The vascular niche controls Drosophila hematopoiesis via Fibroblast Growth Factor signaling
The vascular niche controls Drosophila hematopoiesis via Fibroblast Growth Factor signaling
Abstract In adult mammals, hematopoiesis, the production of blood cells from hematopoietic stem and progenitor cells (HSPCs), is tightly regulated by extrinsic signals from the microenvironment called “niche”. Bone marrow HSPCs are heterogeneous and controlled by both endosteal and vascular niches. The Drosophila hematopoietic lymph gland is located along the cardiac tube which corresponds to the vascular system. In the lymph gland, the niche called Posterior Signaling Center controls only a subset of the heterogeneous hematopoietic progenitor population indicating that additional signals are necessary. Here we report that the vascular system acts as a second niche to control lymph gland homeostasis. The FGF ligand Branchless produced by vascular cells activates the FGF pathway in hematopoietic progenitors. By regulating intracellular calcium levels, FGF signaling maintains progenitor pools and prevents blood cell differentiation. This study reveals that two niches contribute to the control of Drosophila blood cell homeostasis through their differential regulation of progenitors.
Tian Yushun、Destalminil-Letourneau Manon、Crozatier Mich¨¨le、Morin-Poulard Isma?l、Vanzo Nathalie
Centre de Biologie du D¨|veloppement (CBD), Centre de Biologie Int¨|grative (CBI), Universit¨| de Toulouse, CNRS, UPSCentre de Biologie du D¨|veloppement (CBD), Centre de Biologie Int¨|grative (CBI), Universit¨| de Toulouse, CNRS, UPS||CellProtheraCentre de Biologie du D¨|veloppement (CBD), Centre de Biologie Int¨|grative (CBI), Universit¨| de Toulouse, CNRS, UPSCentre de Biologie du D¨|veloppement (CBD), Centre de Biologie Int¨|grative (CBI), Universit¨| de Toulouse, CNRS, UPSCentre de Biologie du D¨|veloppement (CBD), Centre de Biologie Int¨|grative (CBI), Universit¨| de Toulouse, CNRS, UPS
细胞生物学分子生物学昆虫学
hematopoiesismicroenvironment/nichelymph glandcardiac/vascular cellsDrosophilaFGF signaling
Tian Yushun,Destalminil-Letourneau Manon,Crozatier Mich¨¨le,Morin-Poulard Isma?l,Vanzo Nathalie.The vascular niche controls Drosophila hematopoiesis via Fibroblast Growth Factor signaling[EB/OL].(2025-03-28)[2025-08-02].https://www.biorxiv.org/content/10.1101/2020.11.26.400127.点此复制
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