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Antifungal activity of compounds targeting the Hsp90-calcineurin pathway against various mould species.

Publication ,  Journal Article
Lamoth, F; Alexander, BD; Juvvadi, PR; Steinbach, WJ
Published in: J Antimicrob Chemother
May 2015

OBJECTIVES: Invasive mould infections are associated with a high mortality rate and the emergence of MDR moulds is of particular concern. Calcineurin and its chaperone, the heat shock protein 90 (Hsp90), represent an important pathway for fungal virulence that can be targeted at different levels. We investigated the antifungal activity of compounds directly or indirectly targeting the Hsp90-calcineurin axis against different mould species. METHODS: The in vitro antifungal activity of the anticalcineurin drug FK506 (tacrolimus), the Hsp90 inhibitor geldanamycin, the lysine deacetylase inhibitor trichostatin A and the Hsp70 inhibitor pifithrin-μ was assessed by the standard broth dilution method against 62 clinical isolates of Aspergillus spp. and non-Aspergillus moulds (Mucoromycotina, Fusarium spp., Scedosporium spp., Purpureocillium/Paecilomyces spp. and Scopulariopsis spp.) RESULTS: FK506 had variable antifungal activity against different Aspergillus spp. and was particularly active against Mucor spp. Geldanamycin had moderate antifungal activity against Fusarium spp. and Paecilomyces variotii. Importantly, trichostatin A had good activity against the triazole-resistant Aspergillus ustus and the amphotericin B-resistant Aspergillus terreus as well as the MDR Scedosporium prolificans. Moreover, trichostatin A exhibited synergistic interactions with caspofungin against A. ustus and with geldanamycin against Rhizopus spp. for which none of the other agents showed activity. Pifithrin-μ exhibited little antifungal activity. CONCLUSIONS: Targeting the Hsp90-calcineurin axis at different levels resulted in distinct patterns of susceptibility among different fungal species. Lysine deacetylase inhibition may represent a promising novel antifungal strategy against emerging resistant moulds.

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Published In

J Antimicrob Chemother

DOI

EISSN

1460-2091

Publication Date

May 2015

Volume

70

Issue

5

Start / End Page

1408 / 1411

Location

England

Related Subject Headings

  • Microbiology
  • Microbial Sensitivity Tests
  • HSP90 Heat-Shock Proteins
  • Fungi
  • Enzyme Inhibitors
  • Calcineurin
  • Antifungal Agents
  • 3214 Pharmacology and pharmaceutical sciences
  • 3202 Clinical sciences
  • 1115 Pharmacology and Pharmaceutical Sciences
 

Citation

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Lamoth, F., Alexander, B. D., Juvvadi, P. R., & Steinbach, W. J. (2015). Antifungal activity of compounds targeting the Hsp90-calcineurin pathway against various mould species. J Antimicrob Chemother, 70(5), 1408–1411. https://doi.org/10.1093/jac/dku549
Lamoth, Frédéric, Barbara D. Alexander, Praveen R. Juvvadi, and William J. Steinbach. “Antifungal activity of compounds targeting the Hsp90-calcineurin pathway against various mould species.J Antimicrob Chemother 70, no. 5 (May 2015): 1408–11. https://doi.org/10.1093/jac/dku549.
Lamoth F, Alexander BD, Juvvadi PR, Steinbach WJ. Antifungal activity of compounds targeting the Hsp90-calcineurin pathway against various mould species. J Antimicrob Chemother. 2015 May;70(5):1408–11.
Lamoth, Frédéric, et al. “Antifungal activity of compounds targeting the Hsp90-calcineurin pathway against various mould species.J Antimicrob Chemother, vol. 70, no. 5, May 2015, pp. 1408–11. Pubmed, doi:10.1093/jac/dku549.
Lamoth F, Alexander BD, Juvvadi PR, Steinbach WJ. Antifungal activity of compounds targeting the Hsp90-calcineurin pathway against various mould species. J Antimicrob Chemother. 2015 May;70(5):1408–1411.
Journal cover image

Published In

J Antimicrob Chemother

DOI

EISSN

1460-2091

Publication Date

May 2015

Volume

70

Issue

5

Start / End Page

1408 / 1411

Location

England

Related Subject Headings

  • Microbiology
  • Microbial Sensitivity Tests
  • HSP90 Heat-Shock Proteins
  • Fungi
  • Enzyme Inhibitors
  • Calcineurin
  • Antifungal Agents
  • 3214 Pharmacology and pharmaceutical sciences
  • 3202 Clinical sciences
  • 1115 Pharmacology and Pharmaceutical Sciences