Matrix polymers of Candida biofilms and their possible role in biofilm resistance to antifungal agents
Abstract
Extracellular polymeric material (EP), comprising the matrix of Candida albicans biofilms, was isolated and its composition was compared with that of EP obtained from culture supernatants of planktonically grown (suspended) organisms. Both preparations consisted of carbohydrate, protein, phosphorus and hexosamine, but biofilm EP contained significantly less total carbohydrate (41%) and protein (5%) than planktonic EP. It also had a higher proportion of glucose (16%) and contained galactose, suggesting that it might possess components unique to biofilms. To investigate whether the EP matrix plays a role in the resistance of biofilms to antifungal agents, susceptibility profiles of biofilms incubated statically (which have relatively little matrix) were compared with those for biofilms incubated with gentle shaking (which produce much more matrix material). Biofilms grown with or without shaking did not exhibit significant differences in susceptibility to any of the drugs tested, indicating that drug resistance is unrelated to the extent of matrix formation. However, biofilms formed on two different types of polyvinyl chloride catheter, obtained from different manufacturers, showed differences in susceptibility to amphotericin B, suggesting that drug resistance may arise as a result of highly specific, surface-induced gene expression.
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Secreted extracellular matrix contributes to biofilm drug resistance, both acting as a physical barrier to drug penetration and directly contributing to the overall structural integrity of the biofilm.
“Secreted extracellular matrix also contributes to biofilm drug resistance, both acting as a physical barrier to drug penetration and directly contributing to the overall structural integrity of the biofilm (2, 11, 130, 135).”
From <i>Candida albicans</i> Biofilms and Human Disease (2015) · cites this paper as [11]
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- Authors
- Baillie, G. S.
- Affiliations
- University of Glasgow (GB)
- Corresponding author
- Baillie, G. S.
- ORCID
- Baillie, G. S.
- Venue
- Journal of Antimicrobial Chemotherapy
- Publisher
- Oxford University Press (OUP)
- Published
- 2000-09-01
- Volume
- 46
- Issue
- 3
- Pages
- 397-403
- ISSN
- 0305-7453 (ISSN-L)
- 1460-2091
- OpenAlex
- W2112458089
- Cited by
- 389
- References
- 32
- Citations by year
- 2026: 3 · 2025: 6 · 2024: 3 · 2023: 7 · 2022: 11 · 2021: 11 · 2020: 14 · 2019: 13 · 2018: 17 · 2017: 18 · 2016: 23 · 2015: 19 · 2014: 34 · 2013: 18 · 2012: 29
- FWCI
- 3.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Antimicrobial Chemotherapy (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Heriot-Watt University
- Sir Jules Thorn Charitable Trust
- Topics
- Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
- Keywords
- Candida albicans, biofilm, biofilm matrix, antifungal resistance, amphotericin B, planktonic versus biofilm growth, glucose, galactose, polyvinyl chloride catheters, antifungal susceptibility
- MeSH terms
- Antifungal Agents, Candida albicans, Candidiasis, Dentures, Drug Resistance, Microbial, Humans, Microbial Sensitivity Tests, Polymers, Stomatitis, Biofilms
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