China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (9): 3292-3300.doi: 10.16431/j.cnki.1671-7236.2022.09.003

• Biotechnology • Previous Articles     Next Articles

Effects of Interference lnc721 on Proliferation and Differentiation of Bovine Skeletal Muscle Satellite Cells

TAN Haoyun, LIU Qian, HU Debao, ZHANG Linlin, LI Xin, DING Xiangbin, GUO Hong, GUO Yiwen   

  1. Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry, School of Animal Science and Veterinary Medicine, Tianjin Agricultural University, Tianjin 300384, China
  • Received:2022-01-12 Online:2022-09-05 Published:2022-08-24

Abstract: 【Objective】 This experiment was aimed to explore the long non-coding RNA (lncRNA) that played a regulatory role in bovine skeletal muscle development, and study its effect on the expression of bovine skeletal muscle satellite cells in proliferation and differentiation, so as to provide reference for the study of bovine muscle development related mechanisms.【Method】 A lncRNA obtained by high-throughput sequencing in the previous test was named lnc721. The biological information of lnc721 was analyzed using NCBI database, the coding ability and subcellular localization of lnc721 were determined by CPC website and nucleo-cytoplasmic separation experiment, respectively.The designed and synthesized lnc721 siRNA was transfected into bovine skeletal muscle satellite cells, and the bovine skeletal muscle satellite cells were cultured and differentiated through a mature in vitro myoblast induced differentiation model.The expression changes of lnc721 in different stages of cell development were analyzed in detail by EdU experiment, Real-time quantitative PCR and Western blotting, respectively.【Result】 lnc721 was located on chromosome 18 of the whole bovine genome, and its protein coding capacity was-1.33129, which was mainly located in cytoplasm.After interference with lnc721 expression, the EdU positive cellular rates was extremely significantly increased, and the mRNA expression of cell proliferation marker genes Pax7 and Ki-67 were extremely significantly up-regulated (P<0.01).Western blotting results further proved that interference with lnc721 extremely significantly promoted the expression of Pax7 protein (P<0.01).The mRNA and protein expression of the cell differentiation marker MyHC gene were extremely significantly down-regulated after interfering with the expression of lnc721 at the cell differentiation stage (P<0.01).【Conclusion】 Interference with lnc721 could promote the proliferation of bovine skeletal muscle satellite cells and inhibit the process of myoblast differentiation.

Key words: lnc721; cattle; skeletal muscle satellite cells; proliferation; differentiation

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