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High phosphate (up to 600 mM) induces pseudohyphal development in five wild type Candida albicans
Jacob M Hornby1, Raluca Dumitru, Kenneth W Nickerson
1School of Biological Sciences, University of Nebraska, Lincoln, NE 68588-0666, USA.
Abstract:
A method is described for the formation of nearly 100% pseudohyphae populations of wild-type Candida albicans A72. The method employs fungal growth at 37 degrees C (ca. 5x10(6) cells/ml) in a glucose-proline-N-acetyl-glucosamine medium supplemented with up to 600 mM phosphate (KH(2)PO(4)/K(2)HPO(4) 1:1) at pH 6.5. Four other strains of C. albicans (MEN, 10261, SG5314 and CAI-4) also formed pseudohyphae under these conditions, although the phosphate response profiles differed in the concentration required for each strain to form pseudohyphae.
Insights
Researchers developed a method to induce nearly 100% pseudohyphae in Candida albicans. This involves specific growth conditions, including high phosphate concentrations, promoting fungal morphology changes.
Area of Science:
- Mycology
- Microbiology
- Cell Biology
Background:
- Candida albicans is an opportunistic fungal pathogen.
- Pseudohyphae formation is a key virulence factor in Candida albicans.
- Controlling fungal morphology is crucial for understanding pathogenesis.
Purpose of the Study:
- To develop a method for efficient pseudohyphae formation in Candida albicans.
- To investigate the role of phosphate concentration in inducing pseudohyphae.
- To assess the applicability of the method across different Candida albicans strains.
Main Methods:
- Culturing wild-type Candida albicans A72 at 37°C in a defined medium.
- Supplementing the medium with high concentrations of phosphate (up to 600 mM KH2PO4/K2HPO4 1:1) at pH 6.5.
- Evaluating pseudohyphae formation in multiple Candida albicans strains under these conditions.
Main Results:
- Achieved nearly 100% pseudohyphae populations in wild-type Candida albicans A72.
- Demonstrated that high phosphate concentrations are critical for inducing pseudohyphae.
- Observed pseudohyphae formation in four other Candida albicans strains, with varying optimal phosphate concentrations.
Conclusions:
- A novel method for inducing high-yield pseudohyphae in Candida albicans was established.
- Phosphate availability is a significant environmental cue regulating Candida albicans morphology.
- The developed method provides a valuable tool for studying Candida albicans pseudohyphae and its role in infection.