Fusogenic properties of saposin c and related proteins and...

A - Human Necessities – 61 – K

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Details

A61K 47/42 (2006.01) A61K 9/127 (2006.01) A61K 49/00 (2006.01)

Patent

CA 2742831

The present invention comprises a method for delivering pharmaceutical and/or imaging agents within and/or through the dermal, mucosal and other cellular membranes, and across the blood- brain barrier, utilizing a fusogenic protein. The fusogenic protein is associated with a phospholipid membrane, such as a liposome. The liposome may include dioleoylphos-phatidylserine, a negatively charged long-chain lipid. Alternatively, the liposome is comprised of a mixture of negatively charged long-chain lipids, neutral long- chain lipids, and neutral short-chain lipids. Preferred fusogenic proteins include saposin C and other proteins, polypeptides and peptide analogs derived from saposin C. The active agent contained within the liposome may comprise biomolecules and/or organic molecules. This technology can be used for both cosmetic and medicinal applications in which the objective is delivery of the active agent within and/or beneath biological membranes or across the blood-brain barrier and neuronal membranes.

La présente invention porte sur un procédé d'administration d'agents pharmaceutiques et/ou d'imagerie à l'intérieur de et/ou à travers les membranes dermiques, mucosales et autres membranes cellulaires, et à travers la barrière hémato-encéphalique, à l'aide d'une protéine fusogène. La protéine fusogène est associée à une membrane phospholipidique, telle qu'un liposome. Le liposome peut contenir la dioléoylphosphatidylsérine, un lipide à longue chaîne chargé négativement. En variante, le liposome est composé d'un mélange de lipide à longue chaîne chargé négativement, de lipide à longue chaîne neutre et de lipide à courte chaîne neutre. Les protéines fusogènes préférées comprennent la saposine C et d'autres protéines, polypeptides et analogues peptidiques issus de la saposine C. Le principe actif contenu dans le liposome peut comprendre des biomolécules et/ou des molécules organiques. Il est possible dutiliser cette technologie pour des applications à la fois cosmétiques et médicales, dans lesquelles l'objectif est l'administration du principe actif à l'intérieur de et/ou sous des membranes biologiques ou à travers la barrière hématoencéphalique et les membranes neuronales.

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