基于碳水化合物的脂质的合成和表征
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
概括
基于碳水化合物的新型脂物为更短的链提供了增强的热稳定性和对酶降解的抵抗力. 然而,较长的链,与糖类相比,会破坏双层结构的稳定性.
科学领域:
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
- 脂质化学 脂质化学
背景情况:
- 脂是细胞膜的关键组成部分.
- 基于甘油的脂被广泛研究,但新的结构提供了潜在的优势.
- 了解替代脂骨架的物理特性对于开发新生物材料至关重要.
研究的目的:
- 合成和描述基于碳水化合物的新型脂.
- 为了比较基于碳水化合物的脂的物理性质与它们的糖对应物.
- 为了研究这些新型脂质的稳定性,混合行为和酶抗性.
主要方法:
- 合成基于碳水化合物的脂 (DLRPC,DMRPC,DARPC) 和糖类相应物 (DLPC,DMPC,DAPC).
- 调制差分扫描热量计 (MDSC) 用于热稳定性和混合研究.
- 两层结构分析的X射线衍射.
- 核磁共振 (NMR) 光谱学用于囊泡结构和动态.
- 使用脂酶A(2) (PLA(2) 的酶降解试验.
主要成果:
- 与糖类相比,碳水化合物骨干增加了C(12) 和C(14) 脂质的热稳定性,但破坏了C(20) 脂质的稳定性.
- 核磁共振揭示了DMRPC囊泡中明显的胆头组信号.
- MDSC证实了基于碳水化合物和糖醇的脂质的可混合性,显示了一个单相过渡温度.
- 碳水化合物脂质对PLA降解表现出抵抗力,与甘油脂类脂质不同.
- 碳水化合物脂质/胆固醇混合物表现出减少的度与增加的胆固醇度.
结论:
- 基于碳水化合物的脂具有独特的热和结构特性,取决于脂肪酸链的长度.
- 这些新型脂质与胆固醇和基于甘油的脂质混合得很好.
- 耐酶降解使得基于碳水化合物的脂对各种应用具有前景.
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