Cytoprotective biocompatible containment systems for...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/14 (2006.01) A61K 9/50 (2006.01) A61K 35/12 (2006.01) A61K 35/26 (2006.01) A61K 35/39 (2006.01) A61K 35/407 (2006.01) B01J 13/14 (2006.01) B01J 13/22 (2006.01)

Patent

CA 2363134

In accordance with the invention, there are provided methods, capsules, and delivery systems useful in preparing biological containment systems with properties (e.g., mechanical strength, capsule permeability and porosity, desired controlled release rates of the biologic or components secreted by the biologic, and immunoreactivity) that can be varied to adapt to a broader range of physiological conditions than known biological containment systems. There are also provided methods of making capsules containing cell aggregates therein, as well as the capsules formed thereby, which are useful as a quantitatively plentiful and low cost alternative to usage of freshly harvested cell aggregates (e.g. islets form pancreas), since the latter are usually available only in limited numbers.

L'invention concerne des procédés, des gélules et des systèmes de libération, utiles dans la préparation de systèmes de confinement biologiques possédant des propriétés (ex: résistance mécanique, perméabilité et porosité de la gélule, vitesses de libération contrôlées voulues des substances biologiques ou des composants sécrétés par le produit biologique, et immunoréactivité) pouvant être modifiées en fonction d'une grande plage d'états physiologiques, à la différence des systèmes de confinement biologique connus. L'invention porte également sur des procédés de fabrication de gélules contenant des agrégats cellulaires, ainsi que sur des gélules formées selon lesdits procédés, utiles comme solution de remplacement économique et produite en grande quantité aux agrégats cellulaires récoltés extemporanément (îlots du pancréas), ces derniers étant généralement disponibles en nombre limité.

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