肾移植术后并发巨细胞病毒肺炎患者的细胞免疫状态

目的 探讨CD4+T淋巴细胞ATP含量检测在肾移植术后并发巨细胞病毒(CMV)肺炎治疗中应用价值.方法 以187例首次肾移植受者作为研究对象,分别于术前,术后30、60、90和180d,发生CMV肺炎时,以及治疗4周后采集受者外周血,应用ImmuKnowTM免疫细胞功能测定试剂盒检测CD4+T淋巴细胞内ATP含量.采用方差分析对不同检测时间点及术后有无并发CMV肺炎者的外周血CD4+T淋巴细胞ATP含量进行比较,采用Pearson-Spearman秩和检测对ATP含量与感染的相关性进行分析.结果 187例受者中发生CMV肺炎17例,发生率为9.1 ％(17/187),发生时间为术后(2.8±1.2)个月.术后所有时间点CD4+T淋巴细胞ATP含量均明显低于术前(P＜0.01),ATP含量在术后90d时达最低点,与术后其他时间点比较,差异有统计学意义(P＜0.05).发生CMV肺炎者术前外周血CD4+T淋巴细胞ATP含量为(376±182) μmol/L,术后30和90 d分别为(283±146) μmol/L和(196±112) μmol/L,发生CMV肺炎时和治疗4周后分别为(145士102)μmol/L和(236±117) μmol/l,发生CMV肺炎时ATP含量与其他各个时间点比较,差异均有统计学意义(P＜0.05).相关分析表明,CD4+T淋巴细胞内ATP含量降低与CMV肺炎的发生具有显著相关性(相关系数=0.5106,P＜0.01).结论 肾移植后测定受者外周血CD4+T淋巴细胞ATP含量,可反映受者的细胞免疫状态及判断CMV肺炎的严重程度和临床预后,并可指导CMV肺炎的治疗.

The cell-mediated immune status of patients with cytomegalovirus pneumonia after renal transplantation

Objective To evaluate the clinical value of adenosine triphosphate (ATP) determination in CD4+ cells in cytomegalovirus pneumonia after renal transplantation.Methods The ATP level of CD4+ T cells was measured by ImmuKnowTM kit.The ATP levels were determined in 187 renal transplant recipients before and 30,60,90,180 days after operation,and at the time of CMV pneumonia and 4 weeks after treatment of CMV pneumonia.The associations between ATP levels and CMV pneumonia were analyzed.Analysis of variance (ANOVA),Pearson-Spearman and relative risks were used for data analysis.Results 17 cases out of 187 renal transplant recipients were diagnosed as CMV pneumonia (9.1％),and the onset of CMV pneumonia started on the (2.8 ±1.2)month after renal transplantation.ATP concentrations in CD4+ T cells were significantly lower after operation than those before operation (P＜0.01).ATP concentrations reached the lowest on the about postoperative day 90 (P＜0.05),then increased gradually.In 17 recipients with CMV pneumonia,the ATP levels before and 30,90 days after operation,at the time of CMV pneumonia and 4th week after treatment of CMV pneumonia were (376 ±182),(283 ± 146),(196 ± 112),(145 ± 102) and (236 ± 117) μg/L respectively.ATP levels at the time of CMV pneumonia were significantly lower than any other time points (P＜0.05).There was close correlation between ATP levels and CMV pneumonia.Conclusion The determination of ATP in CD4+ cells could reflect the status of cell-mediated immunity in renal transplant recipients,and could evaluate the severity and prognosis of CMV pneumonia and guide the clinical treatment.