Effect of Adrenalectomy on Acceleration of Gluconeogenesis by Calcium Ions, Adenosine 3':5'-cyclic Monophosphate and Adrenaline in Rat Kidney Tubules
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1. Gluconeogenesis from pyruvate was measured in renal-cortical-tubules fragments prepared from fed male rats 6-8 days after adrenalectomy or sham adrenalectomy. The response of this process to 3':5'-cyclic AMP and adrenaline was compared in these two states at two Ca2+ concentrations. 2. Adrenalectomy decreased the percentage stimulation of gluconeogenesis by 3':5'-cyclic AMP, but increased percentage stimulation by adrenaline. Cortisol treatment of adrenalectomized rats (50 mg/kg, twice daily for 2 days) did not reverse the change in responsiveness to 3':5'-cyclic AMP and adrenaline. 3. Stimulation of gluconeogenesis by 1 micron-adrenaline was unaffected by 10 micron-propranolol (beta-blocker) in either state. Phentolamine (alpha-blocker; 10 micron) totally blocked stimulation of gluconeogenesis by 1 micron-adrenaline in the sham-operated condition, but was only partially effective in this respect after adrenalectomy.
Saggerson E, Carpenter C Biochem J. 1980; 190(2):283-91.
PMID: 6258565 PMC: 1162092. DOI: 10.1042/bj1900283.
Kessar P, Saggerson E Biochem J. 1980; 190(1):119-23.
PMID: 6255939 PMC: 1162069. DOI: 10.1042/bj1900119.