Process for purifying interferon beta

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 14/565 (2006.01)

Patent

CA 2548165

Provided is a process for purifying human interferon beta from a recombinant human interferon beta-containing culture comprising performing affinity chromatography and cation exchange chromatography, wherein the affinity chromatography includes: adsorbing the interferon beta-containing culture to an equilibrated affinity chromatography column, followed by washing with an equilibration buffer solution; washing the column with a washing buffer solution A of pH 6.5-7.5 containing 30-60 wt% of propylene glycol and a washing buffer solution B of pH 6.5-7.5 containing 10-30 wt% of propylene glycol and 1-2M NaCl; and eluting a human interferon beta-containing fraction with a buffer solution of pH 6.5-7.5 containing 40-60 wt% of propylene glycol and 1-2M NaCl.

L'invention concerne un procédé destiné à la purification de l'interféron bêta humain à partir d'une culture contenant un interféron bêta humain recombinée, consistant à réaliser une chromatographie d'affinité et une chromatographie d'échange cationique. La chromatographie d'affinité consiste : à adsorber la culture contenant l'interféron bêta dans une colonne de chromatographie d'affinité équilibrée, à la laver avec une solution tampon d'équilibrage ; à laver la colonne avec une solution tampon de lavage A de pH 6,5-7,5 contenant 30-60 % en masse de propylène glycol et une solution tampon de lavage B de pH 6,5-7,5 contenant 10-30 % en masse de propylène glycol et du NaCl 1-2M ; et à éluer une fraction contenant l'interféron bêta humain avec une solution tampon à pH 6,5-7,5 contenant 40-60 % en masse de propylène glycol et du NaCl 1-2M.

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