Chronobiology of Natriuretic Peptides and Blood Pressure in Lean and Obese Individuals

Vibhu Parcha, Nirav Patel, Orlando M. Gutierrez, Peng Li, Karen L. Gamble, Kiran Musunuru, Kenneth B. Margulies, Thomas P. Cappola, Thomas J. Wang, Garima Arora, Pankaj Arora

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: Diurnal variation of natriuretic peptide (NP) levels and its relationship with 24-h blood pressure (BP) rhythm has not been established. Obese individuals have a relative NP deficiency and disturbed BP rhythmicity. Objectives: This clinical trial evaluated the diurnal rhythmicity of NPs (B-type natriuretic peptide [BNP], mid-regional pro-atrial natriuretic peptide [MR-proANP], N-terminal pro–B-type natriuretic peptide [NT-proBNP]) and the relationship of NP rhythm with 24-h BP rhythm in healthy lean and obese individuals. Methods: On the background of a standardized diet, healthy, normotensive, lean (body mass index 18.5 to 25 kg/m2) and obese (body mass index 30 to 45 kg/m2) individuals, age 18 to 40 years, underwent 24-h inpatient protocol involving ambulatory BP monitoring starting 24 h prior to the visit, controlled light intensity, and repeated blood draws for assessment of analytes. Cosinor analysis of normalized NP levels (normalized to 24-h mean value) was conducted to assess the diurnal NP rhythm and its relationship with systolic BP. Results: Among 52 participants screened, 40 participants (18 lean, 22 obese; 50% women; 65% Black) completed the study. The median range spread (percentage difference between the minimum and maximum values) over 24 h for MR-proANP, BNP, and NT-proBNP levels was 72.0% (interquartile range [IQR]: 50.9% to 119.6%), 75.5% (IQR: 50.7% to 106.8%), and 135.0% (IQR: 66.3% to 270.4%), respectively. A cosine wave-shaped 24-h oscillation of normalized NP levels (BNP, MR-proANP, and NT-proBNP) was noted both in lean and obese individuals (prhythmicity <0.05 for all). A larger phase difference between MR-proANP BP rhythm (−4.9 h vs. −0.7 h) and BNP BP rhythm (−3.3 h vs. −0.9 h) was seen in obese compared with lean individuals. Conclusions: This human physiological trial elucidates evidence of diurnal NP rhythmicity and the presence of an NP-BP rhythm axis. There exists a misalignment of the NP-BP diurnal rhythm in the obese, which may contribute to the disturbed diurnal BP pattern observed among obese individuals. (The Diurnal Rhythm in Natriuretic Peptide Levels; NCT03834168)

Original languageEnglish (US)
Pages (from-to)2291-2303
Number of pages13
JournalJournal of the American College of Cardiology
Volume77
Issue number18
DOIs
StatePublished - May 11 2021

Keywords

  • blood pressure
  • diurnal rhythm
  • hypertension
  • natriuretic peptides
  • obesity

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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