title: Effect of supplementation of two sources and two levels of copper on lipid metabolism in Nellore beef cattle.
abstract: This study was conducted with 35 Nellore beef cattle to determine the effect of supplementation of two levels and two copper sources (organic and inorganic) on metabolism of lipids and cholesterol of meat. The five treatments used were:
  
  
  METHODS
  without copper supplementation, I10 or I40: 10 or 40 mg/kg DM (as Cu sulfate), O10 or O40: 10 or 40 mg/kg DM (as Cu proteinate). In general, the copper supplementation changed the fatty acid profile of meat (p<0.05), with a higher proportion of unsaturated fatty acids and reduction of saturated fatty acids. There was no effect of supplementation on blood cholesterol and triglycerides, however; in general, there was a reduction in cholesterol concentration in the L. dorsi (p<0.05) compared to the control treatment through the reduction (p<0.05) in the concentrations of GSH and GSH/GSSG ratio. The Cu supplementation did have an influence on metabolism of lipids. The production of healthier meat is beneficial to public health by reducing the risk of cardiovascular disease.
authors.affiliation: College of Animal Science and Food Engineering, FZEA, University of São Paulo, USP, Av Duque de Caxias Norte 225, CEP 13635-900, Pirassununga, SP, Brazil. lisiabc@yahoo.com.br
authors.forename: Lisia Bertonha
authors.initials: LB
authors.lastname: Correa
authors.forename: Marcus Antonio
authors.initials: MA
authors.lastname: Zanetti
authors.forename: Gustavo Ribeiro
authors.initials: GR
authors.lastname: Del Claro
authors.forename: Mariza Pires
authors.initials: MP
authors.lastname: de Melo
authors.forename: Alessandra Fernandes
authors.initials: AF
authors.lastname: Rosa
authors.forename: Arlindo
authors.initials: A
authors.lastname: Saran Netto
mesh_terms: D000818:Animals; D002417:Cattle; D002791:Cholesterol, Dietary / Q000378:metabolism*; D003300:Copper / Q000494:pharmacology*; D004041:Dietary Fats / Q000378:metabolism*; D019587:Dietary Supplements; D005227:Fatty Acids / Q000378:metabolism*; D005978:Glutathione / Q000378:metabolism; D050356:Lipid Metabolism / Q000187:drug effects*; D008460:Meat / Q000032:analysis*; D018482:Muscle, Skeletal / Q000378:metabolism; D014131:Trace Elements / Q000494:pharmacology
chemical_list: D002791:Cholesterol, Dietary; D004041:Dietary Fats; D005227:Fatty Acids; D014131:Trace Elements; D003300:Copper; D005978:Glutathione