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肝素硫酸盐模仿型甘油聚合物以长度和硫化模式依赖的方式与SARS-CoV-2尖端蛋白结合
Hawau Abdulsalam1, Jiayi Li1, Ravi S Loka1
1Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States.
ACS medicinal chemistry letters
|October 18, 2023
概括
模仿肝硫酸盐的甘油聚合物有效地结合SARS-CoV-2尖端蛋白域. 这些定义的合成聚合物显示出治疗潜力,与天然肝素相比,目标外相互作用较少.
科学领域:
- 生物化学 生物化学
- 聚合物化学 聚合物化学
- 病毒学 病毒学
背景情况:
- SARS-CoV-2 尖端蛋白利用宿主细胞受体进入.
- 肝硫酸盐 (HS) 在病毒结合和进入中发挥作用.
- 由于其异质性,天然氨酸作为治疗剂具有局限性.
研究的目的:
- 开发和描述模仿硫酸乙的基聚合物.
- 研究这些甘油聚合物与SARS-CoV-2尖端蛋白的结合亲和力和结合机制.
- 评估它们作为治疗SARS-CoV-2感染的治疗剂的潜力.
主要方法:
- 精确定义的甘油聚合物的合成,模仿肝硫酸重复单元 (葡萄糖胺-葡萄糖酸).
- 使用IC50和KD等技术进行亲和度测量,以确定与SARS-CoV-2尖端蛋白 (S1,RBD,S2结) 的结合.
- 对ACE2结合和氨酸裂解部位相互作用的干扰的评估.
主要成果:
- 一种特定的甘油聚合物 (12个重复的GlcNS6S-GlcA单位) 对S1蛋白具有很高的亲和力 (IC50 = 13 ± 1.1 nM).
- 这种甘油聚合物没有抑制ACE2结合,而是强烈地与S1/S2结合,而不会阻断furin裂变.
- 与天然肝素不同,合成甘油聚合物具有定义的长度和硫化,从而减少了目标蛋白外相互作用.
结论:
- 模仿肝硫酸盐的甘油聚合物可以有效地以受控的方式结合SARS-CoV-2尖端蛋白成分.
- 这些定义的合成聚合物比天然肝素具有优势,包括特异性和减少目标外影响.
- 聚合肝素硫酸模仿剂代表了开发针对SARS-CoV-2的新型抗病毒疗法的有希望的战略.
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