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Asian-Australas J Anim Sci > Accepted
doi: https://doi.org/10.5713/ajas.16.0867    [Accepted]
Effects of proteinate complex zinc on growth performance, hepatic and splenic trace elements concentrations, antioxidative function and immune functions in weaned piglets
Yue She, Qiang Huang, Defa Li, Xiang-Shu Piao*
ALLTECH-MAFIC Research Alliance, China Agricultural University, Beijing 100193, China
* Corresponding Author: Xiang-Shu Piao ,Tel: +86-10-62733588, Fax: +86-10-62733688, Email: piaoxsh@cau.edu.cn
Received: November 10, 2016;  Revised: January 6, 2017.  Accepted: January 9, 2017.  Published online January 13, 2017.

ABSTRACT
Objective:
To assess the effects of proteinate complex zinc (PC-Zn) on growth performance, antioxidative function, trace element concentrations and immune function in weaned piglets.
Method:
Three hundred newly weaned barrows (Duroc × Landrace × Yorkshire), 28 days of age, were randomly allotted to 3 dietary groups of 5 replicate pens per group for 4 weeks of feeding. Experimental diets were: (1) zinc deficient diet (ZnD, 24 mg/kg Zn supplementation from ZnSO4), (2) inorganic Zn diet supplemented with 120 mg/kg of Zn from Zn sulfate (ZnSO4), and (3) organic Zn diet supplemented with 120 mg/kg of Zn from PC-Zn. The body weight of pigs were recorded at the beginning, at the middle and at the end of the experiment, and the amount of feed supplied each day was recorded. Five barrows from each dietary treatment group were selected to be anesthetized and euthanized at the end of the trial to determine the Zn, Cu, Fe, and Mn concentrations, the hepatic MT content, the levels of MDA, Mn, and Cu/Zn SOD, and GSH-Px in the spleen, the levels of IL-2, IL-4, IL-10, IFN-γ, CD3+, CD4+ and CD8+ T lymphocyte.
Results:
The accumulation of Zn in the spleen, levels of SOD, GSH-Px, IL-4, IL-10, the proportions of CD3+ and CD4+ T lymphocyte, and the ratio of CD4+ /CD8+ T lymphocyte were increased by organic Zn supplementation compared to ZnD, while the levels of MDA, IFN-γ, and proportion of CD8+ T lymphocyte were lowered.
Conclusion:
These findings indicate that Zn can improve the antioxidant potential and immune functions of weaned piglets.
Keywords: Proteinate Complex Zinc; Growth Performance; Trace Elements Concentrations; Atioxidative Function; Immune Functions; Weaned Piglets
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