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Partial sleep deprivation by environmental noise increases food intake and body weight in obesity‐resistant rats
Author(s) -
Mavanji Vijayakumar,
Teske Jennifer A.,
Billington Charles J.,
Kotz Catherine M.
Publication year - 2013
Publication title -
obesity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.438
H-Index - 199
eISSN - 1930-739X
pISSN - 1930-7381
DOI - 10.1002/oby.20182
Subject(s) - sleep deprivation , wakefulness , sleep (system call) , endocrinology , medicine , obesity , slow wave sleep , privation , weight loss , circadian rhythm , electroencephalography , psychiatry , computer science , operating system
Objective Sleep restriction in humans increases risk for obesity, but previous rodent studies show weight loss following sleep deprivation, possibly due to stressful methods used to prevent sleep. Obesity‐resistant (OR) rats exhibit consolidated‐sleep and resistance to weight gain. It was hypothesized that sleep disruption by a less‐stressful method would increase body weight, and the effect of partial sleep deprivation (PSD) on body weight in OR and Sprague‐Dawley (SD) rats was examined. Design and Methods OR and SD rats ( n = 12/group) were implanted with transmitters to record sleep/wake. After baseline recording, six SD and six OR rats underwent 8 h PSD during light phase for 9 days. Sleep was reduced using recordings of random noise. Sleep/wake states were scored as wakefulness (W), slow‐wave‐sleep (SWS), and rapid‐eye‐movement‐sleep (REMS). Total number of transitions between stages, SWS‐delta‐power, food intake, and body weight were documented. Results Exposure to noise decreased SWS and REMS time, while increasing W time. Sleep‐deprivation increased the number of transitions between stages and SWS‐delta‐power. Further, PSD during the rest phase increased recovery sleep during the active phase. The PSD SD and OR rats had greater food intake and body weight compared to controls Conclusions PSD by less‐stressful means increases body weight in rats. Also, PSD during the rest phase increases active period sleep.