Indeno[1,2-<i>b</i>]pyrazin-2,3-diones: A New Class of Antagonists at the Glycine Site of the NMDA Receptor with Potent in Vivo Activity
作者:Patrick Jimonet、Yves Ribeill、Georg Andrees Bohme、Alain Boireau、Michel Chevé,、Dominique Damour、Adam Doble、Arielle Genevois-Borella、Frédéric Herman、Assunta Imperato、Sylvain Le Guern、Franco Manfré、Jeremy Pratt、John C. R. Randle、Jean-Marie Stutzmann、Serge Mignani
DOI:10.1021/jm990957g
日期:2000.6.1
Indeno[1,2-b]pyrazin-2,3-diones have been identified as a novel series of potent ligands on the glycine site of the NMDA receptor. To improve their in vivo activities, an acetic acid-type side chain was introduced to the 5-position, giving water-soluble compounds when formulated as the sodium salt (> 10 mg/mL). Introduction of a chlorine atom in the 8-position led to a dramatic improvement of anticonvulsant activity and this was surprising since this change did not improve binding affinity. A plausible explanation is a reduced recognition by a Na+,K+-ATPase active transport system responsible for the excretion of these compounds from the brain and kidney. This promising new chemical series led to the optically active isomer (-)-10i (RPR 118723), a glycine/NMDA antagonist with nanomolar binding affinity and in vivo activity in animal model of convulsions and electrophysiology at doses in the range of 2-3 mg/kg following iv administration.