Journal article
Sleep in rats rendered chronically hyperprolactinemic with anterior pituitary grafts
Brain research, Vol.755(1), pp.130-136
1997
Handle:
https://hdl.handle.net/2376/100666
PMID: 9163548
Abstract
A hyperprolactinemic rat model [rats bearing anterior pituitary grafts under the capsule of the kidney (AP-grafted rats)] was used to study sleep-wake activity and cortical brain temperature (T
crt). Fisher 344 male rats (
n
=
24) were implanted with anterior pituitaries from rat pups; the control rats (
n
=
12) were sham-operated. Sleep–wake activity and T
crt were recorded for 2 days between weeks 3 and 7 after surgery. The hyperprolactinemic state of the rats was confirmed by plasma prolactin (PRL) assays on week 7 and by determination of PRL mRNA levels in the anterior pituitary of the AP-grafted rats. Neither growth hormone plasma concentration nor pituitary mRNA levels were affected by the pituitary grafts. Duration of non-rapid eye movement sleep (NREMS) was slightly enhanced in the AP-grafted rats. A large increase in rapid eye movement sleep (REMS) during the 12-h light period was the major effect of the implantation of the extra pituitaries. Both the duration and the frequency of the REMS episodes increased and persisted for weeks 4–7 post-implantation. The nocturnal states of vigilance, T
crt, and intensity of NREMS (EEG slow wave activity) were not altered. The results clearly indicate that the enhancements in REMS persist during hyperprolactinemia, and support the hypothesis that PRL possesses REMS-promoting activity.
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Details
- Title
- Sleep in rats rendered chronically hyperprolactinemic with anterior pituitary grafts
- Creators
- F Obál - Department of Physiology, A. Szent-Gyorgyi Medical University, Szeged, HungaryB Kacsóh - Division of Basic Medical Sciences, Mercer University School of Medicine, Macon, GA, USAS Bredow - Department of Physiology and Biophysics, University of Tennessee, 894 Union Avenue, Memphis, TN 38163, USAN Guha-Thakurta - Department of Physiology and Biophysics, University of Tennessee, 894 Union Avenue, Memphis, TN 38163, USAJ.M Krueger - Department of Physiology and Biophysics, University of Tennessee, 894 Union Avenue, Memphis, TN 38163, USA
- Publication Details
- Brain research, Vol.755(1), pp.130-136
- Academic Unit
- Integrative Physiology and Neuroscience, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900546679101842
- Language
- English
- Resource Type
- Journal article