LH and prolactin secretion under constant light in estrogen treated rats (author's transl)

Plasma LH and prolactin levels were studied in ovariectomized adult female rats submitted to light-darkness (L:D) or constant light (L:L) schedules, after the administration of estradiol benzoate (EB), 75 micrograms/day for six consecutive days. Previous to the treatment with EB LH levels were lower...

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Bibliographic Details
Published inRevista espanola de fisiologia Vol. 35; no. 3; p. 285
Main Authors Tejero, A, Vaticón, M D, Fernández-Galaz, C, Aguilar, E
Format Journal Article
LanguageSpanish
Published Spain 01.09.1979
Subjects
Animals
Castration
Circadian Rhythm
Darkness
Estradiol - pharmacology
Female
Light
Luteinizing Hormone - secretion
Ovary - physiology
Ovary - surgery
Photic Stimulation
Prolactin - secretion
Rats
Stimulation, Chemical
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Summary:Plasma LH and prolactin levels were studied in ovariectomized adult female rats submitted to light-darkness (L:D) or constant light (L:L) schedules, after the administration of estradiol benzoate (EB), 75 micrograms/day for six consecutive days. Previous to the treatment with EB LH levels were lower and prolactin levels higher in the L:L females. On days 1 and 2 after treatment, L:D females showed circadian variations of LH levels, these being higher at 17 h than at 10 h. This pattern disappeared in the L:D females. Prolactin levels increased similarly in both groups. Nine days after treatment, plasma prolactin levels remained high and the circadian pattern of LH in the L:D group disappeared.
ISSN:0034-9402