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Naga NG, Zaki AA, El-Badan DE, Rateb HS, Ghanem KM, Shaaban MI. Inhibition of Pseudomonas aeruginosa quorum sensing by methyl gallate from Mangifera indica. Sci Rep 2023; 13:17942. [PMID: 37864035 PMCID: PMC10589227 DOI: 10.1038/s41598-023-44063-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/03/2023] [Indexed: 10/22/2023] Open
Abstract
Antipathogenic drugs are a potential source of therapeutics, particularly following the emergence of multiple drug-resistant pathogenic microorganisms in the last decade. The inhibition of quorum sensing (QS) is an advanced antipathogenic approach for suppression of bacterial virulence and dissemination. This study aimed to investigate the inhibitory effect of some Egyptian medicinal plants on the QS signaling system of Pseudomonas aeruginosa. Among the tested plants, Mangifera indica exhibited the highest quorum sensing inhibition (QSI) activity against Chromobacterium violaceum ATCC 12472. Four pure compounds were extracted and identified; of these, methyl gallate (MG) showed the most potent QSI. MG had a minimum inhibitory concentration (MIC) of 512 g/mL against P. aeruginosa strains PAO1, PA14, Pa21, Pa22, Pa23, Pa24, and PAO-JP2. The virulence factors of PAO1, PA14, Pa21, Pa22, Pa23, and Pa24 were significantly inhibited by MG at 1/4 and 1/2 sub-MICs without affecting bacterial viability. Computational insights were performed by docking the MG compound on the LasR receptor, and the QSI behavior of MG was found to be mediated by three hydrogen bonds: Trp60, Arg61, and Thr75. This study indicates the importance of M. indica and MG in the inhibition and modulation of QS and QS-related virulence factors in P. aeruginosa.
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Affiliation(s)
- Nourhan G Naga
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Ahmed A Zaki
- Pharmacognosy Department, Faculty of Pharmacy, Mansoura University, El Mansoura, Egypt
| | - Dalia E El-Badan
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
- Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut, Lebanon
| | - Heba S Rateb
- Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, Misr University for Science and Technology, Cairo, Egypt
| | - Khaled M Ghanem
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Mona I Shaaban
- Microbiology and Immunology Department, Faculty of Pharmacy, Mansoura University, El Mansoura, Egypt.
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Angusamy A, Balasubramanian V, Arunmurugan B, Arunachalam K, Issac Abraham SVP, Murugesan S, Krishnasamy B, Sundaram J, Arumugam VR. Anti-infective potential of plant-derived quorum sensing inhibitors against multi-drug resistant human and aquatic bacterial pathogens. World J Microbiol Biotechnol 2023; 39:147. [PMID: 37022521 DOI: 10.1007/s11274-023-03578-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/10/2023] [Indexed: 04/07/2023]
Abstract
The present study intended to decipher the anti-infective potential of bioactive phytocompounds, such as rosmarinic acid, morin, naringin, chlorogenic acid, and mangiferin, against aquatic and human bacterial pathogens using Artemia spp. nauplii and Caenorhabditis elegans as animal models, respectively. Initially, the test compounds were screened against the QS traits in Vibrio spp., such as bioluminescence production and biofilm formation. The test compounds effectively inhibited the bioluminescence in V. harveyi. Further, the confocal laser scanning microscopic analysis revealed that these natural compounds could efficiently reduce the clumping morphology, a characteristic biofilm formation in Vibrio spp., without inhibiting bacterial growth. The results of in vivo analysis showed a significant increase in the survival of Artemia spp. nauplii infected with Vibrio spp. upon exposure to these compounds. Moreover, the compounds used in this study were already proven and reported for their quorum sensing inhibitory efficacy against Pseudomonas aeruginosa. Hence, the anti-infective efficacy of these compounds against P. aeruginosa (PAO1) and its clinical isolates (AS1 and AS2) was studied using C. elegans as a live animal model system. The results of time-killing assay deciphered that rosmarinic acid and naringin are being the most effective ones in rescuing the animals from P. aeruginosa infection followed by morin, mangiferin, and chlorogenic acid. Further, the toxicity results revealed that these compounds did not show any lethal effect on C. elegans and Artemia spp. nauplii at the tested concentrations. In conclusion, the phytochemicals used in this study were effective in controlling the QS-regulated virulence traits in Vibrio spp. and P. aeruginosa infections in Artemia spp. nauplii and C. elegans animal model systems, respectively.
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Affiliation(s)
- Annapoorani Angusamy
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India
- Department of Zoology, University of Madras, Guindy Campus, Chennai, Tamil Nadu, 600 025, India
| | - Vigneshkumar Balasubramanian
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India
- Conservation of Coastal and Marine Resources (CMR) division, National Centre for Sustainable Coastal Management (NCSCM), Anna University campus, Tamil Nadu, 600 025, Chennai, India
| | - Balaji Arunmurugan
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India
| | - Kannapan Arunachalam
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India
- Department of Food Science and Technology, School of Agricultural Science, Shanghai Jiao Tong University, Shanghai, China
| | - Sybiya Vasantha Packiavathy Issac Abraham
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, 641 114, India
| | - Sivaranjani Murugesan
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India
- Vaccine and Infectious Disease Organization-International Vaccine Centre, Saskatoon, SK, Canada
| | | | - Janarthanan Sundaram
- Department of Zoology, University of Madras, Guindy Campus, Chennai, Tamil Nadu, 600 025, India
| | - Veera Ravi Arumugam
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, 630 003, India.
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3
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New insights into the antibacterial mode of action of quercetin against uropathogen Serratia marcescens in-vivo and in-vitro. Sci Rep 2022; 12:21912. [PMID: 36536034 PMCID: PMC9763402 DOI: 10.1038/s41598-022-26621-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 05/11/2022] [Indexed: 12/24/2022] Open
Abstract
In the course of a quest for therapeutic agents inhibiting uropathogens, the rise and universal blowout of antibiotic-resistant organisms is a wide problem. To overcome this matter, exploration of alternative antimicrobials is necessary. The antimicrobial potential of quercetin has been widely described against some pathogenic microorganisms, but to the best of our knowledge, no report exists against the pathogenicity of uropathogenic Serratia marcescens. Hence, the present study focused on the antibacterial mechanism of action of quercetin, a flavonoid against the uropathogen Serratia marcescens. Quercetin was evaluated for its anti-QS activity, and the attained outcomes showed that quercetin inhibited QS-mediated virulence factors such as biofilm formation, exopolysaccharides, swarming motility and prodigiosin in Serratia marcescens. The proposed mechanism of action of quercetin greatly influences cell metabolism and extracellular polysaccharide synthesis and damages the cell membrane, as revealed through global metabolome profiling. In vivo experiments revealed that treatment with quercetin prolonged the life expectancy of infected Caenorhabditis elegans and reduced the colonization of Serratia marcescens. Hence, the current study reveals the use of quercetin as a probable substitute for traditional antibiotics in the treatment of uropathogen infections driven by biofilms.
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Effect of (+) usnic Acid on Pigment Production in Bacteria. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.2.09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Antibiotic resistance is a universal problem in bacterial infections. Hence it gives high priority for new therapeutic methods to alternate conventional antibiotic treatment. Pigment production is one of the virulence characteristics of bacteria regulated by a quorum-sensing mechanism. Antiquorum sensing activities will not directly affect the viability of bacteria; however, they will reduce the pathogenicity of bacteria. Thereby it gives an adverse probability of the development of drug resistance. Aim of our study is to evaluate the activity of (+) usnic acid on pigment production in Pseudomonas aeruginosa MTCC 2453, Chromobacterium violaceum MTCC 2656 and Serratia marcescens MTCC 8708. (+) usnic acid eluted by column chromatography. Dimethyl sulphoxide (DMSO) was used as the solvent for (+) usnic acid. Antibacterial activity determined by Agar well diffusion and broth microdilution methods. Effect on pigment production was assessed by spectroscopy. (+) usnic acid showed accumulative inhibition as its concentration increases on pigment production by Pseudomonas aeruginosa MTCC 2453, Chromobacterium violaceum MTCC 2656 and Serratia marcescens MTCC 8708. The lowest concentrations of (+) usnic acid manifested 50% inhibition of pigment production was 122.67, 87.73 and 205.26 µg/ml respectively on above mentioned order in bacteria. The concentration of (+) usnic acid that showed pigment production inhibition did not hinder the growth of the bacteria, but it can reduce the virulence of the bacteria. This property can be used to resolve the drug resistance in bacteria. Further studies are required to check the action of (+) usnic acid on other virulence factors of the bacteria to prove the quorum quenching activity.
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Das S, Vishakha K, Banerjee S, Nag D, Ganguli A. Exploring the antibacterial, antibiofilm, and antivirulence activities of tea tree oil-containing nanoemulsion against carbapenem-resistant Serratia marcescens associated infections. BIOFOULING 2022; 38:100-117. [PMID: 35012385 DOI: 10.1080/08927014.2021.2022125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Carbapenem-resistant Serratia marcescens (CRE-S. marcescens) has recently emerged as an opportunistic human pathogen that causes various nosocomial and respiratory tract infections. The prognosis for CRE-S. marcescens-related infections is very poor and these infections are difficult to treat. This study investigated the synthesis of tea tree oil nanoemulsion (TTO-NE) and its impact on CRE-S. marcescens both in vitro and in vivo. TTO-NE was characterized by dynamic light scattering (DLS) and effectively eradicated bacterial planktonic and sessile forms, reduced bacterial virulence factors, and generated reactive oxygen species (ROS) in the bacterial cell. Notably, TTO-NE was efficient in reducing the colonization of CRE-S. marcescens in a C. elegans in vivo model. The data suggest that TTO-NE might be an excellent tool to combat infections associated with CRE-S. marcescens.
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Affiliation(s)
- Shatabdi Das
- Department of Microbiology, Techno India University, Kolkata, West Bengal, India
| | - Kumari Vishakha
- Department of Microbiology, Techno India University, Kolkata, West Bengal, India
| | - Satarupa Banerjee
- Department of Microbiology, Techno India University, Kolkata, West Bengal, India
| | - Debasish Nag
- Department of Biotechnology, University of Calcutta, Kolkata, West Bengal, India
| | - Arnab Ganguli
- Department of Microbiology, Techno India University, Kolkata, West Bengal, India
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6
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Qais FA, Ahmad I, Husain FM, Alomar SY, Ahmad N, Albalawi F, Alam P, Albalawi T. Interference of quorum sensing regulated bacterial virulence factors and biofilms by Plumbago zeylanica extract. Microsc Res Tech 2021; 84:3150-3160. [PMID: 34268833 DOI: 10.1002/jemt.23872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/30/2021] [Accepted: 07/04/2021] [Indexed: 12/23/2022]
Abstract
There has been tremendous spread of antimicrobial resistance globally, mainly due to the excessive and unnecessary use of antibiotics, making the situation alarming. This has created a need for the development of alternative strategies to selectively target the bacterial pathogenicity without exerting selection pressure for the development of antimicrobial resistance. Targeting quorum sensing (QS)-mediated virulence and biofilms by nontoxic natural products is gaining importance as new control strategy to combat the virulence and biofilms of pathogenic bacteria. In this study, the crude extract of Plumbago zeylanica was fractioned in different solvents using liquid-liquid partitioning to obtain the most bioactive fraction. The inhibitory effect of the bioactive extract of P. zeylanica on QS at sub-minimum inhibitory concentrations (MICs) was studied against Chromobacterium violaceum 12472, Pseudomonas aeruginosa PAO1, and Serratia marcescens MTCC 97. Biofilm inhibition was studied using microtiter plate assay, scanning electron microscopy, and confocal laser scanning microscopy. Major phytocompounds detected were cinnamaldehyde dimethyl acetal, plumbagin, asarone, 4-chromanol, phthalic acid, palmitic acid, ergost-5-en-3-ol, stigmasterol, and β-sitosterol. The violacein production in C. violaceum 12472 was reduced by >80% in the presence of P. zeylanica hexane fraction (PZHF; 200 μg/ml). The most active PZHF inhibited QS-mediated virulence factors of P. aeruginosa PAO1 such as pyocyanin, pyoverdin, rhamnolipid production, motility, etc., significantly at sub-MICs. Similarly, PZHF showed 59 to 76% inhibition of biofilm formation of above test pathogens. The findings revealed that active fraction of P. zeylanica was effective against the QS-regulated functions and biofilms development of Gram -ve pathogenic bacteria.
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Affiliation(s)
- Faizan Abul Qais
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, King Saud University, Riyadh, Saudi Arabia
| | - Suliman Y Alomar
- Department of Zoology, King Saud University, Riyadh, Saudi Arabia
| | - Naushad Ahmad
- Department of Chemistry, King Saud University, Riyadh, Saudi Arabia
| | - Fadwa Albalawi
- Department of Zoology, King Saud University, Riyadh, Saudi Arabia
| | - Pravej Alam
- Department of Biology, Prince Sattam bin Abdulaziz University, Alkharj, Saudi Arabia
| | - Thamer Albalawi
- Department of Biology, Prince Sattam bin Abdulaziz University, Alkharj, Saudi Arabia
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Rashiya N, Padmini N, Ajilda AAK, Prabakaran P, Durgadevi R, Veera Ravi A, Ghosh S, Sivakumar N, Selvakumar G. Inhibition of biofilm formation and quorum sensing mediated virulence in Pseudomonas aeruginosa by marine sponge symbiont Brevibacterium casei strain Alu 1. Microb Pathog 2020; 150:104693. [PMID: 33352215 DOI: 10.1016/j.micpath.2020.104693] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 12/05/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
The alternative antimicrobial strategies that mitigate the threat of antibiotic resistance is the quorum-sensing inhibition (QSI) mechanism, which targets autoinducer dependent virulence gene expression in bacterial pathogens. N-acyl homoserine lactone (AHL) acts as a key regulator in the production of virulence factors and biofilm formation in Pseudomonas aeruginosa PAO1 and violacein pigment production in Chromobacterium violaceum ATCC 12472. In the present study, the marine sponge Haliclona fibulata symbiont Brevibacterium casei strain Alu 1 showed potential QSI activity in a concentration-dependent manner (0.5-2% v/v) against the N-acyl homoserine lactone (AHL)-mediated violacein production in C. violaceum (75-95%), and biofilm formation (53-96%), protease (27-82%), pyocyanin (82-95%) and pyoverdin (29-38%) productions in P. aeruginosa. Further, the microscopic analyses validated the antibiofilm activity of the cell-free culture supernatant (CFCS) of B. casei against P. aeruginosa. Subsequently, the biofilm and pyoverdin inhibitory efficacy of the ethyl acetate extract of B. casei CFCS was assessed against P. aeruginosa. Further, the gas chromatography-mass spectrometry (GC-MS) analysis revealed the presence of variety of components in which diethyl phthalate was found to be a major active component. This phthalate ester, known as diethyl ester of phthalic acid, could act as a potential therapeutic agent for preventing bacterial biofilm and virulence associated infectious diseases.
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Affiliation(s)
- Nagasundaram Rashiya
- Department of Microbiology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - Nagarajan Padmini
- Department of Microbiology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | | | - Pandiyan Prabakaran
- Department of Biomedical Sciences, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - Ravindran Durgadevi
- Department of Biotechnology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - Arumugam Veera Ravi
- Department of Biotechnology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - Sougata Ghosh
- Department of Microbiology, School of Science, RK University, Rajkot, Gujarat, 360020, India
| | - Natesan Sivakumar
- School of Biotechnology, Madurai Kamaraj University, Madurai, Tamil Nadu, 625021, India
| | - Gopal Selvakumar
- Department of Microbiology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India.
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8
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Alam P, Alqahtani AS, Mabood Husain F, Tabish Rehman M, Alajmi MF, Noman OM, El Gamal AA, Al-Massarani SM, Shavez Khan M. Siphonocholin isolated from red sea sponge Siphonochalina siphonella attenuates quorum sensing controlled virulence and biofilm formation. Saudi Pharm J 2020; 28:1383-1391. [PMID: 33250645 PMCID: PMC7679466 DOI: 10.1016/j.jsps.2020.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 09/07/2020] [Indexed: 01/25/2023] Open
Abstract
Increasing incidence of multi-drug resistant bacterial pathogens, especially in clinical settings, has been developed into a grave health situation. The drug resistance problem demands the necessity for alternative unique therapeutic policies. One such tactic is targeting the quorum sensing (QS) controlled virulence and biofilm production. In this study, we evaluated a marine steroid Siphonocholin (Syph-1) isolated from Siphonochalina siphonella against Chromobacterium violaceum (CV) 12472, Pseudomonas aeruginosa (PAO1), Methicillin-resistant Staphylococcus aureus (MRSA) and Acinetobacter baumannii (BAA) for biofilm and pellicle formation inhibition, and anti-QS property. MIC of Syph-1 against MRSA, CV, PAO1 was found as 64 µg/mL and 256 µg/mL against BAA. At selected sub-MICs, Syph-1 significantly (P ≤ 0.05) decreased the production of QS regulated virulence functions of CV12472 (violacein) and PAO1 [elastase, total protease, pyocyanin, chitinase, exopolysaccharides, and swarming motility]. The Syph-1 significantly decreased (p = 0.005) biofilm formation ability of tested bacterial pathogens, at sub-MIC level (PAO1 > MRSA > CV > BAA) and pellicle formation in A. baumannii (at 128 µg/mL). Molecular docking and simulation results indicated that Siph-1 was bound at the active site of BfmR N-terminal domain with high affinity. This study highlights the anti-QS and anti-biofilm activity of Syph-1 against bacterial pathogens reflecting its broad spectrum anti-infective potential.
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Affiliation(s)
- Perwez Alam
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ali S Alqahtani
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed F Alajmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Omar M Noman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ali A El Gamal
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Shaza M Al-Massarani
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad Shavez Khan
- National Bureau of Agriculturally Important Microorganisms, Maunath Bhanjan, India
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Direct detection of small molecules using a nano-molecular imprinted polymer receptor and a quartz crystal resonator driven at a fixed frequency and amplitude. Biosens Bioelectron 2020; 158:112176. [DOI: 10.1016/j.bios.2020.112176] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/09/2020] [Accepted: 03/23/2020] [Indexed: 02/06/2023]
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Photodynamic inactivation diminishes quorum sensing-mediated virulence factor production and biofilm formation of Serratia marcescens. World J Microbiol Biotechnol 2019; 35:191. [DOI: 10.1007/s11274-019-2768-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 11/13/2019] [Indexed: 11/26/2022]
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Balasubramaniam B, Alexpandi R, Darjily DR. Exploration of the optimized parameters for bioactive prodigiosin mass production and its biomedical applications in vitro as well as in silico. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101385] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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Evaluation of Salmonella bongori derived biosurfactants and its extracellular protein separation by SDS-PAGE using petridishes: A simply modified approach. Int J Biol Macromol 2019; 140:156-167. [PMID: 31398404 DOI: 10.1016/j.ijbiomac.2019.08.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/02/2019] [Accepted: 08/05/2019] [Indexed: 11/23/2022]
Abstract
Presently, through the preliminary screening assays, the Salmonella bongori BH11 was found to be an effective biosurfactants (BSFs) producer. The secreted BSFs were extracted using methanol: chloroform and characterized through FTIR, TLC, HPLC and GCMS analyses. Further, the extracellular protein was extracted (TCA/acetone method), estimated (Lowry's method) and separated (standard and modified SDS-PAGE). Through the obtained characteristic FTIR peaks (1107.09cm-1), its content was presumed to be glycolipids and as rhamnose/rhamnolipids through the TLC-Rf value. GCMS revealed 6 compounds, in which Toluene (32%) and 5-(2-Thienyl) pentanoic acid (23%) are the major ones. The crude BSFs exhibited preponderant antibacterial effects on Staphylococcus aureus and Serratia marcescens. Also, it inhibited the biofilm formation of S. aureus, Pseudomonas aeruginosa, P. fluorescens and S. marcescens. Considerably, 76% mortality of IV instar larvae of Culex quinquefasciatus was recorded from BSFs, when compared to SDS. The presently followed protein separation technique using two petridishes might attract the attention of the researchers, as it would emerge as a standard procedure in future. This is the first report on the screening of BSFs from Salmonella bongori that showed antagonistic property, larvicidal potentials and the presently followed modified SDS-PAGE protein separation technique is a simple, reliable and cost effective one.
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Batista D, Costa R, Carvalho AP, Batista WR, Rua CPJ, de Oliveira L, Leomil L, Fróes AM, Thompson FL, Coutinho R, Dobretsov S. Environmental conditions affect activity and associated microorganisms of marine sponges. MARINE ENVIRONMENTAL RESEARCH 2018; 142:59-68. [PMID: 30274716 DOI: 10.1016/j.marenvres.2018.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 08/09/2018] [Accepted: 09/19/2018] [Indexed: 06/08/2023]
Abstract
Changes in environmental conditions can influence sponges and their holobionts. The present study investigated the effect of upwelling and anthropogenic pollution on the bioactivity of marine sponges, microbial communities and functional genes, and composition of their chemical compounds. The species Dysidea etheria, Darwinella sp., Hymeniacidon heliophila and Tedania ignis were collected from areas with distinct influence of upwelling and low anthropogenic impact and from areas without influence of upwelling but affected by sewage and the port. In most cases, the same sponge species collected from areas with distinct environmental conditions had a different chemical composition, antifouling activity, composition and diversity of associated microorganisms. Antimicrobial, quorum sensing inhibitory and anti-larval activities of sponge extracts were more pronounced in the area without upwelling showing higher level of anthropogenic pollution. This study suggests that upwelling and anthropogenic pollution affect the chemical activity and holobiome composition of sponges.
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Affiliation(s)
- Daniela Batista
- Instituto de Estudos do Mar Almirante Paulo Moreira, Rua Kioto no 253, Praia dos Anjos, Arraial do Cabo, RJ, Brazil.
| | - Rafaela Costa
- Instituto de Estudos do Mar Almirante Paulo Moreira, Rua Kioto no 253, Praia dos Anjos, Arraial do Cabo, RJ, Brazil
| | - Ana Polycarpa Carvalho
- Instituto de Estudos do Mar Almirante Paulo Moreira, Rua Kioto no 253, Praia dos Anjos, Arraial do Cabo, RJ, Brazil
| | - William Romão Batista
- Instituto de Estudos do Mar Almirante Paulo Moreira, Rua Kioto no 253, Praia dos Anjos, Arraial do Cabo, RJ, Brazil
| | - Cintia P J Rua
- Instituto de Biologia e SAGE-COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundão s/n, Rio de Janeiro, RJ, Brazil
| | - Louisi de Oliveira
- Instituto de Biologia e SAGE-COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundão s/n, Rio de Janeiro, RJ, Brazil
| | - Luciana Leomil
- Instituto de Biologia e SAGE-COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundão s/n, Rio de Janeiro, RJ, Brazil
| | - Adriana M Fróes
- Instituto de Biologia e SAGE-COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundão s/n, Rio de Janeiro, RJ, Brazil
| | - Fabiano L Thompson
- Instituto de Biologia e SAGE-COPPE, Universidade Federal do Rio de Janeiro, Ilha do Fundão s/n, Rio de Janeiro, RJ, Brazil
| | - Ricardo Coutinho
- Instituto de Estudos do Mar Almirante Paulo Moreira, Rua Kioto no 253, Praia dos Anjos, Arraial do Cabo, RJ, Brazil
| | - Sergey Dobretsov
- Marine Science and Fisheries Department, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud 123. PO Box 34, Muscat, Oman; Center of Excellence in Marine Biotechnology, Sultan Qaboos University, Al-Khoud 123. PO Box 50, Muscat, Oman.
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Husain FM, Ahmad I, Khan FI, Al-Shabib NA, Baig MH, Hussain A, Rehman MT, Alajmi MF, Lobb KA. Seed Extract of Psoralea corylifolia and Its Constituent Bakuchiol Impairs AHL-Based Quorum Sensing and Biofilm Formation in Food- and Human-Related Pathogens. Front Cell Infect Microbiol 2018; 8:351. [PMID: 30410871 PMCID: PMC6211212 DOI: 10.3389/fcimb.2018.00351] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 09/14/2018] [Indexed: 01/18/2023] Open
Abstract
The emergence of multi-drug resistance in pathogenic bacteria in clinical settings as well as food-borne infections has become a serious health concern. The problem of drug resistance necessitates the need for alternative novel therapeutic strategies to combat this menace. One such approach is targeting the quorum-sensing (QS) controlled virulence and biofilm formation. In this study, we first screened different fractions of Psoralea corylifolia (seed) for their anti-QS property in the Chromobacterium violaceum 12472 strain. The methanol fraction was found to be the most active fraction and was selected for further bioassays. At sub-inhibitory concentrations, the P. corylifolia methanol fraction (PCMF) reduced QS-regulated virulence functions in C. violaceum CVO26 (violacein); Pseudomonas aeruginosa (elastase, protease, pyocyanin, chitinase, exopolysaccharides (EPS), and swarming motility), A. hydrophila (protease, EPS), and Serratia marcescens (prodigiosin). Biofilm formation in all the test pathogens was reduced significantly (p ≤ 0.005) in a concentration-dependent manner. The β-galactosidase assay showed that the PCMF at 1,000 μg/ml downregulated las-controlled transcription in PAO1. In vivo studies with C. elegans demonstrated increased survival of the nematodes after treatment with the PCMF. Bakuchiol, a phytoconstituent of the extract, demonstrated significant inhibition of QS-regulated violacein production in C. violaceum and impaired biofilm formation in the test pathogens. The molecular docking results suggested that bakuchiol efficiently binds to the active pockets of LasR and RhlR, and the complexes were stabilized by several hydrophobic interactions. Additionally, the molecular dynamics simulation of LasR, LasR-bakuchiol, RhlR, and RhlR-bakuchiol complexes for 50 ns revealed that the binding of bakuchiol to LasR and RhlR was fairly stable. The study highlights the anti-infective potential of the PCMF and bakuchiol instead of bactericidal or bacteriostatic action, as the extract targets QS-controlled virulence and the biofilm.
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Affiliation(s)
- Fohad Mabood Husain
- Department of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.,Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh, India
| | - Iqbal Ahmad
- Department of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Faez Iqbal Khan
- Department of Chemistry, Rhodes University, Grahamstown, South Africa
| | - Nasser A Al-Shabib
- Department of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
| | | | - Afzal Hussain
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed F Alajmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Kevin A Lobb
- Department of Chemistry, Rhodes University, Grahamstown, South Africa
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Anti-infective potential of a quorum modulatory polyherbal extract (panchvalkal) against certain pathogenic bacteria. J Ayurveda Integr Med 2018; 11:336-343. [PMID: 33012317 PMCID: PMC7527823 DOI: 10.1016/j.jaim.2017.10.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/05/2017] [Accepted: 10/22/2017] [Indexed: 11/20/2022] Open
Abstract
Background In view of the gravity of the problem of antimicrobial resistance among pathogenic bacteria against conventional bactericidal agents, investigation on alternative approaches to combat bacterial infections is warranted. Objective Current study aimed at investigating anti-infective potential of a polyherbal ayurvedic formulation namely panchvalkal against three different pathogenic bacteria. Materials and methods The panchvalkal formulation available as Pentaphyte P5® was tested for its possible in vitro quorum-modulatory potential against Chromobacterium violaceum, Serratia marcescens, and Staphylococcus aureus through broth dilution assay. Invivo efficacy was demonstrated employing Caenorhabditis elegans as the model host for test pathogens. Results This formulation was found to exert quorum-modulatory effect on C. violaceum, S. marcescens, and S. aureus at 250–750 μg/ml. Besides altering production of the quorum sensing-regulated pigments in these bacteria, the test formulation also had in vitro effect on antibiotic susceptibility, catalase activity and haemolytic potential of the pathogens. Invivo assay confirmed the protective effect of this panchvalkal formulation on C. elegans, when challenged with the pathogenic bacteria. Repeated exposure of S. aureus to panchvalkal did not induce resistance in this bacterium. Conclusion To the best of our awareness, this the first report on quorum-modulatory potential of panchvalkal formulation, validating the anti-infective potential and moderate prebiotic property of this polyherbal preparation.
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Devi KR, Srinivasan S, Ravi AV. Inhibition of quorum sensing-mediated virulence in Serratia marcescens by Bacillus subtilis R-18. Microb Pathog 2018; 120:166-175. [DOI: 10.1016/j.micpath.2018.04.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 04/12/2018] [Accepted: 04/12/2018] [Indexed: 10/17/2022]
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Al-Shabib NA, Husain FM, Khan RA, Khan MS, Alam MZ, Ansari FA, Laeeq S, Zubair M, Shahzad SA, Khan JM, Alsalme A, Ahmad I. Interference of phosphane copper (I) complexes of β-carboline with quorum sensing regulated virulence functions and biofilm in foodborne pathogenic bacteria: A first report. Saudi J Biol Sci 2018; 26:308-316. [PMID: 31485170 PMCID: PMC6717094 DOI: 10.1016/j.sjbs.2018.04.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 03/01/2018] [Accepted: 04/15/2018] [Indexed: 11/19/2022] Open
Abstract
Foodborne pathogens are one of the major cause of food-related diseases and food poisoning. Bacterial biofilms and quorum sensing (QS) mechanism of cell–cell communication have also been found to be associated with several outbreaks of foodborne diseases and are great threat to food safety. Therefore, In the present study, we investigated the activity of three tetrahedrally coordinated copper(I) complexes against quorum sensing and biofilms of foodborne bacteria. All the three complexes demonstrated similar antimicrobial properties against the selected pathogens. Concentration below the MIC i.e. at sub-MICs all the three complexes interfered significantly with the quorum sensing regulated functions in C. violaceum (violacein), P. aeruginosa (elastase, pyocyanin and alginate production) and S. marcescens (prodigiosin). The complexes demonstrated potent broad-spectrum biofilm inhibition in Pseudomonas aeruginosa, E. coli, Chromobacterium violaceum, Serratia marcescens, Klebsiella pneumoniae and Listeria monocytogenes. Biofilm inhibition was visualized using SEM and CLSM images. Action of the copper(I) complexes on two key QS regulated functions contributing to biofilm formation i.e. EPS production and swarming motility was also studied and statistically significant reduction was recorded. These results could form the basis for development of safe anti-QS and anti-biofilm agents that can be utilized in the food industry as well as healthcare sector to prevent food-associated diseases.
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Affiliation(s)
- Nasser A Al-Shabib
- Department of Food Science and Nutrition, College of Food and Agriculture, King Saud University, Riyadh 11451, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, College of Food and Agriculture, King Saud University, Riyadh 11451, Saudi Arabia
| | - Rais Ahmad Khan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammad Shavez Khan
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Zubair Alam
- King Fahd Medical Research Centre, King AbdulAziz University, Jeddah, Saudi Arabia
| | - Firoz Ahmad Ansari
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
| | - Sameen Laeeq
- Department of Applied Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Zubair
- Department of Medical Microbiology, Faculty of Medicine, University of Tabuk, 71491, Saudi Arabia
| | - Syed Ali Shahzad
- Department of Food Science and Nutrition, College of Food and Agriculture, King Saud University, Riyadh 11451, Saudi Arabia
| | - Javed Masood Khan
- Department of Food Science and Nutrition, College of Food and Agriculture, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ali Alsalme
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
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Ravindran D, Ramanathan S, Arunachalam K, Jeyaraj G, Shunmugiah K, Arumugam V. Phytosynthesized silver nanoparticles as antiquorum sensing and antibiofilm agent against the nosocomial pathogen Serratia marcescens
: an in vitro
study. J Appl Microbiol 2018; 124:1425-1440. [DOI: 10.1111/jam.13728] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 01/13/2018] [Accepted: 02/02/2018] [Indexed: 12/16/2022]
Affiliation(s)
- D. Ravindran
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - S. Ramanathan
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - K. Arunachalam
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - G.P. Jeyaraj
- TIL Biosciences - Animal Health Division of Tablets (India) Limited; Jhaver Centre; Egmore Chennai Tamil Nadu India
| | - K.P. Shunmugiah
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
| | - V.R. Arumugam
- Department of Biotechnology; Science Campus; Alagappa University; Karaikudi Tamil Nadu India
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Chang H, Zhou J, Zhu X, Yu S, Chen L, Jin H, Cai Z. Strain identification and quorum sensing inhibition characterization of marine-derived Rhizobium sp. NAO1. ROYAL SOCIETY OPEN SCIENCE 2017; 4:170025. [PMID: 28405399 PMCID: PMC5383856 DOI: 10.1098/rsos.170025] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 02/23/2017] [Indexed: 06/07/2023]
Abstract
A novel strategy for combating pathogens is through the ongoing development and use of anti-quorum sensing (QS) treatments such as therapeutic bacteria or their anti-QS substances. Relatively little is known about the bacteria that inhabit the open ocean and of their potential anti-pathogenic attributes; thus, in an initiative to identify these types of therapeutic bacteria, planktonic microbes from the North Atlantic Ocean were collected, isolated, cultured and screened for anti-QS activity. Screening analysis identified one such strain, Rhizobium sp. NAO1. Extracts of Rhizobium sp. NAO1 were identified via ultra-performance liquid chromatography (UPLC) analysis. They were shown to contain N-acyl homoserine lactone (AHL)-based QS analogues (in particular, the N-butyryl homoserine lactone (C4-AHL) analogue) and could disrupt biofilm formation by Pseudomonas aeruginosa PAO1. QS inhibition was confirmed using confocal scanning laser microscopy and growth curves, and it was shown to occur in a dose-dependent manner without affecting bacterial growth. Secondary metabolites of Rhizobium sp. NAO1 inhibited PAO1 pathogenicity by downregulating AHL-mediated virulence factors such as elastase activity and siderophore production. Furthermore, as a result of biofilm structure damage, the secondary metabolite products of Rhizobium sp. NAO1 significantly increased the sensitivity of PAO1 to aminoglycoside antibiotics. Our results demonstrated that Rhizobium sp. strain NAO1 has the ability to disrupt P. aeruginosa PAO1 biofilm architecture, in addition to attenuating P. aeruginosa PAO1 virulence factor production and pathogenicity. Therefore, the newly identified ocean-derived Rhizobium sp. NAO1 has the potential to serve as a QS inhibitor and may be a new microbial resource for drug development.
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Affiliation(s)
- Hong Chang
- School of Life Science, Tsinghua University, Beijing 100081, People's Republic of China
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
| | - Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
| | - Xiaoshan Zhu
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
| | - Shenchen Yu
- School of Life Science, Tsinghua University, Beijing 100081, People's Republic of China
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
| | - Lu Chen
- School of Life Science, Tsinghua University, Beijing 100081, People's Republic of China
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
| | - Hui Jin
- School of Life Science, Tsinghua University, Beijing 100081, People's Republic of China
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
| | - Zhonghua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Shenzhen, Guangdong Province 518055, People's Republic of China
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20
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Ding L, Cao J, Duan Y, Li J, Yang Y, Yang G, Zhou Y. Proteomic and physiological responses of Arabidopsis thaliana exposed to salinity stress and N-acyl-homoserine lactone. PHYSIOLOGIA PLANTARUM 2016; 158:414-434. [PMID: 27265884 DOI: 10.1111/ppl.12476] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/05/2016] [Accepted: 05/20/2016] [Indexed: 06/05/2023]
Abstract
To evaluate the alleviating action of exogenous N-acyl-homoserine lactones (AHLs) on NaCl toxicity, morphological, physiological and proteomic changes were investigated in Arabidopsis thaliana seedlings. Salinity stress decreased growth parameters, increased malondialdehyde (MDA) contents and antioxidant enzymes such as superoxide dismutase (SOD), guaiacol peroxidase (POD) and catalase activities. Application of lower concentration of AHL had a relieving effect on Arabidopsis seedlings under salinity stress which dramatically decreased MDA content, and increased growth parameters as well as SOD and POD activities. Total proteins were extracted from the control, NaCl-, AHL- and NaCl + AHL-treated seedlings and were separated using two-dimensional gel electrophoresis. A total of 127 protein spots showed different expression compared with the control. Mass spectrometry analysis allowed the identification of 97 proteins involved in multiple pathways, i.e. defense/stress/detoxification, photosynthesis, protein metabolism, signal transduction, transcription, cell wall biogenesis, metabolisms of carbon, lipid, energy, sulfur, nucleotide and sugar. These results suggest that defense/stress response, metabolism and energy, signal transduction and regulation, protein metabolism and transcription-related proteins may be particularly subjected to regulation in salt stressed Arabidopsis seedlings, when treated with AHL and that this regulation lead to improved salt tolerance and plant growth. Overall, this study provides insight to the effect of AHL on salinity stress for the first time, and also sheds light on overview of the molecular mechanism of AHL-regulated plant growth promotion and salt resistance.
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Affiliation(s)
- Lina Ding
- Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, China
| | - Jun Cao
- Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, China
| | - Yunfei Duan
- Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, China
| | - Jun Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yang Yang
- Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, China
| | - Guoxing Yang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yang Zhou
- Institute of Life Sciences, Jiangsu University, Zhenjiang, 212013, China
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Hema M, Balasubramanian S, Princy SA. Meddling Vibrio cholerae Murmurs: A Neoteric Advancement in Cholera Research. Indian J Microbiol 2015; 55:121-30. [PMID: 25805898 DOI: 10.1007/s12088-015-0520-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 02/17/2015] [Indexed: 12/28/2022] Open
Abstract
Cholera, a known diarrheal disease is associated with various risk factors like hypovolemic shock, rice watery stools, and death in developing countries. The overuse of antibiotics to treat cholera imposed a selective pressure for the emergence and spread of multi-drug resistant Vibrio cholerae strains. The failure of conventional antimicrobial therapy urged the researchers to find an alternative therapy that could meddle the cholera murmurs (Quorum Sensing). It seems to effectively overcome the conventional cholera therapies in parallel to decrease the morbidity and mortality rate in the developing countries. The paramount objective of this review essentially focuses on the different Quorum Sensing (QS) regulatory switches governing virulence and pathogenicity of Vibrio cholerae. This review also provides an insight into the plausible QS targets that could be exploited to bring about a breakthrough to the prevailing cholera therapy.
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Affiliation(s)
- M Hema
- Quorum Sensing Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA University, Thanjavur, 613 402 Tamil Nadu India
| | - Srikkanth Balasubramanian
- Quorum Sensing Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA University, Thanjavur, 613 402 Tamil Nadu India
| | - S Adline Princy
- Quorum Sensing Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA University, Thanjavur, 613 402 Tamil Nadu India
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22
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Padmavathi AR, Abinaya B, Pandian SK. Phenol, 2,4-bis(1,1-dimethylethyl) of marine bacterial origin inhibits quorum sensing mediated biofilm formation in the uropathogen Serratia marcescens. BIOFOULING 2014; 30:1111-22. [PMID: 25377484 DOI: 10.1080/08927014.2014.972386] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Intercellular communication in bacteria (quorum sensing, QS) is an important phenomenon in disease dissemination and pathogenesis, which controls biofilm formation also. This study reports the anti-QS and anti-biofilm efficacy of seaweed Gracilaria gracilis associated Vibrio alginolyticus G16 against Serratia marcescens. Purification and mass spectrometric analysis revealed the active principle as phenol, 2,4-bis(1,1-dimethylethyl) [PD]. PD affected the QS regulated virulence factor production in S. marcescens and resulted in a significant (p < 0.05) reduction in biofilm (85%), protease (41.9%), haemolysin (69.9%), lipase (84.3%), prodigiosin (84.5%) and extracellular polysaccharide (84.62%) secretion without hampering growth, as evidenced by XTT [2,3-bis (2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide] assay. qPCR analysis confirmed the down-regulation of the fimA, fimC, flhD and bsmA genes involved in biofilm formation. Apart from biofilm inhibition and disruption, PD increased the susceptibility of S. marcescens to gentamicin when administered synergistically, which opens another avenue for combinatorial therapy where PD can be used to enhance the efficacy of conventional antibiotics.
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23
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Kalia VC, Wood TK, Kumar P. Evolution of resistance to quorum-sensing inhibitors. MICROBIAL ECOLOGY 2014; 68:13-23. [PMID: 24194099 PMCID: PMC4012018 DOI: 10.1007/s00248-013-0316-y] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 10/14/2013] [Indexed: 05/23/2023]
Abstract
The major cause of mortality and morbidity in human beings is bacterial infection. Bacteria have developed resistance to most of the antibiotics primarily due to large-scale and "indiscriminate" usage. The need is to develop novel mechanisms to treat bacterial infections. The expression of pathogenicity during bacterial infections is mediated by a cell density-dependent phenomenon known as quorum sensing (QS). A wide array of QS systems (QSS) is operative in expressing the virulent behavior of bacterial pathogens. Each QSS may be mediated largely by a few major signals along with others produced in minuscule quantities. Efforts to target signal molecules and their receptors have proved effective in alleviating the virulent behavior of such pathogenic bacteria. These QS inhibitors (QSIs) have been reported to be effective in influencing the pathogenicity without affecting bacterial growth. However, evidence is accumulating that bacteria may develop resistance to QSIs. The big question is whether QSIs will meet the same fate as antibiotics.
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Affiliation(s)
- Vipin C Kalia
- Microbial Biotechnology and Genomics, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi, 110007, India,
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Padmavathi AR, Pandian SK. Antibiofilm activity of biosurfactant producing coral associated bacteria isolated from gulf of mannar. Indian J Microbiol 2014; 54:376-82. [PMID: 25320434 DOI: 10.1007/s12088-014-0474-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Accepted: 05/15/2014] [Indexed: 12/28/2022] Open
Abstract
Coral Associated Bacteria (CAB) (N = 22) isolated from the mucus of the coral Acropora digitifera were screened for biosurfactants using classical screening methods; hemolysis test, lipase production, oil displacement, drop collapse test and emulsifying activity. Six CAB (U7, U9, U10, U13, U14, and U16) were found to produce biosurfactants and were identified by 16S ribosomal RNA gene sequencing as Providencia rettgeri, Psychrobacter sp., Bacillus flexus, Bacillus anthracis, Psychrobacter sp., and Bacillus pumilus respectively. Their cell surface hydrophobicity was determined by Microbial adhesion to hydrocarbon assay and the biosurfactants produced were extracted and characterized by Fourier Transform Infrared spectroscopy. Since the biosurfactants are known for their surface modifying capabilities, antibiofilm activity of positive isolates was evaluated against biofilm forming Pseudomonas aeruginosa ATCC10145. Stability of the active principle exhibiting antibiofilm activity was tested through various temperature treatments ranging from 60 to 100 °C and Proteinase K treatment. CAB isolates U7 and U9 exhibited stable antibiofilm activity even after exposure to higher temperatures which is promising for the development of novel antifouling agents for diverse industrial applications. Further, this is the first report on biosurfactant production by a coral symbiont.
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Gui Z, Wang H, Ding T, Zhu W, Zhuang X, Chu W. Azithromycin Reduces the Production of α-hemolysin and Biofilm Formation in Staphylococcus aureus. Indian J Microbiol 2013; 54:114-7. [PMID: 24426177 DOI: 10.1007/s12088-013-0438-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 11/09/2013] [Indexed: 11/26/2022] Open
Abstract
Staphylococcus aureus causes a broad range of life-threatening diseases in humans. This bacterium produces a large number of extracellular virulence factors that are closely associated with specific diseases which are controlled by quorum sensing. In this study, we show that azithromycin was active against methicillin-resistant Staphylococcus aureus (MRSA) strains with MICs ranged from 32 to 64 μg/mL. Azithromycin at subinhibitory concentration, markedly reduced the production of α-hemolysin at (1/16MIC, 1/8MIC) and biofilm formation at (1/16MIC, 1/8MIC), respectively. The results indicated that sub-inhibitory concentrations of azithromycin decreased the production of α-hemolysin and biofilm formation in MRSA in a dose-dependent manner. Therefore, azithromycin may be useful in the treatment of α-hemolysin producing and biofilm formation MRSA infections.
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Affiliation(s)
- Zhihong Gui
- Lishui People's Hospital, Lishui, 323000 China
| | - Huafu Wang
- Lishui People's Hospital, Lishui, 323000 China
| | - Ting Ding
- Lishui People's Hospital, Lishui, 323000 China
| | - Wei Zhu
- Department of Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009 China
| | - Xiyi Zhuang
- Department of Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009 China
| | - Weihua Chu
- Department of Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009 China
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Durai S, Vigneshwari L, Balamurugan K. Caenorhabditis elegans-based in vivo screening of bioactives from marine sponge-associated bacteria against Vibrio alginolyticus. J Appl Microbiol 2013; 115:1329-42. [PMID: 24034129 DOI: 10.1111/jam.12335] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/10/2013] [Accepted: 08/21/2013] [Indexed: 01/17/2023]
Abstract
AIM To establish Caenorhabditis elegans based in vivo method for screening bioactives from marine sponge associated bacteria (SAB) against Vibrio species. METHODS AND RESULTS About 256 SAB isolates were screened for their ability to rescue C. elegans infected with Vibrio species. The chloroform extract of the positive isolate was subjected to column fractionation and purity of the active fraction was analysed using HPLC. Further, the components were elucidated using GC/MS. The active fraction was tested for its in vivo rescue activity, antibacterial and anti-QS activity. In vivo colonization reduction and biofilm inhibition efficiency were assessed using GFP-tagged V. alginolyticus using confocal laser scanning microscopy (CLSM). The ability of the active fraction in modulating expression of V. alginolyticus quorum sensing (QS) regulators luxT and lafK was measured using real-time PCR. The results indicated that the chloroform extract of SAB4.2 displayed significant rescue activity against V. alginolyticus by inhibiting the QS pathway. HPLC analysis of the active fraction revealed a single major peak and GC/MS analysis suggested Pyrrolo[1,2-a]pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl) as the major constituent. The potent bacterial isolate was identified as Alcaligenes faecalis. CONCLUSIONS In vivo screening using C. elegans identified a marine isolate that inhibits the virulence of V. alginolyticus by interrupting the QS pathway. SIGNIFICANCE AND IMPACT OF THE STUDY The study provides a C. elegans based in vivo screening method for identifying bioactives from natural resources by overcoming the disadvantages of traditional in vitro plate assays.
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Affiliation(s)
- S Durai
- Department of Biotechnology, Alagappa University, Karaikudi, India
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Annapoorani A, Kalpana B, Musthafa KS, Pandian SK, Ravi AV. Antipathogenic potential of Rhizophora spp. against the quorum sensing mediated virulence factors production in drug resistant Pseudomonas aeruginosa. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2013; 20:956-963. [PMID: 23746758 DOI: 10.1016/j.phymed.2013.04.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 03/14/2013] [Accepted: 04/19/2013] [Indexed: 06/02/2023]
Abstract
Quorum sensing (QS) is a process of cell-cell communication mechanism occurs between the bacterial cells through the secretary signal molecules. This QS mechanism has been shown to control over the expression of various genes responsible for the production of virulence factors in several bacterial pathogens. Hence, the present study was intended to evaluate the antipathogenic potential of mangrove trees of the genus Rhizophora against the QS dependent virulence factors production in Pseudomonas aeruginosa PAO1, clinical isolates CI-I (GU447237) and CI-II (GU447238). The methanol extract of Rhizophora apiculata and R. mucronata (1 mg/ml) showed significant inhibition against QS dependent virulence factors production such as LasA protease, LasB elastase, total protease, pyocyanin pigment production and biofilm formation in P. aeruginosa PAO1, CI-I and CI-II. This study for the first time, reports the quorum sensing inhibitory (QSI) potential of Rhizophora spp. against P. aeruginosa infections.
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Affiliation(s)
- Angusamy Annapoorani
- Department of Biotechnology, Alagappa University, Karaikudi 630003, Tamil Nadu, India
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Musthafa KS, Sahu SK, Ravi AV, Kathiresan K. Anti-quorum sensing potential of the mangrove Rhizophora annamalayana. World J Microbiol Biotechnol 2013; 29:1851-8. [PMID: 23591758 DOI: 10.1007/s11274-013-1347-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 04/04/2013] [Indexed: 01/26/2023]
Abstract
The present study was carried out to assess the anti-quorum sensing (anti-QS) activity of bark extract obtained from the mangrove plant Rhizophora annamalayana Kathir. against Gram-negative bacteria. In microtitre plate assay, the bark extract at a concentration of 1 mg/ml inhibited the QS-dependent violacein production in Chromobacterium violaceum ATCC 12472. Further, the QS-dependent bioluminescence production in the aquatic bacterial pathogen Vibrio harveyi MTCC 3438 was also reduced to the level of 99 % when treated with the same concentration of the extract. Gas chromatography-mass spectrum analysis identified the presence of seven different chemical constituents, 1H-purin-6-amine, cycloheptasiloxane, cyclooctasiloxane, cyclononasiloxane, cyclononasiloxane octadecamethyl, cyclodecasiloxane eicosamethyl and 1,1,1,5,7,7,7-heptamethyl-3,3-bis(trimethylsiloxy)tetrasiloxane. The molecular docking analysis of the identified compounds revealed that the compounds cyclononasiloxane octadecamethyl and cyclodecasiloxane eicosamethyl exhibited the best docking energy with the QS receptors of C. violaceum and V. harveyi with that of the natural ligand N -hexanoyl- L -homoserine lactone (C6-HSL) and furanosyl borate diester (AI-2). Similarly, another compound 1,1,1,5,7,7,7-heptamethyl-3,3-bis(trimethylsiloxy)tetrasiloxane showed best docking energy only against C6-HSL. Thus, the results of the present study divulge the activity of R. annamalayana bark extract to interfere with bacterial QS.
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Affiliation(s)
- Khadar Syed Musthafa
- Centre of Advanced Study in Marine Biology, Annamalai University, Porto novo, 608 502, Tamil Nadu, India
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Chu W, Liu Y, Jiang Y, Zhu W, Zhuang X. Production of N-acyl Homoserine Lactones and Virulence Factors of Waterborne Aeromonas hydrophila. Indian J Microbiol 2013; 53:264-8. [PMID: 24426120 DOI: 10.1007/s12088-013-0381-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 02/25/2013] [Indexed: 12/01/2022] Open
Abstract
Aeromonads are inhabitants of aquatic ecosystems and are described as being involved in intestinal disturbances and other infections. The purpose of this study was to investigate the production of N-acyl-homoserine lactone (AHL) signal molecules and some virulence factors, including hemolysins, proteases, extracellular nucleases production and cytotoxicity by waterborne Aeromonas hydrophila. A total of 24 strains isolated from fresh-water or diseased fish were used in the study. The majority A.hydrophila strains produce two AHL molecules (21/24), one is N-butanoyl homoserine lactone (BHL), and the other is N-hexanoyl homoserine lactone (HHL) according to thin-layer chromatography analysis. Among the virulence factors tested, more than 83 % of the isolates produced β haemolysin when inoculated on sheep blood agar, only 50 % of the isolates displayed DNase activity, 75 % of the isolates shown proteolytic activity on skimmed milk plate, and cytotoxic activity was detected in 20 of 24 of the isolates. The strains producing AHLs possessed one or more virulence factors. In conclusion, the production of quorum sensing signal molecules is common among the strains that we examined, and there seems to some relationships between quorum sensing signal production and virulence factors in A. hydrophila.
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Affiliation(s)
- Weihua Chu
- Department of Microbiology, School of Life Science & Technology, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, People's Republic of China
| | - Yongwang Liu
- College of Veterinary Medicine, Nanjing Agricultural University, 210095 Nanjing, People's Republic of China
| | - Yan Jiang
- Jiangsu Entry-Exit Inspection and Quarantine Buearu, 210001 Nanjing, People's Republic of China
| | - Wei Zhu
- Department of Microbiology, School of Life Science & Technology, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, People's Republic of China
| | - Xiyi Zhuang
- Department of Microbiology, School of Life Science & Technology, China Pharmaceutical University, No. 24 Tongjiaxiang Road, 210009 Nanjing, People's Republic of China
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Annapoorani A, Umamageswaran V, Parameswari R, Pandian SK, Ravi AV. Computational discovery of putative quorum sensing inhibitors against LasR and RhlR receptor proteins of Pseudomonas aeruginosa. J Comput Aided Mol Des 2012; 26:1067-77. [DOI: 10.1007/s10822-012-9599-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 08/30/2012] [Indexed: 11/28/2022]
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