Preparation of liposome and lipid complex compositions

A - Human Necessities – 61 – K

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A61K 47/44 (2006.01) A61K 9/127 (2006.01) A61K 9/16 (2006.01) A61K 47/48 (2006.01)

Patent

CA 2050679

Image (see fig.1) Liposome and lipidic particle formulations of compounds are prepared by dissolving in a solution of liposome-forming lipids in an aprotic solvent such as DMSO, optionally containing lipid-soluvilizing amount of a lower alkanol, and injecting the resulting solution into an aqueous solution. The resulting liposome or lipidic particle suspension may then be dialyzed or otherwise concentrated. This method is particularly useful for compounds which are poorly-soluble in aqueous solution, but is generally useful for any compound or combination of compounds which can be dissolved in the aprotic solvent or aprotic solvent/lower alkanol mixture.

Image (voir fig. 1) Des formulations de composés en liposomes et en particules lipidiques sont préparées par dissolution d'une solution de lipides formateurs de liposomes dans un solvant aprotique comme le DMSO, contenant facultativement une quantité d'alcanol inférieur suffisante pour solubiliser les lipides et par injection de la solution résultante dans une solution aqueuse. La suspension de liposomes ou de particules lipidiques ainsi obtenue peut ensuite être dialysée ou autrement concentrée. Cette méthode est particulièrement utile pour les composés qui sont faiblement solubles en solution aqueuse, mais est généralement utile pour tout composé ou toute combinaison de composés pouvant être dissous dans le solvant aprotique ou le mélange de solvant aprotique/alcanol inférieur.

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