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  • Title: CircETV6 acts as an oncogenic driver in hepatocellular carcinoma progression.
    Author: Li X, Jiang X, Lu J, Jiang L, Li Y, Lin Y, Wan F, Wang C.
    Journal: J Biochem Mol Toxicol; 2024 Sep; 38(9):e23766. PubMed ID: 39215759.
    Abstract:
    Circular RNA (circRNA) plays important role in hepatocellular carcinoma (HCC) progression. However, the role and mechanism of circETV6 in HCC progression remain unclear. The levels of circETV6, ETV6, miR-383-5p, and PTPRE were tested by quantitative reverse-transcription polymerase chain reaction. Cell functions were assessed using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide assay, 5-ethynyl-2'-deoxyuridine assay, colony formation assay, wound healing assay, transwell assay, and flow cytometry. The protein levels of poptosis-related markers and PTPRE were determined by western blot analysis. RNA interaction was analyzed by dual-luciferase reporter assay and RNA pull-down assay. A xenograft model was established to assess circETV6 roles in vivo. CircETV6 was highly expressed in HCC tissues and cells. CircETV6 knockdown repressed HCC cell proliferation, migration, invasion, and cell cycle, while accelerated apoptosis. CircETV6 targeted miR-383-5p, and miR-383-5p inhibition reversed the regulation of circETV6 knockdown on HCC cell progression. CircETV6 promoted PTPRE level via targeting miR-383-5p. Overexpressed PTPRE abolished the inhibition effect of miR-383-5p on HCC cell progression. In addition, circETV6 knockdown slowed HCC tumor growth in vivo. CircETV6 might facilitate HCC progression via the miR-383-5p/PTPRE axis, providing a novel target for HCC treatment.
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