Extrusion technique for producing unilamellar vesicles
First Claim
1. A method for reducing the lamellarity of a population of liposomes comprising repeatedly passing the liposomes under pressure through a filter which has a pore size (equal to or less than) no larger than about 100 nm.
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Abstract
A method for reducing the lamellarity of a population of liposomes is provided which comprises repeatedly passing the liposomes under pressure through a filter which has a pore size equal to or less than about 100 nm. In certain embodiments, the method is used to convert a population of previously formed multilamellar liposomes into a population of substantially unilamellar liposomes. In accordance with other aspects of the disclosure, liposomes are prepared directly from a lipid powder or pellet and buffer without the use of any solvents, detergents or other extraneous materials.
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Citations
29 Claims
- 1. A method for reducing the lamellarity of a population of liposomes comprising repeatedly passing the liposomes under pressure through a filter which has a pore size (equal to or less than) no larger than about 100 nm.
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10. A method for preparing a population of substantially unilamellar liposomes comprising the steps of:
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(a) preparing multilamellar liposomes; and (b) repeatedly passing the liposomes under pressure through a filter which has a pore size no larger than about 100 nm. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for preparing liposomes without the use of solvents, detergents or other extraneous materials comprising the steps of:
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(a) preparing a mixture of a lipid powder or pellet and an aqueous buffer; and (b) repeatedly passing the mixture under pressure through a filter, wherein the filter has a pore size less than or equal to about 100 nm, the mixture is passed through the filter more than two times, and the resulting liposomes are substantially unilamellar. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification