Colleen T. O’Loughlin, Laura C. Miller, Albert Siryaporn, Knut Drescher, Martin F. Semmelhack, and Bonnie L. Bassler (2013) 110:17981–17986, doi:10.1073/pnas.1316981110
A quorum-sensing inhibitor blocks Pseudomonas aeruginosa virulence and biofilm formation
Quorum sensing is a way a bacterium communicates to the cells around it to regulate behavior of the community as a whole. This process occurs in harmless bacteria as well as pathogens. One such pathogen, Pseudomonas aeruginosa, uses quorum sensing to attack its host in a concerted effort by all the cells present and to control how the cells ‘stick’ together once infecting the host. In an effort to prevent P. aeruginosa attack and infection, researchers tested synthetic molecules to identify those which block cells from receiving the attack message. One such molecule, meta-bromo-thiolactone (mBTL), succeeded in blocking the message and protected a roundworm model system and human lung cells from dying due to infection. The paper also discusses how mBTL works at the molecular level. The results from this study could help control complications in cystic fibrosis and hospital infections due to contaminated equipment.