髓系细胞触发受体1在烧伤后早期患者外周血单核细胞中的表达

目的了解髓系细胞触发受体1（TREM-1）在烧伤后早期患者外周血单核细胞中的表达情况，并探讨其意义。方法选择8例健康志愿献血者（健康对照组）及伤后48h内入院的29例轻、中度烧伤患者（烧伤1组），9例重度、特重度烧伤患者（烧伤2组），采集其外周血分离单核细胞。半定量反转录-PCR法检测单核细胞TREM-1mRNA的表达，流式细胞术检测细胞表面TREM-1蛋白的表达。酶联免疫吸附测定法检测血浆中肿瘤坏死因子α（TNF-α）、白细胞介素1β（IL-1β）的含量。结果健康对照组、烧伤1组、烧伤2组外周血单核细胞中TREM-1mRNA表达量分别为0．74±0．13、1．24±0．09、1．46±0．07，细胞表面TREM-1蛋白表达率分别为（9±4）％、（51±6）％、（71±7）％。烧伤1组、烧伤2组以上2项指标及血浆中TNF-α、IL-1β含量均较健康对照组明显升高（P=0．000）。3组受试人员血浆中TNF—d、IL-1p的含量与TREM一1mRNA表达水平呈显著正相关（rs=0．68、0．72，P=0．000）。结论严重烧伤后早期患者外周血单核细胞中TREM-1表达增高，这一变化与炎性因子分泌相关；TREM-1参与了烧伤后急性炎性反应的发生与发展。

Expression of myeloid cell triggering receptor-1 in monocytes at early post-burn stage

OBJECTIVE: To investigate the expression of triggering receptor expressed on myeloid cells (TREM-1) in monocytes of burn patients at early post-burn stage, and its significance. METHODS: The monocytes of 8 healthy volunteers (A group), 29 patients with mild and moderate burn (B group), and 9 patients with severe and very serious burns (C group) were isolated from the blood, and the THEM-1 mRNA and protein expression were determined by semi-quantitative RT-PCR and flow cytometry, respectively. The plasma levels of TNF-alpha, IL-1beta were determined by ELISA method. RESULTS: The value of TREM-1 mRNA expression in A, B and C groups were 0.74 +/- 0.13, 1.24 +/- 0.09, and 1.46 +/-0.07, respectively, and the expression rates on cell surface in the 3 groups were (9 +/- 4)%, (51 +/- 6)%, and (71 +/- 7)%, respectively, and there were significant differences among the three groups (P = 0.000). the plasma levels of TNF-alpha and IL-1beta in B and C groups were obviously higher than that in A group (P = 0.000), and they were positively correlated to TREM-1 expression (rs = 0.68, 0.72, P = 0.000). CONCLUSION: Increased expression of TREM-1 in monocytes of burn patients at early post-burn stage is correlated with the release of inflammatory factors, indicating that TREM-1 might contribute to the onset and development of acute inflammatory response after burns.