Production of multivesicular liposomes

A - Human Necessities – 61 – K

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Details

A61K 9/127 (2006.01) A61K 45/06 (2006.01)

Patent

CA 2309548

Multivesicular liposomes are prepared at commercial scales by combining a first w/o emulsion with a second aqueous solution to form a w/o/w emulsion using a static mixer. Solvent is removed from the resulting emulsion to form multivesicular liposome-containing compositions. Further optional process steps include primary filtration and secondary cross-flow filtration. The products produced according to the processes of the invention can be produced through a series of aseptic steps.

L'invention concerne des liposomes multivésiculaires, dont la préparation à l'échelle industrielle consiste à combiner une première émulsion eau dans huile avec une seconde solution aqueuse pour former une émulsion eau dans huile dans eau utilisant un mélangeur statique. On élimine le solvant de l'émulsion ainsi obtenue pour former des compositions contenant des liposomes multivésiculaires. D'autres éventuelles étapes de ce procédé comprennent une filtration primaire et une filtration à courant transversal secondaire. Les produits obtenus grâce aux procédés de l'invention peuvent être produits à travers une série d'opérations aseptiques.

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