Volume 57, Issue 7 pp. 842-853
RESEARCH ARTICLE

Downregulation of miR-3127-5p promotes epithelial-mesenchymal transition via FZD4 regulation of Wnt/β-catenin signaling in non-small-cell lung cancer

Yang Yang

Yang Yang

Department of Thoracic Surgery, Huadong Hospital Affiliated to FuDan University, Shanghai, China

Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China

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Yifeng Sun

Yifeng Sun

Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China

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Yun Wu

Yun Wu

Department of Thoracic Surgery, Huadong Hospital Affiliated to FuDan University, Shanghai, China

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Dongfang Tang

Dongfang Tang

Department of Thoracic Surgery, Huadong Hospital Affiliated to FuDan University, Shanghai, China

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Xi Ding

Xi Ding

Central Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China

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Wen Xu

Wen Xu

Central Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China

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Bo Su

Corresponding Author

Bo Su

Central Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China

Correspondence

Wen Gao, Department of Thoracic Surgery, Huadong Hospital Affiliated to FuDan University, No. 221, Yananxi Road, Shanghai, 200040, China.

Email: [email protected]

Bo Su, Central Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No. 507, Zhengmin Road, Shanghai, 200433, China.

Email: [email protected]

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Wen Gao

Corresponding Author

Wen Gao

Department of Thoracic Surgery, Huadong Hospital Affiliated to FuDan University, Shanghai, China

Correspondence

Wen Gao, Department of Thoracic Surgery, Huadong Hospital Affiliated to FuDan University, No. 221, Yananxi Road, Shanghai, 200040, China.

Email: [email protected]

Bo Su, Central Laboratory, Shanghai Pulmonary Hospital, Tongji University School of Medicine, No. 507, Zhengmin Road, Shanghai, 200433, China.

Email: [email protected]

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First published: 22 March 2018
Citations: 35

Abstract

MiR-3127-5p has been implicated as a tumor-suppressive microRNA (miRNA) in non-small-cell lung cancer (NSCLC) and its expression was associated with tumor recurrence and poor prognosis. The aim of this study was to determine whether miR-3127-5p regulates epithelial-mesenchymal transition (EMT) in NSCLC, and to investigate the underlying mechanisms. Using qRT-PCR, we examined the expression levels of miR-3127-5p in a cohort of primary NSCLC specimens with and without distant metastasis. We further performed a series of in vitro and in vivo experiments to investigate the effects and underlying mechanism of miR-3127-5p on EMT, cell migration, invasion, and adhesion in NSCLC. We found that metastatic NSCLC tissues showed markedly downregulated miR-3127-5p expression. Transforming growth factor-β1 (TGF-β1) treatment induced EMT in A549 and H1299 cells, and downregulation of miR-3127-5p could result in the similar effect. Mechanically, we demonstrated that frizzled-4 (FZD4) is a target gene and miR-3127-5p exerts its effects by regulating the Wnt/β-catenin signaling. In addition, the expression levels of FZD4 and miR-3127-5p were also negatively associated in both clinical and xenografted tumors. Overall, these findings suggest that downregulation of miR-3127-5p promotes EMT through activating the Wnt/FZD4/β-catenin signaling pathway and may represent a therapeutic target for NSCLC metastasis.

CONFLICTS OF INTEREST

The authors declare that there is no conflict of interest in this work.

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