Plasma Interleukin-1β and Tumor Necrosis Factor Concentrations in Obsessive–Compulsive Disorders

Plasma interleukin-1β (Il-1β) and tumor necrosis factor-α (TNF-α) concentrations were measured twice, at a 48-hour interval, in 27 drug-free obsessive–compulsive patients (12 women and 15 men) and in 27 sex–age-matched healthy controls. Il-1β and TNF-α concentrations were significantly lower in patients than in controls, whereas there were no differences in either group between men and women, between the samples of the two days, or, in the patients, between those who had and those who had not been previously treated with psychopharmacologic drugs.