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    • 31. 发明授权
    • Fusogenic lipids and vesicles
    • 融合脂质和囊泡
    • US06379698B1
    • 2002-04-30
    • US09287175
    • 1999-04-06
    • Christopher Paul Leamon
    • Christopher Paul Leamon
    • A61K9127
    • C12N15/1135A61K9/1271A61K48/00C12N15/88C12N2310/315C12N2310/321C12N2310/3341C12N2310/346Y10S977/907C12N2310/3525
    • Novel lipid compounds are provided that may be termed “pro-cationic” in that they are neutral or negatively charged until they are either brought into contact with cellular membranes or are internalized by cells. The lipids have a hydrophobic tail group and a hydrophilic head group, the head group incorporating both a positively and negatively charged region at physiological pH. The hydrophobic tail group is stably connected to the positive region of the head group which in turn is connected to the negative region by a disulfide bond that is susceptible to cleavage by membrane-bound and intracellular factors. Cleavage of the disulfide bond removes the negatively charged region from the head group resulting in a lipid that is cationic and therefor fusogenic with negatively charged cell membranes. Consequently, lipids of the invention are useful as components of liposomes that serve as vehicles for delivering pharmaceutical agents into cells with reduced toxicity.
    • 提供了可以称为“阳离子阳离子”的新型脂质化合物,因为它们是中性的或带负电荷的,直到它们与细胞膜接触或被细胞内化。 脂质具有疏水性尾巴基团和亲水性头部基团,头部基团在生理pH下既带有带正电荷又带负电荷的区域。 疏水性尾基稳定地连接到头基的正区域,该基团又通过易受膜结合和胞内因子切割的二硫键连接到负区。 二硫键的切割从头部基团中除去带负电荷的区域,导致一种阳离子脂质,并带有带负电荷的细胞膜。 因此,本发明的脂质可用作脂质体的组分,其作为用于将药剂递送到具有降低的毒性的细胞中的载体。