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T cell receptor-mediated activation of CD4+CD44hi T cells bypasses Bcl10: an implication of differential NF-kappaB dependence of naïve and memory T cells during T cell receptor-mediated responses. J Biol Chem 2008 Sep 05;283(36):24392-9

Date

06/28/2008

Pubmed ID

18583339

Pubmed Central ID

PMC2528987

DOI

10.1074/jbc.M802344200

Scopus ID

2-s2.0-54049097968   12 Citations

Abstract

Previous studies have demonstrated that Bcl10 (B-cell leukemia/lymphoma 10) is essential for T cell receptor-mediated NF-kappaB activation and subsequent proliferation and interleukin 2 (IL2) production. However, here we demonstrate that, contrary to expectations, Bcl10 is differentially required for T cell activation, including for both proliferation and cytokine production. When CD4+ and CD8+ T cells were divided based on expression levels of CD44, which distinguishes naïve cells (CD44lo) versus those that are antigen-experienced (CD44hi), IL2 production by and proliferation of CD4+CD44lo naïve cells and both subpopulations of CD8+ T cells were clearly Bcl10-dependent, whereas these same functional properties of CD4+CD44hi T cells occurred largely independent of Bcl10. As with the other subpopulations of T cells, CD4+CD44hi T cells did not activate the NF-kappaB pathway in the absence of Bcl10; nevertheless, these CD4+CD44hi antigen-experienced T cells efficiently secreted IL2 after T cell receptor stimulation. Strikingly, therefore, T cell receptor-mediated IL2 production in these cells is NF-kappaB-independent. Our studies suggest that antigen-experienced CD4+ T cells differ from their naïve counterparts and from CD8+ T cells in their ability to achieve activation independent of the Bcl10/NF-kappaB pathway.

Author List

Zeng H, Chen Y, Yu M, Xue L, Gao X, Morris SW, Wang D, Wen R

Author

Demin Wang PhD Assistant Professor in the Microbiology and Immunology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Adaptor Proteins, Signal Transducing
Animals
B-Cell CLL-Lymphoma 10 Protein
CD4-Positive T-Lymphocytes
CD8-Positive T-Lymphocytes
Cell Proliferation
Hyaluronan Receptors
Immunologic Memory
Interleukin-12
Lymphocyte Activation
Mice
Mice, Knockout
NF-kappa B
Receptors, Antigen, T-Cell
jenkins-FCD Prod-398 336d56a365602aa89dcc112f077233607d6a5abc