Echogenic microbubbles and microemulsions for...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/107 (2006.01) A61K 41/00 (2006.01) A61K 47/34 (2006.01) A61P 35/00 (2006.01)

Patent

CA 2609268

Described are methods and compositions for treating tumors, such as drug- sensitive tumors, inoperable tumors, poorly vascularized tumors, and multidrug resistant tumors, by intravenous or direct intratumoral injection of compositions comprising microemulsions and polymeric micelle-encapsulated biologically active agents. The methods and compositions also include microemulsions converting into microbubbles in situ upon injection. The methods disclosed optionally including applying a micelle disruption method such as ultrasound. Also disclosed are methodologies of imaging administration of agents in tissues using streams of microemulsions which create microbubbles in situ upon injection. The methods and compositions also include enhancement of tumor treatment through use of microemulsions which create microbubbles in situ, upon injection, as cavitation nuclei. The methods and compositions are also useful in enhancing intracellular drug delivery.

La présente invention concerne des méthodes et des compositions utiles pour traiter des tumeurs telles que les tumeurs pharmacosensibles, les tumeurs inopérables, les tumeurs faiblement vascularisées et les tumeurs à résistance pléiotrope, par injection intraveineuse ou intratumorale directe de compositions comprenant des microémulsions et des agents biologiquement actifs encapsulés dans des micelles polymères. Les méthodes et les compositions selon l'invention comprennent également des microémulsions qui se transforment en microbulles in situ au moment de l'injection. Les méthodes présentées peuvent également comprendre l'application d'un procédé de perturbation micellaire tel que des ultrasons. Cette invention concerne également des méthodologies d'imagerie de l'administration d'agents dans des tissus au moyen de flux de microémulsions qui créent des microbulles in situ au moment de l'injection. Les méthodes et les compositions renforcent également le traitement des tumeurs par l'utilisation de microémulsions qui créent des microbulles in situ, lors de l'injection, sous forme de noyaux de cavitation. Les méthodes et les compositions sont également utiles pour améliorer l'apport de médicament au sein des cellules (apport intracellulaire).

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