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Clinical Implications of p57KIP2 Expression in Breast Cancer

  • Xu, Xiao-Yin (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Wang, Wen-Qian (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Zhang, Lei (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Li, Yi-Ming (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Tang, Miao (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Jiang, Nan (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Cai, Shou-Liang (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Wei, Liang (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Jin, Feng (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University) ;
  • Chen, Bo (Department of Surgical Oncology and Department of Breast Surgery, the First Hospital of China Medical University)
  • 발행 : 2012.10.31

초록

Objective: To study the relationship between expression of $p57^{KIP2}$ and prognosis and other clinicopathological parameters in invasive breast cancers. Methods: We assessed the expression of $p57^{KIP2}$ in 89 cases of invasive breast cancer and 20 cases of normal breast tissue by immunohistochemical methods and analyzed the results with SPSS software (ver. 16.0). Result: The positive expression rates of $p57^{KIP2}$ protein in the invasive breast cancers and surrounding normal tissue were 30.3% (27/89) and 65% (13/20), respectively. Cases with no $p57^{KIP2}$ expression exhibited a significantly higher post-operative distant metastasis rate than those with $p57^{KIP2}$ expression (37.9% vs. 14.8%; P = 0.01). DFS analysis showed that $p57^{KIP2}$-/C-erbB-2+ tumors also exhibited a significantly higher post-operative distant metastasis rate than the other groups (66.7% vs. 29.2%; P = 0.007), as did $p57^{KIP2}$-/p53+ tumors (64.3% vs. 22.7%; P = 0.001). Survival analysis revealed that $p57^{KIP2}$ was associated with breast cancer-specific survival overall (P = 0.045, log-rank test). Subgroup analysis demonstrated that individuals with $p57^{KIP2}$-/C-erbB-2+tumors experienced significantly worse post-operative survival than those with $p57^{KIP2}$-/C-erbB-2- or other tumors (P = 0.006, log-rank test). $p57^{KIP2}$-/p53+ tumors were associated with significantly worse post-operative survival than $p57^{KIP2}$-/p53- or other tumors (P = 0.001, log-rank test). Cox regression analysis showed that $p57^{KIP2}$ was a non-independent prognostic factor for breast cancer (P = 0.303). Conclusions: $p57^{KIP2}$ is expressed at low levels in invasive breast cancer and is associated with better overall survival rate and disease-free survival in breast cancer patients, but it was a non-independent prognostic factor for breast cancer. Thus, the connection between $p57^{KIP2}$/p53 and $p57^{KIP2}$/C-erbB-2 may provide biomarkers for breast cancer.

키워드

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