Cochleate formulations and their use for delivering...

A - Human Necessities – 61 – K

Patent

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A61K 9/127 (2006.01)

Patent

CA 2397792

A process for producing a small-sized, lipid-based cochleate. Cochleates are derived from liposomes which are suspended in an aqueous two-phase polymer solution, enabling the differential partitioning of polar molecule based- structures by phase separation. The liposome-containing two-phase polymer solution, treated with positively charged molecules such as Ca2+ or Zn2+, forms a cochleate precipitate of a particle size less than one micron. The process may be used to produce cochleates containing biologically relevant molecules.

L'invention concerne un procédé de production d'une structure cochléaire de petite taille à base de lipide. Les structures cochléaires sont obtenues à partir de liposomes qui sont mis en suspension dans une solution aqueuse polymère à deux phases, ce qui permet de séparer de manière différentielle les structures à base de molécules polaires par séparation de phases. La solution polymère à deux phases contenant des liposomes, traitée à l'aide de molécules chargées positivement telles que Ca?2+¿ ou Zn?2+¿, forme un précipité de structures cochléaires présentant des dimensions de particules inférieures à un micron. Le procédé peut être utilisé pour produire des structures cochléaires contenant des molécules biologiquement utiles.

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