LncRNA SLC7A11-AS1 Contributes to Lung Cancer Progression Through Facilitating TRAIP Expression by Inhibiting miR-4775
Authors Liu Y, Fan X, Zhao Z, Shan X
Received 9 March 2020
Accepted for publication 21 May 2020
Published 30 June 2020 Volume 2020:13 Pages 6295—6302
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 4
Editor who approved publication: Dr Tohru Yamada
Yongmin Liu,1,* Xinglong Fan,2,* Zheng Zhao,3 Xiu Shan4
1Department of Oncology, General Hospital of Heilongjiang Province Land Reclamation Bureau, Harbin 150088, People’s Republic of China; 2Thoracic Department, Qilu Hospital of Shandong University, Qingdao 266035, People’s Republic of China; 3Third Department of Medical Oncology, Shaanxi Provincial Caner Hospital, Xi’an 710061, People’s Republic of China; 4Department of Oncology, The First Affiliated Hospital of Dalian Medical University, Dalian 116044, People’s Republic of China
*These authors contributed equally to this work
Correspondence: Xiu Shan
Department of Oncology, The First Affiliated Hospital of Dalian Medical University, Dalian 116044, People’s Republic of China
Third Department of Medical Oncology, Shaanxi Provincial Caner Hospital, Xi’an 710061, People’s Republic of China
Purpose: Long non-coding RNAs (lncRNAs) are important regulators of lung cancer. This article introduced a novel lncRNA, SLC7A11-AS1, whose effects on lung cancer development have been explored.
Methods: Lung cancer tissues and normal tissues of 47 patients were collected. Bronchial epithelial cell line (BEAS-2B) and lung cancer cell lines (H520, H596, A549 and H1299) were cultured. H1299 and A549 cells were transfected with siSLC7A11-AS1 or siNC. The proliferation, migration and invasion of H1299 and A549 cells were detected by CCK-8 assay and Transwell experiment. Caspase-3 activity in H1299 and A549 cells was researched using caspase-3 activity detection kit. Dual-luciferase reporter gene assay and RNA pull-down assay were performed to explore the relationship between SLC7A11-AS1 and miR-4775. SLC7A11-AS1, miR-4775 and TRAIP mRNA expressions in tissues/cells were detected by qRT-PCR.
Results: The up-regulated SLC7A11-AS1 in lung cancer patients was associated with metastasis and advanced tumor stage (P < 0.05). SLC7A11-AS1 was significantly up-regulated in lung cancer cells (P < 0.05). Silencing of SLC7A11-AS1 prominently inhibited H1299 and A549 cells proliferation, migration and invasion in vitro (P < 0.05). SLC7A11-AS1 acted as a sponge to inhibit miR-4775 expression in H1299 and A549 cells. Meanwhile, TRAIP expression in H1299 and A549 cells was directly and negatively regulated by miR-4775. Inhibition of miR-4775 or overexpression of TRAIP in H1299 and A549 cells remarkably reversed the reduced proliferation, migration and invasion induced by SLC7A11-AS1 silencing (P < 0.05).
Conclusion: SLC7A11-AS1 promoted lung cancer development by enhancing TRAIP expression via suppressing miR-4775.
Keywords: lung cancer, progression, SLC7A11-AS1, miR-4775, TRAIP
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