Immunogenic compositions based on microparticles comprising...

A - Human Necessities – 61 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61K 9/50 (2006.01) A61K 9/02 (2006.01) A61K 9/08 (2006.01) A61K 9/16 (2006.01) A61K 39/12 (2006.01)

Patent

CA 2528007

Immunogenic compositions comprising microparticles with adsorbed toxoid antigen and/or polysaccharide-containing antigen are disclosed. The immunogenic microparticle compositions comprising (a) polymer microparticles comprising a biodegradable polymer; (b) an antigen adsorbed to the microparticles selected from (i) a toxoid antigen, such as a tetanus toxoid, a diphtheria toxoid, or a combination thereof, and/or (ii) a polysaccharide containing antigen, such as a Hib polysaccharide antigen, a Hib conjugate antigen comprising polysaccharide and polypeptide regions, a meningococcal polysaccharide antigen, a meningococcal conjugate antigen comprising polysaccharide and polypeptide regions, a pneumococcal polysaccharide antigen, and a pneumococcal conjugate antigen comprising poysaccharide and polypeptide regions or a combination thereof; and (c) a pharmaceutically acceptable excipient. The biodegradable polymer can be, for example, a polymer selected from a poly(.alpha.-hydroxy acid), a polyhydroxy butyric acid, a polycaprolactone, a polyorthoester, a polyanhydride, and a polycyanoacrylate. Also disclosed are methods of immunization against infection by a pathogenic organisms and methods stimulating immune responses, which comprise administering such compositions to host animals. Methods of producing such microparticle compositions are also disclosed which comprise forming a water- in-oil-in-water emulsion that contains water, organic solvent and biodegradable polymer, followed by removal of the organic solvent from the emulsion to form microparticles, after which toxoid and/or polysaccharide containing antigens are adsorbed on the microparticles.

L'invention concerne des compositions immunogènes contenant des microparticules à antigènes contenant de l'anatoxine adsorbée et/ou des polysaccharides. Les compositions de microparticules immunogènes contiennent (a) des microparticules polymères contenant un polymère biodégradable; (b) un antigène adsorbé par les microparticules sélectionnées parmi (i) un antigène d'anatoxine, notamment une anatoxine tétanique, une anatoxine diphtérique, ou une combinaison de ceux-ci et/ou (ii) un antigène contenant des polysaccharides, notamment un antigène à polysaccharide Hib, un antigène Hib conjugué contenant des zones polypeptides et polysaccharides, un antigène à polysaccharides méningococciques, un antigène méningococcique conjugué contenant des zones polypeptides et polysaccharides, un antigène à polysaccharides pneumococciques, et un antigène pneumococcique conjugué comprenant des zones polypeptides et polysaccharides ou une combinaison de ceux-ci; et (c) un excipient acceptable sur le plan pharmaceutique. Le polymère biodégradable peut être, par exemple, un polymère choisi parmi un acide polyhydroxylé, un acide polyhydroxy butyrique, un polycaprolactone, un polyorthoester, un polyanhydride, et un polycyanoacrylate. L'invention concerne également des procédés d'immunisation contre les infections par des organismes pathogènes et des procédés de stimulation des réponses immunitaires, qui consistent à administrer ces compositions à des animaux hôtes. L'invention concerne enfin des procédés de production de ces compositions à microparticules par formation d'une émulsion eau dans huile dans eau contenant de l'eau, du solvant organique et un polymère biodégradable, puis par élimination du solvant organique de l'émulsion afin de former les microparticules, après quoi les antigènes contenant des polysaccharides et/ou de l'anatoxine sont adsorbées sur les microparticules.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Immunogenic compositions based on microparticles comprising... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Immunogenic compositions based on microparticles comprising..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Immunogenic compositions based on microparticles comprising... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2019375

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.