Journal de mycologie medicale · 2015
Mechanisms of resistance to fluconazole in Candida albicans clinical isolates from Iranian HIV-infected patients with oropharyngeal candidiasis.
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Salari S, Khosravi A R, Mousavi S A A, Nikbakht-Brojeni G H
Аннотация
OBJECTIVES: The opportunistic pathogen Candida albicans is the major agent of oropharyngeal candidiasis (OPC) in HIV/AIDS patients. The increased use of fluconazole can lead to the emergence of azole-resistant strains and treatment failures in PLWH (people living with HIV) receiving long-term therapy for OPC. The purpose of this study was to evaluate CDR1, CDR2, MDR1, and ERG11 gene expression in C. albicans clinically isolated from HIV-infected patients in Iran.
PATIENTS AND METHODS: In this study, we evaluated the molecular mechanisms of azole resistance in 20 fluconazole-resistant C. albicans isolates obtained from Iranian HIV-infected patients with oropharyngeal candidiasis by Real-Time polymerase chain reaction.
RESULTS: The overexpression of drug efflux pump CDR1 gene was found to be the major resistance mechanism observed in these isolates. The overexpression of the CDR1 gene correlated strongly with increasing resistance to fluconazole (P<0.05). Additionally, an increased level of mRNA in ERG11 was not observed in any of the tested isolates.
CONCLUSIONS: Our findings suggested that the CDR1 gene expression to fluconazole resistance in C. albicans is greater than other known genes.
PATIENTS AND METHODS: In this study, we evaluated the molecular mechanisms of azole resistance in 20 fluconazole-resistant C. albicans isolates obtained from Iranian HIV-infected patients with oropharyngeal candidiasis by Real-Time polymerase chain reaction.
RESULTS: The overexpression of drug efflux pump CDR1 gene was found to be the major resistance mechanism observed in these isolates. The overexpression of the CDR1 gene correlated strongly with increasing resistance to fluconazole (P<0.05). Additionally, an increased level of mRNA in ERG11 was not observed in any of the tested isolates.
CONCLUSIONS: Our findings suggested that the CDR1 gene expression to fluconazole resistance in C. albicans is greater than other known genes.
Предметные рубрики MeSH
AIDS-Related Opportunistic InfectionsATP Binding Cassette Transporter, Subfamily B, Member 1AdultAntifungal AgentsCandida albicansCandidiasis, OralDNA, ComplementaryDose-Response Relationship, DrugDrug Resistance, FungalFemaleFluconazoleFungal ProteinsGene Expression Regulation, FungalHumansIranMaleMembrane Transport ProteinsMicrobial Sensitivity TestsPharyngeal DiseasesRNA, FungalReal-Time Polymerase Chain Reaction