The Angiotensin Type 1 Receptor Antagonist, Eprosartan, Attenuates the Progression of Renal Disease in Spontaneously Hypertensive Stroke-Prone Rats with Accelerated Hypertension
The effects of the angiotensin type 1 (AT 1 ) receptor antagonist, eprosartan, were studied in a model of severe, chronic hypertension. Treatment of male spontaneously hypertensive stroke prone rats (SHR-SP) fed a high-fat, high-salt diet with eprosartan (60 mg/kg/day i.p.) for 12 weeks resulted in...
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Published in | The Journal of pharmacology and experimental therapeutics Vol. 301; no. 1; pp. 21 - 28 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Society for Pharmacology and Experimental Therapeutics
01.04.2002
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Subjects | |
Online Access | Get full text |
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Summary: | The effects of the angiotensin type 1 (AT 1 ) receptor antagonist, eprosartan, were studied in a model of severe, chronic hypertension. Treatment of male spontaneously
hypertensive stroke prone rats (SHR-SP) fed a high-fat, high-salt diet with eprosartan (60 mg/kg/day i.p.) for 12 weeks resulted
in a lowering of blood pressure (250 ± 9 versus 284 ± 8 mm Hg), renal expression of transforming growth factor-β mRNA (1.5
± 0.2 versus 5.4 ± 1.4) and the matrix components: plasminogen activator inhibitor-1 (5.2 ± 1.4 versus 31.4 ± 10.7), fibronectin
(2.2 ± 0.6 versus 8.2 ± 2.2), collagen I-α1 (5.6 ± 2.0 versus 23.8 ± 7.3), and collagen III (2.7 ± 0.9 versus 7.6 ± 2.1).
Data were corrected for rpL32 mRNA expression and expressed relative to Wistar Kyoto (WKY) rats [=1.0]. Expression of fibronectin
protein was also lowered by eprosartan (0.8 ± 0.1 versus 1.9 ± 0.5), relative to WKY rats. Eprosartan provided significant
renoprotection to SHR-SP rats as measured by decreased proteinuria (22 ± 2 versus 127 ± 13 mg/day) and histological evidence
of active renal damage (5 ± 2 versus 195 ± 6) and renal fibrosis (5.9 ± 0.7 versus 16.4 ± 1.9) in vehicle- versus eprosartan-treated
rats, respectively. Our results demonstrated that AT 1 receptor blockade with eprosartan can reduce blood pressure and preserve renal structure and function in this model of severe,
chronic hypertension. These effects were accompanied by a decreased renal expression of transforming growth factor-β1, plasminogen
activator inhibitor-1, and several other extracellular matrix proteins compared with vehicle-treated SHR-SP. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0022-3565 1521-0103 |
DOI: | 10.1124/jpet.301.1.21 |