B1 Cells Promote Pancreas Infiltration by Autoreactive T Cells

Research output: Contribution to journalArticle


  • GA Ryan
  • Chunjing Wang
  • EM Schmidt
  • LE Clough
  • K Dunussi-Joannopoulos

Colleges, School and Institutes


The entry of autoreactive T cells into the pancreas is a critical checkpoint in the development of autoimmune diabetes. In this study, we identify a role for B1 cells in this process using the DO11 X RIP-mOVA mouse model. In transgenic mice with islet-specific T cells, but no B cells, T cells are primed in the pancreatic lymph node but fail to enter the pancreas. Reconstitution of the B1 cell population by adoptive transfer permits extensive T cell pancreas infiltration. Reconstituted B1 cells traffic to the pancreas and modify expression of adhesion molecules on pancreatic vasculature, notably VCAM-1. Despite substantial pancreas infiltration, islet destruction is minimal unless regulatory T cells are depleted. These data identify a role for B1 cells in permitting circulating islet-specific T cells to access their Ag-bearing tissue and emphasize the existence of multiple checkpoints to regulate autoimmune disease. The Journal of Immunology, 2010, 185: 2800-2807.


Original languageEnglish
Pages (from-to)2800-2807
Number of pages8
JournalJournal of Immunology
Issue number5
Publication statusPublished - 1 Sep 2010