A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
167/163
A61K 9/127 (2006.01)
Patent
CA 1338702
A method for encapsulation of antineoplastic agents in liposomes is provided, having preferably a high drug:lipid ratio. Liposomes may be made by a process that loads the drug by an active mechanism using a transmembrane ion gradient, preferably a transmembrane pH gradient. Using this technique, trapping efficiencies approach 100%, and liposomes may be loaded with drug immediately prior to use, eliminating stability problems related to drug retention in the liposomes. Drug:lipid ratios employed are about 3-80 fold higher than for traditional liposome preparations, and the release rate of the drug from the liposomes is reduced. An assay method to determine free antineoplastic agents in a liposome preparation is also disclosed.
560123
Bally Marcel B.
Cullis Pieter R.
Ginsberg Richard S.
Mayer Lawrence D.
Mitilenes George N.
Elan Pharmaceuticals Inc.
Osler Hoskin & Harcourt Llp
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