应用交叉相关性用于蛋白质治疗药物的热稳定性分析
Nicholas Knutson1, Jason Richardson1, Zhongqi Zhang1
1Attribute Sciences, Amgen Inc., Thousand Oaks, CA, USA.
Journal of pharmaceutical and biomedical analysis
|October 10, 2025
概括
一种新的交叉相关法增强了蛋白质热稳定性分析,超出了传统的Tm方法. 这种方法更好地区分压力后单克隆抗体的微妙变化,改善生物制药研究和候选人选择.
科学领域:
- 生物制药学分析分析
- 蛋白质的表征 蛋白质的表征
- 分析化学是一种分析化学.
背景情况:
- 使用差分扫描热度计 (DSC) 和纳米差分扫描度计 (nanoDSF) 的热过渡温度 (Tm) 方法是蛋白质热稳定性评估的标准.
- 在Tm方法中存在局限性,可能会忽视微妙的热谱变化.
- 为了更敏感的蛋白质稳定性表征,需要改进的分析方法.
研究的目的:
- 引入和评估交叉相关性方法作为蛋白质热稳定性分析的增强方法.
- 为了比较交叉相关性方法与传统的TM方法的有效性.
- 评估该方法在应激后检测单克隆抗体 (mAbs) 中微妙的热稳定性差异的能力.
主要方法:
- 使用差分扫描热度计 (DSC) 和纳米差分扫描度计 (nanoDSF) 来生成热稳定性数据.
- 应用了一种新的交叉相关性方法,分析整个温度图形,不同于TM方法的重点是特定的点.
- 分析的单克隆抗体 (mAb) 样本经过强制降解,包括H2O2诱导的压力和紫外线照射.
主要成果:
- 与Tm方法相比,交叉关联方法显示了在压力和无压力mAb样本之间区分的优越能力.
- 用交叉相关性方法更有效地识别了暗示蛋白质降解的热形状的微妙变化.
- 该方法成功地区分了经历H2O2诱导和UV光诱导压力的样本,这些压力会影响托,氨酸和氨酸等氨基酸残留物.
结论:
- 交叉相关性方法为蛋白质热稳定性分析提供了增强的差异化能力.
- 它在生物制药研究中作为传统TM方法的宝贵补充技术.
- 这种增强的方法可以通过提供更敏感的稳定性见解来改善候选药物的选择.
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