Effect of manganese supplementation and source on carcass traits, meat quality, and lipid oxidation in broilers.

Full Abstract

An experiment was conducted using a total of 336 one-day-old, Arbor Acres commercial male broilers to investigate the effect of dietary Mn supplementation on carcass traits, meat quality, lipid oxidation, relative enzyme activities in abdominal fat and meat, and Mn-containing superoxide dismutase (MnSOD) mRNA level in meat. Broilers were randomly allotted by BW to 1 of 8 replicate cages (6 chicks per cage) for each of 7 treatments in a completely randomized design involving a 2 x 3 factorial + 1 arrangement of treatments. Dietary treatments included the corn-soybean meal-based diet (control) and the basal diet supplemented with 100 or 200 mg of Mn/kg as MnSO(4) x H(2)O, Mn AA A with a chelation strength of 26.3 formation quotient (8.34% Mn), or Mn AA B with a chelation strength of 45.3 formation quotient (6.48% Mn). Birds fed supplemental Mn had lower (P < 0.10) percentages of abdominal fat, lipoprotein lipase (LPL), and malate dehydrogenase activities and greater (P < 0.07) hormone-sensitive lipase activities in abdominal fat than birds fed a control diet. Birds fed supplemental Mn from Mn AA A or Mn AA B had lower (P < 0.05) LPL activities in abdominal fat than those fed supplemental MnSO(4) x H(2)O. Birds fed supplemental Mn had lower (P < 0.03) malondialdehyde content in leg muscle and greater (P < 0.02) MnSOD activities and MnSOD mRNA level in breast or leg muscle than those fed the control diet. Birds fed supplemental Mn from Mn AA A had a greater (P < 0.02) MnSOD mRNA level in leg muscle than those fed supplemental MnSO(4) x H(2)O. Results from this study indicated that organic Mn was more available than inorganic Mn for decreasing LPL activity in abdominal fat of broilers, and dietary Mn might reduce abdominal adipose deposition by decreasing LPL and malate dehydrogenase activities or increasing hormone-sensitive lipase activity in abdominal adipose tissue. The results also indicated that dietary Mn upregulated muscle MnSOD gene expression pretranslationally in association with increased MnSOD activity, which might explain the decrease of malondialdehyde content in leg muscle.

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Author information

Author/s: Lu, L (L); Luo, X G (XG); Ji, C (C); Liu, B (B); Yu, S X (SX);

Affiliation: Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, PR China.

Journal and publication information

Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't

Journal: Journal of animal science (J Anim Sci), published in United States. (Language: eng)

Reference: 2007-Mar; vol 85 (issue 3) : pp 812-22

Dates: Created 2007/02/13; Completed 2007/04/16; Revised 2008/11/21;

PMID: 17040939, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adipose Tissue - enzymology
Animal Feed - analysis
Animal Nutritional Physiological Phenomena
Animals
Body Composition - drug effects
Chickens - physiology
Diet - veterinary
Dietary Supplements

Dose-Response Relationship, Drug
Gene Expression Regulation
Lipid Peroxidation - drug effects
Male
Manganese - administration & dosage; pharmacology
Meat - standards
Muscle, Skeletal - drug effects; enzymology
Superoxide Dismutase - genetics; metabolism

Associated Chemicals: Manganese (7439-96-5) ; Superoxide Dismutase (EC 1.15.1.1)

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