基于网络毒理学和分子对接探究双酚A致注意缺陷多动障碍的机制及作用靶点

Network Toxicology and Molecular Docking Strategies for the Analysis of Toxicity and Mechanisms of Bisphenol A in Attention-Deficit/Hyperactivity Disorder

  • 摘要: 双酚A(Bisphenol A, BPA)是一种广泛存在的环境内分泌干扰物,其暴露可干扰人体的神经系统,引起注意缺陷多动障碍(Attention Deficit Hyperactivity Disorder, ADHD)等神经发育障碍性疾病的发生。然而,BPA诱发ADHD的神经毒性作用及分子机制仍缺乏系统性阐述。因此,本研究旨在通过网络毒理学结合分子对接技术探讨BPA引发ADHD的潜在分子靶点和作用机制。首先,借助ChEMBL、STITCH、Swiss Target Prediction等数据库预测BPA的潜在毒理靶点,并通过OMIM以及GeneCards数据库获取ADHD的相关靶点,通过韦恩图分析确定二者的共同潜在靶点;进一步运用STRING数据库构建蛋白相互作用网络,结合Cytoscape软件进行可视化处理,筛选核心靶点;利用DAVID数据库对筛选出的潜在靶点和核心靶点分别进行基因本体(Gene Ontology, GO)分析以及京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes, KEGG)通路富集分析;最后通过CB-Dock2平台进行分子对接评估BPA与关键核心靶点之间的结合亲和力及相互作用模式。结果表明:①经数据库分析,获得BPA暴露相关毒理靶点408个,ADHD相关靶点5 134个,最终确定236个为BPA暴露和ADHD的共同潜在靶点。②通过蛋白相互作用网络分析,筛选出39个核心靶点,其中排名前5位的关键核心靶点为AKT1、HSP90AA1、HSP90AB1、ESR1和MAPK3。③GO和KEGG通路分析显示,BPA暴露介导的ADHD毒理靶点主要集中于神经活性配体-受体相互作用、内分泌抵抗、PI3K-Akt信号通路、MAPK信号通路及FoxO信号通路等生物学过程与信号通路。④分子对接结果表明,5个关键核心靶点与BPA具有良好的结合亲和力和特异性相互作用。研究显示,BPA暴露可能是诱发ADHD的重要环境风险因素,并通过网络毒理学与分子对接技术揭示了其潜在的分子作用机制。研究结果为深入理解BPA的神经毒性效应提供了新的理论依据,也为ADHD的预防与治疗策略开发奠定了基础。

     

    Abstract: Bisphenol A (BPA), a widespread environmental endocrine disruptor, has been implicated in neurodevelopmental disorders, including Attention-Deficit/Hyperactivity Disorder (ADHD), through interfering with the human nervous system. However, the neurotoxic effects of BPA-induced ADHD and the underling mechanisms remain to be fully elucidated. This study employs network toxicology and molecular docking approaches to uncover the potential toxicological targets and molecular mechanisms of BPA-induced ADHD. First, potential toxicological targets of BPA were predicted using ChEMBL, STITCH, and Swiss Target Prediction platforms, while ADHD-related targets were compiled from the OMIM and GeneCards databases. Common potential targets were identified via Venn analysis. Subsequently, protein-protein interaction (PPI) networks were constructed using STRING and visualized in Cytoscape to identify core targets. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses were performed using DAVID. Finally, molecular docking via the CB-Dock2 platform was employed to evaluate the binding interactions between BPA and the identified core targets. The results are summarized as follows: (1) A total of 408 BPA-related toxicological targets and 5134 ADHD-associated targets were identified, and 236 potential targets linked to both BPA exposure and ADHD were confirmed. (2) Thirty-nine core targets were identified via PPI network analysis, among which the top five key core targets are AKT1, HSP90AA1, HSP90AB1, ESR1 and MAPK3. (3) GO and KEGG analyses revealed significant enrichment in biological processes and signal pathways, including neuroactive ligand-receptor interaction, endocrine resistance, PI3K/Akt signaling pathway, MAPK signaling pathway, and FoxO signaling pathway. (4) Molecular docking confirmed strong binding affinities between BPA and five key core targets. This study reveals that BPA exposure may represent a critical environmental risk factor for ADHD and uncovers potential molecular mechanism through network toxicology and molecular docking. These findings provide a mechanistic framework for BPA neurotoxicity and may inform the development of targeted interventions for ADHD prevention.

     

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