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Citation
Destalminil-Letourneau, M., Morin-Poulard, I., Tian, Y., Vanzo, N., Crozatier, M. (2021). The vascular niche controls Drosophila hematopoiesis via fibroblast growth factor signaling.  eLife 10(): e64672.
FlyBase ID
FBrf0247564
Publication Type
Research paper
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 ofDrosophila blood cell homeostasis through their differential regulation of progenitors.

PubMed ID
PubMed Central ID
PMC7781598 (PMC) (EuropePMC)
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    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    eLife
    Title
    eLife
    ISBN/ISSN
    2050-084X
    Data From Reference
    Alleles (114)
    Gene Groups (1)
    Genes (62)
    Natural transposons (1)
    Insertions (5)
    Experimental Tools (3)
    Transgenic Constructs (105)