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- W2085385955 abstract "The canine model of pacing-induced heart failure (HF) simulates human dilated cardiomyopathy and is characterized by severe hemodynamic perturbations. We have previously demonstrated increased plasma endothelin-1 (ET-1) and left ventricular (LV) tissue peptide levels in this model. However, the gene expression of ET-1 has not been studied. Accordingly, we compared preproET-1 mRNA in the lungs and LV in control normal dogs, dogs with severe HF after 3 weeks of rapid pacing (pHF), and pHF dogs chronically treated with an ETA antagonist, LU135252 (pHF-LU). PreproET-1 mRNA expression was determined by ribonuclease protection assay and quantified by densitometry. In paced dogs, mean pulmonary artery pressure (PA) and LV end-diastolic pressure (LVEDP) increased markedly from 16 +/- 4 and 8 +/- 3 mm Hg, respectively, at baseline to 40 +/- 11 and 34 +/- 7 mm Hg, respectively, at 3 weeks (both p < 0.001). Treatment with LU135252 attenuated the increase in PA and LVEDP by 30% and 19%, respectively (p < 0.05 for both). Compared to controls, preproET-1 mRNA expression in the LV and lungs was markedly increased in pHF. This was not changed in the LV but was reduced in the lungs by treatment with the ETA antagonist. Increased pulmonary and LV expression of preproET-1 suggests that ET-1 plays a role in mediating the pulmonary hypertension and LV dysfunction characteristic of this model." @default.
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- W2085385955 date "1998-01-01" @default.
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- W2085385955 title "Increased Cardiac and Pulmonary Endothelin-1 mRNA Expression in Canine Pacing-Induced Heart Failure" @default.
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- W2085385955 doi "https://doi.org/10.1097/00005344-199800001-00121" @default.
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