ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (8): 1567-1575.doi: 10.11843/j.issn.0366-6964.2019.08.005

• ANIMAL GENETICS AND BREEDING • Previous Articles     Next Articles

Study on Interaction between MSTN Promoter and MEF2C Transcription Factor in Cattle

YANG Tao1,2,3, XU Houqiang1,2,3,4*, CHEN Wei1,2,4, ZHOU Di1,2,4, WANG Yuanyuan1,2,3, ZHU Xiaofeng1,2,3   

  1. 1. Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region of Ministry of Education, Guizhou University, Guiyang 550025, China;
    2. Key Laboratory of Animal Genetics, Breeding and Reproduction in Guizhou, Guizhou University, Guiyang 550025, China;
    3. College of Animal Science, Guizhou University, Guiyang 550025, China;
    4. College of Life Science, Guizhou University, Guiyang 550025, China
  • Received:2019-01-15 Online:2019-08-23 Published:2019-08-23

Abstract: The aim of this study was to explore the regulation mechanism of MSTN on muscle growth and development by analysis of the interaction regulation between the MSTN promoter and MEF2C in cattle. Firstly, the 2 267 bp upstream promoter region of MSTN and 1 425 bp coding region of MEF2C were amplified by PCR. Secondly, pGL3-Basic-MSTN and pcDNA3.1(+)-MEF2C dual luciferase reporter vectors were constructed and co-transfected into C2C12 myoblasts by liposome transfection method. The dual luciferase activity were measured after 24 hours. Finally, the core fragment with high activity of MSTN promoter was amplified by PCR. The recombinant expression vector pEGFP-N3-MSTN-P1-MEF2C which replaced (CMV) area with MSTN-P1 fragment was reconstructed, and it was transiently transfected into C2C12 myoblasts and rat mandibular gland epithelial cells, respectively, the expression of green fluorescent protein in cells was observed after 24 hours. Total RNA was extracted from cells after 48 hours. The expression levels of MEF2C in different cells were detected by qRT-PCR.The results showed that the activity of MSTN promoter was enhanced significantly by co-transfected of pcDNA3.1(+)-MEF2C(P<0.05), and it was enhanced extremely significantly compared with pGL3-Basic in C2C12 myoblasts(P<0.01); MSTN-P1 promoter core fragment could drive the expression of MEF2C, and the mRNA expression levels were extremely significantly up-regulated(P<0.01) in C2C12 myoblasts, and significantly up-regulated(P<0.05) in rat mandibular gland epithelial cells. The results indicated that both MSTN promoter and MEF2C could be involved in the regulation of growth and differentiation of muscle at the transcriptional level.

CLC Number: