开发一种用于再生生物活性蛋白的新型细菌生产系统,完全不受内毒素污染的影响
Go Kamoshida1,2, Daiki Yamaguchi2, Yuki Kaya2
1Department of Infection Control Science, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
PNAS nexus
|August 20, 2024
概括
这项研究引入了一种新的无内毒素重组蛋白质生产系统,使用缺乏LPS的Acinetobacter baumannii. 该平台显著减少内毒素污染,使功能性蛋白质和抗体的净化.
科学领域:
- 生物技术是生物技术.
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 内毒素 (脂聚糖,LPS) 是细菌重组蛋白生产中的关键污染物.
- 像Acinetobacter baumannii这样的グラム阴性细菌通常表达LPS,这对无内毒素蛋白质净化构成了挑战.
- A. baumannii表现出一种独特的LPS缺陷表型,为无内毒素表达提供了一个潜在的解决方案.
研究的目的:
- 开发和验证一种新的细菌表达系统,用于生产无内毒素重组蛋白质.
- 为了证明缺乏LPS的A. baumannii在减少内毒素污染方面的有效性.
- 通过净化各种功能性蛋白质和抗体来展示系统的多功能性.
主要方法:
- 利用缺乏LPS的Acinetobacter baumannii用于重组蛋白质表达.
- 使用Omp38信号用于细胞外蛋白质的生产.
- 纯化的功能性蛋白质包括绿色光蛋白,瘤亡因子α和VHH抗体 (mNb6-tri-20aa,ozoralizumab).
- 使用已确定的测定方法量化内毒素减少.
主要成果:
- 与传统系统相比,可以显著减少内毒素污染 (高达10^5倍).
- 成功净化无内毒素的功能绿色光蛋白和瘤亡因子-alpha.
- 从培养超体中生产和净化功能性VHH抗体,包括抗SARS-CoV-2尖端蛋白抗体和类风湿性关节炎药物ozoralizumab.
- 在病毒中和试验中证明了纯化的抗体的功能.
结论:
- 建立了一个新的,完全无内毒素的细菌平台,用于重组蛋白质表达.
- 该系统通过消除内毒素污染,为传统方法提供了显著的优势.
- 这一平台有望生产治疗性蛋白质,抗体和其他需要高纯度的生物制剂.
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