Nitric oxide preconditioning regulates endothelial monolayer integrity via the heat shock protein 90-soluble guanylate cyclase pathway

Galina N. Antonova, Connie M. Snead, Alexander S. Antonov, Christiana Dimitropoulou, Richard C Venema, John D. Catravas

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Large (pathological) amounts of nitric oxide (NO) induce cell injury, whereas low (physiological) NO concentrations often ameliorate cell injury. We tested the hypotheses that pretreatment of endothelial cells with low concentrations of NO (preconditioning) would prevent injury induced by high NO concentrations. Apoptosis, induced in bovine aortic endothelial cells (BAECs) by exposing them to either 4 mM sodium nitroprusside (SNP) or 0.5 mM N-(2-aminoethyl)-N-(2-hydroxy-2-nitrosohydrazino)-1,2-ethylenediamine (spermine NONOate) for 8 h, was abolished by 24-h pretreatment with either 100 μM SNP, 10 μM spermine NONOate, or 100 μM 8-bromo-cGMP (8-Br-cGMP). Repair of BAECs following wounding, measured as the recovery rate of transendothelial electrical resistance, was delayed by 8-h exposure to 4 mM SNP, and this delay was significantly attenuated by 24-h pretreatment with 100 μM SNP. NO preconditioning produced increased association and expression of soluble guanyl cyclase (sGC) and heat shock protein 90 (HSP90). The protective effect of NO preconditioning, but not the injurious effect of 4 mM SNP, was abolished by either a sGC activity inhibitor 1H-[1,2,4]oxadiazolo-[4,3-α]quinoxalin-1- one (ODQ) or a HSP90 binding inhibitor (radicicol) and was mimicked by 8-Br-cGMP. We conclude that preconditioning with a low dose of NO donor accelerates repair and maintains endothelial integrity via a mechanism that includes the HSP90/sGC pathway. HSP90/sGC may thus play a role in the protective effects of NO-generating drugs from injurious stimuli.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume292
Issue number2
DOIs
StatePublished - Feb 1 2007

Fingerprint

HSP90 Heat-Shock Proteins
Nitric Oxide
Nitroprusside
Guanylate Cyclase
ethylenediamine
Endothelial Cells
Wounds and Injuries
Quinoxalines
Nitric Oxide Donors
Soluble Guanylyl Cyclase
Electric Impedance
Protein Binding
Apoptosis
Pharmaceutical Preparations

Keywords

  • 8-Bromoguanosine 3′,5′-cyclic monophosphate
  • Bovine aortic endothelial cells
  • Nitric oxide synthase
  • Transendothelial electrical resistance

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

Cite this

Nitric oxide preconditioning regulates endothelial monolayer integrity via the heat shock protein 90-soluble guanylate cyclase pathway. / Antonova, Galina N.; Snead, Connie M.; Antonov, Alexander S.; Dimitropoulou, Christiana; Venema, Richard C; Catravas, John D.

In: American Journal of Physiology - Heart and Circulatory Physiology, Vol. 292, No. 2, 01.02.2007.

Research output: Contribution to journalArticle

Antonova, Galina N. ; Snead, Connie M. ; Antonov, Alexander S. ; Dimitropoulou, Christiana ; Venema, Richard C ; Catravas, John D. / Nitric oxide preconditioning regulates endothelial monolayer integrity via the heat shock protein 90-soluble guanylate cyclase pathway. In: American Journal of Physiology - Heart and Circulatory Physiology. 2007 ; Vol. 292, No. 2.
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