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Engineering Stable Lentiviral Vector Producer Cells Improves LVV Production
Jona Röscheise1,2, Lena-Marie Eberle1, Holger Laux3
1Institute of Applied Biotechnology, Biberach University of Applied Sciences, Biberach, Germany.
Researchers identified cellular factors limiting lentiviral vector production in producer cell lines. Engineering these host cells by knocking out specific genes significantly boosted vector yield, offering a scalable manufacturing solution.
Area of Science:
- Biotechnology
- Molecular Biology
- Gene Therapy Manufacturing
Background:
- Stable lentiviral vector producer cell lines are crucial for scalable and cost-effective manufacturing.
- However, intrinsic host-cell limitations often restrict lentiviral vector production (LVV) yield.
Purpose of the Study:
- To identify cellular factors hindering LVV production in stable producer cell lines.
- To assess if targeted host-cell engineering can enhance LVV yield.
Main Methods:
- Comparative transcriptomic analysis of high- and low-producing clones.
- CRISPR/Cas9-mediated gene knockout and overexpression screening in a low-producing clone.
- Functional analysis of candidate genes impacting LVV productivity.
Main Results:
- Transcriptomic analysis revealed differences in transcription, translation, metabolism, lipid homeostasis, stress response, and chromatin regulation pathways.
- Single-gene knockout of H1-2, ADAMTS1, INSIG1, GADD45B, and HSPA1B increased cell-specific LVV productivity up to 2.6-fold.
- H1-2 knockout demonstrated the most significant improvement; combinatorial disruption further enhanced productivity, while overexpression did not.
Conclusions:
- Transcriptomics-guided host-cell engineering is effective for identifying and overcoming bottlenecks in stable LVV producer cell lines.
- Targeted gene knockout strategies can significantly improve lentiviral vector manufacturing efficiency.
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