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致病性真菌中的唑类耐药机制

Azole resistance mechanisms in pathogenic .

作者信息

Leong Cheryl, Kit Joel Chan Wai, Lee Shi Mun, Lam Yuen In, Goh Joleen P Z, Ianiri Giuseppe, Dawson Thomas L

机构信息

Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.

Department of Agricultural, Environmental and Food Sciences, University of Molise, 86100, Campobasso, Italy.

出版信息

Antimicrob Agents Chemother. 2021 May 1;65(5). doi: 10.1128/AAC.01975-20. Epub 2021 Feb 22.

Abstract

are emerging fungal pathogens causing opportunistic skin and severe systemic infection. Nosocomial outbreaks are associated with azole resistance and understanding of the underlying mechanisms are limited to knowledge from other fungal species. Herein, we identified distinct antifungal susceptibility patterns in 26 isolates derived from healthy and diseased individuals. A Y67F mutation was identified in five isolates of However, this mutation alone was insufficient to induce reduce azole susceptibility in the wild type strain. RNA-seq and differential gene analysis of healthy and disease derived strains exposed to clotrimazole identified several key metabolic pathways and transporter proteins which are involved in reduce azole susceptibility. The pleiotropic drug transporter was the single most highly upregulated transporter gene in multiple strains of after azole treatment and increased expression of is associated with reduced azole susceptibility in some systemic disease isolates of Deletion of in a pathogenic strain with reduced susceptibility reduced MIC values to the level of that in susceptible isolates. The current dearth of antifungal technologies, globally emerging multi-azole resistance, and broad agriculture and consumer care use of azoles means improved understanding of the mechanisms underlying intrinsic and acquired azole resistance in is crucial for development of antibiotic stewardship and antifungal treatment strategies.

摘要

正成为引起机会性皮肤感染和严重全身感染的新兴真菌病原体。医院内爆发与唑类耐药性有关,而对其潜在机制的了解仅限于来自其他真菌物种的知识。在此,我们在从健康和患病个体分离出的26株菌株中确定了不同的抗真菌药敏模式。在五株菌株中鉴定出一个Y67F突变。然而,仅这一突变不足以诱导野生型菌株的唑类药敏性降低。对暴露于克霉唑的健康和患病来源菌株进行RNA测序和差异基因分析,确定了几个参与降低唑类药敏性的关键代谢途径和转运蛋白。多药耐药转运蛋白是唑类处理后多株菌株中上调程度最高的单一转运蛋白基因,在一些系统性疾病分离株中,其表达增加与唑类药敏性降低有关。在一株药敏性降低的致病菌株中缺失该基因可使最低抑菌浓度值降至敏感菌株的水平。目前全球抗真菌技术匮乏、多唑类耐药性不断出现以及唑类在农业和消费品护理中的广泛使用,意味着深入了解白色念珠菌固有和获得性唑类耐药性的潜在机制对于制定抗生素管理和抗真菌治疗策略至关重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/8092866/dfbbb93acd9e/AAC.01975-20-f001.jpg

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