半氨酸反应性分析揭示了单克隆抗体二硫化物结合降低机制在生物制药过程中中间体
Taku Tsukidate1, Zhenshu Wang2, Andrew Hsieh2
1Analytical Research & Development Mass Spectrometry, Merck & Co., Inc., 126 East Lincoln Avenue, Rahway, New Jersey 07065, United States.
Journal of the American Society for Mass Spectrometry
|September 12, 2025
概括
这项研究开发了一种化学蛋白质学工作流程,以了解在中国仓鼠卵巢 (CHO) 细胞生产过程中,单克隆抗体 (mAbs) 中二硫化键如何减少. 这些发现揭示了参与这种减少过程的关键酶,有助于生物治疗制造.
科学领域:
- 生物化学 生物化学
- 蛋白质组学是指蛋白质组学.
- 生物制药制造业 生物制药制造业
背景情况:
- 单克隆抗体 (mAbs) 是面对全球需求上升的重要生物治疗药物.
- 降低二硫化物键对中国仓鼠卵巢 (CHO) 细胞培养液的mAb产生和稳定性产生影响.
- 了解二硫化物键减少的机制对于优化mAb制造至关重要.
研究的目的:
- 阐明CHO细胞产生的mAbs中二硫化键减少的机制.
- 开发和应用化学蛋白质学工作流程,用于氨酸反应性概况.
- 确定有助于减少收获细胞培养液 (HCCF) 中的二硫化键的酶.
主要方法:
- 使用乙胺-脱生物 (IA-DTB) 进行囊标签.
- 在定量蛋白质组学中使用并行积累和串行碎片结合数据独立获取 (diaPASEF).
- 分析了来自HCCF的大约4,500种含氨酸的.
主要成果:
- 在HCCF中识别了活性蛋白二硫化氧降解酶,揭示了细胞的氧化还原环境.
- 含有蛋白质的葡萄糖素和铁素域等酶中的量化特定的氨酸残留物 12.
- 证明了工作流的能力,以补充丰富的蛋白质组学和评估酶功能.
结论:
- 开发的化学蛋白质组学工作流提供了关于mAb生产中的二硫化物键减少机制的见解.
- 酶活性,特别是特定的氧化还原酶,与mAb二硫化物键动态有关.
- 这种方法提供了一种策略,通过了解和控制氧化还原环境来改善mAb制造工艺.
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