MOLECULAR AGGREGATE CAPABLE OF UNDERGOING PHASE TRANSITION BY DEHYDRATING CONDENSATION AND METHOD OF PHASE TRANSITION THEREOF
申请人:Japan Science and Technology Agency
公开号:EP1852177A1
公开(公告)日:2007-11-07
The present invention provides a bilayer membrane vesicle capable of undergoing a phase transition, and the bilayer membrane vesicle comprises as components of the membrane, (a) a fatty acid salt having 6 to 20 carbon atoms; (b) an alcohol or an amine compound having an aliphatic chain of 6 to 20 carbon atoms; and (c) an artificial synthetic lipid or a phospholipid capable of forming a bilayer membrane. Preferably, this bilayer membrane vesicle further comprises (d) a tertiary amine as a component of the membrane. The present invention also provides a method of inducing a phase transition of a bilayer membrane vesicle, the method comprising a step of adding a dehydrating condensing agent or a dehydrating condensing agent precursor having property of accumulating at an interface to the bilayer membrane vesicle. According to the present invention, by causing the lipids that form a molecular aggregate to chemically change, it is possible to change the physical property and the morphology of the molecular aggregate and control the timing of phase transitions such as membrane fusion. In the membrane fusion, for example, fusion can occur without leaking out the contents of the bilayer membrane vesicle.
本发明提供了一种能够发生相变的双层膜囊泡,该双层膜囊泡包括:(a) 具有 6 至 20 个碳原子的脂肪酸盐;(b) 具有 6 至 20 个碳原子的脂肪族链的醇或胺化合物;(c) 能够形成双层膜的人工合成脂质或磷脂。最好,这种双层膜囊泡还包括(d)作为膜成分的叔胺。本发明还提供了一种诱导双层膜囊泡相变的方法,该方法包括添加脱水冷凝剂或脱水冷凝剂前体的步骤,该脱水冷凝剂或脱水冷凝剂前体具有在双层膜囊泡界面聚集的特性。根据本发明,通过使形成分子聚合体的脂质发生化学变化,可以改变分子聚合体的物理性质和形态,并控制膜融合等相变的时间。例如,在膜融合过程中,可以在不泄露双层膜囊内容物的情况下发生融合。