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The Oncologist, Vol. 13, No. 1, 39-50, January 2008; doi:10.1634/theoncologist.2006-0049
© 2008 AlphaMed Press

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Gastrointestinal Cancer

Synergy Between Cetuximab and Chemotherapy in Tumors of the Gastrointestinal Tract

Reshma L. Mahtania, John S. Macdonaldb

aSt. Vincent's Comprehensive Cancer Center, New York, New York, USA; bAptium Oncology Inc., Los Angeles, California, USA

Key Words. Cetuximab • Colorectal cancer • EGFR • Chemotherapy

Correspondence: Correspondence: Reshma L. Mahtani, D.O., Lynn Cancer Institute–West Campus, 21020 State Road 7, Boca Raton, Florida 33428, USA. Telephone: 561-883-7471; Fax: 561-218-6300; e-mail: rmahtani{at}aptiumoncology.com

Disclosure: J.S.M. has acted as a consultant for Bristol Myers Squibb and ImClone. No other potential conflicts of interest were reported by the authors, planners, reviewers, or staff managers of this article.

Cetuximab is a recently approved monoclonal antibody that targets the epidermal growth factor receptor, a receptor tyrosine kinase involved in the development and progression of colorectal cancer (CRC) and other solid tumors. Cetuximab, as a single agent or in combination with chemotherapy, has demonstrated significant clinical efficacy against CRC. Combinations of cetuximab with chemotherapy have proven to be well tolerated, with minimal overlap of toxicities between agents; and the anticancer synergy between cetuximab and traditional chemotherapy agents has made cetuximab a vital treatment for patients who are no longer responsive to chemotherapy alone. The U.S. Food and Drug Administration approved cetuximab in combination with irinotecan for the treatment of irinotecan-refractory metastatic CRC or as monotherapy for treating patients intolerant to irinotecan. Combination chemotherapies involving cetuximab as well as combinations involving cetuximab and other targeted agents, such as bevacizumab, an anti–vascular endothelial growth factor monoclonal antibody, constitute powerful new treatment options for the management of CRC. This review discusses recent clinical studies that have further defined this synergy, focusing primarily on tumors of the gastrointestinal tract.






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