Supercritical fluids processing: preparation of protein...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 1/32 (2006.01) C07K 1/30 (2006.01)

Patent

CA 2464308

A process for the co-precipitation of a substance with a stabiliser therefor, by a gas anti solvent process comprising introducing into a particle formation vessel a supercritical fluid pure or mixed with a modifier; and a solution comprising said substance and said stabiliser dissolved in a solvent; so as said solvent is extracted from the solution by said supercritical fluid and co- precipitation of the substance and stabiliser occurs. The process may be carried out using an apparatus comprising a particle formation vessel (22) and a nozzle (27) having a central orifice (39) serving to introduce a solution of the substance and a plurality of outer orifices (41) serving to carry a flow of supercritical fluid into the particle formation vessel (22), such that the solvent is extracted from the solution by the supercritical fluid and precipitation of micron sized particles of the substance/stabilizer occurs. The substance is preferably a protein of pharmaceutical interest, which is highly stabilized for storage by this process.

L'invention concerne un procédé de co-précipitation d'une substance avec un stabilisateur par un procédé antisolvant gazeux qui consiste à introduire dans un récipient de formation particulaire, d'une part, un fluide supercritique pur ou mélangé à un modificateur, d'autre part, une solution comprenant ladite substance et ledit stabilisateur dissous dans un solvant. Ledit solvant est extrait de la solution au moyen dudit fluide supercritique, ce qui entraîne la co-précipitation de la substance et du stabilisateur. Le procédé selon l'invention peut être mis en oeuvre au moyen d'un appareil comprenant un récipient de formation particulaire (22) et d'une buse (27) pourvue d'un orifice central (39) destiné à introduire une solution de la substance et d'une pluralité d'orifices extérieurs (41) servant à transporter un flux de fluide supercritique dans le récipient de formation particulaire (22), de sorte que le solvant est extrait de la solution au moyen du fluide supercritique et que la précipitation de particules de l'ordre du micromètre de la substance/stabilisateur se produit. La substance est de préférence une protéine d'intérêt pharmaceutique, qui est hautement stabilisée à des fins de stockage au moyen du procédé selon l'invention.

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