脓毒症急性肺损伤患者外周血Th22和Th17细胞水平变化及临床意义

Changes and significance of peripheral blood Th22 and Th17 cells in sepsis patients with acute lung injury

目的探讨外周血Th22和Th17细胞在脓毒症急性肺损伤患者中的水平变化及其临床意义。方法选取2013年1月-2017年1月于医院就诊的脓毒症患者320例为研究对象,根据是否存在急性肺损伤,将其分为脓毒症普通组252例和脓毒症急性肺损伤组68例。检测两组患者外周血Th22和Th17细胞水平与外周血白细胞介素22(IL-22)、IL-6和IL-17的浓度。采用受试者工作特征曲线(ROC)评估外周血Th22和Th17细胞对脓毒症急性肺损伤早期诊断的效能。结果脓毒症急性肺损伤组肺损伤预测(LIPS)评分、IL-6、IL-17、IL-22、Th17及Th22细胞分别为(8.73±0.18)分、13.02(11.55,14.87)ng/L、22.06(18.42,25.89)ng/L、22.10(19.75,25.04)ng/L、(8.30±1.28)%及(6.40±0.93)%高于脓毒症普通组(P<0.05)。LIPS评分、IL-17、IL-22、Th17细胞及Th22细胞是脓毒症患者发生脓毒症急性肺损伤的影响因素(P<0.05)。相关性分析显示,脓毒症急性肺损伤患者外周血Th22细胞比例与LIPS评分、IL-22及Th17细胞比例呈正相关(P<0.05);同时外周血Th17细胞比例与LIPS评分及IL-17呈正相关(P=0.006)。外周血Th22细胞曲线下面积为0.837(0.768～0.901),其截断值为6.21%时,其早期诊断脓毒症急性肺损伤的敏感性和特异性分别73.72%和88.13%,优于外周血Th17细胞,但差异无统计学意义(P=0.397)。结论外周血Th22和Th17细胞在脓毒症急性肺损伤患者中明显升高,对于脓毒症急性肺损伤的早期诊断,具有重要的临床价值。

OBJCETIVE To investigate the change and clinical significance of peripheral blood Th22 and Th17 cells in sepsis patients with acute lung injury.METHODS A total of 320 patients with sepsis treated in our hospital from Jan.2013 to Jan.2017 were enrolled in the study,and divided into normal sepsis group(252 cases)and sepsis with acute lung injury group(68 cases)according to whether complicated with acute lung injury.The levels of Th22 and Th17 cells in peripheral blood were detected by flow cytometry.The levels of interleukin 22(IL-22)and interleukin 17(IL-17)in peripheral blood were detected by enzyme-linked immunosorbent assay.The efficacy of Th22 and Th17 cells in peripheral blood in the early diagnosis of sepsis with acute lung injury was evaluated by the receiver operating characteristic curve(ROC).RESULTS The Lung Injury Prediction Score(LIPS),interleukin(IL-6),IL-17,IL-22,Th17 and Th22 cells in peripheral blood of the patients in the sepsis with acute lung injury group were(8.73±0.18)points,13.02(11.55,14.87)ng/L,22.06(18.42,25.89)ng/L,22.10(19.75,25.04)ng/L,(8.30±1.28)% and(6.40±0.93),which were significantly higher than those in normal sepsis controls(P<0.05).The LIPS score,IL-17,IL-22,Th17 and Th22 cells ratio were independent risk factors for sepsis with acute lung injury(P<0.05).The correlation analysis showed that there were significant positive correlations among the ratio of Th22 cells in peripheral blood and LIPS score,IL-22 and Th17 cells in sepsis patients with acute lung injury.Meanwhile,the ratio of Th17 cells was positively correlated with LIPS score(P=0.006).The area under the curve was 0.837(0.768~0.901),and when the cut-off value of peripheral blood Th22 cells was 6.21%,the sensitivity and specificity of early diagnosis of sepsis with acute lung injury were 73.72%and 88.13%,respectively,which were better than those of Th17 cells.However,the difference was not significant(P=0.397).CONCLUSIONThe Th22 and Th17 cells levels in peripheral blood are significantly increased in sepsis patients with acute lung injury patients,which has important clinical value for early diagnosis of sepsis with acute lung injury.