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- W1993884950 abstract "In previous studies it has been shown that blood vessels of deoxycorticosterone acetate (DOCA) salt hypertensive rats present significantly higher immunoreactive ET-1 (ir-ET-1) content and increased ET-1 gene expression. DOCA-salt hypertensive rats respond to treatment with the combined ETA/ETB endothelin receptor antagonist bosentan with lowering of blood pressure. In the present study, we investigated the ir-ET-1 levels and the expression of the ET-1 gene in blood vessels of DOCA-salt hypertensive rats treated or not treated with bosentan. Blood pressure was significantly lower in bosentan-treated rats (185 +/- 6 mmHg; 1 mmHg = 133.3 Pa) compared with DOCA-salt hypertensive rats (203 +/- 4 mmHg; p < 0.01). Plasma ir-ET-1 concentration was slightly but significantly elevated (p < 0.01) in DOCA-salt hypertensive rats compared with uninephrectomized control rats, and was further increased (p < 0.01) in bosentan-treated rats. The tissue wet weight and ir-ET-1 content of segments of thoracic aorta were significantly increased (p < 0.01) in DOCA-salt hypertensive rats in comparison with control rats, but were similar in bosentan-treated DOCA-salt rats. The abundance of ET-1 mRNA measured by Northern blot analysis in thoracic aorta and the ir-ET-1 content were attenuated by bosentan treatment. Tissue wet weight and ir-ET-1 content in the mesenteric vascular bed were similar in bosentan-treated and -untreated DOCA-salt rats, and were significantly higher in both groups than in control rats (p < 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1993884950 date "1995-03-01" @default.
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- W1993884950 title "Endothelin-1 expression in blood vessels of DOCA-salt hypertensive rats treated with the combined ET<sub>A</sub>/ET<sub>B</sub> endothelin receptor antagonist bosentan" @default.
- W1993884950 doi "https://doi.org/10.1139/y95-050" @default.
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