脓毒症患者外周血CD4+CD25+调节性T细胞水平与APACHEⅡ评分相关性的临床研究

目的 探讨脓毒症患者外周血CD4+CD25+调节性T细胞水平及其与疾病严重程度的相关性.方法 选取脓毒症患者36例,依据诊断标准分为脓毒症组10例、严重脓毒症组15例和脓毒性休克组11例,以健康志愿者5例作为对照组.于入ICU时抽取外周血,分离淋巴细胞,以藻红蛋白(PE)标记的抗人CD4和异硫氰酸荧光素(FTTC)标记的抗人CD25单克隆抗体标记细胞,流式细胞仪检测CD4+CD25+调节性T细胞含量.并结合各组不同时间点的急性生理学及慢性健康状况(APACHE)Ⅱ评分,分析CD4+CD25+调节性T细胞与APACHEⅡ评分的相关性.结果 脓毒症组、严重脓毒症组和脓毒性休克组外周血CD4+CD25+调节性T细胞含量分别为(10.31±2.32)%、(14.27±3.33)%、(15.32±3.98)%]均较对照组(5.48±0.98)%]显著增高(P＜0.05或＜0.01).各组CD4+CD25+调节性T细胞水平与APACHEⅡ评分呈明显正相关,相关系数分别为0.829(P=0.032)、0.868(P=0.021)、0.913(P=0.009),总相关系数为0.903(P=0.013).结论 脓毒症患者外周血CD4+CD25+调节性T细胞明显升高,且与疾病严重程度相关.

Clinical study on correlation between the level of CD4+CD25+regulatory T cells in peripheral blood and APACHE Ⅱ scores in patients with sepsis

Objective To evaluate the correlation between the level of CD4+CD25+regulatory T cells in periphend blood and disease severity in patients with sepsis.Methods Thirty-six septic patients and 5healthy controls were enrolled.Septic patients were divided into sepsis group(n=10),severe sepsis group (n=15)and septic shock group(n=11).The lymphocyte was seperated from peripheral blood and marked by PE-CD4 and FTTC-CD25 monoclonal antibody,the level of CD4+CD25+ regulatory T cells was detected by flow cytometry,and the clinical data of APACHE Ⅱ scores of septic patients was considered in 24 hours.The correlation between level of CD4+CD25+ regulatory T cells in peripheral blood and APACHE Ⅱ scores in septic patients was analyzed.Results Compared with the healthy controls (5.48±0.98)%],the level of CD4+ CD25+ regulatory T cells in sepsis group(10.31±2.32)%,severe sepsis group(14.27 43.33)%,septic shock group(15.32±3.98)% had a significant increase(P＜0.05 or＜0.01).The log value of regulatory T cells in each group correlated positively with the APACHE Ⅱ scores(r=0.829,P=0.032;r=0.868,P=0.021;r=0.913,P=0.009),and the total coefficient of correlation was 0.903(P=0.013).Conclusion The level of CD4+CD25+ regulatory T cells in peripheral blood in septic patients has an abnormal increase,and their levels are related with the severity of disease.