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  • Title: Detection of possible AI-2-mediated quorum sensing system in commensal intestinal bacteria.
    Author: Lukás F, Gorenc G, Kopecný J.
    Journal: Folia Microbiol (Praha); 2008; 53(3):221-4. PubMed ID: 18661296.
    Abstract:
    The Vibrio harveyi strain BB170-autoinducer bioassay was used to detect possible quorum sensing autoinducer-2 molecule (AI-2) in culture fluids of commensal intestinal bacteria. Culture fluids of Bacteroides vulgatus, Clostridium proteoclasticum, Escherichia coli, Eubacterium rectale, Lachnospira multipara, Pseudobutyrivibrio ruminis, Roseburia intestinalis, Ruminococcus albus and Ruminococcus flavefaciens contained AI-2-like molecules. The PCR bands from some of the tested strains could be also amplified using primers designed for the luxS gene. These findings suggest that AI-2 is present in the gastrointestinal tract; however, it has not yet been proved whether it is used for bacterial cell-to-cell communication.
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