老年肿瘤患者外周血CD4+CD25+调节性T细胞的检测及临床意义

目的 探讨老年肿瘤患者CD4+CD25+凋节性T细胞的变化及其与免疫衰老的关系.方法 以64例健康青年人(青年组)、52例健康老年人(老年组)和64例老年肿瘤患者(老年肿瘤组)为研究对象,采用多色荧光素标记和多参数流式细胞术,分别检测外周血中CD4+CD25high、CD4+CD25+FoxP3+和CD4+CD25+CD127low T细胞,分析和比较各组之间的差异及各指标之间的相关性.结果 以外周血中CD4+ T细胞设门,青年组、老年组和老年肿瘤组CD4+CD25high T细胞分别为(1.390±0.4]2)%、(1.729士0.247)%和(2.150±0.769)%,CD4+CD25+FoxP3+细胞分别为(1.180±0.343)%、(2.477士0.400)%和(4.980±2.177)%,CD4+CD25+CD127low T细胞分别为(5.213±0.942)%、(6.186±1.196)%和(7.194±1.538)%.3项指标均为老年肿瘤组最高,青年组最低,差异有统计学意义(P＜0.05);3项指标均呈正相关(P＜O.05).结论 CD4+CD25+调节性T细胞过量累积可能与免疫衰老及老年肿瘤密切相关.

The frequency and clinical significance of CD4+CD25+ regulatory T cells in peripheral blood from elderly tumor patients

Objective To investigate the relationship between CD4+CD25+ regulatory T(T-Reg)ceils and the higher prevalence of tumor in elderly people. Methods The frequencies of T-Reg in peripheral blood from 64 health adults.52 healthy elderly people and 64 elderly cancer patients were determined by multi-color detection and multi-parameter flow cytometry.and the relationships among the 3 groups were analyzed and the correlation among CD4+CD25high,CD4+CD25+FoxP3+and CD4+CD25+CD127low were studied. Results Be gated on CD4+ lymphocytes,the reference ranges of CD4+CD25high T cells in the groups of health adults.healthy elderly people and elderly cancer patients were(1.390±0.412)%,(1.729±0.247)%and(2.150±O.769)%respectively,while CD4+CD25+FoxP3+ T cells were(1.1 80±0.343)%,(2.477±0.400)%and (4.980±2.177)%respectively,and CD4+CD25+CD127low T cells were(5.213±0.942)%,(6.186±1.196)%and(7.194±1.538)%respectively.There was the same change rule in CD4+CD25high,CD4+CD25+FoxP3+and CD4+CD25+CD127low T cells of the 3 groups.elderly cancer patients was at the highest.then was healthy elderly people,and the last was health adults.The 3 markers were positively correlated among 3 groups(all P＜0.05).There were gender difference in 3 groups of CD4+CD25high,CD4+CD25+FoxP3+ and CD4+CD25+CD127low T cells. Conclusions The percentages of CD4+CD25high are increased with age and its excessive accumulation is possibly correlated with immunosenescence and the tumor development.