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Related Concept Videos

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,...
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...
Inhibitors of Bacterial DNA Synthesis01:28

Inhibitors of Bacterial DNA Synthesis

Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These antibiotics are selectively...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...

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Related Experiment Video

Updated: Jun 20, 2026

Synthesis and Assay of Vibrio Quorum Sensing Inhibitors
03:29

Synthesis and Assay of Vibrio Quorum Sensing Inhibitors

Published on: May 31, 2024

Quorum sensing inhibitors: a patent overview.

Jiachuan Pan1, Dacheng Ren

  • 1Department of Biomedical & Chemical Engineering, Syracuse Biomaterials Institute, Syracuse University, 121 Link Hall, Syracuse, NY 13244, USA.

Expert Opinion on Therapeutic Patents
|September 8, 2009
PubMed
Summary

Quorum sensing (QS) inhibitors offer novel therapeutic strategies by disrupting microbial communication. These agents, including small molecules, peptides, and proteins, target QS pathways to combat infections.

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Area of Science:

  • Microbiology
  • Biochemistry
  • Pharmacology

Background:

  • Quorum sensing (QS) is a cell-cell communication system regulating microbial gene expression based on population density.
  • QS influences critical phenotypes such as virulence and biofilm formation.
  • Inhibiting QS presents a potential therapeutic avenue for managing microbial infections.

Purpose of the Study:

  • To review quorum sensing inhibitors and their therapeutic applications.
  • To categorize identified QS inhibitors based on their chemical nature and mechanism of action.

Main Methods:

  • A systematic search of patent databases was conducted.
  • Patents related to quorum sensing inhibition filed between 1999 and 2008 were analyzed.

Main Results:

  • Numerous QS inhibitors, comprising natural and synthetic compounds, were identified.
  • Inhibitors were broadly classified into nonpeptide small molecules, peptides, and proteins.
  • Mechanisms of inhibition include signal generation repression, receptor blockade, and signal disruption.

Conclusions:

  • Quorum sensing inhibitors represent a promising alternative to traditional antimicrobial therapies.
  • These inhibitors offer a strategy to control microbial pathogenesis by interfering with QS pathways.
  • The diverse classes of QS inhibitors provide multiple targets for therapeutic intervention.