Abstract
B cell activating factor (BAFF), a member of the tumor necrosis factor family, is a key cytokine for B cell survival, a function that is essential for B cell maturation and memory. The expression levels of BAFF and its potential contribution to B cell maturation remain elusive in patients with tuberculous pleural effusion (TPE). The present study enrolled 40 healthy controls (HC) and 45 TPE patients, and investigated the levels of BAFF in the plasma and pleural effusion. Concomitantly, B cell subsets including naïve B cell (CD19+IgD+CD27‑), unswitched B cell (CD19+IgD+CD27+), switched B cell (CD19+IgD‑CD27+), total memory B cell (CD19+CD27+), plasma B cell (CD19+IgD‑CD38+CD27+) and transitional B cell (CD19+IgDdim CD38+) in peripheral blood mononuclear cells (PBMCs) and pleural fluid mononuclear cells (PFMCs) were assessed using multicolor flow cytometry. Finally, the associations between BAFF and each sub‑group of B cells in TPE patients were analyzed. Compared with HC cases, an increased BAFF level and elevated frequency of switched B cell were observed in the blood and pleural effusion from patients with TPE. The proportions of naïve B cell, plasma B cell and transitional B cell were lower in the PFMCs of TPE patients. Furth...Continue Reading
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