Prominent Role for Plasmacytoid Dendritic Cells in Mucosal T Cell-Independent IgA Induction

Hiroyuki Tezuka, Yukiko Abe, Jumpei Asano, Taku Sato, Jiajia Liu, Makoto Iwata, Toshiaki Ohteki

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)

Abstract

Although both conventional dendritic cells (cDCs) and plasmacytoid dendritic cells (pDCs) are present in the gut-associated lymphoid tissues (GALT), the roles of pDCs in the gut remain largely unknown. Here we show a critical role for pDCs in T cell-independent (TI) IgA production by B cells in the GALT. When pDCs of the mesenteric lymph nodes (MLNs) and Peyer's patches (PPs) (which are representative GALT) were cultured with naive B cells to induce TI IgA class switch recombination (CSR), IgA production was substantially higher than in cocultures of these cells with cDCs. IgA production was dependent on APRIL and BAFF production by pDCs. Importantly, pDC expression of APRIL and BAFF was dependent on stromal cell-derived type I IFN signaling under steady-state conditions. Our findings provide insight into the molecular basis of pDC conditioning to induce mucosal TI IgA production, which may lead to improvements in vaccination strategies and treatment for mucosal-related disorders.

Original languageEnglish
Pages (from-to)247-257
Number of pages11
JournalImmunity
Volume34
Issue number2
DOIs
Publication statusPublished - 25-02-2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology
  • Infectious Diseases

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