Type I IFN enhances follicular B cell contribution to the T cell-independent antibody response

Cristina L. Swanson, Timothy J. Wilson, Pamela Strauch, Marco Colonna, Roberta Pelanda, Raul M. Torres

Research output: Contribution to journalArticlepeer-review

102 Scopus citations

Abstract

Humoral immunity to viruses and encapsulated bacteria is comprised of T cell-independent type 2 (TI-2) antibody responses that are characterized by rapid antibody production by marginal zone and B1 B cells. We demonstrate that toll-like receptor (TLR) ligands influence the TI-2 antibody response not only by enhancing the overall magnitude but also by skewing this response to one that is dominated by IgG isotypes. Importantly, TLR ligands facilitate this response by inducing type I interferon (IFN), which in turn elicits rapid and significant amounts of antigen-specific IgG2c predominantly from FO (follicular) B cells. Furthermore, we show that although the IgG2c antibody response requires B cell-autonomous IFN-α receptor signaling, it is independent of B cell-intrinsic TLR signaling. Thus, innate signals have the capacity to enhance TI-2 antibody responses by promoting participation of FO B cells, which then elaborate effective IgG pathogen antibodies.

Original languageEnglish
Pages (from-to)1485-1500
Number of pages16
JournalJournal of Experimental Medicine
Volume207
Issue number7
DOIs
StatePublished - Jul 5 2010

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