Process of purification of hcg and recombinant hcg purified...

C - Chemistry – Metallurgy – 07 – K

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C07K 1/36 (2006.01) C07K 14/59 (2006.01)

Patent

CA 2399020

A process for the purification of recombinant human Chorionic Gonadotropin (hCG) from a sample of crude recombinant hCG in the supernatant of CHO cells comprises the combined use of ion-exchange chromatography and reverse phase HPLC. The ion-exchange chromatography is performed twice and the final use of a size exclusion chromatography allows the purification from any residual traces of contaminants. The specific bioactivity of the highly purified hCG obtained from the process is particularly high, amounting to about 25.000 IU/mg.

L'invention se rapporte à un procédé de purification de gonadotrophine chorionique humaine (hCG) recombinée à partir d'un échantillon de hCG recombinée brute présent dans le surnageant de cellules CHO. Ledit procédé consiste à utiliser de manière combinée une chromatographie par échange d'ions et une chromatographie liquide à haute performance en phase inverse. La chromatographie par échange d'ions est effectuée deux fois et la mise en oeuvre finale d'une chromatographie par exclusion de taille permet la purification par extraction de toute trace résiduelle de contaminants. La bioactivité spécifique de la hCG hautement purifiée obtenue au moyen de ce procédé est particulièrement élevée et peut atteindre jusqu'à 25000 IU/mg environ.

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