Journal article
Melatonin Profile in Marmots: The Influence of Catecholamines, Hibernation, and Light
Journal of pineal research, Vol.7(2), pp.105-113
04/1989
DOI: 10.1111/j.1600-079X.1989.tb00659.x
PMID: 2769566
Abstract
The aim of this study was to determine the effects of circulating catecholamines and light on the daily melatonin rhythm in the marmot. Endogenous levels of circulating catecholamines and plasma melatonin were measured during arousal from hibernation in light and stuthes were performed on the circadian melatonin rhythm in two photoperiods (LD 4:20 and LD 8:16). In addition, stuthes were done on the capacity of broad‐band white light at normal room intensities (32 μm2 or 108 lx) and of low‐intensity monochromatic green light (500 nm; 1.4 μm2 or 31 lx) to suppress high nocturnal melatonin levels. We conclude that high levels of plasma catecholamines that occur during arousal from hibernation do not influence the production and secretion of pineal melatonin. During the nocturnal portion of its light/dark cycle, the marmot plasma melatonin rhythm is suppressed by both white light and low‐intensity green light.
Details
- Title: Subtitle
- Melatonin Profile in Marmots: The Influence of Catecholamines, Hibernation, and Light
- Creators
- Gregory FlorantRahel GreenTed AbelScott HartzellLawrence TamarkinGeorge Brainard
- Resource Type
- Journal article
- Publication Details
- Journal of pineal research, Vol.7(2), pp.105-113
- Publisher
- Blackwell Publishing Ltd; Oxford, UK
- DOI
- 10.1111/j.1600-079X.1989.tb00659.x
- PMID
- 2769566
- ISSN
- 0742-3098
- eISSN
- 1600-079X
- Number of pages
- 9
- Language
- English
- Date published
- 04/1989
- Academic Unit
- Molecular Physiology and Biophysics; Psychiatry; Psychological and Brain Sciences; Iowa Neuroscience Institute; Neuroscience and Pharmacology; Biochemistry and Molecular Biology
- Record Identifier
- 9984070301002771
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