A cytokine study of adult patients with obsessive-compulsive disorder.
OBJECTIVE
We aimed to determine the plasma levels of cytokines in patients with obsessive-compulsive disorder (OCD) as compared with healthy controls and to investigate whether there is any association between their concentrations and OCD clinical and therapeutic features.


METHODS
Forty patients with OCD and 40 healthy controls had their plasmas assessed for a range of cytokines (tumor necrosis factor-α, or TNF-α), chemokines (CCL2, CCL3, CCL11, CCL24, CXCL8, CXCL9, CXCL10), and other mediators (TNF soluble receptors sTNFR1 and sTNFR2 and interleukin-1 receptor antagonist) by enzyme-linked immunosorbent assay. Patients with OCD were further examined with the Mini-International Neuropsychiatric Interview, the Obsessive-Compulsive Inventory-Revised, and the Beck Depression Inventory.


RESULTS
Compared with healthy controls, patients with OCD exhibited significantly increased plasma levels of CCL3, CXCL8, sTNFR1, and sTNFR2. Among patients with OCD, there was a positive correlation between relative antidepressant dose and sTNFr2 levels. Furthermore, although the levels of sTNFR1 correlated positively with the severity of washing symptoms, CCL24 levels correlated negatively with the severity of hoarding.


CONCLUSIONS
The levels of certain immune markers are increased in adult patients with OCD and seem to vary according to predominant symptoms dimensions. Other studies are required to establish whether our findings truly reflect immunologic dysfunction in OCD or are the result of other hidden confounding factors.
Anxiety and Depression Research Program, Institute of Psychiatry, Federal University of Rio de Janeiro, Botafogo, Rio de Janeiro 22290-140, Brazil. lfontenelle@gmail.com
Leonardo F
LF
Fontenelle
Izabela Guimarães
IG
Barbosa
Juliano Victor
JV
Luna
Lirlândia Pires
LP
de Sousa
Mery Natali Silva
MN
Abreu
Antonio Lucio
AL
Teixeira
D000328:Adult; D003192:Compulsive Behavior / Q000097:blood* / Q000175:diagnosis; D016207:Cytokines / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009770:Obsessive Behavior / Q000097:blood* / Q000175:diagnosis; D009771:Obsessive-Compulsive Disorder / Q000097:blood* / Q000175:diagnosis; D011569:Psychiatric Status Rating Scales; D012720:Severity of Illness Index
D016207:Cytokines