alexa Role of biologic therapy and chemotherapy in hormone receptor- and HER2-positive breast cancer.
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Buzdar AU

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Abstract BACKGROUND: To review the efficacy of chemotherapy and human epidermal growth factor receptor 2 (HER2)-targeted therapy when used in addition to hormonal therapy for the optimal management of estrogen receptor-positive (ER+)/human epidermal growth factor receptor 2-positive (HER2+) breast cancer. DESIGN: Literature published from January 2003 to March 2008 was reviewed to assess the use of chemotherapy and biologic therapy in addition to hormonal agents. RESULTS: Aromatase inhibitors (AIs) demonstrated greater effectiveness in the adjuvant setting than tamoxifen for the management of ER+ and HER2+ breast cancer. Evidence of cross talk between HER2- and ER-signaling pathways suggests that combined treatment with HER2 blockade and hormonal therapy may offer clinical advantages beyond those provided by hormonal therapy alone in ER+/HER2+ disease. Combined therapy with trastuzumab plus an aromatase AI significantly improves progression-free survival, response rates, and clinical benefits when compared with AI monotherapy in postmenopausal women. Several large studies demonstrated that trastuzumab significantly improves disease-free and overall survival when given in combination with, or following, chemotherapy, regardless of hormone receptor status. CONCLUSIONS: HER2-targeted therapy maybe combined with AIs for the treatment of ER+/HER2+ metastatic breast cancer in postmenopausal women. HER2-targeted therapy in combination with AIs for treatment of ER+/HER2+ early breast cancer needs to be prospectively evaluated. This article was published in Ann Oncol and referenced in Journal of Carcinogenesis & Mutagenesis

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