Liposome for entrapping gene, liposomal preparation and...

Details Liposome for entrapping gene, liposomal preparation and... Liposome for entrapping gene, liposomal preparation and...

C - Chemistry, Metallurgy

12

N

C12N 15/88 (2006.01) A61K 9/127 (2006.01) C12N 15/64 (2006.01)

Patent

CA 2050072

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-(.alpha.-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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