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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Targeted disruption of Traf5 gene causes defects in CD40- and CD27-mediated lymphocyte activation.

TRAF5 [tumor necrosis factor (TNF) receptor- associated factor 5] is implicated in NF-kappaB and c-Jun NH(2)-terminal kinase/stress-activated protein kinase activation by members of the TNF receptor superfamily, including CD27, CD30, CD40, and lymphotoxin-beta receptor. To investigate the functional role of TRAF5 in vivo, we generated TRAF5-deficient mice by gene targeting. Activation of either NF-kappaB or c-Jun NH(2)-terminal kinase/stress-activated protein kinase by tumor necrosis factor, CD27, and CD40 was not abrogated in traf5(-/-) mice. However, traf5(-/-) B cells showed defects in proliferation and up-regulation of various surface molecules, including CD23, CD54, CD80, CD86, and Fas in response to CD40 stimulation. Moreover, in vitro Ig production of traf5(-/-) B cells stimulated with anti-CD40 plus IL-4 was reduced substantially. CD27-mediated costimulatory signal also was impaired in traf5(-/-) T cells. Collectively, these results demonstrate that TRAF5 is involved in CD40- and CD27-mediated signaling.[1]


  1. Targeted disruption of Traf5 gene causes defects in CD40- and CD27-mediated lymphocyte activation. Nakano, H., Sakon, S., Koseki, H., Takemori, T., Tada, K., Matsumoto, M., Munechika, E., Sakai, T., Shirasawa, T., Akiba, H., Kobata, T., Santee, S.M., Ware, C.F., Rennert, P.D., Taniguchi, M., Yagita, H., Okumura, K. Proc. Natl. Acad. Sci. U.S.A. (1999) [Pubmed]
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