Recently identified and potential targets for colon cancer treatment.

The systemic therapy for colorectal cancer has advanced from essentially a single, partially effective agent, 5-fluorouracil, to a combination of cytotoxics and antibodies offering increased survival. In addition to damage of DNA through agents, such as oxaliplatin and irinotecan, and inhibition of DNA replication, a promising approach involves modifying the control of gene expression, including epigenetic control. Modulation of invasion and metastasis should become increasingly important. Inhibition of growth-factor signaling with small-molecule drugs and antibodies can be a part of this effort. Further progress in the control of gene expression in colon cancer may be achieved with miRNAs and RNA interference if technical problems can be overcome. A number of genetic changes in colorectal cancer progression have been identified and offer targets for future therapy.