发明名称 |
Method of producing recombinant ADAMTS13 in cell culture |
摘要 |
Among other aspects, the present invention relates to cell culture conditions for producing high molecular weight vWF, in particular, highly multimericWF with a high specific activity and ADAMTS13 with a high specific activity. The cell culture conditions of the present invention can include, for example, a cell culture medium with an increased copper concentration and/or cell culture supernatant with a low ammonium (NH4+) concentration. The present invention also provides methods for cultivating cells in the cell culture conditions to express high molecular weight vWF and rA13 having high specific activities. |
申请公布号 |
US9458222(B2) |
申请公布日期 |
2016.10.04 |
申请号 |
US201113179399 |
申请日期 |
2011.07.08 |
申请人 |
Baxalta Incorporated;Baxalta GmbH |
发明人 |
Grillberger Leopold;Reiter Manfred;Fleischanderl Daniel;Bramberger Gregor |
分类号 |
C07K14/755;C12N9/64;A61K38/00 |
主分类号 |
C07K14/755 |
代理机构 |
Morgan, Lewis & Bockius LLP |
代理人 |
Morgan, Lewis & Bockius LLP |
主权项 |
1. A method for producing a recombinant ADAMTS 13 (rA13) composition, the method comprising the steps of:
(a) providing a protein free, chemically-defined, basal cell culture media; (b) supplementing the basal cell culture media with copper to provide a final copper concentration of from 2 μg/L to 4 μg/L; (c) providing one or more mammalian cells comprising a nucleic acid encoding a rA13 protein; (d) culturing the one or more mammalian cells in the copper supplemented cell culture media such that rA13 is expressed and excreted from the cells into a culture supernatant, wherein the NH4+ content of the cell culture supernatant is maintained at a concentration below 10 mM; and (e) recovering at least a portion of the culture supernatant, wherein the mammalian cell density is maintained at less than 4.0×106 cells per mL during the step of culturing the one or more cells; and wherein at least 1500 Units FRETS-VWF73 activity per liter supplemented basal cell culture media per day is present in the recovered culture supernatant. |
地址 |
Bannockburn IL US |