コリガティブ非理想性によって誘発されたマクロモレキュアルの混雑剤を含む巨大膀の脈動性ゲート
Wan-Chih Su, Douglas L Gettel, Morgan Chabanon1
1Department of Mechanical and Aerospace Engineering, University of California San Diego , La Jolla, California 92093, United States.
Journal of the American Chemical Society
|January 6, 2018
まとめ
大分子混雑剤を備えた巨大な脂質膀は,オスモティック圧力差を経験し,水流入と周期的な膨張爆発を引き起こします. これらのイベントは,圧縮剤を排出し,オスモティック圧力を低下させ,膀を安定させます.
科学分野:
- ポリマー物理学
- バイオ物理学
- 物理化学
背景:
- 溶液中の大きなマクロモレクルは,コリガティブ特性の非微妙な偏差を示します.
- 巨大な脂質小胞は 細胞膜とオスモティック反応の モデルシステムです
研究 の 目的:
- 小分子オスモライトに曝露されたときにマクロ分子混雑剤を含む巨大な脂質小胞のオスモティックな振る舞いを調査する.
- オスモティック・ストレスの下での水輸送と膜動態の背後にあるメカニズムを解明する.
主な方法:
- 制御されたオスモティック条件下で巨大な脂質小胞の実験観察.
- 粘性,拡散性,コリガティブ非理想性を含む理論的な連続体モデルの開発と適用.
- スウェル・ブレスト・サイクルと 毛穴の動態を分析するコンピュータ・シミュレーション
主要な成果:
- マクロモレキュルのコリガティブ非理想性は,膀膜の間のオスモティック圧力差を誘導する.
- 水の流入はサイクリックな膨張爆発を引き起こし,大きさ,張力,相分離の振動が特徴です.
- 暫定的な毛穴形成はマクロモレキュルの段階的な放出を媒介し,オスモティック差を減少させます.
- 理論モデルとシミュレーションは,サイクルの詳細と毛穴の寿命を含む実験観察を正確に再現します.
結論:
- 巨大な膀のマクロモレキュラー群が 透ショックへの反応に影響し 赤血球の行動を模倣します
- オスモティック・ストレスは,膀内の自発的なマクロ分子過密化を阻害する.
- オスモティック・プレッシャーの効果を超えた重要な過密化には,特定の相互作用が必要である.
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