Enigma of autism regression mechanistic pathways, clinical phenotypes, and early intervention implications
Abstract
Autism regression, defined by the loss of previously acquired social, communicative, and language skills, affects approximately 25%-30% of children on the autism spectrum, most commonly emerging between 12 months and 30 months of age. Once debated as a potential artifact of parental recall or observation bias, contemporary evidence-including home-video analyses and prospective sibling studies-establishes regression as a biologically grounded neurodevelopmental deviation rather than a psychogenic phenomenon. This review presents an integrated model of regression, conceptualizing it as a "neurobiological crisis" in which the convergence of physiological stressors unmasks latent genetic vulnerabilities during a critical period of brain reorganization. Central mechanistic pathways include excessive synaptic pruning, excitatory-inhibitory imbalance, neuroinflammation, mitochondrial dysfunction, and dysbiosis of the gut-brain axis. From a clinical perspective, the period immediately following skill loss represents a window of heightened neuroplasticity. Pediatricians are urged to move beyond a "wait-and-see" approach, adopting a dual-track strategy that combines rapid medical and genetic evaluation to exclude pathological mimics (e.g., Landau-Kleffner syndrome, metabolic disorders) and to initiate immediate intensive behavioral and developmental interventions. Leveraging naturalistic developmental and behavioral interventions, as well as and parent-mediated strategies, many…
Read the paper
Related studies
- Tryptophan Metabolism and Gut-Brain Homeostasis
- Rationale for a Multi-Factorial Approach for the Reversal of Cognitive Decline in Alzheimer’s Disease and MCI: A Review
- Prioritized Research for the Prevention, Treatment, and Reversal of Chronic Disease: Recommendations From the Lifestyle Medicine Research Summit
- Relationship between sleep disorders and gut dysbiosis: what affects what?
- The role of CLOCK gene in psychiatric disorders: Evidence from human and animal research
- Genetic, Transcriptome, Proteomic, and Epidemiological Evidence for Blood-Brain Barrier Disruption and Polymicrobial Brain Invasion as Determinant Factors in Alzheimer’s Disease
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.