ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (10): 1516-1521.doi: 10.11843/j.issn.0366-6964.2013.10.002

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Analysis of the Porcine Insulin Promoter and Verification of the Regulatory Genes Specific Expression in Pancreatic Tissue

HU Bing-jun, WANG Chao-qun, RUAN Jin-xue, XIN Lei-lei, MOU Yu-lian,YANG Shu-lin*, LI Kui   

  1. (Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193China)
  • Received:2013-03-29 Online:2013-10-23 Published:2013-10-23

Abstract:

The analysis of different Chinese local pig breeds insulin promoter sequence provided the basis for studying miniature pig β cell function and preparing diabetes model. In this study, porcine insulin promotersPIPfrom three pig breeds(Tongcheng pigs, Guangxi Bama Miniature pigs and Wuzhishan Miniature pigs) had been amplified by PCR. By the comparative analysis, the sequences of local pig breeds characteristics were got. To verify the validities and specificities of the gene expression regulatory of the sequence, pancreatic tumor cells and transgenic mice were used. There were no differences among the three local pig breeds in 1.5 kb insulin promoter sequences. Compared with the sequence from foreign pig breeds, there were only three nucleotide differences. Dual luciferase reporter gene detection system proved that the promoter could efficiently start downstream gene expression; In transgenic mice with CHOP and UCP2, two target genes expressions in pancreatic tissue were significantly higher than that in the liver, back muscles and kidneys, and pancreas tissue protein abundance significantly increased. The result of this study shows that the insulin promoter of Chinese local pig breeds can regulate target gene expression in the pancreatic tissue, which lays the foundation for producing transgenic pig model of regulating β cell function.

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