Antifungal activity directed toward the cell wall by 2-cyclohexylidenhydrazo-4-phenyl-thiazole against Candida albicans

Nívea P. de Sá, Ana P. Pôssa, Pilar Perez, Jaqueline M.S. Ferreira, Nayara C. Fonseca, Cleudiomar I. Lino, Lana B. Cruz, Renata B. de Oliveira, Carlos A. Rosa, Beatriz M. Borelli, Eleftherios Mylonakis, Beth B. Fuchs, Susana Johann

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Background: The increasing incidence of invasive forms of candidiasis and resistance to antifungal therapy leads us to seek new and more effective antifungal compounds. Objective: To investigate the antifungal activity and toxicity as well as to evaluate the potential targets of 2-cyclohexylidenhydrazo-4-phenyl-thiazole (CPT) in Candida albicans. Methods: The antifungal activity of CPT against the survival of C. albicans was investigated in Caeno-rhabditis elegans. Additionally, we determined the effect of CPT on the inhibition of C. albicans adhesion capacity to buccal epithelial cells (BECs), the toxicity of CPT in mammalian cells, and the potential targets of CPT in C. albicans. Results: CPT exhibited a minimum inhibitory concentration (MIC) value of 0.4-1.9 µg/mL. Furthermore, CPT at high concentrations (>60 x MIC) showed no or low toxicity in HepG2 cells and <1% haemolysis in human erythrocytes. In addition, CPT decreased the adhesion capacity of yeasts to the BECs and prolonged the survival of C. elegans infected with C. albicans. Analysis of CPT-treated cells showed that their cell wall was thinner than that of untreated cells, especially the glucan layer. We found that there was a significantly lower quantity of 1,3-β-D-glucan present in CPT-treated cells than that in untreated cells. Assays performed on several mutant strains showed that the MIC value of CPT was high for its antifungal activity on yeasts with defective 1,3-β-glucan synthase. Conclusion: In conclusion, CPT appears to target the cell wall of C. albicans, exhibits low toxicity in mammalian cells, and prolongs the survival of C. elegans infected with C. albicans.

Original languageEnglish (US)
Pages (from-to)428-438
Number of pages11
JournalInfectious Disorders - Drug Targets
Volume19
Issue number4
DOIs
StatePublished - 2019

Keywords

  • 2-cyclohexylidenhydrazo-4-phenyl-thiazole
  • Anticandidal activity
  • Candida albicans
  • Synthetic compounds
  • Virulence
  • β-glucan

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology
  • Microbiology (medical)

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