title: Effects of ketamine and (+)cyclazocine on 4-aminopyridine and "magnesium free" epileptogenic activity in hippocampal slices of rats.
abstract: The effects of ketamine and (+)cyclazocine on three in vitro models of epilepsy: the "Mg2+ free", the 4-aminopyridine (4-AP) and, for comparison, the penicillin model were studied. These data indicate that the two compounds had an inhibitory effect in hippocampal slices of rats, bathed in "Mg2+ free" solution at a concentration that did not influence the basal field potential. They also had an inhibitory effect on the penicillin model, but at concentrations ten times greater than those effective against "Mg2+ free" model. On the other hand, (+)cyclazocine was equally active against epileptogenic activity produced by 4-AP and "Mg2+ free" solution, while ketamine failed to produce an effect on epileptiform activity induced by 4-AP.
mesh_terms: D015763:2-Amino-5-phosphonovalerate; D015761:4-Aminopyridine; D000631:Aminopyridines / Q000494:pharmacology*; D000818:Animals; D001224:Aspartic Acid / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors / Q000378:metabolism; D003496:Cyclazocine / Q000494:pharmacology*; D004827:Epilepsy / Q000139:chemically induced; D006624:Hippocampus / Q000187:drug effects*; D007649:Ketamine / Q000494:pharmacology*; D008274:Magnesium / Q000378:metabolism*; D008297:Male; D016202:N-Methylaspartate; D051381:Rats; D011919:Rats, Inbred Strains; D009435:Synaptic Transmission / Q000187:drug effects; D014633:Valine / Q000031:analogs & derivatives / Q000494:pharmacology
chemical_list: D000631:Aminopyridines; D001224:Aspartic Acid; D016202:N-Methylaspartate; D007649:Ketamine; D015763:2-Amino-5-phosphonovalerate; D015761:4-Aminopyridine; D014633:Valine; D008274:Magnesium; D003496:Cyclazocine