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- W2315254400 abstract "Exposure to hypoxia is associated with increased pulmonary artery pressure and plasma endothelin (ET-1) levels and with selective enhancement of ET-1 peptide and messenger RNA (mRNA) and endothelin-A (ET-A) receptor mRNA in rat lung. Our study tested the hypothesis that A-127722, an orally active antagonist of the ET-A receptor, can prevent hypoxia-induced pulmonary hypertension and vascular remodeling in the rat. Pretreatment with A-127722 (3, 10, and 30 mg/kg/day in drinking water for 2 days) caused dose-dependent inhibition of the pulmonary vasoconstrictor response to short-term hypoxia (10% O2, 90 min). Long-term A-127722 treatment (10 mg/kg/day in drinking water for 2 weeks) instituted 48 h before hypoxic exposure attenuated the subsequent development of pulmonary hypertension, the associated right atrial hypertrophy, and pulmonary vascular remodeling. Institution of A-127722 treatment (10 mg/kg/day in drinking water for 4 weeks) after 2 weeks of hypoxia retarded the progression of established hypoxia-induced pulmonary hypertension and right atrial hypertrophy and reversed the pulmonary vascular remodeling despite continuing hypoxic exposure. These findings support the hypothesis that endogenous ET-1 plays a major role in hypoxic pulmonary vasoconstriction/hypertension, right heart hypertrophy, and pulmonary vascular remodeling and suggest that ET-A receptor blockers may be useful in the treatment and prevention of hypoxic pulmonary hypertension in humans." @default.
- W2315254400 created "2016-06-24" @default.
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- W2315254400 date "1997-06-01" @default.
- W2315254400 modified "2023-09-24" @default.
- W2315254400 title "The Orally Active Nonpeptide Endothelin A-Receptor Antagonist A-127722 Prevents and Reverses Hypoxia-Induced Pulmonary Hypertension and Pulmonary Vascular Remodeling in Sprague-Dawley Rats" @default.
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- W2315254400 doi "https://doi.org/10.1097/00005344-199706000-00003" @default.
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