scholarly journals Screening and quantification of anti-quorum sensing and antibiofilm activities of phyllosphere bacteria against biofilm forming bacteria

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Nadine Amabel Theodora ◽  
Vania Dominika ◽  
Diana Elizabeth Waturangi
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Quorum Sensing ◽  
Crude Extract ◽  
Pathogenic Bacteria ◽  
Antibiofilm Activity ◽  
Biofilm Inhibition ◽  
Crude Extracts ◽  
Turbid Zone ◽  
Phyllosphere Bacteria

Abstract Objective The objectives of this research were to screen anti-quorum sensing activity of phyllosphere bacteria and quantify their antibiofilm activity against biofilm forming bacteria (Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Salmonella typhimurium, Vibrio cholerae, Pseudomonas aeruginosa). Results We found 11 phyllosphere bacteria isolates with potential anti-quorum sensing activity. Most of the crude extracts from phyllosphere bacteria isolates had anti-quorum sensing activity against Chromobacterium violaceum at certain concentration (20 and 10 mg/mL), but not crude extract from isolate JB 7F. Crude extract showed the largest turbid zone (1,27 cm) using isolate JB 14B with concentration of 10 mg/mL and the narrowest turbid zone isolate (1 cm) using JB 18B with concentration of 10 mg/mL. Crude extracts showed various antibiofilm activities against all tested pathogenic bacteria, it showed the highest biofilm inhibition (90%) and destruction activities (76%) against S. aureus.

scholarly journals Screening And Quantification Of Anti-Quorum Sensing And Antibiofilm Activities Of Phyllosphere Bacteria Against Biofilm Forming Bacteria

2019 ◽  
Author(s):  
NADINE AMABEL THEODORA ◽  
VANIA DOMINIKA ◽  
Diana Elizabeth Waturangi
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Quorum Sensing ◽  
Salmonella Typhimurium ◽  
Enterococcus Faecalis ◽  
Crude Extract ◽  
Pathogenic Bacteria ◽  
Antibiofilm Activity ◽  
Crude Extracts ◽  
Phyllosphere Bacteria

Abstract Objective The objectives of this research were to screen anti-quorum sensing activity of phyllosphere bacteria and quantify their antibiofilm activity against biofilm forming bacteria ( Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Salmonella typhimurium, Vibrio cholerae, Pseudomonas aeruginosa). Results We found 11 phyllosphere bacteria isolates with potential anti-quorum sensing activity. Most of the crude extracts from phyllosphere bacteria isolates had anti-quorum sensing activity against Chromobacterium violaceum at certain concentration (20 and 10 mg/mL), but not crude extract from isolate JB 7F. Crude extracts showed various antibiofilm activities against all tested pathogenic bacteria.

scholarly journals Screening And Quantification Of Anti-Quorum Sensing And Antibiofilm Activities Of Phyllosphere Bacteria Against Biofilm Forming Bacteria

2019 ◽  
Author(s):  
NADINE AMABEL THEODORA ◽  
VANIA DOMINIKA ◽  
Diana Elizabeth Waturangi
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Quorum Sensing ◽  
Salmonella Typhimurium ◽  
Enterococcus Faecalis ◽  
Crude Extract ◽  
Pathogenic Bacteria ◽  
Antibiofilm Activity ◽  
Crude Extracts ◽  
Phyllosphere Bacteria

Abstract Objective The objectives of this research were to screen anti-quorum sensing activity of phyllosphere bacteria and quantify their antibiofilm activity against biofilm forming bacteria ( Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Salmonella typhimurium, Vibrio cholerae, Pseudomonas aeruginosa). Results We found 11 phyllosphere bacteria isolates with potential anti-quorum sensing activity. Most of the crude extracts from phyllosphere bacteria isolates had anti-quorum sensing activity against Chromobacterium violaceum at certain concentration (20 and 10 mg/mL), but not crude extract from isolate JB 7F. Crude extracts showed various antibiofilm activities against all tested pathogenic bacteria.

scholarly journals Peptide Mix from Olivancillaria hiatula Interferes with Cell-to-Cell Communication in Pseudomonas aeruginosa

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Edward Ntim Gasu ◽  
Hubert Senanu Ahor ◽  
Lawrence Sheringham Borquaye
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Quorum Sensing ◽  
Biofilm Formation ◽  
Antimicrobial Agents ◽  
Cell Communication ◽  
Microtiter Plate ◽  
Antibiofilm Activity ◽  
Dependent Manner ◽  
Biofilm Inhibition ◽  
Swarming Motility

Bacteria in biofilms are encased in an extracellular polymeric matrix that limits exposure of microbial cells to lethal doses of antimicrobial agents, leading to resistance. In Pseudomonas aeruginosa, biofilm formation is regulated by cell-to-cell communication, called quorum sensing. Quorum sensing facilitates a variety of bacterial physiological functions such as swarming motility and protease, pyoverdine, and pyocyanin productions. Peptide mix from the marine mollusc, Olivancillaria hiatula, has been studied for its antibiofilm activity against Pseudomonas aeruginosa. Microscopy and microtiter plate-based assays were used to evaluate biofilm inhibitory activities. Effect of the peptide mix on quorum sensing-mediated processes was also evaluated. Peptide mix proved to be a good antibiofilm agent, requiring less than 39 μg/mL to inhibit 50% biofilm formation. Micrographs obtained confirmed biofilm inhibition at 1/2 MIC whereas 2.5 mg/mL was required to degrade preformed biofilm. There was a marked attenuation in quorum sensing-mediated phenotypes as well. At 1/2 MIC of peptide, the expression of pyocyanin, pyoverdine, and protease was inhibited by 60%, 72%, and 54%, respectively. Additionally, swarming motility was repressed by peptide in a dose-dependent manner. These results suggest that the peptide mix from Olivancillaria hiatula probably inhibits biofilm formation by interfering with cell-to-cell communication in Pseudomonas aeruginosa.

Antibacterial and antibiofilm activity of the bacteriocin-producing strain Leuconostoc mesenteroides CHBY46 isolated from Algerian dromedary milk against Pseudomonas aeruginosa and Staphylococcus aureus biofilms

2019 ◽  
Vol 8 (4) ◽  
pp. 120-131
Author(s):  
Yahia Bellil ◽  
Zineb Benmechernene ◽  
Wassila Chahrour Bellil ◽  
Mebrouk Kihal
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
16S Rrna Gene Sequencing ◽  
Antibiofilm Activity ◽  
Rrna Gene ◽  
Biofilm Inhibition ◽  
Staph Aureus ◽  
Spoilage Bacteria ◽  
Dromedary Milk ◽  
And Staphylococcus Aureus

In order to control biofilm formation of pathogenic and spoilage bacteria in foods, some species of Leuconostoc are very important in food industries, as they increase the shelf life of foods during preservation. In this study the strain CHBY46 a bacteriocin-producing strain belonging to Leuconostoc ge-nus isolated from dromedary milk in the south of Algeria was characterized by 16S rRNA gene sequencing and MALDITOF MS mass spectrometry, tested for its antibacterial and antibiofilm activities against Pseudomonas aeruginosa and Staphylococcus aureus. The produced bacteriocin was partially puri-fied with sulfate ammonium precipitation and RP-HPLC. The strain CHBY46 was classified as Leuc. mesenteroides after molecular identification. Among the bacteria tested the pathogens Staph. aureus ATCC 29213 and Ps. aeru-ginosa ATCC 27653 were sensitive to this bacteriocin with 480 AU/ml. Antibi-ofilm activity was investigated by crystal violet assay. The bacteriocin of Leuc. mesenteroides CHBY 46 exhibited significant biofilm inhibition ; 35.58% with Ps. aeruginosa, and 42.11% with Staph. aureus. Tricine-SDS-PAGE analysis of the partially purified bacteriocin indicated a low molecular weight of approximately 3.5 kDa. Therfore, we conclude that bacteriocins from Leuco-nostoc have the potential as a therapeutic strategy against pathogen’s bio-films, which contribute, to bacterial pathogenicity and resistance toward antibiotics or being used in foods as adjunsts to contribute food safety.

scholarly journals Antibiofilm Activity of Antarctic Sponge-Associated Bacteria against Pseudomonas aeruginosa and Staphylococcus aureus

2021 ◽  
Vol 9 (3) ◽  
pp. 243
Author(s):  
Carmen Rizzo ◽  
Vincenzo Zammuto ◽  
Angelina Lo Giudice ◽  
Maria Giovanna Rizzo ◽  
Antonio Spanò ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Laser Scanning ◽  
Model Organisms ◽  
Confocal Laser ◽  
Antibiofilm Activity ◽  
Associated Bacteria ◽  
Crude Extracts ◽  
Sponge Associated Bacteria ◽  
And Staphylococcus Aureus

Bioprospecting in unusual marine environments provides an innovative approach to search novel biomolecules with antibiofilm activity. Antarctic sponge-associated bacteria belonging to Colwellia, Pseudoalteromonas, Shewanella and Winogradskyella genera were evaluated for their ability to contrast the biofilm formation by Pseudomonas aeruginosa ATCC 27853 and Staphylococcus aureus ATCC 29213, as model organisms. All strains were able to produce biofilm at both 4 and 25 °C, with the highest production being for Colwellia, Shewanella and Winogradskyella strains at 4 °C after 24 h. Antibiofilm activity of cell-free supernatants (CFSs) differed among strains and on the basis of their incubation temperature (CFSs4°C and CFSs25°C). The major activity was observed by CFSs4°C against S. aureus and CFSs25°C against P. aeruginosa, without demonstrating a bactericidal effect on their growth. Furthermore, the antibiofilm activity of crude extracts from Colwellia sp. GW185, Shewanella sp. CAL606, and Winogradskyella sp. CAL396 was also evaluated and visualized by confocal laser scanning microscopic images. Results based on the surface-coating assay and surface tension measurements suggest that CFSs and the crude extracts may act as biosurfactants inhibiting the first adhesion of P. aeruginosa and S. aureus. The CFSs and the novel biopolymers may be useful in applicative perspectives for pharmaceutical and environmental purposes.

scholarly journals Biofilm-Associated Agr and Sar Quorum Sensing Systems of Methicillin-Resistant Staphylococcus Aureus are Inhibited by Fruit Extracts of Illicium Verum

2019 ◽  
Author(s):  
Pitchaipillai Sankar Ganesh ◽  
Veena Krishnamurthy ◽  
Koneti ISwamy ◽  
Suvaiyarasan Suvaithenamudhan ◽  
Murugesan Amuthan ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Molecular Docking ◽  
Quorum Sensing ◽  
Light Microscopy ◽  
Major Constituent ◽  
Antibiofilm Activity ◽  
Systems Methodology ◽  
Biofilm Inhibition ◽  
Swarming Motility

Background: Staphylococcus aureus (S. aureus) is an opportunistic pathogen and a predominant cause of life-threatening nosocomial infections. Drug resistance in S. aureus is attributed to production of biofilm, which is controlled largely by bacterial quorum sensing (QS) systems. Methodology: In vitro analysis of biofilm inhibition assay was performed using crystal violet staining assay, swarming motility, light microscopy and growth curve analyses. Identification of the major constituents of I. verum fruit extract was performed by GC-MS. Ligand-protein interaction was analyzed by molecular docking investigations. Results: The methanol extract of I. verum inhibited the growth of MRSA at the concentration of 4.8 mg/ml. At the sub-inhibitory concentration (2.4mg/ml), the extract showed significant reduction in biofilmogenesis. Light microscopy analysis confirmed the antibiofilm activity as well as the efficacy in disturbing biofilm architecture. A reduced swarming motility was observed at the lowest concentration of 2.4mg/ml. GC-MS analysis revealed anethol (AL) as the major constituent. The molecular docking analysis attributes the antibiofilm activity to an active ligand AL, which strongly interacted with the active site residues of AgrA and SarA proteins of S. aureus. Conclusion: We report the activities of I. verum to be immensely interfering with QS system and biofilm formation in MRSA.

scholarly journals Quantification of anti-quorum sensing and antibiofilm activity of Phyllosphere bacteria against food spoilage bacteria

2021 ◽  
pp. e919
Author(s):  
Valencia Vanessa ◽  
Diana Elizabeth Waturangi
Keyword(s):  
Quorum Sensing ◽  
Bioactive Compounds ◽  
Large Population ◽  
Cell Communication ◽  
Antibiofilm Activity ◽  
Food Spoilage ◽  
Biofilm Inhibition ◽  
Sensing Mechanism ◽  
Spoilage Bacteria ◽  
Phyllosphere Bacteria

Food spoilage and microbial contamination require  attention during the food production process since the presence of these bacteria can create problems including the formation of biofilms produced by these  bacteria. Biofilm formations are initiated through cell-to-cell communication which is called quorum sensing mechanism. Hence, inhibition of this communication  mechanism could be one of the solutions to inhibit  biofilm formation. Therefore, exploration of bioactive compounds from various sources including  hyllosphere bacteria with anti-quorum sensing inhibition activities is important. Phyllosphere bacteria are a community of bacteria found on the surface of plant leaves at a very  large population. These bacteria can produce bioactive compounds that can inhibit quorum sensing mechanism. In this study, 54 phyllosphere bacteria  isolates were tested, 8 bacterial isolates had potential effect to inhibit quorum sensing. From biofilm inhibition assay, the highest percentages were showed by  ifferent phyllosphere isolates against each pathogen. Whereas, for biofilm destruction assay, JB 8F isolate had the highest percentage of destruction biofilm activity  against biofilm formed by Bacillus cereus and  Shewanella putrefaciens. Eight isolates of phyllosphere  bacteria had the potential as quorum quencher and  anti-biofilm agents, both for inhibition and destruction of biofilm.  

scholarly journals Screening and Quantification of Antiquorum-Sensing Activity of Actinobacteria Isolates Against Gram-Positive and Gram-Negative Biofilm Associated Bacteria

2020 ◽  
Author(s):  
Marco Wijaya ◽  
Dea Delicia ◽  
Diana Elizabeth Waturangi
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Salmonella Typhimurium ◽  
Pathogenic Bacteria ◽  
Quorum Quenching ◽  
Antibiofilm Activity ◽  
Gram Positive ◽  
Marine Actinobacteria ◽  
Associated Bacteria ◽  
Gram Negative

Abstract Objectives: The purpose of the study is to screen antiquorum sensing activity compound from actinobacteria using Chromobacterium violaceum as indicator and quantify the antibiofilm activity against several biofilm-forming pathogenic bacteria, such as Staphylococcus aureus ATCC 29213, Bacillus cereus ATCC 14579, Enterococcus faecalis ATCC 33186, Vibrio cholerae , Salmonella typhimurium , Pseudomonas aeruginosa ATCC 27853.Results: Crude extracts from marine actinobacteria isolated from Indonesia were promising for treating biofilm-related diseases. Out of 40 isolates 10 were found to have great quorum quenching activity against C. violaceum. Moreover, these isolates were able to inhibit biofim formation by Gram positive and Gram negative pathogenic bacteria. Quorum quenching agents in extracts of 1AC, 14PM, 16PM, 18PM, and CW17 isolates were predicted as proteins or enzymes.

scholarly journals Extract from phyllosphere bacteria with antibiofilm and quorum quenching activity to control several fish pathogenic bacteria

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Olivia Nathalia ◽  
Diana Elizabeth Waturangi
Keyword(s):  
Streptococcus Agalactiae ◽  
Aeromonas Hydrophila ◽  
Biofilm Formation ◽  
Pathogenic Bacteria ◽  
Vibrio Harveyi ◽  
Quorum Quenching ◽  
Indicator Bacteria ◽  
Antibiofilm Activity ◽  
Fish Pathogen ◽  
Phyllosphere Bacteria

Abstract Objective The objective of this research were to screen quorum quenching activity compound from phyllosphere bacteria as well as antibiofilm activity against several fish pathogen bacteria such as Aeromonas hydrophila, Streptococcus agalactiae, and Vibrio harveyi. Results We found eight phyllosphere bacteria isolates with potential quorum quenching activity to inhibit Chromobacterium violaceum as indicator bacteria. Crude extracts (20 mg/mL) showed various antibiofilm activity against fish pathogenic bacteria used in this study. Isolate JB 17B showed the highest activity to inhibit biofilm formation of A. hydrophila and V. harveyi, meanwhile isolate JB 3B showed the highest activity to inhibit biofilm of S. agalactiae. From destruction assay, isolate JB 8F showed the highest activity to disrupt biofilm of A. hydrophila isolate JB 20B showed the highest activity to disrupt biofilm of V. harveyi, isolate JB 17B also showed the highest activity to disrupt biofilm of S. agalactiae.

scholarly journals Assessing the Molecular Targets and Mode of Action of Furanone C-30 on Pseudomonas aeruginosa Quorum Sensing

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1620
Author(s):  
Victor Markus ◽  
Karina Golberg ◽  
Kerem Teralı ◽  
Nazmi Ozer ◽  
Esti Kramarsky-Winter ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibiotic Resistance ◽  
Quorum Sensing ◽  
Conformational Changes ◽  
Mode Of Action ◽  
Pathogenic Bacteria ◽  
Molecular Targets ◽  
Resistant Bacteria ◽  
Public Healthcare ◽  
C 30

Quorum sensing (QS), a sophisticated system of bacterial communication that depends on population density, is employed by many pathogenic bacteria to regulate virulence. In view of the current reality of antibiotic resistance, it is expected that interfering with QS can address bacterial pathogenicity without stimulating the incidence of resistance. Thus, harnessing QS inhibitors has been considered a promising approach to overriding bacterial infections and combating antibiotic resistance that has become a major threat to public healthcare around the globe. Pseudomonas aeruginosa is one of the most frequent multidrug-resistant bacteria that utilize QS to control virulence. Many natural compounds, including furanones, have demonstrated strong inhibitory effects on several pathogens via blocking or attenuating QS. While the natural furanones show no activity against P. aeruginosa, furanone C-30, a brominated derivative of natural furanone compounds, has been reported to be a potent inhibitor of the QS system of the notorious opportunistic pathogen. In the present study, we assess the molecular targets and mode of action of furanone C-30 on P. aeruginosa QS system. Our results suggest that furanone C-30 binds to LasR at the ligand-binding site but fails to establish interactions with the residues crucial for the protein’s productive conformational changes and folding, thus rendering the protein dysfunctional. We also show that furanone C-30 inhibits RhlR, independent of LasR, suggesting a complex mechanism for the agent beyond what is known to date.

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