In Vivo and in Vitro Effects of Prolactin on Lipid Metabolism in the Cyprinid Teleost Notemigonus crysoleucas

Ovine prolactin has a marked effect on lipid deposition in the cyprinid teleost Notemigonus crysoleucas. Prolactin injections early in the light phase of a long photoperiod (15 C or 24 C) decrease body lipids. Injections of this hormone 10 hours after the onset of a long photoperiod increase body li...

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Bibliographic Details
Published in:Copeia 1976-08, Vol.1976 (3), p.563-573
Main Authors: Pardo, Rube J., de Vlaming, Victor L.
Format: Article
Language:English
Subjects:
Acclimatization
Fatty acids
Glycogen
Hormones
Lipid metabolism
Lipids
Liver
Photoperiod
Sheep
Triglycerides
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Summary:Ovine prolactin has a marked effect on lipid deposition in the cyprinid teleost Notemigonus crysoleucas. Prolactin injections early in the light phase of a long photoperiod (15 C or 24 C) decrease body lipids. Injections of this hormone 10 hours after the onset of a long photoperiod increase body lipids in 15 C acclimated fish, but do not alter fat deposits in 24 C acclimated animals. Experiments designed to determine the in vitro effects of prolactin on liver lipid metabolism gave variable results. Some of our data suggest that lipid metabolism in Notemigonus liver tissue is influenced by prolactin and that the response varies with acclimation conditions of the fish and with the time of day that the liver is removed and put into incubation.
ISSN:0045-8511
1938-5110
DOI:10.2307/1443376