AUTISM: FROM BEHAVIORAL PHENOTYPE TO A BIOLOGICAL MODEL OF ETIOLOGY, PATHOGENESIS, AND TREATMENT

[For doctors, life scientists and interested parents]
Autism Spectrum Disorder (ASD) is traditionally defined as a neurodevelopmental condition marked by social communication challenges and restricted, repetitive behaviors. While research into ASD is extensive, its causes remain mysterious. Many treatment options focus mainly on symptoms. Furthermore, commonly used behavioral and genetic explanations fall short of capturing the disorder’s vast diversity, progression, and varied effects on individuals.
Autism is diagnosed based on behavioral criteria. Yet, what truly causes these behaviors? Behavior reflects the outcome of underlying biological processes, not their origin. This distinction is crucial, as the current diagnostic framework has led to a situation in which classification is often mistaken for explanation.
Building on this distinction, despite the rapid increase in ASD prevalence, no unified etiological model has been established, and therapeutics approaches remain largely focused on behavioral modification rather than biological intervention. This disconnect reflects a broader issue in modern medicine: fragmentation across disciplines. Neurology, immunology, psychiatry, and infectious disease each address aspects of ASD, yet no integrated framework exists to connect these domains.
Against this fragmented landscape, evidence is mounting: autism extends far beyond behavioral traits. It is a complex biological disorder marked by systemic processes, particularly immune function, inflammation, and infection. Progress in understanding and treatment demands that we look past mere descriptions and instead build a framework rooted in biology and mechanism.
CURRENT THEORIES AND THEIR LIMITATIONS
Despite decades of intensive research, autism spectrum disorder (ASD) remains without a unified etiological framework. Several dominant models—genetic, neurodevelopmental, and behavioral—have contributed important insights but remain insufficient to fully...
