Related Experiment Video

Updated: Mar 18, 2026

Microtiter Dish Biofilm Formation Assay
03:57

Microtiter Dish Biofilm Formation Assay

Published on: January 30, 2011

116.1K

Glycerol metabolism promotes biofilm formation by Pseudomonas aeruginosa

Jessica Scoffield1, Laura Silo-Suh2

  • 1a Department of Pediatric Dentistry, 1919 7th Avenue South, Room SDB 801, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.

Canadian Journal of Microbiology
|July 9, 2016
PubMed

Insights

Glycerol metabolism aids Pseudomonas aeruginosa biofilm formation in cystic fibrosis (CF) lungs. Disrupting glycerol metabolism regulation enhances biofilm, suggesting a key role in CF persistent infections.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Biochemistry

Background:

  • Pseudomonas aeruginosa establishes persistent airway infections in cystic fibrosis (CF) patients.
  • Host-derived nutrients, like phosphotidylcholine, are available in CF sputum and can be metabolized by P. aeruginosa.
  • Metabolism of phosphotidylcholine by P. aeruginosa increases glycerol availability in the CF lung.

Purpose of the Study:

  • To investigate the role of glycerol metabolism in Pseudomonas aeruginosa biofilm formation.
  • To understand how glycerol utilization impacts bacterial persistence in the context of CF lung infections.

Main Methods:

  • Comparative analysis of biofilm formation in P. aeruginosa isolates (FRD1 and PAO1) with and without glycerol.
  • Genetic manipulation to study the effect of the GlpR regulator on glycerol metabolism and biofilm formation.
  • Assessment of Pel polysaccharide expression in relation to GlpR regulation and biofilm development.

Main Results:

  • Glycerol metabolism was found to promote biofilm formation in both a chronic CF isolate (FRD1) and a wound isolate (PAO1) of P. aeruginosa.
  • Deletion of the GlpR regulator, which normally represses glycerol metabolism genes, led to enhanced biofilm formation in the FRD1 isolate.
  • Enhanced biofilm formation in the GlpR mutant was associated with increased expression of the Pel polysaccharide.

Conclusions:

  • Glycerol metabolism is a significant factor promoting Pseudomonas aeruginosa biofilm formation.
  • The GlpR regulator plays a role in controlling glycerol metabolism and its impact on biofilm.
  • Glycerol metabolism and subsequent biofilm formation may contribute to the persistence of P. aeruginosa in cystic fibrosis airways.
Keywords:
Pseudomonas aeruginosabiofilmsglycerolglycérol

More Related Videos

Methodologies for Studying B. subtilis Biofilms as a Model for Characterizing Small Molecule Biofilm Inhibitors10:17

Methodologies for Studying B. subtilis Biofilms as a Model for Characterizing Small Molecule Biofilm Inhibitors

Published on: October 9, 2016

16.4K
Bile Salt-induced Biofilm Formation in Enteric Pathogens: Techniques for Identification and Quantification10:05

Bile Salt-induced Biofilm Formation in Enteric Pathogens: Techniques for Identification and Quantification

Published on: May 6, 2018

13.4K

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...
1.8K
Lipid Catabolism01:25

Lipid Catabolism

Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
1.3K
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,...
845
Biosynthesis of Lipids01:29

Biosynthesis of Lipids

Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
826
Formation of Lipopolysaccharides01:19

Formation of Lipopolysaccharides

Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin,...
892
Other Glycolytic Pathways01:24

Other Glycolytic Pathways

The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
1.1K