The Oncologist, Vol. 11, No. 9, 1018-1024, October 2006; doi:10.1634/theoncologist.11-9-1018 © 2006 AlphaMed Press
Novel Therapeutic Developments Other Than EGFR and VEGF Inhibition in Colorectal CancerCentre for Cancer Research and Cell Biology, Queens University, Belfast, Northern Ireland, United Kingdom Key Words. Colorectal cancer • OSI-7904L • Pemetrexed • NB1011 Correspondence: Richard H. Wilson, M.D., Centre for Cancer Research and Cell Biology, Queens University Belfast, Belfast BT9 7AB, Northern Ireland, UK. Telephone: +44 (0)28 9026 3541; Fax: +44 (0)28 9026 3744; e-mail: r.wilson{at}qub.ac.uk
Developments that may improve existing cytotoxic therapy for colorectal cancer (CRC) include alternatives to 5-fluorouracil (5-FU) such as the liposomal Thymidylate Synthase inhibitor OSI-7904L and the multitargeted antifolate pemetrexed. Studies have explored means of reformulating irinotecan, modulating its pharmacokinetics, and enhancing its activity by maximizing DNA damage through poly(ADP-ribose) polymerase inhibition. Cell cycle inhibitors may offer an alternative to combination with 5-FU. However, as standard regimens become more complex, so do the clinical trials needed to develop new agents, and the path to registration becomes ever more tortuous. It is therefore likely that several drugs with promise in CRC will not be developed for this indication.
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