Amelioration of graft versus host disease in humanized mice by exopolysaccharide from a commensal bacterium

نویسندگان

چکیده

Abstract Graft versus host disease (GVHD) is the major and often lethal complication of allogenic bone marrow transplantation. Prophylactic regimens for GVHD are given as standard pre-transplantation therapy; however, up to 60% these patients develop GVHD, require additional immunosuppressive intervention. We identified a probiotic exopolysaccharide (EPS) that induces inhibitory macrophages tolerogenic dendritic cells (DCs) inhibit T cell proliferation. tested if EPS-treated human DCs, derived in vitrofrom CD34 +cord blood cells, would allogeneic proliferation mixed lymphocyte reaction (MLR) found they did, demonstrating EPS can induce DCs vitro.We translated studies vivousing humanized mouse model aGvHD demonstrated administered at time transfer peripheral mononuclear (hPBMCs) significantly increased survival mice compared PBS-treated or no DCs. Several subsets have been described, e.g., cDCs, moDCs plasmacytoid each with different phenotypes functions. Using labeled EPS, we showed CD34-derived generated by treatment conventional (cDCs). binds two cDC populations, DC1 (cDC1) DC2 (cDC2), but only cDC1 were our MLR cultures. Our data indicate EPS-DCs, potentially cDC1, be used cell-based therapy mitigate humans. NIH 1R41AI155281-01

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Graft versus Host Disease

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ژورنال

عنوان ژورنال: Journal of Immunology

سال: 2023

ISSN: ['1550-6606', '0022-1767']

DOI: https://doi.org/10.4049/jimmunol.210.supp.173.20