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. 1987 Jan;79(1):290–294. doi: 10.1172/JCI112797

Low sodium diet corrects the defect in lymphocyte beta-adrenergic responsiveness in hypertensive subjects.

R D Feldman, W J Lawton, W L McArdle
PMCID: PMC424047  PMID: 3025262

Abstract

To determine the role of dietary sodium intake in the reduction in beta-adrenergic sensitivity in hypertension, lymphocyte beta-receptors from 8 borderline hypertensive and 16 normotensive subjects were studied after 5 d on a high sodium diet (400 meq/d) and also following a low sodium diet (10 meq/d). During the high sodium diet, lymphocyte beta-receptor-stimulated adenylate cyclase activity, expressed as the relative increase over basal levels stimulated by the beta-agonist isoproterenol, was significantly (P less than 0.025) decreased in hypertensive (24 +/- 5%, mean +/- SE) compared with normotensive (42 +/- 4%) subjects. Neither beta-receptor density nor the proportion of nonsequestered beta-receptors differed between groups. A low sodium diet significantly increased beta-receptor-stimulated adenylate cyclase activity in hypertensives (low sodium, 51 +/- 7%; high sodium, 24 +/- 5%, P less than 0.025) to a level not different than that of normotensives (46 +/- 5%). Thus, reduced lymphocyte beta-receptor responsiveness in hypertensive subjects is not due to beta-receptor sequestration and is corrected on a low sodium diet. Dietary sodium may be an important factor in the beta-receptor defect in early hypertension.

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Selected References

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