Humoral autoimmunity in mice overexpressing B cell surface CD19: vital role for MHC class II.


Journal Article

B6 mice bearing a transgene (Tg) for human CD19 (hCD19) harbor increased numbers of splenic Ig-secreting cells (IgSC), increased serum levels of total Ig and autoantibodies, but decreased numbers of splenic B cells. To assess the influence of MHC class II (MHCII) to this phenotype, MHCII-deficient CD19-Tg mice were generated. Compared to MHCII-sufficient CD19-Tg mice, splenic IgSC numbers and serum Ig and autoantibody levels were markedly diminished, and the decrease in splenic B cell numbers was aggravated. Remarkably, genetic reconstitution of these MHCII-deficient mice with a human DQ8 Tg resulted in a hierarchical restorative pattern. Restoration of splenic B cell numbers was complete; restoration of numbers of splenic IgSC and of serum Ig levels was partial; and restoration of circulating autoantibody levels was virtually non-existent. Thus, MHCII expression has a profound effect on B cells which can be uncoupled from global Ig and autoantibody production in the hCD19-Tg model. This raises the possibility that MHCII affects B cells in a manner that, at least in part, is independent of helper T cell function.

Full Text

Duke Authors

Cited Authors

  • Stohl, W; Xu, D; Kim, KS; Tedder, TF; Sato, S

Published Date

  • September 2005

Published In

Volume / Issue

  • 116 / 3

Start / End Page

  • 257 - 264

PubMed ID

  • 15963762

Pubmed Central ID

  • 15963762

International Standard Serial Number (ISSN)

  • 1521-6616

Digital Object Identifier (DOI)

  • 10.1016/j.clim.2005.04.003


  • eng

Conference Location

  • United States