中国HIV感染者细胞毒性淋巴细胞与CD4~+CD25~+调节性T细胞相关性研究

目的：对中国HIV感染者NK细胞、CD8^＋T细胞及胞内穿孔素、颗粒酶-B表达与CD4^＋CD25^＋Foxp3^＋调节性T细胞水平的相关性进行研究,探讨调节性T细胞在HIV感染中的作用机制。方法：选取73名HIV/AIDS患者（长期不进展组、无症状HIV组、AIDS组）,应用流式细胞仪胞内染色技术检测NK细胞、CD8^＋T细胞数量及胞内穿孔素、颗粒酶-B表达水平,分析其与CD4^＋CD25^＋Foxp3^＋调节性T细胞水平的相关性。结果：CD4^＋CD25^＋Foxp3^＋调节性T细胞百分率与NK细胞、CD8^＋T淋巴细胞数量呈明显负相关（P〈0.01）,与CD8^＋T细胞内穿孔素、颗粒酶-B表达百分率呈明显正相关（P〈0.05）,与NK细胞内穿孔素、颗粒酶-B表达水平绝对值负相关（P〈0.01）,与CD8＋T细胞内颗粒酶-B表达绝对值呈明显负相关（P〈0.01）,与CD8^＋T细胞内穿孔素表达绝对值无明显相关性（P〉0.05）。CD4^＋CD25^＋Foxp3^＋调节性T细胞绝对值与CD8^＋T细胞内穿孔素、颗粒酶-B表达百分率呈明显负相关（P〈0.05）。结论：中国HIV感染者细胞毒性淋巴细胞数量功能的变化与调节性T细胞显著相关,提示高水平的调节性T细胞可能与细胞毒性淋巴细胞耗竭相关,可能为导致疾病进展的原因之一。

Correlation between CD4~+CD25~+Foxp3~+ regulatory T cells and cytotoxic lymphocytes in HIV infected patients

Objective:To detect the relationship between the frequencies of CD4+CD25+Foxp3+ regulatory T cells and cytotoxic lymphocytes in HIV infected patients in China,in order to study the mechanism of regulatory T cells in HIV infection.Methods:73 untreated HIV-1 infected patients and 16 normal controls were enrolled and the frequencies of CD4+CD25+Foxp3+ regulatory T cells,NK cells,CD8+T cells and granzyme-B,perforin expression of cytotoxic lymphocytes were detected by flow-cytometry.Results:The frequency of CD4+...