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Triggering the succinate receptor GPR91 on dendritic cells enhances immunity
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Journal Article
Triggering the succinate receptor GPR91 on dendritic cells enhances immunity
2008
Overview
Succinate is a Krebs cycle intermediate. Carballido and colleagues show that succinate released by necrotic cells also functions as an 'alarmin' by activating dendritic cells that express the succinate receptor GPR91.
Succinate acts as an extracellular mediator signaling through the G protein–coupled receptor GPR91. Here we show that dendritic cells had high expression of GPR91. In these cells, succinate triggered intracellular calcium mobilization, induced migratory responses and acted in synergy with Toll-like receptor ligands for the production of proinflammatory cytokines. Succinate also enhanced antigen-specific activation of human and mouse helper T cells. GPR91-deficient mice had less migration of Langerhans cells to draining lymph nodes and impaired tetanus toxoid–specific recall T cell responses. Furthermore, GPR91-deficient allografts elicited weaker transplant rejection than did the corresponding grafts from wild-type mice. Our results suggest that the succinate receptor GPR91 is involved in sensing immunological danger, which establishes a link between immunity and a metabolite of cellular respiration.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
/ Biomedical and Life Sciences
/ Calcium
/ Dendritic Cells - immunology
/ Dendritic Cells - metabolism
/ Graft Rejection - immunology
/ Humans
/ Mice
/ Receptors, Antigen, T-Cell - agonists
/ Receptors, Antigen, T-Cell - antagonists & inhibitors
/ Receptors, Antigen, T-Cell - immunology
/ Receptors, G-Protein-Coupled - agonists
/ Receptors, G-Protein-Coupled - genetics
/ Receptors, G-Protein-Coupled - immunology
/ Signal Transduction - immunology
/ Succinic Acid - pharmacology
