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  1. 1

    المساهمون: National Institutes of Health (US), International Scholarship at The University of Cambridge, European Commission, European Research Council, MRC Cambridge Stem Cell Institute, National Health Institute Blood and Transplant (UK), Cancer Research UK, Wellcome Trust, García-García, Andrés [0000-0002-8797-649X], Pérez-Simón, José A [0000-0003-3616-6101], Göttgens, Berthold [0000-0001-6302-5705], Méndez-Ferrer, Simón [0000-0002-9805-9988], Apollo - University of Cambridge Repository, Universidad de Sevilla. Departamento de Medicina, Gottgens, Berthold [0000-0001-6302-5705]

    المصدر: Nature Communications, Vol 13, Iss 1, Pp 1-13 (2022)
    Digital.CSIC. Repositorio Institucional del CSIC
    instname
    Nature Communications

    الوصف: The sympathetic nervous system has been evolutionary selected to respond to stress and activates haematopoietic stem cells via noradrenergic signals. However, the pathways preserving haematopoietic stem cell quiescence and maintenance under proliferative stress remain largely unknown. Here we found that cholinergic signals preserve haematopoietic stem cell quiescence in bone-associated (endosteal) bone marrow niches. Bone marrow cholinergic neural signals increase during stress haematopoiesis and are amplified through cholinergic osteoprogenitors. Lack of cholinergic innervation impairs balanced responses to chemotherapy or irradiation and reduces haematopoietic stem cell quiescence and self-renewal. Cholinergic signals activate α7 nicotinic receptor in bone marrow mesenchymal stromal cells leading to increased CXCL12 expression and haematopoietic stem cell quiescence. Consequently, nicotine exposure increases endosteal haematopoietic stem cell quiescence in vivo and impairs hematopoietic regeneration after haematopoietic stem cell transplantation in mice. In humans, smoking history is associated with delayed normalisation of platelet counts after allogeneic haematopoietic stem cell transplantation. These results suggest that cholinergic signals preserve stem cell quiescence under proliferative stress.
    The sympathetic nervous system has been shown to respond to stress and activate haematopoietic stem cells. Here they show that cholinergic signals in the bone marrow preserve haematopoietic stem cell quiescence and self-renewal under proliferative stress.

    وصف الملف: application/pdf; application/zip; text/xml

  2. 2

    المساهمون: German Cancer Research Center - Deutsches Krebsforschungszentrum [Heidelberg] (DKFZ), Heidelberg Institute for Stem Cell Technology and Experimental Medicine, Heidelberg University Hospital [Heidelberg], University of Groningen [Groningen], Heidelberg University, Développement Cancer et Thérapies Ciblées [Lyon] (LabEx DEVweCAN), Université de Lyon, Centre de Recherche en Cancérologie de Lyon (UNICANCER/CRCL), Centre Léon Bérard [Lyon]-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Albert Einstein College of Medicine [New York], Max Planck Institute of Immunobiology and Epigenetics (MPI-IE), Max-Planck-Gesellschaft, University of Cambridge [UK] (CAM), NHS Blood and Transplant [London, UK], German Cancer Consortium [Heidelberg] (DKTK), Stem Cell Aging Leukemia and Lymphoma (SALL), Rama, Nicolas [0000-0003-1614-7755], Maryanovich, Maria [0000-0002-2015-0538], Gibert, Benjamin [0000-0002-5295-3124], Zwart, Erik [0000-0002-4552-003X], Zhang, Dachuan [0000-0002-1746-275X], Mendez-Ferrer, Simon [0000-0002-9805-9988], Heikenwälder, Mathias [0000-0002-3135-2274], Bystrykh, Leonid [0000-0001-6924-5602], Frenette, Paul S [0000-0003-0862-9922], de Haan, Gerald [0000-0001-9706-0138], Cabezas-Wallscheid, Nina [0000-0003-0870-0530], Trumpp, Andreas [0000-0002-6212-3466], Apollo - University of Cambridge Repository, Frenette, Paul S. [0000-0003-0862-9922]

    المصدر: Nature Communications
    Nature Communications, Nature Publishing Group, 2021, 12 (1), ⟨10.1038/s41467-020-20801-0⟩
    Nature Communications, 12(1):608. Nature Publishing Group
    Nature Communications, Vol 12, Iss 1, Pp 1-15 (2021)

    الوصف: Haematopoietic stem cells (HSCs) are characterized by their self-renewal potential associated to dormancy. Here we identify the cell surface receptor neogenin-1 as specifically expressed in dormant HSCs. Loss of neogenin-1 initially leads to increased HSC expansion but subsequently to loss of self-renewal and premature exhaustion in vivo. Its ligand netrin-1 induces Egr1 expression and maintains quiescence and function of cultured HSCs in a Neo1 dependent manner. Produced by arteriolar endothelial and periarteriolar stromal cells, conditional netrin-1 deletion in the bone marrow niche reduces HSC numbers, quiescence and self-renewal, while overexpression increases quiescence in vivo. Ageing associated bone marrow remodelling leads to the decline of netrin-1 expression in niches and a compensatory but reversible upregulation of neogenin-1 on HSCs. Our study suggests that niche produced netrin-1 preserves HSC quiescence and self-renewal via neogenin-1 function. Decline of netrin-1 production during ageing leads to the gradual decrease of Neo1 mediated HSC self-renewal.
    Haematopoietic stem cells (HSCs) are characterized by their self-renewal potential and associated dormancy. Here the authors show that niche produced netrin-1 preserves HSC quiescence and self-renewal via neogenin-1, and that decline of netrin-1 production during ageing leads to decreased Neo1 mediated HSC self-renewal.

    وصف الملف: application/pdf; application/zip; text/xml

  3. 3

    الوصف: Funder: Studienstiftung des Deutschen Volkes (German National Academic Foundation); doi: https://doi.org/10.13039/501100004350
    Funder: Heinrich F.C. Behr Stiftung
    Funder: Dietmar Hopp Stiftung; doi: https://doi.org/10.13039/501100005941
    Haematopoietic stem cells (HSCs) are characterized by their self-renewal potential associated to dormancy. Here we identify the cell surface receptor neogenin-1 as specifically expressed in dormant HSCs. Loss of neogenin-1 initially leads to increased HSC expansion but subsequently to loss of self-renewal and premature exhaustion in vivo. Its ligand netrin-1 induces Egr1 expression and maintains quiescence and function of cultured HSCs in a Neo1 dependent manner. Produced by arteriolar endothelial and periarteriolar stromal cells, conditional netrin-1 deletion in the bone marrow niche reduces HSC numbers, quiescence and self-renewal, while overexpression increases quiescence in vivo. Ageing associated bone marrow remodelling leads to the decline of netrin-1 expression in niches and a compensatory but reversible upregulation of neogenin-1 on HSCs. Our study suggests that niche produced netrin-1 preserves HSC quiescence and self-renewal via neogenin-1 function. Decline of netrin-1 production during ageing leads to the gradual decrease of Neo1 mediated HSC self-renewal.