Wei Liu, Qingning Li, Nan Zhu, Shuo Zhang, Juehua Jing, Junfeng Zhan

Circ_0079471 Regulates the Proliferation, Migration, Invasion and Apoptosis of Osteosarcoma Cells by Mediating miR-485-3p and TRIP6

  • Pharmacology
  • Molecular Medicine
  • Drug Discovery
  • Biochemistry
  • Organic Chemistry

Background: Circular RNAs (circRNAs) are a special class of non-coding RNA molecules that show a closed circular structure and have been implicated in both tumour formation and oncogenesis. Objective: This study aimed to learn more about how circ_0079471 functions in osteosarcomas (OSs). Method: Quantitative real-time polymerase chain reaction was used to detect the expression levels of thyroid hormone receptor-interacting protein 6 (TRIP6), miR-485-3p and circ_0079471. Methyl-thiazolyl-tetrazolium and flow cytometry were used to track cell growth and cell-cycle progression, and the research explored wound healing (migration) and invasion using Transwell plates. Western blotting was used to determine the protein expression of TRIP6, proliferating cell nuclear antigen and cyclin D1, and a dual-luciferase assay revealed the target relationship. Result: A xenograft experiment evaluated the in vivo effects of circ_0079471 on OS, and the results revealed the high expression of circ_0079471 in OS tissue and cells. The proliferation, cell-cycle migration and invasion of cells were reduced after circ_0079471 knockdown in OS cells; however, the effects of this knockdown were reversed when TRIP6 was overexpressed in the OS cells. The function of circ_0079471 was also achieved by in vivo miR-485-3p sponging. The upregulation of miR-485-3p and the downregulation of TRIP6 partly resulted in circ_0079471 downregulation, which subsequently inhibited OS progression. Conclusion: According to these results, circ_0079471 influences the development of OS by regulating miR-485-3p and TRIP6

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