Predictive Value of Circulating Tumor Cells for Evaluating Short- and Long-Term Efficacy of Chemotherapy for Breast Cancer
2017
BACKGROUND The present study investigated the role of
circulating tumor cells(CTCs)
countsin predicting the short- and long-term efficacy of
chemotherapyfor breast cancer (BC). MATERIAL AND METHODS Peripheral venous blood was extracted from 187 BC patients. CTCs were measured by flow cytometry. Spearman's correlation analysis was performed to examine the correlation between the efficacy of
chemotherapyand CTC
counts. A receiver operating characteristic (ROC) curve was plotted to estimate the predictive value of CTC
counts. The Kaplan-Meier method was employed to calculate disease-free survival (DFS) and overall survival (OS). Cox regression analysis was used to determine risk factors for prognosis of BC. RESULTS Complete response (CR) + partial response (PR) was achieved by 65.8% of BC patients. After
chemotherapy, CTC
countswere decreased in both the CR + PR and SD + PD groups. Spearman's correlation analysis indicated that CTC
countsbefore
chemotherapywere positively correlated with clinical response to
chemotherapy(r=0.45, P<0.05). For predicting clinical response to
chemotherapy, CTC
countsyielded an area under the curve (AUC) of 0.958, with sensitivity reaching 96.9% and specificity reaching 85.4%. The Kaplan-Meier method and Cox regression analysis indicated that tumor node metastasis (TNM) staging, lymph node metastasis (LNM), ki-67, endocrine therapy, and CTC
countswere risk factors for prognosis of BC. CONCLUSIONS These findings indicate that BC patients with CTCs ³8 exhibited poor response to
chemotherapyand poor OS. CTC
countscan serve as an indicator in predicting short- and long-term efficacy of
chemotherapyfor BC.
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