Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Gene expression and promoter methylation of porcine uncoupling protein 3 gene

  • Lin, Ruiyi (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Lin, Weimin (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Chen, Qiaohui (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Huo, Jianchao (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Hu, Yuping (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Ye, Junxiao (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Xu, Jingya (College of Animal Science, Fujian Agriculture and Forestry University) ;
  • Xiao, Tianfang (College of Animal Science, Fujian Agriculture and Forestry University)
  • Received : 2018.02.06
  • Accepted : 2018.06.27
  • Published : 2019.02.01
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Abstract

Objective: Uncoupling protein 3 gene (UCP3) is a candidate gene associated with the meat quality of pigs. The aim of this study was to explore the regulation mechanism of UCP3 expression and provide a theoretical basis for the research of the function of porcine UCP3 gene in meat quality. Methods: Bisulfite sequencing polymerase chain reaction (PCR) and quantitative real-time PCR (Q-PCR) were used to analyze the methylation of UCP3 5′-flanking region and UCP3 mRNA expression in the adipose tissue or skeletal muscle of three pig breeds at different ages (1, 90, 210-day-old Putian Black pig; 90-day-old Duroc; and 90-day-old Dupu). Results: Results showed that two cytosine-guanine dinucleotide (CpG) islands are present in the promoter region of porcine UCP3 gene. The second CpG island located in the core promoter region contained 9 CpG sites. The methylation level of CpG island 2 was lower in the adipose tissue and skeletal muscle of 90-day-old Putian Black pigs compared with 1-day-old and 210-day-old Putian Black pigs, and the difference also existed in the skeletal muscle among the three 90-day-old pig breeds. Furthermore, the obvious changing difference of UCP3 mRNA expression was observed in the skeletal muscle of different groups. However, the difference of methylation status and expression level of UCP3 gene was not significant in the adipose tissue. Conclusion: Our data indicate that UCP3 mRNA expression level was associated with the methylation status of UCP3 promoter in the skeletal muscle of pigs.

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References

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