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Volume 147, Issue 12

-Acylhomoserine-lactone-mediated communication between and in mixed biofilms Free

Abstract

and are capable of forming mixed biofilms in the lungs of cystic fibrosis patients. Both bacteria employ quorum-sensing systems, which rely on -acylhomoserine lactone (AHL) signal molecules, to co-ordinate expression of virulence factors with the formation of biofilms. As both bacteria utilize the same class of signal molecules the authors investigated whether communication between the species occurs. To address this issue, novel Gfp-based biosensors for non-destructive, detection of AHLs were constructed and characterized. These sensors were used to visualize AHL-mediated communication in mixed biofilms, which were cultivated either in artificial flow chambers or in alginate beads in mouse lung tissue. In both model systems was capable of perceiving the AHL signals produced by , while the latter strain did not respond to the molecules produced by . Measurements of extracellular proteolytic activities of defined quorum-sensing mutants grown in media complemented with AHL extracts prepared from culture supernatants of various wild-type and mutant strains supported the view of unidirectional signalling between the two strains.

  • Received:
  • Accepted:
  • Revised:
  • Published Online:
Keyword(s): 3-oxo-C10, 3-oxo-C12 and 3-oxo-C14-HSL, N-(3-oxodecanoyl)-, N-(3-oxododecanoyl)- and N-(3-oxotetradecanoyl)-L-homoserine lactone , AHL, N-acylhomoserine lactone , C4-, C6-, C8-, C10- and C-12-HSL, N-butanoyl, N-hexanoyl-, N-octanoyl, N-decanoyl- and N-dodecanoyl-L-homoserine lactone , CF, cystic fibrosis , cross-talk , CSLM, confocal scanning laser microscopy , cystic fibrosis , DsRed, red fluorescent protein , Gfp, green fluorescent protein , intergeneric communication , QS, quorum sensing and quorum sensing
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2001-12-01
2024-04-19
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N-Acylhomoserine-lactone-mediated communication between Pseudomonas aeruginosa and Burkholderia cepacia in mixed biofilms
Microbiology 147, 3249 (2001); https://doi.org/10.1099/00221287-147-12-3249
/content/journal/micro/10.1099/00221287-147-12-3249
/content/journal/micro/10.1099/00221287-147-12-3249
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