Open AccessThe effect of agonists at the GABA-benzodiazepine-receptor-complex on the proconflict effect induced by .BETA.-CCM and pentetrazol in rats.
Author(s) -
Tadashi Nagatani,
Tsuneyuki Yamamoto,
T.T. Sugihara,
Showa Ueki
Publication year - 1988
Publication title -
japanese journal of pharmacology/japanese journal of pharmacology
Language(s) - English
Resource type - Journals
eISSN - 1347-3506
pISSN - 0021-5198
DOI - 10.1254/jjp.46.267
Subject(s) - aminooxyacetic acid , diazepam , chemistry , pharmacology , beta (programming language) , gabaa receptor , benzodiazepine , latency (audio) , chlordiazepoxide , phenobarbital , receptor , medicine , biochemistry , electrical engineering , enzyme , engineering , computer science , programming language
The effect of anxiolytics, benzodiazepine (BZP), diazepam (DZP), non-BZP zopiclone (ZOP) and phenobarbital (PBT), on the proconflict effect induced by methyl-beta-carboline-3-carboxylate (beta-CCM) or by pentetrazol (PTZ) was investigated. The proconflict effect of beta-CCM and PTZ was reduced by these anxiolytics and aminooxyacetic acid (AOAA). In addition, isoniazid produced proconflict activity. Therefore, it is suggested that anxiolytics facilitate the GABA-ergic function, causing the inhibition of the proconflict effect. Although both propyl-beta-carboline-3-carboxylate (beta-CCP) and Ro15-1788 did not produce proconflict activity, they reduced the proconflict effect induced by beta-CCM but not by PTZ. These data clearly show that beta-CCM exerts the proconflict effect through interaction with BZP receptor and that there are behavioral similarities between beta-CCP and Ro15-1788. In this study, we additionally observed the time latency until the rat began to drink the water. beta-CCM and PTZ prolonged this latency in a dose-dependent manner. However, AOAA could not reduce the prolonged latency induced by beta-CCM and by PTZ, and anxiolytics and beta-CCP could not reduce the prolonged latency induced by beta-CCM. The mechanism of the prolongation of latency induced by beta-CCM and PTZ seems to be different from that of the proconflict effect.