低效的转录是人工治疗BiTE®蛋白质的生产瓶
Tobias Jerabek1, Madina Burkhart1, Selina Goetz2
1Institute of Applied Biotechnology, University of Applied Sciences Biberach, Hubertus-Liebrecht-Str. 35, 88400 Biberach an der Riss, Germany.
New biotechnology
|December 28, 2023
概括
难以表达的双特异性T细胞吸引剂 (BiTE®) 分子由于低转录率而降低了mRNA水平. 修改DNA序列显著改善了转录,为复杂的治疗性蛋白质生产提供了战略.
科学领域:
- 生物制药生产 生物制药生产
- 蛋白质工程是一种蛋白质工程.
- 分子生物学分子生物学
背景情况:
- 抗体是重要的生物制药,复杂的格式,如双特异性T细胞参与剂 (BiTE®) 在癌症治疗中变得越来越重要.
- 这些复杂的模式,包括半衰期延长 (HLE) BiTE®和HLE双准双特异性T细胞吸引剂 (dBiTE) 分子,往往存在表达挑战 (难以表达,DTE).
研究的目的:
- 研究人工治疗性蛋白质的稳定细胞系生产中的分子瓶,特别是HLE BiTE®和HLE dBiTE分子.
- 确定BiTE®分子生产中细胞内mRNA水平降低的根本原因.
主要方法:
- 在稳定的细胞系中分析了重组蛋白质生产的所有步骤.
- 使用体外转录 (IVT) 试验来评估mRNA转录率.
- 研究了DNA序列调制对转录效率的影响.
主要成果:
- 显著减少的细胞内mRNA水平被确定为一个关键的瓶.
- 证实BiTE®分子编码mRNA的低转录率是原因.
- BiTE®分子的人工结构不是限制速度的因素;DNA序列调制显著改善了IVT速率.
结论:
- 提供了对HLE BiTE®和HLE dBiTE分子的生产挑战的见解,可能适用于其他DTE蛋白.
- 确定DNA序列优化作为克服转录瓶的战略.
- 为改善复杂的治疗蛋白质的可制造性提供了潜在的途径.
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