Cited by 334Antifungal resistance and susceptibilityFungal and yeast genetics researchBacterial biofilms and quorum sensing

The filamentation pathway controlled by the Efg1 regulator protein is required for normal biofilm formation and development in Candida albicans

Ramage, Gordon, VandeWalle, Kacy, López-Ribot, José L, Wickes, Brian L·2002·FEMS Microbiology Letters

Abstract

Candida albicans biofilms are structured microbial communities composed of a mixture of yeast cells and hyphal elements, suggesting a pivotal role for the dimorphic switch in the development of biofilms. We have used C. albicans mutants defective in genes involved in filamentation (Δcph1, Δefg1, Δhst7, and Δcst20) and compared these mutants to wild-type strains to determine whether filamentation is an integral factor for biofilm formation. Scanning electron microscopy revealed that Δcph1, Δhst7 and Δcst20 mutants were able to filament and form structured biofilms displaying three-dimensional architecture similar to those formed by wild-type strains. However, Δefg1 and Δcph1/Δefg1 mutants were unable to filament and did not form biofilms, but rather sparse monolayers of loosely attached elongated, rod-like, cells. Antimicrobial susceptibility testing showed intrinsic resistance of all mutant strains to fluconazole and amphotericin B when attached to the surface of biomaterials. These results suggest that hyphal formation is pivotal for biofilm development in C. albicans. However, the sessile lifestyle associated with adherent cells confers antifungal resistance, regardless of coherent biofilm formation.

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Crossref · 10.1111/j.1574-6968.2002.tb11330.x

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  • Hyphae are an important structural component of C. albicans biofilms; genes required for hyphal growth in suspension cultures are also necessary for proper biofilm formation.

    “Although they readily form in planktonic cultures, hyphae are an important structural component of C. albicans biofilms; thus, it is not surprising that genes required for hyphal growth in suspension cultures are also necessary for proper biofilm formation.”

    From <i>Candida albicans</i> Biofilms and Human Disease (2015) · cites this paper as [163]

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Authors
Ramage, G., VandeWalle, K., López-Ribot, J. L., & Wickes, B. L.
Affiliations
The University of Texas at San Antonio Health Science Center (US)
Corresponding author
Wickes, Brian L
Venue
FEMS Microbiology Letters
Published
2002-08
Volume
214
Issue
1
Pages
95-100
ISSN
  • 0378-1097 (ISSN-L)
  • 1574-6968
OpenAlex
W1981442035
Cited by
334
References
30
Citations by year
2026: 4 · 2025: 7 · 2024: 15 · 2023: 13 · 2022: 14 · 2021: 21 · 2020: 12 · 2019: 23 · 2018: 11 · 2017: 14 · 2016: 20 · 2015: 25 · 2014: 26 · 2013: 12 · 2012: 17
FWCI
5.08
Type
journal article
Language
en
Open access
closed
Locations
  • FEMS Microbiology Letters (publishedVersion)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
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 formation, hyphal development, antifungal resistance, fluconazole resistance, amphotericin B resistance, Cph1, yeast-to-hypha transition
MeSH terms
Amphotericin B, Antifungal Agents, Candida albicans, Culture Media, DNA-Binding Proteins, Fungal Proteins, Microbial Sensitivity Tests, Microscopy, Electron, Scanning, Transcription Factors, Fluconazole, Gene Expression Regulation, Fungal, Biofilms

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