1. Hyperexpression of CDRs and HWP1 genes negatively impacts on Candida albicans virulence
- Author
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Maras, B., Maggiore, A., Mignogna, G., D&apos, Erme, M., and Angiolella, L.
- Subjects
Antifungal Agents ,Gene Expression ,Yeast and Fungal Models ,Pathology and Laboratory Medicine ,Candida ,drug resistance ,fluconazole ,micafungin ,biofilm ,Microbial Physiology ,Gene Expression Regulation, Fungal ,Candida albicans ,Medicine and Health Sciences ,Bacterial Physiology ,Fluconazole ,Fungal Pathogens ,0303 health sciences ,Multidisciplinary ,Membrane Glycoproteins ,biology ,Virulence ,Fungal genetics ,Candidiasis ,Eukaryota ,Phenotype ,Adhesins ,Corpus albicans ,Lepidoptera ,Experimental Organism Systems ,Medical Microbiology ,Larva ,Medicine ,Female ,Pathogens ,medicine.drug ,Research Article ,Virulence Factors ,Science ,Hyphae ,Mycology ,Microbial Sensitivity Tests ,Research and Analysis Methods ,Microbiology ,Fungal Proteins ,03 medical and health sciences ,Drug Resistance, Fungal ,Microbial Control ,medicine ,Genetics ,Animals ,Humans ,Fungal Genetics ,Gene ,Microbial Pathogens ,030304 developmental biology ,Pharmacology ,030306 microbiology ,Micafungin ,Organisms ,Fungi ,Biology and Life Sciences ,Membrane Transport Proteins ,Bacteriology ,biology.organism_classification ,Yeast ,Bacterial adhesin ,Animal Studies ,Antimicrobial Resistance - Abstract
C. albicans is a commensal organism present in the human microbiome of more than 60% of the healthy population. Transition from commensalism to invasive candidiasis may occur after a local or a general failure of host’s immune system. This transition to a more virulent phenotype may reside either on the capacity to form hyphae or on an acquired resistance to antifungal drugs. Indeed, overexpression of genes coding drug efflux pumps or adhesins, cell wall proteins facilitating the contact between the fungus and the host, usually marks the virulence profile of invasive Candida spp. In this paper, we compare virulence of two clinical isolates of C. albicans with that of laboratory-induced resistant strains by challenging G. mellonella larvae with these pathogens along with monitoring transcriptional profiles of drug efflux pumps genes CDR1, CDR2, MDR1 and the adhesin genes ALS1 and HWP1. Although both clinical isolates were found resistant to both fluconazole and micafungin they were found less virulent than laboratory-induced resistant strains. An unexpected behavior emerged for the former clinical isolate in which three genes, CDR1, CDR2 and HWP1, usually correlated with virulence, although hyperexpressed, conferred a less aggressive phenotype. On the contrary, in the other isolate, we observed a decreased expression of CDR1, CDR2 and HWP1as well as of MDR1 and ALS1 that may be consistent with the less aggressive performance observed in this strain. These altered gene expressions might directly influence Candida virulence or they might be an epiphenomenon of a vaster rearrangement occurred in these strains during the challenge with the host’s environment. An in-deepth comprehension of this scenario could be crucial for developing interventions able to counteract C. albicans invasiveness and lethality.
- Published
- 2021