2. Academic Validation
  3. Estrogen-mediated oar-miR-485-5p targets PPP1R13B to regulate myoblast proliferation in sheep

Estrogen-mediated oar-miR-485-5p targets PPP1R13B to regulate myoblast proliferation in sheep

  • Int J Biol Macromol. 2023 Mar 10;236:123987. doi: 10.1016/j.ijbiomac.2023.123987.
Siqi Liu 1,  Ziyi Liu 2,  Peng Wang 2,  Wentao Li 2,  Shengguo Zhao 3,  Yufang Liu 4,  Mingxing Chu 5
Affiliations

Affiliations

  • 1 Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
  • 2 Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
  • 3 College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
  • 4 Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China. Electronic address: aigaiy@126.com.
  • 5 Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China. Electronic address: mxchu@263.net.
PMID: 36906210 DOI: 10.1016/j.ijbiomac.2023.123987
Abstract

Ovaries are important endocrine organs in female Animals that secrete various steroid Hormones, which are involved in multiple physiological functions. Estrogen, one of the Hormones secreted by ovaries, is essential for the overall maintenance of muscle growth and development. However, the molecular mechanisms that affect muscle growth and development in sheep following ovariectomy remain unclear. In this study, we identified 1662 differentially expressed mRNAs (DEGs) and 40 differentially expressed miRNAs (DEMs) in sheep that underwent ovariectomy compared with those that underwent sham surgery. A total of 178 DEG-DEM pairs were negatively correlated. GO and KEGG analysis showed that PPP1R13B was involved in the PI3K-Akt signaling pathway, which was essential for muscle development. Using in vitro experiments, we examined the effect of PPP1R13B on myoblast proliferation and found that overexpression or inhibition of PPP1R13B increased or decreased the expression of myoblast proliferation markers, respectively. PPP1R13B was identified as a functional downstream target of miR-485-5p. Our results suggested that miR-485-5p promoted myoblast proliferation by regulating proliferation factors in myoblasts by targeting PPP1R13B. Notably, exogenous estradiol supplementation to myoblasts regulated the expression of oar-miR-485-5p and PPP1R13B and promoted myoblast proliferation. These results provided new insights into the molecular mechanism by which ovaries influence muscle growth and development in sheep.

Keywords

Longissimus dorsi; Oar-miR-485-5p; Ovariectomy; PPP1R13B; Sheep.

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