Methods of purifying small modular immunopharmaceutical...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 1/18 (2006.01) C07K 16/18 (2006.01) C07K 16/28 (2006.01) C07K 16/46 (2006.01)

Patent

CA 2751000

The present invention provides, among other things, methods of purifying or recovering proteins, in particular, small modular immunopharmaceutical (SMIP s TM) proteins, from protein preparations containing high molecular weight (HMW) aggregates and other impurities based on hydroxyapatite chromatography. In some embodiments, the hydroxyapatite chromatography is used in combination with affinity chromatography and/or ion exchange chromatography. In some embodiments, inventive methods according to the invention involve no more than three chromatography steps. The present invention also provides proteins such as SMIP S TM purified according to the invention and pharmaceutical compositions containing the same.

La présente invention porte, entre autres choses, sur des procédés de purification ou de récupération de protéines, en particulier, des petites protéines immunopharmaceutiques modulaires (SMIPs), à partir de préparations de protéine contenant des agrégats de poids moléculaire élevé (HMW) et d'autres impuretés, sur la base d'une chromatographie d'absorption sur gel d'hydroxyapatite. Dans certains modes de réalisation, la chromatographie d'absorption sur gel d'hydroxyapatite est utilisée en combinaison avec une chromatographie d'affinité et/ou une chromatographie d'échange d'ions. Dans certains modes de réalisation, les procédés inventifs selon l'invention mettent en jeu pas plus de trois étapes de chromatographie. La présente invention porte également sur des protéines telles que des SMIPs purifiées selon l'invention et sur des compositions pharmaceutiques les contenant.

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