Effects of α1-acid glycoprotein on isometric tension of mouse aorta

Yoshiko Tokutomi, Shigehiro Okamoto, Kazuaki Matsumoto, Masaki Otagiri, Katsuhide Nishi, Naofumi Tokutomi

研究成果: Article

2 引用 (Scopus)

抜粋

We examined the effects of human α1-acid glycoprotein on isometric tension of mouse aortic rings. α1-Acid glycoprotein (7.5-75 μM) produced a transient, concentration-dependent relaxation of the phenylephrine-precontracted preparation. Although NG-nitro-L- arginine methyl ester or removal of endothelium rarely affected the α1-acid glycoprotein-induced relaxation, extracellular heparin inhibited the α1-acid glycoprotein-induced relaxation. In 10 mM Ca2+-containing external solutions, the α1-acid glycoprotein-induced relaxation was significantly potentiated. In the 60 mM KCl-precontracted preparation, α1-acid glycoprotein produced weaker relaxation than in the phenylephrine-precontracted preparation. These results suggest that the vasorelaxant effect of α1-acid glycoprotein is mainly achieved by block of Ca2+ entry in the vascular smooth muscle cells. The interaction between α1-acid glycoprotein molecules and plasmalemmal Ca2+ entry channels may be modified by extracellular Ca2+ and heparin.

元の言語English
ページ(範囲)137-141
ページ数5
ジャーナルEuropean journal of pharmacology
477
発行部数2
DOI
出版物ステータスPublished - 2003 9 12
外部発表Yes

ASJC Scopus subject areas

  • Pharmacology

フィンガープリント Effects of α<sub>1</sub>-acid glycoprotein on isometric tension of mouse aorta' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用