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DNAzyme-dependent Analysis of rRNA 2’-O-Methylation
Published on: September 16, 2019
一个外环甲基作为LNA中的2'-氧原子的生物基
Punit P Seth1, Charles R Allerson, Andres Berdeja
1Department of Medicinal Chemistry, Isis Pharmaceuticals, Inc., 1891 Rutherford Road, Carlsbad, California 92008, USA. pseth@isisph.com
Journal of the American Chemical Society
|October 5, 2010
概括
研究人员开发了甲-碳循环锁定核酸 (cLNA) 类似物,模仿锁定核酸 (LNA) 的结合亲和力和活性. 这些新型cLNA的性能与LNA相似,但在动物研究中毒性降低.
科学领域:
- 药用化学 医学化学
- 氧核酸治疗药物 治疗药物
- 结构生物学 结构生物学
背景情况:
- 锁定核酸 (LNA) 对于增强寡核酸稳定性和结合亲和力至关重要.
- 碳循环LNA (cLNA) 类似物被探索为LNA的替代品.
- 修改旨在改善治疗性质并降低毒性.
研究的目的:
- 为了合成和表征甲-cLNA类似物.
- 与LNA相比,评估它们的结合亲和力,热稳定性和生物活性.
- 调查它们的特性和体内性能的结构基础.
主要方法:
- 通过激素启动的分子内循环化合成甲基-cLNA核酸.
- 氧核酸合成和热稳定性和不匹配歧视的表征.
- 用cLNA修饰的DNA复合体的X射线晶体学.
- 在动物模型中对反感性寡核酸 (ASO) 活性和毒性的体内评估.
主要成果:
- 甲-cLNA寡核酸体表现出类似LNA的结合亲和力和热稳定性.
- 晶体结构揭示了一个稳定CH...O键,其中涉及甲基组.
- 甲-cLNA ASO在体内表现出与LNA ASO相似的活性,但毒性降低.
- 结构相关的甲基-cLNA类似物显示混合化特性减弱.
结论:
- 将LNA中的2'-氧替换成一个外环甲基基组,可以获得具有LNA类属性的类似物.
- 甲基基的相互作用解释了增强的热稳定性.
- 甲-cLNA是开发改进的基于核酸的治疗和诊断的有希望的生物.
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