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- W1964719794 abstract "Objective To characterize glomerular and preglomerular vascular angiotensin II receptors during the acute phase of nonrenin-dependent one-kidney, one clip hypertension in rats, using the angiotensin II antagonists losartan and PD 123319, and to investigate their regulation after renin–angiotensin system blockade with either an angiotensin converting enzyme inhibitor, captopril, or an angiotensin II receptor antagonist, TCV-116. Materials and methods One-kidney, one clip hypertension was produced in male Sprague-Dawley rats by placing a silver clip (internal diameter 0.2 mm) on the left renal artery and removing the contralateral kidney. After 1, 2 or 4 weeks, the rats were killed, and their glomerular and preglomerular vascular membranes were purified. Competitive binding studies were performed using specific angiotensin II antagonists. Similarly, one-kidney, one clip hypertension was allowed to develop for 2 weeks before treatment with captopril or TCV-116 for 2 weeks. Results Competitive binding studies showed that only the angiotensin II type 1 (AT1) receptor was detected on both glomeruli and preglomerular vessels of all groups. The vascular AT1 receptor density was significantly higher in the 1 and 2 week one-kidney, one clip groups, but the glomerular receptor density was not different in these rats compared with age-matched uninephrectomized controls. The glomerular receptor density was significantly higher in captopril-treated rats and significantly lower in TCV-116–treated rats compared with untreated and control rats, but no significant changes were detected in any groups in vascular AT1 receptor density. Conclusions Angiotensin II receptors on preglomerular vessels and glomeruli are differentially regulated during the early phase of hypertension and after renin-angiotensin system blockade. Vascular angiotensin II receptors are upregulated in the early phase of hypertension whereas glomerular angiotensin II receptors are not. However, after renin-angiotensin system blockade, glomerular but not vascular angiotensin II receptors were differentially regulated according to the type of blockade." @default.
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- W1964719794 date "1999-02-01" @default.
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- W1964719794 title "Renal angiotensin II receptor regulation and reninangiotensin system inhibition in one-kidney, one clip hypertensive rats" @default.
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- W1964719794 doi "https://doi.org/10.1097/00004872-199917020-00013" @default.
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