Pulmonary malarial vaccine

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/51 (2006.01) A61K 9/00 (2006.01) A61K 9/12 (2006.01)

Patent

CA 2565859

Particulate compositions for delivery, preferably pulmonary, which provide sustained release of antigens such as malarial antigens, preferably DNA and/or peptide and/or protein antigens, have been developed. In the preferred embodiment, aggregate nanoparticles are in the aerodynamic range of 1-5 microns diameter and fly deep into the lungs. As the aggregate particles degrade in the body, MSP-1 and AMA-1 proteins are released into the blood stimulating a humoural immune response. The individual particles in the range of 0.1 micron are preferentially phagocytosed by APCs which express the proteins encoded by AMA-1 and MSP-1 plasmid DNA thereby initiating the cellular immune response that is necessary for a complete immunity.

Des composés particulaires à administrer, de préférence par voie pulmonaire, qui libèrent en permanence des antigènes comme les antigènes du paludisme, de préférence des antigènes de protéines et/ou de peptides et/ou d~ADN, ont été développés. Dans la meilleure formulation, les nanoparticules agglomérées ont un diamètre aérodynamique de l~ordre de 1 à 5 microns et vont rapidement loin dans les poumons. À mesure que les particules agrégées se dégradent dans le corps, les protéines MSP-1 et AMA-1 sont libérées dans le sang, stimulant une réponse immunitaire humorale. Les particules individuelles de l~ordre de 0,1 micron sont de préférence phagocytées par les APC qui expriment les protéines encodées par l~ADN plasmidique AMA-1 et MSP-1, déclenchant ainsi la réponse immunitaire cellulaire nécessaire à une immunité totale.

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