修改C5-Propynyl的2'-甲核酸与RNA形成稳定的重复体,这些RNA具有RNase H能力
Alexander Pontarelli1, Christopher J Wilds1
1Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke St. W., Montréal, Québec H4B 1R6, Canada. Chris.Wilds@concordia.ca.
Organic & biomolecular chemistry
|September 5, 2023
概括
新的C5-propynyl-2'-fluoroarabinonucleic acid (FANAP) 增强了RNA结合和RNase H裂变,用于反感性疗法. 这些修改表明,开发有效的抗遗传性疾病的寡核酸药物具有前途.
科学领域:
- 药用化学 医学化学
- 氧核酸治疗药物 治疗药物
- 分子生物学分子生物学
背景情况:
- 对寡核酸 (ONs) 的化学修饰对于成功的反意义疗法至关重要,改善RNA亲和力,稳定性和传递.
- 然而,许多当前的修改并不能有效触发RNase H,RNase H是反感应作用的关键酶,限制了它们的治疗潜力.
研究的目的:
- 合成和评估新型核酸相似物,特别是C5-propynyl-2-fluoroarabinonucleic acid (FANAP),以提高反感性质.
- 评估FANAP结合对RNA/DNA结合亲和力,核酶稳定性和RNase H.活性的影响.
主要方法:
- 合成FANAP类似物,包括尿素 (FaraUP) 和细胞素 (FaraCP) 插入物.
- 将这些类似物纳入寡核酸中并评估RNA/DNA双重稳定性.
- 使用E.E.评估RNase H裂变活性 大肠杆菌RNase H和核酶S1的消化.
主要成果:
- FANAP修改显著稳定了RNA复杂体,同时对DNA结合的影响最小.
- 支持改性寡核酸E.E. 大肠杆菌RNase H裂变,尽管与对照组相比,其模式发生了变化.
- 一个带有FANAP核心的2 -O-甲乙烯 (2 -O-MOE) 间隙器显示,与C5-propynyl-arabinonucleic acid (ANAP) 相比,RNA裂变率增加.
- 与FANAP相比,酶性水解显示了ANAP的稳定性更强.
结论:
- 修改C5-propynyl ANA/FANA为设计下一代治疗性寡核酸提供了一个有前途的途径.
- 这些类似物增强了抗意义药物开发的关键特性,包括RNA亲和力和RNase H介导的裂变.
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