Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex
The <i>Candida haemulonii</i> complex (<i>C. duobushaemulonii</i>, <i>C. haemulonii</i>, and <i>C. haemulonii</i> var. <i>vulnera</i>) is composed of emerging, opportunistic human fungal pathogens able to cause invasive infections with high...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-10-01
|
Series: | Journal of Fungi |
Subjects: | |
Online Access: | https://www.mdpi.com/2309-608X/6/4/215 |
id |
doaj-4c4b2b88d45a48a19db97b3687b51da1 |
---|---|
record_format |
Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Laura Nunes Silva Lívia de Souza Ramos Simone Santiago Carvalho Oliveira Lucas Barros Magalhães Eamim Daidrê Squizani Lívia Kmetzsch Marilene Henning Vainstein Marta Helena Branquinha André Luis Souza dos Santos |
spellingShingle |
Laura Nunes Silva Lívia de Souza Ramos Simone Santiago Carvalho Oliveira Lucas Barros Magalhães Eamim Daidrê Squizani Lívia Kmetzsch Marilene Henning Vainstein Marta Helena Branquinha André Luis Souza dos Santos Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex Journal of Fungi azole resistance efflux pumps fluconazole lanosterol 14α-demethylase non-<i>albicans Candida</i> species voriconazole |
author_facet |
Laura Nunes Silva Lívia de Souza Ramos Simone Santiago Carvalho Oliveira Lucas Barros Magalhães Eamim Daidrê Squizani Lívia Kmetzsch Marilene Henning Vainstein Marta Helena Branquinha André Luis Souza dos Santos |
author_sort |
Laura Nunes Silva |
title |
Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex |
title_short |
Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex |
title_full |
Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex |
title_fullStr |
Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex |
title_full_unstemmed |
Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species Complex |
title_sort |
insights into the multi-azole resistance profile in <i>candida haemulonii</i> species complex |
publisher |
MDPI AG |
series |
Journal of Fungi |
issn |
2309-608X |
publishDate |
2020-10-01 |
description |
The <i>Candida haemulonii</i> complex (<i>C. duobushaemulonii</i>, <i>C. haemulonii</i>, and <i>C. haemulonii</i> var. <i>vulnera</i>) is composed of emerging, opportunistic human fungal pathogens able to cause invasive infections with high rates of clinical treatment failure. This fungal complex typically demonstrates resistance to first-line antifungals, including fluconazole. In the present work, we have investigated the azole resistance mechanisms expressed in Brazilian clinical isolates forming the <i>C. haemulonii</i> complex. Initially, 12 isolates were subjected to an antifungal susceptibility test, and azole cross-resistance was detected in almost all isolates (91.7%). In order to understand the azole resistance mechanistic basis, the efflux pump activity was assessed by rhodamine-6G. The <i>C. haemulonii</i> complex exhibited a significantly higher rhodamine-6G efflux than the other non-<i>albicans Candida</i> species tested (<i>C. tropicalis</i>, <i>C. krusei</i>, and <i>C. lusitaneae</i>). Notably, the efflux pump inhibitors (Phe-Arg and FK506) reversed the fluconazole and voricolazole resistance phenotypes in the <i>C. haemulonii</i> species complex. Expression analysis indicated that the efflux pump (<i>ChCDR1</i>, <i>ChCDR2</i>, and <i>ChMDR1</i>) and <i>ERG11</i> genes were not modulated by either fluconazole or voriconazole treatments. Further, <i>ERG11</i> gene sequencing revealed several mutations, some of which culminated in amino acid polymorphisms, as previously reported in azole-resistant <i>Candida</i> spp. Collectively, these data point out the relevance of drug efflux pumps in mediating azole resistance in the <i>C. haemulonii</i> complex, and mutations in ERG11p may contribute to this resistance profile. |
topic |
azole resistance efflux pumps fluconazole lanosterol 14α-demethylase non-<i>albicans Candida</i> species voriconazole |
url |
https://www.mdpi.com/2309-608X/6/4/215 |
work_keys_str_mv |
AT lauranunessilva insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT liviadesouzaramos insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT simonesantiagocarvalhooliveira insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT lucasbarrosmagalhaes insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT eamimdaidresquizani insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT liviakmetzsch insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT marilenehenningvainstein insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT martahelenabranquinha insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex AT andreluissouzadossantos insightsintothemultiazoleresistanceprofileinicandidahaemuloniiispeciescomplex |
_version_ |
1724466003977437184 |
spelling |
doaj-4c4b2b88d45a48a19db97b3687b51da12020-11-25T03:56:16ZengMDPI AGJournal of Fungi2309-608X2020-10-01621521510.3390/jof6040215Insights into the Multi-Azole Resistance Profile in <i>Candida haemulonii</i> Species ComplexLaura Nunes Silva0Lívia de Souza Ramos1Simone Santiago Carvalho Oliveira2Lucas Barros Magalhães3Eamim Daidrê Squizani4Lívia Kmetzsch5Marilene Henning Vainstein6Marta Helena Branquinha7André Luis Souza dos Santos8Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, BrazilLaboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, BrazilLaboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, BrazilLaboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, BrazilCentro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul 91540-000, BrazilCentro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul 91540-000, BrazilCentro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul 91540-000, BrazilLaboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, BrazilLaboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, BrazilThe <i>Candida haemulonii</i> complex (<i>C. duobushaemulonii</i>, <i>C. haemulonii</i>, and <i>C. haemulonii</i> var. <i>vulnera</i>) is composed of emerging, opportunistic human fungal pathogens able to cause invasive infections with high rates of clinical treatment failure. This fungal complex typically demonstrates resistance to first-line antifungals, including fluconazole. In the present work, we have investigated the azole resistance mechanisms expressed in Brazilian clinical isolates forming the <i>C. haemulonii</i> complex. Initially, 12 isolates were subjected to an antifungal susceptibility test, and azole cross-resistance was detected in almost all isolates (91.7%). In order to understand the azole resistance mechanistic basis, the efflux pump activity was assessed by rhodamine-6G. The <i>C. haemulonii</i> complex exhibited a significantly higher rhodamine-6G efflux than the other non-<i>albicans Candida</i> species tested (<i>C. tropicalis</i>, <i>C. krusei</i>, and <i>C. lusitaneae</i>). Notably, the efflux pump inhibitors (Phe-Arg and FK506) reversed the fluconazole and voricolazole resistance phenotypes in the <i>C. haemulonii</i> species complex. Expression analysis indicated that the efflux pump (<i>ChCDR1</i>, <i>ChCDR2</i>, and <i>ChMDR1</i>) and <i>ERG11</i> genes were not modulated by either fluconazole or voriconazole treatments. Further, <i>ERG11</i> gene sequencing revealed several mutations, some of which culminated in amino acid polymorphisms, as previously reported in azole-resistant <i>Candida</i> spp. Collectively, these data point out the relevance of drug efflux pumps in mediating azole resistance in the <i>C. haemulonii</i> complex, and mutations in ERG11p may contribute to this resistance profile.https://www.mdpi.com/2309-608X/6/4/215azole resistanceefflux pumpsfluconazolelanosterol 14α-demethylasenon-<i>albicans Candida</i> speciesvoriconazole |