Microparticles for delivery of the heterologous nucleic acids

Details Microparticles for delivery of the heterologous nucleic acids Microparticles for delivery of the heterologous nucleic acids

A - Human Necessities

61

K

A61K 9/00 (2006.01) A61K 9/107 (2006.01) A61K 9/16 (2006.01) A61K 9/51 (2006.01) A61K 39/00 (2006.01) A61K 39/21 (2006.01) A61K 47/48 (2006.01) C12N 15/86 (2006.01)

Patent

CA 2421683

Microparticles with adsorbent surfaces, methods of making such microparticles, and uses thereof, are disclosed. The microparticles comprise a polymer, such as a poly(.alpha.-hydroxy acid), a polyhydroxy butyric acid, a polycaprolactone, a polyorthoester, a polyanhydride, and the like, and are formed using cationic, anionic, or nonionic detergents. Also provided are microparticles in the form of submicron emulsions of an oil droplet emulsion having a metabolizable oil and an emulsifying agent. The surface of the microparticles efficiently adsorb polypeptides, such as antigens, and nucleic acids, such as ELVIS vectors and other vector constructs, containing heterologous nucleotide sequences encoding biologically active macromolecules, such as polypeptides, antigens, and adjuvants. Methods of stimulating an immune response, methods of immunizing a host animal against a viral, bacterial, or parasitic infection, and uses of the microparticle compositions for vaccines are also provided.

L'invention porte sur des microparticules présentant des surfaces absorbantes, et sur des méthodes de production et d'utilisation desdites microparticules. Les microparticules de l'invention comprennent un polymère, tel qu'un poly(.alpha.-hydroxyacide), un acide butyrique polyhydroxylé, un polycaprolactone, un polyorthoester, un polyanhydride et analogue, et sont formées avec des détergents cationiques, anioniques ou non anioniques. L'invention concerne également des microparticules sous forme d'émulsions submicroniques d'une émulsion de globules d'huile comportant une huile métabolisée et un agent dispersant. La surface des microparticules adsorbe efficacement des polypeptides tels que des antigènes, et des acides nucléiques tels que des vecteurs ELVIS ou autres constructions vecteurs contenant des séquences nucléotidiques hétérologues codant des macromolécules biologiquement actives, telles que des polypeptides, des antigènes et des adjuvants. L'invention porte en outre sur des méthodes de stimulation d'une réponse immune et sur des méthodes d'immunisation d'un animal hôte contre une infection virale, bactérienne ou parasitaire. Elle porte enfin sur l'utilisation des compositions microparticulaires de l'invention dans des vaccins.

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