J Cancer 2022; 13(5):1664-1678. doi:10.7150/jca.57691 This issue

Research Paper

Circular RNA circASPM promotes the progression of glioblastoma by acting as a competing endogenous RNA to regulate miR-130b-3p/E2F1 axis

Dianqi Hou1*, Zhenlin Wang2*, Haimeng Li3, Juan Liu1, Yaohua Liu1, Yang Jiang4✉, Meiqing Lou1✉

1. Department of Neurosurgery, Shanghai General Hospital of Nanjing Medical University, Shanghai 201620, China.
2. Division of Experimental Neurosurgery, Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany.
3. Department of Neurosurgery, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, 1500 Zhouyuan Rd, Pudong New District, Shanghai, China.
4. Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
*Authors with equal contribution

This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/). See http://ivyspring.com/terms for full terms and conditions.
Hou D, Wang Z, Li H, Liu J, Liu Y, Jiang Y, Lou M. Circular RNA circASPM promotes the progression of glioblastoma by acting as a competing endogenous RNA to regulate miR-130b-3p/E2F1 axis. J Cancer 2022; 13(5):1664-1678. doi:10.7150/jca.57691. Available from https://www.jcancer.org/v13p1664.htm

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Graphic abstract

Background: Glioblastoma Multiform (GBM) is the primary malignancy with the highest incidence and worst prognosis in the adult CNS. Circular RNAs (circRNAs) are a novel and widely diverse class of endogenous non-coding RNAs that can promote or inhibit gliomagenesis. Our study aimed to explore the role of circASPM in GBM and its molecular mechanism.

Methods: Levels of circASPM, miR-130b-3p and E2F1 were determined by quantitative real-time PCR (qRT-PCR) or western blotting assay. MTS, Edu, neurospheres formation and extreme limiting dilution assays were used to detect the tumorigenesis and proliferation of GSCs in vitro. The interactions between miR-130b-3p and circASPM or E2F1 were demonstrated via qPCR, western blotting, dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. Xenograft experiments were used to analyze tumor growth in vivo.

Results: CircASPM was overexpressed in GBM and promoted the tumorigenesis and proliferation of GSCs both in vitro and in vivo. Mechanistically, circASPM up-regulated the expression of E2F1 in GSCs via miR-130b-3p sponging. We furtherly demonstrated that circAPSM could promote the GSCs proliferation via E2F1 up-regulating. Therefore, our study identified a novel circRNA and its possible mechanism in the development and tumorigenesis of GBM.

Conclusions: CircASPM can promote GBM progression via regulating miR-130b-3p/E2F1 axis, suggesting that circAPSM could provide an effective biomarker for GBM diagnosis and prognostic evaluation and possibly being used for molecular targeted therapy.

Keywords: Glioblastoma, circASPM, Glioma stem cells, miR-130b-3p, E2F1