title: JL13, a pyridobenzoxazepine compound with potential atypical antipsychotic activity: a review of its behavioural properties.
abstract: The search for an improved clozapine-like compound has resulted in the selection of a new molecule: JL13 (5-(4-methylpiperazin-1-yl)-8-chloro-pyrido[2,3-b][1,5] benzoxazepine fumarate). Like clozapine, JL13 did not antagonize apomorphine-induced stereotypy and did not produce catalepsy but antagonized apomorphine-induced climbing in rodents (ID50 = 3.9 mg kg-1 s.c.). It was inactive against d-amphetamine-induced stereotypy but antagonized d-amphetamine-induced hyperactivity in the mouse (ID50 = 4.4 mg kg-1 i.p.). JL13, like clozapine, was able to antagonize (+/-)-DOI-induced head-twitches in the mouse (ID50 = 2.0 mg kg-1 i.p.). In the open-field test in the rat and forced swimming test in the mouse a high similarity was noted between the two drugs in the same range of doses. In a complex temporal regulation schedule in the dog, JL13 showed a high resemblance with clozapine without inducing sialorrhea, palpebral ptosis or any significant motor side effects. In rats trained to discriminate clozapine, JL13 (10 mg kg-1 i.p.) induced a high level of generalization (70%) to clozapine. In a drug discrimination procedure in the squirrel monkey, JL13 (3-10 mg kg-1 i.m.) produced a full substitution of clozapine. On the basis of these preclinical data, it is thus predicted that JL13 would be a promising atypical antipsychotic drug.
authors.affiliation: Therabel Research s.a., Brussels, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Bruhwyler
authors.forename: J F
authors.initials: JF
authors.lastname: Liégeois
authors.forename: J
authors.initials: J
authors.lastname: Bergman
authors.forename: G
authors.initials: G
authors.lastname: Carey
authors.forename: A
authors.initials: A
authors.lastname: Goudie
authors.forename: A
authors.initials: A
authors.lastname: Taylor
authors.forename: H
authors.initials: H
authors.lastname: Meltzer
authors.forename: J
authors.initials: J
authors.lastname: Delarge
authors.forename: J
authors.initials: J
authors.lastname: Géczy
mesh_terms: D000818:Animals; D014150:Antipsychotic Agents / Q000494:pharmacology*; D001522:Behavior, Animal / Q000187:drug effects*; D003024:Clozapine / Q000031:analogs & derivatives* / Q000494:pharmacology*; D004285:Dogs; D051379:Mice; D051381:Rats; D012453:Saimiri
chemical_list: D014150:Antipsychotic Agents; C108260:JL 13 compound; D003024:Clozapine