miRNA-19 promotes non-small-cell lung cancer cell proliferation via inhibiting CBX7 expression

OncoTargets and Therapy. 2018;Volume 11:8865-8874


Journal Homepage

Journal Title: OncoTargets and Therapy

ISSN: 1178-6930 (Online)

Publisher: Dove Medical Press

LCC Subject Category: Medicine: Internal medicine: Neoplasms. Tumors. Oncology. Including cancer and carcinogens

Country of publisher: United Kingdom

Language of fulltext: English

Full-text formats available: PDF, HTML



Peng X

Guan L

Gao B


Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 16 weeks


Abstract | Full Text

Xiaogang Peng, Li Guan, Baoan Gao Department of Respiratory, China Three Gorges University, Yichang Central People’s Hospital, Yichang City, Hubei Province, China Background: miR-19 is a critical carcinogenic miRNA that participates in important biological processes of human malignancies. CBX7 plays a key role in lung cancer development and progression. In the present study, for the first time, we investigated the correlation between miR-19 and CBX7 in non-small-cell lung cancer (NSCLC). Methods: miR-19 expression in NSCLC tissues and lung cancer cell lines was detected using quantitative reverse transcriptase PCR (qRT-PCR). Luciferase reporter assay, qRT-PCR, Western blot, and immunohistochemical assay were conducted to identify the target reaction of miR-19 and CBX7. Moreover, the influence of miR-19 on lung cancer cell proliferation, migration, and invasion was studied including cell counting kit-8 assay, scratch assay, transwell assay, flow cytometry assay, and staining assays. Results: miR-19 was overexpressed in NSCLC tissues and lung cancer cell lines. Luciferase reporter assay demonstrated that miR-19 could inhibit CBX7 expression via binding to the 3'-UTR of CBX7. Furthermore, miR-19 remarkably decreased CBX7 protein and mRNA expression. Additionally, overexpression of miR-19 could significantly enhance lung cancer cell proliferation and migration. Conclusion: miR-19 functions as a tumor accelerator promoting lung cancer cell proliferation through targeting CBX7 and inhibiting its expression. Keywords: miR-19, NSCLC, CBX7, proliferation