Role of adrenal steroids on the cardiac c-AMP response to isoprenaline in the rat

• Main Authors: S. Phornchirasilp, O. P. Matangkasombut
• Other Authors: Mahidol University
• Format: Article
• Published: 2018
• Subjects: Biochemistry, Genetics and Molecular Biology; Medicine
• Online Access: https://repository.li.mahidol.ac.th/handle/123456789/30300

The effect of adrenalectomy on the basal cardiac c-AMP level and the elevated c-AMP level induced by intravenous administration of isoprenaline (10 mcg/kg) were determined by radio-protein assay. The basal cardiac c-AMP level was not altered by adrenalectomy. But the cardiac c-AMP responses to isoprenaline were significantly less in adrenalectomized rats, maintained with 1% sodium chloride solution for one week; this effect, however, disappeared when animals were maintained for 2 or 4 weeks. This could not be restored by acute administration of dexamethasone (100 mcg/rat). The possible reasons for these effects of adrenalectomy are discussed.