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Use of In Vivo Imaging to Screen for Morphogenesis Phenotypes in Candida albicans Mutant Strains During Active Infection in a Mammalian Host
Published on: October 12, 2022
Comparative evolution of morphological regulatory functions in Candida species
Erika Lackey1, Geethanjali Vipulanandan, Delma S Childers
1Department of Microbiology and Immunology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA.
Eukaryotic Cell
|August 6, 2013
Summary
Morphological regulation in Candida species is partially conserved. Key regulator UME6 drives filamentation and biofilm formation in non-albicans Candida species, suggesting conserved mechanisms evolved for niche-specific adaptation.
Area of Science:
- Mycology
- Molecular Biology
- Evolutionary Biology
Background:
- Morphological transitions are crucial for fungal virulence, especially in Candida albicans.
- Regulatory mechanisms for C. albicans morphogenesis are known, but less so for non-albicans Candida species (NACS).
Purpose of the Study:
- To investigate conserved morphological regulatory mechanisms in NACS.
- To identify specific filament-inducing conditions for NACS.
- To explore the role of conserved genes like UME6 and NRG1 in NACS filamentation.
Main Methods:
- Identified optimal filament-inducing conditions for C. tropicalis, C. parapsilosis, and C. guilliermondii.
- Analyzed the induction of C. albicans filament-specific target genes in NACS.
- Overexpressed UME6 in C. tropicalis and C. parapsilosis to assess its impact on filamentation and biofilm formation.
Main Results:
- NACS exhibit limited filamentation under specific conditions, suggesting niche adaptation.
- Only a subset of conserved C. albicans filament-specific genes were induced in NACS.
- UME6 overexpression enhanced filamentation and biofilm formation in C. tropicalis and C. parapsilosis.
- NRG1 showed a partly conserved role in NACS filamentation.
Conclusions:
- Morphological regulatory functions are partially conserved between C. albicans and NACS.
- Evolutionary differences in Candida filamentation may stem from altered expression of conserved machinery.
- NACS' evolved regulatory mechanisms allow adaptation to specific host environmental cues.
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