With(out) a little help from my friends: An IL-12/CD40L-mediated feed-forward loop between CD8+ T cells and DCs

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Abstract

CD40-CD40L interactions are important for both antigen-dependent B-cell differentiation and effector and memory T-cell formation. The prevailing view is that CD40L is expressed on activated CD4+ T cells, which enables them to provide help to high-affinity B cells in GCs and to license DCs for efficient induction of CD8+ T-cell responses. Interestingly, CD8+ T cells themselves can also express CD40L and, in this issue of the European Journal of Immunology, Thiel and colleagues [Eur. J. Immunol. 2013. 43: 1511-1517] show that CD40L expression on these cells can be part of a self-sustaining feed-forward loop, in which expression of CD40L is induced by IL-12 and TCR signaling. This provides a paradigm shift in our thinking about the requirements of effector CD8+ T-cell development and the role herein of CD4+ T cells to provide help in this process. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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APA

Nolte, M. A., & van Lier, R. A. W. (2013). With(out) a little help from my friends: An IL-12/CD40L-mediated feed-forward loop between CD8+ T cells and DCs. European Journal of Immunology, 43(6), 1445–1448. https://doi.org/10.1002/eji.201343644

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