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MiR-451 Suppresses Cell Proliferation and Metastasis in A549 Lung Cancer Cells

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Abstract

Recent study showed that inflammation was related to lung cancer. However, the exact cause of lung inflammation leading to carcinogenesis is unknown. MicroRNAs (miRNAs) are a group of endogenous non-coding small RNAs that regulate the activity of targeted mRNAs by inflammatory response in many diseases. MiR-451 was reported to relate to the development of lung cancer and metastasis of glioma. But the effect of miR-451 on cell proliferation, migration, and invasion of lung cancer is not really clear. In order to explore the molecular mechanism of the occurrence and development of lung cancer, we investigated the effect of human miR-451 on the proliferation, invasion, and metastasis in lung cancer cell line A549. The miR-451 expression construct was generated into pGenesil-1.1 and transfected into A549 cells. Results showed that the recombinant vectors were verified by sequencing. And miR-451 was over-expressed in A549 by real-time RT PCR. Furthermore, the proliferation, invasion, and metastasis of the cells in miR-451 group were inhibited significantly compared with those in control and A549 groups by MTT assay, Transwell invasion assay, and wound-healing assay. And the lung cancer metastasis factors (MMP-2, MMP-9, VEGF, and CXCR4) were decreased in miR-451 group by Western blot. Moreover, it was proved that inflammation-related gene-PSMB8 was a target for miR-451 by bioinformatics analysis and dual-luciferase reporter assay. And the protein expressions of PSMB8 and NOS2 were decreased in miR-451 group compared with those in control and A549 groups. Therefore, our findings indicated that miR-451 related to PSMB8/NOS2 inflammatory factors may suppress the development and migration of lung cancer, providing evidence for the role of miR-451 in lung cancer.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (81270912) and the project of Science and Technology Commission Foundation of Chongqing Province (cstc2013jcyjA10044).

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The authors declare no conflict of interest.

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Authors and Affiliations

  1. Molecular Medicine and Cancer Research Center, Chongqing Medical University, No.1, Medical College Road, Chongqing, 400016, China

    Pin Yin, Rui Peng, Huimin Peng, Li Yao, Yan Sun, Li Wen, Tianhui Wu, Ji Zhou & Zheng Zhang

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  1. Pin Yin
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  3. Huimin Peng
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  4. Li Yao
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Correspondence to Zheng Zhang.

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Pin Yin and Rui Peng are co-first authors.

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Yin, P., Peng, R., Peng, H. et al. MiR-451 Suppresses Cell Proliferation and Metastasis in A549 Lung Cancer Cells. Mol Biotechnol 57, 1–11 (2015). https://doi.org/10.1007/s12033-014-9796-3

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