Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effect of Glucagon-like Peptide 2 on Tight Junction in Jejunal Epithelium of Weaned Pigs though MAPK Signaling Pathway

  • Yu, Changsong (Animal Nutrition Institute, Sichuan Agricultural University) ;
  • Jia, Gang (Animal Nutrition Institute, Sichuan Agricultural University) ;
  • Jiang, Yi (Animal Nutrition Institute, Sichuan Agricultural University) ;
  • Deng, Qiuhong (Animal Nutrition Institute, Sichuan Agricultural University) ;
  • Chen, Zhengli (College of Animal Medicine, Sichuan Agriculture University) ;
  • Xu, Zhiwen (College of Animal Medicine, Sichuan Agriculture University) ;
  • Chen, Xiaolin (Animal Nutrition Institute, Sichuan Agricultural University) ;
  • Wang, Kangning (Animal Nutrition Institute, Sichuan Agricultural University)
  • Received : 2013.09.01
  • Accepted : 2014.01.05
  • Published : 2014.05.01
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Abstract

The glucagon-like peptide 2 (GLP-2) that is expressed in intestine epithelial cells of mammals, is important for intestinal barrier function and regulation of tight junction (TJ) proteins. However, there is little known about the intracellular mechanisms of GLP-2 in the regulation of TJ proteins in piglets' intestinal epithelial cells. The purpose of this study is to test the hypothesis that GLP-2 regulates the expressions of TJ proteins in the mitogen-activated protein kinase (MAPK) signaling pathway in piglets' intestinal epithelial cells. The jejunal tissues were cultured in a Dulbecco's modified Eagle's medium/high glucose medium containing supplemental 0 to 100 nmol/L GLP-2. At 72 h after the treatment with the appropriate concentrations of GLP-2, the mRNA and protein expressions of zonula occludens-1 (ZO-1), occludin and claudin-1 were increased (p<0.05). U0126, an MAPK kinase inhibitor, prevented the mRNA and protein expressions of ZO-1, occludin, claudin-1 increase induced by GLP-2 (p<0.05). In conclusion, these results indicated that GLP-2 could improve the expression of TJ proteins in weaned pigs' jejunal epithelium, and the underlying mechanism may due to the MAPK signaling pathway.

Keywords

References

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