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Title: Novel Entries in a Fungal Biofilm Matrix Encyclopedia

Abstract

Virulence of Candida is linked with its ability to form biofilms. Once established, biofilm infections are nearly impossible to eradicate. Biofilm cells live immersed in a self-produced matrix, a blend of extracellular biopolymers, many of which are uncharacterized. In this study, we provide a comprehensive analysis of the matrix manufactured by Candida albicans both in vitro and in a clinical niche animal model. We further explore the function of matrix components, including the impact on drug resistance. We uncovered components from each of the macromolecular classes (55% protein, 25% carbohydrate, 15% lipid, and 5% nucleic acid) in the C. albicans biofilm matrix. Three individual polysaccharides were identified and were suggested to interact physically. Surprisingly, a previously identified polysaccharide of functional importance, β-1,3-glucan, comprised only a small portion of the total matrix carbohydrate. Newly described, more abundant polysaccharides included β-1,2 branched β-1,6-mannans (87%) associated with unbranched β-1,6-glucans (13%) in an apparent mannan-glucan complex (MGCx). Functional matrix proteomic analysis revealed 458 distinct activities. The matrix lipids consisted of neutral glycerolipids (89.1%), polar glycerolipids (10.4%), and sphingolipids (0.5%). Examination of matrix nucleic acid identified DNA, primarily noncoding sequences. Several of the in vitro matrix components, including proteins and each of the polysaccharides, weremore » also present in the matrix of a clinically relevant in vivo biofilm. Nuclear magnetic resonance (NMR) analysis demonstrated interaction of aggregate matrix with the antifungal fluconazole, consistent with a role in drug impedance and contribution of multiple matrix components.« less

Authors:
 [1];  [2];  [3];  [4];  [3];  [5];  [6];  [6];  [1];  [4];  [7];  [8];  [9];  [8]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Medicine. Infectious Diseases
  2. Univ. of Wisconsin, Madison, WI (United States). National Magnetic Resonance Facility at Madison
  3. Univ. of Wisconsin, Madison, WI (United States). Dept. of Biochemistry
  4. US Dept. of Agriculture (USDA), Madison, WI (United States). Dairy Forage Research Center
  5. Ernst Moritz Arndt Univ., Greifswald (Germany). Universitat Inst. for Microbiology; DECODON GmbH, Greifswald (Germany). BioTechnikum
  6. Université du Littoral Côte d’Opale, Calais (France). Unité de Chimie Environnementale at Interactions sur le Vivant
  7. Univ. of Wisconsin, Madison, WI (United States). Dept. of Biochemistry; Univ. of Wisconsin, Madison, WI (United States). Dept. of Food Sciences
  8. Univ. of Wisconsin, Madison, WI (United States). Dept. of Medicine. Infectious Diseases; Univ. of Wisconsin, Madison, WI (United States). Dept. of of Medical Microbiology and Immunology
  9. Carnegie Mellon Univ., Pittsburgh, PA (United States). Biological Sciences
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; National Institutes of Health (NIH); National Science Foundation (NSF)
OSTI Identifier:
1626131
Grant/Contract Number:  
R01 AI073289; P41RR005351; P41RR02301; P41GM10399; S10RR027000; DMB-8415048; OIA-9977486; BIR-9214394
Resource Type:
Accepted Manuscript
Journal Name:
mBio (Online)
Additional Journal Information:
Journal Name: mBio (Online); Journal Volume: 5; Journal Issue: 4; Journal ID: ISSN 2150-7511
Publisher:
American Society for Microbiology (ASM)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Microbiology

Citation Formats

Zarnowski, R., Westler, W. M., Lacmbouh, G. A., Marita, J. M., Bothe, J. R., Bernhardt, J., Lounes-Hadj Sahraoui, A., Fontaine, J., Sanchez, H., Hatfield, R. D., Ntambi, J. M., Nett, J. E., Mitchell, A. P., and Andes, D. R. Novel Entries in a Fungal Biofilm Matrix Encyclopedia. United States: N. p., 2014. Web. doi:10.1128/mbio.01333-14.
Zarnowski, R., Westler, W. M., Lacmbouh, G. A., Marita, J. M., Bothe, J. R., Bernhardt, J., Lounes-Hadj Sahraoui, A., Fontaine, J., Sanchez, H., Hatfield, R. D., Ntambi, J. M., Nett, J. E., Mitchell, A. P., & Andes, D. R. Novel Entries in a Fungal Biofilm Matrix Encyclopedia. United States. https://doi.org/10.1128/mbio.01333-14
Zarnowski, R., Westler, W. M., Lacmbouh, G. A., Marita, J. M., Bothe, J. R., Bernhardt, J., Lounes-Hadj Sahraoui, A., Fontaine, J., Sanchez, H., Hatfield, R. D., Ntambi, J. M., Nett, J. E., Mitchell, A. P., and Andes, D. R. Tue . "Novel Entries in a Fungal Biofilm Matrix Encyclopedia". United States. https://doi.org/10.1128/mbio.01333-14. https://www.osti.gov/servlets/purl/1626131.
@article{osti_1626131,
title = {Novel Entries in a Fungal Biofilm Matrix Encyclopedia},
author = {Zarnowski, R. and Westler, W. M. and Lacmbouh, G. A. and Marita, J. M. and Bothe, J. R. and Bernhardt, J. and Lounes-Hadj Sahraoui, A. and Fontaine, J. and Sanchez, H. and Hatfield, R. D. and Ntambi, J. M. and Nett, J. E. and Mitchell, A. P. and Andes, D. R.},
abstractNote = {Virulence of Candida is linked with its ability to form biofilms. Once established, biofilm infections are nearly impossible to eradicate. Biofilm cells live immersed in a self-produced matrix, a blend of extracellular biopolymers, many of which are uncharacterized. In this study, we provide a comprehensive analysis of the matrix manufactured by Candida albicans both in vitro and in a clinical niche animal model. We further explore the function of matrix components, including the impact on drug resistance. We uncovered components from each of the macromolecular classes (55% protein, 25% carbohydrate, 15% lipid, and 5% nucleic acid) in the C. albicans biofilm matrix. Three individual polysaccharides were identified and were suggested to interact physically. Surprisingly, a previously identified polysaccharide of functional importance, β-1,3-glucan, comprised only a small portion of the total matrix carbohydrate. Newly described, more abundant polysaccharides included β-1,2 branched β-1,6-mannans (87%) associated with unbranched β-1,6-glucans (13%) in an apparent mannan-glucan complex (MGCx). Functional matrix proteomic analysis revealed 458 distinct activities. The matrix lipids consisted of neutral glycerolipids (89.1%), polar glycerolipids (10.4%), and sphingolipids (0.5%). Examination of matrix nucleic acid identified DNA, primarily noncoding sequences. Several of the in vitro matrix components, including proteins and each of the polysaccharides, were also present in the matrix of a clinically relevant in vivo biofilm. Nuclear magnetic resonance (NMR) analysis demonstrated interaction of aggregate matrix with the antifungal fluconazole, consistent with a role in drug impedance and contribution of multiple matrix components.},
doi = {10.1128/mbio.01333-14},
journal = {mBio (Online)},
number = 4,
volume = 5,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 2014},
month = {Tue Jul 01 00:00:00 EDT 2014}
}

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