Enhanced production of anti-PD1 antibody in CHO cells through transient co-transfection with anti-apoptotic genes Bcl-x L and Mcl-1
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Apoptosis has a negative impact on the cell survival state during cell cultivation. To optimize mammalian cell culture for production of biopharmaceuticals, one of the important approaches is to extend cell life through over-expression of anti-apoptotic genes. Here, we reported a cost-effective process to enhance cell survival and production of an antibody through transient co-transfection with anti-apoptotic genes Bcl-x L or Mcl-1 in Chinese hamster ovary (CHO) cells with polyethylenimine (PEI). Under the optimal conditions, it showed reduced levels of apoptosis and improved cell viability after co-transfected with Bcl-x L or Mcl-1. The overall production yield of the antibody anti-PD1 increased approximately 82% in CHO cells co-transfected with Bcl-x L , and 34% in CHO cells co-transfected with Mcl-1. This work provides an effective way to increase viability of host cells through delaying apoptosis onset, thus, raise production yield of biopharmaceuticals without the process of generating stable cell lines and subsequent screening.
KeywordsAnti-apoptosis Bcl-xL Chinese hamster ovary cell Mcl-1 Transient gene expression
This project was supported by Natural Science Foundation of Shanghai [Grant No. 15ZR1423800].
Compliance with ethical standards
Conflict of interest
All the authors reviewed and agreed to submit this manuscript. The authors declare that they have no conflict of interest.
Research involving human participants and/or animals
The study does not contain experiments using animals and human studies.
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