Process for the preparation of liposomes

摘要

Synthetic liposomes, for example containing a biologically active substance, are prepared by dispersing a first aqueous liquid with the aid of ultrasonic vibration in a water-immiscible carrier liquid less dense than water in the presence of a compound of the formula XY where X is a hydrophilic polar group and Y is a hydrophobic non-polar group to form dispersed globules of the first aqueous liquid each bounded by a monomolecular layer of the compound XY; adding this dispersion to a second aqueous liquid to form a two layer system separated and bounded by a monomolecular second layer of the compound XY and then centrifuging the system to force the dispersed globules through the second boundary layer of the compound XY and into the second aqueous liquid.