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FcγRⅡB在重症肌无力中的表达及其与抗AChR抗体的关系 被引量:1

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摘要 目的探讨免疫球蛋白IgG的Fc段受体ⅡB(FcγRⅡB)在重症肌无力(myasthenia gravis,MG)发病中的作用。方法采用逆转录-聚合酶链技术和流式细胞术,检测26名血清乙酰胆碱受体(AChR)抗体阳性MG患者和26名正常对照组外周血B淋巴细胞中FcγRⅡBmRNA和FcγRⅡB蛋白的表达水平,ELISA检测血清AChR抗体水平,分析三者之间的关系。结果 MG组外周血B细胞中FcγRⅡBmRNA的表达明显低于正常对照组(P<0.01),但在眼肌型患者和全身型患者的表达无统计学差异(P>0.05)。MG患者外周血B细胞上FcγRⅡB的表达低于对照组(P<0.05)。IgG型AChR抗体水平与B细胞中FcγRⅡB1mRNA和FcγRⅡB2mRNA表达水平呈负相关(P<0.01),与FcγRⅡB的表达亦为负相关(P<0.05)。结论 MG中B细胞上FcγRⅡB在转录和蛋白水平表达均降低,负调控作用减弱,造成B细胞过度活化,产生大量抗AChR自身抗体,可能是MG发病的一个重要环节。
出处 《中国神经精神疾病杂志》 CAS CSCD 北大核心 2010年第8期492-494,共3页 Chinese Journal of Nervous and Mental Diseases
基金 国家自然科学基金资助项目(编号:30870857) 湖南省自然科学基金(编号09JJ3079)
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参考文献12

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