Oral controlled release system for targeted drug delivery...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/14 (2006.01) A61K 9/127 (2006.01) A61K 9/50 (2006.01) A61K 9/51 (2006.01) A61K 9/52 (2006.01) A61K 9/56 (2006.01) A61K 9/58 (2006.01) A61K 9/62 (2006.01)

Patent

CA 2557983

The present invention relates to an oral drug delivery system which delivers pharmaceutical active ingredients into the cell and/or its nucleus for the effective administration of nucleic acids including gene therapy, vaccination, administration of gene based drugs or administration of gene based treatment modalities, including the use of sense, antisense nucleotide sequences, antigens, antibodies, ribozymes, as well as oligonucleotides and polynucleotide constructs for gene correction. These actives may also include viruses, vectors, proteins, peptides, and nucleic acids, DNA or RN fragments, which code functionally active or inactive or conditionally inactivatable proteins. The controlled delivery system of the present invention is substantially a free-flowing powder consisting of solid hydrophobic nanospheres encapsulated in pH sensitive microspheres. The controlled release system can be used to target and control the release of pharmaceutical active ingredients onto certain regions of the gastrointestinal tract, specially the small intestine. The invention further pertains to pharmaceutical products comprising the controlled release system of the present invention.

La présente invention a trait à un système d'administration orale de médicaments qui assure la pénétration de principes actifs pharmaceutiques dans la cellule et/ou son noyau pour l'administration efficace d'acides nucléiques comprenant la thérapie génétique, la vaccination, l'administration de médicaments à base de gènes ou l'administration de modalités de traitement à base de gènes, comprenant l'utilisation de séquences nucléotidiques sens, antisens, des antigènes, des anticorps, des ribozymes, ainsi que des constructions d'oligonucléotides et de polynucléotides pour la correction génétique. Ces principes actifs peuvent comporter des virus, des vecteurs, des protéines, des peptides, et des acides nucléiques, de fragments d'ADN ou d'ARN, codant pour des protéines fonctionnellement actives ou inactives et d'inactivation conditionnelle. Le système d'administration de la présente invention est une poudre sensiblement fluide constituée de nanosphères hydrophobes solides encapsulées dans des microsphères sensibles au pH. Le système de libération contrôlée peut également être utilisée pour le ciblage et le contrôle de la libération de principes actifs pharmaceutiques sur certaines régions de la voie gastro-intestinale, particulièrement l'intestin grêle. La présente invention a trait en outre à des produits pharmaceutiques comportant le système de libération contrôlée de la présente invention.

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