DOI QR코드

DOI QR Code

Quantitative Measurement of Serum MicroRNA-21 Expression in Relation to Breast Cancer Metastasis in Chinese Females

  • Wang, Guinian (Department of Laboratory Medicine, The First Hospital of Zibo City) ;
  • Wang, Longzi (Department of Pharmacy, Zibo Vocational Institute) ;
  • Sun, Sijing (Department of Surgical Medicine, The First Hospital of Zibo City) ;
  • Wu, Juan (Department of Laboratory Medicine, The First Hospital of Zibo City) ;
  • Wang, Qinglu (Key Laboratory of Biomedical Engineering, Shandong Wanjie Medical College)
  • 투고 : 2014.08.04
  • 심사 : 2014.12.29
  • 발행 : 2015.03.02

초록

Background: Breast cancer is the most common type of cancer in females. Aberrant expression of microRNA-21 (miR-21) has previously been reported in breast cancer tissue. The aim of this study was to investigate expression levels of serum miR-21 in breast cancer patients and evaluate its prognostic value in Chinese females. Methods: Real-time quantitative (RQ)-PCR was used to analyze miR-21 expression in archived serum, tumor tissue, and adjacent normal tissue from 549 participants (326 with breast cancer, 223 without breast cancer). We also analyzed associations between serum miR-21 expression and breast cancer subtypes and patient prognosis. Recurrence and survival were analyzed by using the multivariate Cox proportional hazards model. Results: Expression of miR-21 was significantly higher in breast cancer tissues compared with normal adjacent breast tissues (P<0.001). The $2^{-{\Delta}{\Delta}Ct}$ values for serum miR-21 in breast cancer patients versus healthy controls were $9.12{\pm}3.43$ and $2.96{\pm}0.73$, respectively. Multivariate Cox proportional hazards model suggested that serum miR-21 expression was an independent poor prognostic factor for both recurrence (hazard ratio [HR]=2.942; 95% confidence interval [CI]=1.420-8.325; P=0.008) and disease-free survival (HR=2.732; 95% CI=1.038-7.273, P=0.003) in breast cancer. Conclusions: Increased serum miR-21 expression level was correlated with poor prognosis of breast cancer patients, indicating that serum miR-21 may be a novel prognostic marker for recurrence and survival of breast cancer patients before resection.

키워드

과제정보

연구 과제 주관 기관 : First Hospital of Zibo City, Natural Scientific Foundation of Shandong Province

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