Tumor Biology

, Volume 36, Issue 3, pp 1895–1902 | Cite as

Overexpression of SMARCA5 correlates with cell proliferation and migration in breast cancer

  • Quanxiu Jin
  • Xiaoyun Mao
  • Bo Li
  • Shu Guan
  • Fan Yao
  • Feng Jin
Research Article

Abstract

SMARCA5 partners with RSF-1 to compose the RSF complex, which belongs to the ISWI family of chromatin remodelers. Recent studies referred that SMARCA5 was overexpressed in some malignant tumors. However, expression pattern and biological roles of SMARCA5 in breast cancer have not been examined. In the present study, we found that SMARCA5 was overexpressed in breast cancer specimens by immunohistochemistry. Significant association was observed between SMARCA5 overexpression and TNM stage (p = 0.0199), tumor size (p = 0.0066), high proliferation index (p = 0.0366), and poor overall survival (p = 0.0141). SMARCA5 overexpression also correlated with Rsf-1 expression levels (p = 0.0120). Furthermore, colony formation assay and Matrigel invasion assay showed that knockdown of SMARCA5 expression in MDA-MB-231 and MDA-MB-435s cell lines with high endogenous expression decreased cell proliferation and cell invasion. Flow cytometry showed knockdown of SMARCA5-arrested cell cycle. Further analysis of cell cycle and invasion-related molecules showed that SMARCA5 downregulated cyclin A, MMP2 expression and upregulated p21 expression. In conclusion, our study demonstrated that SMARCA5 was overexpressed in human breast cancers and correlated with poor prognosis. SMARCA5 contributes to breast cancer cell proliferation and invasion.

Keywords

SMARCA5 Proliferation Invasion Breast cancer 

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Quanxiu Jin
    • 1
  • Xiaoyun Mao
    • 1
  • Bo Li
    • 1
  • Shu Guan
    • 1
  • Fan Yao
    • 1
  • Feng Jin
    • 1
  1. 1.Department of Surgical Oncology and Breast SurgeryFirst Affiliated Hospital of China Medical UniversityShenyangChina

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