The Essential Thioredoxin Reductase of the Human Pathogenic Mold Aspergillus fumigatus Is a Promising Antifungal Target

Language
en
Document Type
Article
Issue Date
2020-06-26
First published
2020-06-25
Issue Year
2020
Authors
Binder, Jasmin
Shadkchan, Yana
Osherov, Nir
Krappmann, Sven
Editor
Publisher
Frontiers Media S.A.
Abstract

The identification of cellular targets for antifungal compounds is a cornerstone for the development of novel antimycotics, for which a significant need exists due to increasing numbers of susceptible patients, emerging pathogens, and evolving resistance. For the human pathogenic mold Aspergillus fumigatus, the causative agent of the opportunistic disease aspergillosis, only a limited number of established targets and corresponding drugs are available. Among several targets that were postulated from a variety of experimental approaches, the conserved thioredoxin reductase (TrxR) activity encoded by the trxR gene was assessed in this study. Its essentiality could be confirmed following a conditional TetOFF promoter replacement strategy. Relevance of the trxR gene product for oxidative stress resistance was revealed and, most importantly, its requirement for full virulence of A. fumigatus in two different models of infection resembling invasive aspergillosis. Our findings complement the idea of targeting the reductase component of the fungal thioredoxin system for antifungal therapy.

Journal Title
Frontiers in Microbiology
Volume
11
Citation
Frontiers in Microbiology 11 (2020). <https://www.frontiersin.org/articles/10.3389/fmicb.2020.01383/full>
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