Journal article
Modulation of sleep by cortisone in normal and bacterially infected rabbits
American journal of physiology. Regulatory, integrative and comparative physiology, Vol.263(6), pp.R1339-R1346
12/01/1992
Handle:
https://hdl.handle.net/2376/108345
PMID: 1481947
Abstract
Infectious disease is known to alter both sleep patterns and hydrocortisone (cortisol) concentrations in rabbits. Moreover, the sleep-altering effects of microbial infections are likely to be mediated via endogenous immune modulators whose actions are attenuated by glucocorticoids. To evaluate the relationships between sleep and glucocorticoids during infectious disease, the effects of cortisone administration (20 mg/kg, im) on sleep were examined before and after inoculation of rabbits with Staphylococcus aureus or Escherichia coli. When administered alone, cortisone did not alter the amount of time spent in slow-wave sleep (SWS) but did reduce electroencephalographic (EEG) slow-wave amplitudes during SWS, the number of bouts of SWS and the amount of time spent in rapid-eye-movement sleep. The duration of individual bouts of SWS was increased after cortisone treatment. Bacterially infected rabbits developed biphasic changes in sleep patterns that were characterized by an initial increase and a subsequent decrease both in SWS time and in EEG slow-wave amplitudes during sleep. Cortisone treatment attenuated these effects in S. aureus-inoculated rabbits. In contrast, cortisone treatment did not alter the initial phase of enhanced sleep in E. coli-inoculated rabbits but did attenuate the subsequent sleep suppression. These data indicate that glucocorticoid administration is associated with an attenuated sleep response in bacterially inoculated rabbits.
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Details
- Title
- Modulation of sleep by cortisone in normal and bacterially infected rabbits
- Creators
- L. A Toth - Department of Comparative Medicine, University of Tennessee, Memphis38163T. W Gardiner - Department of Comparative Medicine, University of Tennessee, Memphis38163J. M Krueger - Department of Comparative Medicine, University of Tennessee, Memphis38163
- Publication Details
- American journal of physiology. Regulatory, integrative and comparative physiology, Vol.263(6), pp.R1339-R1346
- Academic Unit
- Integrative Physiology and Neuroscience, Department of
- Identifiers
- 99900547380901842
- Language
- English
- Resource Type
- Journal article