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Mäenpää H, Ojala T, Tainio J, Arokoski J, Jahnukainen T. Utility of the 6-Min Walk Test for Assessing Physical Performance in Pediatric Heart Transplant Recipients. Clin Transplant 2025; 39:e70061. [PMID: 39832191 PMCID: PMC11745299 DOI: 10.1111/ctr.70061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2025]
Abstract
BACKGROUND Physical performance capacity (PPC) of pediatric heart transplant (HT) recipients is reportedly low to normal, and longitudinal follow-up of these patients is recommended. However, no recommendation for a follow-up method is available. In this study, the correlation between the 6-min walk test (6MWT), various clinical parameters, and a physical performance test set was evaluated to develop a simple follow-up tool for PPC. METHODS Fifteen pediatric HT patients and 392 historical controls were tested at a median age of 15.4 years. PPC was tested with a 6MWT and a physical performance test set consisting of six different components assessing muscle endurance, strength, speed, and flexibility. RESULTS Controls outperformed recipients across all test domains except the leg lift and sit-and-reach test. The 6MWT distance correlated well with the physical performance test set results; the correlations were with leg lift (rs = 0.622, p = <0.05), repeated squatting (rs = 0.851, p = <0.001, sit-up (rs = 0.738, p = <0.05), back extension (rs = 0.747, p ≤ 0.001), and total physical performance capacity (rs = 0.873, p = <0.001). Indexed 6MWT results or total physical performance capacity set had no statistically significant associations with any of the clinical parameters tested. CONCLUSION Our study supports recent findings suggesting that the 6MWT is a suitable method for longitudinal follow-up in children with HT. We recommend performing the 6MWT annually in these patients, to be used to motivate and encourage them to enhance their physical activity.
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Affiliation(s)
- Heidi Mäenpää
- Department of Rehabilitation, New Children's HospitalHelsinki University HospitalHelsinki, Finland and University of HelsinkiHelsinkiFinland
| | - Tiina Ojala
- Department of Pediatric CardiologyNew Children's HospitalHelsinki University HospitalHelsinki, Finland and University of HelsinkiHelsinkiFinland
| | - Juuso Tainio
- Department of Pediatric Nephrology and TransplantationNew Children's HospitalHelsinki University HospitalHelsinki, Finland and University of HelsinkiHelsinkiFinland
| | - Jari Arokoski
- Department of Physical and Rehabilitation MedicineHelsinki University HospitalHelsinki, Finland and University of HelsinkiHelsinkiFinland
| | - Timo Jahnukainen
- Department of Pediatric Nephrology and TransplantationNew Children's HospitalHelsinki University HospitalHelsinki, Finland and University of HelsinkiHelsinkiFinland
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Jiang C, Yan X, Xia P, Luo X, Zheng H, Tong H, Liu Y, Zhu H, Xu P, Wang J. Case report and literature review: management of Paxlovid (nirmatrelvir/ritonavir)-induced acute tacrolimus toxicity in a patient with systemic lupus erythematosus. Front Pharmacol 2024; 15:1364121. [PMID: 38962309 PMCID: PMC11220238 DOI: 10.3389/fphar.2024.1364121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 05/20/2024] [Indexed: 07/05/2024] Open
Abstract
Despite the availability of effective vaccines and treatments for SARS-CoV-2, managing COVID-19 in patients with systemic lupus erythematosus (SLE) remains challenging, particularly considering drug-drug interactions (DDIs). Here, we present a case of DDIs between Tacrolimus (Tac) and nirmatrelvir/ritonavir (NMV/r) in a 32-year-old male with SLE. Following self-administration of NMV/r and resumption of Tac after 5 days, the patient experienced acute nephrotoxicity and neurotoxicity, accompanied by supratherapeutic Tac levels, despite Tac being withheld during NMV/r. The primary cause of this acute toxicity is attributed to ritonavir's inhibitory effect on both CYP3A4 enzymes and P-glycoprotein. Upon admission, Tac was discontinued, and supportive therapies were initiated. Phenytoin, a CYP3A4 inducer, was administered to lower Tac levels under the guidance of clinical pharmacists, effectively alleviating the patient's acute toxic symptoms. The half-life of Tac during the treatment of phenytoin was calculated to be 55.87 h. And no adverse reactions to phenytoin were observed. This case underscores the persistence of enzyme inhibition effects and demonstrates the effectiveness and safety of utilizing CYP3A4 enzyme inducers to mitigate Tac concentrations. Furthermore, it emphasizes the importance of healthcare providers and patients being vigilant about DDIs in Tac recipients. Lastly, it highlights the indispensable role of pharmacist involvement in clinical decision-making and close monitoring in complex clinical scenarios. Although our findings are based on a single case, they align with current knowledge and suggest the potential of individualized combination therapy in managing challenging COVID-19 cases in immunocompromised patients.
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Affiliation(s)
- Chenxiao Jiang
- Department of Pharmacy, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Xiaodi Yan
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, China
| | - Peng Xia
- Department of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xuemei Luo
- Department of Pharmacy, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Haoyue Zheng
- Women’s Hospital of Nanjing Medical University, Nanjing Women and Children’s Healthcare Hospital, Nanjing, China
| | - Hanwen Tong
- Department of Emergency Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Yun Liu
- Department of Emergency Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Huaijun Zhu
- Department of Pharmacy, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Peng Xu
- Department of Emergency Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Jun Wang
- Department of Emergency Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, China
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Lei CL, Gui XL, Wang LY, Guo YJ, Li Y. Analysis of drug-induced posterior reversible encephalopathy syndrome using the food and drug administration adverse drug events reporting system database. Expert Opin Drug Saf 2024; 23:607-616. [PMID: 38478961 DOI: 10.1080/14740338.2024.2327510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 01/03/2024] [Indexed: 05/12/2024]
Abstract
OBJECTIVE In this retrospective pharmacovigilance study, we gathered data on drug-induced posterior reversible encephalopathy syndrome (PRES). Our goal was to identify the primary suspect drugs in PRES by analyzing the Food and Drug Administration Adverse Events Reporting System (FAERS) database. METHODS We identified and analyzed reports of PRES listed in the FAERS database between 2004 and 2021. Using the reporting odds ratio and 95% confidence interval, we evaluated the safety signals for each of the drugs associated with PRES. RESULTS We reviewed 11,077 reports of adverse events corresponding to PRES. The primary suspect drug categories were antineoplastics, immunosuppressants, and glucocorticoids. PRES was 24.77% more likely to occur in females than in males. Drug-induced PRES usually occurs in individuals with cancer, those who have undergone an organ/stem cell transplant, and those with autoimmune conditions. CONCLUSION Our results show that the drugs most commonly suspected to cause PRES were antineoplastics, immunosuppressants, and glucocorticoids. Future studies are needed to illuminate the pathophysiological alterations that underlie PRES. In the meantime, prescribers and patients should be made aware of the potential risks of PRES associated with pharmaceutical therapy, and the summaries of product characteristics for individual drugs should be updated to include this information.
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Affiliation(s)
- Cai-Lu Lei
- Department of Pharmacy, Guangxi Medical University Cancer Hospital, Nanning, China
- School of Pharmaceutical Science, Guangxi Medical University, Nanning, China
| | - Xiao-Long Gui
- Department of Gastrointestinal & Gland Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Lin-Yu Wang
- Department of Pharmacy, Guangxi Medical University Cancer Hospital, Nanning, China
| | - You-Jia Guo
- Department of Pharmacy, Guangxi Medical University Cancer Hospital, Nanning, China
| | - Yan Li
- Department of Pharmacy, Guangxi Medical University Cancer Hospital, Nanning, China
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4
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Giral M, Grimbert P, Morin B, Bouvier N, Buchler M, Dantal J, Garrigue V, Bertrand D, Kamar N, Malvezzi P, Moreau K, Athea Y, Le Meur Y. Impact of Switching From Immediate- or Prolonged-Release to Once-Daily Extended-Release Tacrolimus (LCPT) on Tremor in Stable Kidney Transplant Recipients: The Observational ELIT Study. Transpl Int 2024; 37:11571. [PMID: 38694490 PMCID: PMC11061389 DOI: 10.3389/ti.2024.11571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 01/31/2024] [Indexed: 05/04/2024]
Abstract
Once-daily extended-release tacrolimus (LCPT) exhibits increased bioavailability versus immediate-release (IR-TAC) and prolonged release (PR-TAC) tacrolimus. Improvements in tremor were previously reported in a limited number of kidney transplant patients who switched to LCPT. We conducted a non-interventional, non-randomized, uncontrolled, longitudinal, prospective, multicenter study to assess the impact of switching to LCPT on tremor and quality of life (QoL) in a larger population of stable kidney transplant patients. The primary endpoint was change in The Essential Tremor Rating Assessment Scale (TETRAS) score; secondary endpoints included 12-item Short Form Survey (SF-12) scores, tacrolimus trough concentrations, neurologic symptoms, and safety assessments. Subgroup analyses were conducted to assess change in TETRAS score and tacrolimus trough concentration/dose (C0/D) ratio by prior tacrolimus formulation and tacrolimus metabolizer status. Among 221 patients, the mean decrease of TETRAS score after switch to LCPT was statistically significant (p < 0.0001 vs. baseline). There was no statistically significant difference in change in TETRAS score after switch to LCPT between patients who had received IR-TAC and those who had received PR-TAC before switch, or between fast and slow metabolizers of tacrolimus. The overall increase of C0/D ratio post-switch to LCPT was statistically significant (p < 0.0001) and from baseline to either M1 or M3 (both p < 0.0001) in the mITT population and in all subgroups. In the fast metabolizers group, the C0/D ratio crossed over the threshold of 1.05 ng/mL/mg after the switch to LCPT. Other neurologic symptoms tended to improve, and the SF-12 mental component summary score improved significantly. No new safety concerns were evident. In this observational study, all patients had a significant improvement of tremor, QoL and C0/D ratio post-switch to LCPT irrespective of the previous tacrolimus formulation administered (IR-TAC or PR-TAC) and irrespective from their metabolism status (fast or slow metabolizers).
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Affiliation(s)
| | | | | | | | | | | | | | | | - Nassim Kamar
- CHU Toulouse, Université Paul Sabatier Toulouse III, Toulouse, France
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Olmedo‐Saura G, Pérez‐Pérez J, Xuclà‐Ferrarons T, Collet R, Martínez‐Viguera A, Kulisevsky J. Cerebellar Syndrome Induced by Hypomagnesemia: A Treatable Cause of Ataxia Not to be Missed. Report of Three Cases and a Review of the Literature. Mov Disord Clin Pract 2023; 10:1004-1012. [PMID: 37332648 PMCID: PMC10272920 DOI: 10.1002/mdc3.13739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/02/2023] [Accepted: 03/23/2023] [Indexed: 10/06/2023] Open
Abstract
Background Magnesium is an important intracellular cation involved in essential enzymatic reactions. It is necessary for neuronal function and its depletion can produce neurological symptoms such as cramps or seizures. Clinical consequences of its deficit in the cerebellum are less known and the diagnosis can be delayed because of the lack of awareness on this condition. Cases We present three cases of cerebellar syndrome (CS) due to hypomagnesemia: A midline CS with myoclonus and ocular flutter and two cases of hemispheric CS, one of them entailed a Schmahmann's syndrome and the other suffered a seizure. MRI findings revealed cerebellar vasogenic edema and the symptoms improved after magnesium replacement in all cases. Literature Review We reviewed 22 cases of CS due to hypomagnesemia, all with subacute onset (days to weeks). Encephalopathy and/or epileptic seizures were common. MRI findings were vasogenic edema involving the cerebellar hemispheres, the vermis, or the nodule. Up to 50% of patients presented hypocalcemia and/or hypokalemia. All the patients showed symptomatic improvement after magnesium replacement, but 50% showed significant sequelae, and 46% relapsed. Conclusions Hypomagnesaemia should always be considered in the differential diagnosis of CS as it has a potential treatment, and its early recognition can avoid recurrences and permanent cerebellar impairment.
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Affiliation(s)
| | - Jesús Pérez‐Pérez
- Movement Disorders Unit, Neurology DepartmentSant Pau HospitalBarcelonaSpain
- Department of MedicineBarcelona Autonomous UniversityBarcelonaSpain
- Movement Disorders GroupBiomedical Research Institute‐Sant PauBarcelonaSpain
- Network Research Center‐Neurodegenerative Diseases (CIBERNED)MadridSpain
| | | | - Roger Collet
- Movement Disorders Unit, Neurology DepartmentSant Pau HospitalBarcelonaSpain
| | | | - Jaime Kulisevsky
- Movement Disorders Unit, Neurology DepartmentSant Pau HospitalBarcelonaSpain
- Department of MedicineBarcelona Autonomous UniversityBarcelonaSpain
- Movement Disorders GroupBiomedical Research Institute‐Sant PauBarcelonaSpain
- Network Research Center‐Neurodegenerative Diseases (CIBERNED)MadridSpain
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Fuochi E, Anastasio L, Lynch EN, Campani C, Dragoni G, Milani S, Galli A, Innocenti T. Main factors influencing long-term outcomes of liver transplantation in 2022. World J Hepatol 2023; 15:321-352. [PMID: 37034235 PMCID: PMC10075010 DOI: 10.4254/wjh.v15.i3.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/24/2022] [Accepted: 02/22/2023] [Indexed: 04/11/2023] Open
Abstract
Liver transplant (LT) outcomes have markedly improved in the recent decades, even if long-term morbidity and mortality are still considerable. Most of late deaths are independent from graft function and different comorbidities, including complications of metabolic syndrome and de novo neoplasms, seem to play a key role in determining long-term outcomes in LT recipients. This review discusses the main factors associated with late mortality and suggests possible strategies to improve long-term management and follow-up after liver transplantation. In particular, the reduction of drug toxicity, the use of tools to identify high-risk patients, and setting up a multidisciplinary team also for long-term management of LT recipients may further improve survival after liver transplantation.
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Affiliation(s)
- Elisa Fuochi
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
| | - Lorenzo Anastasio
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
| | - Erica Nicola Lynch
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
| | - Claudia Campani
- Department of Experimental and Clinical Medicine, University of Florence, Florence 50134, Italy
| | - Gabriele Dragoni
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
- Department of Medical Biotechnologies, University of Siena, Siena 53100, Italy
| | - Stefano Milani
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
| | - Andrea Galli
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
| | - Tommaso Innocenti
- Gastroenterology Research Unit, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence 50134, Italy
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Zhang G, Duan B, Li G. mTORi-based immunosuppression reduces HCC recurrence at the expense of increased adverse side effects: A systematic review and meta-analysis. Clin Transplant 2022; 36:e14823. [PMID: 36124430 DOI: 10.1111/ctr.14823] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 08/13/2022] [Accepted: 09/10/2022] [Indexed: 12/27/2022]
Abstract
Sirolimus and everolimus are mammalian target of rapamycin inhibitors (mTORi) that can reduce relapse rates following liver transplantation (LT) for hepatocellular carcinoma (HCC). Herein, we performed a systematic review and meta-analysis to investigate the efficacy of mTORi and calcineurin inhibitors (CNI) in reducing HCC recurrence and survival adverse effects (AEs) in HCC patients after LT. Systematic literature searches were conducted using MEDLINE, EMBASE, and Cochrane Library databases up to October 2021. The primary outcomes of interest were tumor recurrence rates and overall survival. The secondary outcomes were the characterization and incidence of AEs. A total of 38 trials involving 10,607 participants was included in the analysis. The incidence of recurrence and overall mortality was significantly lower in the mTORi than in the CNI group (relative ratio [RR]: .78, 95% confidence interval [CI]: .68-.89 and RR: .76, 95% CI: .67-.86, respectively). The incidence of some AEs and complications such as acne, anemia, abnormal healing, dyslipidemia, depression, diarrhea, edema, headache/migraine, hypercholesterolemia, incisional hernia, infection, leukopenia, mouth ulceration, pyrexia, proteinuria, pruritis, rash, and thrombocytopenia were higher in the mTORi than in the CNI group. mTORi reduced the recurrence incidence and overall 5-year mortality rate but increased many other incidences of AEs compared with that by CNI. Therefore, clinicians should be aware of the risks and benefits of mTORi use when managing patients undergoing LT for HCC.
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Affiliation(s)
- Gongming Zhang
- Beijing You'an Hospital, Capital Medical University, Beijing, China
| | - Binwei Duan
- Beijing You'an Hospital, Capital Medical University, Beijing, China
| | - Guangming Li
- Beijing You'an Hospital, Capital Medical University, Beijing, China
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Niinomi I, Oyama S, Inada A, Wakabayashi T, Iida T, Kambara H, Uchida M, Sano Y, Hosohata K. Current Status of Adverse Event Profile of Cyclosporine in Kidney, Stem Cell, and Heart Transplantations Using the Japanese Pharmacovigilance Database. Cureus 2022; 14:e29383. [PMID: 36159360 PMCID: PMC9490292 DOI: 10.7759/cureus.29383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2022] [Indexed: 11/18/2022] Open
Abstract
Background: Cyclosporine is widely used to prevent allograft rejection after transplantation. The purpose of this study was to clarify the adverse events profiles associated with cyclosporine in transplant patients using a spontaneous reporting system database. Methods: Retrospective pharmacovigilance disproportionality analysis was conducted using the Japanese Adverse Drug Event Report (JADER) database, with the reporting odds ratio (ROR) and 95% confidence interval (CI) for each adverse event. Results: The database comprised 3,327, 958, and 956 reports associated with cyclosporine in the kidney, stem cell, and heart transplant patients, respectively. Infectious and renal disorders were commonly detected in these transplant patients. The signal scores of cyclosporine for toxic nephropathy were noteworthy in the kidney (ROR: 15.1, 95% CI: 11-20.8) and stem cell (ROR, 216; 95% CI, 29.3-1593) transplantation. Cyclosporine in heart transplantation was strongly associated with gastric cancer (ROR, 39.4; 95% CI, 16.7-93.2), but not kidney or stem cell transplantation. Conclusion: It was suggested that there is a diversity in the strength of the association between cyclosporine and adverse events in the kidney, stem cell, and heart transplantation. Our results may provide useful information for treatment with cyclosporine, although further research with more data is needed.
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Koul R, Maiwall R, Alam S, Pamecha V, Tevethia HV, Sarin SK. Ictal Blinking in Hepatic Encephalopathy Pre- and Post-Liver Transplant: Report of Eight Patients. J Neurosci Rural Pract 2022; 13:476-482. [PMID: 35971395 PMCID: PMC9375689 DOI: 10.1055/s-0042-1750136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Objective Seizures are reported in 20 to 30% of cases with chronic liver disease in association with hepatic encephalopathy. Majority of these are focal seizures. Ictal blinking is reported first time in these patients pre- and post-liver transplant. Methods From November 2018 to October 2021, retrospective data was analyzed in patients with end-stage liver disease and hepatic encephalopathy, both pre- and post-liver transplant. Results Eight patients had ictal blinking, four were pre-transplant and four post-transplant. Five patients (four after liver transplant and one pre-transplant) were seizure free, three died of liver disease and multiorgan dysfunction, and one did not follow-up. Conclusion Ictal blinking in relation to liver disease and hepatic encephalopathy is reported, often missed and requires short duration antiepileptic medications.
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Affiliation(s)
- Roshan Koul
- Department of Neurology, Institute of Liver and Biliary Sciences (ILBS), Delhi, India
| | - Rakhi Maiwall
- Department of Hepatology, Institute of Liver and Biliary Sciences (ILBS), Delhi, India
| | - Seema Alam
- Department of Pediatric Hepatology, Institute of Liver and Biliary Sciences (ILBS), Delhi, India
| | - Vineynder Pamecha
- Department of Hepatobiliary Surgery, Institute of Liver and Biliary Sciences (ILBS), Delhi, India
| | | | - Shiv K. Sarin
- Department of Hepatology, Institute of Liver and Biliary Sciences (ILBS), Delhi, India
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Clinical and neurophysiological characterization of early neuromuscular involvement in children and adolescents with nephropathic cystinosis. Pediatr Nephrol 2022; 37:1555-1566. [PMID: 34791528 DOI: 10.1007/s00467-021-05343-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 10/16/2021] [Accepted: 10/18/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Nephropathic cystinosis is a rare autosomal recessive lysosomal storage disorder characterized by kidney and extra-renal complications due to the accumulation of cystine crystals in various tissues and organs. Herein, we describe the early neuromuscular complications in a cohort of pediatric nephropathic cystinosis patients. METHODS We prospectively evaluated the clinical, biochemical, and neurophysiological data of 15 cystinosis patients. Neurophysiological evaluation was performed to confirm or exclude presence of neuropathy and/or myopathy. RESULTS Patients' age ranged between 20 and 216 months at time of examination. Nine patients were males. Three patients had early abnormal neurophysiological features consistent with neuromuscular involvement (clinically asymptomatic proximal myopathy with a patchy distribution in one patient and isolated asymptomatic sensory nerve conduction changes in two patients). A fourth patient had mixed abnormal motor and sensory axonal neuropathic changes associated with overt clinical features (predominantly motor symptoms). Patients with abnormal neuromuscular features were significantly older in age than the unaffected group (P = 0.005) and had a diagnosis of cystinosis with subsequent cysteamine therapy at a significantly older age than the unaffected group (P = 0.027 and 0.001, respectively). CONCLUSIONS We expanded the recognized phenotypes of cystinosis neuromuscular complications with early proximal skeletal myopathy and symptomatic motor and sensory axonal neuropathy. Early asymptomatic neuromuscular complications could develop in pediatric patients and would require neurophysiological studies for early detection prior to development of overt clinical manifestations. Prompt diagnosis and timely initiation of cysteamine therapy with recommended dose can delay the development of neuromuscular complications. A higher resolution version of the Graphical abstract is available as Supplementary information.
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de Vasconcelos P, Lacerda JF. Hematopoietic Stem Cell Transplantation for Neurological Disorders: A Focus on Inborn Errors of Metabolism. Front Cell Neurosci 2022; 16:895511. [PMID: 35693884 PMCID: PMC9178264 DOI: 10.3389/fncel.2022.895511] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 05/09/2022] [Indexed: 11/19/2022] Open
Abstract
Hematopoietic stem cells have been investigated and applied for the treatment of certain neurological disorders for a long time. Currently, their therapeutic potential is harnessed in autologous and allogeneic hematopoietic stem cell transplantation (HSCT). Autologous HSCT is helpful in immune-mediated neurological diseases such as Multiple Sclerosis. However, clinical benefits derive more from the immunosuppressive conditioning regimen than the interaction between stem cells and the nervous system. Mainly used for hematologic malignancies, allogeneic HSCT explores the therapeutic potential of donor-derived hematopoietic stem cells. In the neurological setting, it has proven to be most valuable in Inborn Errors of Metabolism, a large spectrum of multisystem disorders characterized by congenital deficiencies in enzymes involved in metabolic pathways. Inborn Errors of Metabolism such as X-linked Adrenoleukodystrophy present with brain accumulation of enzymatic substrates that result in progressive inflammatory demyelination. Allogeneic HSCT can halt ongoing inflammatory neural destruction by replacing hematopoietic-originated microglia with donor-derived myeloid precursors. Microglia, the only neural cells successfully transplanted thus far, are the most valuable source of central nervous system metabolic correction and play a significant role in the crosstalk between the brain and hematopoietic stem cells. After transplantation, engrafted donor-derived myeloid cells modulate the neural microenvironment by recapitulating microglial functions and enhancing repair mechanisms such as remyelination. In some disorders, additional benefits result from the donor hematopoietic stem cell secretome that cross-corrects neighboring neural cells via mannose-6-phosphatase paracrine pathways. The limitations of allogeneic HSCT in this setting relate to the slow turnover of microglia and complications such as graft-vs.-host disease. These restraints have accelerated the development of hematopoietic stem cell gene therapy, where autologous hematopoietic stem cells are collected, manipulated ex vivo to overexpress the missing enzyme, and infused back into the patient. With this cellular drug vehicle strategy, the brain is populated by improved cells and exposed to supraphysiological levels of the flawed protein, resulting in metabolic correction. This review focuses on the mechanisms of brain repair resulting from HSCT and gene therapy in Inborn Errors of Metabolism. A brief mention will also be made on immune-mediated nervous system diseases that are treated with this approach.
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Affiliation(s)
- Pedro de Vasconcelos
- Serviço de Hematologia e Transplantação de Medula, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - João F. Lacerda
- Serviço de Hematologia e Transplantação de Medula, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
- JLacerda Lab, Hematology and Transplantation Immunology, Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
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Kharbat AF, Calles P, Ogle A, Vasylyeva TL, Pinkney K. A Case of Pediatric Posterior Reversible Encephalopathy Syndrome (PRES) Secondary to Post-streptococcal Glomerulonephritis: A Literature Review and Assessment of Treatment Modalities. Cureus 2022; 14:e25113. [PMID: 35733462 PMCID: PMC9205275 DOI: 10.7759/cureus.25113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2022] [Indexed: 11/18/2022] Open
Abstract
Posterior reversible encephalopathy syndrome (PRES) is a disorder that most commonly affects adults, and is characterized by neurologic symptoms such as encephalopathy, seizures, headaches, and visual disturbances. It usually occurs in the context of other systemic disturbances that result in hypertensive crises, such as renal failure, cytotoxic drugs, and autoimmune conditions. In children, it rarely manifests following chemotherapy induction or hematopoietic stem cell transplantation. No cases have been reported in the English literature connecting renal dysfunction and hypertensive emergency secondary to post-streptococcal glomerulonephritis (PSGN) with PRES. We present a case of an eight-year-old boy, who developed a constellation of symptoms suggestive of PSGN and later developed PRES. PRES is often confirmed upon suspicion through brain MRI showing subcortical edema of various brain regions including occipital, temporal, or parietal cortices. Our patient demonstrated subcortical edema of the bilateral occipital lobes and right cerebellar hemisphere, with positive antistreptolysin O (ASO) titers demonstrating PSGN as the likely etiology for his hypertensive emergency. Management included antihypertensive and anticonvulsant treatment, which allowed the resolution of the offending hypertensive emergency that resulted in PRES. Our case adds to the growing body of literature on PRES and describes a new etiology of pediatric PRES secondary to PSGN.
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Simsir M, Yildiz MG, Karatas M, Dalgic A, Ozturk I, Tatar E, Eren N, Erken E, Gungor O, Altunoren O. Hearing Impairments as an Overlooked Condition in Kidney Transplant Recipients. Transpl Int 2022; 35:10198. [PMID: 35497888 PMCID: PMC9039001 DOI: 10.3389/ti.2022.10198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 03/17/2022] [Indexed: 11/13/2022]
Abstract
It is not known whether hearing disorders improves with kidney transplantation. One of the neurotoxic effects of immunosuppressive drugs may be unrecognized hearing loss. In this study, our aim was to evaluate the hearing disorders in kidney transplant patients. Hearing problems in 46 kidney transplant patients [eGFR ≥ 60 ml/min/1.73 m2 (30 Tacrolimus, 16 mTOR inhibitor users)], 23 hemodialysis patients, and 20 healthy controls were evaluated with a questionnaire and high-frequency audiometry. More than half (58.7%) of the transplant patients had at least one hearing problem. Hearing loss was observed in 50%, 60.9% and 76.1% of the transplant patients at 8,000, 16,000 and 20,000 Hz. Hearing thresholds of transplant and hemodialysis patients increased from 4,000 to 20,000 Hz and was higher than that of controls. Hearing thresholds were higher at 1,000–2,000 Hz in patients using tacrolimus and at 16,000–20,000 Hz in patients using mTOR inhibitor. No correlation was found between hearing threshold and blood tacrolimus or mTOR inhibitor levels. Most kidney transplant and hemodialysis patients have hearing loss at higher frequencies than medium frequencies. Hearing loss in chronic kidney patients is likely to be permanent and kidney transplantation may not improve hearing problems. Hearing problems may be more pronounced at medium frequencies in patients receiving tacrolimus but at higher frequencies in patients receiving mTOR inhibitors.
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Affiliation(s)
- Melis Simsir
- Department of Internal Medicine, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
| | - Muhammed Gazi Yildiz
- Department of Otolaryngology Head and Neck Surgery, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
| | - Murat Karatas
- Department of General Surgery, Izmir Bozyaka Education and Research Hospital, Izmir, Turkey
| | - Abdullah Dalgic
- Department of Otolaryngology Head and Neck Surgery, Izmir Bozyaka Education and Research Hospital, Izmir, Turkey
| | - Ilyas Ozturk
- Department of Nephrology, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
| | - Erhan Tatar
- Department of Nephrology, Izmir Bozyaka Education and Research Hospital, Izmir, Turkey
| | - Necmi Eren
- Department of Nephrology, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Ertugrul Erken
- Department of Nephrology, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
| | - Ozkan Gungor
- Department of Nephrology, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
| | - Orcun Altunoren
- Department of Nephrology, Faculty of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
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Araújo NC, Suassuna JHR, Fernandes RDCL. Transcranial sonography depicts a larger substantia nigra echogenic area in renal transplant patients on calcineurin inhibitors than on rapamycin. BMC Nephrol 2022; 23:108. [PMID: 35300603 PMCID: PMC8931960 DOI: 10.1186/s12882-022-02741-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 03/14/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND After kidney transplantation neurologic manifestations may develop, including Parkinson's disease (PD). An enlarged substantia nigra (SN) by transcranial sonography has been recognized as a marker of PD. METHODS In renal transplant recipients (RTRs = 95) and controls (n = 20), measurement of mesencephalon, SN, third ventricle, spleen and carotid intima-media thickness (cIMT) and middle cerebral artery (MCA), kidney and spleen arteries Doppler resistive index (RI) were performed. RESULTS RTRs had larger SN, third ventricle and cIMT and higher renal RI than controls. The SN was larger in the CNIs group than in controls and rapamycin group, while the third ventricle was similar between patients but larger than in controls. In RTRs, SN showed a direct linear correlation with spleen and the third ventricle with age, cIMT and RI of the MCA, kidney and spleen. In CNIs group the SN correlated positively with age and cIMT, while the third ventricle reproduced RTRs correlations. Rapamycin group showed a direct linear relationship between the third ventricle and age and RI of the MCA, kidney and spleen; SN showed no correlations. CONCLUSION RTRs on CNIs present a larger SN area than on rapamycin, probably due to the antiproliferative effect of rapamycin. This finding might be relevant when interpreting TCS in RTRs.
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Affiliation(s)
- Nordeval Cavalcante Araújo
- Division of Nephrology, University of the State of Rio de Janeiro, Boulevard 28 de Setembro, 77 - Vila Isabel, Rio de Janeiro-RJ, 20551-030, Brazil.
| | - José Hermógenes Rocco Suassuna
- Division of Nephrology, University of the State of Rio de Janeiro, Boulevard 28 de Setembro, 77 - Vila Isabel, Rio de Janeiro-RJ, 20551-030, Brazil
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15
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Ismail II, Abdelnabi EA, Khan R, Al-Hashel JY, Sharfuddin KM. Tacrolimus-Induced Leukoencephalopathy in a Renal Transplantation Patient. DUBAI MEDICAL JOURNAL 2022. [DOI: 10.1159/000521790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Tacrolimus is an immunosuppressant that is frequently used following renal transplantation. Several mild neurological side effects of tacrolimus have been reported in the literature; however, severe complications in the form of confusion, seizures, and coma are rare. Herein, we report a 16-year-old boy on tacrolimus following living-donor kidney transplant, who presented with subacute onset of hand tremors, headache, altered mental status, and progressed to akinetic mute state. He was diagnosed with tacrolimus-induced leukoencephalopathy based on findings of his magnetic resonance imaging and ruling out other possible causes. He showed clinical and radiological improvement after discontinuation of tacrolimus. Radiological features of tacrolimus-induced leukoencephalopathy are more heterogenous than commonly perceived and should be suspected in such patients. The potential neurotoxicity of tacrolimus should be recognized in patients with renal transplantation, and switching to a different immunosuppressant is warranted to prevent permanent neurological damage.
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16
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Lijdsman S, Königs M, van Sandwijk MS, Bouts AH, van Hoeck K, de Jong H, Engelen M, Oosterlaan J, Bemelman FJ, Oostrom KJ, Groothoff JW. Structural brain abnormalities in children and young adults with severe chronic kidney disease. Pediatr Nephrol 2022; 37:1125-1136. [PMID: 34800137 PMCID: PMC9023396 DOI: 10.1007/s00467-021-05276-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 08/13/2021] [Accepted: 08/31/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND The pathophysiology of neurological dysfunction in severe chronic kidney disease (CKD) in children and young adults is largely unknown. We aimed to investigate brain volumes and white matter integrity in this population and explore brain structure under different treatment modalities. METHODS This cross-sectional study includes 24 patients with severe CKD (eGFR < 30) aged 8-30 years (median = 18.5, range = 9.1-30.5) on different therapy modalities (pre-dialysis, n = 7; dialysis, n = 7; transplanted, n = 10) and 21 healthy controls matched for age, sex, and parental educational level. Neuroimaging targeted brain volume using volumetric analysis on T1 scans and white matter integrity with tract-based spatial statistics and voxel-wise regression on diffusion tensor imaging (DTI) data. RESULTS CKD patients had lower white matter integrity in a widespread cluster of primarily distal white matter tracts compared to healthy controls. Furthermore, CKD patients had smaller volume of the nucleus accumbens relative to healthy controls, while no evidence was found for abnormal volumes of gray and white matter or other subcortical structures. Longer time since successful transplantation was related to lower white matter integrity. Exploratory analyses comparing treatment subgroups suggest lower white matter integrity and smaller volume of the nucleus accumbens in dialysis and transplanted patients relative to healthy controls. CONCLUSIONS Young CKD patients seem at risk for widespread disruption of white matter integrity and to some extent smaller subcortical volume (i.e., nucleus accumbens). Especially patients on dialysis therapy and patients who received a kidney transplant may be at risk for disruption of white matter integrity and smaller volume of the nucleus accumbens.
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Affiliation(s)
- Sophie Lijdsman
- Department of Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam Reproduction & Development, Emma Children's Hospital, Amsterdam University Medical Centers (Amsterdam UMC), University of Amsterdam, G8-136, PO Box 22660, 1100 DD, Amsterdam, Netherlands.
| | - Marsh Königs
- Emma Neuroscience Group, Department of Pediatrics, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Marit S. van Sandwijk
- Department of Nephrology, Amsterdam Infection & Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands ,Dianet Dialysis Centre, Amsterdam, Netherlands
| | - Antonia H. Bouts
- Department of Pediatric Nephrology, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Koen van Hoeck
- Department of Pediatrics, University Hospital Antwerp, Edegem, Belgium
| | - Huib de Jong
- Department of Pediatrics, Sophia Children’s Hospital, Erasmus MC, Rotterdam, Netherlands
| | - Marc Engelen
- Department of Pediatric Neurology, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Jaap Oosterlaan
- Emma Neuroscience Group, Department of Pediatrics, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Frederike J. Bemelman
- Department of Nephrology, Amsterdam Infection & Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Kim J. Oostrom
- Department of Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam University Medical Centers (Amsterdam UMC), University of Amsterdam, G8-136, PO Box 22660, 1100 DD Amsterdam, Netherlands
| | - Jaap W. Groothoff
- Department of Pediatric Nephrology, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
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Sastre L, Crespo G. Neurotoxicity after liver transplantation: does donor age matter? Transl Gastroenterol Hepatol 2021; 6:66. [PMID: 34805588 DOI: 10.21037/tgh.2020.01.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 01/15/2020] [Indexed: 11/06/2022] Open
Affiliation(s)
- Lydia Sastre
- Liver Unit, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), University of Barcelona, Barcelona, Spain
| | - Gonzalo Crespo
- Liver Unit, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), University of Barcelona, Barcelona, Spain
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18
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Jin B, Kim GY, Cheon SM. Tacrolimus-induced neurotoxicity from bipolar disorder to status epilepticus under the therapeutic serum level: a case report. BMC Neurol 2021; 21:448. [PMID: 34781882 PMCID: PMC8591960 DOI: 10.1186/s12883-021-02479-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 11/03/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Tacrolimus is a macrolide immunosuppressant widely used to prevent rejection after solid organ transplantation. In general, adverse events of tacrolimus occur more often as the concentration of tacrolimus in the blood increases. We report the case of a 39-year-old man who developed a variety of adverse events despite in the therapeutic level of tacrolimus in the blood. CASE PRESENTATION A 39-year-old man underwent liver transplantation for liver cirrhosis due to alcoholic liver disease. The postoperative immunosuppressant consisted of tacrolimus (5 mg) and mycophenolate (500 mg) twice daily. Five months after taking tacrolimus, he presented with talkativeness, which gradually worsened. Brain magnetic resonance imaging performed 10 months after tacrolimus administration revealed a hyperintense lesion affecting the middle of the pontine tegmentum on T2WI. The blood concentration of tacrolimus was 7.2 ng/mL (therapeutic range 5-20 ng/mL). After 21 months, he exhibited postural tremor in both the hands. Twenty-four months after taking tacrolimus, he showed drowsy mentality, intention tremor, and dysdiadochokinesia. Electroencephalography presented generalized high-voltage rhythmic delta waves; therefore, tacrolimus was discontinued in suspicion of tacrolimus-induced neurotoxicity, and anticonvulsive treatment was started. The level of consciousness gradually improved, and the patient was able to walk independently with mild ataxia. CONCLUSION This case shows that tacrolimus-induced neurotoxicity can occur even at normal concentrations. Therefore, if a patient taking tacrolimus exhibits psychiatric or neurologic symptoms, neurotoxicity should be considered even when the blood tacrolimus is within the therapeutic range.
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Affiliation(s)
- Bora Jin
- Department of Neurology, School of Medicine, Dong-A University, 26, Daesingongwon-ro, Seo-gu, Busan, 49201, Korea
| | - Ga Yeon Kim
- Department of Neurology, School of Medicine, Dong-A University, 26, Daesingongwon-ro, Seo-gu, Busan, 49201, Korea
| | - Sang-Myung Cheon
- Department of Neurology, School of Medicine, Dong-A University, 26, Daesingongwon-ro, Seo-gu, Busan, 49201, Korea.
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19
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Vinnakota JM, Zeiser R. Acute Graft- Versus-Host Disease, Infections, Vascular Events and Drug Toxicities Affecting the Central Nervous System. Front Immunol 2021; 12:748019. [PMID: 34691059 PMCID: PMC8527894 DOI: 10.3389/fimmu.2021.748019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/21/2021] [Indexed: 02/02/2023] Open
Abstract
Allogeneic hematopoietic cell transplantation (allo-HCT) is a curative therapy for patients with hematological malignancies. Acute Graft versus host diseases (GVHD) is a major immune mediated side effect of allo-HCT that can affect the central nervous system (CNS) in addition to post-allo-HCT vascular events, drug toxicity or infections. Here we summarize and discuss recent preclinical data on the CNS as a target of acute GVHD and the known mechanisms contributing to neurotoxicity with a focus on microglia and T cells. We also discuss open questions in the field and place the findings made in mouse models in a clinical context. While in mice the neurological deficits can be assessed in a controlled fashion, in patients the etiology of the CNS damage is difficult to attribute to acute GVHD versus infections, vascular events, and drug-induced toxicity. Ultimately, we discuss novel therapies for GVHD of the CNS. Our understanding of the biological mechanisms that lead to neurotoxicity after allo-HCT increased over the last decade. This review provides insights into CNS manifestations of GVHD versus other etiologies of CNS damage in mice and patients.
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Affiliation(s)
- Janaki Manoja Vinnakota
- Department of Medicine I - Medical Centre, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Faculty of Biology, Albert-Ludwigs-University, Freiburg, Germany
| | - Robert Zeiser
- Department of Medicine I - Medical Centre, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS – Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
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20
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Gu BM, Ko HH, Lee HK, Ra YJ, Lee HS, Kim HS. Guillain-Barré Syndrome after Lung Transplantation in the Immediate Postoperative Period: Case Report. J Chest Surg 2021; 54:396-399. [PMID: 33767020 PMCID: PMC8548184 DOI: 10.5090/jcs.20.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 09/23/2020] [Accepted: 10/04/2020] [Indexed: 11/17/2022] Open
Abstract
A 58-year-old man, incapable of maintaining oxygen saturation with mechanical ventilation, was admitted to our hospital for veno-venous extracorporeal membrane oxygenation (ECMO) treatment. He was diagnosed with acute respiratory distress syndrome (ARDS) due to influenza A pneumonia. His condition stabilized with antibiotics and steroid administration, but weaning from ECMO failed due to post-infectious pulmonary sequelae. On day 84 after admission, he underwent bilateral lung transplantation. In the postoperative phase, he did not regain consciousness even after discontinuation of sedatives for 3 days. However, spontaneous pupillary reflex and eye movements were preserved, while communication and upper and lower limb movements were affected. The nerve conduction study was diagnostic of Guillain-Barré syndrome. He was managed with intravenous immunoglobulins and plasmapheresis. Mild recovery of the facial muscles was seen, but he died 24 days post-surgery due to progressive ARDS and sepsis.
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Affiliation(s)
- Byung Mo Gu
- Department of Thoracic and Cardiovascular Surgery, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Ho Hyun Ko
- Department of Thoracic and Cardiovascular Surgery, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Hong Kyu Lee
- Department of Thoracic and Cardiovascular Surgery, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Yong Joon Ra
- Department of Thoracic and Cardiovascular Surgery, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Hee Sung Lee
- Department of Thoracic and Cardiovascular Surgery, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - Hyoung Soo Kim
- Department of Thoracic and Cardiovascular Surgery, Hallym University Sacred Heart Hospital, Anyang, Korea
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21
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Nogueira JM, Freire MJ, Nova VV, Jesus G. When Paranoia Comes with the Treatment: Psychosis Associated with Tacrolimus Use. Case Rep Nephrol Dial 2021; 11:241-246. [PMID: 34595211 PMCID: PMC8436620 DOI: 10.1159/000515048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 01/29/2021] [Indexed: 11/19/2022] Open
Abstract
Tacrolimus is an immunosuppressive drug frequently used in solid organ transplant recipients. This drug has well-documented neuropsychiatric side effects in the literature, although emergence of psychotic symptoms is rare, being only described in a very few case reports. We present a case of a renal transplant recipient with no prior psychiatric history, who developed a severe psychosis secondary to supratherapeutic tacrolimus' blood concentrations. This case highlights the importance of clinical awareness to rare but severe neuropsychiatric effects due to tacrolimus use.
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Affiliation(s)
- João Machado Nogueira
- Department of Psychiatry and Mental Health, Centro Hospitalar de Setúbal, Setúbal, Portugal
| | - Maria João Freire
- Department of Psychiatry and Mental Health, Centro Hospitalar de Setúbal, Setúbal, Portugal
| | - Vanessa Vila Nova
- Department of Psychiatry and Mental Health, Centro Hospitalar de Setúbal, Setúbal, Portugal
| | - Gustavo Jesus
- Department of Liaison Psychiatry, Centro Hospitalar de Lisboa Central, Lisboa, Portugal.,Faculdade de Medicina de Lisboa, University Clinic of Psychiatry and Medical Psychology, Lisboa, Portugal
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22
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Sustained Intra-Articular Release and Biocompatibility of Tacrolimus (FK506) Loaded Monospheres Composed of [PDLA-PEG 1000]- b-[PLLA] Multi-Block Copolymers in Healthy Horse Joints. Pharmaceutics 2021; 13:pharmaceutics13091438. [PMID: 34575514 PMCID: PMC8465142 DOI: 10.3390/pharmaceutics13091438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/31/2021] [Accepted: 09/07/2021] [Indexed: 11/16/2022] Open
Abstract
There is an increasing interest in controlled release systems for local therapy in the treatment of human and equine joint diseases, aiming for optimal intra-articular concentrations with no systemic side effects. In this study, the intra-articular tolerability and suitability for local and sustained release of tacrolimus (FK506) from monospheres composed of [PDLA-PEG1000]-b-PLLA multiblock copolymers were investigated. Unloaded and tacrolimus-loaded (18.4 mg tacrolimus/joint) monospheres were injected into the joints of six healthy horses, with saline and hyaluronic acid (HA) in the contralateral joints as controls. Blood and synovial fluid were analysed for the tacrolimus concentration and biomarkers for inflammation and cartilage metabolism. After an initial burst release, sustained intra-articular tacrolimus concentrations (>20 ng/mL) were observed during the 42 days follow-up. Whole-blood tacrolimus levels were below the detectable level (<0.5 ng/mL). A transient inflammatory reaction was observed for all substances, evidenced by increases of the synovial fluid white blood cell count and total protein. Prostaglandin and glycosaminoglycan release were increased in joints injected with unloaded monospheres, which was mitigated by tacrolimus. Both tacrolimus-loaded monospheres and HA transiently increased the concentration of collagen II cleavage products (C2C). A histologic evaluation of the joints at the endpoint showed no pathological changes in any of the conditions. Together, these results indicate the good biocompatibility of intra-articular applied tacrolimus-loaded monospheres combined with prolonged local drug release while minimising the risk of systemic side effects. Further evaluation in a clinical setting is needed to determine if tacrolimus-loaded monospheres can be beneficial in the treatment of inflammatory joint diseases in humans and animals.
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23
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Dahlenburg H, Cameron D, Yang S, Bachman A, Pollock K, Cary W, Pham M, Hendrix K, White J, Nelson H, Deng P, Anderson JS, Fink K, Nolta J. A novel Huntington's disease mouse model to assess the role of neuroinflammation on disease progression and to develop human cell therapies. Stem Cells Transl Med 2021; 10:1033-1043. [PMID: 33710799 PMCID: PMC8235129 DOI: 10.1002/sctm.20-0431] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 01/08/2021] [Accepted: 02/13/2021] [Indexed: 02/06/2023] Open
Abstract
Huntington's disease (HD) is a fatal autosomal-dominant neurodegenerative disease caused by a trinucleotide CAG repeat expansion of the huntingtin gene (HTT) that affects 1 in every 10 000 individuals in the United States. Our lab developed a novel immune deficient HD mouse strain, the YACNSG, from a commonly used line, the YAC128 mouse, to enable transplantation studies using engineered human cells in addition to studying the impact of the immune system on disease progression. The primary goal of this project was to characterize this novel immune deQficient HD mouse model, using behavioral assays and histology to compare this new model to the immune competent YAC128 and immune deficient mice that had engraftment of a human immune system. Flow cytometry was used to confirm that the YACNSG strain lacked immune cells, and in vivo imaging was used to assess human mesenchymal stem/stromal cell (MSC) retention compared with a commonly used immune deficient line, the NSG mouse. We found that YACNSG were able to retain human MSCs longer than the immune competent YAC128 mice. We performed behavioral assessments starting at 4 months of age and continued testing monthly until 12 months on the accelerod and in the open field. At 12 months, brains were isolated and evaluated using immunohistochemistry for striatal volume. Results from these studies suggest that the novel immune deficient YACNSG strain of mice could provide a good model for human stem-cell based therapies and that the immune system appears to play an important role in the pathology of HD.
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Affiliation(s)
- Heather Dahlenburg
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - David Cameron
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of NeurologyUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Sheng Yang
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Angelica Bachman
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Kari Pollock
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Whitney Cary
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Missy Pham
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Kyle Hendrix
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Jeannine White
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Haley Nelson
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Peter Deng
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of NeurologyUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Joseph S. Anderson
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Kyle Fink
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of NeurologyUniversity of California Davis HealthSacramentoCaliforniaUSA
| | - Jan Nolta
- Stem Cell Program and Institute for Regenerative CuresUniversity of California Davis HealthSacramentoCaliforniaUSA
- Department of Internal MedicineUniversity of California Davis HealthSacramentoCaliforniaUSA
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Chen WY, Lin PY, Lai CH, Chen YL. Evaluation of Clinical Neuropathy After Living Donor Liver Transplant. EXP CLIN TRANSPLANT 2021; 19:664-670. [PMID: 34085916 DOI: 10.6002/ect.2020.0392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Neurologic complications are more common in liver transplants than in other solid-organ transplants. One such neurologic complication, peripheral neuropathy, may cause functional limitations for recipients and have a negative effect on posttransplant quality of life. We aimed to examine the risk factors associated with the occurrence of clinical neuropathy after liver transplant and to investigate the frequency of sensory deficits. MATERIALS AND METHODS In this case-control study, we analyzed factors from medical records of 63 recipients who underwent living donor liver transplant during the period from January 2010 to December 2016. A neuropathy symptom score was assigned to identify the patients who had clinical neuropathy (case group) and the patients without clinical neuropathy (control group). Quantitative sensory testing was performed to measure the warm and cold detection thresholds, and the difference between the 2 groups was examined. RESULTS Compared with controls, patients with clinical neuropathy were older (61.0 vs 55.4 years; P = .028), had higher rates of diabetes (46.2% vs 16.0%; P = .03), and were taking antiviral agents against hepatitis B (100% vs 62%; P = .006). Patients with neuropathic symptoms had significantly increased frequencies of impairment of warm and cold detection thresholds. In addition, the greater severity of symptoms showed higher detection thresholds of warm (control, 40.7℃; mild-to-moderate, 43.8 ℃; severe, 46.0 ℃; P = .007) and cold (control, 28.8℃ ; mild-to-moderate, 27.0 ℃; severe, 21.8 ℃ ; P = .008). CONCLUSIONS Our findings show that older age, diabetes, and treatment with oral antiviral agents against hepatitis B virus were more likely to be associated with the occurrence of clinical neuropathy after liver transplant. Early awareness and careful monitoring are warranted.
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Affiliation(s)
- Wen-Yuan Chen
- From the Department of Pharmacy, Changhua Christian Hospital, Changhua, Taiwan
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Otsuka S, Melis N, Gaida MM, Dutta D, Weigert R, Ashwell JD. Calcineurin inhibitors suppress acute graft-versus-host disease via NFAT-independent inhibition of T cell receptor signaling. J Clin Invest 2021; 131:147683. [PMID: 33822776 DOI: 10.1172/jci147683] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/31/2021] [Indexed: 01/31/2023] Open
Abstract
Inhibitors of calcineurin phosphatase activity (CNIs) such as cyclosporin A (CsA) are widely used to treat tissue transplant rejection and acute graft-versus-host disease (aGVHD), for which inhibition of gene expression dependent on nuclear factor of activated T cells (NFAT) is the mechanistic paradigm. We recently reported that CNIs inhibit TCR-proximal signaling by preventing calcineurin-mediated dephosphorylation of LckS59, an inhibitory modification, raising the possibility of another mechanism by which CNIs suppress immune responses. Here we used T cells from mice that express LckS59A, which cannot accept a phosphate at residue 59, to initiate aGVHD. Although CsA inhibited NFAT-dependent gene upregulation in allo-aggressive T cells expressing either LckWT or LckS59A, it was ineffective in treating disease when the T cells expressed LckS59A. Two important NFAT-independent T cell functions were found to be CsA-resistant in LckS59A T cells: upregulation of the cytolytic protein perforin in tissue-infiltrating CD8+ T cells and antigen-specific T/DC adhesion and clustering in lymph nodes. These results demonstrate that effective treatment of aGVHD by CsA requires NFAT-independent inhibition of TCR signaling. Given that NFATs are widely expressed and off-target effects are a major limitation in CNI use, it is possible that targeting TCR-associated calcineurin directly may provide effective therapies with less toxicity.
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Affiliation(s)
| | - Nicolas Melis
- Laboratory of Cellular and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Matthias M Gaida
- Institute of Pathology, University Medical Center Mainz, Mainz, Germany
| | | | - Roberto Weigert
- Laboratory of Cellular and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
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Incident Parkinson's disease in kidney transplantation recipients: a nationwide population-based cohort study in Korea. Sci Rep 2021; 11:10541. [PMID: 34007005 PMCID: PMC8131700 DOI: 10.1038/s41598-021-90130-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 03/19/2021] [Indexed: 11/08/2022] Open
Abstract
This nation-wide population based retrospective cohort study evaluated risk of incident Parkinson’ disease in kidney transplant (KT) recipients in Korea. From Korean National Health Insurance Service database, we identified incident KT recipients aged ≥ 40 years without any history of Parkinson’s disease between 2007 and 2015. We established two control cohorts without a history of Parkinson’ disease: (1) General population (GP) cohort of insured subjects without a history of kidney disease, (2) end-stage renal disease (ESRD) cohort of incident ESRD subjects, with frequency matched for age, sex, and inclusion year. Parkinson’s disease data were obtained from baseline until December 2017. We followed 8372 KT recipients, ESRD patients, and GP for 45,723, 38,357, and 47,476 patient-years, respectively. Their mean age was 51.2 years and 60.1% were men. During follow-up period, 19 KT recipients, 53 ESRD patients, and 15 GP developed Parkinson’ disease. Risk of incident Parkinson’s disease in KT recipients was similar to that in GP (adjusted hazard ratio [HR] 0.86, 95% confidence interval [CI] 0.35 to 2.13, P = 0.75) and significantly lower than that in ESRD patients (adjusted HR 0.31, 95% CI 0.18 to 0.52, P < 0.001). Older age was the strongest predictor for incident Parkinson’s disease in KT recipients.
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Kirk AD, Adams AB, Durrbach A, Ford ML, Hildeman DA, Larsen CP, Vincenti F, Wojciechowski D, Woodle ES. Optimization of de novo belatacept-based immunosuppression administered to renal transplant recipients. Am J Transplant 2021; 21:1691-1698. [PMID: 33128812 PMCID: PMC8246831 DOI: 10.1111/ajt.16386] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 10/13/2020] [Accepted: 10/24/2020] [Indexed: 01/25/2023]
Abstract
Kidney transplant recipients administered belatacept-based maintenance immunosuppression present with a more favorable metabolic profile, reduced incidence of de novo donor-specific antibodies (DSAs), and improved renal function and long-term patient/graft survival relative to individuals receiving calcineurin inhibitor (CNI)-based immunosuppression. However, the rates and severity of acute rejection (AR) are greater with the approved belatacept-based regimen than with CNI-based immunosuppression. Although these early co-stimulation blockade-resistant rejections are typically steroid sensitive, the higher rate of cellular AR has led many transplant centers to adopt immunosuppressive regimens that differ from the approved label. This article summarizes the available data on these alternative de novo belatacept-based maintenance regimens. Steroid-sparing, belatacept-based immunosuppression (following T cell-depleting induction therapy) has been shown to yield AR rates comparable to those seen with CNI-based regimens. Concomitant treatment with belatacept plus a mammalian target of rapamycin inhibitor (mTORi; sirolimus or everolimus) has yielded AR rates ranging from 0 to 4%. Because the optimal induction agent and number of induction doses; blood levels of mTORi; and dose, duration, and use of corticosteroids have yet to be determined, larger prospective clinical trials are needed to establish the optimal alternative belatacept-based regimen for minimizing early cellular AR occurrence.
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Affiliation(s)
- Allan D. Kirk
- Department of SurgeryDuke UniversityDurhamNorth Carolina
| | | | - Antoine Durrbach
- Assistance Publique‐Hôpitaux de ParisNephrology and Renal Transplantation DepartmentHôpital Henri‐MondorUniversité Paris‐SaclayCreteilFrance
| | - Mandy L. Ford
- Emory Transplant CenterEmory UniversityAtlantaGeorgia
| | - David A. Hildeman
- Division of ImmunobiologyCincinnati Children's Hospital Medical Center and Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOhio
| | | | - Flavio Vincenti
- Division of Transplant SurgeryUniversity of CaliforniaSan FranciscoCalifornia
| | | | - E. Steve Woodle
- Division of TransplantationDepartment of SurgeryUniversity of Cincinnati College of MedicineCincinnatiOhio
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Tsai YF, Liu FC, Chen CY, Lin JR, Yu HP. Effect of Mycophenolate Mofetil Therapy on Recurrence of Hepatocellular Carcinoma after Liver Transplantation: A Population-Based Cohort Study. J Clin Med 2021; 10:jcm10081558. [PMID: 33917215 PMCID: PMC8068064 DOI: 10.3390/jcm10081558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/11/2021] [Accepted: 03/18/2021] [Indexed: 12/23/2022] Open
Abstract
Hepatocellular carcinoma (HCC) recurrence after liver transplantation is associated with immunosuppressants. However, the appropriate immunosuppressant for HCC recipients is still debated. Data for this nationwide population-based cohort study were extracted from the National Health Insurance Research Database of Taiwan. A total of 1250 liver transplant recipients (LTRs) with HCC were included. We analyzed the risk factors for post-transplant HCC recurrences. Cumulative defined daily dose (cDDD) represented the exposure duration and was calculated as the amount of dispensed defined daily dose (DDD) of mycophenolate mofetil (MMF). The dosage effects of MMF on HCC recurrence and liver graft complication rates were investigated. A total of 155 LTRs, having experienced post-transplant HCC recurrence, exhibited low survival probability at 1-, 3-, 5-, and 10-year observations. Our results demonstrated increased HCC recurrence rate after liver transplantation (p = 0.0316) following MMF administration; however, no significant increase was demonstrated following cyclosporine, tacrolimus, or sirolimus administration. Notably, our data demonstrated significantly increased HCC recurrence rate following MMF administration with cDDD > 0.4893 compared with cDDD ≤ 0.4893 or no administration of MMF (p < 0.0001). MMF administration significantly increases the risk of HCC recurrence. Moreover, a MMF-minimizing strategy (cDDD ≤ 0.4893) is recommended for recurrence-free survival.
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Affiliation(s)
- Yung-Fong Tsai
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan; (Y.-F.T.); (F.-C.L.); (C.-Y.C.)
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Fu-Chao Liu
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan; (Y.-F.T.); (F.-C.L.); (C.-Y.C.)
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Chun-Yu Chen
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan; (Y.-F.T.); (F.-C.L.); (C.-Y.C.)
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Jr-Rung Lin
- Clinical Informatics and Medical Statistics Research Center, Chang Gung University, Taoyuan 333, Taiwan;
- Graduate Institute of Clinical Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Huang-Ping Yu
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan; (Y.-F.T.); (F.-C.L.); (C.-Y.C.)
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
- Correspondence: ; Tel.: +86-886-3-3281200 (ext. 2324)
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Ali K, Karan A, Biswah S, Teelucksingh S, Mohammed NB. Posterior Reversible Encephalopathy Syndrome: Tips for Diagnosis and Treatment. Cureus 2021; 13:e14087. [PMID: 33903844 PMCID: PMC8064425 DOI: 10.7759/cureus.14087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Often described as a clinico-radiological entity, posterior reversible encephalopathy syndrome (PRES) is being increasingly diagnosed nowadays. However, mystery still surrounds its exact etiology. Though there are no standardized diagnostic criteria for this syndrome, there is a consistent feature associated with it: brain vasogenic edema in combination with neurotoxicity. The nonspecific nature of this condition leaves room for the diagnosis to be overlooked, leading to delays in providing appropriate treatment and unfavorable patient outcomes. PRES is associated with a variety of medical conditions including hypertension, eclampsia, autoimmune conditions, renal failure, sepsis, and an immunocompromised state, such as that secondary to the use of immunosuppressive therapy, human immunodeficiency virus (HIV), and organ transplants. Treatment by a multidisciplinary team and prompt identification and reversal of the underlying cause can lead to beneficial outcomes, as in the case we present in this report.
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Affiliation(s)
- Kabeer Ali
- Internal Medicine, Eric Williams Medical Sciences Complex, Champs Fleurs, TTO
| | - Abhinav Karan
- Internal Medicine, Medical Associates Hospital, St. Joseph, TTO
| | - Shivonne Biswah
- Internal Medicine, Eric Williams Medical Sciences Complex, Champs Fleurs, TTO
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Celikkan FT, Hayirli Ozyol N, Nakkas H, Evirgen O. Ultrastructural and morphometric alterations to the peripheral nerve following the administration of immunosuppressive agent tacrolimus (FK506). Ultrastruct Pathol 2021; 45:112-117. [PMID: 33596749 DOI: 10.1080/01913123.2021.1881673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Tacrolimus, a widely used immunosuppressive drug for preventing graft rejection following organ transplantation, was reported to develop neurotoxic side effects ranging from mild to severe symptoms in the literature. Rats were randomly divided into three groups as control and 2-week and 3-week treatment groups and received a 2 mg/kg/day tacrolimus by oral gavage. Animals were sacrificed and sciatic nerves obtained from all groups were fixed and processed for light and electron microscopic investigations. The myelinated fiber diameter, axon diameter, G-ratio (axon diameter/myelinated fiber diameter), and myelin thickness were also determined. The data obtained in the control and tacrolimus-treated groups were compared.The control group sciatic nerve fascicles showed normal morphology with myelinated and unmyelinated fibers. Experimental groups exhibited axonal dilatation, irregularly thickened and vacuolated myelin sheaths with separation of myelin layers. The morphometric analysis showed that the myelinated fibers of the 2-week tacrolimus-treated group displayed a moderate increase in the myelin thickness and axon and fiber diameter in comparison with the control and 3-week tacrolimus-treated groups. The G-ratio was found to be in normal range in all groups and there were no statistically significant difference.The present study indicates that the treatment with tacrolimus may produce a mild degenerative change but prolonged drug administration for 3 weeks led to improvement in morphometric and morphologic data and the normal G-ratio values, suggesting that the regeneration capacity of the myelinated fibers maintains their normal function to transmit nerve impulses.
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Affiliation(s)
- Ferda Topal Celikkan
- Faculty of Medicine, Department of Histology and Embryology, Ankara University, Ankara, Turkey
| | - Nazli Hayirli Ozyol
- Faculty of Medicine, Department of Histology and Embryology, Hitit University, Corum, Turkey
| | - Hilal Nakkas
- Faculty of Medicine, Department of Histology and Embryology, Ankara Yildirim Beyazit University, Ankara, Turkey
| | - Oya Evirgen
- Faculty of Medicine, Department of Histology and Embryology, Ankara University, Ankara, Turkey
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Recurrent Posterior Reversible Encephalopathy Syndrome in an Adolescent Boy with End-Stage Renal Disease. Case Rep Pediatr 2021; 2021:6675454. [PMID: 33643673 PMCID: PMC7902131 DOI: 10.1155/2021/6675454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/20/2021] [Accepted: 01/25/2021] [Indexed: 12/20/2022] Open
Abstract
Posterior reversible encephalopathy syndrome (PRES), also known as reversible posterior leukoencephalopathy syndrome, is a neurological entity characterized by acute change in consciousness, visual impairment, headache, and seizures. It is associated with autoimmune disease, immunosuppressive agents, organ transplantation, acute glomerulonephritis, and sepsis. Typically, vasogenic edema is seen in the white matter of parieto-occipital lobes but can also involve atypical locations such as frontal lobes, thalamus, basal ganglia, and gray matter. While occurring extensively in adults, few cases, especially recurrent episodes, have been described in children. We report a case of recurrent PRES in a 17-year-old boy with end-stage renal disease on a peritoneal dialysis program who initially presented with hypertension and seizures. He emergently received intravenous antihypertensive medication with immediate and sustained improvement in his mental status. Information about recurrent PRES in children is limited because it is not commonly seen. We examine the clinical features of PRES and highlight important points for the diagnosis and management of this rare syndrome. This report demonstrates the importance of pediatricians to consider PRES in the differential diagnosis in children presenting with acute altered mental status. Blood pressure measurements, which are often overlooked in pediatric care, may assist in correctly diagnosing patients.
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Wardaszka P, Soczewka P, Sienko M, Zoladek T, Kaminska J. Partial Inhibition of Calcineurin Activity by Rcn2 as a Potential Remedy for Vps13 Deficiency. Int J Mol Sci 2021; 22:ijms22031193. [PMID: 33530471 PMCID: PMC7865597 DOI: 10.3390/ijms22031193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/12/2022] Open
Abstract
Regulation of calcineurin, a Ca2+/calmodulin-regulated phosphatase, is important for the nervous system, and its abnormal activity is associated with various pathologies, including neurodegenerative disorders. In yeast cells lacking the VPS13 gene (vps13Δ), a model of VPS13-linked neurological diseases, we recently demonstrated that calcineurin is activated, and its downregulation reduces the negative effects associated with vps13Δ mutation. Here, we show that overexpression of the RCN2 gene, which encodes a negative regulator of calcineurin, is beneficial for vps13Δ cells. We studied the molecular mechanism underlying this effect through site-directed mutagenesis of RCN2. The interaction of the resulting Rcn2 variants with a MAPK kinase, Slt2, and subunits of calcineurin was tested. We show that Rcn2 binds preferentially to Cmp2, one of two alternative catalytic subunits of calcineurin, and partially inhibits calcineurin. Rcn2 ability to bind to and reduce the activity of calcineurin was important for the suppression. The binding of Rcn2 to Cmp2 requires two motifs in Rcn2: the previously characterized C-terminal motif and a new N-terminal motif that was discovered in this study. Altogether, our findings can help to better understand calcineurin regulation and to develop new therapeutic strategies against neurodegenerative diseases based on modulation of the activity of selected calcineurin isoforms.
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Faravelli I, Velardo D, Podestà MA, Ponticelli C. Immunosuppression-related neurological disorders in kidney transplantation. J Nephrol 2021; 34:539-555. [PMID: 33481222 PMCID: PMC8036223 DOI: 10.1007/s40620-020-00956-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 12/27/2020] [Indexed: 01/06/2023]
Abstract
A large number of neurological disorders can affect renal transplant recipients, potentially leading to disabling or life-threatening complications. Prevention, early diagnosis and appropriate management of these conditions are critical to avoid irreversible lesions. A pivotal role in the pathogenesis of common post-transplant neurological disorders is played by immunosuppressive therapy. The most frequently administered regimen consists of triple immunosuppression, which comprises a calcineurin inhibitor (CNI), a purine synthesis inhibitor and glucocorticoids. Some of these immunosuppressive drugs may lead to neurological signs and symptoms through direct neurotoxic effects, and all of them may be responsible for the development of tumors or opportunistic infections. In this review, after a brief summary of neurotoxic pathogenetic mechanisms encompassing recent advances in the field, we focus on the clinical presentation of more common and severe immunosuppression-related neurological complications, classifying them by characteristics of urgency and anatomic site. Our goal is to provide a general framework that addresses such clinical issues with a multidisciplinary approach, as these conditions require.
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Affiliation(s)
- Irene Faravelli
- Neuroscience Section, Department of Pathophysiology and Transplantation (DEPT), Dino Ferrari Centre, Università degli Studi di Milano, Milan, Italy.
| | - Daniele Velardo
- Neurology Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Manuel Alfredo Podestà
- Renal Division, ASST Santi Paolo e Carlo, Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
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Maximova N, Marcuzzi A, Del Rizzo I, Zanon D, Maestro A, Barbi E, Sala R. Standard treatment-refractory cytomegalovirus encephalitis unmasked by immune reconstitution inflammatory syndrome and successfully treated with virus-specific hyperimmune globulin. Clin Transl Immunology 2020; 9:e1201. [PMID: 33235734 PMCID: PMC7670254 DOI: 10.1002/cti2.1201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 09/23/2020] [Accepted: 10/02/2020] [Indexed: 01/21/2023] Open
Abstract
Objectives Cytomegalovirus (CMV)‐related encephalitis is a rare but potentially life‐threatening complication of CMV infection in immunocompromised patients. The high mortality rate is associated with deficient immune system reconstitution after hematopoietic stem cell transplant (HSCT) and poor bioavailability of antiviral drugs in cerebrospinal fluid (CSF). CMV‐related central nervous system (CNS) infection may occur with aspecific symptoms, without evidence of either blood viral load or magnetic resonance imaging (MRI) signs of encephalitis. Methods Here, we describe a 10‐year‐old girl who underwent an allogeneic HSCT and subsequently developed CMV encephalitis. Because of the absence of CMV antigen in the blood, the diagnosis of encephalitis was proposed only after a delay, following the onset of immune reconstitution inflammatory syndrome (IRIS). Two months of combined dual antiviral therapy with ganciclovir and foscarnet proved ineffective against CMV and caused significant bone marrow and renal toxicity. To avoid further toxicity, the girl was given daily treatment with CMV‐hyperimmune globulins alone. Results After three weeks, the CSF viral load dropped significantly and was undetectable within three more weeks. In the meantime, the renal impairment resolved, and there was a complete bone marrow recovery. Conclusion We suggest that this patient succeeded in achieving CMV CSF clearance with high dose of CMV‐hyperimmune globulin, given alone, because of the ability of immunoglobulins to penetrate the blood–brain barrier (BBB).
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Affiliation(s)
- Natalia Maximova
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy
| | | | | | - Davide Zanon
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy
| | - Alessandra Maestro
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy
| | - Egidio Barbi
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy.,University of Trieste Trieste Italy
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Khilari M, Panigrahi N. Tacrolimus induced diffuse pontine hyperintensity in status epilepticus: a rare entity. ADVANCES IN CLINICAL NEUROSCIENCE & REHABILITATION 2020. [DOI: 10.47795/nblh2485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Posterior Reversible Encephalopathy Syndrome resulting from the hypertension-induced Failure of cerebral autoregulation, is a well-described neuro-imaging finding resulting from vasogenic oedema. Pontine Hyperintensities resulting from this condition need recognition to prognosticate and avoid unnecessary investigations. We report a 48 year old male with chronic diabetes mellitus, Hypertension, and chronic kidney disease, and history of liver transplantation who presented with established status epilepticus. He was on Tacrolimus for prophylaxis for graft rejection. His MRI brain showed diffuse pontine and predominantly left thalamic hyperintensity, which suggested the diagnosis of central PRES. His evaluation for CNS infections and autoimmune encephalitis was negative. On stopping Tacrolimus, the imputed drug, and control of hypertension, along with dialysis, and symptomatic management for seizures, a complete recovery was observed over one week. Repeat MRI also showed partial regression of the pontine hyperintensity. This report documents the importance of this less described neuroradiological finding that can change the management significantly and have a bearing on the prognosis.
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Matos MS, Anastácio JD, Allwood JW, Carregosa D, Marques D, Sungurtas J, McDougall GJ, Menezes R, Matias AA, Stewart D, dos Santos CN. Assessing the Intestinal Permeability and Anti-Inflammatory Potential of Sesquiterpene Lactones from Chicory. Nutrients 2020; 12:E3547. [PMID: 33228214 PMCID: PMC7699524 DOI: 10.3390/nu12113547] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/12/2020] [Accepted: 11/16/2020] [Indexed: 12/16/2022] Open
Abstract
Cichorium intybus L. has recently gained major attention due to large quantities of health-promoting compounds in its roots, such as inulin and sesquiterpene lactones (SLs). Chicory is the main dietary source of SLs, which have underexplored bioactive potential. In this study, we assessed the capacity of SLs to permeate the intestinal barrier to become physiologically available, using in silico predictions and in vitro studies with the well-established cell model of the human intestinal mucosa (differentiated Caco-2 cells). The potential of SLs to modulate inflammatory responses through modulation of the nuclear factor of activated T-cells (NFAT) pathway was also evaluated, using a yeast reporter system. Lactucopicrin was revealed as the most permeable chicory SL in the intestinal barrier model, but it had low anti-inflammatory potential. The SL with the highest anti-inflammatory potential was 11β,13-dihydrolactucin, which inhibited up to 54% of Calcineurin-responsive zinc finger (Crz1) activation, concomitantly with the impairment of the nuclear accumulation of Crz1, the yeast orthologue of human NFAT.
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Affiliation(s)
- Melanie S. Matos
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
| | - José D. Anastácio
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - J. William Allwood
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Diogo Carregosa
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - Daniela Marques
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - Julie Sungurtas
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Gordon J. McDougall
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Regina Menezes
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
| | - Ana A. Matias
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
| | - Derek Stewart
- Plant Biochemistry and Food Quality Group, Environmental and Biochemical Sciences, The James Hutton Institute, Dundee DD2 5DA, UK; (J.W.A.); (J.S.); (G.J.M.); (D.S.)
| | - Cláudia Nunes dos Santos
- Instituto de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal; (M.S.M.); (J.D.A.); (D.C.); (R.M.); (A.A.M.)
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal;
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Meena P, Bhargava V, Rana D, Bhalla A, Gupta A. An Approach to Neurological Disorders in a Kidney Transplant Recipient. KIDNEY360 2020; 1:837-844. [PMID: 35372958 DOI: 10.34067/kid.0002052020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 06/11/2020] [Indexed: 11/27/2022]
Abstract
Kidney transplantation is the preferred treatment modality in patients with ESKD. However, there are associated complications that arise from immunosuppressive medications, infections, and associated comorbidities. Neurologic disorders frequently develop in patients who have received a kidney transplant, which in turn increases the associated morbidity and mortality. This review discusses the common neurologic disorders after kidney transplantation, including infections, cognitive decline, drug-related conditions, malignancy, seizure, and other neurologic complications.
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Bhowmick SS, Lang AE. Movement Disorders and Renal Diseases. Mov Disord Clin Pract 2020; 7:763-779. [PMID: 33043074 DOI: 10.1002/mdc3.13005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/03/2020] [Accepted: 06/05/2020] [Indexed: 02/06/2023] Open
Abstract
Movement disorders often emerge from the interplay of complex pathophysiological processes involving the kidneys and the nervous system. Tremor, myoclonus, ataxia, chorea, and parkinsonism can occur in the context of renal dysfunction (azotemia and electrolyte abnormalities) or they can be part of complications of its management (dialysis and renal transplantation). On the other hand, myoglobinuria from rhabdomyolysis in status dystonicus and certain drugs used in the management of movement disorders can cause nephrotoxicity. Distinct from these well-recognized associations, it is important to appreciate that there are several inherited and acquired disorders in which movement abnormalities do not occur as a consequence of renal dysfunction or vice versa but are manifestations of common pathophysiological processes affecting the nervous system and the kidneys. These disorders are the emphasis of this review. Increasing awareness of these conditions among neurologists may help them to identify renal involvement earlier, take timely intervention by anticipating complications and focus on therapies targeting common mechanisms in addition to symptomatic management of movement disorders. Recognition of renal impairment in a patient with complex neurological presentation may narrow down the differentials and aid in reaching a definite diagnosis.
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Affiliation(s)
- Suvorit S Bhowmick
- Division of Neurology, Department of Medicine, Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital University Health Network Toronto Ontario Canada
| | - Anthony E Lang
- Division of Neurology, Department of Medicine, Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital University Health Network Toronto Ontario Canada
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CYP3A5 Genotype as a Potential Pharmacodynamic Biomarker for Tacrolimus Therapy in Ulcerative Colitis in Japanese Patients. Int J Mol Sci 2020; 21:ijms21124347. [PMID: 32570960 PMCID: PMC7352351 DOI: 10.3390/ijms21124347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 12/14/2022] Open
Abstract
Tacrolimus has been used to induce remission in patients with steroid-refractory ulcerative colitis. It poses a problem of large individual differences in dosage necessary to attain target blood concentration and, often, this leads to drug inefficacy. We examined the difference in mRNA expression levels of ATP binding cassette transporter B1 (ABCB1) between inflamed and non-inflamed tissues, and the influence of CYP3A5 genotype on tacrolimus therapy. The mRNA expression of CYP3A4 in colonic mucosa and that of cytochrome p450 3A5 (CYP3A5) and ABCB1 in inflamed and non-inflamed areas were examined in 14 subjects. The mRNA expression levels of CYP3A5 were higher than that of CYP3A4. The mRNA expression of ABCB1 was lower in the inflamed than in the non-inflamed mucosa, despite that of CYP3A5 mRNA level being not significantly changed. Hence, the deterioration of the disease is related to the reduction of the barrier in the inflamed mucosa. The relationship between CYP3A5 genotype and blood concentration, dose, and concentration/dose (C/D) ratio of tacrolimus in 15 subjects was studied. The tacrolimus dose to maintain equivalent blood concentrations was lower in CYP3A5*3/*3 than in CYP3A5*1 carriers, and the C/D ratio was significantly higher in the latter. Thus, CYP3A5 polymorphism information played a role in determining the initial dose of tacrolimus. Furthermore, since the effect of tacrolimus appears earlier in CYP3A5*3/*3 than in CYP3A5*1/*1 and *1/*3, it seems necessary to change the evaluation time of therapeutic effect by CYP3A5 genotype. Additionally, the relationship between CYP3A5 genotype and C/D ratio of tacrolimus in colonic mucosa was investigated in 10 subjects. Tacrolimus concentration in the mucosa was two-fold higher in CYP3A5*3/*3 than in CYP3A5*1 carriers, although no significant difference in tacrolimus-blood levels was observed. Therefore, the local concentration of tacrolimus affected by CYP3A5 polymorphism might be related to its therapeutic effect.
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Hörbelt T, Kahl AL, Kolbe F, Hetze S, Wilde B, Witzke O, Schedlowski M. Dose-Dependent Acute Effects of Everolimus Administration on Immunological, Neuroendocrine and Psychological Parameters in Healthy Men. Clin Transl Sci 2020; 13:1251-1259. [PMID: 32475067 PMCID: PMC7719391 DOI: 10.1111/cts.12812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 04/29/2020] [Indexed: 12/30/2022] Open
Abstract
The rapamycin analogue everolimus (EVR) is a potent inhibitor of the mammalian target of rapamycin (mTOR) and clinically used to prevent allograft rejections as well as tumor growth. The pharmacokinetic and immunosuppressive efficacy of EVR have been extensively reported in patient populations and in vitro studies. However, dose-dependent ex vivo effects upon acute EVR administration in healthy volunteers are rare. Moreover, immunosuppressive drugs are associated with neuroendocrine changes and psychological disturbances. It is largely unknown so far whether and to what extend EVR affects neuroendocrine functions, mood, and anxiety in healthy individuals. Thus, in the present study, we analyzed the effects of three different clinically applied EVR doses (1.5, 2.25, and 3 mg) orally administered 4 times in a 12-hour cycle to healthy male volunteers on immunological, neuroendocrine, and psychological parameters. We observed that oral intake of medium (2.25 mg) and high doses (3 mg) of EVR efficiently suppressed T cell proliferation as well as IL-10 cytokine production in ex vivo mitogen-stimulated peripheral blood mononuclear cell. Further, acute low (1.5 mg) and medium (2.25 mg) EVR administration increased state anxiety levels accompanied by significantly elevated noradrenaline (NA) concentrations. In contrast, high-dose EVR significantly reduced plasma and saliva cortisol as well as NA levels and perceived state anxiety. Hence, these data confirm the acute immunosuppressive effects of the mTOR inhibitor EVR and provide evidence for EVR-induced alterations in neuroendocrine parameters and behavior under physiological conditions in healthy volunteers.
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Affiliation(s)
- Tina Hörbelt
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Anna Lena Kahl
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Frederike Kolbe
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Susann Hetze
- Clinic of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Benjamin Wilde
- Department of Nephrology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Oliver Witzke
- Department of Nephrology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.,Department of Infectious Diseases, West German Centre of Infectious Diseases, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Manfred Schedlowski
- Institute of Medical Psychology and Behavioral Immunobiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.,Department of Clinical Neuroscience, Osher Center for Integrative Medicine, Karolinska Institutet, Stockholm, Sweden
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Ho S, Giddie J, Dhatariya KK. BILATERAL NEUROARTHROPATHY 11 YEARS AFTER SIMULTANEOUS PANCREAS-KIDNEY TRANSPLANT FOR TYPE 1 DIABETES MELLITUS. AACE Clin Case Rep 2020; 5:e259-e262. [PMID: 31967048 DOI: 10.4158/accr-2018-0408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 12/23/2018] [Indexed: 11/15/2022] Open
Abstract
Objective To report a case of a man who developed bilateral Charcot arthropathic feet 11 years after a simultaneous pancreas-kidney transplant (SPKT) for type 1 diabetes mellitus (DM). The patient had remained normoglycemic after surgery. Methods We present a retrospective review of the case notes and serial imaging. Results The patient developed dense peripheral diabetic neuropathy due to poor glycemic control. His biochemical markers of DM all normalized following SPKT, and he was discharged by his primary and secondary care diabetes services. Eleven years later, he developed Charcot arthropathy in one foot and, within a month, the other foot as well. Conclusion Individuals with DM who had preoperative end organ diabetes-related damage who went into biochemical remission after SPKT may be at risk for future complications. They should not be discharged from specialist diabetes services, and they need continued education about foot care.
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Farouk SS, Rein JL. The Many Faces of Calcineurin Inhibitor Toxicity-What the FK? Adv Chronic Kidney Dis 2020; 27:56-66. [PMID: 32147003 DOI: 10.1053/j.ackd.2019.08.006] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 08/01/2019] [Indexed: 02/07/2023]
Abstract
Calcineurin inhibitors (CNIs) are both the savior and Achilles' heel of kidney transplantation. Although CNIs have significantly reduced rates of acute rejection, their numerous toxicities can plague kidney transplant recipients. By 10 years, virtually all allografts will have evidence of CNI nephrotoxicity. CNIs have been strongly associated with hypertension, dyslipidemia, and new onset of diabetes after transplantation-significantly contributing to cardiovascular risk in the kidney transplant recipient. Multiple electrolyte derangements including hyperkalemia, hypomagnesemia, hypercalciuria, metabolic acidosis, and hyperuricemia may be challenging to manage for the clinician. Finally, CNI-associated tremor, gingival hyperplasia, and defects in hair growth can have a significant impact on the transplant recipient's quality of life. In this review, the authors briefly discuss the pharmacokinetics of CNI and discuss the numerous clinically relevant toxicities of commonly used CNIs, cyclosporine and tacrolimus.
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Lee HG, Kim LK, Choi JM. NFAT-Specific Inhibition by dNP2-VIVITAmeliorates Autoimmune Encephalomyelitisby Regulation of Th1 and Th17. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2019; 16:32-41. [PMID: 31737742 PMCID: PMC6849366 DOI: 10.1016/j.omtm.2019.10.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 10/16/2019] [Indexed: 11/26/2022]
Abstract
Nuclear factor of activated T cells (NFATs) is an important transcription factor for T cell activation and proliferation. Recent studies have highlighted the role of NFATs in regulating the differentiation of effector CD4 T helper (Th) subsets including Th1 and Th17 cells. Because controlling the effector T cell function is important for the treatment of autoimmune diseases, regulation of NFAT functions in T cells would be an important strategy to control the pathogenesis of autoimmune diseases. Here, we demonstrated that an NFAT inhibitory peptide, VIVIT conjugated to dNP2 (dNP2-VIVIT), a blood-brain barrier-permeable peptide, ameliorated experimental autoimmune encephalomyelitis (EAE) by inhibiting Th1 and Th17 cells, but not regulatory T (Treg) cells. dNP2-VIVIT negatively regulated spinal cord-infiltrating interleukin-17A (IL-17A) and interferon (IFN)-γ-producing CD4+ T cells without affecting the number of Foxp3+ CD4+ Treg cells, whereas dNP2-VEET or 11R-VIVIT could not significantly inhibit EAE. In comparison with cyclosporin A (CsA), dNP2-VIVIT selectively inhibited Th1 and Th17 differentiation, whereas CsA inhibited the differentiation of all T cell subsets including that of Th2 and Treg cells. Collectively, this study demonstrated the role of dNP2-VIVIT as a novel agent for the treatment of autoimmune diseases such as multiple sclerosis by regulating the functions of Th1 and Th17 cells.
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Affiliation(s)
- Hong-Gyun Lee
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea.,Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Li-Kyung Kim
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea.,Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Je-Min Choi
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea.,Research Institute for Natural Sciences, Hanyang University, Seoul, Republic of Korea.,Research Institute for Convergence of Basic Sciences, Hanyang University, Seoul, Republic of Korea
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Abstract
Neurologic disturbances including encephalopathy, seizures, and focal deficits complicate the course 10-30% of patients undergoing organ or stem cell transplantation. While much or this morbidity is multifactorial and often associated with extra-cerebral dysfunction (e.g., graft dysfunction, metabolic derangements), immunosuppressive drugs also contribute significantly. This can either be through direct toxicity (e.g., posterior reversible encephalopathy syndrome from calcineurin inhibitors such as tacrolimus in the acute postoperative period) or by facilitating opportunistic infections in the months after transplantation. Other neurologic syndromes such as akinetic mutism and osmotic demyelination may also occur. While much of this neurologic dysfunction may be reversible if related to metabolic factors or drug toxicity (and the etiology is recognized and reversed), cases of multifocal cerebral infarction, hemorrhage, or infection may have poor outcomes. As transplant patients survive longer, delayed infections (such as progressive multifocal leukoencephalopathy) and post-transplant malignancies are increasingly reported.
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Wang Y, Peiffer BJ, Su Q, Liu JO. One-step Heck Reaction Generates Nonimmunosuppressive FK506 Analogs for Pharmacological BMP Activation. ACS Med Chem Lett 2019; 10:1279-1283. [PMID: 31531197 PMCID: PMC6746090 DOI: 10.1021/acsmedchemlett.9b00144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 08/19/2019] [Indexed: 11/30/2022] Open
Abstract
FKBP12 ligands such as FK506 have been shown to activate the BMP signaling pathway and facilitate tissue regeneration. However, the immunosuppressive activity of FK506 limits its clinical application. Using Heck reaction, we generated nonimmunosuppressive analogs of FK506 by fusing heterocycles to the calcineurin (CN) binding domain of FK506. Structure-activity relationships provided novel mechanistic insights into the FK506-CN interaction that can be exploited for rational design of future analogs.
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Affiliation(s)
- Yuefan Wang
- Department
of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine and the SJ Yan and HJ Mao Laboratory
of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Brandon J. Peiffer
- Department
of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine and the SJ Yan and HJ Mao Laboratory
of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Qi Su
- Department
of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Jun O. Liu
- Department
of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine and the SJ Yan and HJ Mao Laboratory
of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
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Recent Topics on The Mechanisms of Immunosuppressive Therapy-Related Neurotoxicities. Int J Mol Sci 2019; 20:ijms20133210. [PMID: 31261959 PMCID: PMC6651704 DOI: 10.3390/ijms20133210] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 02/07/2023] Open
Abstract
Although transplantation procedures have been developed for patients with end-stage hepatic insufficiency or other diseases, allograft rejection still threatens patient health and lifespan. Over the last few decades, the emergence of immunosuppressive agents such as calcineurin inhibitors (CNIs) and mammalian target of rapamycin (mTOR) inhibitors have strikingly increased graft survival. Unfortunately, immunosuppressive agent-related neurotoxicity commonly occurs in clinical practice, with the majority of neurotoxicity cases caused by CNIs. The possible mechanisms through which CNIs cause neurotoxicity include increasing the permeability or injury of the blood–brain barrier, alterations of mitochondrial function, and alterations in the electrophysiological state. Other immunosuppressants can also induce neuropsychiatric complications. For example, mTOR inhibitors induce seizures, mycophenolate mofetil induces depression and headaches, methotrexate affects the central nervous system, the mouse monoclonal immunoglobulin G2 antibody (used against the cluster of differentiation 3) also induces headaches, and patients using corticosteroids usually experience cognitive alteration. Therapeutic drug monitoring, individual therapy based on pharmacogenetics, and early recognition of symptoms help reduce neurotoxic events considerably. Once neurotoxicity occurs, a reduction in the drug dosage, switching to other immunosuppressants, combination therapy with drugs used to treat the neuropsychiatric manifestation, or blood purification therapy have proven to be effective against neurotoxicity. In this review, we summarize recent topics on the mechanisms of immunosuppressive drug-related neurotoxicity. In addition, information about the neuroprotective effects of several immunosuppressants is also discussed.
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Influence of Tacrolimus on Depressive-Like Behavior in Diabetic Rats Through Brain-Derived Neurotrophic Factor Regulation in the Hippocampus. Neurotox Res 2019; 36:396-410. [PMID: 31201731 DOI: 10.1007/s12640-019-00062-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 12/20/2022]
Abstract
The neurotoxicity of immunosuppressive agents and diabetes mellitus are known risk factors of neurological complications in kidney transplant recipients. The aim of the present study was to investigate the influence of tacrolimus on brain-derived neurotrophic factor (BDNF), the critical protein for maintenance of neuronal functions, in the hippocampus in a diabetic condition. A diabetic rat model was established by a single streptozotocin injection (60 mg/kg). Control and diabetic rats then received daily tacrolimus (1.5 mg/kg per day) injections for 6 weeks. BDNF expression in the hippocampus was examined in the dentate gyrus (DG) and CA3 region using immunohistochemistry. There was a significant decrease of BDNF expression in the DG and CA3 region in tacrolimus-treated and diabetic rats compared with that of the control group injected with vehicle only. However, there was no difference in BDNF expression between the two experimental groups. Tacrolimus treatment in diabetic rats further decreased the BDNF expression level in the DG and CA3 region. Interestingly, mossy fiber sprouting, demonstrated by prominent punctate immunolabeling of BDNF with synaptoporin, was observed in the diabetic group treated with tacrolimus, which localized at the stratum oriens of the CA3 region. These data suggest that tacrolimus treatment or a diabetic condition decreases BDNF expression in the hippocampus, and that tacrolimus treatment in the diabetic condition further injures the CA3 region of the hippocampus. In addition to BDNF expression, decreased locomotor activity and evident depressive behavior were observed in tacrolimus-treated diabetic rats. Moreover, there were significant decreases of the mRNA levels of γ-aminobutyric acid and serotonin receptors in the diabetic hippocampus with tacrolimus treatment. This finding suggests that tacrolimus treatment may cause further psychiatric and neurological complications for patients with diabetes, and should thus be used with caution.
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Abstract
Renal transplant is the most common organ transplant in the United States, and the frequency of kidney transplants continues to rise as transplant offers improved survival and quality of life compared to dialysis. However, complications are not uncommon and patients frequently encounter issues requiring hospitalization, especially in the first year postoperatively. Complications that arise are typically related to surgical complications, immunosuppressive medications, or infection due to immunosuppression. Neurological complications are fairly common post-operatively, and are associated with increased morbidity and mortality in this population. This review discusses the most common etiologies of neurological complications after kidney transplant, including infection, malignancy, medication related, acute neuropathy, and other neurological pathology.
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Kornerup LS, Pflugrad H, Weissenborn K, Vilstrup H, Dam G. Cognitive impairment after liver transplantation: residual hepatic encephalopathy or posttransplant encephalopathy? Hepat Med 2019; 11:41-46. [PMID: 31040728 PMCID: PMC6456244 DOI: 10.2147/hmer.s144667] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/25/2019] [Indexed: 12/22/2022] Open
Abstract
Liver transplantation (LT) represents the definitive treatment for end-stage liver disease. Cognitive impairment following LT is frequent, referred to as postliver transplant encephalopathy (PLTE). LT removes the underlying chronic liver disease, and until recently hepatic encephalopathy (HE) was assumed to be fully reversible after LT. However, increasing evidence indicates that some degree of cognitive impairment may be present after LT. To which extent PLTE reflects cognitive impairment caused by residual HE (RHE) or the combined effect of other factors affecting brain function before, during, and after LT is not clarified. None of the available psychometric and neurophysiological tests used for detecting HE is shown to be able to distinguish between etiologies. The available, mostly retrospective, clinical studies indicate a high prevalence of abnormal psychometric tests after LT, and not all seem to recover completely. The patients with earlier HE show the most marked improvements, suggesting that the clinical picture of the early PLTE, in fact, represents RHE. Other early post-LT etiologies for PLTE comprise cerebral ischemia, critical illness encephalopathy, and immunosuppressive therapy. Late-onset etiologies comprise diabetes and hypertension, among others. PLTE regardless of etiology is a worrying issue and needs more attention in the form of mechanistic research, development of diagnostic/discriminative tools, and standardized prospective clinical studies.
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Affiliation(s)
- Linda Skibsted Kornerup
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus N, Denmark
| | - Henning Pflugrad
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | | | - Hendrik Vilstrup
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus N, Denmark
| | - Gitte Dam
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus N, Denmark
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Peiffer BJ, Qi L, Ahmadi AR, Wang Y, Guo Z, Peng H, Sun Z, Liu JO. Activation of BMP Signaling by FKBP12 Ligands Synergizes with Inhibition of CXCR4 to Accelerate Wound Healing. Cell Chem Biol 2019; 26:652-661.e4. [PMID: 30827938 DOI: 10.1016/j.chembiol.2019.01.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/04/2018] [Accepted: 01/24/2019] [Indexed: 01/05/2023]
Abstract
The combination of AMD3100 and low-dose FK506 has been shown to accelerate wound healing in vivo. Although AMD3100 is known to work by releasing hematopoietic stem cells into circulation, the mechanism of FK506 in this setting has remained unknown. In this study, we investigated the activities of FK506 in human cells and a diabetic-rat wound model using a non-immunosuppressive FK506 analog named FKVP. While FKVP was incapable of inhibiting calcineurin, wound-healing enhancement with AMD3100 was unaffected. Further study showed that both FK506 and FKVP activate BMP signaling in multiple cell types through FKBP12 antagonism. Furthermore, selective inhibition of BMP signaling abolished stem cell recruitment and wound-healing enhancement by combination treatment. These results shed new light on the mechanism of action of FK506 in acceleration of wound healing, and raise the possibility that less toxic FKBP ligands such as FKVP can replace FK506 for the treatment of chronic wounds.
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Affiliation(s)
- Brandon J Peiffer
- Department of Pharmacology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Le Qi
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Ali R Ahmadi
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Yuefan Wang
- Department of Pharmacology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Zufeng Guo
- Department of Pharmacology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Hanjing Peng
- Department of Pharmacology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Zhaoli Sun
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA.
| | - Jun O Liu
- Department of Pharmacology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; The SJ Yan and HJ Mao Laboratory of Chemical Biology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA.
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