Peripheral tolerance via the anterior chamber of the eye: Role of B cells in MHC class I and II antigen presentation
Ags introduced into the anterior chamber (AC) of the eye induce a form of peripheral immune tolerance termed AC-associated immune deviation (ACAID). ACAID mitigates ocular autoimmune diseases and promotes corneal allograft survival. Ags injected into the AC are processed by F4/80(+) APCs, which migrate to the thymus and spleen. In the spleen, ocular APCs induce the development of Ag-specific B cells that act as ancillary APCs and are required for ACAID induction. In this study, we show that ocular-like APCs elicit the generation of Ag-specific splenic B cells that induce ACAID. However, direct cell contact between ocular-like APCs and splenic B cells is not necessary for the induction of ACAID B cells. Peripheral tolerance produced by ACAID requires the participation of ACAID B cells, which induce the generation of both CD4(+) regulatory T cells (Tregs) and CD8(+) Tregs. Using in vitro and in vivo models of ACAID, we demonstrate that ACAID B cells must express both MHC class I and 11 molecules for the generation of Tregs. These results suggest that peripheral tolerance induced through the eye requires Ag-presenting B cells that simultaneously present Ags on both MHC class I and 11 molecules.
American Association of Immunologists
Ashour, H. M., & Niederkorn, J. Y. (2006). Peripheral tolerance via the anterior chamber of the eye: Role of B cells in MHC class I and II antigen presentation. Journal of Immunology, 176(10), 5950–5957. https://doi.org/10.4049/jimmunol.176.10.5950
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