precision prevention[203].

PRSs, which aggregate the cumulative effect of multiple genetic variants associated with autoimmune diseases, provide a quantifiable estimate of an individual’s inherited susceptibility. Unlike single-gene markers, PRS capture a broader genetic landscape, allowing clinicians to stratify children not only as “high-risk” or “low-risk” but also across a nuanced spectrum of susceptibility[204]. When applied early in life, these scores could guide decisions on monitoring intensity, the timing of preventive interventions, and the prioritization of resources for those most vulnerable.

Complementing PRS is the concept of the exposome, which encompasses the totality of environmental influences - ranging from infections, diet, pollutants, stress, and microbiome composition - that interact with the genome over time. By integrating exposome data with genetic risk, clinicians and researchers can begin to map gene-environment interactions with unprecedented precision[205]. For example, a child with a high PRS for T1DM but raised in an environment with controlled viral exposures, optimized vitamin D levels, and a healthy gut microbiome may follow a substantially different trajectory than a genetically similar child exposed to obesogenic diets and recurrent infections[206].

The integration of PRS and exposome data can enable predictive models that go beyond static risk assessment to dynamic, individualized risk trajectories. Machine learning algorithms and advanced bioinformatics are increasingly being developed to process these complex, multidimensional datasets, paving the way for real-time risk prediction and adaptive prevention strategies[207]. Such an approach could inform not only surveillance intensity but also the tailoring of interventions, including dietary modifications, vaccination schedules, and microbiome-targeted therapies. Figure 13 shows an example of an integrated model for autoimmune disease prevention.

Figure 13
Figure 13  Precision prevention of pediatric autoimmune disease: A multi-omic gene-environment risk stratification algorithm during early life. This figure illustrates a stepwise, integrative framework for the early identification and prevention of pediatric autoimmune diseases within the critical first 1000 days of life. Phase I (multi-omic data collection) integrates genetic susceptibility (human leukocyte antigen-DR/DQ haplotypes and genome-wide single-nucleotide polymorphism-based polygenic risk scores), longitudinal immune profiling through serial measurements of disease-specific autoantibodies (e.g., insulin autoantibody, glutamic acid decarboxylase 65, insulinoma-associated antigen 2, zinc transporter 8 for type 1 diabetes mellitus and tissue transglutaminase antibodies for celiac disease), and comprehensive exposome tracking derived from digital health records and environmental data, including mode of delivery, breastfeeding duration, antibiotic exposure, maternal nutrition, viral infection history, and air pollution exposure. Phase II (integrative analytics) applies feature engineering and machine-learning-based modeling to harmonize heterogeneous data streams and characterize dynamic gene-environment interactions, resulting in individualized estimates of autoimmune disease progression risk within a defined temporal window. Phase III (clinical decision support) translates quantified risk into actionable clinical pathways. Individuals are stratified into low-, moderate-, or high-risk categories, guiding tailored interventions ranging from routine pediatric care to enhanced immune surveillance, primordial preventive strategies (e.g., vitamin D optimization and microbiome support), or referral to specialized pediatric autoimmune centers for multidisciplinary monitoring, targeted immunomodulatory therapy, or enrollment in secondary prevention trials. Collectively, this algorithm operationalizes a precision prevention paradigm, emphasizing early-life timing as a critical determinant for intercepting autoimmune disease before the onset of clinical symptoms. HLA: Human leukocyte antigen; SNP: Single-nucleotide polymorphism; PRS: Polygenic risk score; IAA: Insulin autoantibody; T1DM: Type 1 diabetes mellitus; GAD: Glutamic acid decarboxylase 65; IA-2: Insulinoma-associated antigen 2; ZnTB: Zinc transporter; tTG: Tissue transglutaminase; ML: Machine learning; G × E: Gene-environment.

Despite this promise, several challenges remain before precision prevention can be widely implemented. The predictive accuracy of PRS across diverse populations remains limited, as most genomic data are derived from European-ancestry cohorts, which may restrict its applicability in other ethnic groups[208]. Similarly, exposome data collection requires standardized methodologies, longitudinal monitoring, and the integration of wearable technologies, all of which raise feasibility and cost concerns. Moreover, ethical considerations - including the handling of sensitive genetic information, parental consent, and the potential for medical over-surveillance - must be carefully addressed[209].

The convergence of polygenic risk scoring and exposome science offers a transformative vision for the future of autoimmune disease prevention in children. By moving from broad population-level recommendations to individualized risk-adapted strategies, precision prevention has the potential to optimize outcomes, reduce unnecessary interventions, and empower families with actionable knowledge[210]. However, rigorous validation, equitable implementation, and ethical frameworks will be essential to translate this vision into clinical practice.

Next-generation probiotics and microbiota transplants

Emerging therapeutic approaches are increasingly focused on modulating the gut microbiome to prevent or delay the onset of autoimmune diseases in genetically susceptible children. Traditional probiotics, while beneficial in some contexts, have shown inconsistent results due to strain variability, dosage challenges, and limited colonization potential[211]. This has driven interest toward next-generation probiotics - engineered or naturally occurring strains with more targeted immunomodulatory properties. They are emerging as a promising strategy for the prevention and management of autoimmune disorders, moving beyond traditional probiotic strains such as Lactobacillus and Bifidobacterium[212]. These novel probiotics include rationally selected commensal bacteria, such as Akkermansia muciniphila, Faecalibacterium prausnitzii, and Clostridium clusters IV and XIVa, which have demonstrated strong immunomodulatory and anti-inflammatory properties in preclinical and early clinical studies[213]. Unlike conventional probiotics, next-generation strains (Table 4) are selected for their ability to restore immune tolerance, regulate T-cell balance, and promote the production of beneficial metabolites, such as short-chain fatty acids, that strengthen the intestinal barrier and reduce systemic inflammation[214]. For example, Akkermansia muciniphila has been shown to enhance mucosal integrity. At the same time, Faecalibacterium prausnitzii is linked to the suppression of pro-inflammatory cytokines, both of which are relevant in conditions such as T1DM, IBD, and multiple sclerosis. Although the therapeutic potential is promising, the clinical translation of next-generation probiotics is still limited by challenges such as strain-specific effects, safety concerns, regulatory approval, and the need for personalized approaches that account for host genetics, microbiome composition, and environmental exposures[215]. Nevertheless, with advances in metagenomics, synthetic biology, and precision medicine, next-generation probiotics represent a transformative frontier in the prevention and treatment of autoimmune diseases.

Table 4 Candidate next-generation probiotics and their potential role in autoimmune disease prevention.
Candidate NGP
Key mechanism(s)
Relevance to autoimmune diseases
Akkermansia muciniphilaEnhances gut barrier integrity, increases mucin production, modulates Treg/Th17 balanceAssociated with reduced inflammation; protective role in type 1 diabetes and multiple sclerosis models
Faecalibacterium prausnitziiProduces butyrate (short-chain fatty acid), exerts anti-inflammatory effects via IL-10 induction and NF-κB inhibitionLower abundance linked with IBD and rheumatoid arthritis; supplementation may restore tolerance
Bacteroides fragilis (polysaccharide A strain)Promotes Treg differentiation and reduces pro-inflammatory cytokinesShown to prevent colitis and experimental autoimmune encephalomyelitis in animal models
Roseburia speciesButyrate production strengthens the epithelial barrier and suppresses pro-inflammatory pathwaysReduced levels observed in IBD and type 1 diabetes; potential for restoring immune tolerance
Clostridium clusters IV and XIVaInduce colonic Treg expansion, short-chain fatty acids productionProtective in colitis and systemic autoimmune models; contributes to mucosal immune balance
Prevotella histicolaModulates dendritic cells and T cell responses, decreasing pro-inflammatory Th1/Th17 cellsDemonstrated efficacy in reducing MS-like symptoms in experimental models
Escherichia coli Nissle 1917 (engineered forms)Enhances epithelial barrier, modulates innate immunity, and can be engineered for anti-inflammatory metabolite productionShown protective effects in IBD; engineered strains under study for systemic autoimmunity

Similarly, microbiota-based therapies, such as FMT, are being explored to restore microbial diversity and resilience in high-risk children. This procedure involves transferring a fecal sample from a healthy donor into the recipient’s gut to restore a balanced microbial community. While currently approved in some countries only for the treatment of Clostridioides difficile infection, FMT is being investigated for its potential to treat or prevent autoimmune conditions like IBD. Although still experimental in pediatrics, early data suggest that carefully screened and standardized FMT preparations may reestablish immune tolerance and reduce the risk of autoimmunity by reshaping the gut ecosystem[213,216].

These advanced strategies represent a shift towards precise, biologically targeted therapies. Instead of broad-spectrum interventions, future treatments will likely focus on a personalized approach to rebuild a resilient and diverse microbiome, thereby preventing or managing autoimmune diseases. However, several challenges remain, including safety concerns, donor variability, long-term stability of microbial engraftment, and ethical considerations regarding the application of such interventions in otherwise healthy but genetically predisposed children. To advance these therapies, rigorous clinical trials, standardized protocols, and culturally acceptable delivery models are needed. Ultimately, integrating next-generation probiotics and microbiota transplants into prevention strategies could provide a robust, personalized approach to reducing autoimmune disease burden in future generations.

Preventive vaccines for infections linked to autoimmunity

Viral infections are known environmental triggers of autoimmune diseases, either by initiating immune dysregulation or by perpetuating chronic inflammation. This has led to the development of a promising new strategy called immunoprevention, which uses preventive vaccines to eliminate these infectious triggers in genetically susceptible individuals[217]. While no vaccine is currently approved specifically to prevent an autoimmune disease, this approach aims to prevent the “environmental spark” from igniting an autoimmune response. The relationship between vaccines and autoimmunity is complex; some vaccines are being investigated for their potential to reduce autoimmune risk, while the vast majority have no effect, and a minimal number have been linked to a theoretical increase in autoimmune risk (Table 5)[218]. The current focus is on developing vaccines to prevent infections strongly associated with certain autoimmune conditions.

Table 5 Licensed and candidate vaccines: Direction of effect on autoimmune disease risk, rare signals, and evidence type.
Vaccine
Target infection(s)
Direction of effect on autoimmune risk (population level)
Notable autoimmune-type adverse events (rare)
Evidence type/key findings
RotavirusRotavirus gastroenteritisPossible decrease in T1DM incidence in some large cohorts, while others report a neutral effectNo consistent autoimmune signal has been demonstratedLarge administrative and time-series cohort studies have yielded mixed results; some show a modest (approximately 33%) reduction in T1DM risk following a complete vaccine series in specific cohorts
MMRMeasles, mumps, rubellaNeutral. No proven increase in the risk of chronic autoimmune diseasesImmune thrombocytopenic purpura has a very rare association (approximately 1 per 40000 doses), which is typically self-limited. The risk of neurological complications from measles infection is far higherDecades of evidence from large case-control studies, active surveillance systems, and analyses by advisory committees (e.g., ACIP)
Hepatitis BHepatitis B virusNeutral. No increase in the incidence of multiple sclerosis or other autoimmune diseasesNo consistently demonstrated autoimmune-type adverse eventsLarge nested case-control studies and cohort studies, including a landmark study published in the New England Journal of Medicine, have shown no association with MS
Meningococcal conjugateNeisseria meningitidisNeutral. No increased risk of autoimmune diseasesNo causal link to GBS has been found in large cohort studies, despite initial post-licensure signalsExtensive pharmacoepidemiology and record-validated cohort studies have provided a reassuring safety profile
Pneumococcal (PCV13, PPSV23)Streptococcus pneumoniaeNeutral. No increased risk of autoimmune diseasesNone consistently demonstratedLarge-scale safety studies and post-licensure surveillance have found no association with autoimmune conditions
Varicella (chickenpox)Varicella-zoster virusNeutral. No increased risk of autoimmune diseasesVery rare cases of vasculitis or arthritis have been reported, but a causal link has not been established. The risk of these conditions from natural infection is higherExtensive safety data from clinical trials and post-licensure surveillance systems
HPVHuman papillomavirusNeutral. No increase in autoimmune diseases, including MS, IBD, and SLE, has been foundVery rare cases of GBS have been observed in some post-licensure analyses, but overall rates are not elevated compared to the background populationExtensive multinational cohort studies, case-control studies, and national surveillance registries have consistently shown a reassuring safety profile with no causal link
Influenza (seasonal)Influenza A and B virusesNeutral. Prevention of influenza infection significantly reduces the risk of post-infectious autoimmune complicationsGBS is a very rare adverse event, with an estimated risk of approximately 1-2 cases per million doses, which is lower than the risk of GBS from influenza infection itselfEvidence from meta-analyses of randomized trials, large-scale surveillance data (e.g., from the CDC), and national cohorts
COVID-19 mRNASARS-CoV-2Neutral. No signal for chronic autoimmune disease; preventing infection reduces post-infectious autoimmunityMyocarditis/pericarditis is a rare, typically mild adverse event, with the highest risk observed in adolescent and young adult males, particularly after the second dose. The risk of these conditions from COVID-19 infection itself is significantly higherNational surveillance (CDC’s V-safe and VAERS), international cohorts, and analyses published in reputable journals like JAMA have characterized these rare events
(Future) EBV vaccineEBVPotential decrease (hypothesized). Strong potential to reduce the incidence of MS and other EBV-linked autoimmune diseasesN/A; no licensed product available yetEvidence is based on strong epidemiological and mechanistic links between EBV infection and autoimmune diseases; multiple vaccine platforms are currently in development
(Future) T1DM vaccineN/A (Immunomodulatory)Potential decrease (hypothesized). Aims to induce immune tolerance to prevent the autoimmune attack on the pancreasN/A; no licensed product available yetMultiple clinical trials are underway for both oral and parenteral immunomodulatory vaccines; early results for oral insulin and other agents have shown promise in delaying disease progression

Several viruses and bacteria have been identified as potential triggers of autoimmune conditions through mechanisms such as molecular mimicry, in which a pathogen’s proteins closely resemble the body’s own proteins, prompting the immune system to attack healthy tissue mistakenly[219]. One prime example is Coxsackievirus B, a member of the enterovirus family, which has been strongly linked to the development of T1DM. These viruses can infect the pancreatic beta cells, leading to inflammation and subsequent autoimmune destruction. The development of a vaccine that prevents common enteroviral infections could, in theory, eliminate this trigger in at-risk children, thereby reducing the incidence of T1DM[220].

Another example is the Epstein-Barr virus (EBV), a ubiquitous herpesvirus that has been consistently associated with an increased risk of multiple sclerosis and SLE. While the exact mechanism is complex, EBV infection is believed to activate specific immune cells and contribute to the breach of self-tolerance[221,222]. The development of a prophylactic EBV vaccine, which is currently in clinical trials, could be a game-changer in preventing these and other EBV-associated autoimmune diseases[223]. In addition to EBV, other pathogens such as Helicobacter pylori and human herpesvirus 6 have been investigated for their potential roles in autoimmune pathogenesis, highlighting the broader relevance of pathogen-targeted prevention strategies[224].

The use of preventive vaccines for autoimmunity is a paradigm shift. Unlike traditional vaccines that aim to prevent a disease in a whole population, these vaccines would be particularly critical for targeted groups, such as children with a strong family history of a specific autoimmune disorder[218]. However, long-term studies are needed to establish whether preventing infections translates into measurable reductions in the incidence of autoimmune disease and to ensure safety in populations with a genetic predisposition to immune dysregulation. While challenges remain, including establishing a causal link between the infection and the autoimmune disease, this approach represents a powerful and practical avenue for preventing the development of these chronic conditions.

Personalized nutrition guided by metabolomics and microbiome profiling

The future of autoimmune disease prevention is moving beyond generic dietary advice towards highly personalized nutritional strategies. This approach, known as personalized nutrition, uses advanced technologies such as metabolomics and microbiome profiling to create a diet tailored to an individual’s unique biological needs[225].

Metabolomics is the large-scale study of small molecules, or metabolites, within a biological system. These metabolites are the end products of metabolic processes and are influenced by a combination of a person’s genetics, diet, and lifestyle[226]. By analyzing a child’s metabolomic profile, clinicians can gain insights into their specific inflammatory pathways, nutrient deficiencies, and metabolic imbalances. For example, a metabolomics screen might reveal a low level of anti-inflammatory metabolites or a high level of pro-inflammatory compounds, providing a precise target for dietary intervention[227].

Microbiome profiling involves sequencing the genetic material of the microorganisms in a person’s gut to identify the specific bacterial species present and their relative abundance. A healthy microbiome is rich in diverse, beneficial bacteria, while a state of dysbiosis - an imbalance in the microbial community - is often linked to autoimmune risk[228]. By understanding a child’s unique microbial landscape, nutritionists can recommend specific prebiotics (fibers that feed beneficial bacteria) and probiotics to correct imbalances and foster a gut environment that supports immune tolerance[229].

By combining metabolomics and microbiome profiling data, clinicians can move beyond generalized recommendations toward a precision nutrition approach. For instance, a child with a genetic risk for IBD might have a metabolomic profile showing a low level of the anti-inflammatory metabolite butyrate[230]. Simultaneously, their microbiome profile might show a low abundance of the bacteria that produce this metabolite. This combined data would lead to a targeted dietary plan rich in specific fibers and possibly a next-generation probiotic supplement to correct both the microbial and metabolic deficiencies, thereby reducing their risk of disease. This innovative approach promises to make dietary interventions a more powerful, evidence-based tool for preventing autoimmune disease[231].

STUDY LIMITATIONS AND CHALLENGES

While this review provides a comprehensive framework for prevention, several significant challenges and limitations must be acknowledged. First, a significant challenge in synthesizing a global framework for prevention is the variability in the quality of epidemiological data. The rising incidence rates cited throughout this review must be interpreted within the context of changing medical practices. Specifically, ‘diagnostic drift’ - where improved screening protocols identify milder or subclinical cases that might have previously gone undetected - can lead to an apparent increase in disease prevalence. Furthermore, many of the landmark studies that form the basis of our understanding of pediatric autoimmunity (e.g., The Environmental Determinants of Diabetes in the Young, Pre-POINT) are susceptible to selection bias, as they typically involve highly motivated families or specific genetic subgroups. A more balanced assessment of these trends acknowledges that while the environmental impact is undeniable, the absolute rate of increase is subject to measurement error and ascertainment bias. Future research should prioritize standardized, population-based registries in diverse global settings to confirm these trends with greater certainty.

Second, the field of personalized prevention is nascent, and the long-term efficacy of many proposed interventions remains unproven. Much of the data is from observational studies or small-scale clinical trials, necessitating large randomized controlled trials to establish causality. Third, implementing such strategies faces major logistical and ethical hurdles. Widespread screening for preclinical biomarkers is costly and requires careful consideration of the psychosocial impact of labeling an asymptomatic child as “pre-symptomatic”. The real-world application of complex dietary, lifestyle, or microbial interventions can be challenging, as they require significant family commitment and financial resources. Fourth, the majority of research has focused on specific autoimmune diseases (e.g., T1DM and celiac disease), and more evidence is needed to apply these concepts to other conditions, such as JIA or lupus. Finally, the actual impact of this precision medicine approach will not be known until long-term follow-up studies can track disease trajectories over decades, a process that is both resource-intensive and complex to sustain.

RECOMMENDATIONS

Based on the integrated framework for preventing pediatric autoimmune diseases, a proactive approach is recommended across multiple domains. Clinicians should adopt a prevention-focused mindset, stay informed about emerging biomarkers, and engage in collaborative, multidisciplinary care models. For researchers, a priority is to conduct large-scale randomized controlled trials to validate the efficacy of preventive interventions and to develop non-invasive methods to assess the exposome. Researchers must also investigate the long-term ethical and psychosocial impacts of labeling children as high-risk. Finally, public health officials should develop and implement policies that promote early-life health, ensuring equitable access to care and to research funding. This collective effort is essential to translating scientific advancements into effective public health strategies to reduce the global burden of pediatric autoimmunity.

CONCLUSION

The rising incidence of pediatric autoimmune diseases demands a fundamental shift in medical strategy - from reacting to managing established diseases to proactively preventing it. This review provides a robust framework that integrates genetic, environmental, and immunological data to identify at-risk children and offers a tiered intervention approach. The core of this model rests on a multi-pronged strategy that begins with primordial prevention in the critical “first 1000 days” and extends to primary, secondary, and tertiary prevention. By leveraging advances in genomics, exposomics, and targeted immunotherapies such as teplizumab, we are moving closer to a future in which autoimmune diseases may be preventable rather than merely manageable. This comprehensive approach provides a roadmap for clinicians, researchers, and public health officials, offering a new path to combat the global burden of pediatric autoimmunity by altering disease trajectories and improving long-term health outcomes for the next generation.

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Footnotes

Peer review: Externally peer reviewed.

Peer-review model: Single blind

Specialty type: Pediatrics

Country of origin: Egypt

Peer-review report’s classification

Scientific quality: Grade B

Novelty: Grade A

Creativity or innovation: Grade B

Scientific significance: Grade A

P-Reviewer: Liu L, MD, PhD, Associate Professor, Principal Investigator, China S-Editor: Hu XY L-Editor: A P-Editor: Zheng XM

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