域在生物相容接口上的抗体吸附架构:通过QCM-D和中子反射计进行光
Kangcheng Shen1, Mingrui Liao1,2, Xuzhi Hu3,4
1Biological Physics Laboratory, Department of Physics and Astronomy, The University of Manchester, Manchester, UK.
治疗性单克隆抗体 (mAbs) 在油接口上表现出pH依赖的结构变化. Fc区域驱动这些构造变化,影响药物输送装置中的抗体稳定性.
科学领域:
- 生物物理学的生物物理.
- 材料科学 材料科学 材料科学
- 制药科学 制药科学
背景情况:
- 治疗性单克隆抗体 (mAbs) 的界面稳定性对于药物开发至关重要.
- 油涂层输送装置对抗体稳定性提出了独特的挑战.
研究的目的:
- 在不同的pH下,研究聚甲基西洛 (PDMS) 接口上的抗体构造动态.
- 了解工程抗体及其碎片的pH依赖性结构适应.
主要方法:
- 使用了中子反射 (NR),光谱圆测量 (SE) 和带散射的石英晶体微平衡 (QCM-D).
- 检查了两种工程抗体 (COE-3,COE-7) 以及它们的Fab和Fc片段.
主要成果:
- 抗体在pH值5.5和8.0之间表现出明显的构造过渡,从单层转向双层架构.
- 在pH 5.5时,抗体形成了压缩的单层,表明变形;在pH 8.0时,出现了双层结构.
- Fc区域主要推动了pH诱导的结构重组,而Fab片段保持了稳定的单层构造.
结论:
- 建立了对抗体-表面相互作用和碎片贡献的定量框架.
- 对抗体吸附的机制理解提高了油涂层输送器件的稳定性.
- 提供了改善抗体制药的见解.
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