title: Increased numbers of CD5+ B lymphocytes in schizophrenic patients.
abstract: Autoimmune mechanisms have been postulated to play a role in the pathogenesis of schizophrenia. Recently, increased numbers of B lymphocytes expressing the CD5 (Leu-1) surface antigen have been observed in patients with certain autoimmune diseases. In the present study, approximately 30% of schizophrenic patients (11/34) were found by cytofluorometric methods to have similarly increased levels of circulating CD5+ B cells compared with 6% (2/33) of healthy individuals and 5% (1/20) of patients with bipolar affective disorder. In schizophrenic patients with a "high" CD5+ B-cell phenotype, the percentage of B cells expressing the CD5 surface marker (mean +/- SEM, 52.4% +/- 3.5%) was comparable to that reported for patients with rheumatoid arthritis and significantly greater than that reported for patients with bipolar affective disorder (25.7% +/- 2.5%) and healthy controls (31.0% +/- 1.8%). Schizophrenic patients with high levels of CD5+ B cells had increased numbers of total B cells compared with control subjects and patients with low levels of CD5+ B cells. An elevation in CD5+ B cells may delineate a subgroup of schizophrenic patients whose disease has an underlying autoimmune and/or genetic cause.
authors: Clinical Neuroscience Branch, National Institute of Mental Health, Bethesda, 20892.
authors: C G
authors: CG
authors: McAllister
authors: M H
authors: MH
authors: Rapaport
authors: D
authors: D
authors: Pickar
authors: T A
authors: TA
authors: Podruchny
authors: G
authors: G
authors: Christison
authors: L D
authors: LD
authors: Alphs
authors: S M
authors: SM
authors: Paul
mesh_terms: D000328:Adult; D000943:Antigens, Differentiation / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology*; D018956:CD5 Antigens; D005260:Female; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D012559:Schizophrenia / Q000097:blood / Q000209:etiology / Q000276:immunology*
chemical_list: D000943:Antigens, Differentiation; D018956:CD5 Antigens