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Updated: Aug 5, 2026

Macrophage Cholesterol Depletion and Its Effect on the Phagocytosis of Cryptococcus neoformans
11:07

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

Published on: December 19, 2014

The AP-1 adaptor complex is required for cell surface modifications and the survival of Cryptococcus neoformans in

Eddy Sánchez-León1, Kabir Bhalla1,2, Victoria French3

  • 1Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada.

Infection and Immunity
|August 4, 2026
PubMed

Insights

The adaptor protein complex 1 (AP-1) is crucial for the pathogenic yeast Cryptococcus neoformans to cause disease. AP-1 regulates cell surface factors essential for fungal survival and virulence.

Area of Science:

  • Mycology
  • Cell Biology
  • Pathogenesis

Background:

  • Cryptococcus neoformans causes life-threatening infections in immunocompromised individuals.
  • Fungal virulence relies on cell-surface components like the polysaccharide capsule.
  • Mechanisms for trafficking virulence factors to the cell surface are not well understood.

Purpose of the Study:

  • To investigate the role of adaptor protein complex 1 (AP-1) in Cryptococcus neoformans virulence.
  • To understand how AP-1 influences the transport of cell-surface materials.

Main Methods:

  • Utilized mutants lacking specific subunits of the AP-1 complex.
  • Analyzed defects in capsule formation, cell morphology, melanin production, and urease secretion.

Main Results:

  • AP-1 mutants showed altered capsule size and cell morphology.
  • Melanin production and urease secretion were impaired in AP-1 mutants.
  • AP-1 complex is essential for C. neoformans survival within phagocytic cells.

Conclusions:

  • The AP-1 complex is vital for Cryptococcus neoformans pathogenesis.
  • Findings elucidate the endomembrane trafficking machinery essential for fungal virulence.
Keywords:
endomembrane traffickingfungal pathogenesisphagocytosisvirulence

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