三价性siRNA-Conjugates与瓜诺辛作为ASGPR-Binder在体内显示出强大的 Knock-Down
Armin Hofmeister1, Kerstin Jahn-Hofmann1, Bodo Brunner1
1Sanofi R&D, Industrial Park Hoechst, 65926 Frankfurt am Main, Germany.
Journal of medicinal chemistry
|March 7, 2025
概括
研究人员探索了新的化学化合物,以改善向肝脏的治疗方法. 他们开发了基于guanosine的结合物,其效果与现有的基于GalNAc的治疗方法相似,用于逆转氨酸的敲击,扩大了RNA干扰治疗的选择.
科学领域:
- 肝病学和RNA治疗学
- 药物化学和药物发现
背景情况:
- 亚亚糖蛋白受体 (ASGPR) 是肝脏导向药物输送的关键标.
- N-乙银胺 (GalNAc) 是一个成熟的ASGPR连接体,可针对性地提供RNA干扰 (RNAi) 疗法.
- 扩大ASGPR配体的化学多样性对于优化药物输送和治疗疗效至关重要.
研究的目的:
- 为了识别超出GalNAc.的ASGPR结合的新化学实体.
- 开发和评估基于guanosine的结合物作为小干扰RNA (siRNA) 的潜在肝脏向部分.
- 为了比较新型瓜诺辛-siRNA结合物的有效性与已建立的GalNAc-siRNA结合物在向transthyretin (TTR) 的有效性.
主要方法:
- 大约55万种化合物的高通量选,以识别ASGPR结合分子.
- 晶体结构分析,以阐明一种类似瓜诺的热化合物的结合模式与ASGPR.
- 构成morpholino-guanosine积木的化学合成及其对TTR向siRNA的结合.
- 在体外和体内对开发的siRNA结合物的TTR淘汰疗效的评估.
主要成果:
- 一种瓜诺辛核糖类相应物被确定为一个有前途的ASGPR结合化合物.
- 晶体结构揭示了由核糖cis-diol和精氨酸环与ASGPR的pi-pi相互作用引起的Ca2+协调.
- 合成了新的三价值siRNA-guanosine合物,并证明了强大的TTR敲击.
- 基于瓜诺辛的结合物在体外和体内表现出与GalNAc结合的siRNA相比的有效性.
结论:
- 瓜诺辛衍生物可以有效地准ASGPR,为GalNAc配体提供了替代品.
- 开发的关诺辛-siRNA结合物代表了一种有前途的新类肝脏向的RNAi疗法.
- 这项研究扩大了ASGPR向配体的化学空间,并为TTR基因沉默提供了新的工具.
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