Multilamellar coalescence vesicles (MLCV) containing biologically active compounds
US6544549B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1998 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Sep 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/907
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for producing multilamellar coalescence vesicles (MLCVs) containing increased amounts of biologically active compound is disclosed. The method involves hydrating at least one powdered lipid in an aqueous buffer at a temperature above the phase transition temperature of the highest melting lipid to form multilamellar vesicles, reducing the size of the multilamellar vesicles to about 20-400 nm to produce small unilamellar vesicles (SUVs) or large unilamellar vesicles (LUVs) or a mixture thereof; and incubating the SUVs, LUVs or mixture thereof with a biologically active compound in an aqueous solution under sufficient conditions to form MLCVs containing the biologically active compound without the use of an organic solvent, a freeze-thawing step or a dehydration step. MLCVs produced by this method contain increased amounts of biologically active compound over prior art liposomes produced with an organic solvent, a freeze-thawing step or a dehydration step and fewer vesicles are substantially free of biologically active compound
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.