Angiotensin II and the natriuretic and blood pressure response to mental stress in African Americans

Gregory A Harshfield, Coral D. Hanevold, Allison Jasti, Santu Ghosh, Jennifer Pollock, David Pollock, Frank A. Treiber, Yanbin Dong, Varghese George

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objectives: To test the hypothesis that Angiotensin II (Ang II) is a contributing factor to the response pattern in African Americans (AAs) who retain rather than excrete sodium during mental stress. Design/Study Participants: Double-blind, randomized, cross-over trial of 87 healthy AAs aged 18 to 50 years. Interventions: The study participants received either a placebo or irbesartan, (150 mg PO), an Ang II receptor antagonist, for seven days prior to stress testing. Urinary sodium excretion (UNaV) and systolic blood pressure (SBP) were collected prior to and throughout a mental stress protocol (rest and stress period). Setting: A southeastern university. Main Outcome Measures: Ang II, SBP, and sodium retention. Results: During the placebo condition, 62 participants showed the expected increase in UNaV (excreters) while 25 participants reduced UNaV during stress (retainers). Irbesartan retainers demonstrated a reversal in the direction of their natriuretic response, now increasing UNaV in response to stress (∆ UNaV of -.094 mmol/min with placebo vs .052 mmol/min on irbesartan; P<.001). In excreters, irbesartan reduced SBP levels during both rest (-2.36 mm Hg; P=.03) and stress (-4.59;P<.0001), and an even more pronounced reduction in SBP was demonstrated by retainers on treatment during both rest (-4.29 mm Hg; P=.03) and stress (-6.12; P<.001). Conclusions: Ang II contributes to sodium retention in retainers. Furthermore, our findings indicate that suppression of Ang II has a beneficial effect on SBP during rest and stress in this population.

Original languageEnglish (US)
Pages (from-to)511-516
Number of pages6
JournalEthnicity and Disease
Volume28
Issue number4
DOIs
StatePublished - Sep 1 2018

Fingerprint

Angiotensin II
African Americans
irbesartan
Blood Pressure
Sodium
Placebos
Angiotensin Receptor Antagonists
Double-Blind Method
Cross-Over Studies
Outcome Assessment (Health Care)

Keywords

  • Angiotensin II
  • Excreters
  • Irbesartan
  • Retainers
  • Sodium Retention
  • Stress
  • Systolic Blood Pressure

ASJC Scopus subject areas

  • Epidemiology

Cite this

Angiotensin II and the natriuretic and blood pressure response to mental stress in African Americans. / Harshfield, Gregory A; Hanevold, Coral D.; Jasti, Allison; Ghosh, Santu; Pollock, Jennifer; Pollock, David; Treiber, Frank A.; Dong, Yanbin; George, Varghese.

In: Ethnicity and Disease, Vol. 28, No. 4, 01.09.2018, p. 511-516.

Research output: Contribution to journalArticle

Harshfield, Gregory A ; Hanevold, Coral D. ; Jasti, Allison ; Ghosh, Santu ; Pollock, Jennifer ; Pollock, David ; Treiber, Frank A. ; Dong, Yanbin ; George, Varghese. / Angiotensin II and the natriuretic and blood pressure response to mental stress in African Americans. In: Ethnicity and Disease. 2018 ; Vol. 28, No. 4. pp. 511-516.
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