不同结核杆菌抗原刺激外周血T细胞亚群产生干扰素的比较
Comparison of IFN- production in human peripheral blood T cell subpopulations stimulated by different antigens from Mycobacterium tuberculosis
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摘要: 目的:比较磷酸化抗原(HDMAPP)、结核杆菌耐热抗原(Mtb-HAg)和结核杆菌低分子耐热抗原Mtb-HAg(10k)刺激外周血T细胞产生-干扰素(IFN-) 的反应能力方面的特点及差异。方法:采集正常人外周血,分别用HDMAPP、Mtb-HAg和Mtb-HAg(10k)刺激培养14h,再加入莫能霉素继续培养6 h,收集细胞,加入荧光标记单抗进行表面分子和胞内染色,然后在流式细胞仪上检测各实验组中CD3+细胞和CD3+细胞胞内IFN-的表达。结果:正常人各抗原实验组CD3+细胞和CD3+ 细胞胞内产生IFN-+细胞比率较阴性组对照组升高(P0.01)。各抗原刺激组CD3+ 细胞产生IFN-+细胞比率明显高于CD3+细胞(P0.05~P0.01)。3种抗原刺激组间CD3+细胞和CD3+细胞无明显不同(P0.05)。结论:HDMAPP、Mtb-HAg和Mtb-HAg(10k)均可以刺激外周血中T细胞中和 细胞群产生IFN-,均可特异性诱导刺激CD3+细胞产生IFN-,HDMAPP、Mtb-HAg(10k)对CD3+细胞产生IFN-的表达量高于Mtb-HAg。Abstract: Objective:To compare the characteristics and differences of peripheral blood T cells stimulated by HDMAPP,Mycobacterium tuberculosis heat-resistant antigen(Mtb-HAg) and low molecular peptide antigen of Mycobacterium tuberculosis(Mtb)(10 k) to produce interferon(IFN-).Methods:The peripheral blood cells from healthy adults were cultured with HDMAPP and Mtb-HAg and Mtb-HAg(10k) for 14 hours,then added Monensin to cultivate for another 6 hours.Cells were collected,and the surface molecule and intracellular cytokines were stained with different fluorochrome-conjugated mAbs.The expressions of IFN- in CD3+ and CD3+ cells of different experiment group were detected by flow cytometry.Results:The ratios of CD3+ and CD3+ cells to produce IFN- in all antigen experiment groups were higher than that in control group(P0.01).The ratios of CD3+ cells to produce IFN- in all antigen experiment groups were significantly higher than that of CD3+ cells(P0.05 to P0.01).The differences of CD3+ cells and CD3+ cells in three kinds of antigenic stimulation groups were not statistical significance(P0.05).Conclusions:CD3+ cells and CD3+ cells can produce IFN- by stimulating the peripheral blood T cells with HDMAPP,Mtb-HAg and Mtb-HAg(10k).CD3+ cells stimulated by three kinds of antigens can produce IFN-.The IFN- level in CD3+ cells stimulated by HDMAPP and Mtb-HAg(10 k) is higher than that of Mtb-HAg stimulating.
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Key words:
- Mycobacterium tuberculosis /
- antigen /
- interferon /
- T cell /
- T cell
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