Polyfunctional Mycobacterium tuberculosis-specific effector memory CD4+ T cells at sites of pleural TB.

Polyfunctional Mycobacterium tuberculosis-specific effector memory CD4+ T cells at sites of pleural TB.
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DOI:
10.1016/j.tube.2010.12.005
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发表时间:
2011-05
期刊:
Tuberculosis (Edinburgh, Scotland)
影响因子:
--
通讯作者:
Canaday DH
Canaday DH
中科院分区:
其他
文献类型:
--
作者:
El Fenniri L;Toossi Z;Aung H;El Iraki G;Bourkkadi J;Benamor J;Laskri A;Berrada N;Benjouad A;Mayanja-Kizza H;Betts MR;El Aouad R;Canaday DH

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胸膜结核(TB)是M。结核病(MTB)感染,尽管自发解决仍然是一个强有力的风险因素,为重新激活肺结核在大多数人。本研究旨在进一步了解胸膜结核部位免疫细胞的特征。与血液单个核细胞相比,胸水中的效应表型CD 4 + T细胞向记忆性CD 4 + T细胞显著转移,而远离幼稚CD 4 + T细胞,这些数据表明,效应T细胞能够迁移到活动性TB感染部位和/或原位分化为效应表型T细胞是高度扩增的。使用多参数流式细胞术分析,胸膜腔中的MTB特异性CD 4 + T细胞的显著部分是多功能的,证明了两种、三种或四种同时的功能,包括IFN-γ、IL-2、TNF-α和/或MIP 1-α产生。这些多功能细胞的更大比例的效应记忆,而不是中央记忆表型。这些多功能结核分枝杆菌特异性CD 4 + T细胞在胸膜结核病部位的作用需要进一步研究。
Pleural tuberculosis (TB) is a common presentation of M. tuberculosis (MTB) infection, and despite spontaneous resolution remains a strong risk factor for reactivation pulmonary TB in a majority of individuals. This study was undertaken to further understand the characteristics of immune cells at sites of pleural TB. A significant shift toward memory CD4+ T cells with an effector phenotype and away from naïve CD4+ T cells in pleural fluid as compared to blood mononuclear cells was found. These data suggest that effector T cells are capable of migrating to sites of active TB infection and/or the differentiation to effector phenotype T cells in situ is highly amplified. Using multiparameter flow cytometry analysis, a significant portion of MTB-specific CD4+ T cells in the pleural space were polyfunctional demonstrating two, three or four simultaneous functions including IFN-gamma, IL-2, TNF-alpha, and or MIP1-alpha production. A greater proportion of these polyfunctional cells were of effector memory rather than central memory phenotype. The role of these polyfunctional MTB-specific CD4+ T cells at sites of pleural TB requires further study.
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