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肺结核患者外周血中CD4+CD25+FoxP3+调节T细胞增多并抑制抗结核免疫

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Keywords: T淋巴细胞,CD+CD+FoxP+调节T细胞,肺结核,分枝杆菌,结核,免疫

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Abstract:

目的研究肺结核患者外周血中CD4+CD25+FoxP3+调节T细胞是否增多,这些调节T细胞是否抑制结核的特异细胞免疫反应。方法使用细胞分离、流式细胞分析及细胞增殖及增殖抑制等实验方法,对20例肺结核患者及17例健康人群外周血中CD4+CD25+FoxP3+调节T细胞的数量及免疫学特征作研究。结果肺结核患者外周血中CD4+CD25+FoxP3+调节T细胞数占CD4+细胞总数的比例显著高于健康人群(P<0.01)。在体外,肺结核患者外周血单个核细胞在BCG及ESAT-6的刺激下增殖能力比健康对照人群明显增强(P<0.01),产生的γ-干扰素比健康人群也明显增强(P<0.05);清除调节T细胞后的肺结核患者外周血单个核细胞对BCG刺激下产生γ-干扰素及白介素-10比没有清除时显著增强(P<0.05);从肺结核患者外周血分离CD4+CD25+调节T细胞和CD4+CD25-细胞,CD4+CD25-细胞对BCG及ESAT-6刺激产生γ-干扰素和白介素-10的能力因CD4+CD25+调节T细胞加入后而显著减弱(P<0.05)。结论肺结核患者CD4+CD25+FoxP3+调节T细胞增多,通过抑制结核患者细胞免疫反应,参与肺结核的发病。

References

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