Intravital imaging reveals limited antigen presentation and T cell effector function in mycobacterial granulomas.
Intravital imaging reveals limited antigen presentation and T cell effector function in mycobacterial granulomas.
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DOI:
10.1016/j.immuni.2011.03.022
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发表时间:
2011-05-27
期刊:
影响因子:
32.4
通讯作者:
Germain RN
中科院分区:
文献类型:
--
作者:
Egen JG;Rothfuchs AG;Feng CG;Horwitz MA;Sher A;Germain RN
Cell-mediated adaptive immunity is critical for host defense, but little is known about T cell behavior during delivery of effector function. Here we investigate relationships among antigen presentation, T cell motility, and local production of effector cytokines by CD4+ T cells within hepatic granulomas triggered by Bacille Calmette-Guérin or Mycobacterium tuberculosis. At steady-state, only small fractions of mycobacteria-specific T cells showed antigen-induced migration arrest within granulomas, resulting in low-level, polarized secretion of cytokines. However, exogenous antigen elicited rapid arrest and robust cytokine production by the vast majority of effector T cells. These findings suggest that limited antigen presentation and/or recognition within granulomas evoke a muted T cell response drawing on only a fraction of the host’s potential effector capacity. Our results provide new insights into the regulation of host protective functions, especially how antigen availability influences T cell dynamics and in turn, effector T cell function during chronic infection.
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DOI:
10.1084/jem.20021690
发表时间:
2003-03-17
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Reinhardt RL;Bullard DC;Weaver CT;Jenkins MK
通讯作者:
Jenkins MK
DOI:
10.1038/nrmicro2321
发表时间:
2010-04
期刊:
Nature reviews. Microbiology
影响因子:
--
作者:
通讯作者:
--
影响因子:
64.8
作者:
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通讯作者:
McGavern, Dorian B.
影响因子:
15.3
作者:
Mogues, T;Goodrich, M E;Ryan, L;LaCourse, R;North, R J
通讯作者:
North, R J
影响因子:
30.5
作者:
Henrickson, Sarah E.;Mempel, Thorsten R.;von Andrian, Ulrich H.
通讯作者:
von Andrian, Ulrich H.