An overview of oxytocin integrative mechanisms in autism spectrum disorder

Autism Spectrum Disorder (ASD) is a multifaceted neurodevelopmental condition characterized by impairments in social interaction, communication, and repetitive behaviors. Its etiology involves a complex interplay of genetic, environmental, and neurobiological factors. The oxytocin (OT) system, central to social behavior and emotional regulation, has emerged as a key area of interest in ASD research. This review synthesizes current evidence, highlighting that dysregulation of OT and its receptor (OTR) signaling, often characterized by lower baseline OT levels and altered OTR expression due to genetic and epigenetic factors, contributes to the social and behavioral deficits observed in ASD. While aberrant OT/OTR signaling presents a potential target for therapeutic intervention, the narrative has evolved beyond simple peptide replacement. Critical analysis reveals that intranasal OT administration, as a standalone treatment, yields inconsistent results due to its non-specific delivery and inability to address core circuit-level dysfunctions established during neurodevelopment. Promising future avenues include the development of selective OTR agonists, epigenetic modulation to correct OTR expression, and the use of OT as a targeted adjunct to enhance behavioral therapy efficacy. This paper provides a comprehensive and critical overview of the integrative mechanisms linking OT/OTR signaling to ASD, evaluates the therapeutic potential of correcting this pathway, and emphasizes the necessity for personalized, biomarker-driven approaches to improve social cognition and neural connectivity in individuals with ASD.