Trichophyton rubrum Azole Resistance Mediated by a New ABC Transporter, TruMDR3.
Details
Serval ID
serval:BIB_1B54EDC0B86B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Trichophyton rubrum Azole Resistance Mediated by a New ABC Transporter, TruMDR3.
Journal
Antimicrobial agents and chemotherapy
ISSN
1098-6596 (Electronic)
ISSN-L
0066-4804
Publication state
Published
Issued date
11/2019
Peer-reviewed
Oui
Volume
63
Number
11
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Publication Status: epublish
Abstract
The mechanisms of terbinafine resistance in a set of clinical isolates of Trichophyton rubrum have been studied recently. Of these isolates, TIMM20092 also showed reduced sensitivity to azoles. The azole resistance of TIMM20092 could be inhibited by milbemycin oxime, prompting us to examine the potential of T. rubrum to develop resistance through multidrug efflux transporters. The introduction of a T. rubrum cDNA library into Saccharomyces cerevisiae allowed the isolation of one transporter of the major facilitator superfamily (MFS) conferring resistance to azoles (TruMFS1). To identify more azole efflux pumps among 39 ABC and 170 MFS transporters present within the T. rubrum genome, we performed a BLASTp analysis of Aspergillus fumigatus, Candida albicans, and Candida glabrata on transporters that were previously shown to confer azole resistance. The identified candidates were further tested by heterologous gene expression in S. cerevisiae Four ABC transporters (TruMDR1, TruMDR2, TruMDR3, and TruMDR5) and a second MFS transporter (TruMFS2) proved to be able to operate as azole efflux pumps. Milbemycin oxime inhibited only TruMDR3. Expression analysis showed that both TruMDR3 and TruMDR2 were significantly upregulated in TIMM20092. TruMDR3 transports voriconazole (VRC) and itraconazole (ITC), while TruMDR2 transports only ITC. Disruption of TruMDR3 in TIMM20092 abolished its resistance to VRC and reduced its resistance to ITC. Our study highlights TruMDR3, a newly identified transporter of the ABC family in T. rubrum, which can confer azole resistance if overexpressed. Finally, inhibition of TruMDR3 by milbemycin suggests that milbemycin analogs could be interesting compounds to treat dermatophyte infections in cases of azole resistance.
Keywords
ATP Binding Cassette Transporter, Subfamily B/metabolism, ATP-Binding Cassette Transporters/metabolism, Antifungal Agents/metabolism, Antifungal Agents/pharmacology, Azoles/metabolism, Azoles/pharmacology, Drug Resistance, Fungal, Humans, Macrolides/metabolism, Macrolides/pharmacology, Microbial Sensitivity Tests, Terbinafine/metabolism, Terbinafine/pharmacology, Tinea/drug therapy, Tinea/microbiology, Trichophyton/drug effects, Trichophyton/metabolism, ABC transporters, MFS transporters, Trichophyton rubrum, antifungal resistance, dermatophytes, itraconazole, voriconazole
Pubmed
Web of science
Open Access
Yes
Create date
13/09/2019 11:22
Last modification date
23/04/2024 6:09