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Models | Strains | Anti-QS agents | Target | Effects | Ref |
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In-vitro | Pseudomonas aeruginosa | Lactonase SsoPox | Degradation of the acyl-homoserine lactones | Inhibited the virulence of 51 clinical P. aeruginosa isolated from diabetic foot ulcers by decreasing the secretion of proteases and pyocyanin, and biofilm formation | [72] |
In-vitro, rats | Pseudomonas aeruginosa PAO1 | Lactonase SsoPox-1 | Degradation of the acyl-homoserine lactones | Decreased lasB virulence gene activity, pyocyanin synthesis, proteolytic activity, and biofilm formation. Reduced the mortality of rats with acute pneumonia from 75% to 20%. Attenuated lung damage of the rat model | [73] |
In-vitro | A.baumannii S1,S2,S3 | Engineered lactonase | Degradation of the acyl-homoserine lactones | Reduced the biomass of A. baumannii associated biofilms | [74] |
In-vitro | Pseudomonas aeruginosa | Lactonase Aii810 | Degradation of the acyl-homoserine lactones | Attenuated Virulence Factors and Biofilm Formation. Degraded N-butyryl-L-homoserine lactone and N-(3-oxododecanoyl)-L-homoserine lactone, by 72.3 and 100% | [75] |
In-vitro | Pseudomonas aeruginosa | Overexpression of lactonase enzyme AHL-1 | Degradation of the acyl-homoserine lactones | Reduced the protease, pyocyanin, rhamnolipids. Inhibited the activities on the swarming motility and biofilm formation | [76] |
In-vitro | Pseudomonas aeruginosa | Novel Lactonase cloned by bpiB01, bpiB04 | Degradation of the N-(3-oxooctanoyl)-L-homoserine lactone | Inhibited motility and biofilm formation | [77] |
In-vitro | Pseudomonas aeruginosa PAO1 | Lactonase AiiK | Degradation of the acyl-homoserine lactones | Inhibited the biofilm formation and attenuates extracellular proteolytic activity and pyocyanin production | [78] |
In-vitro | Pseudomonas aeruginosa PAO1 | N-Acyl-Homoserine Lactone Acylase PA2385 | Degradation of 3-oxo-C12-HSL and 2-heptyl-3-hydroxy-4(1H)- quinolone | Reduced production of the virulence factors elastase and pyocyanin | [85] |
In-vitro, C. elegans | Pseudomonas aeruginosa PAO1 | NADP-dependent short-chain dehydrogenase/reductase (bpiB09) | Inactivation of N-(3-oxo-dodecanoyl)-L-homoserine lactone (3-oxo-C12-HSL) | Reduced pyocyanin production, decreased motility, poor biofilm formation and absent paralysis of C. elegans | [91] |
In-vitro, plant | Pseudomonas aeruginosa PAO1 | 3-hydroxy-2-methyl-4(1H)-quinolone | Catalyzing the conversion of PQS to N-octanoylanthranilic acid and carbon monoxide | Reduced expression of the PQS biosynthetic gene pqsA, expression of the PQS-regulated virulence determinants lectin A, pyocyanin, and rhamnolipids, and virulence in plant | [94] |
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