Synthesis, Biochemical, and Cellular Evaluation of Farnesyl Monophosphate Prodrugs as Farnesyltransferase Inhibitors
摘要:
Certain farnesyl diphosphate (FPP) analogs are potent inhibitors of the potential anticancer drug target protein farnesyltransferase (FTase), but these compounds are not suitable as drug candidates. Thus, phosphoramidate prodrug derivatives of the monophosphate precursors of FPP-based FTase inhibitors have been synthesized. The monophosphates themselves were significantly more potent inhibitors of FTase than the corresponding FPP analogs. The effects of the prodrug 5b (a derivative of 3-allylfarnesyl monophosphate) have been evaluated on prenylation of RhoB and on the cell cycle in a human malignant schwannoma cell line (STS-26T). In combination treatments, 1-3 mu M 5b plus 1 mu M lovastatin induced a significant inhibition of RhoB prenylation, and a combination of these drugs at 1 mu M each also resulted in significant cell cycle arrest in G(1). Indeed, combinations as low as 50 nM lovastatin + 1 mu M 5c or 250 nM lovastatin + 50 nM 5c were highly cytostatic in STS-26T cell culture.
Grignard-mediated synthesis and preliminary biological evaluation of novel 3-substituted farnesyl diphosphate analogues
作者:Todd J. Zahn、Carolyn Weinbaum、Richard A. Gibbs
DOI:10.1016/s0960-894x(00)00337-1
日期:2000.8
A series of substituents was installed at the 3 position of farnesyldiphosphate through a copper-cyanide mediated coupling of a vinyl triflate with various Grignard reagents. These novel FPP mimetics were then evaluated as inhibitors of or substrates for mammalian protein farnesyl transferase. The IC50 values for these compounds range from 18 to 10,100 nm, with the 3-isopropenyl analogue being one