Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (3): 1147-1158.doi: 10.11843/j.issn.0366-6964.2025.03.016

• Animal Genetics and Breeding • Previous Articles     Next Articles

Identification and Transcriptional Regulation Analysis of the Core Promoter of Porcine CYP3A29 Gene

WANG Hong1,2(), ZHAO Weimin3, CHENG Jinhua3, LI Huixia2,*(), FANG Xiaomin1,*()   

  1. 1. Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
    2. College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
    3. Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
  • Received:2024-10-11 Online:2025-03-23 Published:2025-04-02
  • Contact: LI Huixia, FANG Xiaomin E-mail:2749363442@qq.com;lihuixia@njau.edu.cn;fxmw2000@163.com

Abstract:

The aim of this study was to identify the core promoter activity of porcine CYP3A29 gene and the corresponding transcriptional regulatory factors, and to analyze the regulation of CYP3A29 promoter activity by transcription factors. Three healthy Yorkshire sows (30 kg) were used as experimental materials to detect the expression and distribution of CYP3A29 gene in pig tissues (heart, liver, spleen, lung, kidney, small intestine and muscle) by PCR and Western blot. The dual luciferase reporter vectors of CYP3A29 gene promoter with different fragment lengths were constructed by PCR amplification and were transfected into 293T and AML12 cell lines. The core promoter region of CYP3A29 gene was determined by detecting luciferase activity. The animal TFDB website was used to analyze the possible transcription factor binding sites in the core promoter region of CYP3A29 gene and segmented deletion dual-luciferase reporter vectors of the core promoter region were constructed. The binding site region of the transcription factor was further determined by detecting the luciferase activity. The dual-luciferase reporter vectors with transcription factor binding mutation sites and shRNA vector for transcription factor were constructed, which were used to explore the role of transcription factors in the regulation of the CYP3A29 core promoter. The results showed that the expression of CYP3A29 gene was the highest in pig liver. The -528- +62 bp region of CYP3A29 promoter had the highest activity among the 4 different regions (-2 026-+62 bp, -1 526-+62 bp, -1 026- +62 bp and -528- +62 bp), and was considered to be the core promoter region. The -528- -448 bp region of CYP3A29 promoter negatively regulated the core promoter activity and contained a potential transcription factor binding site of RUNX1. The mutant RUNX1 binding site significantly reduced the luciferase activity of the -528- +62 bp promoter, while the interference of the RUNX1 gene significantly increased the luciferase activity of the -528- +62 bp wild-type promoter, but had no significant effect on the luciferase activity of the -528- +62 bp mutant promoter, indicating that RUNX1 negatively regulated the core promoter activity of the CYP3A29 gene. The results of this study laid a foundation for further analysis of the transcriptional regulation mechanism of CYP3A29 gene.

Key words: porcine, CYP3A29, core promoter, RUNX1, transcription regulation

CLC Number: