Cited by 170Antifungal resistance and susceptibilityFungal and yeast genetics researchBacterial biofilms and quorum sensing

Interface of Candida albicans Biofilm Matrix-Associated Drug Resistance and Cell Wall Integrity Regulation

Open access
Nett, Jeniel E., Sanchez, Hiram, Cain, Michael T., Ross, Kelly M., Andes, David R.·2011·Eukaryotic Cell

Abstract

Candida albicans frequently infects medical devices by growing as a biofilm, i.e., a community of adherent organisms entrenched in an extracellular matrix. During biofilm growth, Candida spp. acquire the ability to resist high concentrations of antifungal drugs. One recently recognized biofilm resistance mechanism involves drug sequestration by matrix β-1,3 glucan. Using a candidate gene approach, we investigated potential C. albicans β-1,3-glucan regulators, based on their homology to Saccharomyces cerevisiae , including SMI1 and protein kinase C (PKC) pathway components. We identified a role for the SMI1 in biofilm matrix glucan production and development of the associated drug resistance phenotype. This pathway appears to act through transcription factor Rlmp and glucan synthase Fks1p. The phenotypes of these mutant biofilms mimicked those of the smi1 Δ/ smi1 Δ biofilm, and overexpression of FKS1 in the smi1 Δ/ smi1 Δ mutant restored the biofilm resistant phenotype. However, control of this pathway is distinct from that of the upstream PKC pathway because the pkc1 Δ/ pkc1 Δ, bck1 Δ/ bck1 Δ, mkk2 Δ/ mkk2 Δ, and mkc1 Δ/ mkc1 Δ biofilms retained the resistant phenotype of the parent strain. In addition, resistance to cell-perturbing agents and gene expression data do not support a significant role for the cell wall integrity pathway during the biofilm formation. Here we show that Smi1p functions in conjunction with Rlm1p and Fks1p to produce drug-sequestering biofilm β-glucan. Our work provides new insight into how the C. albicans biofilm matrix production and drug resistance pathways intersect with the planktonic cell wall integrity pathway. This novel connection helps explain how pathogens in a multicellular biofilm community are protected from anti-infective therapy.

Integrity signals

Registry

Crossref · 10.1128/ec.05126-11

Cites

54 of 54 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Two known transcriptional regulators of biofilm matrix production in C. albicans are Rlm1 and Zap1.

    “Two known transcriptional regulators of biofilm matrix production in C. albicans are Rlm1 and Zap1.”

    From <i>Candida albicans</i> Biofilms and Human Disease (2015) · cites this paper as [136]

  • Deletion of RLM1 causes a reduction in matrix levels.

    “Deletion of RLM1 causes a reduction in matrix levels (136), whereas deletion of ZAP1 leads to an increase in the accumulation of extracellular matrix material, probably by upregulating the glucoamylases Gca1 and Gca2 (144).”

    From <i>Candida albicans</i> Biofilms and Human Disease (2015) · cites this paper as [136]

  • The transcriptional regulator Rlm1 contributes to antifungal drug resistance by regulating the expression of FKS1.

    “The transcriptional regulator Rlm1 (discussed above) contributes to antifungal drug resistance by regulating the expression of FKS1 (136).”

    From <i>Candida albicans</i> Biofilms and Human Disease (2015) · cites this paper as [136]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Nett, J. E., Sanchez, H., Cain, M. T., Ross, K. M., & Andes, D. R.
Affiliations
  • University of Wisconsin–Madison (US)
  • Department of Medicine, University of Wisconsin, Madison, Wisconsin
Corresponding author
Andes, David R.
Venue
Eukaryotic Cell
Published
2011-12
Volume
10
Issue
12
Pages
1660-1669
ISSN
  • 1535-9778 (ISSN-L)
  • 1535-9786
OpenAlex
W2138246367
Cited by
168
References
54
Citations by year
2026: 6 · 2025: 6 · 2024: 10 · 2023: 8 · 2022: 13 · 2021: 12 · 2020: 16 · 2019: 8 · 2018: 13 · 2017: 12 · 2016: 17 · 2015: 12 · 2014: 9 · 2013: 17 · 2012: 7
FWCI
7.33
Type
journal article
Language
en
Open access
Locations
  • Eukaryotic Cell (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (T32HL007899)
  • National Institute of Allergy and Infectious Diseases (R01AI073289)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
Keywords
Candida albicans, biofilm, antifungal resistance, β-1,3-glucan, extracellular matrix, glucan synthase, protein kinase C pathway, cell wall integrity pathway, drug sequestration, medical device infections, biofilm formation
MeSH terms
Animals, Antifungal Agents, Candida albicans, Candidiasis, Cell Wall, Fungal Proteins, Glucosyltransferases, Protein Kinase C, Virulence, Fluconazole, Gene Expression Regulation, Fungal, Biofilms, Drug Resistance, Fungal, beta-Glucans, Mice, Rats, Gene Knockout Techniques, Catheters

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review