| Effects of dietary copper source and concentration on carcass characteristics and lipid and cholesterol metabolism in growing and finishing steers. | |
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MedLine Citation:
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PMID: 10784198 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We conducted an experiment to determine the effects of dietary copper (Cu) source and level on carcass characteristics, longissimus muscle fatty acid composition, and serum and muscle cholesterol concentrations in steers. Sixty Angus and Angus x Hereford steers were stratified by weight and initial liver Cu concentration within a breed and randomly assigned to treatments. Treatments consisted of: 1) control (no supplemental Cu); 2) 20 mg Cu/kg DM from Cu sulfate (CuSO4); 3) 40 mg Cu/kg DM from CuSO4; 4) 20 mg Cu/kg DM from Cu citrate; 5) 20 mg Cu/kg DM from Cu proteinate; and 6) 20 mg Cu/kg DM from tribasic Cu chloride. A corn silage-soybean meal-based diet was fed for 56 d. Steers were then switched to a high-concentrate diet. Equal numbers (n = 5) of steers per treatment were slaughtered after receiving the finishing diets for either 101 or 121 d. Serum cholesterol was not affected by treatment during the growing phase but was decreased (P < .05) in steers supplemented with Cu by d 84 of the finishing period and remained lower (P < . 05) at subsequent sampling periods. Longissimus muscle cholesterol concentration tended to be reduced (P < .11) by Cu supplementation. Hot carcass weight and backfat were lower (P < .05) in animals receiving supplemental Cu. However, Cu-supplemented and control steers had similar marbling scores. Longissimus muscle polyunsaturated fatty acid concentrations (18:2 and 18:3) were increased (P < .07) and saturated fatty acid concentrations tended (P < . 11) to be reduced by Cu supplementation. These results indicate that as little as 20 mg of supplemental Cu/kg diet can reduce backfat and serum cholesterol and increase muscle polyunsaturated fatty acids in steers fed high-concentrate diets. |
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Authors:
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T E Engle; J W Spears; T A Armstrong; C L Wright; J Odle |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of animal science Volume: 78 ISSN: 0021-8812 ISO Abbreviation: J. Anim. Sci. Publication Date: 2000 Apr |
Date Detail:
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Created Date: 2000-06-06 Completed Date: 2000-06-06 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1053-9 Citation Subset: IM |
Affiliation:
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Department of Animal Science and Interdepartmental Nutrition Program, North Carolina State University, Raleigh 27695-7621, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed* Animals Cattle / growth & development*, metabolism Cholesterol / metabolism* Copper / pharmacology* Fatty Acids / metabolism Lipid Metabolism* Liver / metabolism Male Meat Muscle, Skeletal / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids; 57-88-5/Cholesterol; 7440-50-8/Copper |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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