miR-21靶向抑制RECK对宫颈癌Hela细胞增殖、侵袭和放射敏感性作用

doi:10.3760/cma.j.cn113030-20210204-00063

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Abstract Objective To explore the effect of miR-21 on cell proliferation, apoptosis, invasion and radiosensitivity of cervical cancer HeLa cells and unravel the underlying mechanism. Methods RT-qPCR assay was used to detect the expression levels of miR-21 in cervical cancer tissues and adjacent non-tumor tissues, normal cervical epithelial cells (H8) and cervical cancer cell lines (HeLa, SiHa, ME180). HeLa cell line with inhibition of miR-21 or knockdown of RECK were constructed. CCK-8, Caspase3/7 live cell apoptosis detection, wound healing test, Transwell invasion, clone formation assay, Western blot and immunofluorescence were performed to detect cell viability, apoptosis, migration, invasion, radiosensitivity and related proteins. The dual luciferase assay verified whether miR-21 targeted RECK. Results MiR-21 level in the cervical cancer tissues was significantly higher than that in its corresponding adjacent non-tumor tissues (P<0.05). The expression levels of miR-21 in cervical cancer cell lines HeLa, SiHa and ME180 were significantly up-regulated compared with those in normal cervical epithelial cells H8(all P<0.05). MiR-21 knockdown significantly inhibited HeLa cell viability, promoted cell apoptosis, reduced radiation tolerance, down-regulated the expression of Cyclin D1, Bcl-2, MMP-2 and MMP-9, and up-regulated the expression P21 and Bax proteins (all P<0.05). miR-21 targeted the 3’-UTR of RECK mRNA and negatively regulated the expression of RECK. Silencing RECK reversed the effects of miR-21 knockdown on HeLa cell apoptosis, migration, invasion and radiosensitivity. Conclusions Inhibiting the expression of miR-21significantly decreases cell viability, induces cell apoptosis, weakens cell migration and invasion capabilities, and enhances the radiosensitivity of HeLa cells. The potential mechanism is closely related to the targeted up-regulation of RECK.

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	Su Yuehui
	Zhang Mengzhen

Key words： miR-21 gene RECK gene Invasion Radiosensitivity HeLa cell line

Received: 04 February 2021

Fund:Key Scientific Research Projects of Colleges and Universities in Henan Province (19A320007)

Corresponding Authors: Zhang Mengzhen, Email:fcczhangmz@zzu.edu.cn

Cite this article:

Su Yuehui,Zhang Mengzhen. miR-21 regulates the proliferation, invasion and radiosensitivity of cervical cancer HeLa cells by targeting RECK[J]. Chinese Journal of Radiation Oncology, 2022, 31(3): 277-283.

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http://journal12.magtechjournal.com/Jweb_fszlx/EN/10.3760/cma.j.cn113030-20210204-00063 OR http://journal12.magtechjournal.com/Jweb_fszlx/EN/Y2022/V31/I3/277

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