Related Experiment Video

Updated: Jun 21, 2026

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
07:47

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases

Published on: January 1, 2016

[Biofilm caused by fungi--structure, quorum sensing, morphogenetic changes, resistance to drugs]

Magdalena Nowak1, Piotr Kurnatowski

  • 1Katedra Biologii i Genetyki Medycznej, Uniwersytet Medyczny, Plac J. Hallera 1, 90-647 Łódź.

Wiadomosci Parazytologiczne
|July 8, 2009
PubMed

Insights

Candida fungal biofilms on medical implants cause serious infections and are resistant to antifungal drugs. Some anti-inflammatory drugs may inhibit biofilm formation, offering potential new treatment avenues.

Area of Science:

  • Medical Mycology
  • Biomedical Engineering
  • Infectious Diseases

Background:

  • Fungal biofilms on biomedical prosthesis present significant clinical challenges, leading to material dysfunction and persistent infections.
  • Candida species exhibit varying biofilm structures and quantities, impacting treatment efficacy.
  • Biofilm formation involves fungal adhesion, microcolony development, and extracellular matrix production, contributing to drug resistance.

Purpose of the Study:

  • To investigate the characteristics of fungal biofilm formation in Candida species.
  • To understand the role of quorum-sensing molecules (farnesol and tyrosol) in biofilm development and pathogenicity.
  • To explore potential strategies for inhibiting biofilm formation and overcoming antifungal drug resistance.

Main Methods:

  • In vitro examination of Candida biofilm formation stages.
  • Analysis of extracellular matrix composition and its role in resistance.
  • Investigation of quorum-sensing molecule effects on fungal morphology and biofilm development.
  • In vitro testing of antifungal drug activity against planktonic cells versus biofilms.
  • Screening of non-steroidal anti-inflammatory drugs for biofilm inhibition.

Main Results:

  • Biofilm formation progresses through distinct stages: adhesion, microcolony formation, and matrix excretion.
  • Quorum-sensing molecules farnesol and tyrosol inversely regulate morphogenetic transitions crucial for pathogenicity.
  • Candida biofilms demonstrate significantly higher resistance to antifungal drugs compared to planktonic cells.
  • Certain non-steroidal anti-inflammatory drugs exhibit inhibitory effects on Candida biofilm formation.

Conclusions:

  • Fungal biofilms on medical implants are a major clinical concern due to drug resistance and infection potential.
  • Understanding biofilm development and quorum sensing is key to developing novel therapeutic strategies.
  • Non-steroidal anti-inflammatory drugs represent a promising, unexplored avenue for combating Candida biofilm infections.

More Related Videos

A Platform of Anti-biofilm Assays Suited to the Exploration of Natural Compound Libraries09:39

A Platform of Anti-biofilm Assays Suited to the Exploration of Natural Compound Libraries

Published on: December 27, 2016

Development of a Polymicrobial Colony Biofilm Model to Test Antimicrobials in Cystic Fibrosis07:16

Development of a Polymicrobial Colony Biofilm Model to Test Antimicrobials in Cystic Fibrosis

Published on: September 20, 2024

Related Concept Videos

Biofilms01:29

Biofilms

Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
Bacterial Signaling01:30

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
Antifungal Agents01:15

Antifungal Agents

Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...
Biodeterioration01:28

Biodeterioration

Biodeterioration refers to the unwanted alteration of materials caused by microorganisms—especially fungi—which damage both organic substrates (paper, wood, textiles) and inorganic ones (stone, plaster, glass). Unlike abiotic decay, biodeterioration results from biological activity that produces physical disruption and chemical degradation.Physical deterioration occurs as fungal hyphae penetrate pores, cracks, and surface irregularities. Hyphal turgor pressure, thigmotropic growth along...