Utility of 1,8-diaminonaphthalene in the synthesis of some novel heterocycles as potent anti-MRSA with dual DNA gyrase and topoisomerase IV inhibition
作者:Ebtehal Husseiny、Nagwan El menofy、Samiha El-Sebaey
DOI:10.21608/ejchem.2021.104410.4824
日期:2021.12.6
1,8-Diaminonaphthalene was used as an active binucleophile from which some perimidines and (naphthalene-1,8-diyl)bis(heterocycles) were designed, prepared, and assessed for their antimicrobial activity against Staphylococcus aureus, Escherichia coli, different strains of methicillin-resistant Staphylococcus aureus (MRSA), and multidrug resistant (MDR) clinical isolates of Enterococcus faecium and Enterococcus faecalis. Compounds 1 and 6 exhibited significant antibacterial activity against Staphylococcus aureus with MIC values of 62.5 and 15.63 µg/mL. Additionally, compound 2 showed a remarkable antimicrobial activity against MRSA 1 (MIC = 62.5 µg/mL). Additionally, compound 6 exerted extremely potent antimicrobial effect towards all resistant strains with MIC values range of 31.25-62.5 µg/mL that is much more potent than reference drugs amoxicillin and cephalexin (MIC > 500 µg/mL). Furthermore, compounds 2, 3, and 6 displayed powerful antibiofilm activity against both Staphylococcus aureus and MRSA where compound 2 presented the most potent antibiofilm action among the tested compounds. To investigate the mechanism of action for compounds 2 and 6, inhibition of DNA gyrase together with topoisomerase IV were evaluated. Both compounds presented promising inhibitory action with IC50 at the micromolar range.
以 1,8-二氨基萘为活性双亲核物,设计、制备了一些哌啶和(萘-1,8-二基)双(杂环),并评估了它们对金黄色葡萄球菌的抗菌活性、大肠杆菌、耐甲氧西林金黄色葡萄球菌(MRSA)的不同菌株以及粪肠球菌和粪肠球菌的耐多药(MDR)临床分离株的抗菌活性进行了评估。化合物 1 和 6 对金黄色葡萄球菌具有显著的抗菌活性,其 MIC 值分别为 62.5 和 15.63 µg/mL。此外,化合物 2 对 MRSA 1(MIC = 62.5 µg/mL)具有显著的抗菌活性。此外,化合物 6 对所有耐药菌株都具有极强的抗菌效果,其 MIC 值范围为 31.25-62.5 µg/mL,远高于参考药物阿莫西林和头孢氨苄(MIC > 500 µg/mL)。此外,化合物 2、3 和 6 对金黄色葡萄球菌和 MRSA 都显示出强大的抗生物膜活性,其中化合物 2 的抗生物膜作用在测试化合物中最强。为了研究化合物 2 和 6 的作用机制,对其抑制 DNA 回旋酶和拓扑异构酶 IV 的作用进行了评估。这两种化合物都具有良好的抑制作用,其 IC50 在微摩尔范围内。