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Tumor Biology

, Volume 36, Issue 11, pp 8697–8702 | Cite as

MiR-503 inhibited cell proliferation of human breast cancer cells by suppressing CCND1 expression

  • Jianting Long
  • Caiwen Ou
  • Haoming Xia
  • Yifan Zhu
  • Dayue Liu
Research Article

Abstract

Breast cancer is one of the most common malignancies and a major cause of cancer-related mortality all over the world. A growing body of reports revealed that microRNAs play essential roles in the progression of cancers. Aberrant expression of miR-503 has been reported in several kinds of cancer. The aim of the current study was to elucidate the role of miR-503 in the pathogenesis of breast cancer. In the present study, our results suggested that miR-503 expression was markedly downregulated in breast cancer tissues and cells. Overexpression of miR-503 in breast cancer cell lines reduced cell proliferation through inducing G0/G1 cell cycle arrest by targeting CCND1. Together, our findings provide new knowledge regarding the role of miR-503 in the progression of breast cancer and indicate the role of miR-503 as a tumor suppressor microRNA (miRNA) in breast cancer.

Keywords

miR-503 Breast cancer CCND1 Cell proliferation Cell cycle 

Notes

Acknowledgments

This work was supported by Science and Technology Planning Project of Guangdong Province (2012B031800055) and National Natural Science Foundation of China (31400858). All authors designed the study together, performed the experiment together, analyzed the data, and wrote the paper; all authors approved the final manuscript.

Conflicts of interest

None

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Jianting Long
    • 1
  • Caiwen Ou
    • 2
  • Haoming Xia
    • 3
  • Yifan Zhu
    • 3
  • Dayue Liu
    • 3
  1. 1.Department of Medicinal Oncology, the First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina
  2. 2.Key Laboratory of Construction and Detection of Guangdong ProvinceSouthern Medical UniversityGuangzhouChina
  3. 3.Breast Disease Center, Department of Surgery, the First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina

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