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Zinc(II) complexes with aromatic nitrogen-containing heterocycles as antifungal agents: Synergistic activity with clinically used drug nystatin.
Journal of Inorganic Biochemistry ( IF 3.8 ) Pub Date : 2020-05-06 , DOI: 10.1016/j.jinorgbio.2020.111089
Tina P Andrejević 1 , Beata Warżajtis 2 , Biljana Đ Glišić 1 , Sandra Vojnovic 3 , Marija Mojicevic 3 , Nevena Lj Stevanović 1 , Jasmina Nikodinovic-Runic 3 , Urszula Rychlewska 2 , Miloš I Djuran 4
Affiliation  

Three novel Zn(II) complexes, [ZnCl2(qz)2] (1), [ZnCl2(1,5-naph)]n (2) and [ZnCl2(4,7-phen)2] (3), where qz is quinazoline, 1,5-naph is 1,5-naphthyridine and 4,7-phen is 4,7-phenanthroline, were synthesized by the reactions of ZnCl2 and the corresponding N-heterocyclic ligand in 1:2 molar ratio in ethanol at ambient temperature. The characterization of these complexes was done by NMR, IR and UV-Vis spectroscopy, and their crystal structures were determined by single-crystal X-ray diffraction analysis. Complexes 1 and 3 are mononuclear species, in which Zn(II) ion is tetrahedrally coordinated by two nitrogen atoms belonging to two qz or 4,7-phen ligands, respectively, and by two chloride anions, while complex 2 is a 1D coordination polymer that contains 1,5-naph as bridging ligand between two metal ions. In agar disc-diffusion assay, complexes 1-3 manifested good inhibitory activity against two investigated Candida strains (C. albicans and C. parapsilosis), while not inducing toxic effects on the healthy human fibroblast cell line (MRC-5). This activity was not fungicidal, as revealed by the broth microdilution assay, however complex 3 showed the ability to modulate Candida hyphae formation, which is an important process during infection and showed significant synergistic effect with clinically used antifungal polyene nystatin.

中文翻译:

与芳香族含氮杂环作为抗真菌剂的锌(II)配合物:与临床使用的制霉菌素的协同活性。

三种新颖的Zn(II)配合物[ZnCl2(qz)2](1),[ZnCl2(1,5-naph)] n(2)和[ZnCl2(4,7-phen)2](3),其中qz是喹唑啉,1,5-naph是1,5-萘吡啶,4,7-phen是4,7-菲咯啉,是通过ZnCl2与相应的N-杂环配体在乙醇中以1:2摩尔比反应合成的在环境温度下。通过NMR,IR和UV-Vis光谱对这些配合物进行表征,并通过单晶X射线衍射分析确定其晶体结构。配合物1和3是单核物种,其中Zn(II)离子分别由属于两个qz或4,7-phen配体的两个氮原子和两个氯离子四面体配位,而配合物2是一维配位聚合物包含1,5-萘作为两个金属离子之间的桥联配体 在琼脂圆盘扩散测定中,配合物1-3显示出对两种研究的念珠菌菌株(白色念珠菌和副念珠菌)具有良好的抑制活性,而对健康的人成纤维细胞系(MRC-5)没有诱导毒性作用。如肉汤微稀释测定所揭示的那样,该活性不是杀真菌的,但是复合物3具有调节念珠菌菌丝形成的能力,这是感染过程中的重要过程,并且与临床使用的抗真菌多烯制霉菌素具有明显的协同作用。
更新日期:2020-05-06
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