在蛋白质A膜染色学中,在接近中性的pH值下,洗剂诱导的抗体化
Oussama Menouar Menari1, Peter Menstell2, Supriyadi Hafiz2
1Institute for Biochemistry, Technical University of Applied Sciences Mannheim, Germany.
Journal of chromatography. A
|February 22, 2026
概括
一种新型洗剂提高了单克隆抗体 (mAb) 捕获的蛋白A染色学化 pH,通过实现近中性化条件,显著改善了产品的回收和稳定性.
科学领域:
- 生物技术是生物技术.
- 蛋白质化学 蛋白质化学
- 生物制药制造业 生物制药制造业
背景情况:
- 蛋白A亲和色谱是单克隆抗体 (mAb) 净化标准.
- 通常使用的低pH化 (pH3-4) 可能会对mAb稳定性产生负面影响,导致聚合和活动丧失.
- 开发更温和的化方法对于保持mAb完整性至关重要.
研究的目的:
- 为了评估在膜平台上的重组蛋白A (rProtein A) 连接体,以获得更高的pH化.
- 调查使用病毒无活化洗剂以进一步增加化pH值.
- 评估辅助剂驱动的化对mAb恢复和稳定性的影响.
主要方法:
- 在膜染色学平台上使用了重组蛋白A配体.
- 包含一个基链氨氧化物清洁剂,用于病毒无活化和pH调节.
- 在不同的pH值下与洗剂或不使用洗剂进行化效率和产品回收的比较.
- 评估了洗剂的特异性和对不同化条件和蛋白质A连接物变体的影响.
主要成果:
- 重组蛋白A配体支持更高的基线化pH (4-5).
- 添加洗剂增加了近乎中性范围 (5.5-6.5) 的化pH值.
- 在pH值为5.5的情况下,mAb的回收率从29.2%增加到99.5%,使用洗剂.
- 在pH 6下,回收仍然很高 (>90%) ,即使在化前去除洗剂时也显著.
结论:
- 辅助剂驱动的化显著提高了mAb在蛋白质A染色学期间的恢复和稳定性.
- 接近中性化条件减轻了与低pH化相关的聚合和活性损失的风险.
- 这种方法提供了一种更温和的净化策略,并有可能在亲和力捕获中实现综合性病毒失活.
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