Method of administering proteins to living skin cells

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Liposomes

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424 945, 435193, A61K 3722, A61K 3752

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active

051907623

ABSTRACT:
A method for administering a protein having intracellular biological activity into the interior of living skin cells, which lie below the skin's stratum corneum, is provided. The method comprises the steps of: (a) encapsulating the protein in liposomes; and (b) applying the liposomes to the outer surface of living skin so that the protein encapsulated in the liposomes traverses the skin's stratum corneum and the outer membranes of said cells and is thereby delivered by the liposomes into the interior of said cells. In certain preferred embodiments, the liposomes are pH sensitive liposomes. In other preferred embodiments, the protein is a DNA repair enzyme, such as T4 endonuclease V.

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