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  3. Diabetes modifies the role of prostanoids and potassium channels which regulate the hypereactivity of the rabbit renal artery to BNP

Diabetes modifies the role of prostanoids and potassium channels which regulate the hypereactivity of the rabbit renal artery to BNP

Data de publicació:

Autors de IIS La Fe

Autors aliens a IIS La Fe

  • Miranda-Gomez, L
  • Castello-Ruiz, M

Grups d'Investigació

Abstract

Diabetic nephropathy is associated with increased risk of cardiovascular disease. B-type natriuretic peptide (BNP) plays an important role in cardiovascular pathophysiology and therapeutics. The aim of the present study was to investigate the influence of experimental diabetes on the mechanisms that regulate the relaxant response of the rabbit renal artery to BNP. Arterial relaxations to BNP were enhanced in diabetic rabbits. Indomethacin enhanced BNP-induced relaxation in control rabbits but showed no effect in diabetic rabbits. BNP-induced release of thromboxane A(2) or prostacyclin was not different in both groups of animals. Iberiotoxin had no effect on relaxations to BNP in both groups of animals. Charybdotoxin displaced to the right the concentration-response curve to BNP in both group of animals, and inhibited BNP-induced relaxation only in diabetic rabbits. Glibenclamide did not modify the BNP-induced relaxations in control rabbits, but inhibited it in diabetic rabbits. These results suggest that diabetes induces hypereactivity of the rabbit renal artery to BNP by mechanisms that at least include (1) a reduced vasoconstrictor influence of arachidonic acid metabolites via cyclooxygenase 2, which is not related with changes in thromboxane A(2) and prostacyclin release from the arterial wall and (2) a selectively increased modulatory activity of K-ATP and endothelial IKCa channels.

Dades de la publicació

ISSN/ISSNe:
0028-1298, 1432-1912

NAUNYN-SCHMIEDEBERGS ARCHIVES OF PHARMACOLOGY  SPRINGER

Tipus:
Article
Pàgines:
501-511
PubMed:
29464270
Factor d'Impacte:
0,682 SCImago ℠
Quartil:
Q2 SCImago ℠

Cites Rebudes en Web of Science: 1

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Keywords

  • B-type natriuretic peptide; Diabetes; Potassium channels; Prostanoids; Renal artery

Campos d'Estudi

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