用于监测siRNA输送的比度,pH敏感的探头
Madison R Herling1, Ivan J Dmochowski1
1Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.
Journal of the American Chemical Society
|April 19, 2023
概括
研究人员使用修改后的RNA创建了一种新型的pH探针,用于跟踪RNA的内体释放. 这种工具还可以作为基因沉默应用的siRNA模拟器.
科学领域:
- 生物化学
- 分子生物学
- 纳米技术
背景情况:
- 有效的内体逃生对于RNA传递系统至关重要.
- 监测内体内的pH值变化对于优化输送策略至关重要.
研究的目的:
- 开发一种新的比值pH探针,用于监测细胞内核酸的吸收和释放.
- 为了证明探测器作为基因沉默的siRNA模拟器的实用性.
主要方法:
- 使用pH不变的5'-FAM和3'-Cy5染料开发基于2'-OMeRNA的比值pH探针.
- 使用近位瓜宁来增强pH敏感度.
- 用DNA和siRNA模拟HeLa和HEK293T细胞对探针进行双重测试.
主要成果:
- 探测器在pH值4.5到8.0之间显示了48.9倍的光增强.
- 成功监测HeLa细胞中的内体捕获和释放.
- 在HEK293T细胞中与反意义RNA补充物复合时,证明了蛋白质敲击.
结论:
- 开发的基于RNA的pH探针对监测寡核酸输送和内体pH有效.
- 探针是一种多功能工具,既可以作为pH传感器,也可以作为siRNA模拟器.
- 这种方法为研究寡核酸局部化和微环境pH提供了一种一般方法.
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