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Updated: Feb 23, 2026
Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa
Published on: June 30, 2016
Genetic Tools to Study c-di-GMP-Dependent Signaling in Pseudomonas aeruginosa
Livia Leoni1, Sarika Vishnu Pawar2, Giordano Rampioni3
1Department of Science, University Roma Tre, Viale Guglielmo Marconi 446, 00146, Rome, Italy. livia.leoni@uniroma3.it.
Abstract:
Pseudomonas aeruginosa infections are often difficult or impossible to treat, mainly due to its ability to form antibiotic-resistant biofilms. Since c-di-GMP signaling strongly influences P. aeruginosa biofilm development and sensitivity to antibiotics, it is considered a promising target for the development of anti-biofilm drugs and it is under intensive investigation. However, studying c-di-GMP signaling in P. aeruginosa is challenging, mainly due to (1) the multiplicity of enzymes involved in c-di-GMP metabolism, (2) the difficulty to extract and measure c-di-GMP intracellular levels by chemical methods, and (3) the lack of genetic tools specifically dedicated to this purpose.Here, a bioluminescence-based reporter system convenient for studying cellular processes or compounds expected to cause an increase or a decrease in intracellular c-di-GMP levels produced by P. aeruginosa cultures is described. Bioluminescence is particularly appropriate in P. aeruginosa research, due to the high intensity of the signal and total lack of background noise. In addition, the use of genetic cassettes allowing the fine control of P. aeruginosa c-di-GMP intracellular levels via arabinose induction is described.Overall, the genetic tools described here could facilitate investigations tackling the c-di-GMP signaling process on different fields, from cellular physiology to drug-discovery research.
Insights
Researchers developed a new bioluminescence system to study cyclic di-GMP (c-di-GMP) signaling in Pseudomonas aeruginosa. This tool helps overcome challenges in analyzing c-di-GMP, aiding the development of new anti-biofilm drugs.
Area of Science:
- Microbiology
- Molecular Biology
- Drug Discovery
Background:
- Pseudomonas aeruginosa forms antibiotic-resistant biofilms, complicating infection treatment.
- Cyclic di-GMP (c-di-GMP) signaling is crucial for biofilm formation and antibiotic resistance in P. aeruginosa.
- Studying c-di-GMP in P. aeruginosa is difficult due to enzyme complexity, measurement challenges, and lack of specific genetic tools.
Purpose of the Study:
- To develop novel genetic tools for studying c-di-GMP signaling in P. aeruginosa.
- To create a bioluminescence-based reporter system for monitoring intracellular c-di-GMP levels.
- To facilitate research on c-di-GMP related cellular processes and anti-biofilm drug discovery.
Main Methods:
- Development of a bioluminescence reporter system for P. aeruginosa.
- Utilized genetic cassettes for arabinose-inducible control of c-di-GMP levels.
- Employed high-intensity bioluminescence for sensitive signal detection with no background noise.
Main Results:
- A functional bioluminescence-based reporter system for P. aeruginosa c-di-GMP signaling was established.
- Genetic tools enabling fine control over intracellular c-di-GMP levels via arabinose induction were created.
- The system demonstrated high signal intensity and lack of background noise, suitable for P. aeruginosa research.
Conclusions:
- The described genetic tools simplify the investigation of c-di-GMP signaling in P. aeruginosa.
- These tools can advance research in cellular physiology and accelerate the discovery of anti-biofilm therapies.
- This work provides a valuable platform for understanding and targeting P. aeruginosa pathogenesis.
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