Preparation of liposome and lipid complex compositions
First Claim
1. A product of the process for preparing a lipid suspension of particle size less than about 10,000 nm in diameter encapsulating a therapeutically, pharmaceutically or diagnostically useful compound, which process comprises:
- dissolving said useful compound and an encapsulating amount of a suitable lipid in a sufficient amount of a solvent mixture comprising a non-halogenated hydrocarbon aprotic solvent to provide a compound/lipid solution; and
extruding said compound/lipid solution through a suitably-sized aperture into an aqueous solution to form a lipid-compound suspension of particle size less than about 10,000 nm in diameter.
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Abstract
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 a lipid-solubilizing amount of a lower alkanol, and either injecting the resulting solution into an aqueous solution, or the aqueous solution into the resulting 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.
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4 Claims
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1. A product of the process for preparing a lipid suspension of particle size less than about 10,000 nm in diameter encapsulating a therapeutically, pharmaceutically or diagnostically useful compound, which process comprises:
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dissolving said useful compound and an encapsulating amount of a suitable lipid in a sufficient amount of a solvent mixture comprising a non-halogenated hydrocarbon aprotic solvent to provide a compound/lipid solution; and extruding said compound/lipid solution through a suitably-sized aperture into an aqueous solution to form a lipid-compound suspension of particle size less than about 10,000 nm in diameter. - View Dependent Claims (2, 3, 4)
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Specification