一种新型的小分子PCSK9抑制剂E28362可以改善高脂血症和动脉样硬化
Wei-Zhi Wang1, Chao Liu2, Jin-Que Luo1,3
1State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, NHC Key Laboratory of Biotechnology for Microbial Drugs, National Center for New Microbial Drug Screening, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Beijing, 100050, China.
一个新的小分子,E28362,通过阻止其与LDLR (低密度脂蛋白受体) 的相互作用来抑制PCSK9 (proprotein convertase subtilisin/kexin type 9). 这导致LDLR水平升高,LDL-C降低,以及动物模型中的超脂血症和动脉样硬化改善.
科学领域:
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
- 心血管研究研究心血管研究
背景情况:
- 蛋白转化酶亚素/素9型 (PCSK9) 通过促进LDL受体 (LDLR) 的溶酶体降解来提高血LDL-C.
- 抑制PCSK9是管理高胆固醇血症和动脉样硬化的关键策略.
- 准PCSK9为胆固醇管理提供了一种新的治疗方法.
研究的目的:
- 确定和描述一种新的小分子PCSK9抑制剂.
- 在超脂血症和动脉样硬化的临床前模型中评估已识别的抑制剂E28362的疗效.
- 阐明E28362在调节LDLR和PCSK9水平中的作用机制.
主要方法:
- 虚拟选4万种化合物以识别PCSK9抑制剂.
- 使用HepG2,AML12和HEK293a细胞进行体外研究,以评估LDLR水平,LDL吸收和细胞毒性.
- 在黄金仓鼠,ApoE-/-小鼠和PCSK9 D374Y过度表达小鼠体内研究,以评估对脂质谱和动脉样硬化病变的影响.
主要成果:
- E28362剂量依赖增加了LDLR蛋白水平,并增强了细胞系中的LDL吸收,没有观察到毒性.
- E28362显著降低了血总胆固醇,甘油三,LDL-C和PCSK9水平在高脂血症仓鼠.
- 在ApoE-/-和PCSK9 D374Y小鼠中,E28362降低了血LDL-C和动脉样性损伤区域,同时增加了肝脏LDLR表达.
- 发现E28362可以选择性地结合PCSK9,阻断LDLR相互作用,并通过无素-蛋白酶体通路促进PCSK9的降解.
结论:
- 在多种动物模型中,E28362有效抑制PCSK9,增加LDLR水平,并改善多脂血症和动脉样硬化.
- E28362通过阻断PCSK9-LDLR相互作用并诱导PCSK9降解而起作用.
- E28362代表了一个有前途的小分子治疗候选人,用于高胆固醇血和动脉样硬化.
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