Related Experiment Video
Updated: Jun 29, 2025
08:48
Bio-energetics Investigation of Candida albicans Using Real-time Extracellular Flux Analysis
Published on: March 19, 2019
7.0K
Achieving Resilience in Aging: How Mitochondrial Modulation Drives Age-associated Fluconazole Tolerance in
Biorxiv : the Preprint Server for Biology
|April 8, 2024
Summary
Older Cryptococcus neoformans cells develop fluconazole tolerance through increased ergosterol synthesis and ABC transporters, driven by mitochondrial metabolic changes and reactive oxygen species. This age-dependent resilience impacts treatment efficacy.
Area of Science:
- Mycology
- Molecular Biology
- Infectious Diseases
Background:
- Cryptococcus neoformans causes life-threatening meningoencephalitis, with older cells exhibiting enhanced antifungal tolerance.
- Current treatments for cryptococcal infections are often inadequate, leading to high mortality rates.
Approach:
- Investigated the roles of ergosterol synthesis, ATP-binding cassette (ABC) transporters, and mitochondrial metabolism in age-dependent fluconazole tolerance.
- Analyzed transcriptional and phenotypic changes in aging C. neoformans cells.
Key Points:
- Old C. neoformans cells upregulate ergosterol production and ABC transporters.
- Increased mitochondrial metabolic activity in old cells leads to higher ATP production and reactive oxygen species (ROS).
- ROS-induced mitochondrial fragmentation correlates with enhanced fluconazole tolerance.
Conclusions:
- Mitochondrial metabolic alterations in aging C. neoformans cells drive ergosterol synthesis and ABC transporter upregulation.
- These changes collectively contribute to fluconazole tolerance in older fungal cells.
- Understanding these mechanisms can inform targeted antifungal therapies for cryptococcal infections.
Related Concept Videos
01:37Mitochondria
12.4K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
12.4K
01:46Electron Transport Chain: Complex I and II
13.1K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
13.1K