Regulation of antigen presentation by Mycobacterium tuberculosis: a role for Toll-like receptors.
Regulation of antigen presentation by Mycobacterium tuberculosis: a role for Toll-like receptors.
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结核分枝杆菌对抗原呈递的调节:Toll 样受体的作用。
DOI:
10.1038/nrmicro2321
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发表时间:
2010-04
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影响因子:
--
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中科院分区:
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Mycobacterium tuberculosis survives in antigen-presenting cells (APCs) such as macrophages and dendritic cells. APCs present antigens in association with major histocompatibility complex (MHC) class II molecules to stimulate CD4+ T cells, and this process is essential to contain M. tuberculosis infection. Immune evasion allows M. tuberculosis to establish persistent or latent infection in macrophages and results in Toll-like receptor 2 (TLR2)-dependent inhibition of MHC class II transactivator expression, MHC class II molecule expression and antigen presentation. This reduction of antigen presentation might reflect a general mechanism of negative-feedback regulation that prevents excessive T cell-mediated inflammation and that M. tuberculosis has subverted to create a niche for survival in infected macrophages and evasion of recognition by CD4+ T cells.
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