Scientists just mapped the genetic blueprint of OCD and Tourette's. A Rutgers-led international collaboration, publishing in Nature Neuroscience, has identified 36 genes that substantially raise the risk for obsessive-compulsive disorder (OCD) and chronic tic disorders — the most detailed biological picture of these conditions to date. The study analyzed DNA from nearly 4,000 affected individuals using whole-exome sequencing, comparing their gene sequences to those of parents and unaffected controls.

Many of the newly discovered genes are shared between OCD and tic disorders, helping explain why the two conditions so often co-occur in the same individuals and families. Several genes also overlap with those previously linked to autism and schizophrenia, reinforcing the idea that multiple psychiatric conditions may stem from related disruptions in brain development. Key risk genes appear active in brain regions governing movement, decision-making, and habit formation — including the cortex and striatum.

Key Takeaways:

• Over 30 new genetic targets have been identified, dramatically expanding opportunities for drug development
• Genes act in networks, meaning therapies could potentially target entire biological pathways rather than single genes
• Findings could shift treatment focus from symptom management to addressing underlying neurobiological mechanisms

Why it matters: Before this study, only a handful of genetic clues existed for OCD and tic disorders. With 36 identified genes, the pharmaceutical industry now has a far richer set of targets for developing new, mechanism-based treatments for conditions that affect millions worldwide, often starting in childhood.