Novel xanthone antibacterials: Semi-synthesis, biological evaluation, and the action mechanisms

文献类型： 外文期刊

第一作者： Lu, Yan

作者： Lu, Yan;Zhou, Cui;Wang, Meizhu;Wang, Xiaoyang;Zhang, Keyu;Han, Xiangan;Tang, Qun;Wang, Chunmei;Zhou, Wen;Lu, Yan;Wang, Shaobing;Guan, Ting;Lin, Jinchao;Wang, Xiaoyang;Zhang, Keyu;Tang, Qun;Wang, Chunmei;Zhou, Wen

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关键词： alpha-Mangostin derivatives; Synthesis; Staphylococcus aureus; Structure activity relationships; Antibacterial mechanism

期刊名称：BIOORGANIC & MEDICINAL CHEMISTRY （ 影响因子：3.5； 五年影响因子：3.3 ）

ISSN： 0968-0896

年卷期： 2023 年 83 卷

页码：

收录情况： SCI

摘要： alpha-Mangostin (alpha-MG) has demonstrated to display potent activities against Gram-positive bacterial. However, the contribution of phenolic hydroxyl groups of alpha-MG to the antibacterial activity remains obscure, severely hampering selection of structure modification to develop more potential alpha-MG-based anti-bacterial derivatives. Herein, twenty-one alpha-MG derivatives are designed, synthesized and evaluated for the antibacterial activities. The structure activity relationships (SARs) reveal that the contribution of the phenolic groups ranks as C3 > C6 > C1, and the phenolic hydroxyl group at C3 is essential to the antibacterial activity. Of note, compared to the parent compound alpha-MG, 10a with one acetyl at C1 exhibits the higher safety profiles due to its higher selectivity and no hemolysis, and the more potent antibacterial efficacy in an animal skin abscess model. Our evidences further present that, in comparison with alpha-MG, 10a has a stronger ability in depolarizing membrane potentials and leads to more leakage of bacterial proteins, consistent with the results observed by transmission electron microscopy (TEM). Transcriptomics analysis demonstrates those observations possibly relate to disturbed synthesis of proteins participating in the biological process of membrane permeability and integrity. Collectively, our findings provide a valuable insight for developing alpha-MG-based antibacterial agents with little hemolysis and new action mechanism via structural modifications at C1.

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