Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (6): 1219-1228.doi: 10.11843/j.issn.0366-6964.2020.006

• ANIMAL GENETICS AND BREEDING • Previous Articles     Next Articles

miR-106b-5p Regulates the Differentiation of Goat Intramuscular Preadipocytes by Targeting KLF4

DU Yu1,2, ZHAO Yue1, LIN Yaqiu1,2, ZHU Jiangjiang2, WANG Yong1*, MA Jieqiong1,2, XIE Guangjie2   

  1. 1. Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University, Chengdu 610041, China;
    2. College of Life Science and Technology, Southwest Minzu University, Chengdu 610041, China
  • Received:2019-11-07 Online:2020-06-25 Published:2020-06-23

Abstract: This study aimed to explore the effect of miR-106b-5p on the differentiation of goat intramuscular preadipocytes, and to confirm whether miR-106b-5p played its roles via targeting KLF4. The quantitative real-time PCR (qRT-PCR) was used to detect the expression pattern of miR-106b-5p during the differentiation of goat intramuscular preadipocytes. The miR-106b-5p mimic and miR-106b-5p inhibitor were transfected into goat intramuscular preadipocytes cultured in vitro by liposome transfection. The effect of miR-106b-5p on lipid droplet accumulation was verified using the Oil Red O Staining. The expression levels of predicted target gene KLF4 targeting miR-106b-5p and adipogenic marker genes were detected using qRT-PCR. The target relationship between miR-106b-5p and KLF4 was detected by dual luciferase reporter system. The result of qRT-PCR showed that the highest expression level of miR-106b-5p was at day 3 of induced differentiation of goat intramuscular preadipocytes. The Oil Red O staining result showed that lipid droplet accumulation was decreased after treated by miR-106b-5p inhibitor, however, it had an opposite result after treated by miR-106b-5p mimic in goat intramuscular adipocytes. The expression level of PPARγ was significantly decreased (P<0.05) and the expression level of KLF4 was extremely significantly increased (P<0.01) in the miR-106b-5p inhibitor treatment. The expression levels of LPL and PPARγ were extremely significantly increased (P<0.01) in the miR-106b-5p mimic treatment. The luciferase activity assay result showed that luciferase activity of KLF4 was significantly inhibited in the miR-106b-5p mimic treatment. miR-106b-5p promotes the differentiation of goat intramuscular preadipocytes via targeting and negatively regulating the expression of KLF4.

Key words: goat, miR-106b-5p, KLF4, adipocyte, luciferase activity assay

CLC Number: