NCIt definition : A synthetic oligodeoxynucleotide. Functioning as an anti-sense agent, it hybridizes
to the translation initiation region of the human mRNA for the oncogene H-Ras. ISIS
2503 selectively inhibits the expression of H-Ras, and may inhibit the growth of some
Ras-dependent tumor cells. (NCI04);
Alternative definition : NCI-GLOSS: A substance that is being studied in the treatment of cancer.;