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首页> 外文期刊>Clinical and diagnostic laboratory immunology >Mycobacterium tuberculosis induces apoptosis in gamma/delta T lymphocytes from patients with advanced clinical forms of active tuberculosis.
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Mycobacterium tuberculosis induces apoptosis in gamma/delta T lymphocytes from patients with advanced clinical forms of active tuberculosis.

机译:结核分枝杆菌可诱发晚期临床型活动性结核病患者的γ/δT淋巴细胞凋亡。

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Antigens from inactivated Mycobacterium tuberculosis H37Ra induce activation in a subpopulation of gamma/delta (gamma/delta) T lymphocytes in a manner that resembles that of superantigens from alpha/beta T cells. After culture in vitro with H37Ra proteins, gamma/delta T lymphocytes from patients with advanced clinical forms of active tuberculosis (ACF-TBC) display cytotoxic activity against homotypic target cells exposed to H37Ra. Cytotoxicity by gamma/delta T lymphocytes from ACF-TBC patients occurs in a range similar to that observed in healthy subjects. Following activation, H37Ra-stimulated gamma/delta T lymphocytes from healthy subjects did proliferate in the presence of exogenous recombinant human interleukin 2. However, under the same conditions, gamma/delta T lymphocytes from ACF-TBC patients not only did not proliferate but died by apoptosis. These results suggest that in gamma/delta T lymphocytes from patients with ACF-TBC, antigens from M. tuberculosis may induce cell activation that leads to apoptotic cell death.
机译:来自灭活的结核分枝杆菌H37Ra的抗原以类似于来自α/βT细胞的超抗原的方式诱导了γ/δ(γ/δ)T淋巴细胞亚群的活化。用H37Ra蛋白进行体外培养后,患有晚期临床活动型肺结核(ACF-TBC)的患者的γ/δT淋巴细胞对暴露于H37Ra的同型靶细胞表现出细胞毒活性。来自ACF-TBC患者的γ/δT淋巴细胞的细胞毒性发生在与健康受试者中观察到的相似的范围内。激活后,健康受试者的H37Ra刺激的γ/δT淋巴细胞确实在外源重组人白介素2存在下增殖。但是,在相同条件下,ACF-TBC患者的γ/δT淋巴细胞不仅不增殖,而且死亡。通过凋亡。这些结果表明,在患有ACF-TBC的患者的γ/δT淋巴细胞中,结核分枝杆菌的抗原可能诱导细胞活化,从而导致凋亡性细胞死亡。

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