人类免疫缺陷病毒感染者T淋巴细胞亚群增殖、活化与疾病进展的相关性

目的 探讨慢性未治疗HIV/AIDS患者T淋巴细胞增殖活化与疾病进展的相关性.方法 以16例健康人及49例慢性未治疗的HIV/AIDS患者为研究对象,HIV/AIDS患者根据CD4+T淋巴细胞计数分为CD4+T淋巴细胞<200×106/L组、(200～350)X106/L组、>350X106/L组.分离患者外周血单个核细胞(PBMC),Ki-67标记细胞增殖,CD38标记细胞活化,流式细胞仪检测各项指标.数据采用单因素方差分析.结果CD4+T淋巴细胞<200×106/L组Ki-67+CD4+T 淋巴细胞比例为7.92%±4.37%,高于健康对照组的0.39%±0.24%、(200～350)×106/L组的2.61%±2.12%和>350X 106/L组的2.65%±2.13%,差异均有统计学意义(F=21.961,P<0.01);CD4+T淋巴细胞<200X106/L组Ki-67+CD8+T淋巴细胞比例为2.87%±1.13%,高于健康对照组的0.15%±0.90%、(200～350)×106/L组的1.40%±1.17%和>350×106/L组的1.22%±0.80%,差异均有统计学意义(F=19.203,P<0.01).且Ki-67+CD4+和Ki-67+CD8+T淋巴细胞比例与CD4+T淋巴细胞计数呈负相关(r=-0.654,r=-0.539;均P<0.01),而与病毒载量无关.CD4+T淋巴细胞<200×106/L组CD38+CD4+、CD38+CD8+T淋巴细胞比例分别为44.14%±20.65%和50.64%±21.08%,健康对照组为10.22%±3.98%和6.46%±3.99%,(200～350)×106/L组为16.03%±10.20%和19.33%±13.43%,>350×106/L组为13.69%±10.70%和16.98%±15.75%(F=14.333,F=15.412;均P<0.01),且CD4+和CD8+T淋巴细胞Ki-67的表达程度与CD38呈正相关(r=0.527,r=0.391;均P=0.002).结论 随着慢性HIV/AIDs疾病的进展,T淋巴细胞的增殖与活化均显著增高,T淋巴细胞活化可能是免疫持续激活的结果.

Relationship of proliferation and activation of T lymphocyte subsets and disease progression in human immunodeficiency virus-I-infected individuals

Objective To study the relationship of proliferation and activation of T lymphocyte subsets and disease progression in antiretroviral-naive human immunodeficiency virus(HIV)-1-infected individuals.Methods Forty-nine antiretroviral-naive,chronically HIV-1 infected patients and 16 healthy,HIV-1 negative controls were enrolled in this study.The patients were divided into 3 groups according to their CD4+T cell counts:<200×106/L,(200-350)×106/L and>350×106/L.Peripheral blood mononuclear cells(PBMC)were isolated.T cell proliferation index was measured by Ki-67 staining.T cell activation was detected by CD38 staining.The samples were analyzed by flow cytometry.The data were compared by one-way ANOVA.Results The percentage of Ki-67+cells in CIM+T ceils was 7.92%±4.37%in CD4+T cell<200×106/L group,which was significantly higher than those 0.39%d:0.24%in control group,2.61%±2.12%in(200-350)×106/k group and 2.65%±2.13%in>350 X106/L group(F=21.961,P<0.01).The percentage of Ki-67+cells in CD8+T ceils in CD4+T cells<200×106/L group was 2.87%±1.13%,which was also much higher than those in other 3 groups(0.15%±0.90%,1.40%±1.17%,1.22%±0.80%,respectively F=19.203,P<0.01).The Ki-67'CD4'T cells and Ki-67+CD8+T cells were inversely correlated with CD4+T cell counts(r=-0.654,r=-0.539,respectively;P350×106/L group(F=14.333,F=15.412,respectively;P<0.01).The expressions of Ki-67+ on CD4+ and CD8+T cells were positively correlated with CD38 expression(r=0.527,r=0.391,respectively;P=0.002).Conclusions The proliferation and activation of T lymphoeytes are enhanced during HIV/AIDS disease progression.And T eell activation may be the result of persistent immune activation.