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2016 ; 27
(7
): 1984-95
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Hemovascular Progenitors in the Kidney Require Sphingosine-1-Phosphate Receptor 1
for Vascular Development
#MMPMID26534925
Hu Y
; Li M
; Göthert JR
; Gomez RA
; Sequeira-Lopez ML
J Am Soc Nephrol
2016[Jul]; 27
(7
): 1984-95
PMID26534925
show ga
The close relationship between endothelial and hematopoietic precursors during
early development of the vascular system suggested the possibility of a common
yet elusive precursor for both cell types. Whether similar or related progenitors
for endothelial and hematopoietic cells are present during organogenesis is
unclear. Using inducible transgenic mice that specifically label endothelial and
hematopoietic precursors, we performed fate-tracing studies combined with
colony-forming assays and crosstransplantation studies. We identified a
progenitor, marked by the expression of helix-loop-helix transcription factor
stem cell leukemia (SCL/Tal1). During organogenesis of the kidney, SCL/Tal1(+)
progenitors gave rise to endothelium and blood precursors with multipotential
colony-forming capacity. Furthermore, appropriate morphogenesis of the kidney
vasculature, including glomerular capillary development, arterial mural cell
coating, and lymphatic vessel development, required sphingosine 1-phosphate (S1P)
signaling via the G protein-coupled S1P receptor 1 in these progenitors. Overall,
these results show that SCL/Tal1(+) progenitors with hemogenic capacity originate
and differentiate within the early embryonic kidney by hemovasculogenesis (the
concomitant formation of blood and vessels) and underscore the importance of the
S1P pathway in vascular development.