Phosphatidylinositol 3-kinase inhibition induces vasodilator effect of sevoflurane via reduction of Rho kinase activity

Yasunori Miyamoto, Guo Gang Feng, Shiho Satomi, Katsuya Tanaka, Yoshihiro Fujiwara, Hiroyuki Kinoshita

研究成果: ジャーナルへの寄稿学術論文査読

5 被引用数 (Scopus)

抄録

Aims This study was aimed to examine whether a volatile anesthetic sevoflurane in clinical doses reduces vasoconstriction under the inhibition of phosphatidylinositol 3-kinase (PI3K) in the rat and human arteries and whether the intravenous administration of the PI3K inhibitor decreases blood pressure in rats under the sevoflurane inhalation. Materials and methods Rat arteries (n = 5–6) and human omental arteries (n = 5–6) were subjected to isometric force recordings and western immunoblotting for Rho kinase, mitogen-activated protein kinase, and protein kinase C. Some arteries were incubated with sevoflurane (1.5% or 3%), a selective PI3K inhibitor LY294002 (3 × 10− 6 mol/L) or the combination. Mean arterial pressure (MAP) and heart rate (HR) in rats (n = 7) were evaluated with or without intravenous injection of LY294002 (3 × 10− 6 mol/L) under 2% sevoflurane inhalation. Key findings Sevoflurane with LY294002, but not sevoflurane or LY294002 solely, inhibited the phenylephrine-induced contraction (32% to 52% decrease at phenylephrine [3 × 10− 6 mol/L] in rat arteries and [3 × 10− 5 mol/L] in human arteries). Sevoflurane (3%) only with LY294002 decreased Rho kinase activity in the rat aorta into 30%. Intravenous LY294002 reduced MAP (8.1–12.4 mm Hg decrease), but not HR, in rats under 2% sevoflurane inhalation. Significance Clinical sevoflurane doses with PI3K inhibition reduce the contraction of rat and human arteries ex vivo resulting from Rho kinase inhibition, and systemic blood pressure of rats in vivo. These results suggest that sevoflurane potentially causes vasodilation and hypotension in patients receiving anti-cancer therapy that inhibits PI3K.

本文言語英語
ページ(範囲)20-26
ページ数7
ジャーナルLife Sciences
177
DOI
出版ステータス出版済み - 15-05-2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • 生化学、遺伝学、分子生物学一般
  • 薬理学、毒性学および薬学一般

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