Oxidative stress suppresses the endothelial secretion of endothelin

T. Saito, H. Itoh, T. Chun, T. Igaki, Y. Mori, J. Yamashita, K. Doi, T. Tanaka, M. Inoue, K. Masatsugu, Y. Fukunaga, N. Sawada, K. Tojo, Y. Saito, T. Hosoya, K. Nakao

研究成果: Article査読

17 被引用数 (Scopus)

抄録

To address endothelial function on vascular walls exposed to oxidative stress, we investigated the effect of oxidative stress on the secretion of endothelin-1 (ET-1) from cultured bovine carotid artery endothelial cells (BAECs). Concentrations of ET-1 in the media were measured by a specific radioimmunoassay and ET-1 mRNA expression was estimated by Northern blot analysis. Treatment of BAECs with 0.5-2.0 mM H2O2 for 3 h suppressed both ET-1 secretion and ET-1 mRNA expression in a dose-dependent manner compared to control. Attenuation of ET-1 mRNA expression by H2O2 was revealed to take place at the transcriptional level. The addition of NG-nitro-L-arginine-methyl ester (L-NAME) 10 μm, a specific nitric oxide synthase inhibitor, had no effect on H2O2-induced suppression of ET-1 mRNA expression. Suppression of ET secretion under oxidative stress observed in the present study is proposed to be a compensatory mechanism of endothelial cells to inhibit vasoconstriction and proliferation during oxidative stress.

本文言語English
ページ(範囲)S345-S347
ジャーナルJournal of Cardiovascular Pharmacology
31
SUPPL. 1
DOI
出版ステータスPublished - 1998 1 1
外部発表はい

ASJC Scopus subject areas

  • 薬理学
  • 循環器および心血管医学

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