Veterinary Medicine and Science (Jan 2023)

TBX2 affects proliferation, apoptosis and cholesterol generation by regulating mitochondrial function and autophagy in bovine cumulus cell

  • Sheng‐Peng Li,
  • Hao Jiang,
  • Zi‐Bin Liu,
  • Wen‐Jie Yu,
  • Xiao‐Shi Cai,
  • Chang Liu,
  • Wen‐Yin Xie,
  • Fu‐shi Quan,
  • Wei Gao,
  • Nam‐Hyung Kim,
  • Bao Yuan,
  • Cheng‐Zhen Chen,
  • Jia‐Bao Zhang

DOI
https://doi.org/10.1002/vms3.1009
Journal volume & issue
Vol. 9, no. 1
pp. 326 – 335

Abstract

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Abstract Background T‐box transcription factor 2 (TBX2) is a member of T‐box gene family whose members are highly conserved in evolution and encoding genes and are involved in the regulation of developmental processes. The encoding genes play an important role in growth and development. Although TBX2 has been widely studied in cancer cell growth and development, its biological functions in bovine cumulus cells remain unclear. Objectives This study aimed to investigate the regulatory effects of TBX2 in bovine cumulus cells. Methods TBX2 gene was knockdown with siRNA to clarify the function in cellular physiological processes. Cell proliferation and cycle changes were determined by xCELLigence cell function analyzer and flow cytometry. Mitochondrial membrane potential and autophagy were detected by fluorescent dye staining and immunofluorescence techniques. Western blot and quantitative real‐time reverse transcription polymerase chain reaction (qRT‐PCR) were used to detect the expression changes of proliferation and autophagy‐related proteins. Aadenosine triphosphate (ATP) production, glucose metabolism, and cholesterol synthesis of cumulus cells were measured by optical density and chemiluminescence analysis. Results After inhibition of TBX2, the cell cycle was disrupted. The levels of apoptosis, ratio of light chain 3 beta II/I, and reactive oxygen species were increased. The proliferation, expansion ability, ATP production, and the amount of cholesterol secreted by cumulus cells were significantly decreased. Conclusions TBX2 plays important roles in regulating the cells’ proliferation, expansion, apoptosis, and autophagy; maintaining the mitochondrial function and cholesterol generation of bovine cumulus cells.

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