五个和六个成员的结构锁定2',4'-碳循环的 ribo-thymidines:合成,结构和生物化学研究
Puneet Srivastava1, Jharna Barman, Wimal Pathmasiri
1Department of Bioorganic Chemistry, Biomedical Center, Uppsala University, Uppsala, Sweden.
Journal of the American Chemical Society
|June 8, 2007
概括
锁定核酸 (LNA) 和エNA的新碳循环类似物增强了反感性寡核酸的稳定性和治疗潜力. 这些改性寡核酸显示出改善的核酶耐药性和药物动力学特性,用于潜在的药物开发.
科学领域:
- 药用化学 医学化学
- 核酸化学的核酸化学
- 氧核酸治疗药物 治疗药物
背景情况:
- 反感性寡核酸 (AONs) 是有前途的治疗药物,但往往有不良的稳定性和药理动力学.
- 锁定核酸 (LNA) 和エNA修改增强了AON特性,但进一步的改进是可取的.
研究的目的:
- 合成LNA (碳循环-LNA-T) 和エNA (碳循环-ENA-T) 的新型碳循环类似物.
- 评估这些修改对反感性寡核酸 (AON) 特性的影响.
主要方法:
- 使用激进循环反应合成碳环-LNA-T和碳环-ENA-T.
- 将修改后的核化物纳入AONs.
- 使用NMR光谱学进行结构确认 (HMBC,TOCSY,COSY,NOE).
- 评估双重稳定性 (Tm),RNase H分裂率,以及血清中的核酶稳定性.
主要成果:
- 碳循环-LNA-T和碳循环-ENA-T在高产量的合成.
- 与原生AON相比,修改后的AON显示了增强的双重融温度 (Tm).
- 单次加入碳循环-LNA或碳循环-ENA显著增加了血清中核酶稳定性 (>48小时).
- RNase H裂变率与原生和其他修饰的AONs相比.
结论:
- 碳循环-LNA和碳循环-ENA修饰为AONs提供了显著的核酶抵抗性和稳定性.
- 这些修改提供了改善的药理动力学特性,可能降低所需剂量.
- 碳循环-LNA-T和碳循环-ENA-T由于其稳定性和有效性,是反感性治疗剂的有希望的候选者.
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