Short Communications

Effects of Astragalus Polysaccharide on Protein Reallocation of Broilers Exposed to Immune Stress

  • LIU Lei ,
  • SU Manchun ,
  • LEI Yaogeng ,
  • ZHAO Chao ,
  • WANG Weitao ,
  • YAO Junhu ,
  • GONG Yuesheng ,
  • YANG Xiaojun
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  • College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China

Received date: 2014-06-09

  Online published: 2014-12-05

Abstract

This study was conducted to investigate the effects of Astragalus polysaccharide (APS) on protein reallocation in broilers after challenge with E.coli (O55:B5) lipopolysaccharide (LPS). A total of 144 one-day-old Arbor Acres broilers were randomly divided into four groups (six replicates per group and six birds per replicate) in terms of a 2×2 factorial design. The main factors were immune stress (LPS or saline injection) and dietary APS (0 or 3 g/kg). A trial of protein deposition was performed from 21 to 35 days of age. The results showed that immune stress significantly reduced average daily feed intake (ADFI), average daily gain (ADG), protein deposition (PD) and protein deposition rate (PDR) of the left pectoralis (P<0.05). Meanwhile, the spleen index, spleen PD, spleen and bursa of fabricius PDRs were significantly increased by immune stress (P<0.05). Under immune stress, however, ADFI and ADG were increased by 16.30% and 18.34% respectively via dietary APS supplementation. The left pectoralis PD and PDR were increased by 30.36% and 12.34% respectively as well. The elevated spleen PD and PDR caused by immune stress were significantly decreased by dietary APS supplementation (P<0.05). In conclusion, dietary supplementation with 3 g/kg APS can inhibit protein redistribution from skeletal muscle to the immune system, and attenuate growth inhibition caused by immune stress.

Cite this article

LIU Lei , SU Manchun , LEI Yaogeng , ZHAO Chao , WANG Weitao , YAO Junhu , GONG Yuesheng , YANG Xiaojun . Effects of Astragalus Polysaccharide on Protein Reallocation of Broilers Exposed to Immune Stress[J]. Chinese Journal of Animal Nutrition, 2014 , 26(12) : 3799 -3805 . DOI: 10.3969/j.issn.1006-267x.2014.12.033

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