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  • Title: Plasma aldosterone response to angiotensin II and potassium chloride infusions in hypopituitary patients.
    Author: López JM, Rodriguez JA, Marusic ET.
    Journal: Clin Endocrinol (Oxf); 1980 Oct; 13(4):331-7. PubMed ID: 7002372.
    Abstract:
    The acute adrenal response to potassium chloride and angiotensin II (A II) infusions was studied in hypopituitary patients and compared with normal subjects. The peripheral plasma levels of aldosterone (PAC), cortisol (F), potassium (K), and plasma renin activity (PRA), were measured at 09.00 h and after 60 and 120 min of infusion. All subjects were recumbent ad under balance conditions, receiving a daily dietary intake of 180 mmol of sodium and 80 mmol of potassium. Basal PAC in hypopituitary patients was not significantly different from that observed in the control group. Both normal and hypopituitary patients respond to A II infusion with significant increments. Under potassium chloride stimulus the PAC response in hypopituitary patients was only observed when cortisol (20 mg) was given 2 h prior to the infusion. When cortisol replacement was omitted the response KCl was not detected. These results suggest a permissive role of cortisol on glomerulosa response to potassium.
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