Powder compositions

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/00 (2006.01) A61K 9/16 (2006.01) A61K 39/39 (2006.01)

Patent

CA 2412197

A gel-forming free-flowing powder suitable for use as a vaccine is prepared by spray-drying or spray freeze-drying an aqueous suspension that contains an antigen adsorbed to an aluminum salt or calcium salt adjuvant, a saccharide, an amino acid or a salt thereof, and a colloidal substance. Powder for vaccine purposes are also prepared by spray freeze-drying an aqueous suspension of such an adjuvant having an antigen adsorbed therein. Processes for forming these powder compositions are also described, as well as methods of using the compositions in a vaccination procedure.

L'invention concerne une poudre fluide formant un gel, pouvant convenir comme vaccin, préparée par séchage par pulvérisation ou par lyophilisation avec pulvérisation d'une suspension aqueuse qui contient : un antigène adsorbé sur un sel d'aluminium ou sur un adjuvant de sel de calcium, un saccharide, un acide aminé ou un sel de celui-ci, et une matière colloïdale. La poudre, destinée à des applications vaccinales, peut aussi être préparée par lyophilisation avec pulvérisation d'une suspension aqueuse d'un tel adjuvant contenant un antigène adsorbé. L'invention concerne aussi des procédés permettant de former ces compositions de poudre, ainsi que des procédés d'utilisation des compositions dans une procédure de vaccination.

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