Effects of nebivolol versus metoprolol on sodium sensitivity and renal sodium handling in hypertensive hispanic postmenopausal women

Richard A. Preston, David Afshartous, Barry J. Materson, Rolando Rodco, Alberto B. Alonso

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Several consistent lines of evidence indicate an association between sodium sensitivity and impaired nitric oxide bioactivity. Nevertheless, whether restoring nitric oxide in humans by pharmacological means can ameliorate sodium sensitivity has not been investigated. Because nebivolol has been demonstrated to increase nitric oxide bioactivity in both laboratory and clinical investigations, we hypothesized that nebivolol might ameliorate sodium sensitivity and improve renal sodium handling in comparison to metoprolol. We therefore conducted a randomized, 2-treatment-period crossover trial in 19 Hispanic postmenopausal women with hypertension to determine the comparative effects of nebivolol versus metoprolol on (1) 24-hour ambulatory blood pressure response to an increase in dietary sodium from 5 days of low sodium to 5 days of high sodium, (2) renal natriuretic response to a 1-L saline challenge, and (3) asymmetrical dimethylarginine. Clinic blood pressure and heart rate were significantly reduced after 4 weeks of treatment with both nebivolol and metoprolol. Twenty-four-hour mean systolic blood pressure increased sharply from low sodium to high sodium for both nebivolol and metoprolol. Nevertheless, the increases in blood pressure did not differ between the 2 drugs: 7.7 (3.1, 12.3) mm Hg with metoprolol and 9.3 (4.6, 13.9) mm Hg with nebivolol (P=0.63). Furthermore, we observed no differences between the drugs in natriuretic response to saline challenge or asymmetrical dimethylarginine. In a sodium-sensitive population, at doses sufficient to produce reductions in blood pressure and heart rate, nebivolol did not demonstrate a significant effect on sodium sensitivity or sodium handling compared with metoprolol.

Original languageEnglish (US)
Pages (from-to)287-295
Number of pages9
JournalHypertension
Volume64
Issue number2
DOIs
StatePublished - Aug 2014

Keywords

  • hypertension
  • kidney
  • nitric oxide
  • sodium

ASJC Scopus subject areas

  • Internal Medicine

Fingerprint Dive into the research topics of 'Effects of nebivolol versus metoprolol on sodium sensitivity and renal sodium handling in hypertensive hispanic postmenopausal women'. Together they form a unique fingerprint.

Cite this