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MicroRNA-486-5p targeting PIM-1 suppresses cell proliferation in breast cancer cells

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Tumor Biology

Abstract

MicroRNAs (miRNAs) are emerging as critical regulators in carcinogenesis and tumor progression. Recently, miR-486-5p has been proved to play an important role in several cancers, but its functions in the context of breast cancer (BC) remain unknown. In this study, we found that miR-486-5p expression is significantly downregulated in BC tissues and cell lines. Overexpression of miR-486-5p dramatically suppressed BC cell proliferation in vitro and in vivo, induced G0/G1 arrest, and promoted apoptosis. We subsequently identified the oncogene PIM-1 as a direct target of miR-486-5p in BC. Overexpression of PIM-1 attenuated the function of miR-486-5p in BC cells. Together, we conclude that miR-486-5p exerts its antiproliferative function by directly downregulating PIM-1 expression. This novel miR-486-5p/PIM-1 axis provides insight into the pathogenesis of BC and might be therapeutic targets for prevention or treatment of BC.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (nos. 30973932 and 81173601) and Binzhou Science and Technology Development Plan (no. 2013ZC1708).

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Authors and Affiliations

  1. Department of Thyroid and Breast Surgery, Affiliated Hospital of Binzhou Medical College, Binzhou, 256603, China

    Guoqiang Zhang, Xiaohong Wang & Zhenlin Yang

  2. Department of Hematology, Affiliated Hospital of Binzhou Medical College, Binzhou, 256603, China

    Zengyan Liu

  3. Department of Ultrasonic Medicine, Affiliated Hospital of Binzhou Medical College, Binzhou, 256603, China

    Guanghe Cui

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  1. Guoqiang Zhang
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  2. Zengyan Liu
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  3. Guanghe Cui
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  4. Xiaohong Wang
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  5. Zhenlin Yang
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Corresponding author

Correspondence to Zhenlin Yang.

Additional information

Guoqiang Zhang and Zengyan Liu contributed equally to this work.

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Zhang, G., Liu, Z., Cui, G. et al. MicroRNA-486-5p targeting PIM-1 suppresses cell proliferation in breast cancer cells. Tumor Biol. 35, 11137–11145 (2014). https://doi.org/10.1007/s13277-014-2412-0

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  • DOI: https://doi.org/10.1007/s13277-014-2412-0

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