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Zhang Y, Qian Y, Zhang M, Qiao W. Repairing of rutin to the toxicity of combined F-53B and chromium pollution on the biofilm formed by Pseudomonas aeruginosa. J Environ Sci (China) 2023; 127:158-168. [PMID: 36522050 DOI: 10.1016/j.jes.2021.12.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 12/15/2021] [Accepted: 12/15/2021] [Indexed: 06/17/2023]
Abstract
The wastewater discharge from the process of chrome plating, which contains 6:2 chlorinated polyfluorinated ether sulfonate (F-53B) and chromium (Cr), may be toxic to biofilm. In this study we found that the biofilm formed by Pseudomonas aeruginosa PAO1 was inhibited by exposure to a combination of F-53B and Cr(VI). The combined pollution damaged the cell membranes and the structure of the biofilm, and inhibited the production of the Pseudomonas quinolone-based signal, which affected biofilm formation. Moreover, the secretion of extracellular polymeric substances decreased as a result of this combined exposure. Exposure to F-53B and Cr(VI) individually or in combination could induce the excessive accumulation of intracellular reactive oxygen species (ROS), and the ROS positive rate of the bacteria increased under the treatment with 0.2 mmol/L of Cr(VI) and 250 nmol/L of F-53B, respectively. In addition, the activities of superoxide dismutase (SOD) and catalase (CAT) were enhanced for scavenging ROS in the bacteria that were exposed to Cr(VI) and F-53B. As an antioxidant, rutin was used to repair the toxicity of Cr(VI) and F-53B towards the biofilm formed by the bacteria. When rutin was added to the bacteria medium, with either Cr(VI) or F-53B as pollutant, or with the combined pollutants, the extracellular protein content of the bacteria recovered to 0.84, 0.94, and 0.85 times that of the control, respectively. Meanwhile, the accumulation of ROS and the activities of SOD and CAT decreased, which indicated that the addition of rutin can alleviate the oxidative stress and promote the antioxidant stress system.
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Affiliation(s)
- Yunhao Zhang
- Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Yi Qian
- Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Ming Zhang
- Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Weichuan Qiao
- Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
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2
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Lahiri P, Gogoi P, Ghosh D. Single-Step Capture and Targeted Metabolomics of Alkyl-Quinolones in Outer Membrane Vesicles (OMVs) of Pseudomonas Aeruginosa. Methods Mol Biol 2023; 2625:201-216. [PMID: 36653645 DOI: 10.1007/978-1-0716-2966-6_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Outer membrane vesicles (OMVs), also called as bacterial membrane vesicles (BMVs), are secreted by many Gram-negative bacterial pathogens. These nanoscale vesicles traffic discrete arrays of virulence factors that can often induce complex pathologies far from the infection sites. The OMVs of P. aeruginosa, often regarded as the gold standard of BMVs are known to traffic a battery of specific small MW alkyl-quinolones (AQs). These AQs function like primordial hormones by modulating intra-species and inter-species bacterial interactions. They can also perform cross-kingdom signaling with the human host and directly exacerbate pathogenesis. The discrete isotopic signatures of AQs enjoy potential in the mass spectrometry-based diagnosis P. aeruginosa infections. Matrix-free laser desorption/ionization mass spectrometry (LDI-MS) presents a robust, cost-effective platform to fit this demand. We describe a LDI-MS system using inert ceramic filters that performs dual role of single-step enrichment of OMVs and matrix-free ionization/identification of AQs in situ.
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Affiliation(s)
- Pallavi Lahiri
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Priyakshi Gogoi
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Dipankar Ghosh
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.
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3
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Vivero-Gomez RJ, Mesa GB, Higuita-Castro J, Robledo SM, Moreno-Herrera CX, Cadavid-Restrepo G. Detection of Quorum Sensing Signal Molecules, Particularly N-Acyl Homoserine Lactones, 2-Alky-4-Quinolones, and Diketopiperazines, in Gram-Negative Bacteria Isolated From Insect Vector of Leishmaniasis. FRONTIERS IN TROPICAL DISEASES 2021. [DOI: 10.3389/fitd.2021.760228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Gram-negative bacteria are known to use a quorum sensing system to facilitate and stimulate cell to cell communication, mediated via regulation of specific genes. This system is further involved in the modulation of cell density and metabolic and physiological processes that putatively either affect the survival of insect vectors or the establishment of pathogens transmitted by them. The process of quorum sensing generally involves N-acyl homoserine lactones and 2-alkyl-4-quinolones signaling molecules. The present study aimed to detect and identify quorum sensing signaling molecules of AHLs and AHQs type that are secreted by intestinal bacteria, and link their production to their extracellular milieu and intracellular content. Isolates for assessment were obtained from the intestinal tract of Pintomyia evansi (Leishmania insect vector). AHLs and AHQs molecules were detected using chromatography (TLC) assays, with the aid of specific and sensitive biosensors. For identity confirmation, ultra-high-performance liquid chromatography coupled with mass spectrometry was used. TLC assays detected quorum sensing molecules (QSM) in the supernatant of the bacterial isolates and intracellular content. Interestingly, Pseudomonas otitidis, Enterobacter aerogenes, Enterobacter cloacae, and Pantoea ananatis isolates showed a migration pattern similar to the synthetic molecule 3-oxo-C6-HSL (OHHL), which was used as a control. Enterobacter cancerogenus secreted C6-HSL, a related molecules to N-hexanoyl homoserine lactone (HHL), while Acinetobacter gyllenbergii exhibited a migration pattern similar to 2-heptyl-4-quinolone (HHQ) molecules. In comparison to this, 3-oxo-C12-HSL (OdDHL) type molecules were produced by Lysobacter soli, Pseudomonas putida, A. gyllenbergii, Acinetobacter calcoaceticus, and Pseudomonas aeruginosa, while Enterobacter cloacae produced molecules similar to 2-heptyl-3-hydroxy-4-quinolone (PQS). For Pseudomonas putida, Enterobacter aerogenes, P. ananatis, and Pseudomonas otitidis extracts, peak chromatograms with distinct retention times and areas, consistent with the molecules described in case of TLC, were obtained using HPLC. Importantly, P. ananatis produced a greater variety of high QSM concentration, and thus served as a reference for confirmation and identification by UHPLC-MRM-MS/MS. The molecules that were identified included N-hexanoyl-L-homoserine lactone [HHL, C10H18NO3, (M + H)], N-(3-oxohexanoyl)-L-homoserine lactone [OHHL, C10H16NO4, (M + H)], N-(3-oxododecanoyl)-L-homoserine lactone [OdDHL, C16H28NO4, (M + H)], and 2-heptyl-3-hydroxy-4(1H)-quinolone [PQS, C16H22NO2, (M + H)]. Besides this, the detection of diketopiperazines, namely L-Pro-L-Tyr and ΔAla-L-Val cyclopeptides was reported for P. ananatis. These molecules might be potentially associated with the regulation of QSM system, and might represent another small molecule-mediated bacterial sensing system. This study presents the first report regarding the detection and identification of QSM and diketopiperazines in the gut sand fly bacteria. The possible effect of QSM on the establishment of Leishmania must be explored to determine its role in the modulation of intestinal microbiome and the life cycle of Pi. evansi.
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Patent highlights June-July 2021. Pharm Pat Anal 2021; 10:237-244. [PMID: 34753317 DOI: 10.4155/ppa-2021-0022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A snapshot of noteworthy recent developments in the patent literature of relevance to pharmaceutical and medical research and development.
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5
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Oziat J, Cohu T, Elsen S, Gougis M, Malliaras GG, Mailley P. Electrochemical detection of redox molecules secreted by Pseudomonas aeruginosa - Part 1: Electrochemical signatures of different strains. Bioelectrochemistry 2021; 140:107747. [PMID: 33618190 DOI: 10.1016/j.bioelechem.2021.107747] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/07/2021] [Accepted: 01/10/2021] [Indexed: 10/22/2022]
Abstract
During infections, fast identification of the microorganisms is critical to improve patient treatment and to better manage antibiotics use. Electrochemistry exhibits several advantages for rapid diagnostic: it enables easy, cheap and in situ analysis of redox molecules in most liquids. In this work, several culture supernatants of different Pseudomonas aeruginosa strains (including PAO1 and its isogenic mutants PAO1ΔpqsA, PA14, PAK and CHA) were analyzed by square wave voltammetry on glassy carbon electrode during the bacterial growth. The obtained voltamograms shown complex traces exhibiting numerous redox peaks with potential repartitions and current amplitudes depending on the studied bacterium and/or growth time. Among them, some peaks were clearly associated to the well-known redox toxin Pyocyanin (PYO) and the autoinducer Pseudomonas Quinolone Signal (PQS). Other peaks were observed that are not yet attributed to known secreted species. Each complex electrochemical response (number of peaks, peak potential and amplitude) can be interpreted as a fingerprint or "ID-card" of the studied strain that may be implemented for fast bacteria strain identification.
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Affiliation(s)
- Julie Oziat
- Univ. Grenoble-Alpes, CEA Leti, MINATEC Campus, F-38054 Grenoble, France; Department of Bioelectronics, Ecole Nationale Supérieure des Mines de Saint-Etienne, F-13541 Gardanne, France; Bioserenity, Institut du Cerveau et de la Moelle Epinière, 47 Bd de l'Hôpital, 75013 Paris, France
| | - Thibaut Cohu
- Univ. Grenoble-Alpes, CEA Leti, MINATEC Campus, F-38054 Grenoble, France
| | - Sylvie Elsen
- UMR 1036, INSERM-CEA-UJF, CNRS ERL5261, BIG, CEA-Grenoble, F-38054 Grenoble, France
| | - Maxime Gougis
- Univ. Grenoble-Alpes, CEA Leti, MINATEC Campus, F-38054 Grenoble, France
| | - George G Malliaras
- Department of Bioelectronics, Ecole Nationale Supérieure des Mines de Saint-Etienne, F-13541 Gardanne, France; Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK
| | - Pascal Mailley
- Univ. Grenoble-Alpes, CEA Leti, MINATEC Campus, F-38054 Grenoble, France.
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Šegan S, Opsenica D, Milojković-Opsenica D. Thin-layer chromatography in medicinal chemistry. J LIQ CHROMATOGR R T 2019. [DOI: 10.1080/10826076.2019.1585615] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sandra Šegan
- ICTM – Department of Chemistry, University of Belgrade, Belgrade, Serbia
| | - Dejan Opsenica
- ICTM – Department of Chemistry, University of Belgrade, Belgrade, Serbia
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7
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Rajput A, Kumar M. Computational Exploration of Putative LuxR Solos in Archaea and Their Functional Implications in Quorum Sensing. Front Microbiol 2017; 8:798. [PMID: 28515720 PMCID: PMC5413776 DOI: 10.3389/fmicb.2017.00798] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 04/19/2017] [Indexed: 11/13/2022] Open
Abstract
LuxR solos are unexplored in Archaea, despite their vital role in the bacterial regulatory network. They assist bacteria in perceiving acyl homoserine lactones (AHLs) and/or non-AHLs signaling molecules for establishing intraspecies, interspecies, and interkingdom communication. In this study, we explored the potential LuxR solos of Archaea from InterPro v62.0 meta-database employing taxonomic, probable function, distribution, and evolutionary aspects to decipher their role in quorum sensing (QS). Our bioinformatics analyses showed that putative LuxR solos of Archaea shared few conserved domains with bacterial LuxR despite having less similarity within proteins. Functional characterization revealed their ability to bind various AHLs and/or non-AHLs signaling molecules that involve in QS cascades alike bacteria. Further, the phylogenetic study indicates that Archaeal LuxR solos (with less substitution per site) evolved divergently from bacteria and share distant homology along with instances of horizontal gene transfer. Moreover, Archaea possessing putative LuxR solos, exhibit the correlation between taxonomy and ecological niche despite being the inhabitant of diverse habitats like halophilic, thermophilic, barophilic, methanogenic, and chemolithotrophic. Therefore, this study would shed light in deciphering the role of the putative LuxR solos of Archaea to adapt varied habitats via multilevel communication with other organisms using QS.
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Affiliation(s)
- Akanksha Rajput
- Bioinformatics Centre, Institute of Microbial Technology, Council of Scientific and Industrial ResearchChandigarh, India
| | - Manoj Kumar
- Bioinformatics Centre, Institute of Microbial Technology, Council of Scientific and Industrial ResearchChandigarh, India
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8
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Verbeke F, De Craemer S, Debunne N, Janssens Y, Wynendaele E, Van de Wiele C, De Spiegeleer B. Peptides as Quorum Sensing Molecules: Measurement Techniques and Obtained Levels In vitro and In vivo. Front Neurosci 2017; 11:183. [PMID: 28446863 PMCID: PMC5388746 DOI: 10.3389/fnins.2017.00183] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 03/20/2017] [Indexed: 12/12/2022] Open
Abstract
The expression of certain bacterial genes is regulated in a cell-density dependent way, a phenomenon called quorum sensing. Both Gram-negative and Gram-positive bacteria use this type of communication, though the signal molecules (auto-inducers) used by them differ between both groups: Gram-negative bacteria use predominantly N-acyl homoserine lacton (AHL) molecules (autoinducer-1, AI-1) while Gram-positive bacteria use mainly peptides (autoinducer peptides, AIP or quorum sensing peptides). These quorum sensing molecules are not only involved in the inter-microbial communication, but can also possibly cross-talk directly or indirectly with their host. This review summarizes the currently applied analytical approaches for quorum sensing identification and quantification with additionally summarizing the experimentally found in vivo concentrations of these molecules in humans.
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Affiliation(s)
- Frederick Verbeke
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Severine De Craemer
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Nathan Debunne
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Yorick Janssens
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Evelien Wynendaele
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Christophe Van de Wiele
- Department of Nuclear Medicine, AZ GroeningeKortrijk, Belgium.,Department of Nuclear Medicine and Radiology, Faculty of Medicine and Health Sciences, Ghent UniversityGhent, Belgium
| | - Bart De Spiegeleer
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
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9
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Buzid A, Reen FJ, Langsi VK, Muimhneacháin EÓ, O'Gara F, McGlacken GP, Luong JHT, Glennon JD. Direct and Rapid Electrochemical Detection ofPseudomonas aeruginosaQuorum Signaling Molecules in Bacterial Cultures and Cystic Fibrosis Sputum Samples through Cationic Surfactant-Assisted Membrane Disruption. ChemElectroChem 2017. [DOI: 10.1002/celc.201600590] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Alyah Buzid
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC); University College Cork, Western Road, Cork (Ireland)
- Department of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF); University College Cork; College Road Cork T12 YN60 Ireland
| | - F. Jerry Reen
- BIOMERIT Research Centre, School of Microbiology; University College Cork; College Road Cork T12 YN60 Ireland
| | - Victor K. Langsi
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC); University College Cork, Western Road, Cork (Ireland)
- Department of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF); University College Cork; College Road Cork T12 YN60 Ireland
| | - Eoin Ó Muimhneacháin
- Department of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF); University College Cork; College Road Cork T12 YN60 Ireland
| | - Fergal O'Gara
- BIOMERIT Research Centre, School of Microbiology; University College Cork; College Road Cork T12 YN60 Ireland
- School of Biomedical Sciences; Curtin Health Innovation Research Curtin University; Perth WA 6845 Australia
| | - Gerard P. McGlacken
- Department of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF); University College Cork; College Road Cork T12 YN60 Ireland
| | - John H. T. Luong
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC); University College Cork, Western Road, Cork (Ireland)
- Department of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF); University College Cork; College Road Cork T12 YN60 Ireland
| | - Jeremy D. Glennon
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC); University College Cork, Western Road, Cork (Ireland)
- Department of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF); University College Cork; College Road Cork T12 YN60 Ireland
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10
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Lahiri P, Ghosh D. Single-Step Capture and Targeted Metabolomics of Alkyl-Quinolones in Outer Membrane Vesicles of Pseudomonas aeruginosa. Methods Mol Biol 2017; 1609:171-184. [PMID: 28660582 DOI: 10.1007/978-1-4939-6996-8_15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Outer membrane vesicles (OMVs) are secreted by all Gram-ve pathogens. These nano-scale delivery vehicles contain discrete arrays of prokaryotic pathogenic determinants, including a family of low molecular weight (MW) lipidic quorum signaling alkyl-quinolones (AQs). These are synthesized from β-keto-fatty acids and function like primordial lipidic hormones, which regulate numerous pathogenic factors both inter-species and intra-species. Significantly, AQs can also directly exacerbate pathogenesis by cross-kingdom signaling with the host immune, metabolic, and other systems. In Pseudomonas aeruginosa more than 50 AQs are reported; many with pathogenic mechanisms that are largely unknown. Some of these AQs are exclusively associated with OMVs. Accurate characterization of these OMV-AQs may reveal novel mechanism of diseases and Pseudomonas aeruginosa presents an ideal model. Matrix-free laser desorption/ionization mass spectrometry (LDI-MS) technologies enjoy unique advantages in mass spectrometry (MS)-based imaging and low MW analysis. We report single-step isolation of Pseudomonas aeruginosa OMV on inert ceramic filters and high-resolution mass spectrometry (HRMS) analysis of AQs vesicle in situ.
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Affiliation(s)
- Pallavi Lahiri
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Dipankar Ghosh
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India.
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11
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Synthesis and electrochemical detection of a thiazolyl-indole natural product isolated from the nosocomial pathogen Pseudomonas aeruginosa. Anal Bioanal Chem 2016; 408:6361-7. [DOI: 10.1007/s00216-016-9749-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/17/2016] [Accepted: 06/27/2016] [Indexed: 01/05/2023]
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12
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Buzid A, Shang F, Reen FJ, Muimhneacháin EÓ, Clarke SL, Zhou L, Luong JHT, O'Gara F, McGlacken GP, Glennon JD. Molecular Signature of Pseudomonas aeruginosa with Simultaneous Nanomolar Detection of Quorum Sensing Signaling Molecules at a Boron-Doped Diamond Electrode. Sci Rep 2016; 6:30001. [PMID: 27427496 PMCID: PMC4948026 DOI: 10.1038/srep30001] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 06/27/2016] [Indexed: 12/03/2022] Open
Abstract
Electroanalysis was performed using a boron-doped diamond (BDD) electrode for the simultaneous detection of 2-heptyl-3-hydroxy-4-quinolone (PQS), 2-heptyl-4-hydroxyquinoline (HHQ) and pyocyanin (PYO). PQS and its precursor HHQ are two important signal molecules produced by Pseudomonas aeruginosa, while PYO is a redox active toxin involved in virulence and pathogenesis. This Gram-negative and opportunistic human pathogen is associated with a hospital-acquired infection particularly in patients with compromised immunity and is the primary cause of morbidity and mortality in cystic fibrosis (CF) patients. Early detection is crucial in the clinical management of this pathogen, with established infections entering a biofilm lifestyle that is refractory to conventional antibiotic therapies. Herein, a detection procedure was optimized and proven for the simultaneous detection of PYO, HHQ and PQS in standard mixtures, biological samples, and P. aeruginosa spiked CF sputum samples with remarkable sensitivity, down to nanomolar levels. Differential pulse voltammetry (DPV) scans were also applicable for monitoring the production of PYO, HHQ and PQS in P. aeruginosa PA14 over 8 h of cultivation. The simultaneous detection of these three compounds represents a molecular signature specific to this pathogen.
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Affiliation(s)
- Alyah Buzid
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Ireland.,Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - Fengjun Shang
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Ireland.,Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - F Jerry Reen
- BIOMERIT Research Centre, Department of Microbiology, University College Cork, Ireland
| | - Eoin Ó Muimhneacháin
- Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - Sarah L Clarke
- Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - Lin Zhou
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Ireland.,Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - John H T Luong
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Ireland.,Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - Fergal O'Gara
- BIOMERIT Research Centre, Department of Microbiology, University College Cork, Ireland
| | - Gerard P McGlacken
- Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
| | - Jeremy D Glennon
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Ireland.,Department of Chemistry and Analytical &Biological Chemistry Research Facility (ABCRF), University College Cork, Ireland
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13
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Zhang W, Li C. Exploiting Quorum Sensing Interfering Strategies in Gram-Negative Bacteria for the Enhancement of Environmental Applications. Front Microbiol 2016; 6:1535. [PMID: 26779175 PMCID: PMC4705238 DOI: 10.3389/fmicb.2015.01535] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 12/21/2015] [Indexed: 12/12/2022] Open
Abstract
Quorum sensing (QS) is a widespread intercellular form of communication to coordinate physiological processes and cooperative activities of bacteria at the population level, and it depends on the production, secretion, and detection of small diffusible autoinducers, such as acyl-homoserine lactones (AHLs), auto-inducing oligo-peptides (AIPs) and autoinducer 2. In this review, the function of QS autoinducers of gram-negative bacteria in different aspects of wastewater treatment systems is examined. Based on research primarily performed over the past 10 years, QS involvement in the formation of biofilm and aerobic granules and changes of the microbial community and degradation/transformation pathways is discussed. In particular, the QS pathway in the role of bacterial infections and disease prevention in aquaculture is addressed. Interference of QS autoinducer-regulated pathways is considered potential treatment for a variety of environmentally related problems. This review is expected to serve as a stepping stone for further study and development strategies based on the mediation of QS-regulated pathways to enhance applications in both wastewater treatment systems and aquaculture.
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Affiliation(s)
- Weiwei Zhang
- Department of Aquaculture, School of Marine Sciences, Ningbo University Ningbo, China
| | - Chenghua Li
- Department of Aquaculture, School of Marine Sciences, Ningbo University Ningbo, China
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14
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Vadekeetil A, Alexandar V, Chhibber S, Harjai K. Adjuvant effect of cranberry proanthocyanidin active fraction on antivirulent property of ciprofloxacin against Pseudomonas aeruginosa. Microb Pathog 2015; 90:98-103. [PMID: 26620081 DOI: 10.1016/j.micpath.2015.11.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 11/18/2015] [Accepted: 11/19/2015] [Indexed: 11/26/2022]
Abstract
Quorum sensing inhibitors (QSIs) act as antivirulent agents since quorum sensing (QS) plays a vital role in regulating pathogenesis of Pseudomonas aeruginosa. However, application of single QSI may not be effective as pathogen is vulnerable to successful mutations. In such conditions, combination of QSIs can be exploited as there can be synergistic or adjuvant action. In the present study, we evaluated the antivirulence efficacy of combination of Vaccinium macrocarpon proanthocyanidin active fraction (PAF) and ciprofloxacin (CIP) at their sub-MICs using standard methods followed by analysis of their mode of action on QS using TLC and molecular docking. There was significant improvement in action of CIP when it was combined with PAF in reducing the QS controlled virulence factors (p < 0.05), motilities and biofilm of P. aeruginosa. TLC profiles of QS signals [(Acyl homoserine lactone (AHL) and Pseudomonas quinolone signal (PQS)] indicated that CIP in combination with PAF, besides showing inhibitory action on production of AHLs, also modulated production and inactivation of PQS. Docking scores also supported the observation. We therefore hypothesize that PAF-CIP combination, having improved anti-virulence property; can be exploited as a potent drug pairing against P. aeruginosa.
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Affiliation(s)
| | - V Alexandar
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education (CARE), Chennai, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh, India.
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15
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Kumar L, Chhibber S, Kumar R, Kumar M, Harjai K. Zingerone silences quorum sensing and attenuates virulence of Pseudomonas aeruginosa. Fitoterapia 2015; 102:84-95. [PMID: 25704369 DOI: 10.1016/j.fitote.2015.02.002] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 02/10/2015] [Accepted: 02/12/2015] [Indexed: 10/24/2022]
Abstract
Quorum sensing in Pseudomonas aeruginosa plays an imperative role in virulence factor, biofilm formation and antimicrobial resistance. Blocking quorum sensing pathways are viewed as viable anti-virulent therapy in association with traditional antimicrobial therapy. Anti-quorum sensing dietary phytochemicals with may prove to be a safe and viable choice as anti-virulent drug candidates. Previously, our lab proved zingerone as potent anti-biofilm agent hence; further its anti-virulent and anti-quorum activities were evaluated. Zingerone, besides decreasing swimming, swarming and twitching phenotypes of P. aeruginosa PAO1, reduced biofilm forming capacity and production of virulence factors including rhamnolipid, elastase, protease, pyocyanin, cell free and cell bound hemolysin (p<0.001) indicating anti-virulent property attributing towards attenuation of virulence of P. aeruginosa. Further zingerone not only had marked effect on the production of quorum sensing signal molecules by clinical isolates of P. aeruginosa but also showed significant interference with the activation of QS reporter strains. To study the mechanism of blocking quorum sensing cascade, in silico analysis was carried out. Anti-QS activity was attributed to interference with the ligand receptor interaction of zingerone with QS receptors (TraR, LasR, RhlR and PqsR). Zingerone showed a good comparative docking score to respective autoinducer molecules which was even higher than that of vanillin, a proven anti-quorum sensing phytochemical. The results of the present study revealed the anti-quorum sensing activity of zingerone targeting ligand-receptor interaction, hence proposing zingerone as a suitable anti-virulent drug candidate against P. aeruginosa infections.
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Affiliation(s)
- Lokender Kumar
- Department of Microbiology, Panjab University, Chandigarh 160014, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh 160014, India
| | - Rajnish Kumar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Manoj Kumar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh 160014, India.
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Vadekeetil A, Kaur G, Chhibber S, Harjai K. Applications of thin-layer chromatography in extraction and characterisation of ajoene from garlic bulbs. Nat Prod Res 2014; 29:768-71. [PMID: 25423012 DOI: 10.1080/14786419.2014.981815] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Novel and inexpensive methods of thin-layer chromatography (TLC) were employed for the extraction, characterisation and mechanism of quorum sensing inhibition by ajoene, a component from toluene garlic bulb (Allium sativum L.) extract (TGE). TLC profiling of TGE was carried out using ethyl acetate as solvent. Out of total spots extracted from TLC, four spots exhibited quorum sensing inhibitory (QSI) potential. Among those, spot 5 was identified as Z-ajoene by TLC and confirmed by NMR and MS. HPLC analysis indicated 97.7% purity for purified ajoene. TLC densitometric analysis quantified 221.08 μmol/g of ajoene in TGE and indicated that ajoene is stable at 4°C and at acidic pH. HPTLC profiling showed that ajoene exhibits QSI effect by inhibiting the production of both long-chain acyl homoserine lactones and Pseudomonas quinolone signal (PQS) by P. aeruginosa and also by inactivating PQS molecules.
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Affiliation(s)
- Anitha Vadekeetil
- a Department of Microbiology , Panjab University , Chandigarh 160014 , India
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Bala A, Kumar L, Chhibber S, Harjai K. Augmentation of virulence related traits of pqs mutants by Pseudomonas quinolone signal through membrane vesicles. J Basic Microbiol 2014; 55:566-78. [PMID: 25283438 DOI: 10.1002/jobm.201400377] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 08/30/2014] [Indexed: 11/11/2022]
Abstract
Pathogenicity of opportunistic Pseudomonas aeruginosa is mediated through expression of different virulence determinants, most of which are under the control of quorum sensing. Besides acylhomoserine lactones, P. aeruginosa produces Pseudomonas quinolone signal (PQS) molecules which co-regulate expression of overlapping subset of genes. In the present study, effect of mutations in the pqs genes on the production of virulence factors, biofilm, and membrane vesicles (MVs) was studied using standard strain and isogenic pqs mutants of P. aeruginosa. Mutations in pqs genes severely reduced elastase, pyocyanin, siderophores, biofilm formation, and production of MVs. Further, effect of synthetic PQS on virulence of P. aeruginosa and its correlation with MVs was investigated. Supplementation of PQS resulted in enhancement of phenotypic expression of virulence factors and biofilm forming capacity of these strains. Restoration of virulent phenotype of mutants in presence of PQS indicated that PQS system play an important role in the virulence of P. aeruginosa. In addition, PQS also induced substantial release of MVs in all strains. When vesicles containing natural PQS were added to the mutants, significant increase in production of virulence factors was observed. This augmentation of the virulence traits may be associated with the efficient delivery of PQS among bacterial cells, which could be one possible mechanism of pqs system contributing to the overall virulence of P. aeruginosa.
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Affiliation(s)
- Anju Bala
- Department of Microbiology, BMS Block, Panjab University, Chandigarh, India
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Shang F, Muimhneacháin EÓ, Jerry Reen F, Buzid A, O’Gara F, Luong JH, Glennon JD, McGlacken GP. One step preparation and electrochemical analysis of IQS, a cell–cell communication signal in the nosocomial pathogen Pseudomonas aeruginosa. Bioorg Med Chem Lett 2014; 24:4703-4707. [DOI: 10.1016/j.bmcl.2014.08.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 08/04/2014] [Accepted: 08/07/2014] [Indexed: 11/27/2022]
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Pseudomonas quinolone signalling system: a component of quorum sensing cascade is a crucial player in the acute urinary tract infection caused by Pseudomonas aeruginosa. Int J Med Microbiol 2014; 304:1199-208. [PMID: 25240873 DOI: 10.1016/j.ijmm.2014.08.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 08/22/2014] [Accepted: 08/25/2014] [Indexed: 11/24/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen which employs quorum sensing system to regulate several genes required for its survival and pathogenicity within the host. Besides acylhomoserine lactone (AHL) mediated las and rhl systems, this organism possesses Pseudomonas quinolone signalling (PQS) system based on alkyl quinolone signal molecules. The quinolone system represents another layer of sophistication in the complex quorum sensing cascade. Therefore, in the present study, we evaluated the contribution of the PQS system in the establishment of acute urinary tract infection (UTI) in the mouse model. For this, wild-type parent strain of P. aeruginosa MPAO1 and its isogenic single transposon mutant strains pqsH and pqsA were employed to induce UTI in mice. PQS molecules in the tissue homogenates of mice were detected by high performance thin layer chromatography (HP-TLC) method. Virulence of strains was assessed in terms of bacteriological count, histopathological lesions in the renal and bladder tissue and generation of pathological index markers like reactive nitrogen intermediates and malondialdehyde. HP-TLC analysis showed presence of PQS molecules in the renal and bladder tissue of mice infected with MPAO1 while no PQS was detected in case of pqsH and pqsA mutant strains. Results indicated that MPAO1 possessing fully functional PQS biosynthetic genes was highly virulent and caused acute pyelonephritis with severe inflammation and tissue destruction. On the contrary, significant reduction in the log count, mild tissue damage and declined levels of pathological markers were observed in mice infected with mutant strains as compared to MPAO1. Further among mutants, all these parameters were maximally impaired in the pqsA mutant in which synthesis of alkyl quinolones was completely abolished due to the transposon mutation in respective gene. Virulence of the pqsH mutant strain was lesser than that of the MPAO1 but higher than pqsA mutant. In addition, the levels of locally generated pro- and anti-inflammatory cytokines were also found to be low in the renal homogenates of mice infected with the mutant strains. Further, supplementation of strains with PQS resulted in significant enhancement in the virulence as indicated by increased bacterial load, severe histopathological damage and enhanced levels of pro-inflammatory cytokines. These findings provide a new insight into the relevant importance of the Pseudomonas quinolone signalling system in the acute UTI caused by P. aeruginosa. This system can be a potential target for futuristic anti-infective approach against this organism.
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