Synthesis, Antimicrobial Activities, and Model of Action of Novel Tetralone Derivatives Containing Aminoguanidinium Moiety

文献类型： 外文期刊

第一作者： Zhang, Qing-Jie

作者： Zhang, Qing-Jie;Li, Yu-Xi;Ge, Wen-Bo;Bai, Li-Xia;Xu, Xiao;Yang, Ya-Jun;Liu, Xi-Wang;Li, Jian-Yong

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关键词： aminoguanidine; tetralone; synthesis; antibacterial activity; ESKAPE pathogens; S. aureus; MRSA; structure-activity relationship; dihydrofolate reductase; membrane disruption; in vivo antibacterial efficacy; drug development

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2025 年 26 卷 13 期

页码：

收录情况： SCI

摘要： The objectives of this study were to design, synthesize, and evaluate the antibacterial activity of a series of novel aminoguanidine-tetralone derivatives. Thirty-four new compounds were effectively synthesized through nucleophilic substitution reaction and guanidinylation reaction. Chemical structures of all the desired compounds were identified by NMR and HR-MS spectroscopy. Most of the synthesized compounds showed significant antibacterial activity against ESKAPE pathogens and clinically resistant Staphylococcus aureus (S. aureus) isolates. S. aureus is an important pathogen that has the capacity to cause a variety of diseases, including skin infections, pneumonia, and sepsis. The most active compound, 2D, showed rapid bactericidal activity against S. aureus ATCC 29213 and MRSA-2 with MIC/MBC values of 0.5/4 mu g/mL and 1/4 mu g/mL, respectively. The hemolytic activity and cytotoxicity of 2D was low, with HC50 and IC50(HEK 293-T) values of 50.65 mu g/mL and 13.09 mu g/mL, respectively. Compound 2D induced the depolarization of the bacterial membrane and disrupted bacterial membrane integrity, ultimately leading to death. Molecular docking revealed that dihydrofolate reductase (DHFR) may be a potential target for 2D. In the mouse skin abscess model caused by MRSA-2, 2D reduced the abscess volume, decreased bacterial load, and alleviated tissue pathological damage at doses of 5 and 10 mg/kg. Therefore, compound 2D may be a promising drug candidate for antibacterial purposes against S. aureus.

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