TY - JOUR T1 - INcreased numbers of cd5 b lymphocytes in schizophrenic patients AU - McAllister CG, Rapaport M, Pickar D, et al Y1 - 1989/10/01 N1 - 10.1001/archpsyc.1989.01810100032006 JO - Archives of General Psychiatry SP - 890 EP - 894 VL - 46 IS - 10 N2 - • 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. SN - 0003-990X M3 - doi: 10.1001/archpsyc.1989.01810100032006 UR - http://dx.doi.org/10.1001/archpsyc.1989.01810100032006 ER -