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Protein & Peptide Letters

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ISSN (Print): 0929-8665
ISSN (Online): 1875-5305

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Research Article

circ_0006089 Facilitates Gastric Cancer Progression via Decoying miR- 515-5p and Up-regulating CXCL6

Author(s): Qiuxia Guo, Xiangwu Ding, Fei Lv, Aixiang Wang and Jing Wang*

Volume 30, Issue 4, 2023

Published on: 07 April, 2023

Page: [314 - 324] Pages: 11

DOI: 10.2174/0929866530666230308145835

Price: $65

Abstract

Background: Gastric cancer (GC) is the most common cancer globally. Recent research has suggested that circular RNAs (circRNAs) play crucial roles in GC tumorigenesis and progression. The present study is performed to clarify the possible mechanism of circRNA has_circ_0006089 (circ_0006089) in GC.

Methods: The differentially expressed circRNAs were screened out by analyzing the dataset GSE83- 521. Quantitative real-time polymerase chain reaction (qRT-PCR) was performed to detect circ_0006089, miR-515-5p and CXCL6 expression levels in GC tissues and cell lines. CCK-8, BrdU and Transwell assays were adopted to examine the biological function of circ_0006089 in GC cells. The interaction between miR-515-5p and circ_0006089, as well as between CXCL6 and miR-515-5p, was confirmed through bioinformatics, RNA immunoprecipitation (RIP) assay, dual-luciferase reporter gene assay and RNA pull-down assay.

Results: Circ_0006089 was significantly upregulated in GC tissues and cells, and miR-515-5p was remarkably downregulated. After knocking down circ_0006089 or overexpressing miR-515-5p, the growth, migration and invasion of GC cells were markedly reduced. In terms of mechanism, miR-515- 5p was verified to be the target of circ_0006089, and CXCL6 was validated as miR-515-5p’s downstream target gene. Inhibiting miR-515-5p reversed the inhibitory effect knocking down circ_0006089 had on GC cell proliferation, migration and invasion.

Conclusion: Circ_0006089 facilitates the malignant biological behaviors of GC cells via the miR-515- 5p/CXCL6 axis. Circ_0006089 can probably act as one of the important biomarkers and therapeutic targets in GC treatment strategies.

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