B細胞成熟発達段階でのCD95誘導性細胞死システムの機能的役割を明らかにするために、B細胞の細胞表面形質, B細胞レパートワ解析などを検討した。正常ヒトの感染症発症後4. 7日後や自己免疫性疾患ではCD38陽性, IgD陰性, CD95陽性のメモリーB細胞, plasmablastと形質細胞を含むCD19陽性CD20陰性細胞の増加が認められた。自己免疫性疾患におけるB細胞発達段階でのCD95誘導性細胞死異常の存在が示唆された。
To examine the functional roles of CD95-induced apoptosis in B cell differentiation and maturation stages, B cell antigen expression and repertoire were analyzed. Increase of CD19-positive, CD20-negative cells including CD38 positive, IgD negative, CD95positive memory B cells, plasmablast and plasma cells were found in circulation in patients with infection and autoimmune disease. These results indicated that anomaly of CD95-induced apoptosis systems in B cell maturation may relate to the pathogenesis of autoimmune disease.