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:: Volume 22, Issue 2 (4-2024) ::
Int J Radiat Res 2024, 22(2): 481-486 Back to browse issues page
m6A methylation pattern of SLC7A11 mediates the effects of cinobufagin on hepatocellular carcinoma cell proliferation and radioresistance
F. Ma , W. Zhang , X. Sun
Department of Hepatobiliary Surgery, Linyi People’s Hospital, Linyi, 276003, China , sunxjun2004@sina.com
Abstract:   (635 Views)
Background: To determine whether and how cinobufagin regulates hepatocellular carcinoma (HCC) cell proliferation and radioresistance. Materials and Methods: Radiosensitive (HepG2-NC) and radioresistant (HepG2-SR) HCC cells were treated with cinobufagin, X-ray ionizing radiation (IR) or a combination of cinobufagin and IR at different doses. Cell counting was performed using the Cell Counting Kit-8 assay. Key ferroptosis marker levels were determined using the indicated methods. RNA immunoprecipitation using an anti-m6A antibody followed by quantitative polymerase chain reaction was performed to determine the m6A levels in SLC7A11 mRNA. Results: Cinobufagin inhibited the proliferation of HepG2-NC and HepG2-SR cells. Exposure to X-rays decreased the HepG2-NC cell count in a time- and dose-dependent manner, but did not affect HepG2-SR cells. A low dose of cinobufagin did not change the cell count without IR exposure, but re-sensitized HepG2-SR cells to IR. The combination of low-dose cinobufagin and IR increased ferroptosis and decreased SLC7A11 expression levels. Mechanistically, the combination of a low dose of cinobufagin and IR decreased m6A levels in the 3' UTR of SLC7A11 in a METTL3-dependent manner. Conclusion: A low dose of cinobufagin exerted synergistic effects with IR and re-sensitized radioresistant HCC cells to IR via a METTL3/m6A-dependent pathway.
Keywords: Hepatocellular carcinoma, radioresistance, synergistic effect, ferroptosis, m6A methylation.
Full-Text [PDF 1230 kb]   (204 Downloads)    
Type of Study: Original Research | Subject: Radiation Biology
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Ma F, Zhang W, Sun X. m6A methylation pattern of SLC7A11 mediates the effects of cinobufagin on hepatocellular carcinoma cell proliferation and radioresistance. Int J Radiat Res 2024; 22 (2) :481-486
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Volume 22, Issue 2 (4-2024) Back to browse issues page
International Journal of Radiation Research
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