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The lncRNA NORAD/miR-520a-3p Facilitates Malignancy in Non-Small Cell Lung Cancer via PI3k/Akt/mTOR Signaling Pathway

Authors Wan Y, Yao Z, Chen W, Li D

Received 13 September 2019

Accepted for publication 16 January 2020

Published 19 February 2020 Volume 2020:13 Pages 1533—1544


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Leo Jen-Liang Su

Yunyan Wan, Zhouhong Yao, Weijuan Chen, Dezhi Li

Department of Respiratory and Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, People’s Republic of China

Correspondence: Dezhi Li
Department of Respiratory and Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong University, No. 324 Jingwuweiqi Road, Jinan, Shandong 250021, People’s Republic of China

Background/Aims: The effects of lncRNA-NORAD/mir-520a-3p on proliferation and invasion of non-small cell lung cancer (NSCLC) were studied, and its potential molecular mechanism was discussed.
Methods: qRT-PCR was used to detect the expression of lncRNA NORAD and miR-520a-3p in non-small cell lung cancer tissues and cell lines. CCK-8 method and Transwell test were used to identify the effects of lncRNA NORAD on the proliferation and invasion in NSCLC. Target gene prediction and screening and luciferase reporter assay was used to verify downstream target genes of lncRNA NORAD. The expressions of PI3K, AKT, and mTOR proteins were detected by Western blot.
Results: Compared with normal tissues and cells, the expressions of lncRNA NORAD in cancer tissues and cells were significantly higher. Compared with normal cells, the expression of miR-520a-3p in cells was considerably lower. LncRNA NORAD could accelerate the growth and metastasis of NSCLC in vitro and in vivo. Luciferase reporter assay results indicated that miR-520a-3p was a downstream target gene of lncRNA NORAD. Further findings showed that lncRNA NORAD might bind to miR-520a-3p, thereby affecting the PI3k/Akt/mTOR signaling pathway.
Conclusion: LncRNA NORAD can regulate the proliferation of NSCLC by regulating miR-520a-3p/PI3k/Akt/mTOR signaling pathway, thus promoting the occurrence and development of NSCLC.

Keywords: non-small cell lung cancer, lncRNA NORAD, miR-520a-3p, PI3k/Akt/mTOR, proliferation

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