Dose and time effects of treatment with low doses of a LRH agonist on testicular axis and accessory sex organs in rats.

Détails

ID Serval
serval:BIB_99BED81ABD4E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Dose and time effects of treatment with low doses of a LRH agonist on testicular axis and accessory sex organs in rats.
Périodique
Acta Endocrinologica
Auteur⸱e⸱s
Lemarchand-Béraud T., Jaussan V., Zürich M.G.
ISSN
0001-5598[print], 0001-5598[linking]
Statut éditorial
Publié
Date de publication
1986
Volume
112
Numéro
4
Pages
595-602
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
LRH and its agonists have been shown to exert both stimulatory and inhibitory effects on testicular function. In the present study, the dose and length of treatment were tested to determine the appearance of the stimulatory and inhibitory effects of LRH agonist on testicular axis including the three levels. Two doses of an agonist of LRH, 40 and 100 ng/100 g body weight (buserelin, 'agonist'), were administered daily for 1 to 15 days to adult male rats. Control rats received the vehicle only. On day 1, 2, 4, 8 and 15 of treatment, the pituitary, testicular and peripheral levels (weight of accessory sex organs and androgen receptors in ventral prostate) were tested 6 h after the last injection. For the 15 days of treatment with both doses, a stimulatory effect of the 'agonist' was observed on LH and FSH release. A short exposure (1-2 days) to the low dose of the 'agonist' had a stimulatory effect on the density of LH/hCG testicular receptors (326 +/- 49 vs control 185 +/- 21 fmol/mg protein, mean +/- SEM), on the weights of seminal vesicles and ventral prostate and exposure to both doses led to high plasma testosterone levels (13.8 +/- 0.5 and 13.7 +/- 0.7 ng/ml, respectively, vs control 2.6 +/- 0.3 ng/ml), and to an increased density of nuclear androgen receptors in the ventral prostate (142 +/- 9 and 144 +/- 15 fmol/mg protein respectively vs control 97 +/- 12 fmol/mg protein).(ABSTRACT TRUNCATED AT 250 WORDS)
Mots-clé
Animals, Buserelin/pharmacology, Cell Membrane/metabolism, Cell Nucleus/metabolism, Cytosol/metabolism, Dose-Response Relationship, Drug, Gonadotropins, Pituitary/blood, Male, Organ Size/drug effects, Prostate/drug effects, Rats, Rats, Inbred Strains, Receptors, Androgen/drug effects, Receptors, Cell Surface/drug effects, Receptors, LH, Seminal Vesicles/drug effects, Testis/drug effects, Time Factors
Pubmed
Web of science
Création de la notice
14/02/2010 8:37
Dernière modification de la notice
20/08/2019 15:01
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