Laboratory Medicine ›› 2017, Vol. 32 ›› Issue (7): 590-596.DOI: 10.3969/j.issn.1673-8640.2017.07.008

• Orginal Article • Previous Articles     Next Articles

Analysis of 21-gene recurrence score in 459 patients with breast cancer

LIN Jiafei1, WU Jiayi2, CAI Gang1, WU Beiying1, LIN Lin1   

  1. 1. Department of Clinical Laboratory,Ruijin Hospital,Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
    2. Breast Health Center,Ruijin Hospital,Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
  • Received:2017-03-01 Online:2017-08-08 Published:2017-08-09

Abstract:

Objective To investigate the distribution characteristics of 21-gene recurrence score and its correlation with clinicopathologic characteristic in breast cancer patients,and to evaluate the role in the choice of adjuvant chemotherapy. Methods A total of 459 patients with breast cancer were enrolled,who are with positive estrogen receptor(ER) and negative human epidermal growth factor receptor 2(HER2). RNA was extracted from the paraffin specimens of patients. Real-time fluorescence polymerase chain reaction (PCR) was used to determine the expression of 21-gene,and recurrence score was calculated. According to recurrence score,the patients were classified into low,intermediate and high risk groups. The relationship with clinicopathologic characteristic and the choice of adjuvant chemotherapy in recurrence score groups were evaluated. Multivariate Logistic regression analysis was used to analyze the influence factors for recurrence score. Results Among the 459 patients with breast cancer,there were 117 patients (25.5%) in low risk group,254 patients (55.3%) in intermediate risk group and 88 patients (19.2%) in high risk group. There was statistical significance in tumor grade,type,progestin receptor(PR) status and Ki67 expression among recurrence score groups(P<0.05). Multivariate Logistic regression analysis showed that PR status and tumor grade were influence factors for recurrence score. There were differences in the proportions of receiving adjuvant chemotherapy among recurrence score groups(P<0.05). Conclusions Recurrence score can effectively integrate some important conventional clinical and pathological indicators,and provide more information. Recurrence score can also support the choice of adjuvant chemotherapy.

Key words: 21-Gene, Recurrence score, Clinicopathologic characteristic, Adjuvant chemotherapy, Breast cancer

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