CYP51 Mutations in the Fusarium solani Species Complex: First Clue to Understand the Low Susceptibility to Azoles of the Genus Fusarium

被引：11

作者：

Vermeulen, Pierre ^{[1
,2
]}

Gruez, Arnaud ^{[3
]}

Babin, Anne-Lyse ^{[1
]}

Frippiat, Jean-Pol ^{[1
]}

Machouart, Marie ^{[1
,2
]}

Debourgogne, Anne ^{[1
,2
]}

机构：

[1] Univ Lorraine, Fac Med, Lab Stress Immun Pathogenes, UR 7300, 9 Ave Foret Haye, F-54500 Vandoeuvre Les Nancy, France

[2] CHRU Nancy, Hop Brabois, Serv Microbiol, 11 Allee Morvan, F-54511 Vandoeuvre Les Nancy, France

[3] Univ Lorraine, CNRS, IMoPA, F-54000 Nancy, France

来源：

JOURNAL OF FUNGI | 2022年 / 8卷 / 05期

关键词：

Fusarium; antifungal susceptibility; CYP51; azole; ASPERGILLUS-FUMIGATUS; RESISTANCE MECHANISM; ANTIFUNGAL AGENTS; INFECTIONS; SUBSTITUTION; SEQUENCE;

D O I：

10.3390/jof8050533

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Members of Fusarium solani species complex (FSSC) are cosmopolitan filamentous fungi responsible for invasive fungal infections in immunocompromised patients. Despite the treatment recommendations, many strains show reduced sensitivity to voriconazole. The objective of this work was to investigate the potential relationship between azole susceptibility and mutations in CYP51 protein sequences. Minimal inhibitory concentrations (MICs) for azole antifungals have been determined using the CLSI (Clinical and Laboratory Standards Institute) microdilution method on a panel of clinical and environmental strains. CYP51A, CYP51B and CYP51C genes for each strain have been sequenced using the Sanger method. Amino acid substitutions described in multiple azole-resistant Aspergillus fumigatus (mtrAf) strains have been sought and compared with other Fusarium complexes' strains. Our results show that FSSC exhibit point mutations similar to those described in mtrAf. Protein sequence alignments of CYP51A, CYP51B and CYP51C have highlighted different profiles based on sequence similarity. A link between voriconazole MICs and protein sequences was observed, suggesting that these mutations could be an explanation for the intrinsic azole resistance in the genus Fusarium. Thus, this innovative approach provided clues to understand low azole susceptibility in FSSC and may contribute to improving the treatment of FSSC infection.

引用

页数：12

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