Liposome Technology, Inc.

Paul S Uster

Francis J Martin

Yolanda P Quinn

Jacqueline K Morano

Robert M Fielding

A liposome gel composition and method of preparing the same. The composition is composed of charged liposomes, at a relatively low lipid concentration, in a low-conductivity medium. The composition preferably contains a zwitterionic compound at its isoelectric point. The liposomes can be designed for cosmetic use, transdermal drug delivery, or enhanced retention on mucosal tissues, such as for ophthalmic use.

Liposome gel composition and method

An aqueous, noncrystalline minoxidil composition for topical use which has significantly improved flux of the drug through human cadaver skin. The composition contains minoxidil complexed with an amphipathic compound, oleic acid and with pharmaceutically acceptable excipients. The composition may be formulated in an aqueous vehicle, or dispersed in fluorochlorocarbon solvent for spray delivery from a self- propelled spray device.

Non-crystalline minoxidil composition

A composition and method for treating a wound or surgical incision, by sustained-released delivery of epidermal growth factor (EGF). The composition includes a high-viscosity aqueous dispersion of negatively charged liposomes with liposome-entrapped EGF. The EGF/liposome composition is formed, in one embodiment of the invention, by suspending a lipid mixture typically containing equimolar amounts of neutral and negatively charged phopholipids and cholesterol in a low-conductivity aqueous medium containing EGF and a zwitterionic compound whose isoelectric point is between pH 5.5 and 8.5 to form a gel-like composition. One embodiment of the invention contains EGF entrapped by surface adsorption to the liposomes, for slow release from the composition.

EGF/Liposome gel composition and method

An aqueous, noncrystalline minoxidil composition for topical use. The composition contains minoxidil complexed with an amphipathic compound having a pK less than about 5 and containing a single lipophilic chain moiety and a sulfate, sulfonate, phosphate and phosphonate polar moiety. The composition may be formulated in ointment form, in an aqueous vehicle, or dispersed in a fluorochlorocarbon solvent, for spray delivery from a self-propelled spray device.

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Palo Alto, CA, United States of America

Paul S Uster