DCG-IV, a potent metabotropic glutamate receptor agonist, as an NMDA receptor agonist in the rat cortical slice.
The depolarization induced by DCG-IV, a potent agonist for Group II metabotropic glutamate receptors (Group II mGluRs), was depressed by selective antagonists for NMDA receptors in the rat cortical slice, but was not affected even by a high concentration of a selective antagonist for Group II mGluRs. DCG-IV caused depolarization more effective than NMDA in a dose-dependent manner with a threshold concentration of 3 microM in rat cortical slices, while DCG-IV was less active than NMDA in rat spinal cords. These actions should be carefully considered particularly when DCG-IV is used as an agonist for mGluRs in vivo.
Uyama
Y
Y
Department of Pharmacology, The Tokyo Metropolitan Institute of Medical Science, Bunkyo-ku, Japan.
Ishida
M
M
Shinozaki
H
H
D000818:Animals; D003521:Cyclopropanes / Q000494:pharmacology*; D004056:Differential Threshold; D004305:Dose-Response Relationship, Drug; D004594:Electrophysiology; D018690:Excitatory Amino Acid Agonists / Q000494:pharmacology; D005625:Frontal Lobe / Q000187:drug effects* / Q000502:physiology; D005998:Glycine / Q000031:analogs & derivatives* / Q000494:pharmacology; D008297:Male; D016202:N-Methylaspartate / Q000494:pharmacology; D009994:Osmolar Concentration; D051381:Rats; D017208:Rats, Wistar; D018094:Receptors, Metabotropic Glutamate / Q000819:agonists*; D016194:Receptors, N-Methyl-D-Aspartate / Q000819:agonists* / Q000037:antagonists & inhibitors
D003521:Cyclopropanes; D018690:Excitatory Amino Acid Agonists; D018094:Receptors, Metabotropic Glutamate; D016194:Receptors, N-Methyl-D-Aspartate; C082313:2-(2,3-dicarboxycyclopropyl)glycine; D016202:N-Methylaspartate; D005998:Glycine