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Updated: May 12, 2026
08:24
Size Matters: Measurement of Capsule Diameter in Cryptococcus neoformans
Published on: February 27, 2018
Titan cells in Cryptococcus neoformans: cells with a giant impact
Oscar Zaragoza1, Kirsten Nielsen
1National Centre for Microbiology, Instituto de Salud Carlos III, Carretera Majadahonda-Pozuelo, Km 2, Majadahonda 28220, Madrid, Spain.
Current Opinion in Microbiology
|April 17, 2013
Summary
Cryptococcus neoformans can form large titan cells during infection, aiding fungal survival and spread. This review details titan cell formation and their role in cryptococcosis pathogenesis.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Pathogen Adaptation
Background:
- Cryptococcus neoformans is a yeast pathogen infecting immunocompromised individuals.
- Virulence factors like capsule and melanin are known, but morphogenetic programs are less understood.
- Titan cells, dramatically enlarged C. neoformans cells, are observed during infection.
Purpose of the Study:
- To review the current knowledge on C. neoformans titan cells.
- To describe their phenotypic characteristics and formation mechanisms.
- To discuss their significance in cryptococcosis.
Main Methods:
- Literature review of studies on C. neoformans titan cells.
- Analysis of phenotypic data and proposed formation mechanisms.
- Synthesis of information on the role of titan cells in pathogenesis.
Main Results:
- Titan cells are significantly larger (up to 100μm) than typical C. neoformans cells (5-7μm).
- Titan cell formation is a programmed response to host environment.
- These cells are implicated in fungal survival, dissemination (especially to the CNS), and latency.
Conclusions:
- C. neoformans titan cells represent a key adaptation strategy.
- Understanding titan cells is crucial for developing new therapeutic approaches.
- Further research is needed to fully elucidate their role in cryptococcosis.
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