2026-08-29T10:01:23Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/52512024-09-27T09:03:16Zcom_20.500.12105_19604com_20.500.12105_2051col_20.500.12105_19605col_20.500.12105_19607

00925njm 22002777a 4500 dc Leiva, Magdalena author Quintana, Juan A. author Ligos, Jose M. author Hidalgo, Andres author 2016 The life-long maintenance of haematopoietic stem and progenitor cells (HSPCs) critically relies on environmental signals produced by cells that constitute the haematopoietic niche. Here we report a cell-intrinsic mechanism whereby haematopoietic cells limit proliferation within the bone marrow, and show that this pathway is repressed by E-selectin ligand 1 (ESL-1). Mice deficient in ESL-1 display aberrant HSPC quiescence, expansion of the immature pool and reduction in niche size. Remarkably, the traits were transplantable and dominant when mutant and wild-type precursors coexisted in the same environment, but were independent of E-selectin, the vascular receptor for ESL-1. Instead, quiescence is generated by unrestrained production of the cytokine TGF beta by mutant HSPC, and in vivo or in vitro blockade of the cytokine completely restores the homeostatic properties of the haematopoietic niche. These findings reveal that haematopoietic cells, including the more primitive compartment, can actively shape their own environment. Nat Commun. 2016; 7:10222 10.1038/ncomms10222 2041-1723 Nature Communications 26742601 http://hdl.handle.net/20.500.12105/5251 E-SELECTIN LIGANDS TRANSFORMING GROWTH-FACTOR-BETA-1 PROGENITOR CELLS NICHE QUIESCENCE IDENTIFICATION MACROPHAGES NEUTROPHILS HIBERNATION TGF-BETA-1 Haematopoietic ESL-1 enables stem cell proliferation in the bone marrow by limiting TGF beta availability