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Invasion-related circular RNA circFNDC3B inhibits bladder cancer progression through the miR-1178-3p/G3BP2/SRC/FAK axis
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Invasion-related circular RNA circFNDC3B inhibits bladder cancer progression through the miR-1178-3p/G3BP2/SRC/FAK axis
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Invasion-related circular RNA circFNDC3B inhibits bladder cancer progression through the miR-1178-3p/G3BP2/SRC/FAK axis
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Journal Article
Invasion-related circular RNA circFNDC3B inhibits bladder cancer progression through the miR-1178-3p/G3BP2/SRC/FAK axis
2018
Overview
Background
Increasing evidence has revealed that circular RNAs (circRNAs) play crucial roles in cancer biology. However, the role and underlying regulatory mechanisms of circFNDC3B in bladder cancer (BC) remain unknown.
Methods
A cell invasion model was established by repeated transwell assays, and invasion-related circRNAs in BC were identified through an invasion model. The expression of circFNDC3B was detected in 82 BC tissues and cell lines by quantitative real-time PCR. Functional assays were performed to evaluate the effects of circFNDC3B on proliferation, migration and invasion in vitro-, and on tumorigenesis and metastasis in vivo. The relationship between circFNDC3B and miR-1178-3p was confirmed by fluorescence in situ hybridization, pull-down assay and luciferase reporter assay.
Results
In the present study, we identified a novel circRNA (circFNDC3B) through our established BC cell invasion model. We found that circFNDC3B was dramatically downregulated in BC tissues and correlated with pathological T stage, grade, lymphatic invasion and patients’ overall survival rate. Functionally, overexpression of circFNDC3B significantly inhibited proliferation, migration and invasion both in vitro and in vivo. Mechanistically, circFNDC3B could directly bind to miR-1178-3p, which targeted the 5′UTR of the oncogene G3BP2. Moreover, circFNDC3B acted as a miR-1178-3p sponge to suppress G3BP2, thereby inhibiting the downstream SRC/FAK signaling pathway.
Conclusions
CircFNDC3B may serve as a novel tumor suppressive factor and potential target for new therapies in human BC.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Adaptor Proteins, Signal Transducing
/ Adult
/ Aged
/ Analysis
/ Animals
/ Biomedical and Life Sciences
/ Cancer
/ Female
/ Fluorescence in situ hybridization
/ Focal Adhesion Kinase 1 - genetics
/ G3BP2
/ Gene Expression Regulation, Neoplastic
/ Humans
/ Kinases
/ Male
/ Mice
/ Oncology
/ Proteins
/ RNA
/ src-Family Kinases - genetics
/ SRC/FAK
/ Urinary Bladder Neoplasms - genetics
/ Urinary Bladder Neoplasms - metabolism
/ Urinary Bladder Neoplasms - mortality
