首页> 外文期刊>Clinical immunology: The official journal of the Clinical Immunology Society >Characterization of a cytotoxic CD57+ T cell subset from patients with pulmonary tuberculosis.
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Characterization of a cytotoxic CD57+ T cell subset from patients with pulmonary tuberculosis.

机译:肺结核患者的细胞毒性CD57 + T细胞亚群的特征。

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We investigated the proportion, phenotype, and cytotoxicity of CD8+CD57+ and CD57- T cells in peripheral blood from 20 tuberculosis (TB)-patients and 20 healthy tuberculin skin test-positive donors. Our results showed an increase in CD8+CD57+ T cells from TB-patients as compared with those from age-matched healthy donors (p<0.0001). CD8+CD57+ T cells from TB-patients expressed CD69, perforin, granzyme-A, and a CD28-CD62L-CD161- phenotype without recognition for the alpha-galactosylceramide-CD1d complex. This cell subset also expressed TNF-alpha and IFN-gamma, under phorbol-myristate-acetate/ionomycin stimulation. Interestingly, the cytotoxicity against autologous monocytes was higher in CD57- cells from TB-patients and donors than their CD57+ counterparts, in the presence of Mycobacterium tuberculosis H37Rv culture filtrate. However, only CD8+CD57+ T cells from TB-patients exhibited spontaneous cytotoxicity against monocytes in the absence of antigen. Our results suggest that CD8+CD57+ T cells are a subset of effector cells that could be helpful to evaluate the cell-mediated immune response to M. tuberculosis.
机译:我们调查了来自20名结核病(TB)患者和20名健康结核菌素皮肤试验阳性供体的外周血CD8 + CD57 +和CD57-T细胞的比例,表型和细胞毒性。我们的结果显示,与年龄相匹配的健康供体相比,TB患者的CD8 + CD57 + T细胞增加(p <0.0001)。来自结核病患者的CD8 + CD57 + T细胞表达CD69,穿孔素,粒酶-A和CD28-CD62L-CD161-表型,但未识别出α-半乳糖基神经酰胺-CD1d复合物。在佛波-肉豆蔻酸酯-乙酸酯/离子霉素的刺激下,该细胞亚群也表达了TNF-α和IFN-γ。有趣的是,在结核分枝杆菌H37Rv培养滤液的存在下,来自结核病患者和供体的CD57细胞对自体单核细胞的细胞毒性高于其CD57 +对应细胞。然而,在没有抗原的情况下,只有来自结核病患者的CD8 + CD57 + T细胞表现出对单核细胞的自发细胞毒性。我们的结果表明,CD8 + CD57 + T细胞是效应细胞的一个子集,可能有助于评估细胞介导的针对结核分枝杆菌的免疫应答。

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