| Dietary Salt Exacerbates Isoproterenol-Induced Cardiomyopathy in Rats. | |
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MedLine Citation:
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PMID: 21878552 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Spontaneously hypertensive heart failure rats (SHHFs) take longer to develop compensated heart failure (HF) and congestive decompensation than common surgical models of HF. Isoproterenol (ISO) infusion can accelerate cardiomyopathy in young SHHFs, while dietary salt loading in hypertensive rats induces cardiac fibrosis, hypertrophy, and-in a minority-congestive HF. By combining ISO with dietary salt loading in young SHHFs, the authors sought a nonsurgical model that is more time- and resource-efficient than any of these factors alone. The authors hypothesized that salt loading would enhance ISO-accelerated cardiomyopathy, promoting fibrosis, hypertrophy, and biochemical characteristics of HF. SHHFs (lean male, 90d) were infused for 4 wk with ISO (2.5 mg/kg/day) or saline. After 2 wk of infusion, a 6-wk high-salt diet (4%, 6%, or 8% NaCl) was initiated. Eight percent salt increased heart weight, HF markers (plasma B-type natriuretic peptide, IL-6), lung lymphocytes, and indicators of lung injury and edema (albumin and protein) relative to control diet, while increasing urine pro-atrial natriuretic peptide relative to ISO-only. High salt also exacerbated ISO-cardiomyopathy and fibrosis. Thus, combining ISO infusion with dietary salt loading in SHHFs holds promise for a new rat HF model that may help researchers to elucidate HF mechanisms and unearth effective treatments. |
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Authors:
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Alex P Carll; Najwa Haykal-Coates; Darrell W Winsett; Mehdi S Hazari; Abraham Nyska; Judy H Richards; Monte S Willis; Daniel L Costa; Aimen K Farraj |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-30 |
Journal Detail:
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Title: Toxicologic pathology Volume: - ISSN: 1533-1601 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7905907 Medline TA: Toxicol Pathol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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