肺结核患者外周血单个核细胞MCP-1表达上升

Elevated MCP-1 stimulated with Mtb-specific peptides in patients with pulmonary tuberculosis

目的 研究肺结核患者血浆单核细胞趋化蛋白（MCP-1）的浓度特点及外周血单核细胞（PBMCs）经结核分枝杆菌特异性抗原肽刺激后MCP-1和IFN-γ的表达及相关性.方法 20例活动期肺结核患者和16位PPD阳性健康对照,采集EDTA抗凝血,用结核分枝杆菌特异性抗原肽刺激PBMCs,采用FlowCytomix流式技术检测血浆和细胞培养液上清上中MCP-1和IFN-γ的表达.结果 肺结核患者血浆MCP-1浓度与对照组比较差异无统计学意义[肺结核组（263.8±25.31）pg/ml,对照组（212.1±18.04）pg/ml,P＞0.05],但肺结核患者的血浆MCP-1水平偏高,尤其是呼吸道症状明显的患者.肺结核患者的PBMCs经结核分枝杆菌特异性抗原肽刺激后,培养液上清中MCP-1的水平比血浆显著升高,肺结核患者与对照组比较差异有统计学意义[（21460±3376）pg/ml vs 10910±2141）pg/ml,P＜0.01],与IFN-γ的分泌无关（spearman r=0.1835,P＞0.05）.结论 肺结核患者血浆MCP-1浓度可能与病情发展相关;结核分枝杆菌特异性抗原肽刺激外周血单个核细胞产生的MCP-1可能成为新的诊断指标之一.

Objective To study the feature of MCP-1 in plasma of active pulmonary tuberculosis patients and the correlation of MCP-1 obtained from PBMCs stimulated with specific Mtb peptides with IFNγ.Methods 20 patients with active pulmonary tuberculosis and 16 healthy controls with positive PPD were enrolled.The concentration of MCP-1 and IFN-γwas analyzed with Bender Flowcytomix on flow cytometry.Results No statistical difference of MCP-1 concentration in plasma was found between TB patients and controls [（263.8 ± 25.31）pg/ml and（212.1 ± 18.04）pg/ml,P 〉 0.05].But TB patients with continuous respiratory symptoms showed higher MCP-1 in plasma.The concentration of MCP-1 and IFN-γwas significantly elevated in PBMCs culture supernatants.It was significantly higher in TB patients than in controls [（21460 ±3376）pg/ml vs（10910 ±2141）pg/ml,P 〈0.01].There was no correlation between the concentration of MCP-1 and IFN-γ.Conclusions The concentration of MCP-1 in plasma may be related to the progress of the pulmonary tuberculosis.MCP-1 stimulated by Mtb-specific peptides may be one of the biomarkers for TB diagnosis.