Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effects of Chromium Picolinate Supplementation on Growth Hormone Secretion and Pituitary mRNA Expression in Finishing Pigs

  • Wang, M.Q. (Animal Science College of Zhejiang University, Key Laboratory of Molecular Animal Nutrition Ministry of Education) ;
  • He, Y.D. (Animal Science College of Zhejiang University, Key Laboratory of Molecular Animal Nutrition Ministry of Education) ;
  • Xu, Z.R. (Animal Science College of Zhejiang University, Key Laboratory of Molecular Animal Nutrition Ministry of Education) ;
  • Li, W.F. (Animal Science College of Zhejiang University, Key Laboratory of Molecular Animal Nutrition Ministry of Education)
  • Received : 2007.11.26
  • Accepted : 2008.03.17
  • Published : 2008.07.01
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Abstract

The purpose of the present study was to investigate the effects of chromium picolinate (CrPic) on growth hormone (GH) secretion and pituitary GH mRNA expression in finishing pigs. Forty eight crossbred pigs with an initial body weight of 65.57 kg (SD = 1.05) were blocked by body weight and randomly assigned to two treatments with three replicates. Each group was fed the diet supplemented with or without $200{\mu}g/kg$ chromium from CrPic for 40 days. The results showed that average daily gain of pigs was increased by 9.84% (p<0.05), and longissimus muscle area was increased by 17.29% (p<0.05) with the supplementation of CrPic. The results of GH dynamic secretion showed that supplemental CrPic increased the mean level and peak value of GH by 36.58% (p<0.05) and 26.60% (p<0.05), respectively, while there was no significant effect on basal value, peak amplitude and peak duration. Pituitary mRNA expression of GH was not significantly influenced by supplemental CrPic. These results indicated that CrPic increased pigs GH secretion without change of pituitary GH mRNA expression.

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References

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