• Ali McBride and Sara K Butler.
• Arthur G. James Cancer Hospital, Richard J. Solove Research Institute, The Ohio State University, Columbus, 43212, USA. alimcbride@gmail.com
• Am J Health Syst Pharm. 2012 May 1; 69 (9): 745-55.

PurposeThe pharmacology, pharmacokinetics, clinical efficacy, safety, and administration of eribulin in patients with metastatic breast cancer are reviewed.SummaryClassical chemotherapeutic agents for breast cancer have dominated treatment regimens even in the era of targeted therapy. Disease progression through these agents is often due to the development of resistance or lack of efficacy with these agents. Recently, a new nontaxane agent, eribulin mesylate, was approved for the treatment of metastatic breast cancer in patients who have received at least two prior chemotherapeutic agents. Eribulin is a member of a new class of synthetic cytotoxic agents derived from the Japanese sea sponge Halichondria okadai. Eribulin differs from other antimicrotubule agents in that it can bind to the microtubule cap and inhibit tubulin polymerization, leading to microtubule arrest. In Phase II clinical trials, eribulin demonstrated activity in extensively pretreated patients who had previously received an anthracycline, taxane, and capecitabine and had shown disease progression within the last six months of treatment. In a pivotal Phase III clinical trial of heavily pre-treated patients, patients who received eribulin versus the physician's treatment of choice showed a significant increase in overall and progression-free survival. Eribulin has a manageable adverse-effect profile, consisting mainly of neutropenia and fatigue. Eribulin has been associated with a low incidence of peripheral neuropathy.ConclusionEribulin, a novel synthetic antimicrotubule agent that binds to the vinca domain of tubulin and inhibits the polymerization of tubulin, offers a new treatment option for metastatic breast cancer or locally advanced breast cancer.

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