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Prenatal oxazepam affects passive avoidance performance of preweaning mice
L Ricceri1, G Calamandrei, E Alleva
1Behavioural Pathophysiology Section, Istituto Superiore di Sanita, Rome, Italy.
Brain Research Bulletin
|January 1, 1994
Summary
Prenatal exposure to oxazepam impairs learning in young mice. Oxazepam-exposed mice showed reduced ability to withhold a step-down response, indicating altered behavioral performance in aversively motivated tasks.
Area of Science:
- Neuroscience
- Developmental Psychology
- Pharmacology
Background:
- Prenatal exposure to benzodiazepines may affect neurodevelopment.
- Oxazepam is a commonly prescribed anxiolytic medication.
- Understanding the long-term behavioral effects of prenatal drug exposure is crucial.
Purpose of the Study:
- To investigate the impact of prenatal oxazepam exposure on behavioral performance in preweaning mice.
- To assess learning and memory in mice exposed to oxazepam during fetal development.
Main Methods:
- CD-1 outbred mice were administered oxazepam or vehicle during fetal days 12-16.
- Offspring were tested on postnatal days 14 and 15 using a passive avoidance task.
- Behavioral acquisition was measured by latency to step-down from a vibrating platform, with punishment for response.
Main Results:
- Mice prenatally exposed to oxazepam exhibited significantly shorter latencies to step-down across trials.
- This impairment in task acquisition was observed on both testing days (postnatal 14 and 15).
- Nonreinforced control animals prenatally exposed to oxazepam did not show similar latency alterations.
Conclusions:
- Prenatal oxazepam exposure negatively influences the acquisition of aversively motivated behaviors in preweaning mice.
- These findings suggest that fetal exposure to oxazepam can alter behavioral development and performance.
- Further research is warranted to explore the underlying neurobiological mechanisms and potential long-term consequences.