实时监测RNA的高阶结构的温度-课程大小排除染色学和微流体调制光谱学.
Bingchuan Wei1, Eugene Ma2, Shijia Tang1
1Synthetic Molecule Pharmaceutical Science, Genentech Inc., 1 DNA Way, South San Francisco, California 94080, United States.
Analytical chemistry
|February 27, 2025
概括
对RNA疗法的高阶结构 (HOS) 的描述至关重要. 尺寸排除色谱 (SEC) 和微流体调制光谱 (MMS) 有效地分析RNA聚合和构造变化.
科学领域:
- 生物物理特性表征
- 开发RNA疗法 开发RNA疗法
- 分析化学是一种分析化学.
背景情况:
- 由于功能影响,对寡核酸治疗药物的高阶结构 (HOS) 兴趣日益增加.
- 目前用于特征大型核糖核酸 (RNA) 的现有方法面临吞吐量,成本和分辨率的限制.
研究的目的:
- 使用直角分析方法研究单指导RNAs (sgRNAs) 的构造变化和聚合.
- 开发和应用尺寸排除色谱 (SEC) 和微流体调制光谱 (MMS) 用于RNA HOS分析.
主要方法:
- 使用SEC与多角度光散射 (MALS) 和质谱 (MS) 相结合.
- 采用异热和温度过程SEC,以及热升级微流体调制光谱 (MMS).
- 实时监测HOS从室温到RNA点的变化.
主要成果:
- 在100多个sgRNA中确定了各种形式的聚合和潜在的相互作用.
- 观察到热诱导解离的两个离散步骤:高阶聚合物 (HOA) 和二元解离.
- 相关的特定红外光谱区域 (1665厘米-1,1700-1720厘米-1) 与沃森-克里克基配对和HOS变化.
结论:
- SEC和MMS的结合提供了一个全面的工具包,用于在本地条件下对RNA HOS进行表征.
- 这种方法为优化RNA治疗候选物和选配方提供了宝贵的见解.
- 证明了SEC和MMS用于分析大型RNA中复杂的HOS和聚合配置文件的实用性.
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