Candida glabrata Mutations Increase Drug Resistance and Virulence
Author Information
Author(s): Ferrari Sélène, Ischer Françoise, Calabrese David, Posteraro Brunella, Sanguinetti Maurizio, Fadda Giovanni, Rohde Bettina, Bauser Christopher, Bader Oliver, Sanglard Dominique
Primary Institution: Institute of Microbiology, University of Lausanne and University Hospital Center, Lausanne, Switzerland
Hypothesis
Do gain of function mutations in CgPDR1 contribute to both antifungal resistance and increased virulence in Candida glabrata?
Conclusion
CgPDR1 mutations not only mediate azole resistance but also enhance the virulence of Candida glabrata.
Supporting Evidence
- 57 amino acid substitutions in CgPDR1 were identified, linked to increased virulence.
- Isolates with CgPDR1 mutations showed higher fungal loads in infected mice.
- Mutations in CgPDR1 were associated with treatment failure in fluconazole therapy.
- Clinical isolates demonstrated a correlation between azole resistance and virulence.
- Specific mutations conferred hyperactivity to CgPdr1p, enhancing ABC transporter gene expression.
- Animal models showed that azole-resistant strains were more virulent than susceptible strains.
- Monitoring of CgPDR1 mutations is crucial for understanding resistance in clinical settings.
- Findings suggest that CgPDR1 mutations provide a selective advantage under host conditions.
Takeaway
Some changes in the genes of a yeast called Candida glabrata help it resist medicine and make it more harmful to people.
Methodology
The study involved analyzing CgPDR1 mutations in clinical isolates and testing their effects on azole resistance and virulence in mouse models.
Potential Biases
Potential bias in selecting clinical isolates and the specific animal models used.
Limitations
The study primarily focused on specific mutations and may not represent all possible mutations affecting virulence.
Participant Demographics
Clinical isolates from various patients, including immunocompromised individuals.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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