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- W2092412131 abstract "Abstract Adiponectin (APN), a cytokine constitutively produced in fat tissue, has been shown to exert anti‐inflammatory effects in various disease models. While the influence of APN on monocytic cells has been extensively studied in vitro, little is known about its role in T cells. In this study, we show that while <10% of human peripheral blood T cells express adiponectin receptors (AdipoRs) on their surface, most T cells store AdipoRs in intracellular compartments. AdipoRs colocalized with immune regulatory molecules CTLA‐4 and TIRC7 within clathrin‐coated vesicles. After stimulation, the expression of adiponectin receptor 1 (AdipoR1) and AdipoR2 was upregulated on the surface of antigen‐specific T cells, as determined by tetramer or CD137 staining, and AdipoR1 and AdipoR2 coexpressed with CTLA‐4. Addition of APN resulted in a significant diminution of antigen‐specific T‐cell expansion. Mechanistically, APN enhanced apoptosis and inhibited proliferation of antigen‐specific T‐cell lines. Further, APN directly inhibited cytokine production in response to antigen stimulation. In line with the in vitro data, APN‐deficient (knockout, KO) mice had higher frequencies of CD137 + T cells upon Coxsackie B virus infection. Altogether, our data suggest that APN is a novel negative T‐cell regulator. In contrast to the CTLA‐4 ligand B7 only expressed on APCs, APN is abundant in human plasma." @default.
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- W2092412131 date "2011-06-06" @default.
- W2092412131 modified "2023-10-18" @default.
- W2092412131 title "Adiponectin is a negative regulator of antigen-activated T cells" @default.
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- W2092412131 doi "https://doi.org/10.1002/eji.201041349" @default.
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