Phytocompound Mediated Blockage of Quorum Sensing Cascade in ESKAPE Pathogens
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Published on: August 8, 2025
Sreejita Ghosh1, Dibyajit Lahiri2, Moupriya Nag2
1Department of Biotechnology, Maulana Abul Kalam Azad University of Technology, Haringhata 741249, West Bengal, India.
Abstract:
Increased resistance of Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter sp. (ESKAPE) pathogens against various drugs has enhanced the urge for the development of alternate therapeutics. Quorum sensing (QS) is a density dependent cell-to-cell communication mechanism responsible for controlling pathogenicity with the regulation of gene expression. Thus, QS is considered a potential target for the development of newer anti-biofilm agents that do not depend on the utilization of antibiotics. Compounds with anti-QS effects are known as QS inhibitors (QSIs), and they can inhibit the QS mechanism that forms the major form in the development of bacterial pathogenesis. A diverse array of natural compounds provides a plethora of anti-QS effects. Over recent years, these natural compounds have gained importance as new strategies for combating the ESKAPE pathogens and inhibiting the genes involved in QS. Different pharmacognostical and pharmacological studies have been carried out so far for identification of novel drugs or for the discovery of their unique structures that may help in developing more effective anti-biofilm therapies. The main objective of this review is to discuss the various natural compounds, so far identified and their employed mechanisms in hindering the genes responsible for QS leading to bacterial pathogenesis.
Insights
Natural compounds can inhibit quorum sensing (QS) in ESKAPE pathogens, offering new anti-biofilm strategies. These QS inhibitors (QSIs) combat drug-resistant bacteria without traditional antibiotics.
Area of Science:
- Microbiology
- Pharmacology
- Natural Products Chemistry
Background:
- Rising antimicrobial resistance in ESKAPE pathogens necessitates novel therapeutic approaches.
- Quorum sensing (QS) is a critical bacterial communication system regulating virulence and biofilm formation.
- QS inhibitors (QSIs) offer a promising antibiotic-alternative strategy by disrupting bacterial pathogenicity.
Purpose of the Study:
- To review natural compounds with anti-quorum sensing (anti-QS) activity.
- To explore the mechanisms by which these natural compounds inhibit QS in ESKAPE pathogens.
- To highlight the potential of natural QSIs in developing new anti-biofilm therapies.
Main Methods:
- Literature review of pharmacognostical and pharmacological studies.
- Analysis of identified natural compounds and their anti-QS mechanisms.
- Focus on compounds targeting QS-regulated genes in ESKAPE pathogens.
Main Results:
- A diverse range of natural compounds exhibit significant anti-QS effects.
- These compounds effectively inhibit QS mechanisms crucial for bacterial pathogenesis.
- Natural QSIs demonstrate potential in combating ESKAPE pathogens and preventing biofilm formation.
Conclusions:
- Natural compounds represent a valuable resource for developing novel anti-QS agents.
- Targeting QS with natural QSIs is a viable strategy to combat drug-resistant ESKAPE pathogens.
- Further research into natural compound structures can lead to more effective anti-biofilm therapies.
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