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  • Title: Paclitaxel, carboplatin, and trastuzumab in a neo-adjuvant regimen for HER2-positive breast cancer.
    Author: Sonke GS, Mandjes IA, Holtkamp MJ, Schot M, van Werkhoven E, Wesseling J, Vrancken Peeters MJ, Rodenhuis S, Linn SC.
    Journal: Breast J; 2013; 19(4):419-26. PubMed ID: 23682812.
    Abstract:
    To evaluate a nonanthracycline-containing regimen consisting of 24 weekly administrations of paclitaxel, carboplatin, and trastuzumab as neo-adjuvant therapy for human epidermal growth factor receptor 2 (HER2)-positive breast cancer. Patients with stage II or III breast cancer, including inflammatory disease, with HER2 overexpression (immunohistochemistry and/or fluorescent in situ hybridization) were treated with 24 weekly administrations of paclitaxel 70 mg/m(2) , carboplatin AUC = 3 mg/mL/minute, and trastuzumab 2 mg/kg (loading dose 4 mg/kg). In cycles 7, 8, 15, 16, 23, and 24, only trastuzumab was given. The primary end point was pathologic complete response (pCR) in both breast and axilla. Of 61 evaluable patients, 61% had stage II disease and 75% were node-positive. The median NRI (Neoadjuvant Response Index, a measure of the degree of downstaging by chemotherapy) of all patients was 0.86. Twenty-seven (44%) had a NRI of 1.0, which corresponds to pCR in breast and lymph nodes. The most commonly reported grade 3/4 toxicities were neutropenia (72%) and thrombocytopenia (36%). Dose reduction was necessary in 51% of the patients. A weekly carboplatin-paclitaxel-trastuzumab neo-adjuvant regimen is highly active in HER2-positive breast cancer with an acceptable toxicity profile. A multicenter phase 2 trial has recently reached its accrual target and will serve as a basis for a subsequent randomized phase 3 study comparing this regimen to a similar regimen preceded by anthracyclines.
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