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Olle Melander

Principal investigator

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Nt-proANP in plasma, a marker of salt sensitivity, is reduced in type 2 diabetes patients.

Author

  • Olle Melander
  • E Frandsen
  • Martin Magnusson
  • Anders Grubb
  • Stefan Jovinge
  • Leif Groop

Summary, in English

Objective. We recently showed that plasma concentration of N-terminal atrial natriuretic peptide (Nt-proANP) is strongly directly related to salt sensitivity. The aims of the present study were to test (i) whether plasma concentration of N-terminal brain natriuretic peptide (Nt-proBNP) is related to salt sensitivity and (ii) whether Nt-proANP, as a marker of salt sensitivity, differs between type 2 diabetes patients and nondiabetic subjects without a history of coronary heart disease.



Methods. Nt-proBNP was determined in 30 Swedish normal subjects with heredity for primary hypertension and salt sensitivity was defined as the difference between mean arterial blood pressure after 1 week on a high-salt diet (240 mmol day-1) and 1 week on a low-salt diet (10 mmol day-1). Nt-proANP was measured in 253 patients with type 2 diabetes and in 230 nondiabetic subjects aged 40–70 years, all without a history of coronary heart disease.



Results. Amongst the 30 subjects, in whom salt sensitivity was directly measured, Nt-proBNP was not correlated with salt sensitivity (R = −0.18, P = 0.35). Nt-proANP (median, interquartile range) was lower in patients with type 2 diabetes (505, 387–661 pmol L-1) than in nondiabetic subjects (536, 421–696 pmol L-1) (P = 0.02). In a multiple regression analysis heart rate (P < 0.00001), diastolic blood pressure (P = 0.02) and diabetes status (P = 0.02) were inversely related whereas age (P < 0.00001), cystatin C (P = 0.0006), hypertension treatment (P = 0.002) and female sex (P = 0.006) were directly related to ln(Nt-proANP).



Conclusion. In contrast to Nt-proANP, Nt-proBNP is not related to salt sensitivity. Salt sensitivity, as estimated by Nt-proANP, seems to be reduced in type 2 diabetes.

Department/s

  • Cardiovascular Research - Hypertension
  • Division of Clinical Chemistry and Pharmacology
  • Stem Cell Center
  • Genomics, Diabetes and Endocrinology

Publishing year

2005

Language

English

Pages

281-288

Publication/Series

Journal of Internal Medicine

Volume

257

Issue

3

Document type

Journal article

Publisher

Wiley-Blackwell

Topic

  • Cardiac and Cardiovascular Systems
  • Pharmacology and Toxicology
  • Endocrinology and Diabetes
  • Medicinal Chemistry

Status

Published

Research group

  • Cardiovascular Research - Hypertension
  • Genomics, Diabetes and Endocrinology

ISBN/ISSN/Other

  • ISSN: 1365-2796