补体调节蛋白CD59在HIV感染者外周血T细胞上的表达研究

目的 观察补体调节蛋白CD59在HIV感染者外周血T细胞上的表达情况,并进一步探讨高效抗逆转录病毒治疗（Highly Active Antiretroviral Therapy,HARRT）前后CD59在外周血T细胞上的表达变化及其意义.方法 收集48例确诊HIV感染者外周血,根据是否HARRT分为未治疗组（23例）及治疗组（25例）,并收集14例健康志愿者外周血,全血细胞表面染色后使用BD FACSCanto 流式仪检测CD59在外周血T细胞上的表达情况,并进一步检测CD59在CD45RO＋记忆型CD4T细胞表面的表达情况;同时用定量PCR技术检测HIV感染者的血浆病毒载量及CD4细胞绝对计数,将结果进行统计学分析并比较各组间差异.结果 与健康对照者比较,CD59在HIV感染者CD4＋T细胞上的表达水平明显增高（P＜0.05）,其中以在CD45RO＋记忆型CD4T细胞上增高为主（P＜0.05）;治疗组CD4＋T细胞上CD59的表达较未治疗组明显下降（P＜0.05）,但与健康对照组比较其表达仍处于较高水平（P＜0.05）,进一步分析发现CD59的这种变化主要发生在CD45RO＋（记忆型）CD4＋T细胞上;CD59在CD4＋T细胞上的表达变化与病毒载量及外周血CD4＋T细胞绝对计数均有一定的相关性（R2=0.2181,P=0.0247;R2=0.1586,P=0.0486）.结论 HIV感染可引起补体调节蛋白CD59在CD4＋T细胞上表达增加,HARRT可使其表达水平有所下降.这种表达增加可能与病毒免疫逃逸及CD4＋T细胞的功能抑制有关,HARRT治疗可部分逆转这种免疫紊乱现象.

Study of the expression of complement regulatory protein D59 on T cells in HIV infected patients

Objective To observe how complement regulatory protein CD59 expression on T cells in HIV infected patients and discuss the meaning of how highly active antiretroviral therapy(HARRT) affect CD59 expression. Methods 48 HIV infected patients and 14 healthy donors were performed in this study.Patients were divided into Naive group and On-HARRT group according to HARRT or not. The peripheral blood samples were collected and cell surface cytokines were stained, and then were evaluated with the BD FACS Canto flow cytometry, after that, the expression of CD59 on CD4+T, CD8+T and memory CD45ROCD4+T cells were analyzed, and HIVRNA were detected with PCR, then compare the results between groups. Results Compared with healthy donor, the expression of CD59 on T cells in HIV infected patients are significantly higher(P＜0.05), most of that expressed on CD45ROCD4+T cells(P＜0.05).Compared with Naive group, the CD59 expression on CD4+T cells in On-HARRT group decreased significantly but it is still higher while compared with healthy control(P＜0.05). CD59 expression on CD4+T cells is correlated with HIVRNA and CD4+T cells count(R2=0.2181, P=0.0247; R2=0.1586, P=0.0486). Conclusion HIV infection can cause CD59 expression increase on CD4+T cells and HARRT can decrease its expression. This increase may be related to HIV immune escape and CD4 +T cell function inhibition, and HARRT can partially reverse this immune disorder.