青蒿活性成分中GPX4激动剂的虚拟筛选研究

Virtual Screening of GPX4 Agonists in the Active Ingredients of Artemisia Annua

  • 摘要: 谷胱甘肽过氧化物酶4(GPX4)是一种能够特异性催化谷胱甘肽将脂质过氧化物转化为类脂醇的硒蛋白,其表达量上调在抑制细胞铁死亡以及相关炎症反应中发挥着重要的作用。为了在青蒿成分中筛选出激动GPX4的潜在活性小分子,首先在“中药系统药理学数据库与分析平台(TCMSP)”检索得到126个青蒿活性小分子;然后,通过类药性筛选出50个青蒿活性小分子;其次,采用GPX4-配体对接模拟和GPX4-配体互作模式对比筛选出8个青蒿活性小分子;继而通过GPX4-配体结合自由能计算分析筛选,发现artemisinin(ARS)、patuletin、kaempferol与阳性对照物1d4(PKUMDL-LC-101-D03)的作用方式相似;最后,进行分子动力学模拟。结果显示:ARS、patuletin、kaempferol、阳性对照物1d4可与GPX4形成稳定性较强的复合物。

     

    Abstract: Glutathione peroxidase 4(GPX4) is a selenoprotein that can specifically catalyze the conversion of glutathione from lipid peroxides to lipid alcohols. Up-regulation of GPX4 expression plays an important role in inhibiting ferroptosis and related inflammation. In order to screen out the potential active small molecules that can activate glutathione peroxidase 4(GPX4) from Artemisia annua, 126 active small molecules of Artemisia annua were firstly retrieved from the Traditional Chinese Medicine System Pharmacology Database and Analysis Platform and 50 active small molecules of Artemisia annua were screened out according to drug-like properties. Further, 8 active small molecules of Artemisia annua were screened out through GPX4-ligand docking simulation and GPX4-ligand inte-raction pattern. Analysis and screening with GPX4-ligand free binding energy calculation found that artemisinin, patuletin and kaempferol acted similarly to the positive control 1d4(PKUMDL-LC-101-D03). Finally, molecular dynamics simulation was performed. The results showed that artemisinin, patuletin, kaempferol and the positive control 1d4 can form a stable complex with GPX4.

     

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