Corchorus olitorius aqueous extract attenuates quorum sensing-regulated virulence factor production and biofilm formation
- Author:
M.Al-Yousef HANAN
1
;
Alam PERWEZ
;
Khanam ZAKIA
;
Amina MUSARAT
;
H.B.Hassan WAFAA
Author Information
- Keywords: Corchorus olitorius L; Anti-quorum sensing activity; Pseudomonas aeruginosa; Chromobacterium violaceum; Virulence factors
- From:Asian Pacific Journal of Tropical Biomedicine 2021;11(2):66-73
- CountryChina
- Language:Chinese
- Abstract: Objective:To investigate the effect of Corchorus olitorius aqueous fraction (COAF) on quorum sensing (QS)-regulated virulence factors and biofilm formation in Pseudomonas aeruginosa (PAO1). Methods:The preliminary screening of the anti-QS effect of COAF was performed by evaluating the anti-pathogenic activity against Chromobacterium violaceum CV026 biosensor strain. Next, the inhibitory effects of COAF on QS-regulated pyocyanin production, proteolytic and elastolytic activities, swarming motility, and biofilm formation were evaluated in PAO1.Results:The results showed that the treatment of COAF significantly decreased the biofilm biomass, attenuated virulence factors, and inhibited swarming motility of PAO1 without affecting the growth of the bacteria in a dose-dependent manner. COAF at 2000 μg/mL significantly decreased Las B elastase activity in PAO1 culture, exopolysaccharide production, swarming motility, pyocyanin level, and biomass of PAO1 by 55％ (P<0.05), 60％ (P<0.01), 61％ (P<0.01), 65％(P<0.01) and 73％ (P<0.01), respectively. In addition, the production of violacein was decreased by 62％ (P<0.01) with the treatment of a high dose of COAF. Conclusions:These findings indicate that COAF can be a potential source of anti-QS agents.
