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Phytochemical Quorum-Sensing Inhibitors Against Bacterial Pathogens: Mechanisms of Action and Translational
1Department of Life Sciences, School of Life and Health Sciences, University of Nicosia, Nicosia 2417, Cyprus.
Current Issues in Molecular Biology
|February 27, 2026
Summary
Phytochemicals can disrupt bacterial communication (quorum sensing) to fight infections without killing bacteria. However, challenges like microbiome impact and inconsistent research methods hinder their clinical use.
Area of Science:
- Microbiology
- Pharmacology
- Natural Products Chemistry
Background:
- Antimicrobial resistance (AMR) is a major global health threat, intensified by antibiotic overuse.
- Quorum sensing (QS), a bacterial communication system, regulates virulence and biofilm formation, making it a promising anti-virulence target.
- Phytochemicals show potential to inhibit QS pathways at sub-inhibitory concentrations.
Purpose of the Study:
- To critically examine phytochemical modulation of bacterial QS mechanisms.
- To synthesize evidence on phytochemical QS inhibitors against pathogens.
- To evaluate translational challenges for phytochemical QS inhibitors.
Main Methods:
- Literature review and critical analysis of existing research.
- Examination of molecular mechanisms of phytochemical QS inhibition.
- Synthesis of experimental evidence focusing on pathogens.
- Evaluation of translational barriers including microbiome effects and methodological limitations.
Main Results:
- Phytochemicals modulate key QS signaling pathways (AHL, AIP, AI-2).
- QS inhibition by phytochemicals can attenuate virulence without direct bacterial killing.
- Significant translational challenges exist, including potential microbiome disruption and methodological inconsistencies.
Conclusions:
- Phytochemical QS inhibitors offer a promising anti-virulence strategy but face hurdles.
- Addressing methodological heterogeneity and microbiome impact is crucial for clinical translation.
- Mechanism-resolved studies and standardized testing are needed to advance phytochemical QS inhibitors.
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