3 Biotech

, 9:163 | Cite as

Quorum sensing inimical activity of Tribulus terrestris against gram negative bacterial pathogens by signalling interference

  • Kayeen VadakkanEmail author
  • S. Vijayanand
  • J. Hemapriya
  • Ramya Gunasekaran
Original Article


Bacterial virulence is controlled by a cascade of genes influenced by quorum sensing alias bacterial signalling.The present study was intended to develop an effective module that could constrain bacterial communication without harming the host. Quorum quenching ability of Tribulus terrestris was screened upon chromogenic reporter strains such as Chromobacterium violaceum, Serratia marcescens and Pseudomonas aeruginosa. Hydro-alcoholic extracts of root showed positive quorum quenching activity by effectively down regulating quorum sensing controlled mechanisms such as pigment production and biofilm formation. Lead component was purified and found to be ß-1, 5-O-dibenzoyl ribofuranose by GC–MS NIST and NMR spectrometry. Interestingly it was observed that the compound was neither bactericidal nor bacteriostatic but rather it’s only disturbing its interaction. Further studies revealed that the antagonist is not inhibiting the production of signalling molecule acyl homoserine lactone, instead inhibiting its action.


Acyl homoserine lactone ß-1 5-O-dibenzoyl ribofuranose Quorum sensing Quorum quenching Tribulus terrestris 



We would like to thank sophisticated instrumentation facility, VIT for the facilities provided for the completion of the research. We extend our gratitude to Yaazh Xenomics for their support. We would like to thank Ms. Famy Francis, Assistant Professor, Department of Chemistry, St. Mary’s College, Thrissur, Kerala for her timely help.

Compliance with ethical standards

Conflict of interest

We declare no conflict of interest.


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  1. 1.Bioresource Technology Lab, Department of BiotechnologyThiruvalluvar UniversityVelloreIndia
  2. 2.Department of MicrobiologyDKM College for WomenVelloreIndia

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