| Constant light induces alterations in melatonin levels, food intake, feed efficiency, visceral adiposity, and circadian rhythms in rats. | |
| | |
MedLine Citation:
|
PMID: 19761654 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Melatonin levels, metabolic parameters, circadian rhythm activity patterns, and behavior were observed in rats subjected to a 12-h/12-h light/dark cycle (LD) compared to animals exposed to continuous dark (DD) or continuous light (LL). LD and DD animals were similar in melatonin levels, food intake, relative food intake, feed efficiency, water intake, circadian activity levels, and behavior. LL animals had lower melatonin levels in the subjective dark compared to LD and DD animals. Food intake, relative food intake, and water intake values were lower and feed efficiency was more positive in LL animals compared to LD and DD animals. In addition, LL animals exhibited greater visceral adiposity than the other two groups. The circadian rhythmicity of activity became free-running in LL animals and there was a decrease in overall activity. Notable behavioral changes in LL animals were an increase in irritability and excitability. Results indicate that a decrease in melatonin levels and concomitant changes in metabolism, circadian rhythms, and behavior are consequences of exposure to constant light. |
| | |
Authors:
|
Cyrilla H Wideman; Helen M Murphy |
Related Documents
:
|
12499024 - Commercialization of animal biotechnology. 14666124 - Kin-biased distribution in brown trout: an effect of redd location or kin recognition? 19194884 - Taurine deficiency is a cause of vigabatrin-induced retinal phototoxicity. 15989594 - Macrolide antibiotics in food-animal health. 22256684 - Why do we eat? children's and adults' understanding of why we eat different meals. 2839294 - Hepatitis and hepatocellular carcinoma in southeast asia. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Nutritional neuroscience Volume: 12 ISSN: 1476-8305 ISO Abbreviation: Nutr Neurosci Publication Date: 2009 Oct |
Date Detail:
|
Created Date: 2009-09-18 Completed Date: 2009-12-11 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100892202 Medline TA: Nutr Neurosci Country: England |
Other Details:
|
Languages: eng Pagination: 233-40 Citation Subset: IM |
Affiliation:
|
Department of Biology, John Carroll University, 20700 North Park Blvd., Cleveland, OH 44118, USA. cwideman@jcu.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adaptation, Psychological
/
radiation effects* Adiposity / radiation effects* Algorithms Animals Body Weight / radiation effects Circadian Rhythm / radiation effects* Drinking / radiation effects Eating / radiation effects* Intra-Abdominal Fat / radiation effects Light / adverse effects* Male Melatonin / blood, metabolism* Motor Activity / radiation effects* Rats Rats, Long-Evans Sleep Deprivation Telemetry Time Factors |
| Chemical | |
Reg. No./Substance:
|
73-31-4/Melatonin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Folate stimulates ERK1/2 phosphorylation and cell proliferation in fetal neural stem cells.
Next Document: Comparison of two self-rating scales to detect depression: HADS and PHQ-9.