Is Bismuth Really the “Green” Metal? Exploring the Antimicrobial Activity and Cytotoxicity of Organobismuth Thiolate Complexes
作者:Liam J. Stephens、Sarmishta Munuganti、Rebekah N. Duffin、Melissa V. Werrett、Philip C. Andrews
DOI:10.1021/acs.inorgchem.9b03550
日期:2020.3.16
ever-increasing threat for human health. Metal complexes and, in particular, those that incorporate bismuth offer an attractive alternative to the typically used organic compounds to which bacteria are often able to develop resistance determinants. Herein we report the synthesis, characterization, and biological evaluation of a series of homo- and heteroleptic bismuth(III) thiolates incorporating either one
抗菌素耐药性正成为对人类健康的越来越大的威胁。金属配合物,尤其是掺有铋的配合物,为细菌通常能够产生抗性决定簇的常用有机化合物提供了一种有吸引力的替代方法。本文中,我们报告了一系列均一和杂配的铋(III)硫醇盐的合成,表征和生物学评估,该硫醇铋结合了一个(BiPh2L),两个(BiPhL2)或三个(BiL3)含硫的唑配体,其中LH =四唑硫醇或三唑硫醇(硫酮)。尽管铋通常被认为是无毒的重金属,但我们证明金属中心周围的环境对含铋配合物的安全性具有明显的影响。尤其是,杂合硫醇盐复合物(BiPh2L和BiPhL2)显示出强大的抗菌活性,但对哺乳动物细胞也具有非选择性的细胞毒性。有趣的是,均溶硫醇盐复合物(BiL3)被证明对细菌和哺乳动物细胞完全无活性。对复合物的进一步生物学分析揭示了对这些特定硫醇铋的生物学作用方式的初步见解。耐甲氧西林金黄色葡萄球菌(MRSA)细胞的扫描电子显微镜图像显示,细胞膜