Spray-drying method for preparing liposomes and products produced thereby
First Claim
1. A method for preparing a spray-dried mixture of liposomal components which may be stored dry and reconstituted to form a liposome, which comprises forming a solution of lipsomal components in a suitable organic solvent comprised of from about 1 to about 25% by weight of at least one liposome-forming lipid, optionally, at least one biologically active compound, and, optionally, at least one adjuvant which imparts advantageous properties to the final liposome, and adding an aqueous solution or suspension of at least one water-soluble, physiologically acceptable carrier material which is suitable for intravenous injection but which is substantially insoluble in said organic solvent, the weight ratio of liposomal components to carrier material being within the range of from about 0.03:
- 1 to about 5;
1, and spray-drying the so-formed mixture to form a dry mixture of liposomal components.
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Accused Products
Abstract
A method is provided for preparing a stable liposome precursor in the form of a mixture of spray-dried liposomal components including one or more biologically active compounds which may be stored dry and reconstituted with water to form a liposomal preparation immediately prior to use. The dry liposome precursor is also provided.
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Citations
28 Claims
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1. A method for preparing a spray-dried mixture of liposomal components which may be stored dry and reconstituted to form a liposome, which comprises forming a solution of lipsomal components in a suitable organic solvent comprised of from about 1 to about 25% by weight of at least one liposome-forming lipid, optionally, at least one biologically active compound, and, optionally, at least one adjuvant which imparts advantageous properties to the final liposome, and adding an aqueous solution or suspension of at least one water-soluble, physiologically acceptable carrier material which is suitable for intravenous injection but which is substantially insoluble in said organic solvent, the weight ratio of liposomal components to carrier material being within the range of from about 0.03:
- 1 to about 5;
1, and spray-drying the so-formed mixture to form a dry mixture of liposomal components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 27, 28)
- 1 to about 5;
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24. A spray-dried mixture of liposomal components which when mixed with water forms a liposome, comprising a dry granular water-soluble free-flowing mixture of liposomal components comprising at least one liposome-forming lipid, optionally, at least one biologically active compound and, optionally, at least one adjuvant which imparts advantgageous properties to the final lipsome and a water-soluble free-flowing physiologically acceptable carrier material, which is suitable for intraveneous injection, which will form an isotonic solution in water in a concentration of from about 0.5 to about 10% w/v, the weight ratio of liposomal components to carrier material being within the range of from about 0.03:
- 1 to about 5;
1. - View Dependent Claims (25, 26)
- 1 to about 5;
Specification