Author:
Dent S.,Verma Sh.,Latreille J.,Rayson D.,Clemons M.,Mackey J.,Verma Su.,Lemieux J.,Provencher L.,Chia S.,Wang B.,Pritchard K.
Abstract
The role of targeted therapies in the treatment of women with breast cancer has been rapidly evolving. Trastuzumab, a monoclonal antibody against the human epidermal growth factor receptor 2 (her2), was the first her2-targeted therapy that clearly demonstrated a significant clinical benefit for women with her2-overexpressing metastatic breast cancer (mbc). However, in recent years it has become increasingly apparent that, when trastuzumab is used in the first-line setting in combination with chemotherapy, most women eventually develop progressive disease. Determining the treatment options available to women who have progressed while on trastuzumab therapy has been hampered by a paucity of high-quality published data. In addition, with the standard use of trastuzumab in the adjuvant setting (for eligible her2-positive patients), the role of anti-her2 agents for patients who experience a breast cancer relapse has become a clinically relevant question. This manuscript reviews current available data and outlines suggestions from a panel of Canadian oncologists about the use of trastuzumab and other her2-targeted agents in two key mbc indications: (1) Treatment for women with her2-positive mbc progressing on trastuzumab (that is, treatment beyond progression); (2) Treatment for women with her2-positive mbc recurring following adjuvant trastuzumab (that is, re-treatment). The suggestions set out here will continue to evolve as data and future trials with trastuzumab and other her2-targeted agents emerge.
Cited by
13 articles.
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