CD8+T细胞亚群对免疫抑制重症患者肺部侵袭性真菌感染的早期预测价值  被引量:4

Value of CD8 + T lymphocyte subgroups for the predication of pulmonary invasive fungal infections in immunocompromised critically ill patients

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作  者:崔娜[1] 刘大为[1] 王郝[1] 隆云[1] 刘晔[1] 丁欣[1] 周翔[1] 芮曦[1] 

机构地区:[1]中国医学科学院北京协和医学院北京协和医院重症医学科,100730

出  处:《中华医学杂志》2012年第18期1253-1258,共6页National Medical Journal of China

摘  要:目的探讨CD8+T细胞及其CD28、CD38、HLA—DR激活亚群对免疫抑制重症(ICCI)患者肺部侵袭性真菌感染(PIFI)的预测价值。方法前瞻、对照研究,入选ICCI合并肺部感染患者80例,入重症监护病房(ICU)后第1、3、7天(D1、D3、D7)用流式细胞术检测外周血CD8+T细胞亚群计数水平,根据欧N/美国国家真菌感染治疗研究组(EORTC-MSG)2008年共识进行PIFI诊断,同期以40例非感染非ICCI患者作为对照。结果71.3%(57/80)ICCI患者确诊和临床诊断PIFI,包括霉菌感染22例、念珠菌感染22例、霉菌和念珠菌混合感染13例。监测期间ICCI患者CD8+T细胞、CD28和CD38亚群的细胞计数均低于对照组,HLA—DR亚群细胞计数高于对照组(均P〈0.01);ICCI组中PIFI患者CD8+T细胞、CD28和CD38亚群的细胞计数低于非真菌感染患者(均P〈0.01),HLA.DR亚群细胞计数在两组间差异无统计学意义。受试者工作特征曲线分析显示,CD8+CD28+亚群细胞计数对PIFI的预测能力较高,曲线下面积分别为D1:0.83(95%CI:0.74~0.92),D3:0.84(95%CI:0.75—0.93),D7:0.87(95%CI:0.78~0.96);以最佳界值(D1〈64个/mm3,D3〈75个/mm3,D7〈88个/mm3)为标准,诊断PIFI的敏感度和特异度分别为D1:0.73(95%CI:0.61~0.85),0.90(95%CI:0.77~1.00);D3:0.74(95%CI:0.62—0.85),0.91(95%CI:0.78~1.00);D710.71(95%CI:0.58~0.84),0.95(95%CI:0.85~1.00),诊断符合率为D1:77.8%,D3:79.5%,I)7:78.5%。以ICU收住时间为起点,以CD8+CD28+细胞计数阳性为标准诊断PIFI所需时间明显短于以影像学改变或真菌学证据阳性为诊断标准所需时间(P〈0.01)。结论ICCI患者CD8+T细胞及其亚群的表型分布与PIFI密切相关,监测CD8+CD28+细胞计数对早期预测PIFI具有Objective To assess the predictive ability of CD8 + T-cell counts and the expressions of CD28, CD38, HLA-DR on CD8 + T cells in immunocompromised critically ill (ICCI) patients with pulmonary invasive fungal infections (PIFI). Methods The evolution of CD8 + T-lymphocyte subgroups ( CD8 + , CD8 + CD28 + , CD8 + CD38 + , CD8 + HLA-DR + ) were measured in the peripheral blood of 80 ICCI patients with pulmonary infection on day 1 ( D1 ), 3 ( D3 ) and 7 ( D7 ) of intensive care unit (ICU) admission by quantitative flow cytometry. Forty immunocompetent, uninfected critically ill patients were analyzed as control subjects at the time of admission. Immunocompromised risk factors and PIFI was diagnosed according to European Organization for Research and Treatment of Cancer-Mycoses Study Group (EORTC-MSG) 2008 definitions. Results PIFI were diagnosed in 71.3% of the ICCI patients (57/80) and included 22 molds infections, 22 Candida infections and 13 mixed infections. Among the 80 ICCI patients, CD8 + , CD8 + CD28 + , and CD8 + CD38 + T-cell counts were significantly lower ( P 〈 0. 01 ) and CD8 + HLA-DR + T-cell counts were significantly higher (P 〈 0. 01 ) than in the control subjects during the monitoring period, while CD8 +, CD8 + CD28 +, and CD8 + CD38 + T cells demonstrated an additional significant decrease in PIFI patients compared with non-PIFI patients ( P 〈 0. 01 ). Receiver operating characteristic (ROC) analysis for discrimination of the 28-day mortality revealed area under the curve (AUC) values of 0. 83,0. 84 and 0. 87 for the CD8 + CD28 + T-cell counts ( D1, D3 and ])7, respectively). Cutoff values of D1 〈 64 cells/mm3 , D3 〈 75 cells/mm3 , and D7 〈 88 cells/mm3 had sensitivities of 0. 73 (95% CI: 0. 61 -0. 85), 0. 74 (95% CI: 0. 62-0. 85), and 0. 71(95% CI: 0. 58-0. 84), specificities of 0. 90 (95% CI: O. 77 - 1.00), 0. 91 (95% CI: O. 78 - 1.00), and 0. 95 �

关 键 词:真菌病 CD8阳性T淋巴细胞 免疫抑制危重 

分 类 号:R519[医药卫生—内科学]

 

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