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Effect of aging on plasma renin and aldosterone in normal man
Copyright policy )Effect of aging on plasma renin and aldosterone in normal man. The influence of aging on the renin-angiotensin-aldosterone system was evaluated by comparing young (20 to 30 yr) with elderly (62 to 70 yr) healthy subjects. Despite comparable body sodium-fluid balance in the two age groups, serum renin concentration, plasma renin activity and aldosterone concentrations were lower in the elderly. The age-related decreases in circulating renin and aldosterone concentrations were slight while subjects were supine and receiving normal sodium intake; when upright and during sodium depletion, they were more pronounced. Inverse renin-blood pressure interrelations were noted during two of four study conditions involving normal sodium intake or mild sodium depletion (r = -0.44 and -0.47, respectively), but not during progressive sodium depletion. Plasma renin levels were decreased in the elderly regardless of the presence or absence of an inverse relationship with blood pressure. Aldosterone and Cortisol responses to corticotropin infusion were unaltered in the elderly. It is concluded that aging may cause a decrease in circulating renin, with parallel lowering of plasma aldosterone concentrations.
Microsoft Academic Graph classification: Supine position SODIUM DEPLETION Blood pressure Renin–angiotensin system Renal function Plasma renin activity Internal medicine medicine.medical_specialty medicine Normal sodium business.industry business Aldosterone chemistry.chemical_compound chemistry Endocrinology
Nephrology
Nephrology
Microsoft Academic Graph classification: Supine position SODIUM DEPLETION Blood pressure Renin–angiotensin system Renal function Plasma renin activity Internal medicine medicine.medical_specialty medicine Normal sodium business.industry business Aldosterone chemistry.chemical_compound chemistry Endocrinology
- Cedars-Sinai Medical Center United States
- Cedars-Sinai Medical Center United States
Effect of aging on plasma renin and aldosterone in normal man. The influence of aging on the renin-angiotensin-aldosterone system was evaluated by comparing young (20 to 30 yr) with elderly (62 to 70 yr) healthy subjects. Despite comparable body sodium-fluid balance in the two age groups, serum renin concentration, plasma renin activity and aldosterone concentrations were lower in the elderly. The age-related decreases in circulating renin and aldosterone concentrations were slight while subjects were supine and receiving normal sodium intake; when upright and during sodium depletion, they were more pronounced. Inverse renin-blood pressure interrelations were noted during two of four study conditions involving normal sodium intake or mild sodium depletion (r = -0.44 and -0.47, respectively), but not during progressive sodium depletion. Plasma renin levels were decreased in the elderly regardless of the presence or absence of an inverse relationship with blood pressure. Aldosterone and Cortisol responses to corticotropin infusion were unaltered in the elderly. It is concluded that aging may cause a decrease in circulating renin, with parallel lowering of plasma aldosterone concentrations.