Prominent role for T cell-derived tumour necrosis factor for sustained control of Mycobacterium tuberculosis infection.

Prominent role for T cell-derived tumour necrosis factor for sustained control of Mycobacterium tuberculosis infection.
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DOI:
10.1038/srep01809
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Jacobs, Muazzam
Jacobs, Muazzam
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Allie, Nasiema;Grivennikov, Sergei I.;Keeton, Roanne;Hsu, Nai-Jen;Bourigault, Marie-Laure;Court, Nathalie;Fremond, Cecile;Yeremeev, Vladimir;Shebzukhov, Yuriy;Ryffel, Bernhard;Nedospasov, Sergei A.;Quesniaux, Valerie F. J.;Jacobs, Muazzam

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肿瘤坏死因子(TNF)是宿主控制M。结核病,但先天性和适应性免疫应答中TNF的相对贡献尚不清楚。使用细胞类型特异性TNF缺失研究了结核病中骨髓与T细胞来源的TNF功能。在巨噬细胞/中性粒细胞中TNF表达缺陷的小鼠表现出对M.结核病,但招募活化的,产生TNF的CD 4+和CD 8 + T细胞和控制慢性感染。引人注目的是,T细胞中TNF表达不足导致早期控制,但在慢性感染期间易感性和最终死亡率增加肺部病理。髓细胞和T细胞中的TNF失活使小鼠对类似于完全TNF缺陷小鼠的表型的感染非常敏感,表明髓细胞和T细胞是协作用于结核病宿主控制的主要TNF来源。因此,虽然来自骨髓细胞的TNF介导早期免疫功能,但T细胞衍生的TNF对于在慢性结核感染期间维持保护是必不可少的。
Tumour Necrosis Factor (TNF) is critical for host control of M. tuberculosis, but the relative contribution of TNF from innate and adaptive immune responses during tuberculosis infection is unclear. Myeloid versus T-cell-derived TNF function in tuberculosis was investigated using cell type-specific TNF deletion. Mice deficient for TNF expression in macrophages/neutrophils displayed early, transient susceptibility to M. tuberculosis but recruited activated, TNF-producing CD4+ and CD8+ T-cells and controlled chronic infection. Strikingly, deficient TNF expression in T-cells resulted in early control but susceptibility and eventual mortality during chronic infection with increased pulmonary pathology. TNF inactivation in both myeloid and T-cells rendered mice critically susceptible to infection with a phenotype resembling complete TNF deficient mice, indicating that myeloid and T-cells are the primary TNF sources collaborating for host control of tuberculosis. Thus, while TNF from myeloid cells mediates early immune function, T-cell derived TNF is essential to sustain protection during chronic tuberculosis infection.
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