ArticleBiochemical genetics2023
Circular RNA Circ_0005962 Contributes to Lung Adenocarcinoma Cell Proliferation and Stem Cell Formation Through Sponging of miR-3611 and Modulating CYP24A1 Expression.
Article in Biochemical genetics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Recently, several studies have revealed that circular RNAs (circRNAs) play significant roles in various tumors, including lung adenocarcinoma (LUAD). Furthermore, it has been reported that circ_0005962 was upregulated in LUAD cells. Accordingly, this research is designed to investigate the mechanism of circ_0005962 on LUAD development. Circ_0005962, microRNA-3611 (miR-3611), and Cytochrome P450 family 24 subfamily A member 1 (CYP24A1) level were detected by real-time quantitative polymerase chain reaction (RT-qPCR). Cell proliferation ability, cell cycle progression, and sphere formation ability were detected using Cell Counting Kit-8 (CCK-8), 5-ethynyl-2'-deoxyuridine (EdU), Colony formation, flow cytometry, and sphere formation assay. Protein levels of proliferating cell nuclear antigen (PCNA), Ki67, NANOG, CD133, OCT4, and CYP24A1 were determined using Western blot assay. Using bioinformatics software (Starbase3.0 and TargetScan), the binding between miR-3611 and circ_0005962 or CYP24A1 was predicted and proved using RNA Immunoprecipitation (RIP) and RNA pull-down assays. A xenograft tumor model in vivo was used to analyze the biological role of circ_0005962 on LUAD cell growth. Increased circ_0005962 and CYP24A1, and reduced miR-3611 were observed in LUAD tissues and cell lines. Functional assays testified that circ_0005962 depletion might hinder LUAD cell proliferation and sphere formation capability, but induced cell apoptosis in vitro. Molecular mechanism experiments exhibited that circ_0005962 served as a miR-3611 sponge and mediated CYP24A1 content by absorbing miR-3611. Additionally, silencing of circ_0005962 inhibited tumor growth in xenograft modes. Together, circ_0005962 was overexpressed in LUAD, and its deficiency repressed LUAD progression via targeting the miR-3611/ CYP24A1 axis, providing a novel mechanism for understanding the development of LUAD.
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