CD5 positivity on peripheral blood B lymphocytes in patients with primary Sjögren's syndrome

Abstract

The increased number of the CD5+ (Leu 1) B cells in 9 of 17 patients with primary Sjögren's syndrome (SS) were found in this study. The percentage of CD5+ B cells that demonstrated an increased number of these cells was more than 45% in patients with pSS, and the normal level 26.3 +/- 8.8% in control subjects. The ratio of the CD5+ B cells was higher if the pSS was in the active stage.