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Volume 73, Issue 5

Antifungal activity of human antimicrobial peptides targeting apoptosis in No Access

This article is part of the Candida collection.

Abstract

Innovative antifungal therapies are of crucial importance to combat the potentially life-threatening infections linked to the multidrug-resistant fungal pathogen . Induction of regulated cell death, apoptosis, could provide an outline for future therapeutics. Human antimicrobial peptides (AMPs), well-known antifungal compounds, have shown the ability to induce apoptosis in pathogenic fungi.

Although it is known that AMPs possess antifungal activity against , their ability to induce apoptosis requires further investigations.

This study evaluated the effects of AMPs on the induction of apoptosis in .

Human neutrophil peptide-1 (HNP-1), human β-Defensins-3 (hBD-3) and human salivary histatin 5 (His 5) were assessed against two clinical isolates. Apoptosis hallmarks were examined using FITC-Annexin V/PI double labelling assay and terminal deoxynucleotidyl transferase deoxynucleotidyl transferase nick-end labelling (TUNEL) to detect phosphatidylserine externalization and DNA fragmentation, respectively. Then, several intracellular triggers were studied using JC-10 staining, spectrophotometric assay and 2′,7′-dichlorofluorescin diacetate staining to measure the mitochondrial membrane potential, cytochrome-c release and reactive oxygen species (ROS) production, respectively.

FITC-Annexin V/PI staining and TUNEL analysis revealed that exposure of cells to HNP-1 and hBD-3 triggered both early and late apoptosis, while His 5 caused significant necrosis. Furthermore, HNP-1 and hBD-3 induced significant mitochondrial membrane depolarization, which resulted in substantial cytochrome c release. In contrast to His 5, which showed minimal mitochondrial depolarization and no cytochrome c release. At last, all peptides significantly increased ROS production, which is related to both types of cell death. Therefore, these peptides represent promising and effective antifungal agents for treating invasive infections caused by multidrug-resistant

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): antimicrobial peptides , apoptosis , Candida auris , necrosis and ROS
Funding
This study was supported by the:
  • National Health Laboratory Service (Award RA21-013)
    • Principle Award Recipient: MrudulaPatel
© 2024 The Authors
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2024-05-14
2025-04-20
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Antifungal activity of human antimicrobial peptides targeting apoptosis in Candida auris
J. Med. Microbiol. 73, 001835 (2024); https://doi.org/10.1099/jmm.0.001835
/content/journal/jmm/10.1099/jmm.0.001835
/content/journal/jmm/10.1099/jmm.0.001835
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