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Global analysis of fungal morphology exposes mechanisms of host cell escape

Author

Listed:
  • Teresa R. O’Meara

    (University of Toronto)

  • Amanda O. Veri

    (University of Toronto)

  • Troy Ketela

    (University of Toronto)

  • Bo Jiang

    (Bioprocess Technology & Expression, Merck Research Laboratories)

  • Terry Roemer

    (Merck Research Laboratories)

  • Leah E. Cowen

    (University of Toronto)

Abstract

Developmental transitions between single-cell yeast and multicellular filaments underpin virulence of diverse fungal pathogens. For the leading human fungal pathogen Candida albicans, filamentation is thought to be required for immune cell escape via induction of an inflammatory programmed cell death. Here we perform a genome-scale analysis of C. albicans morphogenesis and identify 102 negative morphogenetic regulators and 872 positive regulators, highlighting key roles for ergosterol biosynthesis and N-linked glycosylation. We demonstrate that C. albicans filamentation is not required for escape from host immune cells; instead, macrophage pyroptosis is driven by fungal cell-wall remodelling and exposure of glycosylated proteins in response to the macrophage phagosome. The capacity of killed, previously phagocytized cells to drive macrophage lysis is also observed with the distantly related fungal pathogen Cryptococcus neoformans. This study provides a global view of morphogenetic circuitry governing a key virulence trait, and illuminates a new mechanism by which fungi trigger host cell death.

Suggested Citation

  • Teresa R. O’Meara & Amanda O. Veri & Troy Ketela & Bo Jiang & Terry Roemer & Leah E. Cowen, 2015. "Global analysis of fungal morphology exposes mechanisms of host cell escape," Nature Communications, Nature, vol. 6(1), pages 1-10, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7741
    DOI: 10.1038/ncomms7741
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    Cited by:

    1. Nicole M. Revie & Kali R. Iyer & Michelle E. Maxson & Jiabao Zhang & Su Yan & Caroline M. Fernandes & Kirsten J. Meyer & Xuefei Chen & Iwona Skulska & Meea Fogal & Hiram Sanchez & Saif Hossain & Sheen, 2022. "Targeting fungal membrane homeostasis with imidazopyrazoindoles impairs azole resistance and biofilm formation," Nature Communications, Nature, vol. 13(1), pages 1-20, December.

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