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Updated: Jun 9, 2025
Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans
Published on: December 19, 2014
Elements of dissemination in cryptococcosis
Joseph M Bednarek1, Jessica C S Brown1
1School of Biological Sciences, University of Utah, Salt Lake City, Utah, USA.
Abstract:
As healthcare improves and our ability to support patients with compromised immune systems increases, such patients become more vulnerable to microbes in the environment. These include fungal pathogens such as Cryptococcus neoformans, the primary cause of fungal meningitis and a top priority pathogen on the World Health Organization fungal pathogen list. Like many other environmental pathogens, C. neoformans must adapt to and thrive in diverse environments in order to cause disease: (i) the environmental niche, (ii) the lungs following inhalation of infectious particles, (iii) the bloodstream and/or lymphatic system during dissemination, and (iv) the central nervous system (CNS), where it causes a deadly cryptococcal meningoencephalitis. Because CNS infection is the driver of mortality and the presenting illness, understanding the dissemination process from both host and fungal perspectives is important for treating these infections. In this review, we discuss the different stages of dissemination, how fungal cells interact with host cells during disease, and the ability to adapt to different environments within hosts.
Insights
Cryptococcus neoformans causes deadly fungal meningitis. This review explores how this pathogen disseminates through the host, from initial infection to the central nervous system.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Pathogen Biology
Background:
- Increasing numbers of immunocompromised patients face heightened risks from environmental microbes.
- Cryptococcus neoformans is a leading cause of fungal meningitis and a WHO priority pathogen.
- Effective treatment requires understanding dissemination from the environment to the central nervous system (CNS).
Purpose of the Study:
- To review the dissemination stages of Cryptococcus neoformans.
- To examine host-fungal interactions during cryptococcal meningoencephalitis.
- To understand fungal adaptation to diverse host environments.
Main Methods:
- Review of existing literature on Cryptococcus neoformans pathogenesis.
- Analysis of host-pathogen interactions during dissemination.
- Examination of fungal adaptation strategies in vivo.
Main Results:
- Cryptococcus neoformans disseminates through distinct stages: environmental niche, lungs, bloodstream/lymphatics, and CNS.
- Host cell interactions are critical for fungal survival and spread.
- Fungal adaptation is key to overcoming host defenses and establishing infection.
Conclusions:
- Understanding Cryptococcus neoformans dissemination is crucial for combating cryptococcal meningoencephalitis.
- Targeting fungal adaptation and host interactions may offer new therapeutic strategies.
- Further research into the host-pathogen dynamics is essential for improving patient outcomes.
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