Quorum sensing inhibitors from Leucetta chagosensis Dendy, 1863
|Author(s)||Mai T.1, 2, Tintillier Florent1, Lucasson Aude3, Moriou C.2, Bonno E.1, Petek S.1, Magre Kevin3, Al Mourabit A.2, Saulnier Denis3, Debitus C.1|
|Affiliation(s)||1 : IRD, EIO UMR241, Papeete, Tahiti, Fr Polynesia.
2 : Ctr Rech Gif Sur Yvette, Inst Chim Subst Nat, CNRS, Gif Sur Yvette, France.
3 : IFREMER, EIO UMR241, LABEX CORAIL, Taravao 98719, Tahiti, Fr Polynesia.
|Source||Letters In Applied Microbiology (0266-8254) (Wiley-blackwell), 2015-10 , Vol. 61 , N. 4 , P. 311-317|
|WOS© Times Cited||16|
|Keyword(s)||biofouling, Leucetta chagosensis, leucettamine, naamidine, naamine, quorum sensing, quorum sensing inhibitors, sponges, Vibrio harveyi|
|Abstract||Sponges are a rich source for investigation of bioactive small molecules. They have been mostly investigated for the search of new pharmacological models or therapeutic agents for the treatment of human diseases. Micro-organisms can also represent a virulent pathogen for marine invertebrates such as sponges, which need to protect themselves against these microbes. Sponges' self defence mechanisms involving dialogue molecules thus represent a pertinent research track for potent anti-infective and anti-biofilm activities such as quorum sensing inhibitors (QSIs). The investigation of the QSI crude extract of Leucetta chagosensis Dendy, 1863 led to the isolation of three new alkaloids, isonaamine D, di-isonaamidine A and leucettamine D, along with the known isonaamine A and isonaamidine A. Isonaamidine A and isonaamine D were identified as inhibitors of the three quorum sensing pathways of Vibrio harveyi (CAI-1, AI-2 and harveyi auto inducer), but isonaamidine A displayed the strongest activity on AI-2 biosensor. Both compounds are new examples of natural QSIs of V. harveyi. These results outline the importance of these secondary metabolites for their producing organisms themselves in their natural environment, as well as the potential of the marine resource for aquaculture needs.|