在分析抗体氧化稳定性的背景下对化剂进行比较评估
Poulami Majumder1, Sara M Eslami1, Allison L Dill1
1Bioproducts Research and Development, Lilly Technology Center North, Eli Lilly & Company, Indianapolis, IN 46221, United States.
Journal of pharmaceutical sciences
|May 9, 2025
概括
抗体的氧化会影响它们的安全性和有效性. 在样本准备过程中使用EGTA可以最大限度地减少氧化,改善抗体分析并增加吞吐量.
科学领域:
- 生物制药学分析分析
- 蛋白质化学 蛋白质化学
- 分析化学是一种分析化学.
背景情况:
- 抗体氧化是一种关键的翻译后修饰,影响安全性,疗效,清除和免疫性.
- 氧化氨酸和氨酸残留物很常见,需要强有力的控制策略.
- 逆相HPLC是量化抗体氧化的一种标准方法.
研究的目的:
- 调查样品氧化对抗体分析方法的影响.
- 为了评估金属合剂在样本准备过程中最小化氧化.
- 为了改善抗体氧化分析,确定乙烯基二胺三酸 (EDTA) 的替代品.
主要方法:
- 酶性消化和抗体子单位 (LC,Fc,Fd) 的二硫化物减少.
- 使用逆相HPLC测量氧化降解的量化.
- 金属合剂的选:EDTA,EGTA,DTPA,NTA,和HEDTA. 这些选方法包括:
主要成果:
- 在分析过程中样品的氧化损害了方法的性能,增加了可变性并限制了吞吐量.
- 六批单克隆抗体在48小时内显示亚单元氧化增加了5-50%.
- 在所有测试批次中,EGTA表现出对亚单元氧化最显著的稳定作用.
结论:
- 优化样品准备对于增加吞吐量和减少氧化分析变异性至关重要.
- EGTA是EDTA的更有效的替代品,可以在分析过程中最大限度地减少抗体亚单元的氧化.
- EGTA提供了一种可行的解决方案,以提高抗体氧化控制策略的可靠性.
更多相关视频
相关概念视频
Masking and Demasking Agents
2.2K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
2.2K
EDTA: Auxiliary Complexing Reagents
518
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
518


