Cell-to-cell transfer of M. tuberculosis antigens optimizes CD4 T cell priming.

Cell-to-cell transfer of M. tuberculosis antigens optimizes CD4 T cell priming.
复制标题

DOI:
10.1016/j.chom.2014.05.007
复制
发表时间:
2014-06-11
影响因子:
30.3
通讯作者:
Ernst JD
Ernst JD
中科院分区:
医学1区
文献类型:
--
作者:
Srivastava S;Ernst JD

文献摘要

参考文献

被引文献

相似文献

在结核分枝杆菌和其他呼吸道感染期间,最佳的T细胞激活需要病原体从肺转移到局部引流淋巴结(LN)。然而,感染的炎性单核细胞来源的树突状细胞(DC)将结核分枝杆菌运送到局部淋巴结时,激活CD4T细胞的效率相对较低,这可能是由于细菌对抗原提呈的抑制。我们发现,受感染的迁移性DC将结核分枝杆菌抗原释放为可溶的、未经处理的蛋白,供未受感染的居民淋巴结DC摄取和呈递。这种细菌蛋白从迁移性DC转移到当地DC的过程导致了抗原特异性CD4T细胞的最佳启动,这是控制结核病的关键。此外,这种机制不涉及整个细菌的转移,不同于细胞凋亡或外切体脱落。这些发现揭示了一种机制,即绕过病原体对受感染细胞提呈抗原的抑制,并产生控制感染的CD4T细胞反应。
During Mycobacterium tuberculosis and other respiratory infections, optimal T cell activation requires pathogen transport from the lung to a local draining lymph node (LN). However, the infected inflammatory monocyte-derived dendritic cells (DCs) that transport M. tuberculosis to the local lymph node are relatively inefficient at activating CD4 T cells, possibly due to bacterial inhibition of antigen presentation. We found that infected migratory DCs release M. tuberculosis antigens as soluble, unprocessed proteins for uptake and presentation by uninfected resident lymph node DCs. This transfer of bacterial proteins from migratory to local DCs results in optimal priming of antigen-specific CD4 T cells, which are essential in controlling tuberculosis. Additionally, this mechanism does not involve transfer of the whole bacterium and is distinct from apoptosis or exosome shedding. These findings reveal a mechanism that bypasses pathogen inhibition of antigen presentation by infected cells and generates CD4 T cell responses that control the infection.
DOI: 10.1016/j.chom.2009.10.007
发表时间: 2009-11-19
影响因子: 30.3
作者:
Hohl TM;Rivera A;Lipuma L;Gallegos A;Shi C;Mack M;Pamer EG
通讯作者: Pamer EG
DOI: 10.1016/j.chom.2010.05.010
发表时间: 2010-06-25
影响因子: 30.3
作者:
Ersland K;Wüthrich M;Klein BS
通讯作者: Klein BS
DOI: 10.1371/journal.ppat.1002063
发表时间: 2011-05
期刊: PLoS pathogens
影响因子: 6.7
作者:
Bold TD;Banaei N;Wolf AJ;Ernst JD
通讯作者: Ernst JD
DOI: 10.1172/jci31947
发表时间: 2007-08-01
影响因子: 15.9
作者:
Hinchey, Joseph;Lee, Sunhee;Porcelli, Steven A.
通讯作者: Porcelli, Steven A.
DOI: 10.1128/iai.70.8.4501-4509.2002
发表时间: 2002-08-01
影响因子: 3.1
作者:
Chackerian, AA;Alt, JM;Behar, SM
通讯作者: Behar, SM