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Fungal morphogenesis and host invasion
Neil A R Gow1, Alistair J P Brown, Frank C Odds
1Department of Molecular and Cell Biology, Institute of Medical Sciences, University of Aberdeen, AB25 2ZD, Aberdeen, UK. n.gow@abdn.ac.uk
Abstract:
Many fungal pathogens undergo morphological transformations during host invasion. However, the significance of this for fungal pathogenesis is not clear. Both yeast and hyphal cells have properties well suited to tissue invasion and evasion of the immune system. However, molecular control circuits that regulate morphogenesis also regulate the expression of other virulence traits. To establish the extent to which morphogenesis impacts on pathogenesis, it is necessary to characterise the morphology of the fungus at different stages and locations during the natural history of a disease and to untangle how gene expression is modulated at these stages. This review considers the role of morphogenesis in fungal infection and argues that no simple, universal relationship can be drawn between morphology and the invasive potential of a fungus.
Insights
Fungal pathogens change shape during infection, but the impact on disease is complex. Understanding fungal morphogenesis and gene expression is key to understanding virulence and developing treatments.
Area of Science:
- Mycology
- Pathogenesis
- Molecular Biology
Background:
- Fungal pathogens exhibit morphological transformations, such as yeast-to-hyphal transitions, during host invasion.
- The precise role of these morphological changes in fungal pathogenesis remains incompletely understood.
- Both yeast and hyphal forms possess distinct advantages for tissue invasion and immune system evasion.
Purpose of the Study:
- To review the current understanding of fungal morphogenesis in the context of host-pathogen interactions.
- To explore the relationship between morphological changes and the expression of virulence factors in fungal pathogens.
- To assess the impact of fungal morphology on the overall pathogenesis of fungal infections.
Main Methods:
- Literature review of studies investigating fungal morphology and pathogenesis.
- Analysis of molecular mechanisms controlling fungal morphogenesis and virulence gene expression.
- Examination of fungal behavior at different stages and locations during disease progression.
Main Results:
- Morphological plasticity in fungal pathogens is common during host invasion.
- Molecular pathways regulating morphogenesis are often intertwined with those controlling virulence traits.
- No straightforward, universal correlation exists between a fungus's morphology and its invasive capability.
Conclusions:
- Fungal morphogenesis is a critical factor in pathogenesis, but its impact is context-dependent.
- Understanding the dynamic interplay between fungal form and function is essential for developing effective antifungal strategies.
- Future research should focus on dissecting the complex regulatory networks governing fungal morphology and virulence.