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Trends Immunol. 2011 May;32(5):202-11. doi: 10.1016/ Epub 2011 Mar 16.

Innate control of B cell responses.

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  • 1ICREA, Catalan Institute for Research and Advanced Studies, Barcelona Biomedical Research Park, Av. Dr. Aigüader 88, 08003 Barcelona, Spain.


Mature B cells generate protective immunity by undergoing immunoglobulin (Ig) class switching and somatic hypermutation, two Ig gene-diversifying processes that usually require cognate interactions with T cells that express CD40 ligand. This T cell-dependent pathway provides immunological memory but is relatively slow to occur. Thus, it must be integrated with a faster, T cell-independent pathway for B cell activation through CD40 ligand-like molecules that are released by innate immune cells in response to microbial products. Here, we discuss recent advances in our understanding of the interplay between the innate immune system and B cells, particularly at the mucosal interface. We also review the role of innate signals in the regulation of Ig diversification and production.

Copyright © 2011 Elsevier Ltd. All rights reserved.

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