靠近紫外线和可见光诱导的IgG1基模式的特定部位碎片化,由histidine和Fe(III介导):对于域内相互作用的作用?
Maribel Espinoza Ballesteros1, Thomas Tolbert1, Christian Schöneich1
1Department of Pharmaceutical Chemistry, University of Kansas, 2093 Constant Avenue, Lawrence, KS 66047, USA.
Journal of pharmaceutical sciences
|May 5, 2025
概括
蛋白质的光稳定性对于治疗开发至关重要. 基于IgG1的模式的差异,如HM-Fc,NISTmAb和Flt-3L-Ig,影响光诱导的碎片化,受糖化和域相互作用等因素的影响.
科学领域:
- 生物化学 生物化学
- 蛋白质工程是指蛋白质工程.
- 制药发展 制药发展
背景情况:
- 蛋白质光稳定性是治疗性蛋白质的关键质量属性.
- 接触近紫外线或可见光可以诱导蛋白质碎片化,影响药物的有效性和安全性.
研究的目的:
- 为了比较三种不同的基于IgG1的模式的光稳定性:高曼诺斯Fc片段 (HM-Fc),NISTmAb和融合蛋白 (Flt-3L-Ig).
- 为了研究histidine缓冲剂配方与不同的Fe (III) 水平对蛋白质光降解的影响.
- 阐明有助于差异光稳定性的结构和分子因素.
主要方法:
- 基于IgG1的三种模式在histidine缓冲剂中配制,其度可变.
- 配方蛋白质暴露在近紫外线或可见光下以评估光降解.
- 酶去糖化和Fab域裂变,以评估它们对光稳定性的影响.
- 对特定位点的光碎片的分析,特别是在CH2域中的Thr259.
主要成果:
- 在HM-Fc,NISTmAb和Flt-3L-Ig之间观察到光降解的显著差异.
- 与HM-Fc相比,NISTmAb和Flt-3L-Ig在CH2域中对Thr259光碎片化表现出更大的敏感性.
- 酶去糖化增加了NISTmAb和HM-Fc.中的光碎裂易感性.
- 来自NISTmAb的Fab域的酶分裂减少了光碎片化.
结论:
- 光稳定性的差异受到域-域相互作用,甘氨酸结构和热稳定性的影响.
- 治疗性蛋白质的开发需要在配方和产品设计过程中仔细考虑光稳定性.
- 了解光降解机制对于确保生物药物的质量和有效性至关重要.
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