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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/168922
Human secretory IgM emerges from plasma cells clonally related to gut memory B cells and targets highly diverse commensals
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Secretory immunoglobulin A (SIgA) enhances host-microbiota symbiosis, whereas SIgM remains poorly understood. We found that gut IgM+ plasma cells (PCs) were more abundant in humans than mice and clonally related to a large repertoire of memory IgM+ B cells disseminated throughout the intestine but rare in systemic lymphoid organs. In addition to sharing a gut-specific gene signature with memory IgA+ B cells, memory IgM+ B cells were related to some IgA+ clonotypes and switched to IgA in response to T cell-independent or T cell-dependent signals. These signals induced abundant IgM which, together with SIgM from clonally affiliated PCs, recognized mucus-embedded commensals. Bacteria recognized by human SIgM were dually coated by SIgA and showed increased richness and diversity compared to IgA-only-coated or uncoated bacteria. Thus, SIgM may emerge from pre-existing memory rather than newly activated naive IgM+ B cells and could help SIgA to anchor highly diverse commensal communities to mucus.
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MAGRI, Giuliana, COMERMA, Laura, PYBUS, Marc, SINTES, Jordi, LLIGÉ, David, SEGURA-GARZÓN, Daniel, BASCONES, Sabrina, YESTE, Ada, GRASSET, Emilie k., GUTZEIT, Cindy, UZZAN, Mathieu, RAMANUJAM, Meera, VAN ZELM, Menno c., ALBERO GONZÁLEZ, Raquel, VAZQUEZ, Ivonne, IGLESIAS, Mar, SERRANO, Sergi, MÁRQUEZ, Lucía, MERCADÉ GIL, M. elena, MEHANDRU, Saurabh, CERUTTI, Andrea. Human secretory IgM emerges from plasma cells clonally related to gut memory B cells and targets highly diverse commensals. _Immunity_. 2017. Vol. 47, núm. 1, pàgs. 118-134. [consulta: 24 de gener de 2026]. ISSN: 1074-7613. [Disponible a: https://hdl.handle.net/2445/168922]