Inbreeding considerations in a REM sleep model for rat swimming activity

Area of Science:

• Neuroscience
• Animal Behavior

Background:

• A repeated measures rat swimming test has been developed to study REM sleep mechanisms.
• REM sleep is implicated in emotional responsiveness and environmental adaptation.
• Previous work used Sprague-Dawley rats from a single supplier and showed general agreement with European studies.

Purpose of the Study:

• To directly compare Sprague-Dawley rats from different vendors (US vs. English).
• To compare different rat strains (Sprague-Dawley, F344, Long Evans) using the swimming test.
• To investigate the impact of inbred strain and vendor on swimming test performance.

Main Methods:

• Utilized a repeated measures rat swimming test.
• Compared Sprague-Dawley rats from US and English vendors.
• Included F344 and Long Evans rat strains for strain comparison.
• Analyzed behavioral differences in the swimming test.

Main Results:

• Significant differences in swimming test performance were observed between inbred rat strains.
• No significant differences were found that were attributable to the vendor of the Sprague-Dawley rats.
• This study reports strain-specific effects on swimming test outcomes, a novel finding.

Conclusions:

• Inbred rat strain is a significant factor influencing performance in the repeated measures swimming test.
• Vendor source does not significantly impact performance for Sprague-Dawley rats in this test.
• The findings highlight the importance of considering rat strain when using the swimming test to study REM sleep and its role in adaptation.