Beta-adrenoceptor responsiveness in hypertension: effects of dietary NaCl intake.

Abstract:

:1. Adrenergic responsiveness may be an important determinant of peripheral resistance in man. We have demonstrated that vascular beta-adrenergic responsiveness is reduced in young borderline hypertensive subjects. A parallel defect in beta-adrenergic mediated adenylyl cyclase activity and beta-adrenoceptor affinity for agonists also has been identified in lymphocytes from borderline hypertensive subjects. In contrast, it is unclear whether cardiac beta-adrenergic responsiveness is altered. 2. The reduction in lymphocyte and vascular beta-adrenergic responsiveness is corrected when hypertensive subjects are fed a low sodium chloride diet. This pattern of regulation differs from that seen in young normotensive subjects fed a low NaCl diet where either reduced or unchanged beta-adrenergic responsiveness has been reported. 3. These studies suggest a generalized defect in beta 2-adrenergic responsiveness in borderline hypertensive subjects and demonstrate important differences between normotensive and hypertensive subjects in the pattern of beta-adrenoceptor regulation mediated by dietary sodium intake. The mechanism by which dietary sodium modulates beta-adrenergic responsiveness is yet to be determined.

journal_name

Br J Clin Pharmacol

authors

Feldman RD

doi

10.1111/j.1365-2125.1990.tb05469.x

subject

Has Abstract

pub_date

1990-01-01 00:00:00

pages

55S-60S

eissn

0306-5251

issn

1365-2125

journal_volume

30 Suppl 1

pub_type

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