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Method for loading lipid like vesicles with drugs of other chemicals

United States Patent

5,762,957
June 9, 1998
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
A method for accumulating drugs or other chemicals within synthetic, lipid-like vesicles by means of a pH gradient imposed on the vesicles just prior to use is described. The method is suited for accumulating molecules with basic or acid moieties which are permeable to the vesicles membranes in their uncharged form and for molecules that contain charge moieties that are hydrophobic ions and can therefore cross the vesicle membranes in their charged form. The method is advantageous over prior art methods for encapsulating biologically active materials within vesicles in that is achieves very high degrees of loading with simple procedures that are economical and require little technical expertise, furthermore kits which can be stored for prolonged periods prior to use without impairment of the capacity to achieve drug accumulation are described. A related application of the method consists of using this technology to detoxify animals that have been exposed to poisons with basic, weak acid or hydrophobic charge groups within their molecular structures.
Mehlhorn; Rolf Joachim (Richmond, CA)
Regents of the University of California (Alameda, CA)
08/ 474,382
June 7, 1995
ACKNOWLEDGEMENT OF GOVERNMENT SUPPORT This invention was made with Government support under Grant No: DE-AC03-76SF00098 with the Department of Energy and the University of California. The Government has the rights in this invention.