Process for preparing particles of proteinaceous material

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 1/02 (2006.01) A61K 38/38 (2006.01) A61K 38/40 (2006.01) A61K 39/395 (2006.01) A61K 51/08 (2006.01) C07K 1/08 (2006.01) C07K 1/10 (2006.01)

Patent

CA 2657277

Protein particles are prepared by causing or allowing protein molecules dispersed in a liquid medium at a concentration of 8mg.mL-1 or greater to react in the presence of a zero-length crosslinker, so as to produce protein particles comprising protein molecules that are covalently bonded together. The protein particles may be produced with sizes in the sub-micron range with closely defined sizes and size distributions. The particles have applications in many fields, but are useful inter alia for the delivery of therapeutic agents and other agents, eg imaging contrast agents, to the body.

Des particules protéiques sont préparées en faisant en sorte, ou en permettant, que des molécules protéiques dispersées dans un milieu liquide à une concentration supérieure ou égale à 8 mg.ml-1 réagissent en présence d'un agent de réticulation de longueur nulle, de façon à produire des particules protéiques comprenant des molécules protéiques liées entre elles par des liaisons covalentes. Il est possible de produire des particules protéiques d'une taille inférieure au micron, présentant une taille et une distribution granulométrique bien définies. Ces particules peuvent être utilisées dans de nombreux domaines, mais se révèlent utiles, entre autres, pour la délivrance d'agents thérapeutiques et d'autres agents, par exemple des produits de contraste utilisés en imagerie, en direction de l'organisme.

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