Non-Peptide Fibrinogen Receptor Antagonists. 2. Optimization of a Tyrosine Template as a Mimic for Arg-Gly-Asp
作者:Melissa S. Egbertson、Charles T.-C. Chang、Mark E. Duggan、Robert J. Gould、Wasyl Halczenko、George D. Hartman、William L. Laswell、Joseph J. Lynch、Robert J. Lynch
DOI:10.1021/jm00042a007
日期:1994.8
Inhibitors of platelet-fibrinogen binding offer an opportunity to interrupt the final, common pathway for platelet aggregation. Small molecule inhibitors of the platelet fibrinogen receptor GPIIb/IIIa were prepared and evaluated for their ability to prevent platelet aggregation. Compound 23m (L-700,462/MK-383) inhibited in vitro platelet aggregation with an IC50 of 9 nM and demonstrated a selectivity of > 24 000-fold between platelet and human umbilical vein endothelial cell fibrinogen receptors. Dose-dependent inhibition of ex vivo platelet aggregation induced by ADP was achieved with iv infusions of 0.1-10 mu g/kg/min of 23m in anesthetized dogs, with 10 mu g/kg/min completely inhibiting platelet aggregation during the entire 6 h infusion protocol. Platelet aggregatability returned rapidly after the termination of the 23m infusions. These features suggest that 23m may be useful in the treatment of arterial occlusive disorders.