维持性血透患者外周血中性粒细胞的IL-1ra基因表达和吞噬杀菌功能

目的：对维持性血液透析（ＨＤ）患者外周血中性粒细胞（ＰＭＮ）白介素－１受体拮抗物（ＩＬ－１ｒａ）基因表达和吞噬及杀菌功能进行研究，并探讨二者的相关性。方法：用ＲＴ－ＰＣＲ方法检测ＨＤ患者外周血ＰＭＮ ｉｃＩＬ－１ｒａ（胞内型）和ｓＩＬ－１ｒａ（分泌型）基因表达；通过菌落计数方法观察ＰＭＮ对金黄色葡萄球菌（金葡菌）吞噬和杀菌功能的改变。结果：ＨＤ患者ＰＭＮ中可检测到５１２ｂｐ（ｉｃＩＬ－１ｒａ）和１４６ｂｐ（ｓＩＬ－１ｒａ）的ＲＴ－ＰＣＲ产物；ＨＤ患者ＰＭＮ对金葡菌的吞噬和胞内杀菌能力均较正常对照明显下降（Ｐ〈０．０１或Ｐ〈０．０５）。结论：ＨＤ患者ＰＭＮ可自发表达ｉｃＩＬ－１ｒａ和ｓＩＬ－１ｒａ，这种预激活状态与其对金葡菌的吞噬和杀灭作用下降相平行。

Expression of IL-1ra mRNA and dysfunction of phagocytosis and intraceilular killing of peripheral blood neutrophils in HD patients

Objective: To investigate the function and IL 1ra gene expression of neutrophils in hemodialysis (HD) patients. Methods: Gene expression was studied by reverse transcribe polymerase chain reaction (RT PCR) from untreated neutrophils in healthy controls and HD patients. Phagocytosis and bactericidal assays decreased in the number of viable extracellular and intracellular bacteria by colony counts. Results: Freshly isolated neutrophils spontaneously expressed icIL 1ra, sIL 1ra mRNA in HD patients. Phagocytosis and intracellular killing of neutrophils in HD patients impaired obviously when exposed to staphylococcus aureus in comparison with healthy controls. Conclusion: Untreated neutrophils in HD patients spontaneously express icIL 1ra and sIL 1ra mRNA, which is consistent with the suppressed phagocytosis and intracellular killing capacity. [