Abstract
Bipolar disorder (BD) has been associated with a proinflammatory state in which TNF-α seems to play a relevant role. The aim of the present study was to evaluate the plasma levels of TNF-α and its soluble receptors (sTNFR1 and sTNFR2) in BD patients in mania and euthymia in comparison with control subjects. We evaluated 53 BD patients (34 in mania and 19 in euthymia) and 38 healthy subjects. All subjects were assessed by the Mini-International Neuropsychiatry Interview (MINI-Plus). Patients were also evaluated by the Young Mania Rating Scale (YMRS) and by Hamilton Depression Rating Scale (HDRS). Plasma TNF-α and its soluble receptors were measured by ELISA. The plasma TNF-α and sTNFR2 levels did not differ between groups, but higher sTNFR1 levels were found in BD patients. Of note, BD patients in mania had higher sTNFR1 levels than BD patients in euthymia and controls. The sTNFR1 and sTNFR2 levels correlated with BD duration, and sTNFR2 levels correlated with age of patients. Our data indicate a proinflammatory status in BD patients during mania and further suggest that inflammatory mechanisms may be involved with the physiopathology of BD.
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