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Updated: Jan 10, 2026
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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
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Nonfilamentous C. albicans mutants are avirulent
H J Lo1, J R Köhler, B DiDomenico
1Whitehead Institute for Biomedical Research and Department of Biology, Massachusetts Institute of Technology, Cambridge 02142, USA.
Cell
|September 23, 1997
Summary
The study reveals that the double mutant of Candida albicans, lacking both Cph1p and Efg1p proteins, cannot form filaments and loses its virulence. This finding highlights key regulators of fungal morphology and pathogenicity.
Area of Science:
- Microbiology
- Molecular Biology
- Mycology
Background:
- Candida albicans and Saccharomyces cerevisiae exhibit yeast-to-filamentous growth transitions.
- This morphological switch is crucial for fungal development and pathogenicity.
- Regulatory proteins control these developmental pathways in both species.
Purpose of the Study:
- To investigate the roles of Cph1p and Efg1p in Candida albicans filamentous growth.
- To determine the impact of combined Cph1p and Efg1p deficiency on Candida albicans virulence.
Main Methods:
- Genetic analysis of Candida albicans using double mutant strains (cph1/cph1 efg1/efg1).
- Assessment of filamentous growth (hyphae, pseudohyphae) under various stimuli (serum, macrophages).
- Evaluation of virulence in a mouse model.
Main Results:
- The Candida albicans cph1/cph1 efg1/efg1 double mutant is completely defective in hyphal and pseudohyphal formation.
- This double mutant remains locked in the yeast form.
- The cph1/cph1 efg1/efg1 double mutant exhibits avirulence in a mouse model.
Conclusions:
- Cph1p and Efg1p are essential, non-redundant regulators of Candida albicans filamentous growth.
- Disruption of filamentous growth via these regulators significantly attenuates virulence.
- Understanding these pathways offers potential targets for antifungal therapies.
