Open Access.BETA.-Phenyl-.BETA.-Alanine Prevents the Activation of Vagal Efferent Discharges Evoked by Baclofen and GABA in Rats.
Author(s) -
K. Yamasaki,
Yoshiaki Gotō
Publication year - 1992
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.60.55
Subject(s) - efferent , baclofen , chemistry , endocrinology , medicine , antagonist , vagus nerve , bicuculline , gaba receptor antagonist , afferent , biology , agonist , stimulation , biochemistry , receptor
The effects of DL-beta-phenyl-beta-alanine (BPBA) on vagal efferent discharges elicited by gamma-aminobutyric acid (GABA) and baclofen were investigated in rats. When given alone, BPBA (40 mg/kg, i.v.) caused no significant change in vagal nerve response and did not elicit any convulsions. Pretreatment with BPBA (40 mg/kg, i.v.) resulted in 70% and 80% reductions in the vagal efferent discharges induced by GABA (400 mg/kg, i.v.) and baclofen (4 mg/kg, s.c.), respectively. The present results suggest that BPBA may be a novel GABA antagonist with respect to vagal activation mechanisms in the CNS.