哮喘患者肺部γδT淋巴细胞和受体δ链的多态性

γδT Lymphocytes Function and the Polymorphism of T Cell Receptor Vδ Chain in the Lung of Asthmatic Patients

目的观察哮喘患者肺部γδT淋巴细胞数量、分类、增殖率、所分泌的细胞因子和T细胞受体δ链的多态性,探讨肺部γδT细胞对哮喘患者气道炎症的影响。方法 7例哮喘患者和7例对照者的支气管肺泡灌洗液细胞分类计数,流式细胞术检测γδT细胞,免疫磁珠分选技术纯化γδT细胞,MTT法检测γδT细胞的增殖活性,ELISA法检测γδT细胞分泌细胞因子浓度,RT-PCR技术和基因扫描技术测定γδT细胞δ链的克隆性。结果哮喘患者组支气管肺泡灌洗液中γδT细胞的百分率为(6.39±0.71)%,高于对照组的(2.62±0.37)%(P<0.01);巨噬细胞为(81±4)%,低于对照组的(86±2)%(P<0.05);哮喘组γδT细胞的增殖率为(284.2±43.6)%,高于对照组的(217.5±59.5)%(P<0.05)。γδT细胞分泌的白细胞介素-4浓度为(18.9±3.1)pg/ml,高于对照组的(14.1±3.0)pg/ml(P<0.05)。γδT细胞受体δ1链、δ2链两组差异无显著性。结论γδT细胞在支气管哮喘患者的肺部明显增多,加剧了Th1/Th2失衡。γδT细胞对抗原的识别是非特异的。

Objective To observe the function of γδT lymphocytes and the polymorphism of T cell receptor Vδ chain in the lungs of asthmatic patients and explore the role of γδT cells in airway inflammation.Methods Bronchoalveolar lavage fluid(BALF)was obtained from 7 asthmatic patients and 7 healthy control individuals.The percentage of γδT cell in BALF was measured by flow cytometry.The γδT cell in BALF was purified by magnetic labeled beads.Proliferous activity was examined by MTT assay.Cytokines secretedby γδT cells...