EFFECT OF VITREOSCILLA HEMOGLOBIN EXPRESSION ON GROWTH AND SPECIFIC TISSUE-PLASMINOGEN ACTIVATOR PRODUCTIVITY IN RECOMBINANT CHINESE-HAMSTER OVARY CELLS

被引：44

作者：

PENDSE, GJ ^{[1
]}

BAILEY, JE ^{[1
]}

机构：

[1] CALTECH,DEPT CHEM ENGN,PASADENA,CA 91106

来源：

BIOTECHNOLOGY AND BIOENGINEERING | 1994年 / 44卷 / 11期

关键词：

CHO CELLS; CLONED PROTEINS; VHB HEMOGLOBIN;

D O I：

10.1002/bit.260441114

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Previous studies suggest that secretion of cloned proteins synthesized by recombinant Chinese hamster ovary (CHO) cells can be adenosine triphosphate (ATP) limited. Other research indicates that the presence of cloned Vitreoscilla hemoglobin (VHb) enhances ATP production in oxygen-limited Escherichia coli. To evaluate the influence of VHb expression on recombinant CHO cell productivity, the vhb gene has been fused to the mouse mammary tumor virus (MMTV) promoter and cloned in a CHO cell line previously engineered to express human tissue plasminogen activator (tPA). Western blot analysis confirms dexamethasone-inducible VHb expression in all of the clones tested. Batch cultivation experiments with one VHb-expressing clone and the parental CHO-tPA cells show a reduced specific growth rate in the VHb-expressing cells. The VHb-expressing clone exhibits specific tPA production 40 to 100% greater than the parental CHO-tPA culture. (C) 1994 John Wiley and Sons, Inc.

引用

页码：1367 / 1370

页数：4

共 11 条

[1] PROTEIN DISSOCIATION FROM GRP78 AND SECRETION ARE BLOCKED BY DEPLETION OF CELLULAR ATP LEVELS [J].