在CHO细胞中使用具有雌激素结合域的人工转录激活剂诱导转基因表达
Md Rashidur Rahman1, Yoshinori Kawabe1, Kozumi Suzuki1
1Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan.
Biotechnology journal
|December 31, 2023
概括
这项研究引入了一种新的系统,用于控制中国仓鼠卵巢 (CHO) 细胞中的生物制药生产. 该技术精确地乘以重组蛋白的表达,使治疗抗体的高效和连续制造成为可能.
科学领域:
- 生物技术是生物技术.
- 细胞生物学 细胞生物学
- 生物制药制造业 生物制药制造业
背景情况:
- 哺乳动物细胞,特别是中国仓鼠卵巢 (CHO) 细胞,对于生产治疗抗体等复杂生物制药至关重要.
- 目前的重组蛋白质生产通常依赖于细胞生长,从而使生产时间的精确控制具有挑战性.
研究的目的:
- 在CHO细胞中开发可控制的基因表达系统,用于生物制药生产.
- 为了使可诱导和定时生成重组蛋白质,包括治疗抗体.
主要方法:
- 使用基于雌激素受体的人工基因表达系统的工程 CHO 细胞.
- 使用特定的诱导药物,如4-hydroxytamoxifen,对基因表达 (GFP和scFv-Fc) 的受控诱导.
- 对细胞增殖和转基因表达的评估,以应对不同的诱导度.
主要成果:
- 该系统成功控制了CHO细胞的增殖和转基因表达.
- 4-氧他莫西芬被证明是非常有效的,诱导高基因表达在明显低于β- Estradiol的度.
- 连续生产一个单链抗体片段 (scFv-Fc) 超过两周,实现了高的特异性生产率 (57 pg细胞-1天-1).
结论:
- 基于雌激素受体的人工基因表达系统为可诱导生物制药生产提供了有效的控制.
- 这项技术促进了复杂的治疗蛋白质的精确定时和连续制造.
- 开发的系统有望优化生物制药生产流程.
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