Attenuating neuropsychiatric disorders of early-life stress: The protective role of oxytocin

Table 1 Comparative summary of key preclinical and clinical evidence for oxytocin’s effects on early-life stress -related outcomes

Domain/system	Preclinical findings (rodent models)	Human studies (intranasal oxytocin)	Key convergences & divergences
Amygdala reactivity & connectivity	Reduces BLA hyperactivity; strengthens amygdala-mPFC connectivity[77,78]	Attenuates amygdala hyperreactivity to threat; enhances amygdala-PFC functional connectivity[110,114,117]	Strong convergence: OT consistently normalizes amygdala-centric threat circuits across species
HPA axis function	Attenuates stress-induced corticosterone release; improves GR feedback sensitivity[32,98]	Context-dependent blunting of cortisol response; effects more pronounced with supportive context[28,82,167]	Divergence/complexity: Effects in humans are less robust and more dependent on psychological context
Social behavior	Rescues social preference and social memory deficits[101,102]	Enhances trust, eye contact, and emotion recognition; effects strongest in ELS-exposed[36,37,127]	Convergence: OT promotes prosocial behaviors. Divergence: Human effects are highly sensitive to perceived trustworthiness of others
Epigenetic modulation	Normalizes methylation of NR3C1 and OXTR genes in limbic regions[90,91]	OXTR methylation status moderates behavioral and neural response to OT[121,122]	Emerging convergence: Epigenetic state of the oxytocin system is a key moderator of treatment response
Key moderators	Sex, timing, dose, specific ELS paradigm[32,154]	Sex, ELS type, OXTR genotype/methylation, therapeutic context[28,93,124,157]	Strong Convergence: Efficacy is universally moderated by individual differences and context, not a one-size-fits-all
Amygdala reactivity & connectivity	Reduces BLA hyperactivity; strengthens amygdala-mPFC connectivity[77,78]	Attenuates amygdala hyperreactivity to threat; enhances amygdala-PFC functional connectivity[110,114,117]	Strong convergence: OT consistently normalizes amygdala-centric threat circuits across species
HPA axis function	Attenuates stress-induced corticosterone release; improves GR feedback sensitivity[32,98]	Context-dependent blunting of cortisol response; effects more pronounced with supportive context[28,82,167]	Divergence/Complexity: Effects in humans are less robust and more dependent on psychological context

ALS: Attachment trauma; BLA: Basolateral amygdala; ELS: Early-life stress; GR: Glucocorticoid receptor; HPA: Hypothalamic-pituitary-adrenal; mPFC: Medial prefrontal cortex; OT: Oxytocin.