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Seasonal variations in the daily rhythm of pineal gland and/or circulating melatonin and 5-methoxytryptophol concentrations in the European hamster, Cricetus cricetus.

Authors :
Vivien-Roels B
Pevet P
Masson-Pevet M
Canguilhem B
Source :
General and comparative endocrinology [Gen Comp Endocrinol] 1992 May; Vol. 86 (2), pp. 239-47.
Publication Year :
1992

Abstract

Day-night variations in pineal and/or circulating melatonin and 5-methoxytryptophol (5-ML) concentrations were measured monthly throughout the year in female European hamsters, Cricetus cricetus, maintained under natural conditions. Pronounced seasonal variations in the day-night rhythm of both melatonin and 5-ML were observed. As previously reported for melatonin, the daily rhythm of both methoxyindoles disappeared in spring and early summer, while a clear day-night rhythm occurred in autumn, winter, and early spring. The amplitude of the day-night variations appeared to be maximum from October until January. An inverse relationship existed between the rhythms of melatonin and 5-ML.

Details

Language :
English
ISSN :
0016-6480
Volume :
86
Issue :
2
Database :
MEDLINE
Journal :
General and comparative endocrinology
Publication Type :
Academic Journal
Accession number :
1601273
Full Text :
https://doi.org/10.1016/0016-6480(92)90107-u