quorum

Quorum Sensing-IN-3 (QS-IN-1) is a compound with inhibitory effects on bacterial community sensing, which inhibits the exchange of information between bacteria and inhibits biofilm formation.

Quorum sensing-IN-8 (compound 5e) exhibits antibiofilm activity and can be used in research on antibiotic resistance.

Quorum sensing-IN-9 (Compound 7d) inhibits quorum sensing in Pseudomonas aeruginosa by binding to the PqsR protein. It suppresses the expression of quorum sensing system-related genes lasB, rhlA, and pqsA, thereby preventing the production of virulence factors elastase, pyocyanin, and rhamnolipid. Quorum sensing-IN-9 disrupts the motility of P. aeruginosa, inhibits biofilm formation, and reduces the bacterium's virulence and pathogenicity. Additionally, it exhibits anti-infective activity in the Galleria mellonella larval model.

Quorum Sensing-IN-1 [QSI-1] is a small-molecule inhibitor targeting quorum sensing.

Quorum Sensing-IN-2 (compound 23e) is a quorum sensing inhibitor that reduces bacterial pathogenicity without affecting growth, exhibits minimal hemolytic activity, effectively inhibits bacterial infections, and shows a synergistic effect when combined with Ciprofloxacin in a P. aeruginosa PAO1-infected bacteremia model [1].

Quorum sensing-IN-6 (compound 27) is a quorum sensing (QS) inhibitor with IC50 values of 8 nM and 106 nM against E.coli and Pyocyanin, respectively.

Quorum sensing-IN-7 (compound HSL 4) is an effective quorum sensing (QS) inhibitor. It interacts with the binding sites Leu 72 and Gln 95 of CviR. As an antimicrobial agent, Quorum sensing-IN-7 effectively inhibits the production of homoserine lactones (HSLs) and biofilms in C. violaceum at concentrations ranging from 0.25-1 mg mL.

Methyl anthranilate is a natural product. Methyl anthranilate is a novel quorum sensing inhibitor and anti-biofilm agent against Aeromonas sobria

2-heptyl-3-hydroxy-4(1H)-Quinolone (Pseudomonas Quinolone Signal) is a quorum-sensing signalling molecule produced by Pseudomonas aeruginosa in response to increased cell density. It increases the expression of the lasB gene in P. aeruginosa, the secretion of the metabolites pyocyanin and the lectin PA-IL, as well as increasing biofilm production in P. aeruginosa populations. It also reduces the iron content of the P. aeruginosa growth medium when used at a concentration of 40 μM and acts as an iron chelator in iron sulphate solutions.

LED209, a specific inhibitor of quorum sensor QseC of GNB, can generate a multifunctional agent PAMAM-LED209.

QStatin, a Selective Inhibitor of Quorum Sensing in Vibrio Species( SmcR with an EC50 of 208.9 nM).

Equisetin, an N-methylserine-derived acyl tetramic acid isolated from the terrestrial fungus Fusarium equiseti NRRL 5537, functions as a Quorum-sensing inhibitor (QSI) that specifically attenuates QS-regulated virulence phenotypes in P. aeruginosa, presenting a potent lead for treating P. aeruginosa infections without hindering bacterial growth. This tetramate-containing natural product possesses antibiotic and cytotoxic properties, effectively inhibiting the growth of Gram-positive bacteria and HIV-1 integrase activity, yet it does not impact Gram-negative bacteria.

Curvularin ((S)-Curvularin) is a quorum-sensing antagonist of Pseudomonas aeruginosa RhlR extractable from Curvularia lunata, a mycotoxin with anti-inflammatory activity, inhibition of cytokine-induced NO synthase, and inhibition of lipopolysaccharide-induced inflammation in antimyelocytes. study inflammation.

N-dodecanoyl-L-Homoserine lactone (C12-HSL) is a quorum sensing (QS) signaling molecule that impacts biofilm formation in bioreactors through acyl homoserine lactone (AHL) mediated microbial communication.

N-(Ketocaproyl)-DL-homoserine lactone is a quorum sensing (QS) autoinducer and a natural, active ligand of LuxR.

LasR-IN-5 (compound 3C) acts as an antagonist of LasR with an IC50 of 1.37 μM, exhibiting a 77% inhibition in the formation of Pseudomonas biofilms. Moreover, LasR-IN-5 also demonstrates inhibitory activity against quorum sensing (QS) and is applicable in infection research.

N-3-oxo-dodecanoyl-L-Homoserine lactone (3-oxo-C12-HSL), a quorum-sensing signaling molecule synthesized by P. aeruginosa and specific B. cepacia complex strains [1][2], facilitates bacterial gene expression modulation in response to cell density escalation and triggers IL-8 production in 16HBE human bronchial epithelial cells [3].

N-(beta-Ketocaproyl)-L-hoMoserine lactone (N-(Ketocaproyl)-L-homoserine lactone) is a component of quorum regulatory sensing and an autoinducer of P. fischeri luciferase.

N-hexanoyl-L-Homoserine lactone (C6-HSL), a small diffusible signaling molecule, is involved in controlling gene expression, affecting cellular metabolism, and quorum sensing.

V-06-018 is a quorum-sensing modulator. It also acts as a LasR antagonist.

ML366 is a Vibrio cholerae Quorum Sensing inhibitor Acting via the LuxO response regulator.

CAI-1 is a vibrio cholerae quorum-sensing autoinducer.

DPO is a quorum sensing (QS) self-inducer that binds and activates the transcription factor VQMA.

Violacein is a bacterial metabolite originally isolated from C. violaceum that has antibacterial and antiprotozoal activities.[1] [2] It is produced by C. violaceum as a purple pigment in response to N-hexanoyl homoserine lactone , a property that has been modified to create a strain of C. violaceum used in detecting quorum-sensing molecules.[3] Violacein is active against Gram-positive bacteria, including B. subtilis and S. aureus (MICs = 0.8 and 1.6 µM, respectively). It is also active against P. falciparum, including chloroquine-susceptible and -resistant strains (IC50s = 0.85 and 0.63 µM, respectively).[2] It reduces parasitemia in a mouse model of nonlethal P. chabaudi chabaudi infection when administered at a dose of 7.5 mg/kg and increases survival in a mouse model of lethal P. chabaudi chabaudi infection. Violacein permeabilizes the cytoplasmic membrane of bacterial cells but does not affect the cell wall.[1]