Pol-Fuster J., Fernández de la Cruz L., Beucke J., Hesselmark E., Crowley J.J., de Schipper E., Brikell I., Chang Z., D’Onofrio B.M., Larsson H., Lichtenstein P., Kuja-Halkola, R. & Mataix-Cols D., A population-based multigenerational family co-aggregation study of severe infections and obsessive-compulsive disorder, Biological Psychiatry (2024), doi: https://doi.org/10.1016/ j.biopsych.2024.09.004.
This large population-based study in Sweden investigated the potential link between severe infections and obsessive-compulsive disorder (OCD) through a familial co-aggregation approach. By analyzing data from over 4.9 million individuals born between 1960 and 2008, researchers explored the risk of OCD among relatives of those with severe infections, spanning varying degrees of genetic relatedness. The study found that the risk of OCD increased with closer genetic ties, with monozygotic twins showing the highest correlation. A dose-response relationship between the number of infections and the odds of OCD was also identified. These findings remained robust even after adjusting for comorbid autoimmune disorders and infections in relatives. The results suggest that genetic factors play a significant role in the observed association, pointing to shared genetic susceptibilities between infections and OCD. This supports the idea that genetic pleiotropy—where the same genes influence multiple traits—may contribute to both infection susceptibility and OCD risk. The study highlights the importance of considering both genetic and environmental factors in understanding OCD development.
Gabriella True
