Suppression of luteinizing hormone and testosterone secretion in bulls following adrenocorticotropin hormone treatment.

摘要: The present investigation was conducted to evaluate the inhibitory effects of adrenal corticosteroids on testosterone production by bull testis. Administration a single i.v. dose adrenocorticotropic hormone (ACTH; 80 IU) resulted in corticosteroid peak which lasted approximately 6 h. During this h period, no episodic increases secretion LH or were initiated and basal concentrations suppressed (P less than 0.05) below control values. Episodic resumed 6--7 after ACTH when serum had returned levels. These results suggest that ACTH-induced suppress LH, resulting suppression