Structural Maintenance of Chromosomes 4 is a Predictor of Survival and a Novel Therapeutic Target in Colorectal Cancer

  • Feng, Xiao-Dong (Department of Basic Medicine, Taishan Medical University) ;
  • Song, Qi (Department of Basic Medicine, Taishan Medical University) ;
  • Li, Chuan-Wei (Department of Basic Medicine, Taishan Medical University) ;
  • Chen, Jian (Department of General Surgery, Shanghai Jiaotong University Affiliated First People's Hospital) ;
  • Tang, Hua-Mei (Department of Pathology, Shanghai Jiaotong University Affiliated First People's Hospital) ;
  • Peng, Zhi-Hai (Department of General Surgery, Shanghai Jiaotong University Affiliated First People's Hospital) ;
  • Wang, Xue-Chun (Department of Basic Medicine, Taishan Medical University)
  • Published : 2014.11.28


Background: Structural maintenance of chromosomes 4 (SMC-4) is a chromosomal ATPase which plays an important role in regulate chromosome assembly and segregation. However, the role of SMC-4 in the incidence of malignancies, especially colorectal cancer is still poorly understood. Materials and Methods: We here used quantitative PCR and Western blot analysis to examine SMC-4 mRNA and protein levels in primary colorectal cancer and paired normal colonic mucosa. SMC-4 clinicopathological significance was assessed by immunohistochemical staining in a tissue microarray (TMA) in which 118 cases of primary colorectal cancer were paired with noncancerous tissue. The biological function of SMC-4 knockdown was measured by CCK8 and plate colony formation assays. Fluorescence detection has been used to detect cell cycling and apoptosis. Results: SMC-4 expression was significantly higher in colorectal cancer and associated with T stage, N stage, AJCC stage and differentiation. Knockdown of SMC-4 expression significantly suppressed the proliferation of cancer cells and degraded its malignant degree. Conclusions: Our clinical and experimental data suggest that SMC-4 may contribute to the progression of colorectal carcinogenesis. Our study provides a new therapeutic target for colorectal cancer treatment.


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