Regulatory B10 cells differentiate into antibody-secreting cells after transient IL-10 production in vivo

Academic Article

Abstract

  • Regulatory B cells that are functionally defined by their capacity to express IL-10 (B10 cells) downregulate inflammation and autoimmunity. In studies using well-defined IL-10 reporter mice, this rare B10 cell subset was also found to maintain a capacity for plasma cell differentiation. During a transient period of il10 transcription, the blimp1 and irf4 transcription factors were induced in B10 cells, whereas pax5 and bcl6 were downregulated as a significant fraction of B10 cells completed the genetic and phenotypic program leading to Ab-secreting cell differentiation in vitro and in vivo. B10 cell-derived IgM reacted with both self- and foreign Ags, whereas B10 cells generated Ag-specific IgG in response to immunizations. Moreover, B10 cells represented a significant source of serum IgM and IgG during adoptive-transfer experiments and produced Ag-specific, polyreactive and autoreactive Ab specificities that were consistent with their expression of a diverse AgR repertoire. Thereby, B10 cells limit inflammation and immune responses by the transient production of IL-10, and may facilitate clearance of their eliciting Ags through an inherent capacity to quickly generate polyreactive and/or Ag-specific Abs during humoral immune responses. Copyright © 2012 by The American Association of Immunologists, Inc.
  • Published In

    Digital Object Identifier (doi)

    Author List

  • Maseda D; Smith SH; DiLillo DJ; Bryant JM; Candando KM; Weaver CT; Tedder TF
  • Start Page

  • 1036
  • End Page

  • 1048
  • Volume

  • 188
  • Issue

  • 3