Differential requirement for CARMA1 in agonist-selected T-cell development.
Differential requirement for CARMA1 in agonist-selected T-cell development.
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DOI:
10.1002/eji.200838734
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发表时间:
2009-01
影响因子:
5.4
通讯作者:
Xavier, Ramnik J.
中科院分区:
文献类型:
--
作者:
Medoff, Benjamin D.;Sandall, Barry P.;Landry, Aimee;Nagahama, Kiyotaka;Mizoguchi, Atsushi;Luster, Andrew D.;Xavier, Ramnik J.
Caspase recruitment domain-containing membrane-associated guanylate kinase protein-1 (CARMA1) is a critical component of the nuclear factor κB (NF-κB) signaling cascade mediated by T cell receptor (TCR) engagement. In addition to activation of naïve T cells, TCR signaling is important for the development of agonist-selected T cell subsets such as regulatory T cells (Treg), natural killer T cells (NKT), and CD8ααT cells. However, little is known about the role of CARMA1 in the development of these lineages. Here we show that CARMA1-deficient mice (CARMA1−/−) have altered populations of specific subsets of agonist-selected T cells. Specifically, CARMA1−/− mice have impaired natural and adaptive Treg development, while NKT cell numbers are normal compared to wild-type mice. Interestingly, CD8αα T cells, which may also be able to develop through an extrathymic selection pathway, are enriched in the gut of CARMA1−/− mice, while memory-phenotype CD4+ T cells (CD62Llow/CD44high) are present at reduced numbers in the periphery. These results indicate that CARMA1 is essential for Treg development, but is not necessary for the development of other agonist-selected T cell subsets. Overall, these data reveal an important but differential role for CARMA1-mediated TCR signaling in T cell development.
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