CLINICAL TRIAL, PHASE II
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Neoadjuvant dose-dense gemcitabine plus docetaxel and vinorelbine plus epirubicin for operable breast cancer: improved prognosis in triple-negative tumors.

BACKGROUND: Neoadjuvant anti-tumor activity of an alternating taxane- and anthracycline-based dose-dense regimen in patients with operable, non-inflammatory large breast cancer was investigated.

OBJECTIVE: The objective is to study the rate of pathological complete response in patients with breast cancer receiving dose-dense chemotherapy sequentially with gemcitabine plus docetaxel and vinorelbine plus epirubicin.

METHODS: Women (n = 74) with clinical stage II or III breast cancer were enrolled in this open-label, multicenter study to receive six 2-weekly courses of gemcitabine 1000 mg/m2 plus docetaxel 75 mg/m2 on days 1 and 15, and vinorelbine 25 mg/m2 plus epirubicin 100 mg/m2 on days 29 and 43. Patients with an objective response on day 56 then received another cycle of gemcitabine/docetaxel on day 57 and of vinorelbine/epirubicin on day 71. Conservative surgery was scheduled for all patients.

RESULTS: Of the patients enrolled, 30% had triple-negative breast cancer (TNBC). The pathologic complete response (pCR) rate was 22% overall, but was higher in TNBC than patients without TNBC (40.9% vs 14.0%; p = 0.028). Among patients with a pCR, patients with TNBC had similar recurrence-free survival (RFS) and overall survival (OS) to patients without TNBC. Among those without a pCR, RFS rates for patients with TNBC were significantly lower than for patients without TNBC (p = 0.04). The most common severe hematologic toxicity was neutropenia.

CONCLUSIONS: Administering four drugs in a dose-dense alternating sequence gave a high pCR in patients with operable, invasive breast cancer. Patients with TNBC with a pCR had similar OS to patients without TNBC, whereas patients with TNBC without a pCR had poorer survival rate than their non-TNBC counterparts.

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