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Front Immunol. 2018 Jan 10;8:1968. doi: 10.3389/fimmu.2017.01968. eCollection 2017.

The Interface between Fungal Biofilms and Innate Immunity.

Author information

1
Department of Medicine, University of Wisconsin, Madison, WI, United States.
2
Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada.
3
Department of Medicine, McGill University, Montreal, QC, Canada.
4
Department of Medical Microbiology and Immunology, University of Wisconsin, Madison, WI, United States.

Abstract

Fungal biofilms are communities of adherent cells surrounded by an extracellular matrix. These biofilms are commonly found during infection caused by a variety of fungal pathogens. Clinically, biofilm infections can be extremely difficult to eradicate due to their resistance to antifungals and host defenses. Biofilm formation can protect fungal pathogens from many aspects of the innate immune system, including killing by neutrophils and monocytes. Altered immune recognition during this phase of growth is also evident by changes in the cytokine profiles of monocytes and macrophages exposed to biofilm. In this manuscript, we review the host response to fungal biofilms, focusing on how these structures are recognized by the innate immune system. Biofilms formed by Candida, Aspergillus, and Cryptococcus have received the most attention and are highlighted. We describe common themes involved in the resilience of fungal biofilms to host immunity and give examples of biofilm defenses that are pathogen-specific.

KEYWORDS:

Aspergillus; Candida; biofilm; fungi; innate immunity; matrix; neutrophil; neutrophil extracellular trap

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