Cancer Res Treat.  2018 Oct;50(4):1396-1417. 10.4143/crt.2017.537.

Circular RNA-ZFR Inhibited Cell Proliferation and Promoted Apoptosis in Gastric Cancer by Sponging miR-130a/miR-107 and Modulating PTEN

Affiliations
  • 1Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China. xiufengling_njfy@163.com, ldjslyy01@163.com
  • 2Department of Ultrasonics, First Affiliated Hospital of Kunming Medical University, Kunming, China.

Abstract

PURPOSE
This study aimed to probe into the associations among circular RNA ZFR (circ-ZFR), miR-130a/miR-107, and PTEN, and to investigate the regulatory mechanism of circ-ZFR-miR-130a/miR-107-PTEN axis in gastric cancer (GC).
MATERIALS AND METHODS
GSE89143 microarray data used in the study were acquired from publicly available Gene Expression Omnibus database to identify differentially expressed circular RNAs inGC tissues. The expressions of circ-ZFR, miR-130a, miR-107, and PTEN were examined by real-time reverse transcription polymerase chain reaction, while PTEN protein expression was measured by western blot. The variation of GC cell proliferation and apoptosis was confirmed by cell counting kit-8 assay and flow cytometry analysis. The targeted relationships among circZFR, miR-130a/miR-107, and PTEN were predicted via bioinformatics analysis and demonstrated by dual-luciferase reporter assay and RNA immunoprecipitation assay. The impact of ZFR on gastric tumor was further verified in xenograft mice model experiment.
RESULTS
Circ-ZFR and PTEN were low-expressed whereas miR-107 and miR-130a were highexpressed in GC tissues and cells. There existed targeted relationships and interactions between miR-130a/miR-107 and ZFR/PTEN. Circ-ZFR inhibited GC cell propagation, cell cycle and promoted apoptosis by sponging miR-107/miR-130a, while miR-107/miR-130a promoted GC cell propagation and impeded apoptosis through targeting PTEN. Circ-ZFR inhibited cell proliferation and facilitated apoptosis in GC by sponging miR-130a/miR-107 and modulating PTEN. Circ-ZFR curbed GC tumor growth and affected p53 protein expression in vivo.
CONCLUSION
Circ-ZFR restrained GC cell proliferation, induced cell cycle arrest and promoted apoptosis by sponging miR-130a/miR-107 and regulating PTEN.

Keyword

Circ-ZFR; miR-130a; miR-107; PTEN; Stomach neoplasms

MeSH Terms

Animals
Apoptosis*
Blotting, Western
Cell Count
Cell Cycle
Cell Cycle Checkpoints
Cell Proliferation*
Computational Biology
Flow Cytometry
Gene Expression
Heterografts
Immunoprecipitation
Mice
Polymerase Chain Reaction
PTEN Phosphohydrolase
Reverse Transcription
RNA
Stomach Neoplasms*
PTEN Phosphohydrolase
RNA
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