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Bio-energetics Investigation of Candida albicans Using Real-time Extracellular Flux Analysis
Published on: March 19, 2019
Nutrient acquisition by pathogenic fungi: nutrient availability, pathway regulation, and differences in substrate
Christian B Fleck1, Felicitas Schöbel, Matthias Brock
1Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Microbial Biochemistry and Physiology, Beutenbergstr. 11a, 07745 Jena, Germany.
Abstract:
All pathogenic microorganisms have in common that they need to feed on nutrients available from their host. Therefore, the specific interruption of metabolic pathways is a promising approach which could lead to the discovery of new antimicrobial drugs. However, nutrient availability strongly varies in respect to the infected host niche and pathogens may possess different strategies to acquire nutrients. This review focuses on the differences in regulation and use of key metabolic pathways during infection by pathogenic fungi, especially in the filamentous fungus Aspergillus fumigatus and the dimorphic yeast Candida albicans. Besides universal metabolic pathways, emphasis is given on pathways, which are absent in humans and might, therefore, suit as antifungal drug targets. Niche-specific nutrient availability and different physiological strategies complicate the identification of metabolic pathways, which are essential for all pathogens at each step of the infection process.
Insights
Targeting microbial metabolism offers a route to new antimicrobial drugs. This review examines metabolic pathways in pathogenic fungi like Aspergillus fumigatus and Candida albicans, highlighting potential drug targets absent in humans.
Area of Science:
- Microbiology
- Biochemistry
- Drug Discovery
Background:
- Pathogenic microorganisms require host nutrients for survival.
- Targeting essential metabolic pathways is a key strategy for developing new antimicrobial drugs.
- Nutrient availability and pathogen strategies vary significantly across different host environments.
Purpose of the Study:
- To review and compare key metabolic pathways in pathogenic fungi, focusing on Aspergillus fumigatus and Candida albicans.
- To identify metabolic pathways essential for fungal survival during infection.
- To highlight potential antifungal drug targets, particularly those absent in human metabolism.
Main Methods:
- Literature review of fungal metabolism during infection.
- Comparative analysis of metabolic pathways in Aspergillus fumigatus and Candida albicans.
- Identification of conserved and unique metabolic strategies.
Main Results:
- Fungal pathogens utilize diverse strategies to acquire nutrients from hosts.
- Metabolic pathway regulation differs based on the host niche and fungal species.
- Several metabolic pathways, absent in humans, are crucial for fungal pathogens, representing potential drug targets.
Conclusions:
- Understanding fungal-specific metabolic pathways is critical for antifungal drug development.
- The complexity of nutrient acquisition and metabolic regulation poses challenges for identifying universally essential pathways.
- Targeting unique fungal metabolic vulnerabilities offers a promising avenue for novel antimicrobial therapies.
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