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Effect of vitreoscilla hemoglobin expression on growth and specific tissue plasminogen activator productivity in recombinant chinese hamster ovary cells
Author(s) -
Pendse Girish J.,
Bailey James E.
Publication year - 1994
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260441114
Subject(s) - chinese hamster ovary cell , recombinant dna , biology , microbiology and biotechnology , clone (java method) , cell culture , t plasminogen activator , plasminogen activator , activator (genetics) , gene , tissue plasminogen activator , biochemistry , genetics
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 expressing cells. The VHb‐expressing clone exhibits specific tPA production 40 to 100% greater than the parental CHO‐tPA culture. © 1994 John Wiley & Sons, Inc.