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Updated: May 6, 2026

Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans
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Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans

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Does Cryptococcus neoformans infection alter antifungal distribution: an animal model exploring pharmacokinetic

Izabel Almeida Alves1,2,3, Keli Jaqueline Staudt3,4, Bruna Gaelzer Silva Torres3

  • 1Faculdade de Farmácia, Departamento do Medicamento, Universidade Federal da Bahia, Salvador, Bahia, Brasil.

Future Microbiology
|April 3, 2025
PubMed
Abstract

Insights

This study modeled Cryptococcus neoformans meningitis in rats, finding higher antifungal drug distribution in infected brains. This model aids future pharmacokinetic investigations for cryptococcal meningitis.

Area of Science:

  • * Infectious Diseases
  • * Pharmacokinetics
  • * Mycology

Background:

  • * Cryptococcus neoformans is a significant cause of meningitis, particularly in immunocompromised individuals.
  • * Understanding antifungal drug distribution in the central nervous system is crucial for effective treatment.
  • * Established animal models are vital for studying disease pathogenesis and drug efficacy.

Purpose of the Study:

  • * To assess disseminated Cryptococcus neoformans meningitis in Wistar rats.
  • * To evaluate the impact of infection on biochemical parameters and brain vascular permeability.
  • * To determine the brain distribution of fluconazole using microdialysis.

Main Methods:

  • * Histological and microbiological assays were used to detect yeast presence in tissues.
  • * Biochemical parameters (urea, GOT, GPT, CK, albumin, leukocytes) and brain vascular permeability (Evans blue) were measured.
  • * Fluconazole levels in the brain were quantified via microdialysis (µD).

Main Results:

  • * Significant differences in albumin, urea, GPT, and CK levels were observed between healthy and infected rats.
  • * Increased brain vascular permeability was noted in infected animals (Evans blue test).
  • * Fluconazole distribution in the brain was significantly higher in infected rats compared to healthy controls.

Conclusions:

  • * The developed rat model of cryptococcal meningitis mimics key aspects of human disease.
  • * The model is suitable for pharmacokinetic investigations of antifungal agents.
  • * Findings support further research into optimizing antifungal therapy for cryptococcal meningitis.
Keywords:
Cryptococcus neoformanscryptococcosisdisseminated meningitismicrodialysismodels of infections

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