Cited by 47Antifungal resistance and susceptibilityFungal and yeast genetics researchNeutrophil, Myeloperoxidase and Oxidative Mechanisms

The Glycosylphosphatidylinositol-Anchored Protease Sap9 Modulates the Interaction of Candida albicans with Human Neutrophils

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Hornbach, Anke, Heyken, Antje, Schild, Lydia, Hube, Bernhard, Löffler, Jürgen, Kurzai, Oliver·2009·Infection and Immunity

Abstract

Human polymorphonuclear neutrophils (PMNs) play a major role in the immune defense against invasive Candida albicans infection. This fungal pathogen produces a set of aspartic proteases that directly contributes to virulence properties such as adhesion, tissue invasion, and immune evasion. We show here that, in contrast to other secreted proteases, the cell surface-associated isoform Sap9 has a major impact on the recognition of C. albicans by PMNs. SAP9 is required for the induction of PMN chemotaxis toward C. albicans filaments, an essential prerequisite of effective PMN activation. Furthermore, deletion of SAP9 leads to a mitigated release of reactive oxygen intermediates (ROI) in human PMNs and decreases C. albicans -induced apoptosis triggered by ROI formation. In confrontation assays, killing of a SAP9 deletion mutant is reduced in comparison to wild-type C. albicans . These data clearly implicate Sap9 protease activity in the initiation of protective innate immunity and suggest novel molecular mechanisms in C. albicans -host interaction leading to neutrophil activation.

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Authors
Hornbach, A., Heyken, A., Schild, L., Hube, B., Löffler, J., & Kurzai, O.
Affiliations
  • University of Würzburg (DE)
  • Leibniz-Institut für Naturstoff-Forschung und Infektionsbiologie e. V. - Hans-Knöll-Institut (HKI) (DE)
  • University of Würzburg, Department of Internal Medicine II, Würzburg, Germany
Corresponding author
Kurzai, Oliver
Venue
Infection and Immunity
Published
2009-12
Volume
77
Issue
12
Pages
5216-5224
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2114844963
Cited by
47
References
61
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 4 · 2017: 4 · 2016: 3 · 2015: 3 · 2014: 5 · 2013: 4 · 2012: 7
FWCI
3.21
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
Keywords
Candida albicans, neutrophils, aspartic protease, GPI-anchored proteins, neutrophil chemotaxis, reactive oxygen species, neutrophil apoptosis, innate immunity, fungal virulence, host-pathogen interaction, neutrophil killing
MeSH terms
Candida albicans, Fungal Proteins, Humans, Immunologic Factors, Neutrophils, Aspartic Acid Endopeptidases, Gene Deletion, Reactive Oxygen Species, Cell Migration Assays, Leukocyte

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