Polycyclic aromatic hydrocarbons-induced vasorelaxation through activation of nitric oxide synthase in endothelium of rat aorta

Jaw J. Kang, Yu W. Cheng

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In the present study, the effect of polycyclic aromatic hydrocarbons (PAHs) on isolated rat aorta was investigated. Acenaphthylene and naphthalene dose-dependently relaxed the phenylephrine-induced contraction of rat aorta with 50% vasorelaxation at 40.8 ± 19.83 and 118.75 ± 9.83 μM, respectively. The vasorelaxation effect was diminished in the denuded (endothelium removed) aorta suggesting that the relaxation effect of PAHs was endothelium dependent. By comparing PAHs with different ring structures, we have found that acenaphthylene has the highest potency to induce vasorelaxation. Pretreatment with the nitric oxide synthase inhibitor, L-N(G)-nitroarginine methyl ester, and the guanylate cyclase inhibitor, methylene blue, prevents the vasorelaxation induced by PAHs. These results indicate that the vasorelaxation effect of PAHs is mediated by activation of nitric oxide synthase of endothelium.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
JournalToxicology Letters
Volume93
Issue number1
DOIs
Publication statusPublished - Sep 19 1997
Externally publishedYes

Fingerprint

Polycyclic Aromatic Hydrocarbons
Vasodilation
Nitric Oxide Synthase
Endothelium
Aorta
Rats
Chemical activation
Guanylate Cyclase
Methylene Blue
NG-Nitroarginine Methyl Ester
Phenylephrine
acenaphthylene

Keywords

  • Aorta
  • Endothelium
  • Nitric oxide synthase
  • Polycyclic aromatic hydrocarbons

ASJC Scopus subject areas

  • Toxicology

Cite this

Polycyclic aromatic hydrocarbons-induced vasorelaxation through activation of nitric oxide synthase in endothelium of rat aorta. / Kang, Jaw J.; Cheng, Yu W.

In: Toxicology Letters, Vol. 93, No. 1, 19.09.1997, p. 39-45.

Research output: Contribution to journalArticle

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