Non-Peptide RGD Surrogates Which Mimic a Gly-Asp β-Turn: Potent Antagonists of Platelet Glycoprotein IIb−IIIa
作者:Matthew J. Fisher、Bruce Gunn、Cathy S. Harms、Allen D. Kline、Jeffrey T. Mullaney、Anne Nunes、Robert M. Scarborough、Ann E. Arfsten、Marshall A. Skelton、Suzane L. Um、Barbara G. Utterback、Joseph A. Jakubowski
DOI:10.1021/jm9701076
日期:1997.6.1
Cyclic heptapeptide 1, which contains an Arg-Gly-Asp sequence, has good affinity for the platelet receptor GPIIb-IIIa and was chosen for study by H-1 NMR techniques. The key RGD sequence of this molecule was found to reside in a conformationally defined type II' Gly-Asp beta-turn, and this information was used in the design of simple non-peptide RGD mimics. Disubstituted isoquinolones, bearing an acidic side chain at position 2 and a basic side chain at position 6, were prepared and were found to have modest affinity for GPIIb-IIIa. Systematic modification of the basic residue contained in these molecules yielded compounds with high affinity for GPIIb-IIIa.