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Chinese hamster ovary (CHO) cells are the preferred cell factory for the production of therapeutic glycoproteins. Although efforts primarily within bioprocess optimization have led to increased product titers of recombinant proteins (r-proteins) expressed in CHO cells, post-transcriptional bottlenecks in the biosynthetic pathway of r-proteins remain to be solved. To this end, the ectopic expression of transgenes (effector genes) offers great engineering potential. However, studies on effector genes have in some cases led to inconsistent results. Whereas this can in part be attributed to product specificity, other experimental and cellular factors are likely important contributors to these conflicting results. Here, these factors are reviewed and discussed with the objective of guiding future studies on effector genes.
Original languageEnglish
JournalBiotechnology Advances
Volume35
Issue number1
Pages (from-to)64–76
Number of pages35
ISSN0734-9750
DOIs
StatePublished - 2017
CitationsWeb of Science® Times Cited: 2

    Keywords

  • Cell engineering, Chinese hamster ovary (CHO) cells, ER stress, Ectopic expression, Endoplasmic reticulum, Gene dosage, Product quality, Recombinant protein production, Secretion bottleneck, Specific productivity
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