ISSN:
1440-1681
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
1. The earliest form of the kidney, the pronephros, does not really occur in the ovine embryo; instead, a giant glomerulus forms at the anterior end of the mesonephros.2. In the sheep, the mesonephros is present from 11-38% of total gestation (150 days) and produces a dilute urine, as well as expressing the genes for erythropoietin, renin, angioten-sinogen, angiotensin-converting enzyme and the angiotensin II (AngII) receptors AT1 and AT2.3. The ovine metanephros begins to develop at 18% of gestation and nephrogenesis is complete several weeks before birth. AH components of the renin-angiotensin system (RAS) are expressed from at least 27% of gestation.4. Both AT1 and AT2 receptors are expressed by the adrenocortical cells early in gestation but, at mid-gestation, exogenous AngII does not stimulate aldosterone secretion in vivo.5. Preliminary results suggest that Angll has important roles in renal development in the ovine foetus but the role(s), if any, in adrenal development, remains to be investigated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1440-1681.1998.tb02309.x
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