01/20/2026
2025 and 2026 have brought an incredible surge of research in epigenetics, neurodevelopmental disorders, and the neuroimmune aspects of psychiatry.
This large-scale study examines the role of chromatin in the potential development of OCD and related conditions such as Tourette syndrome. It hypothesizes that a complex interaction between genetic vulnerability (involving many genes), epigenetic mechanisms, and environmental factors (such as stress or infection) contributes to the development of OCD.
My own two cents: therapy will always remain essential. Even when the etiology is largely biological, once behaviors like compulsions, rumination, and avoidance are established, the brain builds entrenched neural pathways that become habitual. Evidenced-based methods such as exposure and Response Prevention are necessary to help rewire these circuits. Even when the medical aspects are treated, the behavioral and neural patterns that have formed often still require treatments like ERP to create lasting change.
That said, it is incredibly exciting to see science advancing toward a clearer understanding of what is happening in the brain, which has historically been relatively mysterious organ compared to other parts of the body. The possibility of interventions that could address shared mechanisms across conditions such as ADHD, Tourette syndrome, OCD, and the immune-related components seen in PANS/PANDAS is especially promising.
If we can move toward treatments that target a component of the underlying biological and neuroimmune processes (rather than continuing siloed care based solely on symptom categories) the potential impact for individuals and families would be truly phenomenal.
Read the study here:
Background Obsessive Compulsive Disorder (OCD) affects 2 to 3% of the population and is marked by intrusive thoughts and repetitive behaviours. OCD is increasingly recognized as a polygenic disorder involving gene-environment interactions, with genetic risk largely driven by common variants and a sm...