[关键词]
[摘要]
目的 基于网络药理学和分子对接技术,预测黄芪保护急性肝损伤的有效成分及其可能的靶点,并通过 动物实验验证有关结果。方法 通过中药系统药理学数据库与分析平台 (TCMSP) 和文献检索获取黄芪黄酮的有 效活性成分,使用 SwissTargetPredicition 数据库预测其作用靶点;利用人类在线孟德尔遗传数据库 (OMIM) 、 GeneCards 数据库获取肝损伤相关靶点;并通过韦恩图获取两者的交集靶点。借助 STRING 数据库对黄芪黄酮- 肝损伤交集靶点进行蛋白质互作 (PPI) 分析,并通过 Cytoscape 软件进行可视化和拓扑分析,筛选出关键靶点。 通过 AutoDock 软件对关键靶点和黄芪黄酮有效活性化合物进行分子对接,验证主要活性成分与关键靶点的结 合水平,并在此基础上进行实验验证。采用 CCl4 诱导的急性肝损伤小鼠模型,通过血清生化指标、氧化应激 指标、病理组织切片、Western Blot 及 RT-PCR 等方法验证实验结果。结果 共收集到有效药物成分 10 个, 成分相关靶点 423 个和疾病靶点 2 108 个,二者交集靶点共 193 个。PPI 网络发现过氧化物酶体增殖物激活受 体 γ (PPAR-γ) 为关键治疗靶点。分子对接结果表明,黄芪黄酮中 10 个有效活性成分均与 PPAR-γ 具有较好的 结合能力,其中毛蕊异黄酮葡萄糖苷与 PPAR-γ 结合能最强 (-7.6 kcal·mol -1 ) ,可通过氢键和疏水作用有效结 合。动物实验结果证明,毛蕊异黄酮葡萄糖苷可明显降低模型小鼠的肝脏系数、ALT、AST、ALP、TBIL、 DBIL 和 TBA 等肝功能指标表达 (P<0.05,P<0.01,P<0.001) ,改善肝组织病理损伤。并且,毛蕊异黄酮葡 萄糖苷明显促进模型小鼠中氧化应激指标 SOD、GSH-Px、GSH、CAT 的表达,抑制 MDA 的表达 (P<0.05, P<0.01) 。Western Blot 及 RT-PCR 结果显示毛蕊异黄酮葡萄糖苷明显促进模型小鼠肝脏组织中 PPAR-γ、Nrf2 的表达,抑制 NF-кB 的表达 (P<0.001) 。结论 黄芪黄酮活性成分毛蕊异黄酮葡萄糖苷与 PPAR-γ 具有较好 的结合作用,可能通过上调 PPAR-γ、Nrf2 的表达,下调 NF-κB 的表达来实现对氧化应激及炎症反应的调控, 发挥对 CCl4 诱导的急性肝损伤的保护作用。
[Key word]
[Abstract]
Objective To predict the active components and potential targets of Astragali Radix in protecting against acute liver injury using network pharmacology and molecular docking,and to validate the findings through animal experiments. Methods Active flavonoid components of Astragali Radix were retrieved from the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) and literature. SwissTargetPrediction was used to predict their targets,while liver injury-related targets were obtained from the Online Mendelian Inheritance in Man (OMIM) and GeneCards databases. Common targets were identified via Venn diagram analysis. Protein-protein interaction (PPI) networks of Astragali Radix flavonoids-liver injury targets were constructed using STRING and visualized with Cytoscape for topological analysis to identify key targets. Molecular docking was performed using AutoDock to assess binding affinities between core active compounds and key targets. Experimental validation was conducted using a CCl4-induced acute liver injury model,evaluating serum biochemical markers,oxidative stress indicators,histopathology,Western Blot,and RT-PCR. Results Ten bioactive compounds,423 compound-related targets,and 2 108 disease-related targets were identified,with 193 overlapping targets. PPI network analysis revealed peroxisome proliferator-activated receptor γ (PPAR-γ) as the pivotal therapeutic target. Molecular docking demonstrated strong binding between all 10 flavonoids and PPAR- γ,with calycosin-7-O- β -D-glucoside exhibiting the highest affinity (-7.6 kcal·mol -1 ) via hydrogen bonds and hydrophobic interactions. In vivo,calycosin-7-O- β -D-glucoside significantly reduced liver index,ALT,AST,ALP,TBIL,DBIL,and TBA levels (P<0.05,P<0.01,P< 0.001) ,ameliorated histopathological damage,enhanced antioxidant markers (SOD,GSH-Px,GSH,CAT) ,and suppressed MDA (P<0.05) . Western Blot and RT-PCR confirmed upregulation of PPAR- γ and Nrf2 and downregulation of NF-κB (P<0.001) in liver tissues. Conclusion Calycosin-7-O-β-D-glucoside,a key Astragali Radix flavonoid, binds effectively to PPAR- γ, likely exerting hepatoprotection against CCl4-induced injury by modulating oxidative stress and inflammation via PPAR-γ/Nrf2 activation and NF-κB suppression.
[中图分类号]
R285.5
[基金项目]
甘肃省青年人才个人项目 (2024QNGR20)