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Tumor Biology

, Volume 37, Issue 7, pp 9311–9322 | Cite as

SET7/9 inhibits oncogenic activities through regulation of Gli-1 expression in breast cancer

  • Yongchun Song
  • Jianli Zhang
  • Tao Tian
  • Xiao Fu
  • Wenjuan Wang
  • Suoni Li
  • Tingting Shi
  • Aili Suo
  • Zhiping Ruan
  • Hui Guo
  • Yu Yao
Original Article

Abstract

SET7/9 is a protein lysine methyltransferase that had been initially identified as a histone lysine methyltransferase which generates monomethylation at histone 3 lysine 4. Different functions were attributed to the protein methylation mediated by SET7/9. In this study, we found that the expression of SET7/9 declined in a majority of the human breast cancer tissues examined compared with normal tissues. Knockdown of SET7/9 promoted the proliferation, migration, and invasion of breast cancer cells. Knockdown of SET7/9 also increased the tumorigenicity of breast cancer cells in vivo. On the contrary, overexpression of SET7/9 in breast cancer cells inhibited these processes. Microarray analysis indicated that Gli-1 may play function as a downstream factor of SET7/9. Overexpression of SET7/9SET7/9 inhibits Gli-1 expression. While knockdown of SET7/9 promotes the expression of Gli-1. Gli-1 inhibited by cyclopamine blocked knockdown SET7/9-driven proliferation, migration, and invasion in breast cancer cell. Furthermore, Gli-1 expression in human breast cancer tissues is negatively correlated with SET7/9 expression. Together, these results helped to realize the antioncogene functions of SET7/9 in breast cancer cells and provided a novel direction to treat breast cancer.

Keywords

SET7/9 Breast cancer Gli-1 Proliferation 

Notes

Acknowledgments

The present study was supported by the Scientific and technological research projects of Shaanxi (Grant no. 2013 K12-12-03)

Compliance with ethical standards

This study was approved by the ethics committee of First Affiliated Hospital of Xi’an Jiaotong University.

Conflicts of interest

None

Supplementary material

13277_2016_4822_Fig10_ESM.jpg (454 kb)
Supplemental Figure 1

Expression of SET7/9 mRNA was down-regulated in breast cancer tissues. SET7/9 mRNA expreession was analyze by qRT-PCR on breast cancer tissue samples from 79 patients. (JPG 453 kb)

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2016

Authors and Affiliations

  • Yongchun Song
    • 1
  • Jianli Zhang
    • 2
  • Tao Tian
    • 3
  • Xiao Fu
    • 3
  • Wenjuan Wang
    • 3
  • Suoni Li
    • 4
  • Tingting Shi
    • 3
  • Aili Suo
    • 3
  • Zhiping Ruan
    • 3
  • Hui Guo
    • 3
  • Yu Yao
    • 3
  1. 1.Department of Oncological SurgeryFirst Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina
  2. 2.Department of General SurgeryThe Center Hospital of Xi’anXi’anChina
  3. 3.Department of OncologyFirst Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina
  4. 4.Department of OncologyShaanxi Province Tumor HospitalXi’anChina

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