Biofunctional hydroxyapatite coatings and microspheres for...

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 25/32 (2006.01) A61K 6/06 (2006.01) A61K 9/00 (2006.01) A61K 9/16 (2006.01) A61K 47/02 (2006.01) C04B 28/34 (2006.01) C04B 40/00 (2006.01) C04B 41/50 (2006.01) C04B 41/67 (2006.01) C09D 1/00 (2006.01) C09D 129/04 (2006.01) C23C 30/00 (2006.01) C30B 29/14 (2006.01)

Patent

CA 2444561

This invention relates to novel room-temperature process for obtaining calcium phosphate, in particular hydroxyapatite, coatings and microspheres that encapsulate drugs, proteins, genes, DNA for therapeutical use. The coatings and microspheres are designed to perform a defined biological function related to drug delivery, such as gene therapy through gene delivery. A novel method for encapsulation, and subsequent controlled release of therapeutically active agents from such biofunctional coatings and microspheres is disclosed. Such coatings and microspheres are useful for side-effects free, long-term, targeted, controlled release and delivery of drugs, proteins, DNA, and other therapeutic agents.

L'invention a trait à un nouveau procédé à température ambiante permettant d'obtenir du phosphate de calcium, en particulier de l'hydroxyapatite, à des revêtements et à des microsphères destinées à encapsuler des médicaments, des protéines, des gènes et de l'ADN, à des fins thérapeutiques. Les revêtements et microsphères selon l'invention sont conçus pour remplir une fonction biologique déterminée, liée à l'administration de médicaments, telle que la thérapie génique par l'apport de gènes. L'invention concerne également un nouveau procédé d'encapsulation, ainsi que la libération régulée ultérieure d'agents thérapeutiquement actifs à partir desdits revêtements et microsphères biofonctionnels. Ces revêtements et microsphères sont utiles dans la libération et l'administration régulées, ciblées, à long terme et sans effets secondaires, de médicaments, de protéines, d'ADN et d'autres agents thérapeutiques.

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