From cell clones to recombinant protein product heterogeneity in Chinese hamster ovary cell systems
Abstract
Chinese hamster ovary (CHO) cells are commonly used to produce recombinant therapeutic proteins (RTPs). The yield of RTPs in CHO cells has been greatly improved through cell editing and optimization of culture media, cell culture processes, and expression vectors. However, the heterogeneity of cell clones and product aggregation considerably affect the yield and quality of RTPs. Recently, novel technologies such as semi-targeted and site-specific transgene integration, endoplasmic reticulum-residents, and cell culture process optimization have been used to address these issues. In this review, novel developments in the field of CHO cell expression system heterogeneity are summarized. Moreover, the advantages and limitations of the new strategies are discussed, and important methods for the control of RTP quality are outlined.
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Recombinant proteins, including growth factors, may exhibit batch-to-batch variability arising from differences in expression systems, host cell biology, post-translational modifications or manufacturing conditions.
“Recombinant proteins, including growth factors, may also exhibit batch-to-batch variability arising from differences in expression systems, host cell biology, post-translational modifications or manufacturing conditions (O'Flaherty et al., 2020; Wang et al., 2025).”
From Challenges and solutions in transitioning to animal-free standards: a comprehensive analysis of components in human cell-based developmental neurotoxicity assays (2026) · cites this paper as Wang et al., 2025
Section 2.3 reports that instability in CHO cell lines can lead to variation in recombinant-protein yield and quality, while Sections 2.4 and 3.2 describe effects of culture conditions and post-translational modifications. The paper focuses on CHO systems; the passages found do not establish batch-to-batch variability specifically, address differences between expression systems, or identify growth factors as an example. (LLM, conf=0.83)
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Therapeutic protein aggregation: mechanisms, design, and control
Roberts, C. J. (2014) · Trends in Biotechnology · doi:10.1016/j.tibtech.2014.05.005 · Cited by 455 · see citing works
Ha, T. K., Kim, D., Kim, C. L., Grav, L. M., & Lee, G. M. (2022) · Biotechnology Advances · doi:10.1016/j.biotechadv.2021.107831 · Cited by 74 · see citing works
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Cited by
Sorted by citations
Spänle, J. V., Haiber, L. M., & Seeger, B. (2026) · Frontiers in Toxicology · doi:10.3389/ftox.2026.1800157 · Cited by 1 · see citing works
- Authors
- Wang, C., Guo, X., Wang, W., Li, J.-X., & Wang, T.-Y.
- Affiliations
- School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China
- School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China
- International Joint Laboratory of Recombinant Pharmaceutical Protein Expression System of Henan, Xinxiang Medical University, Xinxiang 453003, China
- Venue
- International Journal of Molecular Sciences
- Publisher
- MDPI AG
- Published
- 2025-02-04
- Volume
- 26
- Issue
- 3
- Pages
- 1324
- ISSN
- 1422-0067
- PMC
- PMC11818180
- Cited by
- 6
- References
- 2
- Language
- en
- Funders
- National Natural Science Foundation of China (U23A20270)
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