碳化合物受约束的核酸调节RNA的混合动力学
Tamilselvan Rajasekaran1, Graeme C Freestone2, Rodrigo Galindo-Murillo3
1Department of Chemistry, Université de Montréal, Quebec H3C 3J7, Canada.
Journal of the American Chemical Society
|January 18, 2022
概括
通过碳化合物桥梁调节的混合动力来限制寡核酸 (ON) 骨干的灵活性. 宏循环ON显示出更快的解离,降低稳定性,而锁定核酸 (LNA) ON则改善双重稳定性.
科学领域:
- 医学化学
- 核酸治疗药物
- 分子生物物理学
背景情况:
- 治疗性寡核酸 (ON) 的结合亲和度取决于结合率 (ka) 和解离率 (kd).
- 单链ON具有灵活性,可能阻碍与基RNA的杂交.
- 调节 ON 脊柱形状对于优化杂交动力学至关重要.
研究的目的:
- 调查是否限制ONs的糖-脊柱周围的旋转可以调节它们对补充RNA的杂交动力学.
- 采用分子动态模拟来优化碳化合物桥梁设计,以限制骨干的ON类型.
- 综合和评估经过修改的ONs与骨干约束,以改善杂交特性.
主要方法:
- 利用分子动态模拟来指导碳化合物桥梁的设计,以限制骨干.
- 通过环闭转化合成骨干受约束的核酸剪切剂并将其纳入寡核酸中.
- 通过现场合成并将其合到固体支物以组装寡核酸.
主要成果:
- 与DNAON相比,15个成员的宏循环受约束的ON类型表现出类似的/改进的启动率,但显著增加的关闭率,降低了双重稳定性.
- 锁定核酸 (LNA) ONs表现出与DNA ONs相似的启动率,但非常缓慢的关闭率,增强双重稳定性.
- 实验数据通常支持受约束的骨干ON类型的分子动力学模拟预测.
结论:
- 脊柱约束策略可以调节寡核酸杂交动力学.
- 分子动力学模拟作为设计下一代受约束的骨干ON类型的预测工具.
- 优化的骨干约束,如LNA,可以提高双重稳定性和治疗潜力.
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