TITLE:
Cascading Pathways in Autism: A New Clinical Lens on Early Diagnosis and Pediatric Intervention
AUTHORS:
Nuriye Sinem Berthier
KEYWORDS:
Autism Spectrum Disorder, Β-Casomorphin-7, Microbiome, Neuroimmune Activation, Blood-Brain Barrier, Prevention, Pediatric Preventive Care
JOURNAL NAME:
Open Journal of Pediatrics,
Vol.15 No.6,
October
31,
2025
ABSTRACT: Background: Autism spectrum disorder (ASD) can arise from interconnected biological pathways linking diet, the gut microbiome, barrier integrity, and neuroimmune activation. Objective: We present the autism cascade hypothesis, proposing that the digestion of A1 β-casein releases β-casomorphin7 (BCM7). Reduced microbial dipeptidyl peptidase IV activity prolongs systemic BCM7 exposure. At the same time, dysbiosis-induced barrier permeability facilitates the translocation of peptides and cytokines into the developing brain, priming microglial activation and altering neurodevelopmental signaling. Methods: This conceptual paper synthesizes evidence from pediatric nutrition, microbiology, immunology, and neurology studies to evaluate the mechanistic plausibility and clinical relevance of this hypothesis. Results: The model identified a high-risk infant profile and outlined early-life strategies, including dietary guidance, gastrointestinal health assessment, and microbiome support, as potential means to modulate neuroimmune responses during critical developmental stages. Conclusions: By framing the gut-brain axis as a modifiable pathway, this hypothesis encourages targeted research into nutritional, microbial, and immunomodulatory interventions that could inform preventive strategies for ASD in pediatric practice.