
25/09/2025
A 2025 study published in Cell by Dr. Hyejung Won and colleagues provides groundbreaking insight into the genetic and molecular origins of several psychiatric disorders.
By analyzing brain tissue and gene expression data from thousands of individuals, the researchers found that eight different neuropsychiatric conditions—including autism, ADHD, schizophrenia, bipolar disorder, depression, OCD, Tourette’s syndrome, and anorexia nervosa—share disruptions in a common molecular pathway.
Specifically, the study focuses on the developmental gene network responsible for regulating synaptic plasticity—the brain’s ability to adapt and reorganize neural connections.
This pathway was found to be commonly disrupted across these eight conditions, despite their wide differences in clinical presentation.
The researchers used single-cell RNA sequencing and integrative genomics to show that this common disruption originates prenatally in a specific subtype of excitatory neurons, impacting how neurons communicate and organize during fetal brain development.
This shared "molecular signature" helps explain why these disorders often overlap in symptoms, risk factors, and even treatment responses.
It also supports the idea of rethinking traditional diagnostic boundaries, encouraging more biologically informed classification systems for mental health.
While more research is needed to understand how these shared genetic signatures translate into distinct clinical outcomes, this work is a major step toward unifying psychiatric diagnoses under common biological frameworks—which could improve early detection and personalized treatment strategies.
Key points:
- Eight psychiatric conditions share a common neurodevelopmental pathway.
- Origin likely lies in prenatal disruptions to excitatory neurons.
- Study used large-scale genomic and single-cell data.
- Published in Cell in 2025 by Won et al.