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The discovery of potential phosphopantetheinyl transferase Ppt2 inhibitors against drug-resistant Candida albicans
Brazilian Journal of Microbiology ( IF 2.1 ) Pub Date : 2020-06-18 , DOI: 10.1007/s42770-020-00318-w
Ling-Ning Meng 1, 2 , Jin-Yan Liu 2 , Yu-Ting Wang 1, 2 , Shuai-Shuai Ni 3 , Ming-Jie Xiang 1, 2
Affiliation  

With the high-frequency use or abuse of antifungal drugs, the crisis of drug-resistant fungi continues to increase worldwide; in particular, the infection of drug-resistant Candida albicans brings the great challenge to the clinical treatment. Therefore, to decelerate the spread of this resistance, it is extremely urgent to facilitate the new antifungal targets with novel drugs. Phosphopantetheinyl transferases PPTases (Ppt2 in Candida albicans) had been identified in bacterium and fungi and mammals, effects as a vital enzyme in the metabolism of organisms in C. albicans. Ppt2 transfers the phosphopantetheinyl group of coenzyme A to the acyl carrier protein Acp1 in mitochondria for the synthesis of lipoic acid that is essential for fungal respiration, so making Ppt2 an ideal target for antifungal drugs. In this study, 110 FDA-approved drugs were utilized to investigate the Ppt2 inhibition against drug-resistant Candida albicans by the improved fluorescence polarization experiments, which have enough druggability and structural variety under the novel strategy of drug repurposing. Thereinto, eight agents revealed the favourable Ppt2 inhibitory activities. Further, broth microdilution assay of incubating C. albicans with these eight drugs showed that pterostilbene, procyanidine, dichlorophen and tea polyphenol had the superior MIC values. In summary, these findings provide more valuable insight into the treatment of drug-resistant C. albicans.

中文翻译:

发现针对耐药性白色念珠菌的潜在磷酸泛酰巯基乙胺转移酶 Ppt2 抑制剂

随着抗真菌药物的高频使用或滥用,全球耐药真菌危机不断加剧;尤其是耐药性白色念珠菌的感染给临床治疗带来了巨大的挑战。因此,为了减缓这种耐药性的传播,用新药促进新的抗真菌靶点是非常紧迫的。磷酸酯基转移酶 PPTases(白色念珠菌中的 Ppt2)已在细菌、真菌和哺乳动物中得到鉴定,在白色念珠菌中作为生物体代谢的重要酶发挥作用。Ppt2 将辅酶 A 的磷酸泛酰巯基乙胺基团转移到线粒体中的酰基载体蛋白 Acp1,以合成真菌呼吸所必需的硫辛酸,因此使 Ppt2 成为抗真菌药物的理想靶点。在这项研究中,通过改进的荧光偏振实验,利用 FDA 批准的 110 种药物研究了 Ppt2 对耐药性白色念珠菌的抑制作用,在药物再利用的新策略下具有足够的成药性和结构多样性。其中,八种药物显示出有利的 Ppt2 抑制活性。此外,用这八种药物孵育白色念珠菌的肉汤微量稀释试验表明,紫檀芪、原花青素、双氯酚和茶多酚具有优异的 MIC 值。总之,这些发现为耐药性白色念珠菌的治疗提供了更有价值的见解。在新的药物再利用策略下具有足够的成药性和结构多样性。其中,八种药物显示出有利的 Ppt2 抑制活性。此外,用这八种药物孵育白色念珠菌的肉汤微量稀释试验表明,紫檀芪、原花青素、双氯酚和茶多酚具有优异的 MIC 值。总之,这些发现为耐药性白色念珠菌的治疗提供了更有价值的见解。在新的药物再利用策略下具有足够的成药性和结构多样性。其中,八种药物显示出有利的 Ppt2 抑制活性。此外,用这八种药物孵育白色念珠菌的肉汤微量稀释试验表明,紫檀芪、原花青素、双氯酚和茶多酚具有优异的 MIC 值。总之,这些发现为耐药性白色念珠菌的治疗提供了更有价值的见解。
更新日期:2020-06-18
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