记忆性T细胞在重症肌无力发病机制中的作用  被引量:4

Number of memory T cells in myasthenia gravis

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作  者:黄鑫[1,2,3,4] 李言[1,2,3,4] 刘卫彬[1,2,3,4] 冯慧宇[1,2,3,4] 邱力[1,2,3,4] 王海燕[1,2,3,4] 

机构地区:[1]中山大学附属第一医院神经内科,广州510080 [2]广东省重大神经疾病诊治研究重点实验室,广州510080 [3]卫生部国家临床重点专科 [4]教育部国家重点专科

出  处:《中华医学杂志》2014年第45期3552-3556,共5页National Medical Journal of China

基  金:国家自然科学基金(30870850,81071002,81371386);广东省科技专项基金补助项目(2007B016002039);中山大学临床研究5010计划(2010003)

摘  要:目的探讨记忆性T细胞在重症肌无力(MG)患者体内数量的改变,证实MG患者体内存在免疫记忆紊乱。方法选取2009-2012年在中山大学附属第一医院神经科确诊为MG,且均在胸外科接受胸腺扩大切除术的27例患者,男12例,女15例,平均年龄(25±11)岁;手术有效组10例,手术无效组6例,手术症状改善有限组11例。健康对照组:年龄匹配无免疫系统相关疾病的健康人17名。利用流式细胞技术,检测MG患者与17名健康对照外周血单个核细胞(PBMCs)中的CD4^+CD45RO^+CClt7^+、CD8^+CD45RO^+CCR7^+、CD4^+CD45RO^+CD44^high、CD8^+CD45RO^+CD44^highT细胞各自的表达情况。结果MG患者CD4^+T细胞、CD8^+T细胞异常率均明显高于健康对照组(P〈0.05);MG患者外周血中CD4^+CD45RO^+CCR7^+T细胞在CD4^+T细胞中的表达百分比为(9.9±5.5)%,高于正常人CD4^+CD45RO^+CCR7^+T细胞的表达百分比(6.6±3.0)%(P=0.012);MG患者外周血中CD4^+CIM5RO^+CD44^highT细胞在CIM^+T细胞中的表达百分比为(6.84±2.4)%,高于正常人CD4^+CD45RO^+CD44^highT细胞表达百分比(5.04±3.0)%(P=0.04);MG患者CD8^+CD45RO^+CCR7^+T细胞在CD8^+T细胞中的表达百分比为1.08%(0.84%,1.89%),健康对照组CD8^+CD45RO^+CCR7^+T细胞表达百分比为0.5%(0.27%,0.9%),MG患者显著高于健康对照组(P〈0.001)。结论MG患者存在细胞免疫紊乱,效应记忆性T细胞、活化记忆性T细胞的数目增多可能是MG发病过程中的一个外周免疫机制。Objective To determine the altered number of memory T cells in myasthenia gravis (MG) patients and confirmed the existence of immune memory disorder. Methods A total of 27 MG cases (12 females, 15 males) undergoing expanded thymeetomy at our hospital between 2009 -2012. They were divided into 3 group of eutherapeutic ( clinical relative score I〉 50% ), invalid ( clinical relative score ≤ 25% ) and improved (25% 〈 clinical relative score 〈50% ). Control group was composed of 17 cases of healthy subjects without immune system related disease. Flow cytometry was employed to detect the numbers of CIM^+ , CD8^+ , CD4^+ CD45RO^+ , CD8^+ CD45RO^+ , CD4^+ CD45RO^+ CCR7^+ , CD8^+ CD45RO+ CCR7 ^+ , CIM + CD45RO ^+ CD44hish and CD8 ^+ CD45RO ^+ CD44^high T cells in PBMCs of 27 MG patients and 17 normal controls. Results As compared with healthy controls, the abnormal rates of CD4 ^+ mad CD8 ^+ T cells were significantly higher in patients (P 〈 0.05), the number of CD4 ^+ CD45RO ^+ CCR7 +T cells was significantly higher [(9.9 ±5.5)% vs (6.6 ±3.0)%, P =0. 012], the number of CD4^+ CD45RO^+ CD44h^+high T cells was significantly higher [ (6.8 ± 2.4) % vs (5.0 ± 3.0) %, P = 0.04 ] and the number of CD8 ^+ CD45RO ^+ CCR7 ^+ T cells was also significantly higher (P 〈 0. 001 ). Conclusion MG patients had immune disorders. And increased number of memory T cells and their activation may be pathogenesis of MG.

关 键 词:重症肌无力 细胞免疫 免疫记忆 免疫紊乱 

分 类 号:R746.1[医药卫生—神经病学与精神病学]

 

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