Research paper
Dose response of acute cocaine on sleep/waking behavior in mice

https://doi.org/10.1016/j.nbscr.2018.02.001Get rights and content
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Highlights

  • Cocaine dose dependently increases waking in mice

  • Sleep following acute cocaine normalizes within a 24 h period

  • Cocaine increases fast EEG activity within waking

Abstract

Chronic cocaine use has been associated with sleep disturbances, both during active use periods and during withdrawal and abstinence. Acute cocaine also increases waking at the expense of slow wave sleep and Rapid Eye Movement in non-human subjects. However, the effects of acute cocaine on sleep/waking activity in mice, a rodent model commonly used in both sleep and addiction research due to its high genetic tractability, has yet to be investigated. Sleep/waking activity was measured via polysomnography following IP administration of three doses of cocaine (3.6, 9.6, 18 mg/kg) and vehicle control in male C57BL/6 mice. Cocaine dose-dependently increased sleep latency, increased waking time and increased fast EEG activity within waking. Increases in waking occurred primarily during the first hour following injection, followed by rebound SWS sleep. Sleep/waking activity normalized within a 24-hour period. As with humans and other rodents, cocaine dose dependently reduces sleep in a wildtype strain of mice commonly used in reward and addiction research.

Keywords

Insomnia
Addiction
Substance use disorder
Homeostatic sleep need

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