15% among men and up to 25% among women. In recent years the association of immune
system alterations and MDD has been investigated. Assessments of immu-nologic and
inflammatory responses in these patients enhance our knowledge of the eti-ology and
pathogenesis of this disease. Objective: To investigate the changes in immu-noglobulin and
cytokine serum levels and lymphocyte subsets in patients with MDD. Methods: We studied …