China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (4): 1271-1279.doi: 10.16431/j.cnki.1671-7236.2022.04.008

• Physiological and Biochemical • Previous Articles     Next Articles

Effect of miR-495-3p on Proliferation and Differentiation of Goat Skeletal Muscle Cells

YANG Lili, ZHANG Qiongwen, ZHANG Yu, LIU Xiaoxiao, CHEN Ting, JIANG Mingsheng   

  1. College of Animal Science and Technology, Guangxi University, Nanning 530004, China
  • Received:2021-09-12 Online:2022-04-05 Published:2022-03-25

Abstract: 【Objective】 The experiment was conducted to study the effects of miR-495-3p on the proliferation and differentiation of goat skeletal muscle cells and its expression in different tissues,in order to provide a theoretical basis for exploring the regulatory mechanism of miRNA in muscle development.【Method】 Target genes of miR-495-3p were predicted by bioinformatics methods.The expression levels of miR-495-3p and its target genes in heart,liver,spleen,lung,kidney,longissimus dorsi muscle and leg muscle were detected by Real-time quantitative PCR.The overexpression (miR-495-3p mimic,miR-495-3p mimic NC) and inhibitor (miR-495-3p inhibitor,miR-495-3p inhibitor NC) of miR-495-3p were constructed,and when the confluence of goat skeletal muscle cells reached 60%-70%,they were transfected and induced to differentiate with the medium containing 2% horse serum,CCK-8 was used to detect cell proliferation activity,and Real-time quantitative PCR was used to detect the overexpression and interference efficiency,and the expression of proliferation and differentiation related genes paired box 7 (Pax7),Cyclin E,myogenin (MyoG) and myogenic factor 5 (Myf5).The wild-type and mutant vectors of miR-495-3p target gene were constructed and transfected into 293T cells,the double luciferase report was used to verify the binding of miR-495-3p and its target gene.【Result】 Bioinformatics prediction results showed that the target gene of miR-495-3p was alpha cardiocactin 1 (ACTC1),and there were extremely significant differences of miR-495-3p and ACTC1 in longissimus dorsi muscle at the age of 1 and 10 months goats (P<0.01).miR-495-3p and ACTC1 were expressed in heart,liver,spleen,lung,kidney,longissimus dorsi muscle and leg muscle,and the expression was higher in longissimus dorsi muscle.The results of cell transfection showed that miR-495-3p mimic significantly promoted the expression of miR-495-3p (P<0.01),and miR-495-3p inhibitor significantly inhibited the expression of miR-495-3p (P<0.01),indicating that miR-495-3p mimic and miR-495-3p inhibitor could be used in subsequent trials.Real-time quantitative PCR results showed that overexpression of miR-495-3p promoted the expression of skeletal muscle cell differentiation related marker genes MyoG and Myf5,while inhibition of miR-495-3p decreased the expression of MyoG and Myf5 genes.Overexpression and interference of miR-495-3p had no significant effect on the expression of Pax7,Cyclin E genes and cell proliferation activity of skeletal muscle cells (P>0.05).The results of double luciferase report showed that miR-495-3p had a targeting relationship with ACTC1 gene.【Conclusion】 miR-495-3p had no significant effect on the proliferation of goat skeletal muscle cells,but could promote the differentiation of goat skeletal muscle cells by targeting ACTC1 gene.

Key words: goat; miR-495-3p; skeletal muscle cells; differentiation

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