Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (1): 201-212.doi: 10.11843/j.issn.0366-6964.2025.01.019

• Animal Genetics and Breeding • Previous Articles     Next Articles

Mechanism of Resveratrol Regulating Myofiber Type Transformation through PROX1/SIRT1 Signaling Pathway in Goats

WU Shaoqiang(), LIU Yufan, WEI Yirong, HUANG Yanna, JIANG Qinyang*()   

  1. Guangxi Key Laboratory of Livestock and Poultry Breeding and Disease Prevention and Control, College of Animal Science and Technology, Guangxi University, Nanning 530004, China
  • Received:2024-07-29 Online:2025-01-23 Published:2025-01-18
  • Contact: JIANG Qinyang E-mail:2418086469@qq.com;jiangqinyang@126.com

Abstract:

The aim of this study was to analyze the molecular mechanism of resveratrol (RES) regulating myofiber type transformation by mediating PROX1 gene in goat skeletal muscle. In vivo component, twelve 180-day-old depopulated Nubian goats ((28.25±0.26) kg) were randomly divided into two groups, with 6 replicates each, the PROX1 gene expression levels of in dorsal longest muscle tissues supplemented with 0 and 150 mg·kg-1 RES were detected by real-time fluorescence quantitative PCR (RT-qPCR) and Western blot. In vitro test, based on the previous research results, 20 μmol·L-1 RES was identified as the optimal concentration for cell culture. PROX1 interference fragments and a combination of interference fragments with 20 μmol·L-1 RES were transfected into goat skeletal muscle myoblasts. The expression levels of key genes in the CaN/NFAT pathway and the marker genes for the four muscle fiber types were measured at both mRNA and protein levels. Meanwhile, protein-protein docking technology was used to detect whether SIRT1 interacts with the PROX1 protein interact, and the regulatory relationship between SIRT1 and the CaN/NFAT pathway was verified by co-treatment of goat myoblasts with the SIRT1 inhibitor EX-527 and RES. The results showed that, compared with the control group, the expression of the SIRT1 gene and key genes in the CaN/NFAT pathway at the mRNA level in goat myoblasts treated with 150 mg·kg-1 RES was significantly upregulated (P < 0.001), the expression of MYH7 protein was significantly upregulated (P < 0.01), and the expression of MYH4 protein was significantly downregulated (P < 0.01). After PROX1 gene interference, the mRNA and protein expression levels of key genes in the CaN/NFAT pathway, MYH7 and MYH4 showed opposite trends, which were altered when the interference fragments and RES co-treated the myoblasts. The protein-protein docking results indicated that SIRT1 and PROX1 proteins could interact. After myoblasts treated with the SIRT1 inhibitor, the mRNA expression levels of key genes (NFATc1, TNNC1, TNNI1, MYOZ2, SLN) in the CaN/NFAT pathway were significantly downregulated compared to the control group (P < 0.01). Following RES intervention, the mRNA expression levels of TNNC1 and TNNI1 were significantly upregulated (P < 0.01). This study initially revealed the mechanism of RES regulating the transformation of muscle fiber types through SIRT1/PROX1/CaN/NFAT pathway, which provides a theoretical basis for the subsequent improvement of livestock and poultry meat quality.

Key words: resveratrol(RES), CaN/NFAT signaling pathway, goat myoblasts, myofiber transformation

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