Liposomes and liposome vesicle precursors with porous...

A - Human Necessities – 61 – K

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Details

A61K 9/127 (2006.01) A61K 49/00 (2006.01) B01J 13/02 (2006.01)

Patent

CA 2175050

The invention relates to a dry deposit as a precursor to liposome vesicles, the precursor being a three-dimensional expanded structure with bulk density between .01 and .001 g/cm3. The invention also concerns a method of making liposome vesicles with an enhanced entrapment capacity by dissolving one or more film forming lipids in at least one organic solvent to form a solution in a reaction vessel, evaporating the solvent to form an expanded three dimensional porous lipid structure, contacting the lipid deposit with an aqueous carrier phase, and producing liposome vesicles entrapping the carrier phase as well as an apparatus comprising an array of tubing or an inert packing which serves as a material support or a matrix surface for the deposition of lipids produced according to the method.

L'invention concerne un dépôt sec utilisé comme précurseur de vésicules liposomiques, ledit précurseur constituant une structure tridimensionnelle expansée présentant une masse volumique en vrac comprise entre 0,01 et 0,001 g/cm?3¿. L'invention porte également sur un procédé de fabrication de vésicules liposomiques à capacité de piégeage accrue qui consiste à dissoudre un ou plusieurs lipides filmogènes dans au moins un solvant organique pour former une solution dans une cuve de réaction, à laisser le solvant s'évaporer pour former une structure lipidique poreuse tridimensionnelle expansée, à mettre le dépôt lipidique en contact avec une phase porteuse aqueuse, et à produire des vésicules liposomiques piégeant la phase porteuse, ainsi que sur un appareil comprenant un réseau de tubes ou un corps de remplissage inerte servant de support matériel ou de surface matricielle pour le dépôt des lipides produits selon le procédé.

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