Effect of cortisol on luteinizing hormone release during sexual behavior in the boar

The effect of inhibiting the rise in cortisol concentrations that occurs at copulation upon luteinizing hormone release was studied in seven adult boars. Plasma samples were collected for assay of luteinizing hormone, testosterone and cortisol on a control day and before, during and after exposure t...

Full description

Saved in:
Bibliographic Details
Published in:Canadian journal of veterinary research 1986-10, Vol.50 (4), p.540-542
Main Authors: Wang, L.X, Huether, P, Doble, E, Liptrap, R.M
Format: Article
Language:English
Subjects:
Animals
boars
copulation
Copulation - physiology
cortisol
hormone secretion
Hydrocortisone - blood
Hydrocortisone - metabolism
luteinizing hormone
Luteinizing Hormone - blood
Luteinizing Hormone - metabolism
Male
Metyrapone - pharmacology
sexual behavior
Swine - metabolism
Swine - physiology
Testosterone - blood
Testosterone - metabolism
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of inhibiting the rise in cortisol concentrations that occurs at copulation upon luteinizing hormone release was studied in seven adult boars. Plasma samples were collected for assay of luteinizing hormone, testosterone and cortisol on a control day and before, during and after exposure to an estrous sow. The area under the curve was used to evaluate hormone production and treatment effects were evaluated by a paired Student's t-test. The 11 beta-hydroxylase inhibitor, metyrapone, was used to suppress glucocorticoid hormone production. Cortisol concentrations increased significantly (p less than 0.05) after breeding compared to values on the control day while treatment with metyrapone prior to breeding prevented the cortisol increase (p greater than 0.05). Although luteinizing hormone production increased significantly after copulation in both breeding experiments, metyrapone pretreatment resulted in a reduction of luteinizing hormone secretion (p less than 0.05). Testosterone production was also reduced in boars pretreated with metyrapone. The results suggest that the increased levels of cortisol occurring at copulation may enhance luteinizing hormone release in boars.
ISSN:0830-9000