Drug delivery from embolic agents

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/16 (2006.01) A61K 31/4745 (2006.01) A61P 35/04 (2006.01)

Patent

CA 2579533

An embolic composition comprises microspheres formed of water-insoluble water- swellable anionic polymer having swollen diameter more than 100~m, and a cationic camptothecin compound, preferably irinotecan. The microspheres are preferably formed of crosslinked polyvinylalcohol, preferably of ethylenically unsaturated polyvinylalcohol macromer, crosslinked with anionic ethylenically unsaturated anionic comonomer. The compositions are used to treat hypervascular tumours for instance colorectal metastases of the liver.

L'invention concerne une composition d'embolisation comprenant des microsphères constituées d'un polymère anionique insoluble dans l'eau, capable de gonfler dans l'eau et présentant, à l'état gonflé, un diamètre supérieur à 100 ?m, et d'un composé de camptothécine cationique, de préférence d'irinotécane. Ces microsphères sont de préférence constituées d'alcool polyvinylique réticulé, de préférence de macromère d'alcool polyvinylique éthyléniquement insaturé, réticulé avec un comonomère anionique éthyléniquement insaturé. Ces compositions sont utilisées pour traiter des tumeurs hypervasculaires, par exemple des métastases hépatiques colorectales.

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