Diffusive nature of xenon anesthetic changes properties of a lipid bilayer: Molecular dynamics simulations

Eiji Yamamoto, Takuma Akimoto, Hiroyuki Shimizu, Yoshinori Hirano, Masato Yasui, Kenji Yasuoka

研究成果: Article査読

50 被引用数 (Scopus)

抄録

Effects of general anesthesia can be controllable by the ambient pressure. We perform molecular dynamics simulations for a 1-palmitoyl-2-oleoyl phosphatidylethanolamine lipid bilayer with or without xenon molecules by changing the pressure to elucidate the mechanism of the pressure reversal of general anesthesia. According to the diffusive nature of xenon molecules in the lipid bilayer, a decrease in the orientational order of the lipid tails, an increase in the area and volume per lipid molecule, and an increase in the diffusivity of lipid molecules are observed. We show that the properties of the lipid bilayer with xenon molecules at high pressure come close to those without xenon molecules at 0.1 MPa. Furthermore, we find that xenon molecules are concentrated in the middle of the lipid bilayer at high pressures by the pushing effect and that the diffusivity of xenon molecules is suppressed. These results suggest that the pressure reversal originates from a jamming and suppression of the diffusivity of xenon molecules in lipid bilayers.

本文言語English
ページ(範囲)8989-8995
ページ数7
ジャーナルJournal of Physical Chemistry B
116
30
DOI
出版ステータスPublished - 2012 8月 2

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

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