Cited by 134Fungal Infections and StudiesFungal and yeast genetics researchAntifungal resistance and susceptibility

Role of a CUF1/CTR4 copper regulatory axis in the virulence of Cryptococcus neoformans

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Waterman, Scott R., Hacham, Moshe, Hu, Guowu, Zhu, Xudong, Park, Yoon-Dong, Shin, Soowan, Panepinto, John, Valyi-Nagy, Tibor +4 more·2007·Journal of Clinical Investigation

Abstract

The study of regulatory networks in human pathogens such as Cryptococcus neoformans provides insights into host-pathogen interactions that may allow for correlation of gene expression patterns with clinical outcomes.In the present study, deletion of the cryptococcal copper-dependent transcription factor 1 (Cuf1) led to defects in growth and virulence factor expression in low copper conditions.In mouse models, cuf1Δ strains exhibited reduced dissemination to the brain, but no change in lung growth, suggesting copper is limiting in neurologic infections.To examine this further, a biologic probe of available copper was constructed using the cryptococcal CUF1-dependent copper transporter, CTR4.Fungal cells demonstrated high CTR4 expression levels after phagocytosis by macrophage-like J774.16 cells and during infection of mouse brains, but not lungs, consistent with limited copper availability during neurologic infection.This was extended to human brain infections by demonstrating CTR4 expression during C. neoformans infection of an AIDS patient.Moreover, high CTR4 expression by cryptococcal strains from 24 solid organ transplant patients was associated with dissemination to the CNS.Our results suggest that copper acquisition plays a central role in fungal pathogenesis during neurologic infection and that measurement of stable traits such as CTR4 expression may be useful for risk stratification of individuals with cryptococcosis. Results Identification of a copper-dependent transcription factor in C. neoformans.Complementation of one of a series of previously described lac-Nonstandard abbreviations used: BAL, bronchoalveolar lavage; BCS, bathocuproinedisulfonic acid; CSF, cerebrospinal fluid; Ctr4, copper transporter 4; Cuf1, copperdependent transcription factor 1; YPD, yeast extract/peptone/dextrose medium.

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Authors
Waterman, S. R., Hacham, M., Hu, G., Zhu, X., Park, Y.-D., Shin, S., Panepinto, J., Valyi-Nagy, T., Beam, C., Husain, S., Singh, N., & Williamson, P. R.
Affiliations
  • University of Illinois Chicago (US)
  • University of Pittsburgh (US)
Corresponding author
Williamson, Peter R.
Venue
Journal of Clinical Investigation
Published
2007-03-01
Volume
117
Issue
3
Pages
794-802
ISSN
0021-9738 (ISSN-L)
OpenAlex
W1997557971
Cited by
134
References
67
Citations by year
2026: 3 · 2025: 2 · 2024: 5 · 2023: 6 · 2022: 4 · 2021: 7 · 2020: 8 · 2019: 6 · 2018: 8 · 2017: 13 · 2016: 8 · 2015: 4 · 2014: 9 · 2013: 6 · 2012: 11
FWCI
5.96
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5u01ai047087-03)
  • National Institute of Allergy and Infectious Diseases (R01AI049371, R01AI045995, AI45995, AI47087, AI 49371)
Topics
  • Health Sciences › Medicine › Epidemiology › Fungal Infections and Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
Keywords
Cryptococcus neoformans, copper uptake, fungal virulence, central nervous system infection, cryptococcosis, macrophage phagocytosis, solid organ transplant recipients, AIDS, risk stratification, host-pathogen interaction
MeSH terms
Adult, Animals, Brain, Copper, Cryptococcosis, Cryptococcus neoformans, Disease Models, Animal, Fungal Proteins, Humans, Lung, Macrophages, Middle Aged, Transcription Factors, Virulence, Gene Expression Regulation, Fungal, Cation Transport Proteins, Mice

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