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Long Non-Coding RNA BLACAT1 Promotes the Tumorigenesis of Gastric Cancer by Sponging microRNA-149-5p and Targeting KIF2A

Authors Wang Z, Liu X, Liu X, Niu D

Received 21 April 2020

Accepted for publication 9 July 2020

Published 30 July 2020 Volume 2020:12 Pages 6629—6640

DOI https://doi.org/10.2147/CMAR.S258178

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Eileen O'Reilly


Zhengkun Wang,1 Xichun Liu,1 Xiaolei Liu,2 Dongguang Niu1

1Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao City, Shandong Province 266000, People’s Republic of China; 2Department of General Surgery, Affiliated Hospital of Qingdao University, Qingdao City, Shandong Province 266000, People’s Republic of China

Correspondence: Dongguang Niu Tel +86-13963999533
Email niudongguang283@163.com

Objective: Gastric cancer (GC) is a gastrointestinal tumor. This study is aimed to explore the regulatory mechanism of long non-coding RNA BLACAT1 (BLACAT1)/microRNA-149-5p (miR-149-5p)/KIF2A cascade on GC.
Methods: The expression of BLACAT1, miR-149-5p and KIF2A in GC was detected by qRT-PCR. The proliferation, migration and invasion of GC cells in vitro were analyzed by MTT, wound-healing and transwell assay, respectively. The xenograft tumor model was constructed in nude mice to confirm the inhibition effect of BLACAT1 knockdown on GC in vivo. Then, dual-luciferase reporter assay was used to detect the interactions among BLACAT1, miR-149-5p and KIF2A. Western blot assay was performed to determine the protein expression of KIF2A.
Results: The expression of BLACAT1 and KIF2A was up-regulated in GC, but miR-149-5p expression was down-regulated. Silencing of BLACAT1 retarded the proliferation, migration and invasion of GC cells in vitro and the growth of tumor xenograft in vivo. Moreover, BLACAT1 acted as the molecular sponge of miR-149-5p to up-regulate KIF2A expression. At last, feedback experiments suggested that BLACAT1 accelerated the proliferation, migration and invasion of GC cells by regulating miR-149-5p/KIF2A axis.
Conclusion: BLACAT1 facilitated the tumorigenesis of GC through regulating miR-149-5p/KIF2A axis, which indicated BLACAT1/miR-149-5p/KIF2A cascade may be a new therapeutic target.

Keywords: gastric cancer, long non-coding RNA BLACAT1, microRNA-149-5p, KIF2A, proliferation

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