On oxidation resistance and meat quality of broilers challenged with lipopolysaccharide

文献类型： 外文期刊

第一作者： Niu, Z. Y.

作者： Niu, Z. Y.;Min, Y. N.;Wang, J. J.;Wang, Z. P.;Wei, F. X.;Liu, F. Z.;Wei, F. X.

作者机构：

关键词： lipopolysaccharide;immune stress;oxidative damage;meat quality;broilers

期刊名称：JOURNAL OF APPLIED ANIMAL RESEARCH （ 影响因子：1.63； 五年影响因子：1.727 ）

ISSN： 0971-2119

年卷期： 2016 年 44 卷 1 期

页码：

收录情况： SCI

摘要： Effects of preslaughter immunological stress induced by lipopolysaccharide (LPS) on antioxidant performance and meat quality of broilers were investigated. Twenty-four broiler chickens (39 days old) with near-mean body weight (BW) were randomly divided into three following treatments: sham injection of saline (control), daily subcutaneous (s.c.) injection of LPS (3 mg/kg or 6 mg/kg of BW, respectively.) for three days. The results showed that average daily feed intake and daily gain of chickens were significantly decreased in the LPS treatment (P < 0.05). The F/G was significantly enhanced (P < 0.01). The LPS treatment had no significant influence on carcass performance (P > 0.05). The LPS treatment significantly decreased the pH at 24 h postmortem in breast muscle (P < 0.05) and significantly increased the water-holding capacity (WHC) of breast muscle (P < 0.01). It was the same as the change of yellowness (b*) at day 3 postmortem and lightness (L*) at day 6 postmortem in breast muscle (P < 0.05), but had no significant influence on shear force of breast muscle (P > 0.05). The pH at 45 min or 24 h postmortem of thigh muscle was significantly dropped in the LPS treatment (P < 0.01), however, the WHC and shear force of thigh muscle were not significantly different (P > 0.05). The yellowness (b*) significantly increased at day 3 postmortem of thigh muscle (P < 0.05). The plasma, breast muscle and thigh muscle MDA were significantly enhanced in the LPS treatment (P < 0.05). The total antioxidant capacity (T-AOC) level was significantly suppressed (P < 0.05); however, the plasma activity of glutathione peroxidase (GSH-Px) was slightly decreased (P > 0.05). The results of present study suggested that LPS-induced preslaughter immunological stress could increase body oxidative damage and decrease oxidation resistance, resulting in a decrease in growth performance and meat quality of broilers; also these adverse effects could be rested with the stress intensity.

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