Liposome for entrapping gene, liposomal preparation and process for the manufacture of the preparation
First Claim
1. A process for producing a deoxyribonucleic acid entrapping multilamellar liposome, comprising the following steps:
- dissolving lipids of N-(α
-trimethylammonioacetyl)-didodecyl-D-glutamate chloride, dilauroylphosphatdylcholine and dioleophosphatidylethanolamine in a molar ratio of 1;
2;
2, in a solvent suitable for forming a lipid film,removing the solvent with an evaporator to form a lipid film,adding a deoxyribonucleic acid solution to said lipid film to form a mixture, andshaking said mixture with a vortex mixer to form a deoxyribonucleic acid entrapping multilamellar liposome.
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Abstract
For increasing gene entrapping efficiency, it is preferable that liposome membrane to be formed is positively charged. For this purpose, a lipid with quaternary amine has been employed as one of constitutional lipids, but the such lipid may show toxicity to cells to be transformed with the gene for expression. The invention selects, as constitutional lipids for liposomes, N-(α-trimethylammonioacetyl)-didodecyl-D-glutamate chloride (TMAG), dilauroylphosphatidylcholine (DLPC), and dioleoylphosphatidylethanolamine (DOPE) with molar ratio of 1:2:2, and vortex treatment for preparing the liposomes with multi-layers to entrap the gene therein.
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Citations
4 Claims
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1. A process for producing a deoxyribonucleic acid entrapping multilamellar liposome, comprising the following steps:
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dissolving lipids of N-(α
-trimethylammonioacetyl)-didodecyl-D-glutamate chloride, dilauroylphosphatdylcholine and dioleophosphatidylethanolamine in a molar ratio of 1;
2;
2, in a solvent suitable for forming a lipid film,removing the solvent with an evaporator to form a lipid film, adding a deoxyribonucleic acid solution to said lipid film to form a mixture, and shaking said mixture with a vortex mixer to form a deoxyribonucleic acid entrapping multilamellar liposome. - View Dependent Claims (2, 3, 4)
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Specification