Premium
THE RENIN‐ANGIOTENSIN SYSTEM AND THE DEVELOPMENT OF THE KIDNEY AND ADRENAL IN SHEEP
Author(s) -
Wintour E Marelyn,
Alcorn Daine,
Albiston Anthony,
Boon Wah Chin,
Butkus Aldona,
Earnest Linda,
Moritz Karen,
Shandley Lynne
Publication year - 1998
Publication title -
clinical and experimental pharmacology and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 103
eISSN - 1440-1681
pISSN - 0305-1870
DOI - 10.1111/j.1440-1681.1998.tb02309.x
Subject(s) - renin–angiotensin system , kidney , medicine , endocrinology , blood pressure
SUMMARY 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 AT 1 and AT 2 . 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 AT 1 and AT 2 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.