title: Lipid stability, antioxidant potential and fatty acid composition of broilers breast meat as influenced by quercetin in combination with α-tocopherol enriched diets.
abstract: BACKGROUND
  Dietary supplementation of antioxidants is a vital route to affect the oxidative stability and fatty acid profile of broiler meat. The supplementation of feed with antioxidants decreases degradation of lipids in muscles thereby enhances meat stability.
  
  
  METHODS
  The present study was carried out to investigate the influence of dietary quercetin in combination with α-tocopherol on growth performance, antioxidant potential, lipid stability and fatty acid composition in breast meat of birds. Accordingly, one day old 300 Hubbard strain male broiler birds were given three levels of quercetin @100, 200 and 300 mg/kg feed in combination with α-tocopherol @150, 225 and 300 mg/kg feed. The resultant meat was subjected to antioxidant assay, lipid stability, quantification of antioxidants followed by fatty acid profile of broiler breast meat.
  
  
  RESULTS
  The results explicated that feed treatments imparted momentous effect on gain in weight, and feed conversion efficiency however, intake of feed in birds affected non-momentously. The highest weight gain recorded in T9 as 2374.67 & 2388 g/bird followed by T8 & T6 2350 & 2353.33 and 2293.33 & 2307 g/bird, respectively whilst the lowest in T0 as 1992.67 & 1999 g/bird during the experimental year 2013 and 2014. The results regarding antioxidant potential revealed that among treatments, T9 exhibited highest values for total phenolic contents (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) & ferric reducing antioxidant power assay (FRAP) i.e. 158.70 ± 0.84 mg GAE/100 g, 82.40 ± 0.93% and 682 ± 2.11 μmol/Fe(+2/)g, respectively as compared to T0 104.27 ± 1.64 mg GAE/100 g, 54.71 ± 0.64% and 542.67 ± 1.74 μmol/Fe(+2) /g of meat, correspondingly. The TBARS assay indicated that malondialdehydes production in meat increased during storage however, antioxidants deposition varied significantly among treatments. Fatty acid compositional analysis revealed that addition of quercetin with α-tocopherol in the bird's diet decreased the fatty acid generation particularly saturated fatty acids.
  
  
  CONCLUSIONS
  Conclusively, dietary supplementation of quercetin along with α-tocopherol improves growth performance, antioxidant capacity, stability of lipids and fatty acid composition in breast meat of birds.
authors.affiliation: National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan. ftsohaib@yahoo.com.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Sohaib
authors.affiliation: National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan. drmsbutt@yahoo.com.
authors.forename: Masood Sadiq
authors.initials: MS
authors.lastname: Butt
authors.affiliation: National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan. asim-shabbir@live.com.
authors.forename: Muhammad Asim
authors.initials: MA
authors.lastname: Shabbir
authors.affiliation: Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan. mshahiduaf@yahoo.com.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Shahid
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000032:analysis*; D001713:Biphenyl Compounds / Q000737:chemistry; D002645:Chickens; D004032:Diet; D005227:Fatty Acids / Q000032:analysis*; D005260:Female; D005290:Ferric Compounds / Q000737:chemistry; D016166:Free Radical Scavengers / Q000494:pharmacology; D008460:Meat / Q000032:analysis*; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry; D011794:Quercetin / Q000032:analysis / Q000494:pharmacology*; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis; D015430:Weight Gain / Q000187:drug effects; D024502:alpha-Tocopherol / Q000032:analysis / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D005227:Fatty Acids; D005290:Ferric Compounds; D016166:Free Radical Scavengers; D010851:Picrates; D017392:Thiobarbituric Acid Reactive Substances; D011794:Quercetin; C004931:1,1-diphenyl-2-picrylhydrazyl; D024502:alpha-Tocopherol