Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Overexpression of cholinergic receptor nicotinic gamma subunit inhibits proliferation and differentiation of bovine preadipocytes

  • Jiawei, Du (College of Animal Science and Technology, Northwest A&F University) ;
  • Hui, Zhao (College of Animal Science and Technology, Northwest A&F University) ;
  • Guibing, Song (College of Animal Science and Technology, Northwest A&F University) ;
  • Yuan, Pang (College of Animal Science and Technology, Northwest A&F University) ;
  • Lei, Jiang (College of Animal Science and Technology, Northwest A&F University) ;
  • Linsen, Zan (College of Animal Science and Technology, Northwest A&F University) ;
  • Hongbao, Wang (College of Animal Science and Technology, Northwest A&F University)
  • Received : 2022.04.09
  • Accepted : 2022.08.14
  • Published : 2023.02.01
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Abstract

Objective: Muscle acetylcholine receptors have five alpha subunits (α, β, δ, ε, or γ), and cholinergic receptor nicotinic gamma subunit (CHRNG) is the γ subunit. It may also play an essential role in biological processes, including cell differentiation, growth, and survival, while the role of CHRNG has not been studied in the literature. Therefore, the purpose of this study is to clarify the effect of CHRNG on the proliferation and differentiation of bovine preadipocytes. Methods: We constructed a CHRNG overexpression adenovirus vector and successfully overexpressed it on bovine preadipocytes. The effects of CHRNG on bovine preadipocyte proliferation were detected by Edu assay, cell counting Kit-8 (CCK-8), real-time fluorescence quantitative polymerase chain reaction (RT-qPCR), Western blot and other techniques. We also performed oil red O, RT-qPCR, Western blot to explore its effect on the differentiation of preadipocytes. Results: The results of Edu proliferation experiments showed that the number of EDU-positive cells in the overexpression group was significantly less. CCK-8 experiments found that the optical density values of the cells in the overexpression group were lower than those of the control group, the mRNA levels of proliferating cell nuclear antigen (PCNA), cyclin A2 (CCNA2), cyclin B1 (CCNB1), cyclin D2 (CCND2) decreased significantly after CHRNG gene overexpression, the mRNA levels of cyclin dependent kinase inhibitor 1A (CDKN1A) increased significantly, and the protein levels of PCNA, CCNB1, CCND2 decreased significantly. Overexpression of CHRNG inhibited the differentiation of bovine preadipocytes. The results of oil red O and triglyceride determination showed that the size and speed of lipid droplets accumulation in the overexpression group were significantly lower. The mRNA and protein levels of peroxisome proliferator activated receptor gamma (PPAR class="checkNonKBPoint">γ), CCAAT enhancer binding protein alpha (CEBPα), fatty acid binding protein 4 (FABP4), fatty acid synthase (FASN) decreased significantly. Conclusion: Overexpression of CHRNG in bovine preadipocytes inhibits the proliferation and differentiation of bovine preadipocytes.

Keywords

Acknowledgement

We thank all authors for their help in this research. We would like to thank the National Beef Cattle Improvement Center (Yangling, Shaanxi Province, China) for providing Qinchuan cattle tissue samples and preadipocytes.

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