Macrophage Migration Is Impaired within Candida albicans Biofilms

Maria F. Alonso; Neil A. R. Gow; Lars P. Erwig; Judith M. Bain

doi:10.3390/jof3030031

Macrophage Migration Is Impaired within Candida albicans Biofilms

Maria F. Alonso, Neil A. R. Gow, Lars P. Erwig, Judith M. Bain

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Abstract

Candida albicans is an opportunistic fungal pathogen that infects immunocompromised patients. Infection control requires phagocytosis by innate immune cells, including macrophages. Migration towards, and subsequent recognition of, C. albicans fungal cell wall components by macrophages is critical for phagocytosis. Using live-cell imaging of phagocytosis, the macrophage cell line J774.1 showed enhanced movement in response to C. albicans cell wall mutants, particularly during the first 30 min, irrespective of the infection ratio. However, phagocyte migration was reduced up to 2-fold within a C. albicans biofilm compared to planktonic fungal cells. Biofilms formed from C. albicans glycosylation mutant cells also inhibited macrophage migration to a similar extent as wildtype Candida biofilms, suggesting that the physical structure of the biofilm, rather than polysaccharide matrix composition, may hamper phagocyte migration. These data illustrate differential macrophage migratory capacities, dependent upon the form of C. albicans encountered. Impaired migration of macrophages within a C. albicans biofilm may contribute to the recalcitrant nature of clinical infections in which biofilm formation occurs.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	Journal of Fungi
Volume	3
Issue number	3
Early online date	22 Jun 2017
DOIs	https://doi.org/10.3390/jof3030031
Publication status	Published - 22 Jun 2017

Bibliographical note

Acknowledgments:
We thank the Microscopy and Histology Core Facility at the University of Aberdeen. This work was funded by NHS Grampian Endowments (grant RG10191); the Wellcome Trust Strategic Award in Medical Mycology and Fungal Immunology (grant 097377); the Wellcome Trust Investigator award (grants 101873, 086827, 075470, & 200208) and the Medical Research Council Centre for Medical Mycology (grant MR/N006364/1).

Keywords

Candida
biofilm
macrophage
phagocytosis
migration
cell wall

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Macrophage Migration Is Impaired within Candida albicans Biofilms
© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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title = "Macrophage Migration Is Impaired within Candida albicans Biofilms",

abstract = "Candida albicans is an opportunistic fungal pathogen that infects immunocompromised patients. Infection control requires phagocytosis by innate immune cells, including macrophages. Migration towards, and subsequent recognition of, C. albicans fungal cell wall components by macrophages is critical for phagocytosis. Using live-cell imaging of phagocytosis, the macrophage cell line J774.1 showed enhanced movement in response to C. albicans cell wall mutants, particularly during the first 30 min, irrespective of the infection ratio. However, phagocyte migration was reduced up to 2-fold within a C. albicans biofilm compared to planktonic fungal cells. Biofilms formed from C. albicans glycosylation mutant cells also inhibited macrophage migration to a similar extent as wildtype Candida biofilms, suggesting that the physical structure of the biofilm, rather than polysaccharide matrix composition, may hamper phagocyte migration. These data illustrate differential macrophage migratory capacities, dependent upon the form of C. albicans encountered. Impaired migration of macrophages within a C. albicans biofilm may contribute to the recalcitrant nature of clinical infections in which biofilm formation occurs.",

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N1 - Acknowledgments: We thank the Microscopy and Histology Core Facility at the University of Aberdeen. This work was funded by NHS Grampian Endowments (grant RG10191); the Wellcome Trust Strategic Award in Medical Mycology and Fungal Immunology (grant 097377); the Wellcome Trust Investigator award (grants 101873, 086827, 075470, & 200208) and the Medical Research Council Centre for Medical Mycology (grant MR/N006364/1).

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N2 - Candida albicans is an opportunistic fungal pathogen that infects immunocompromised patients. Infection control requires phagocytosis by innate immune cells, including macrophages. Migration towards, and subsequent recognition of, C. albicans fungal cell wall components by macrophages is critical for phagocytosis. Using live-cell imaging of phagocytosis, the macrophage cell line J774.1 showed enhanced movement in response to C. albicans cell wall mutants, particularly during the first 30 min, irrespective of the infection ratio. However, phagocyte migration was reduced up to 2-fold within a C. albicans biofilm compared to planktonic fungal cells. Biofilms formed from C. albicans glycosylation mutant cells also inhibited macrophage migration to a similar extent as wildtype Candida biofilms, suggesting that the physical structure of the biofilm, rather than polysaccharide matrix composition, may hamper phagocyte migration. These data illustrate differential macrophage migratory capacities, dependent upon the form of C. albicans encountered. Impaired migration of macrophages within a C. albicans biofilm may contribute to the recalcitrant nature of clinical infections in which biofilm formation occurs.

AB - Candida albicans is an opportunistic fungal pathogen that infects immunocompromised patients. Infection control requires phagocytosis by innate immune cells, including macrophages. Migration towards, and subsequent recognition of, C. albicans fungal cell wall components by macrophages is critical for phagocytosis. Using live-cell imaging of phagocytosis, the macrophage cell line J774.1 showed enhanced movement in response to C. albicans cell wall mutants, particularly during the first 30 min, irrespective of the infection ratio. However, phagocyte migration was reduced up to 2-fold within a C. albicans biofilm compared to planktonic fungal cells. Biofilms formed from C. albicans glycosylation mutant cells also inhibited macrophage migration to a similar extent as wildtype Candida biofilms, suggesting that the physical structure of the biofilm, rather than polysaccharide matrix composition, may hamper phagocyte migration. These data illustrate differential macrophage migratory capacities, dependent upon the form of C. albicans encountered. Impaired migration of macrophages within a C. albicans biofilm may contribute to the recalcitrant nature of clinical infections in which biofilm formation occurs.

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JO - Journal of Fungi

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Macrophage Migration Is Impaired within Candida albicans Biofilms

Abstract

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Keywords

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