Male and female C57BL/6 mice respond differently to diazepam challenge in avoidance learning tasks

Pharmacology, Biochemistry, and Behavior
J PodhornaR E Brown

Abstract

Benzodiazepines (BZ) impair learning and memory performance of animals. The goal of this study was to examine sex differences in the effects of diazepam on learning and memory of C57BL/6 mice in avoidance paradigms. Male and female C57BL/6 mice were tested in the one-way active avoidance, step-down passive avoidance, and foot-shock pain threshold tasks, following administration of vehicle or diazepam (1 mg/kg). No substantial sex or drug effects on the threshold of the pain response to shock were found. There were no significant differences in avoidance performance between vehicle-treated male and female mice while 1 mg/kg of diazepam produced opposite effects on performance of males and females in both tasks. Diazepam-treated females learned faster in the active avoidance task and showed stronger retention in the passive avoidance task. In contrast, diazepam impaired learning of males in the active avoidance task and had no effect on their performance in the passive avoidance task. Diazepam-induced impairment in males was not due to higher sensitivity to the sedative effect of diazepam as females were more sedated than males on the first trial of the passive avoidance task. Our data showed that sedative and amnesic effects of ...Continue Reading

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Jan 16, 2004·Pharmacology, Biochemistry, and Behavior·Dragan I ObradovićDubravko R Bokonjić
Aug 12, 2008·Behavioural Pharmacology·Jan Adriaan Bouwknecht, Richard Paylor
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