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Journal of Hematology & Oncology
Published in: Journal of Hematology & Oncology 1/2018

Open Access 01-12-2018 | Research

The lncRNA NEAT1 activates Wnt/β-catenin signaling and promotes colorectal cancer progression via interacting with DDX5

Authors: Meng Zhang, Weiwei Weng, Qiongyan Zhang, Yong Wu, Shujuan Ni, Cong Tan, Midie Xu, Hui Sun, Chenchen Liu, Ping Wei, Xiang Du

Published in: Journal of Hematology & Oncology | Issue 1/2018

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Abstract

Background

The long noncoding RNA nuclear-enriched abundant transcript 1 (NEAT1) has been reported to be overexpressed in colorectal cancer (CRC). However, its underlying mechanisms in the progression of CRC have not been well studied.

Methods

To investigate the clinical significance of NEAT1, we analyzed its expression levels in a publicly available dataset and in 71 CRC samples from Fudan University Shanghai Cancer Center. Functional assays, including the CCK8, EdU, colony formation, wound healing, and Transwell assays, were used to determine the oncogenic role of NEAT1 in human CRC progression. Furthermore, RNA pull-down, mass spectrometry, RNA immunoprecipitation, and Dual-Luciferase Reporter Assays were used to determine the mechanism of NEAT1 in CRC progression. Animal experiments were used to determine the role of NEAT1 in CRC tumorigenicity and metastasis in vivo.

Results

NEAT1 expression was significantly upregulated in CRC tissues compared with its expression in normal tissues. Altered NEAT1 expression led to marked changes in proliferation, migration, and invasion of CRC cells both in vitro and in vivo. Mechanistically, we found that NEAT1 directly bound to the DDX5 protein, regulated its stability, and sequentially activated Wnt signaling. Our study showed that NEAT1 indirectly activated the Wnt/β-catenin signaling pathway via DDX5 and fulfilled its oncogenic functions in a DDX5-mediated manner. Clinically, concomitant NEAT1 and DDX5 protein levels negatively correlated with the overall survival and disease-free survival of CRC patients.

Conclusions

Our findings indicated that NEAT1 activated Wnt signaling to promote colorectal cancer progression and metastasis. The NEAT1/DDX5/Wnt/β-catenin axis could be a potential therapeutic target of pharmacological strategies.
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Metadata
Title
The lncRNA NEAT1 activates Wnt/β-catenin signaling and promotes colorectal cancer progression via interacting with DDX5
Authors
Meng Zhang
Weiwei Weng
Qiongyan Zhang
Yong Wu
Shujuan Ni
Cong Tan
Midie Xu
Hui Sun
Chenchen Liu
Ping Wei
Xiang Du
Publication date
01-12-2018
Publisher
BioMed Central
Published in
Journal of Hematology & Oncology / Issue 1/2018
Electronic ISSN: 1756-8722
DOI
https://doi.org/10.1186/s13045-018-0656-7

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