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目的:探讨B细胞特异性衔接蛋白BANK(B cell adoptor protein with ankyrin repeats)在小鼠实验性自身免疫性脑脊髓炎(Experimental autoimmune encephalomyelitis,EAE)中的作用.方法:MOG35-55多肽免疫C57BL/6鼠和BANK缺陷(BANK-deficient,BANK-/-)鼠制备EAE模型,观察实验动物临床症状及中枢神经系统的病理学变化;提取小鼠脑组织及脾脏,经流式细胞术检测中枢神经系统及外周免疫器官中的CD4+T细胞、CD8+T细胞及调节性T细胞的变化.结果:BANK-/-鼠EAE临床症状评分明显高于C57BL/6鼠,且体重减轻明显(P<0.05);HE染色结果显示,BANK-/-鼠较C57BL/6鼠炎症感染灶明显增多.流式细胞术结果显示,相对于C57 BL/6鼠BANK-/-鼠中枢神经系统中CD8+T细胞百分比明显增多,而脾脏中调节性T细胞百分比明显减少,CD4/CD8比值倒置(P<0.05).结论:B细胞衔接蛋白BANK的表达抑制EAE炎症反应.“,”Objective:To investigate the role of B cell adoptor protein with ankyrin repeats ( BANK ) in experimental autoimmune encephalomyelitis ( EAE) .Methods: C57BL/6 mice and BANK-deficient ( BANK-/-) mice were immunized with MOG peptide in CFA,and then observed the clinical symptoms and pathological severity .Results: The percentages of CD4+T cells,CD8+T cells and regulatory T cells in brain and spleen were analyzed by flow cytometry .BANK-/-mice showed significantly higher score at the peak and the plateau phase compared with wild-type mice(P<0.05).HE staining showed more widespread areas of inflammation and demyelination in BANK-/-mice when compared to wild-type mice on day 16.In addition,the frequency of CNS-infiltrating CD8+T cells was markedly higher in BANK-/-mice than in wild-type mice.In addition,the percentage of CD8+T cells from spleen in BANK-/-mice was also increased compared with wild-type mice (P<0.05).By contrast,the percentage of regulatory T cells and the ratio of CD 4/CD8 T cells from spleen in BANK-/-mice were significantly lower than in wild-type mice(P<0.05).Conclusion:Thus,BANK expression in B cells can inhibit the development of EAE .