Biodegradable poly(beta-amino esters) and uses thereof

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 73/00 (2006.01) A61K 9/00 (2006.01)

Patent

CA 2527722

Poly(.beta.-amino esters) prepared from the conjugate addition of bis(secondary amines) or primary amines to a bis(acrylate ester) are described. Methods of preparing these polymers from commercially available starting materials are also provided. These tertiary amine-containing polymers are preferably biodegradable and biocompatible and may be used in a variety of drug delivery systems. Given the poly(amine) nature of these polymers, they are particularly suited for the delivery of polynucleotides. Nanoparticles containing polymer/polynucleotide complexes have been prepared. The inventive polymers may also be used to encapsulate other agents to be delivered. They are particularly useful in delivering labile agents given their ability to buffer the pH of their surroundings. A system for preparing and screening polymers in parallel using semi-automated robotic fluid delivery systems is also provided.

L'invention concerne des esters poly(.szlig.-amino) préparés à partir de l'addition de conjugués d'amines (bis)secondaires ou d'amines primaires à un ester de (bis)acrylate. L'invention concerne également des procédés de préparation de ces polymères à partir de produits de départ commercialisés. Ces polymères contenant des amines tertiaires sont, de préférence, biodégradables et biocompatibles et peuvent être utilisés dans une variété de systèmes de délivrance de médicaments. Etant donné leur nature poly(amine), ces polymères sont particulièrement adaptés à la délivrance de polynucléotides. Les nanoparticules contenant des complexes polymère/polynucléotide ont été préparées. Les polymères selon l'invention peuvent également servir à encapsuler d'autres agents à délivrer. Ils sont particulièrement utiles dans la distribution d'agents instables vu leur aptitude à amortir le pH de leur environnement. L'invention concerne enfin un système simultané de préparation et de tamisage de polymères à l'aide de systèmes de délivrance d'un fluide robotique semi-automatisés.

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