| Aortic pressure, substrate utilization and protein synthesis. | |
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MedLine Citation:
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PMID: 6241889 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An increase in aortic pressure from 60 to 120 mmHg in Langendorff perfused hearts increased oxygen consumption, glucose utilization, pyruvate oxidation and protein synthesis. These changes were not prevented by insertion of a ventricular drain that prevented intraventricular pressure development. Arrest of the heart with tetrodotoxin markedly reduced oxygen consumption; under these conditions an elevation of aortic pressure did not increase oxygen consumption. Elevation of aortic pressure in arrested-drained preparations supplied either glucose or pyruvate as oxidizable substrate increased protein synthesis to a comparable extent. Energy availability, as assessed by measurements of the creatine-P/creatine ratio, increased as aortic pressure was raised in hearts provided glucose, but not pyruvate, suggesting that greater energy availability was not the factor linking higher aortic pressure to faster rates of synthesis. These results focus attention on stretch of the ventricular wall, as the mechanical factor responsible for the effects of aortic pressure on several metabolic activities of the heart. |
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Authors:
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H E Morgan; Y Kira; E E Gordon |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: European heart journal Volume: 5 Suppl F ISSN: 0195-668X ISO Abbreviation: Eur. Heart J. Publication Date: 1984 Dec |
Date Detail:
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Created Date: 1985-06-19 Completed Date: 1985-06-19 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8006263 Medline TA: Eur Heart J Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 141-6 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Aorta / physiology* Blood Pressure* Cardiomegaly / etiology, metabolism Energy Metabolism Glucose / metabolism* Heart Heart Arrest, Induced Male Myocardial Contraction Myocardium / metabolism* Oxidation-Reduction Oxygen Consumption Perfusion Protein Biosynthesis* Pyruvates / metabolism* Pyruvic Acid Rats Rats, Inbred Strains Stress, Mechanical |
| Grant Support | |
ID/Acronym/Agency:
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HL-07223/HL/NHLBI NIH HHS; HL-20388/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Pyruvates; 127-17-3/Pyruvic Acid; 50-99-7/Glucose |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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