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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Renal+Physiol
2015 ; 309
(6
): F531-9
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gab.com Text
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English Wikipedia
Renin expression in developing zebrafish is associated with angiogenesis and
requires the Notch pathway and endothelium
#MMPMID26202224
Rider SA
; Mullins LJ
; Verdon RF
; MacRae CA
; Mullins JJ
Am J Physiol Renal Physiol
2015[Sep]; 309
(6
): F531-9
PMID26202224
show ga
Although renin is a critical regulatory enzyme of the cardiovascular system, its
roles in organogenesis and the establishment of cardiovascular homeostasis remain
unclear. Mammalian renin-expressing cells are widespread in embryonic kidneys but
are highly restricted, specialized endocrine cells in adults. With a functional
pronephros, embryonic zebrafish are ideal for delineating the developmental
functions of renin-expressing cells and the mechanisms governing renin
transcription. Larval zebrafish renin expression originates in the mural cells of
the juxtaglomerular anterior mesenteric artery and subsequently at extrarenal
sites. The role of renin was determined by assessing responses to
renin-angiotensin system blockade, salinity variation, and renal perfusion
ablation. Renin expression did not respond to renal flow ablation but was
modulated by inhibition of angiotensin-converting enzyme and altered salinity.
Our data in larval fish are consistent with conservation of renin's physiological
functions. Using transgenic renin reporter fish, with mindbomb and cloche
mutants, we show that Notch signaling and the endothelium are essential for
developmental renin expression. After inhibition of angiogenesis,
renin-expressing cells precede angiogenic sprouts. Arising from separate
lineages, but relying on mutual interplay with endothelial cells,
renin-expressing cells are among the earliest mural cells observed in larval
fish, performing both endocrine and paracrine functions.