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The Oncologist, Vol. 10, No. 4, 250-261, April 2005; doi:10.1634/theoncologist.10-4-250
© 2005 AlphaMed Press

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Critical Evaluation of Current Treatments in Metastatic Colorectal Cancer

Alan Venook

Division of Medical Oncology, Clinical Research Office, University of California Cancer Center, San Francisco, California, USA

Correspondence: Alan Venook, M.D., Division of Medical Oncology, Clinical Research Office, University of California Cancer Center, Box 1705, 1600 Divisadero, San Francisco, California 94115-1705, USA. Telephone: 415-353-9888; Fax: 415-353-9959; e-mail: venook{at}cc.ucsf.edu

Fluorouracil (FU) has been the mainstay of treatment for metastatic colorectal cancer (mCRC) for many years. However, in recent years, newer chemotherapeutic agents, particularly irinotecan (Campostar®; Pfizer Pharmaceuticals, New York, NY, http://www.pfizer.com) and more recently oxaliplatin (Eloxatin®; Sanofi-Aventis Inc., New York, NY, http://www.sanofi-aventis.com), have been shown to improve survival in combination with FU-based therapies. These agents were therefore incorporated into first- and second-line treatment strategies. The development of targeted agents that are tumor specific with better toxicity profiles than chemotherapeutic agents has widened the spectrum of therapies for this disease. The U.S. Food and Drug Administration (FDA) recently approved two targeted agents for treating mCRC: an antivascular endothelial growth factor monoclonal antibody (mAb), bevacizumab (Avastin®; Genentech, Inc., South San Francisco, CA, http://www.gene.com), in combination with first-line 5-FU-based chemotherapy regimens and the human epidermal growth factor receptor (HER-1/EGFR)-targeted mAb cetuximab (Erbitux®; ImClone Systems, Inc., New York, NY, http://www.imclone.com) as monotherapy or in combination with irinotecan as second-line therapy in refractory cancer. These newer, more effective agents are improving clinical outcome for patients with mCRC. However, as the number of agents has increased, choosing the most effective treatment strategy has become increasingly complex. This review discusses the role of the individual agents in the treatment of mCRC and identifies the most effective regimens.

Key Words. Fluorouracil • Irinotecan • Oxaliplatin • Bevacizumab • Cetuximab • Vascular endothelial growth factor • VEGF




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