Circ_0039960 regulates growth and Warburg effect of breast cancer cells via modulating miR-1178/PRMT7 axis. (August 2022)

• Record Type: Journal Article
• Authors: Ma, Weichang; Sun, Xiaojun; Zhang, Shupeng; Chen, Zhenghua; Yu, Jianing
• Is Part Of: Molecular and cellular probes. Volume 64(2022)
• Publication Date: 2022-08
• Subjects: Circ_0039960 -- Cell growth -- Warburg effect -- Breast cancer -- miR-1178 -- PRMT7; BC Breast cancer -- ceRNA competing endogenous RNA -- circRNA Circular RNA -- ECAR extracellular acidification rate -- miRNA microRNA -- OCR oxygen consumption rate -- PI propidium iodide -- PRMT7 Protein arginine methyltransferase 7 -- RIP RNA immunoprecipitation -- SEM standard error of mean; Molecular probes -- Diagnostic use -- Periodicals; Pathology, Cellular -- Technique -- Periodicals; Cell Biology -- Periodicals; Molecular Biology -- Periodicals; Sondes moléculaires -- Utilisation diagnostique -- Périodiques; Cytopathologie -- Technique -- Périodiques; 572
• DOI: 10.1016/j.mcp.2022.101829
• Languages: English
• ISSNs: 0890-8508

Abstract

Abstract: Background: Breast cancer (BC) is a serious threat to women's life and healthy. Increasing evidence indicated that blocking Warburg effect could attenuate the development of BC. Circular RNAs (circRNAs) has been found to be dysregulated in various carcinomas, including BC. Our study aims to illustrate the role and regulatory mechanism of circ_0039960 in BC development. Methods: RT-qPCR and western blotting were utilized to evaluate the expression of circ_0039960 in tissues recruited from 32 cases of BC patients and also BC cell lines. Circ_0039960 shRNA was transfected into cells to explore its function on cell processes. CCK-8, flow cytometry and ELISA were used to measure cell viability, cell cycle and apoptosis. Warburg effect was detected by using commercial kits. Besides, bioinformatic prediction, RIP and luciferase reporter assays were performed to validate the interactions between circ_0039960, miR-1178 and PRMT7. Results: The results showed that circ_0039960 and PRMT7 were both up-regulated, while miR-1178 was down-regulated, in BC tissues and cells. Silencing circ_0039960 effectively inhibited cell viability and Warburg effect of BC cells, also, induced cell cycle arrest and apoptosis. Moreover, we validated that circ_0039960 positively mediated PRMT7 expression via directly targeting to miR-1178. The inhibition of miR-1178 and overexpression of PRMT7 reversed the effect of circ_0039960 knockdown on BC cell growth and Warburg effect. Conclusion: In general, our research demonstrated that circ_0039960 regulates cell growth and Warburg effect in BC cells via miR-1178/PRMT7 axis. This may provide new evidence for the exploration of BC diagnostic and therapeutic targets. Graphical abstract: Image 1 Highlights: Circ_0039960 was up-regulated and correlated with BC prognosis. Inhibiting circ_0039960 suppressed BC cell processes. Inhibiting circ_0039960depressed Warburg effect in BC cells. Circ_0039960 targeted to PRMT7 via sponging miR-1178. Circ_0039960regulated BC cell processes and Warburg effect via miR-1178/PRMT7.