. . . . . "OSI-7836 is a member of the nucleoside class of cytotoxic drugs of which gemcitabine is the market leader. OSI Pharmaceuticals develops OSI-7836 as a next-generation gemcitabine. The anti-tumor activity of OSI-7836 appeares to be less schedule dependent than gemcitabine. It is also more active than ara-C (another clinically used nucleoside analog) in all nine models and more active than either paclitaxel or cisplatin in the two lung xenograft models tested. This drug shows no unexpected toxicities; those observed appeared to be similar to other nucleoside agents. "@en . . . . . . . "investigational"@en . . . . . . . "OSI-7836 appears to have a different mechanism of tumor growth inhibition blocking the cell division cycle at a different point (the G2 phase) than gemcitabine. The mechanism of action involves phosphorylation to the triphosphate form followed by incorporation into cellular DNA, leading to cell death."@en . . "OSI-7836"@en . . . . . "# Richardson F, Black C, Richardson K, Franks A, Wells E, Karimi S, Sennello G, Hart K, Meyer D, Emerson D, Brown E, LeRay J, Nilsson C, Tomkinson B, Bendele R: Incorporation of OSI-7836 into DNA of Calu-6 and H460 xenograft tumors. Cancer Chemother Pharmacol. 2005 Mar;55(3):213-21. Epub 2004 Nov 16. \"Pubmed\":http://www.ncbi.nlm.nih.gov/pubmed/15592840 # Roy AM, Tiwari KN, Parker WB, Secrist JA 3rd, Li R, Qu Z: Antiangiogenic activity of 4'-thio-beta-D-arabinofuranosylcytosine. Mol Cancer Ther. 2006 Sep;5(9):2218-24. \"Pubmed\":http://www.ncbi.nlm.nih.gov/pubmed/16985055"@en . . . . "Investigated for use/treatment in solid tumors."@en . . . .