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炭水化物ベースのフォスフォリピドの合成と特徴付け
Geoffrey S Hird1, Thomas J McIntosh, Anthony A Ribeiro
1Department of Chemistry, Paul M. Gross Chemical Laboratory, Duke University, Durham, North Carolina 27708, USA.
Journal of the American Chemical Society
|May 23, 2002
まとめ
新しい炭水化物ベースのフォスホリピドは,より短い鎖のための熱安定性を高め,酵素分解に対する耐性を提供します. しかし,より長い鎖は,グリセロール類に比べて二重層構造を不安定化する.
科学分野:
- バイオケミストリー バイオケミストリー
- 材料科学 材料科学とは
- 脂質化学 脂質化学とは
背景:
- フォスフォリピドは,細胞膜の重要な成分です.
- グリセロールベースのフォスホリピドは広く研究されていますが,新しい構造は潜在的な利点を提供しています.
- 代替フォスフォリピドの骨格の物理的性質を理解することは,新しい生体材料の開発に不可欠です.
研究 の 目的:
- 新しい炭水化物ベースのフォスフォリピドを合成し,特徴づけること.
- 炭水化物ベースのフォスフォリピドの物理的性質を,そのグリセロールの性質と比較するために.
- これらの新しい脂質の安定性,混合行動,および酵素抵抗性を調査するために.
主な方法:
- 炭水化物ベースのフォスホリピド (DLRPC,DMRPC,DARPC) とグリセロール類 (DLPC,DMPC,DAPC) の合成.
- 熱安定性および混合の研究のためのモジュール差スキャンカロメトリ (MDSC).
- 二層構造分析のためのX線 difraktion.
- 核磁共振 (NMR) スペクトロスコーピーは,膀の構造とダイナミクスを調べる.
- 酵素分解アッセイは,フォスフォリパゼA(2) (PLA(2) を用いたものです.
主要な成果:
- 炭水化物の骨格は,C(12) とC(14) の脂質の熱安定性を高めましたが,グリセロール類に比べてC(20) の脂質を不安定化しました.
- NMRは,DMRPCの膀に固有のコレンのヘッドグループ信号を明らかにした.
- MDSCは,炭水化物およびグリセロールベースの脂質の混合性を確認し,単相移行温度を示しました.
- 炭水化物脂質は,グリセロール・フォスホリピドとは異なり,PLAの分解に対する抵抗を示した.
- 炭水化物脂質/コレステロール混合物は,コレステロール濃度が上昇するとエンタルピーの低下を示した.
結論:
- 炭水化物ベースのフォスホリピドは,脂肪酸鎖の長さに依存するユニークな熱的および構造的特性を有しています.
- これらの新しい脂質は,コレステロールおよびグリセロールベースの脂質と良好な混合を示しています.
- 酵素分解に対する耐性は,炭水化物ベースのフォスホリピドを様々な用途に有望にしています.
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