Dual action antifungal small molecule modulates multidrug efflux and TOR signaling.

Published

Journal Article

There is an urgent need for new strategies to treat invasive fungal infections, which are a leading cause of human mortality. Here, we establish two activities of the natural product beauvericin, which potentiates the activity of the most widely deployed class of antifungal against the leading human fungal pathogens, blocks the emergence of drug resistance, and renders antifungal-resistant pathogens responsive to treatment in mammalian infection models. Harnessing genome sequencing of beauvericin-resistant mutants, affinity purification of a biotinylated beauvericin analog, and biochemical and genetic assays reveals that beauvericin blocks multidrug efflux and inhibits the global regulator TORC1 kinase, thereby activating the protein kinase CK2 and inhibiting the molecular chaperone Hsp90. Substitutions in the multidrug transporter Pdr5 that enable beauvericin efflux impair antifungal efflux, thereby impeding resistance to the drug combination. Thus, dual targeting of multidrug efflux and TOR signaling provides a powerful, broadly effective therapeutic strategy for treating fungal infectious disease that evades resistance.

Full Text

Duke Authors

Cited Authors

  • Shekhar-Guturja, T; Gunaherath, GMKB; Wijeratne, EMK; Lambert, J-P; Averette, AF; Lee, SC; Kim, T; Bahn, Y-S; Tripodi, F; Ammar, R; Döhl, K; Niewola-Staszkowska, K; Schmitt, L; Loewith, RJ; Roth, FP; Sanglard, D; Andes, D; Nislow, C; Coccetti, P; Gingras, A-C; Heitman, J; Gunatilaka, AAL; Cowen, LE

Published Date

  • October 2016

Published In

Volume / Issue

  • 12 / 10

Start / End Page

  • 867 - 875

PubMed ID

  • 27571477

Pubmed Central ID

  • 27571477

Electronic International Standard Serial Number (EISSN)

  • 1552-4469

International Standard Serial Number (ISSN)

  • 1552-4450

Digital Object Identifier (DOI)

  • 10.1038/nchembio.2165

Language

  • eng