title: Effects of prenatal diazepam on two-way avoidance behavior, swimming navigation and brain levels of benzodiazepine-like molecules in male Roman high- and low-avoidance rats.
abstract: Utilizing psychogenetically selected Roman high- and low-avoidance rats (RHA/Verh and RLA/Verh), the present experiments investigated the effects of prenatally administered vehicle and diazepam (1 and 3 mg/kg per day, SC) on the behavior and neurochemistry of adult, male offspring. Active, two-way avoidance behavior was analyzed in 96 rats, at 6 months of age, and swimming navigation in 68 others, at 11 months. Three weeks after testing, selected brain areas from the latter animals were immunoassayed for benzodiazepine (BZD)-like molecules. The 3 mg/kg dose of diazepam both decreased freezing behavior in the shuttle box and reduced the hippocampal content of BZD-like molecules in the RLA/Verh male rats. Swimming navigation (spatial learning), at which the RLA/Verh rats were more adept, was not specifically affected by prenatal diazepam in either rat line. The possibility exists that an increased hippocampal release of BZD-like substances may be necessary to alter shuttle box behavior in RLA/Verh rats.
authors.affiliation: Institut für Nutztierwissenschaften, ETH-Zentrum, Zürich, Switzerland.
authors.forename: P
authors.initials: P
authors.lastname: Driscoll
authors.forename: P
authors.initials: P
authors.lastname: Ferré
authors.forename: A
authors.initials: A
authors.lastname: Fernández-Teruel
authors.forename: M
authors.initials: M
authors.lastname: Levi de Stein
authors.forename: C
authors.initials: C
authors.lastname: Wolfman
authors.forename: J
authors.initials: J
authors.lastname: Medina
authors.forename: A
authors.initials: A
authors.lastname: Tobeña
authors.forename: R M
authors.initials: RM
authors.lastname: Escorihuela
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D001923:Brain Chemistry / Q000187:drug effects; D003975:Diazepam / Q000494:pharmacology*; D005260:Female; D005824:Genetics, Behavioral / Q000187:drug effects; D008124:Locomotion; D008297:Male; D018782:Maze Learning / Q000187:drug effects*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D051381:Rats
chemical_list: D003975:Diazepam