ArticleScientific reports2018
Human rhinovirus internal ribosome entry site element enhances transgene expression in transfected CHO-S cells.
Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- AAV-mediated peripheral scFv's administration to reduce cerebral tau in adult P301S transgenic mice: Mono-vs. combination therapy.Molecular therapy. Methods & clinical development · 2025Article
- Cell factory engineering: Challenges and opportunities for synthetic biology applications.Biotechnology and bioengineering · 2023Review
- Increase recombinant antibody yields through optimizing vector design and production process in CHO cells.Applied microbiology and biotechnology · 2022Article
- Enhanced Transgene Expression by Optimization of Poly A in Transfected CHO Cells.Frontiers in bioengineering and biotechnology · 2022Article
- Progress of Transposon Vector System for Production of Recombinant Therapeutic Proteins in Mammalian Cells.Frontiers in bioengineering and biotechnology · 2022Review
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Authors and funding
6 authors.
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Abstract
Chinese hamster ovary (CHO) cells are mainly used for recombinant protein production. However, the unstable transgene expression and lower transgene copy numbers are the major issues need to be resolved. Here, eleven internal ribosome entry site (IRES) elements from viral and cellular IRES were evaluated for foreign gene expression in CHO-S cells. We constructed eleven fusing plasmids containing different IRES sequences downstream of the enhanced green fluorescent protein (EGFP) gene. EGFP expression was detected by flow cytometry and the transgene copy number was evaluated by quantitative PCR. The erythropoietin (EPO) protein was also used to assess the stronger IRES. The results showed that IRES from human rhinovirus (HRV) exhibited the highest EGFP expression level under transient and stable transfections. The EGFP expression level of vector with IRES from HRV was related to the gene copy number in stably transfected CHO-S cells. Moreover, IRES from HRV induced higher expression level of EPO compared with one mutant IRES from EMCV in transfected cells. In conclusion, IRES from HRV can function as a strong IRES element for stable expression in CHO-S cells, which could potentially guide more effective foreign gene expression in CHO-S cells.
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