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Khan MA, Celik I, Khan HM, Shahid M, Shahzad A, Kumar S, Ahmed B. Antibiofilm and anti-quorum sensing activity of Psidium guajava L. leaf extract: In vitro and in silico approach. PLoS One 2023; 18:e0295524. [PMID: 38113217 PMCID: PMC10729950 DOI: 10.1371/journal.pone.0295524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 11/21/2023] [Indexed: 12/21/2023] Open
Abstract
The quorum sensing mechanism relies on the detection and response to chemical signals, termed autoinducers, which regulate the synthesis of virulence factors including toxins, enzymes, and biofilms. Emerging therapeutic strategies for infection control encompass approaches that attenuate quorum-sensing systems. In this study, we evaluated the antibacterial, anti-quorum sensing, and anti-biofilm activities of Psidium guajava L. methanolic leaf extracts (PGME). Minimum Inhibitory Concentrations (MICs) of PGME were determined as 500 μg/ml for C. violaceum and 1000 μg/ml for P. aeruginosa PAO1. Significantly, even at sub-MIC concentrations, PGME exhibited noteworthy anti-quorum sensing properties, as evidenced by concentration-dependent inhibition of pigment production in C. violaceum 12742. Furthermore, PGME effectively suppressed quorum-sensing controlled virulence factors in P. aeruginosa PAO1, including biofilm formation, pyoverdin, pyocyanin, and rhamnolipid production, with concentration-dependent inhibitory effects. Phytochemical analysis utilizing GC-MS revealed the presence of compounds such as alpha-copaene, caryophyllene, and nerolidol. In-silico docking studies indicated a plausible mechanism for the observed anti-quorum sensing activity, involving favorable binding and interactions with QS-receptors, including RhlR, CviR', LasI, and LasR proteins. These interactions were found to potentially disrupt QS pathways through suppression of AHL production and receptor protein blockade. Collectively, our findings propose PGME as a promising candidate for the treatment of bacterial infections. Its attributes that mitigate biofilm development and impede quorum-sensing mechanisms highlight its potential therapeutic value.
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Affiliation(s)
- Mo Ahamad Khan
- Department of Microbiology, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Ismail Celik
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Erciyes University, Kayseri, Turkey
| | - Haris M. Khan
- Department of Microbiology, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Mohammad Shahid
- Department of Microbiology, Immunology and Infectious Diseases, College of Medicine and Medical Science, Arabian Gulf University, Manama, Kingdom of Bahrain
| | - Anwar Shahzad
- Department of Botany, Faculty of Life Science, Aligarh Muslim University, Aligarh, India
| | - Sachin Kumar
- Department of Microbiology, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Bilal Ahmed
- Agricultural and Biological Engineering, Purdue University, West Lafayette, IN, United States of America
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2
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Paliya BS, Sharma VK, Tuohy MG, Singh HB, Koffas M, Benhida R, Tiwari BK, Kalaskar DM, Singh BN, Gupta VK. Bacterial glycobiotechnology: A biosynthetic route for the production of biopharmaceutical glycans. Biotechnol Adv 2023; 67:108180. [PMID: 37236328 DOI: 10.1016/j.biotechadv.2023.108180] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/16/2023] [Accepted: 05/21/2023] [Indexed: 05/28/2023]
Abstract
The recent advancement in the human glycome and progress in the development of an inclusive network of glycosylation pathways allow the incorporation of suitable machinery for protein modification in non-natural hosts and explore novel opportunities for constructing next-generation tailored glycans and glycoconjugates. Fortunately, the emerging field of bacterial metabolic engineering has enabled the production of tailored biopolymers by harnessing living microbial factories (prokaryotes) as whole-cell biocatalysts. Microbial catalysts offer sophisticated means to develop a variety of valuable polysaccharides in bulk quantities for practical clinical applications. Glycans production through this technique is highly efficient and cost-effective, as it does not involve expensive initial materials. Metabolic glycoengineering primarily focuses on utilizing small metabolite molecules to alter biosynthetic pathways, optimization of cellular processes for glycan and glycoconjugate production, characteristic to a specific organism to produce interest tailored glycans in microbes, using preferably cheap and simple substrate. However, metabolic engineering faces one of the unique challenges, such as the need for an enzyme to catalyze desired substrate conversion when natural native substrates are already present. So, in metabolic engineering, such challenges are evaluated, and different strategies have been developed to overcome them. The generation of glycans and glycoconjugates via metabolic intermediate pathways can still be supported by glycol modeling achieved through metabolic engineering. It is evident that modern glycans engineering requires adoption of improved strain engineering strategies for creating competent glycoprotein expression platforms in bacterial hosts, in the future. These strategies include logically designing and introducing orthogonal glycosylation pathways, identifying metabolic engineering targets at the genome level, and strategically improving pathway performance (for example, through genetic modification of pathway enzymes). Here, we highlight current strategies, applications, and recent progress in metabolic engineering for producing high-value tailored glycans and their applications in biotherapeutics and diagnostics.
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Affiliation(s)
- Balwant S Paliya
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Vivek K Sharma
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Maria G Tuohy
- Biochemistry, School of Biological and Chemical Sciences, College of Science & Engineering, University of Galway (Ollscoil na Gaillimhe), University Road, Galway City, Ireland
| | - Harikesh B Singh
- Department of Biotechnology, GLA University, Mathura 281406, Uttar Pradesh, India
| | - Mattheos Koffas
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Rachid Benhida
- Institut de Chimie de Nice, UMR7272, Université Côte d'Azur, Nice, France; Mohamed VI Polytechnic University, Lot 660, Hay Moulay Rachid 43150, Benguerir, Morocco
| | | | - Deepak M Kalaskar
- UCL Division of Surgery and Interventional Science, Royal Free Hospital Campus, University College London, Rowland Hill Street, NW3 2PF, UK
| | - Brahma N Singh
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India.
| | - Vijai K Gupta
- Biorefining and Advanced Materials Research Centre, SRUC, Barony Campus, Parkgate, Dumfries DG1 3NE, United Kingdom.
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Beyond the Risk of Biofilms: An Up-and-Coming Battleground of Bacterial Life and Potential Antibiofilm Agents. Life (Basel) 2023; 13:life13020503. [PMID: 36836860 PMCID: PMC9959329 DOI: 10.3390/life13020503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/15/2023] Open
Abstract
Microbial pathogens and their virulence factors like biofilms are one of the major factors which influence the disease process and its outcomes. Biofilms are a complex microbial network that is produced by bacteria on any devices and/or biotic surfaces to escape harsh environmental conditions and antimicrobial effects. Due to the natural protective nature of biofilms and the associated multidrug resistance issues, researchers evaluated several natural anti-biofilm agents, including bacteriophages and their derivatives, honey, plant extracts, and surfactants for better destruction of biofilm and planktonic cells. This review discusses some of these natural agents that are being put into practice to prevent biofilm formation. In addition, we highlight bacterial biofilm formation and the mechanism of resistance to antibiotics.
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4
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Natural Medicine a Promising Candidate in Combating Microbial Biofilm. Antibiotics (Basel) 2023; 12:antibiotics12020299. [PMID: 36830210 PMCID: PMC9952808 DOI: 10.3390/antibiotics12020299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/14/2023] [Accepted: 01/19/2023] [Indexed: 02/05/2023] Open
Abstract
Studies on biofilm-related infections are gaining prominence owing to their involvement in most clinical infections and seriously threatening global public health. A biofilm is a natural form of bacterial growth ubiquitous in ecological niches, considered to be a generic survival mechanism adopted by both pathogenic and non-pathogenic microorganisms and entailing heterogeneous cell development within the matrix. In the ecological niche, quorum sensing is a communication channel that is crucial to developing biofilms. Biofilm formation leads to increased resistance to unfavourable ecological effects, comprising resistance to antibiotics and antimicrobial agents. Biofilms are frequently combated with modern conventional medicines such as antibiotics, but at present, they are considered inadequate for the treatment of multi-drug resistance; therefore, it is vital to discover some new antimicrobial agents that can prevent the production and growth of biofilm, in addition to minimizing the side effects of such therapies. In the search for some alternative and safe therapies, natural plant-derived phytomedicines are gaining popularity among the research community. Phytomedicines are natural agents derived from natural plants. These plant-derived agents may include flavonoids, terpenoids, lectins, alkaloids, polypeptides, polyacetylenes, phenolics, and essential oils. Since they are natural agents, they cause minimal side effects, so could be administered with dose flexibility. It is vital to discover some new antimicrobial agents that can control the production and growth of biofilms. This review summarizes and analyzes the efficacy characteristics and corresponding mechanisms of natural-product-based antibiofilm agents, i.e., phytochemicals, biosurfactants, antimicrobial peptides, and their sources, along with their mechanism, quorum sensing signalling pathways, disrupting extracellular matrix adhesion. The review also provides some other strategies to inhibit biofilm-related illness. The prepared list of newly discovered natural antibiofilm agents could help in devising novel strategies for biofilm-associated infections.
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5
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Zafar F, Shahid M, Fatima H, Riaz M, Anjum F, Mushtaq Z, Zia S, Jahangir MM, Aslam MA. Antibiofilm and Quorum Sensing Inhibition (QSI) Potential of Lagerstroemia speciosa Leaves Extract. Dose Response 2022; 20:15593258221132080. [PMID: 36262717 PMCID: PMC9575460 DOI: 10.1177/15593258221132080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 08/15/2022] [Accepted: 09/22/2022] [Indexed: 11/17/2022] Open
Abstract
Disruption of quorum sensing pathway of pathogenic microbes is considered as
novel approach to fight against infectious diseases. The current study was
planned to evaluate the antibiofilm and quorum sensing inhibitory potential of
Lagerstroemia speciosa. Antibacterial and antibiofilm
potential of L. speciosa extracts was determined through agar
well diffusion and crystal violet assay against sinusitis isolates, that is,
Staphylococcus aureus, Enterococcus faecalis, Proteus mirabilis, and
Klebsiella pneumoniae, while quorum sensing inhibition efficacy of
L. speciosa extracts was determined through violacein
inhibition assay using Chromobacterium pseudoviolaceum as
bacterial model. The methanolic extract of L.
speciosa presented the highest antimicrobial activity against
E. faecalis and antibiofilm activity against K.
pneumoniae (77.42 ± 1.51%), while
n-hexane extract was found to be least active against all
tested bacterial strains. Quorum sensing inhibition activity of
L. speciosa extracts against C.
pseudoviolaceum showed significant dose-dependent inhibition in
violacein production by different concentrations of methanolic extract.
Furthermore, none of the extracts of L. speciosa showed any
hemolytic activity against human RBCs and hold considerable thrombolytic
potential in comparison to streptokinase (75.9 ± .46%). In conclusion, findings
suggest that L. speciosa leaves are excellent source of
phytochemicals with potent antibiofilm and quorum sensing inhibition
potential.
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Affiliation(s)
- Farzana Zafar
- Department of Biochemistry,
University
of Agriculture, Faisalabad,
Pakistan
| | - Muhammad Shahid
- Department of Biochemistry,
University
of Agriculture, Faisalabad,
Pakistan,Muhammad Shahid, Department of
Biochemistry, University of Agriculture, Faisalabad 38000, Pakistan.
| | - Hina Fatima
- Department of Biochemistry,
University
of Agriculture, Faisalabad,
Pakistan,Faculty of Science and Technology,
Department of Basic and Applied Chemistry, University of Central
Punjab, Lahore, Pakistan
| | - Muhammad Riaz
- Department of Allied Health
Sciences, University
of Sargodha, Sargodha, Pakistan
| | - Fozia Anjum
- Government College University
Faisalabad, Faisalabad, Pakistan
| | - Zahid Mushtaq
- Department of Biochemistry,
University
of Agriculture, Faisalabad,
Pakistan
| | - Saadiya Zia
- Department of Biochemistry,
University
of Agriculture, Faisalabad,
Pakistan
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Gu P, Ma Q, Zhao S, Gao J, Li C, Zhou H, Jiang S, Li Q. Application of quorum sensing system in microbial synthesis of valuable chemicals: a mini-review. World J Microbiol Biotechnol 2022; 38:192. [PMID: 35978255 DOI: 10.1007/s11274-022-03382-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 08/08/2022] [Indexed: 10/15/2022]
Abstract
With advantages of low substrates cost, high optical purity of end products and environmentally friendly fermentation process, microbial production of valuable chemicals grow rapidly. Compared with static microbial strain engineering strategies, such as gene deletion, overexpression and mutation, dynamic pathway regulation is a new approach that balances cellular growth and chemical production. Quorum sensing is a natural microbial communication system responsible for cell-density-related cell behaviors. Accordingly, quorum sensing systems can be employed to achieve dynamic regulation in microorganisms without the need for manual intervention or the use of chemical inducers. In this review, natural quorum sensing systems are firstly summarized. Then, recent progress in using quorum sensing circuits in the field of metabolic engineering is highlighted. The current application challenges of quorum sensing systems and future perspectives in microbial synthesis of chemicals are also discussed.
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Affiliation(s)
- Pengfei Gu
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China.
| | - Qianqian Ma
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China
| | - Shuo Zhao
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China
| | - Juan Gao
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China
| | - Changtao Li
- RZBC GROUP CO., LTD., Rizhao, 276800, Shandong, China
| | - Hao Zhou
- RZBC GROUP CO., LTD., Rizhao, 276800, Shandong, China
| | | | - Qiang Li
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China
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7
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An Overview of Biofilm Formation-Combating Strategies and Mechanisms of Action of Antibiofilm Agents. LIFE (BASEL, SWITZERLAND) 2022; 12:life12081110. [PMID: 35892912 PMCID: PMC9394423 DOI: 10.3390/life12081110] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 11/19/2022]
Abstract
Biofilm formation on surfaces via microbial colonization causes infections and has become a major health issue globally. The biofilm lifestyle provides resistance to environmental stresses and antimicrobial therapies. Biofilms can cause several chronic conditions, and effective treatment has become a challenge due to increased antimicrobial resistance. Antibiotics available for treating biofilm-associated infections are generally not very effective and require high doses that may cause toxicity in the host. Therefore, it is essential to study and develop efficient anti-biofilm strategies that can significantly reduce the rate of biofilm-associated healthcare problems. In this context, some effective combating strategies with potential anti-biofilm agents, including plant extracts, peptides, enzymes, lantibiotics, chelating agents, biosurfactants, polysaccharides, organic, inorganic, and metal nanoparticles, etc., have been reviewed to overcome biofilm-associated healthcare problems. From their extensive literature survey, it can be concluded that these molecules with considerable structural alterations might be applied to the treatment of biofilm-associated infections, by evaluating their significant delivery to the target site of the host. To design effective anti-biofilm molecules, it must be assured that the minimum inhibitory concentrations of these anti-biofilm compounds can eradicate biofilm-associated infections without causing toxic effects at a significant rate.
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8
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Kumar S, Paliya BS, Singh BN. Superior inhibition of virulence and biofilm formation of Pseudomonas aeruginosa PAO1 by phyto-synthesized silver nanoparticles through anti-quorum sensing activity. Microb Pathog 2022; 170:105678. [PMID: 35820580 DOI: 10.1016/j.micpath.2022.105678] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/23/2022] [Accepted: 07/08/2022] [Indexed: 11/18/2022]
Abstract
Quorum sensing (QS)-regulated bacterial biofilm formation is a crucial issue in causing resistance against existing antibiotics. There is a considerable necessity to disrupt the interrelationship between bacterial QS, virulence, and biofilm formation. Disabling QS could be a novel tactic of great clinical importance. Here, we biosynthesized silver nanoparticles (Ka-AgNPs) using the aqueous leaf extract of Koelreuteria paniculata as a reducing and capping agents. The UV-Vis spectroscopy confirmed the synthesis of Ka-AgNPs as a characterization peak observed at 420 nm. TEM image revealed the spherical shape distribution of Ka-AgNPs with average particle size of 30.0 ± 5 nm. The anti-QS activity of Ka-AgNPs was tested against a bio-indicator bacterium Chromobacterium violaceum 12472 and a multi-drug resistant model strain of Pseudomonas aeruginosa (PAO1). The results demonstrated that the Ka-AgNPs superiorly inhibited QS-regulated virulence factors in PAO1 without affecting cell viability compared to chemically synthesized AgNPs (Cs-AgNPs). The Ka-AgNPs effectively suppressed the formation of biofilm of PAO1. RT-PCR results revealed that the Ka-AgNPs inhibited the expression of QS-regulated virulence genes of PAO1. These results suggest that the phyto-synthesized AgNPs could be used as promising anti-infective agents for treating drug-resistant P. aeruginosa.
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Affiliation(s)
- Sanket Kumar
- Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India; Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India
| | - Balwant S Paliya
- Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India
| | - Brahma N Singh
- Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India; Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India.
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9
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Arbab S, Ullah H, Wang W, Zhang J. Antimicrobial drug resistance against Escherichia coli and its harmful effect on animal health. Vet Med Sci 2022; 8:1780-1786. [PMID: 35608149 PMCID: PMC9297802 DOI: 10.1002/vms3.825] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Multidrug resistance among pathogenic bacteria is imperilling the worth of antibiotic infection, which has become an emerging problem, which previously transformed the veterinary sciences. Since its discovery, many antibiotics have been effective in treating bacterial infections in animals. Escherichia coli, a bacterium, is one of the reservoirs of antibiotic resistance genes in a community. The current use of antibiotics and demographic factors usually increase multidrug resistance. Genetically, the continuous adoption of environmental changes by E. coli allows it to acquire many multidrug resistance. During the host's life, antimicrobial resistance rarely poses a threat to the E. coli strain and pressure, similar to that of a flexible animal lower intestine. In this review, we describe the E. coli antibiotic drug–resistance mechanism driving transmission, the causes of transmission and the harmful effects on animal health.
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Affiliation(s)
- Safia Arbab
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Hanif Ullah
- West China School of Nursing, Sichuan University, Chengdu, China
| | - Weiwei Wang
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jiyu Zhang
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
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10
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Lactiplantibacillus plantarum-Derived Biosurfactant Attenuates Quorum Sensing-Mediated Virulence and Biofilm Formation in Pseudomonas aeruginosa and Chromobacterium violaceum. Microorganisms 2022; 10:microorganisms10051026. [PMID: 35630468 PMCID: PMC9145448 DOI: 10.3390/microorganisms10051026] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 12/10/2022] Open
Abstract
Quorum sensing (QS) controls the expression of diverse biological traits in bacteria, including virulence factors. Any natural bioactive compound that disables the QS system is being considered as a potential strategy to prevent bacterial infection. Various biological activities of biosurfactants have been observed, including anti-QS effects. In the present study, we investigated the effectiveness of a biosurfactant derived from Lactiplantibacillus plantarum on QS-regulated virulence factors and biofilm formation in Pseudomonas aeruginosa and Chromobacterium violaceum. The structural analogues of the crude biosurfactant were identified using gas chromatography–mass spectrometry (GC–MS). Moreover, the inhibitory prospects of identified structural analogues were assessed with QS-associated CviR, LasA, and LasI ligands via in silico molecular docking analysis. An L. plantarum-derived biosurfactant showed a promising dose-dependent interference with the production of both violacein and acyl homoserine lactone (AHL) in C. violaceum. In P. aeruginosa, at a sub-MIC concentration (2.5 mg/mL), QS inhibitory activity was also demonstrated by reduction in pyocyanin (66.63%), total protease (60.95%), LasA (56.62%), and LasB elastase (51.33%) activity. The swarming motility and exopolysaccharide production were also significantly reduced in both C. violaceum (61.13%) and P. aeruginosa (53.11%). When compared with control, biofilm formation was also considerably reduced in C. violaceum (68.12%) and P. aeruginosa (59.80%). A GC–MS analysis confirmed that the crude biosurfactant derived from L. plantarum was a glycolipid type. Among all, n-hexadecanoic acid, oleic acid, and 1H-indene,1-hexadecyl-2,3-dihydro had a high affinity for CviR, LasI, and LasA, respectively. Thus, our findings suggest that the crude biosurfactant of L. plantarum can be used as a new anti-QS/antibiofilm agent against biofilm-associated pathogenesis, which warrants further investigation to uncover its therapeutic efficacy.
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11
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Khan J, Tarar SM, Gul I, Nawaz U, Arshad M. Challenges of antibiotic resistance biofilms and potential combating strategies: a review. 3 Biotech 2021; 11:169. [PMID: 33816046 DOI: 10.1007/s13205-021-02707-w] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 02/23/2021] [Indexed: 02/07/2023] Open
Abstract
In this modern era, medicine is facing many alarming challenges. Among different challenges, antibiotics are gaining importance. Recent years have seen unprecedented increase in knowledge and understanding of various factors that are root cause of the spread and development of resistance in microbes against antibiotics. The infection results in the formation of microbial colonies which are termed as biofilms. However, it has been found that a multiple factors contribute in the formation of antimicrobial resistance. Due to higher dose of Minimum Bactericidal Concentration (MBC) as well as of Minimum Inhibitory Concentration (MIC), a large batch of antibiotics available today are of no use as they are ineffective against infections. Therefore, to control infections, there is dire need to adopt alternative treatment for biofilm infection other than antibiotics. This review highlights the latest techniques that are being used to cure the menace of biofilm infections. A wide range of mechanisms has been examined with particular attention towards avenues which can be proved fruitful in the treatment of biofilms. Besides, newer strategies, i.e., matrix centered are also discussed as alternative therapeutic techniques including modulating microbial metabolism, matrix degrading enzyme, photodynamic therapy, natural compounds quorum sensing and nanotechnology which are being used to disrupt extra polymeric substances (EPS) matrix of desired bacterial biofilms.
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Affiliation(s)
- Javairia Khan
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Sumbal Mudassar Tarar
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Iram Gul
- Department of Earth and Environmental Sciences, Hazara University, Mansehra, Pakistan
| | - Uzam Nawaz
- Department of Statistics, The Women University Multan, Multan, Pakistan
| | - Muhammad Arshad
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan
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12
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Su T, Qiu Y, Hua X, Ye B, Luo H, Liu D, Qu P, Qiu Z. Novel Opportunity to Reverse Antibiotic Resistance: To Explore Traditional Chinese Medicine With Potential Activity Against Antibiotics-Resistance Bacteria. Front Microbiol 2020; 11:610070. [PMID: 33414777 PMCID: PMC7782309 DOI: 10.3389/fmicb.2020.610070] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/07/2020] [Indexed: 12/13/2022] Open
Abstract
Antibiotic resistance is becoming significantly prominent and urgent in clinical practice with the increasing and wide application of antibacterial drugs. However, developing and synthesizing new antimicrobial drugs is costly and time-consuming. Recently, researchers shifted their sights to traditional Chinese medicine (TCM). Here, we summarized the inhibitory mechanism of TCM herbs and their active ingredients on bacteria, discussed the regulatory mechanism of TCM on antibiotic-resistant bacteria, and revealed preclinical results of TCM herbs and their active components against antibiotic-resistant bacteria in mouse models. Those data suggest that TCM herbs and their effective constituents exhibit potential blockage ability on antibiotic-resistant bacteria, providing novel therapeutic ideas for reversing antibiotic resistance.
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Affiliation(s)
- Ting Su
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Ye Qiu
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Xuesi Hua
- College of Literature, Science and Arts University of Michigan, Ann Arbor, MI, United States
| | - Bi Ye
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Haoming Luo
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Da Liu
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Peng Qu
- National Cancer Institute, Frederick, MD, United States
| | - Zhidong Qiu
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
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13
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Tits J, Cammue BPA, Thevissen K. Combination Therapy to Treat Fungal Biofilm-Based Infections. Int J Mol Sci 2020; 21:ijms21228873. [PMID: 33238622 PMCID: PMC7700406 DOI: 10.3390/ijms21228873] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 12/21/2022] Open
Abstract
An increasing number of people is affected by fungal biofilm-based infections, which are resistant to the majority of currently-used antifungal drugs. Such infections are often caused by species from the genera Candida, Aspergillus or Cryptococcus. Only a few antifungal drugs, including echinocandins and liposomal formulations of amphotericin B, are available to treat such biofilm-based fungal infections. This review discusses combination therapy as a novel antibiofilm strategy. More specifically, in vitro methods to discover new antibiofilm combinations will be discussed. Furthermore, an overview of the main modes of action of promising antibiofilm combination treatments will be provided as this knowledge may facilitate the optimization of existing antibiofilm combinations or the development of new ones with a similar mode of action.
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Wijesooriya LI, Waidyathilake D. Antimicrobial Properties of Nonantibiotic Agents for Effective Treatment of Localized Wound Infections: A Minireview. INT J LOW EXTR WOUND 2020; 21:207-218. [PMID: 32746677 DOI: 10.1177/1534734620939748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Wounds present serious health problems in humans and animals. Importantly, if left untreated, wounds invariably lead to long-term morbidity. The inappropriate use and costs of antibiotics place significant challenges globally and affect the health budgets of many countries. Though some antibiotics are administered systemically, treatment of localized infections, in particular, chronic wound infections, does not need such therapy-this would minimize development of antibiotic resistance. Of these measures, nanoparticles of silver, ZnO, and gold seem to give promising results against common wound pathogens while having few limitations. Chemical components of essential oils, which are extracted from different plants, have been shown to act against common wound pathogens. Plant extracts have shown different mechanisms in biofilm elimination. Chlorhexidine and chlorine derivatives act as wound antiseptics. Attempts with biological agents such as maggots have also been shown to provide anti-infective as well as mechanical removal of wound debris. Honey, including those obtained from bees, has a wide coverage against wound pathogens. Glycerin and hypertonic saline are anti-infective through the concentration-dependent killing of pathogens. Hyperbaric oxygen acts against many wound pathogens, in particular anaerobes. This review is focused on nonantibiotic attempts for the cure of localized infections, in particular, chronic wounds with common wound pathogens.
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15
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Asif M, Imran M. Effect of Quorum Sensing Inhibitor Agents against Pseudomonas aeruginosa. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162020020041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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16
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Mostafa I, Abbas HA, Ashour ML, Yasri A, El-Shazly AM, Wink M, Sobeh M. Polyphenols from Salix tetrasperma Impair Virulence and Inhibit Quorum Sensing of Pseudomonas aeruginosa. Molecules 2020; 25:E1341. [PMID: 32187997 PMCID: PMC7146421 DOI: 10.3390/molecules25061341] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/10/2020] [Accepted: 03/13/2020] [Indexed: 11/16/2022] Open
Abstract
Bacterial resistance represents one of the emerging obstacles in plants, animals, and humans that impairs treatment with antibacterial agents. Targeting of the bacterial quorum sensing system is one of the strategies to overcome this problem. Recently, research has been focused on natural and food components which can function as quorum sensing inhibitors. In this study, a methanol extract from Salix tetrasperma stem bark was phytochemically profiled by LC-MS analysis. This resulted in the identification of 38 secondary metabolites with (epi)catechin-(epi)catechin, epicatechin, tremulacin, salicortin, and trichocarposide as the major constituents. The extracts of both stem bark and the previously profiled flower of S. tetrasperma were tested for anti-quorum sensing activity in a common and widely distributed pathogen Pseudomonas aeruginosa. The natural products inhibited swimming and swarming motilities, as well as proteolytic and hemolytic activities in a dose-dependent manner. Molecular docking of the constituents from both extracts against the quorum sensing controlling systems Lasl/LasR, rhll/rhlR, and PQS/MvfR showed that epicatechin, (epi)catechin-(epi)catechin, p-hydroxy benzoyl galloyl glucose, p-hydroxy benzoyl protocatechuic acid glucose, and caffeoylmalic acid could be the main active components. This study supports the importance of secondary metabolites, especially polyphenols, as quorum sensing inhibitors.
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Affiliation(s)
- Islam Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Hisham A Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Mohamed L Ashour
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Abdelaziz Yasri
- AgroBioSciences Research Division, Mohammed VI Polytechnic University, Lot 660-Hay MoulayRachid, Ben-Guerir 43150, Morocco
| | - Assem M El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, 69120 Heidelberg, Germany
| | - Mansour Sobeh
- AgroBioSciences Research Division, Mohammed VI Polytechnic University, Lot 660-Hay MoulayRachid, Ben-Guerir 43150, Morocco
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, 69120 Heidelberg, Germany
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17
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Asif M, Imran M. Quorum Sensing Inhibition: Current Advances of the Natural Antimicrobial Agents. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162019060049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Srivastava N, Tiwari S, Bhandari K, Biswal AK, Rawat AKS. Novel derivatives of plant monomeric phenolics: act as inhibitors of bacterial cell-to-cell communication. Microb Pathog 2019; 141:103856. [PMID: 31794818 DOI: 10.1016/j.micpath.2019.103856] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 11/05/2019] [Indexed: 12/01/2022]
Abstract
The aim of the present study was to synthesize novel active Anti-Quorum sensing derivatives from secondary metabolites viz. Gallic acid, Protocatechuic acid and Vanillic acid present in the plant Bergenia ciliata. Efficacy of all synthesized derivatives have been evaluated on the formation of bacterial biofilm and inhibition of cell-to-cell communication. Anti-Quorum Sensing activity and biofilm formation of all synthesized compounds was measured on biomonitor strain Chrobacterium violaceum, ATCC 12472 using standard paper disk-diffusion assay and quantification of violacein pigment. Among all derivatives, five derivatives 3,4,5-Trihydroxy-benzoic acid methyl ester (9a), 3,4-Dihydroxy-benzoic acid methyl ester (10a), 3,4,5-Tris-(2,4-dichloro-benzyloxy)-benzoic acid methyl ester (12), 3,4,5-Tris-(2,5-dichloro-benzyloxy)-benzoic acid methyl ester (13) and 4-(2,4-Dichloro-benzyloxy)-3-methoxy-benzoic acid methyl ester (15) has shown Anti-Quorum Sensing activity by inhibiting violacein pigment production and biofilm formation without interfering with its growth. The inhibitory effects in violacein pigment production were: positive control (C-30) 72%, (9a), (10a) 47.2%, (12) 27.3%, (13) 40.1% and (15) 22.7% at the concentration of 1 mg/mL and biofilm percent inhibition were found (C-30) 64% (9a) 46.2%, (10a) 40.3%, (12) 18.4%, (13) 35.2%, and (15) 17.3% when compared with the untreated control. Results reveal that synthesized derivatives seem to be good compounds for inhibition and formation of biofilm and AHL-mediated Quorum-sensing mechanism. The present article highlights the importance of derivatives derived from secondary metabolites as potent drug for biofilm formation and inhibition of cell-to-cell communication.
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Affiliation(s)
- Nishi Srivastava
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India, Tel.: 91 522-2297816, 9450601959, fax: 91 522 2207219.
| | - Surabhi Tiwari
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India, Tel.: 91 522-2297816, 9450601959, fax: 91 522 2207219
| | - Kalpna Bhandari
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India, Tel.: 91 522-2297816, 9450601959, fax: 91 522 2207219
| | - Ajaya K Biswal
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA-30602, USA; Complex Carbohydrate Research Center, University of Georgia, Athens, GA-30602, USA; Center for Bioenergy Innovation, ORNL, 1 Bethel Valley Road, Oak Ridge, TN, 37831, USA
| | - A K S Rawat
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India, Tel.: 91 522-2297816, 9450601959, fax: 91 522 2207219.
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19
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Galdino ACM, de Oliveira MP, Ramalho TC, de Castro AA, Branquinha MH, Santos ALS. Anti-Virulence Strategy against the Multidrug-Resistant Bacterial Pathogen Pseudomonas aeruginosa: Pseudolysin (Elastase B) as a Potential Druggable Target. Curr Protein Pept Sci 2019; 20:471-487. [PMID: 30727891 DOI: 10.2174/1389203720666190207100415] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 01/26/2019] [Accepted: 01/31/2019] [Indexed: 11/22/2022]
Abstract
Pseudomonas aeruginosa is a non-fermentative, gram-negative bacterium that is one of the most common pathogens responsible for hospital-acquired infections worldwide. The management of the infections caused by P. aeruginosa represents a huge challenge in the healthcare settings due to the increased emergence of resistant isolates, some of them resistant to all the currently available antimicrobials, which results in elevated morbimortality rates. Consequently, the development of new therapeutic strategies against multidrug-resistant P. aeruginosa is urgent and needful. P. aeruginosa is wellrecognized for its extreme genetic versatility and its ability to produce a lush variety of virulence factors. In this context, pseudolysin (or elastase B) outstands as a pivotal virulence attribute during the infectious process, playing multifunctional roles in different aspects of the pathogen-host interaction. This protein is a 33-kDa neutral zinc-dependent metallopeptidase that is the most abundant peptidase found in pseudomonal secretions, which contributes to the invasiveness of P. aeruginosa due to its ability to cleave several extracellular matrix proteins and to disrupt the basolateral intercellular junctions present in the host tissues. Moreover, pseudolysin makes P. aeruginosa able to overcome host defenses by the hydrolysis of many immunologically relevant molecules, including antibodies and complement components. The attenuation of this striking peptidase therefore emerges as an alternative and promising antivirulence strategy to combat antibiotic-refractory infections caused by P. aeruginosa. The anti-virulence approach aims to disarm the P. aeruginosa infective arsenal by inhibiting the expression/activity of bacterial virulence factors in order to reduce the invasiveness of P. aeruginosa, avoiding the emergence of resistance since the proliferation is not affected. This review summarizes the most relevant features of pseudolysin and highlights this enzyme as a promising target for the development of new anti-virulence compounds.
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Affiliation(s)
- Anna Clara M Galdino
- Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Programa de Pós-Graduação em Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Matheus P de Oliveira
- Department of Integrative Biology and Physiology, University of California, Los Angeles, CA, United States
| | - Teodorico C Ramalho
- Departamento de Quimica, Universidade Federal de Lavras, Minas Gerais, Brazil
| | | | - Marta H Branquinha
- Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - André L S Santos
- Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Goes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Programa de Pós-Graduação em Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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20
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Quorum sensing in food spoilage and natural-based strategies for its inhibition. Food Res Int 2019; 127:108754. [PMID: 31882100 DOI: 10.1016/j.foodres.2019.108754] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/27/2019] [Accepted: 10/13/2019] [Indexed: 10/25/2022]
Abstract
Food can harbor a variety of microorganisms including spoilage and pathogenic bacteria. Many bacterial processes, including production of degrading enzymes, virulence factors, and biofilm formation are known to depend on cell density through a process called quorum sensing (QS), in which cells communicate by synthesizing, detecting and reacting to small diffusible signaling molecules - autoinducers (AI). The disruption of QS could decisively contribute to control the expression of many harmful bacterial phenotypes. Several quorum sensing inhibitors (QSI) have been extensively studied, being many of them of natural origin. This review provides an analysis on the role of QS in food spoilage and biofilm formation within the food industry. QSI from natural sources are also reviewed towards their putative future applications to prolong shelf life of food products and decrease foodborne pathogenicity.
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21
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Prateeksha, Barik SK, Singh BN. Nanoemulsion-loaded hydrogel coatings for inhibition of bacterial virulence and biofilm formation on solid surfaces. Sci Rep 2019; 9:6520. [PMID: 31019240 PMCID: PMC6482171 DOI: 10.1038/s41598-019-43016-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 04/15/2019] [Indexed: 12/02/2022] Open
Abstract
The indiscriminate use of antibiotics has led to the emergence of drug-resistant bacteria which has become one of the biggest challenges of the twenty-first century for the researchers to combat and in turn search for novel targets which could lead to the development of effective and sustainable therapies. Inhibition of biofilm formation and virulence of bacterial pathogens is an emerging approach to address the challenges related to bacterial infections. To suppress the virulence and biofilm formation by Escherichia coli O157:H7 (ECOH), we developed stable nanoemulsion (NE) of Gaultheria fragrantissima Wall. essential oil’s (EO) bioactive compounds, viz., eugenol (E-NE) and methyl salicylate (MS-NE) that showed significantly higher anti-biofilm and anti-virulence activities as compared to eugenol and methyl salicylate without affecting ECOH planktonic cell growth. Transcriptional analysis showed that E-NE and MS-NE reduced the expression of genes, including curli, type I fimbriae, Shiga-like toxins, quorum sensing, and ler-controlled toxins, which are needed for biofilm formation, pathogenicity, and attachment. E-NE and MS-NE loaded hydrogel coatings showed superior anti-biofilm activity against ECOH on glass, plastic and meat surfaces as compared to eugenol and methyl salicylate loaded coatings. Conclusively, NE-loaded hydrogel coatings could be used in combating ECOH infection on solid surfaces through anti-biofilm and anti-virulence strategies.
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Affiliation(s)
- Prateeksha
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India
| | - Saroj Kanta Barik
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India.
| | - Brahma Nand Singh
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, India.
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22
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Al-Yousef HM, Sheikh IA. β-Sitosterol derived compound from onion husks non-polar fraction reduces quorum sensing controlled virulence and biofilm production. Saudi Pharm J 2019; 27:664-672. [PMID: 31297021 PMCID: PMC6598451 DOI: 10.1016/j.jsps.2019.04.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 04/01/2019] [Indexed: 11/06/2022] Open
Abstract
Quorum sensing is an important regulatory factor of P. aeruginosa virulence induction such as BF, motility, formations of proteases, pyocyanin, and some toxins. The aim of the current study is to detect the effect of the pet.ether extract from onion husk and compound drive from it on quorum sensing and virulence formations of P. aeruginosa. Quorum sensing inhibiting effect of the pet.ether extract of onion husk and a compound drive from it, was evaluated by C. violaceum reporter using dilution method as well as an antioxidant by using DPPH. The efficacious of: Quorum sensing inhibiting on pet.ether fraction and compound derived from it, were investigated for their activities toward biofilm and pyocyanin synthesis as well as motility from P. aeruginosa. The pet.ether fraction and compound derived from it of onion husk exhibited potent antimicrobial, antioxidant and Quorum sensing inhibiting effects. The pet.ether fraction and compound derived from it possesses significant reduction on pyocyanin and biofilm induction of P. aeruginosa. Moreover, they significantly inhibited swimming motilities of P. aeruginosa. For the first time, our study showed the medical importance of Allium cepa L. as antimicrobial, antioxidant as well as Quorum sensing inhibiting and virulence suppressors of P. aeruginosa. Thus, these might emphasized on Allium cepa L as a natural source for attenuating toxins of the Pseudomonas.
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Affiliation(s)
- Hanan M Al-Yousef
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ishfaq Ahmad Sheikh
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
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23
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Sharma S, Gopu V, Sivasankar C, Shetty PH. Hydrocinnamic acid produced byEnterobacter xiangfangensisimpairs AHL-based quorum sensing and biofilm formation inPseudomonas aeruginosa. RSC Adv 2019; 9:28678-28687. [PMID: 35529628 PMCID: PMC9071187 DOI: 10.1039/c9ra05725k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/05/2019] [Indexed: 11/21/2022] Open
Abstract
Hydrocinnamic acid interacts with LasR receptor averts the autoinducer biding to modulate the expression of quorum sensing mediated phenotypes that strengthens the speculation of hydrocinnamic acid acts as a competitive inhibitor for autoinducer molecule.
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Affiliation(s)
- Shivangi Sharma
- Department of Food Science and Technology
- Pondicherry University
- Pondicherry 605014
- India
| | - Venkadesaperumal Gopu
- Department of Food Science and Technology
- Pondicherry University
- Pondicherry 605014
- India
| | - Chandran Sivasankar
- Department of Food Science and Technology
- Pondicherry University
- Pondicherry 605014
- India
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24
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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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25
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Samanta S, Singh BR, Adholeya A. Intracellular Synthesis of Gold Nanoparticles Using an Ectomycorrhizal Strain EM-1083 of Laccaria fraterna and Its Nanoanti-quorum Sensing Potential Against Pseudomonas aeruginosa. Indian J Microbiol 2017; 57:448-460. [PMID: 29151646 PMCID: PMC5671422 DOI: 10.1007/s12088-017-0662-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 07/14/2017] [Indexed: 10/18/2022] Open
Abstract
In this research work different shapes and sizes of gold nanoparticles (AuNPs) were synthesized through an intracellular biogenic approach, exploiting the chloroauric acid reducing and Au0 stabilizing potential of Laccaria fraterna EM-1083 mycelia. The intracellularly synthesized AuNPs exhibits anti-quorum sensing inhibitory potential against Pseudomonas aeruginosa. The synthesized AuNPs were characterized using UV-visible spectroscopy; transmission electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The characterization proved that the successful synthesis of highly stable crystalline AuNPs with various shapes. Here we tested inhibitory activity of AuNPs on QS-regulated biofilm development and pyocyanin production traits of P. aeruginosa. The qualitative and quantitative data demonstrated that AuNPs significantly inhibited the biofilm formation and pyocyanin production. In summary, our results signify the future use of intracellularly synthesized AuNPs in P. aeruginosa mediated diseases.
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Affiliation(s)
- Sreeparna Samanta
- TERI-Deakin Nano Biotechnology Centre, The Energy and Resources Institute (TERI), Teri Gram, Gwal Pahari, Gurgoan, 122001 India
| | - Braj Raj Singh
- TERI-Deakin Nano Biotechnology Centre, The Energy and Resources Institute (TERI), Teri Gram, Gwal Pahari, Gurgoan, 122001 India
| | - Alok Adholeya
- TERI-Deakin Nano Biotechnology Centre, The Energy and Resources Institute (TERI), Teri Gram, Gwal Pahari, Gurgoan, 122001 India
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26
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Al-Yousef HM, Ahmed AF, Al-Shabib NA, Laeeq S, Khan RA, Rehman MT, Alsalme A, Al-Ajmi MF, Khan MS, Husain FM. Onion Peel Ethylacetate Fraction and Its Derived Constituent Quercetin 4'- O-β-D Glucopyranoside Attenuates Quorum Sensing Regulated Virulence and Biofilm Formation. Front Microbiol 2017; 8:1675. [PMID: 28928721 PMCID: PMC5591837 DOI: 10.3389/fmicb.2017.01675] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 08/18/2017] [Indexed: 12/04/2022] Open
Abstract
The resistance and pathogenesis of bacteria could be related to their ability to sense and respond to population density, termed quorum sensing (QS). Inhibition of the QS system is considered as a novel strategy for the development of antipathogenic agents, especially for combating drug-resistant bacterial infections. In the present study, the anti-QS activity of Onion peel ethylacetate fraction (ONE) was tested against Chromobacterium violaceum CV12472 and Pseudomonas aeruginosa PAO1. ONE inhibit the QS-mediated virulence factors production such as violacein in C. violaceum and elastase, pyocyanin in P. aeruginosa. Further, the treatment with sub-MICs of ONE significantly inhibited the QS-mediated biofilm formation, EPS (Extracellular polymeric substances) production and swarming motility. Further, quercetin 4′-O-β-D glucopyranoside (QGP) was isolated from ONE and its anti-QS potential was confirmed after observing significant inhibition of QS-controlled virulence factors such as violacein, elastase, pyocyanin and biofilm formation in test pathogens. Molecular docking analysis predicted that QGP should be able to bind at the active sites of Vfr and LasR, and if so blocks the entry of active sites in Vfr and LasR.
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Affiliation(s)
- Hanan M Al-Yousef
- Department of Pharmacognosy, College of Pharmacy, King Saud UniversityRiyadh, Saudi Arabia
| | - Atallah F Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud UniversityRiyadh, Saudi Arabia
| | - Nasser A Al-Shabib
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Sameen Laeeq
- Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim UniversityAligarh, India
| | - Rais A Khan
- Department of Chemistry, College of Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Md T Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud UniversityRiyadh, Saudi Arabia
| | - Ali Alsalme
- Department of Chemistry, College of Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Mohamed F Al-Ajmi
- Department of Pharmacognosy, College of Pharmacy, King Saud UniversityRiyadh, Saudi Arabia
| | - Mohammad S Khan
- Department of Agricultural Microbiology, Aligarh Muslim UniversityAligarh, India
| | - Fohad M Husain
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud UniversityRiyadh, Saudi Arabia
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27
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Singh A, Gupta R, Tandon S, Pandey R. Thyme Oil Reduces Biofilm Formation and Impairs Virulence of Xanthomonas oryzae. Front Microbiol 2017; 8:1074. [PMID: 28659894 PMCID: PMC5468448 DOI: 10.3389/fmicb.2017.01074] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 05/29/2017] [Indexed: 12/21/2022] Open
Abstract
Xanthomonas oryzae pv. oryzae (Xoo), a common bacterial plant pathogen regulates its virulence and biofilm formation attribute via a chemical method of communication. Disabling this mechanism offers a promising alternative to reduce the virulence and pathogencity of the microorganism. In this study, the effect of thyme (THY) oil on Quorum Sensing mediated synthesis of various virulence factors and biofilm formation was analyzed. Treatment of Xoo with 500 ppm THY oil displayed a significant diminution in swimming, swarming, exopolysaccharide and xanthomonadin secretion. However, no effect was observed on bacterial growth kinetics and metabolic activity of the cells. Results were further authenticated by RT-qPCR as significant reduction in motA, motB, and flgE genes was observed upon THY oil treatment. Similarly, the expression of some extracellular enzyme genes such as endoglucanase, xylanase, cellobiosidase, and polygalacturonase was also found to be significantly reduced. However, biochemical plate assays revealed insignificant effect of 500 ppm THY oil on secretion of protease, cellulase, and lipase enzymes. The rpfF gene known to play a crucial role in the virulence of the phytopathogenic bacteria was also significantly reduced in the THY oil treated Xoo cells. HPTLC analysis further revealed significant reduction in DSF and BDSF signaling molecules when Xoo cells were treated with 500 ppm THY oil. Disease reduction was observed in in vitro agar plate assay as lesion length was reduced in THY oil treated Xoo cells when compared with the alone treatment. GC-MS result revealed thymol as the active and major component of THY oil which showed potential binding with rpfF gene. Application of 75 μM thymol resulted in downregulation of gumC, motA, estA, virulence acvB and pglA along with rpfF. The other genes such as cheD, flgA, cheY, and pilA, were not found to be significantly affected. Overall, the results clearly indicated THY oil and its active component Thymol to be a potential candidate for the development of anti-virulence agent which in future when applied in combination with conventional bactericides might not only help in lowering the dose of bactericides but also be successful in curbing the disease progression in rice.
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Affiliation(s)
- Akanksha Singh
- Department of Microbial Technology and Nematology, Central Institute of Medicinal and Aromatic Plants, Council of Scientific and Industrial ResearchLucknow, India
| | - Rupali Gupta
- Department of Microbial Technology and Nematology, Central Institute of Medicinal and Aromatic Plants, Council of Scientific and Industrial ResearchLucknow, India
| | - Sudeep Tandon
- Chemical Processing Department, Central Institute of Medicinal and Aromatic Plants, Council of Scientific and Industrial ResearchLucknow, India
| | - Rakesh Pandey
- Department of Microbial Technology and Nematology, Central Institute of Medicinal and Aromatic Plants, Council of Scientific and Industrial ResearchLucknow, India
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Husain FM, Ahmad I, Al-Thubiani AS, Abulreesh HH, AlHazza IM, Aqil F. Leaf Extracts of Mangifera indica L. Inhibit Quorum Sensing - Regulated Production of Virulence Factors and Biofilm in Test Bacteria. Front Microbiol 2017; 8:727. [PMID: 28484444 PMCID: PMC5402315 DOI: 10.3389/fmicb.2017.00727] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 04/07/2017] [Indexed: 01/08/2023] Open
Abstract
Quorum sensing (QS) is a global gene regulatory mechanism in bacteria for various traits including virulence factors. Disabling QS system with anti-infective agent is considered as a potential strategy to prevent bacterial infection. Mangifera indica L. (mango) has been shown to possess various biological activities including anti-QS. This study investigates the efficacy of leaf extracts on QS-regulated virulence factors and biofilm formation in Gram negative pathogens. Mango leaf (ML) extract was tested for QS inhibition and QS-regulated virulence factors using various indicator strains. It was further correlated with the biofilm inhibition and confirmed by electron microscopy. Phytochemical analysis was carried out using ultra performance liquid chromatography (UPLC) and gas chromatography–mass spectrometry (GC-MS) analysis. In vitro evaluation of anti-QS activity of ML extracts against Chromobacterium violaceum revealed promising dose-dependent interference in violacein production, by methanol extract. QS inhibitory activity is also demonstrated by reduction in elastase (76%), total protease (56%), pyocyanin (89%), chitinase (55%), exopolysaccharide production (58%) and swarming motility (74%) in Pseudomonas aeruginosa PAO1 at 800 μg/ml concentration. Biofilm formation by P. aeruginosa PAO1 and Aeromonas hydrophila WAF38 was reduced considerably (36–82%) over control. The inhibition of biofilm was also observed by scanning electron microscopy. Moreover, ML extracts significantly reduced mortality of Caenorhabditis elegans pre-infected with PAO1 at the tested concentration. Phytochemical analysis of active extracts revealed very high content of phenolics in methanol extract and a total of 14 compounds were detected by GC-MS and UPLC. These findings suggest that phytochemicals from the ML could provide bioactive anti-infective and needs further investigation to isolate and uncover their therapeutic efficacy.
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Affiliation(s)
- Fohad M Husain
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim UniversityAligarh, India.,Department of Food Science and Nutrition, College of Food and Agriculture Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim UniversityAligarh, India
| | - Abdullah S Al-Thubiani
- Department of Biology, Faculty of Applied Science, Umm Al-Qura UniversityMakkah, Saudi Arabia
| | - Hussein H Abulreesh
- Department of Biology, Faculty of Applied Science, Umm Al-Qura UniversityMakkah, Saudi Arabia
| | - Ibrahim M AlHazza
- Department of Zoology, College of Science, King Saud UniversityRiyadh, Saudi Arabia
| | - Farrukh Aqil
- Department of Medicine and James Graham Brown Cancer Center, University of Louisville, LouisvilleKY, USA
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Prateeksha, Singh BR, Shoeb M, Sharma S, Naqvi AH, Gupta VK, Singh BN. Scaffold of Selenium Nanovectors and Honey Phytochemicals for Inhibition of Pseudomonas aeruginosa Quorum Sensing and Biofilm Formation. Front Cell Infect Microbiol 2017; 7:93. [PMID: 28386534 PMCID: PMC5362927 DOI: 10.3389/fcimb.2017.00093] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Accepted: 03/08/2017] [Indexed: 11/25/2022] Open
Abstract
Honey is an excellent source of polyphenolic compounds that are effective in attenuating quorum sensing (QS), a chemical process of cell-to-cell communication system used by the opportunistic pathogen Pseudomonas aeruginosa to regulate virulence and biofilm formation. However, lower water solubility and inadequate bioavailability remains major concerns of these therapeutic polyphenols. Its therapeutic index can be improved by using nano-carrier systems to target QS signaling potently. In the present study, we fabricated a unique drug delivery system comprising selenium nanoparticles (SeNPs; non-viral vectors) and polyphenols of honey (HP) for enhancement of anti-QS activity of HP against P. aeruginosa PAO1. The developed selenium nano-scaffold showed superior anti-QS activity, anti-biofilm efficacy, and anti-virulence potential in both in-vitro and in-vivo over its individual components, SeNPs and HP. LasR is inhibited by selenium nano-scaffold in-vitro. Using computational molecular docking studies, we have also demonstrated that the anti-virulence activity of selenium nano-scaffold is reliant on molecular binding that occurs between HP and the QS receptor LasR through hydrogen bonding and hydrophobic interactions. Our preliminary investigations with selenium-based nano-carriers hold significant promise to improve anti-virulence effectiveness of phytochemicals by enhancing effective intracellular delivery.
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Affiliation(s)
- Prateeksha
- Pharmacognosy and Ethnopharmacology Division, Herbal Nanobiotechnology Lab, CSIR-National Botanical Research InstituteLucknow, India
| | - Braj R. Singh
- Centre of Excellence in Materials Science (Nanomaterials), Z. H. College of Engineering and Technology, Aligarh Muslim UniversityAligarh, India
- TERI-Deakin Nanobiotechnology Centre, The Energy Research InstituteNew Delhi, India
| | - M. Shoeb
- Centre of Excellence in Materials Science (Nanomaterials), Z. H. College of Engineering and Technology, Aligarh Muslim UniversityAligarh, India
- TERI-Deakin Nanobiotechnology Centre, The Energy Research InstituteNew Delhi, India
| | - S. Sharma
- Pharmacognosy and Ethnopharmacology Division, Herbal Nanobiotechnology Lab, CSIR-National Botanical Research InstituteLucknow, India
| | - A. H. Naqvi
- Centre of Excellence in Materials Science (Nanomaterials), Z. H. College of Engineering and Technology, Aligarh Muslim UniversityAligarh, India
- TERI-Deakin Nanobiotechnology Centre, The Energy Research InstituteNew Delhi, India
| | - Vijai K. Gupta
- Molecular Glyco-Biotechnology Group, Discipline of Biochemistry, School of Natural Sciences, NUI GalwayGalway, Ireland
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, School of Science, Tallinn University of TechnologyTallinn, Estonia
| | - Brahma N. Singh
- Pharmacognosy and Ethnopharmacology Division, Herbal Nanobiotechnology Lab, CSIR-National Botanical Research InstituteLucknow, India
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Sai Saraswathi V, Kamarudheen N, BhaskaraRao K, Santhakumar K. Phytoremediation of dyes using Lagerstroemia speciosa mediated silver nanoparticles and its biofilm activity against clinical strains Pseudomonas aeruginosa. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 168:107-116. [DOI: 10.1016/j.jphotobiol.2017.02.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 02/07/2017] [Indexed: 10/20/2022]
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Abstract
Biofilm-associated bacteria are less sensitive to antibiotics than free-living (planktonic) cells. Furthermore, with variations in the concentration of antibiotics throughout a biofilm, microbial cells are often exposed to levels below inhibitory concentrations and may develop resistance. This, as well as the irresponsible use of antibiotics, leads to the selection of pathogens that are difficult to eradicate. The Centers for Disease Control and Prevention use the terms "antibiotic" and "antimicrobial agent" interchangeably. However, a clear distinction between these two terms is required for the purpose of this assessment. Therefore, we define "antibiotics" as pharmaceutically formulated and medically administered substances and "antimicrobials" as a broad category of substances which are not regulated as drugs. This comprehensive minireview evaluates the effect of natural antimicrobials on pathogens in biofilms when used instead of, or in combination with, commonly prescribed antibiotics.
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Ganesh PS, Rai RV. Inhibition of quorum-sensing-controlled virulence factors of Pseudomonas aeruginosa by Murraya koenigii essential oil: a study in a Caenorhabditis elegans infectious model. J Med Microbiol 2016; 65:1528-1535. [DOI: 10.1099/jmm.0.000385] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- P. Sankar Ganesh
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysore 570006, Karnataka, India
| | - Ravishankar Vittal Rai
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysore 570006, Karnataka, India
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Characterisation of Pseudomonas spp. and Ochrobactrum sp. isolated from volcanic soil. Antonie van Leeuwenhoek 2016; 110:253-270. [PMID: 27853952 DOI: 10.1007/s10482-016-0796-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 10/24/2016] [Indexed: 10/20/2022]
Abstract
Soil bacteria may have properties of plant growth promotion but not be sufficiently beneficial for plants under stress conditions. This challenge has led researchers to extend their searches into extreme environments for potential soil bacteria with multiple plant beneficial traits as well as abiotic stress tolerance abilities. In the current study, an attempt was made to evaluate soil bacteria from an extreme environment, volcano soils, based on plant growth promoting and abiotic stress mitigating characteristics. The screening led to the isolation of eight (NBRISH4, NBRISH6, NBRISH10, NBRISH11, NBRISH13, NBRISH14, NBRISH16 and NBRISH26) bacterial isolates capable of withstanding stresses, namely temperature (up to 45 °C), salt (up to 2 M NaCl) and drought (up to 60% Poly Ethylene Glycol 6000) in vitro. Further, the selected isolates were notable for their in vitro temporal performance with regards to survival (in terms of colony count), phosphate solubilisation, biofilm formation, auxin, alginate and exo-polysaccharide production abilities under abiotic stresses i.e. 40 °C temperature; 500 mM NaCl salt and drought (PEG) conditions. In vivo seed treatments of individual selected bacteria to maize plants resulted into significant enhancement in root and shoot length, root and shoot fresh and dry weight and number of leaves per plant. Overall, the plant growth promoting and abiotic stress tolerance ability was most evident for bacterial isolate NBRISH6 which was identified as an Ochrobactrum sp. using 16S rRNA based phylogenetic analysis.
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Resilience of bacterial quorum sensing against fluid flow. Sci Rep 2016; 6:33115. [PMID: 27650454 PMCID: PMC5030672 DOI: 10.1038/srep33115] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/16/2016] [Indexed: 02/05/2023] Open
Abstract
Quorum sensing (QS) is a population-density dependent chemical process that enables bacteria to communicate based on the production, secretion and sensing of small inducer molecules. While recombinant constructs have been widely used to decipher the molecular details of QS, how those findings translate to natural QS systems has remained an open question. Here, we compare the activation of natural and synthetic Pseudomonas aeruginosa LasI/R QS systems in bacteria exposed to quiescent conditions and controlled flows. Quantification of QS-dependent GFP expression in suspended cultures and in surface-attached microcolonies revealed that QS onset in both systems was similar under quiescent conditions but markedly differed under flow. Moderate flow (Pe > 25) was sufficient to suppress LasI/R QS recombinantly expressed in Escherichia coli, whereas only high flow (Pe > 102) suppressed QS in wild-type P. aeruginosa. We suggest that this difference stems from the differential production of extracellular matrix and that the matrix confers resilience against moderate flow to QS in wild-type organisms. These results suggest that the expression of a biofilm matrix extends the environmental conditions under which QS-based cell-cell communication is effective and that findings from synthetic QS circuits cannot be directly translated to natural systems.
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Kim HS, Cha E, Kim Y, Jeon YH, Olson BH, Byun Y, Park HD. Raffinose, a plant galactoside, inhibits Pseudomonas aeruginosa biofilm formation via binding to LecA and decreasing cellular cyclic diguanylate levels. Sci Rep 2016; 6:25318. [PMID: 27141909 PMCID: PMC4855137 DOI: 10.1038/srep25318] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 04/15/2016] [Indexed: 12/16/2022] Open
Abstract
Biofilm formation on biotic or abiotic surfaces has unwanted consequences in medical, clinical, and industrial settings. Treatments with antibiotics or biocides are often ineffective in eradicating biofilms. Promising alternatives to conventional agents are biofilm-inhibiting compounds regulating biofilm development without toxicity to growth. Here, we screened a biofilm inhibitor, raffinose, derived from ginger. Raffinose, a galactotrisaccharide, showed efficient biofilm inhibition of Pseudomonas aeruginosa without impairing its growth. Raffinose also affected various phenotypes such as colony morphology, matrix formation, and swarming motility. Binding of raffinose to a carbohydrate-binding protein called LecA was the cause of biofilm inhibition and altered phenotypes. Furthermore, raffinose reduced the concentration of the second messenger, cyclic diguanylate (c-di-GMP), by increased activity of a c-di-GMP specific phosphodiesterase. The ability of raffinose to inhibit P. aeruginosa biofilm formation and its molecular mechanism opens new possibilities for pharmacological and industrial applications.
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Affiliation(s)
- Han-Shin Kim
- School of Civil, Environmental and Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, South Korea
| | - Eunji Cha
- School of Civil, Environmental and Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, South Korea
| | - YunHye Kim
- College of Pharmacy, Korea University, Sejong-ro 2511, Jochiwon-eup, Sejong, 339-700, South Korea
| | - Young Ho Jeon
- College of Pharmacy, Korea University, Sejong-ro 2511, Jochiwon-eup, Sejong, 339-700, South Korea
| | - Betty H. Olson
- Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697, USA
| | - Youngjoo Byun
- College of Pharmacy, Korea University, Sejong-ro 2511, Jochiwon-eup, Sejong, 339-700, South Korea
| | - Hee-Deung Park
- School of Civil, Environmental and Architectural Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, South Korea
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Mycofabricated biosilver nanoparticles interrupt Pseudomonas aeruginosa quorum sensing systems. Sci Rep 2015; 5:13719. [PMID: 26347993 PMCID: PMC4562228 DOI: 10.1038/srep13719] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 07/14/2015] [Indexed: 01/19/2023] Open
Abstract
Quorum sensing (QS) is a chemical communication process that Pseudomonas aeruginosa uses to regulate virulence and biofilm formation. Disabling of QS is an emerging approach for combating its pathogenicity. Silver nanoparticles (AgNPs) have been widely applied as antimicrobial agents against human pathogenic bacteria and fungi, but not for the attenuation of bacterial QS. Here we mycofabricated AgNPs (mfAgNPs) using metabolites of soil fungus Rhizopus arrhizus BRS-07 and tested their effect on QS-regulated virulence and biofilm formation of P. aeruginosa. Transcriptional studies demonstrated that mfAgNPs reduced the levels of LasIR-RhlIR. Treatment of mfAgNPs inhibited biofilm formation, production of several virulence factors (e.g. LasA protease, LasB elastrase, pyocyanin, pyoverdin, pyochelin, rhamnolipid, and alginate) and reduced AHLs production. Further genes quantification analyses revealed that mfAgNPs significantly down-regulated QS-regulated genes, specifically those encoded to the secretion of virulence factors. The results clearly indicated the anti-virulence property of mfAgNPs by inhibiting P. aeruginosa QS signaling.
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Sadekuzzaman M, Yang S, Mizan M, Ha S. Current and Recent Advanced Strategies for Combating Biofilms. Compr Rev Food Sci Food Saf 2015. [DOI: 10.1111/1541-4337.12144] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- M. Sadekuzzaman
- School of Food Science and Technology; Chung-Ang Univ; 72-1 Nae-Ri Daedeok-Myun, Anseong Gyunggido 456-756 South Korea Dept. of Livestock Services, People's Republic of Bangladesh
| | - S. Yang
- Chung-Ang Univ; 72-1 Nae-Ri Daedeok-Myun, Anseong Gyunggido 456-756 South Korea
| | - M.F.R. Mizan
- Chung-Ang Univ; 72-1 Nae-Ri Daedeok-Myun, Anseong Gyunggido 456-756 South Korea
| | - S.D. Ha
- Chung-Ang Univ; 72-1 Nae-Ri Daedeok-Myun, Anseong Gyunggido 456-756 South Korea
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Husain FM, Ahmad I, Khan MS, Ahmad E, Tahseen Q, Khan MS, Alshabib NA. Sub-MICs of Mentha piperita essential oil and menthol inhibits AHL mediated quorum sensing and biofilm of Gram-negative bacteria. Front Microbiol 2015; 6:420. [PMID: 26029178 PMCID: PMC4429619 DOI: 10.3389/fmicb.2015.00420] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 04/21/2015] [Indexed: 01/17/2023] Open
Abstract
Bacterial quorum sensing (QS) is a density dependent communication system that regulates the expression of certain genes including production of virulence factors in many pathogens. Bioactive plant extract/compounds inhibiting QS regulated gene expression may be a potential candidate as antipathogenic drug. In this study anti-QS activity of peppermint (Mentha piperita) oil was first tested using the Chromobacterium violaceum CVO26 biosensor. Further, the findings of the present investigation revealed that peppermint oil (PMO) at sub-Minimum Inhibitory Concentrations (sub-MICs) strongly interfered with acyl homoserine lactone (AHL) regulated virulence factors and biofilm formation in Pseudomonas aeruginosa and Aeromonas hydrophila. The result of molecular docking analysis attributed the QS inhibitory activity exhibited by PMO to menthol. Assessment of ability of menthol to interfere with QS systems of various Gram-negative pathogens comprising diverse AHL molecules revealed that it reduced the AHL dependent production of violacein, virulence factors, and biofilm formation indicating broad-spectrum anti-QS activity. Using two Escherichia coli biosensors, MG4/pKDT17 and pEAL08-2, we also confirmed that menthol inhibited both the las and pqs QS systems. Further, findings of the in vivo studies with menthol on nematode model Caenorhabditis elegans showed significantly enhanced survival of the nematode. Our data identified menthol as a novel broad spectrum QS inhibitor.
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Affiliation(s)
- Fohad M Husain
- Department of Agricultural Microbiology, Aligarh Muslim University Aligarh, India ; Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University Riyadh, Saudi Arabia
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Aligarh Muslim University Aligarh, India
| | - Mohammad S Khan
- Department of Agricultural Microbiology, Aligarh Muslim University Aligarh, India
| | - Ejaz Ahmad
- School of Pharmaceutical Sciences, Sao Paulo State University Araraquara, Brazil
| | - Qudisa Tahseen
- Department of Zoology, Aligarh Muslim University Aligarh, India
| | - Mohd Shahnawaz Khan
- Department of Biochemistry, Protein Research Chair, College of Science, King Saud University Riyadh, Saudi Arabia
| | - Nasser A Alshabib
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University Riyadh, Saudi Arabia
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Trigonella foenum-graceum (Seed) Extract Interferes with Quorum Sensing Regulated Traits and Biofilm Formation in the Strains of Pseudomonas aeruginosa and Aeromonas hydrophila. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:879540. [PMID: 26000026 PMCID: PMC4427017 DOI: 10.1155/2015/879540] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 01/13/2015] [Accepted: 01/14/2015] [Indexed: 11/28/2022]
Abstract
Trigonella foenum-graecum L. (Fenugreek) is an important plant of the Leguminosae family known to have medicinal properties. However, fraction based antiquorum sensing and antibiofilm activities have not been reported from this plant. In the present study T. foenum-graecum seed extract was sequentially fractionated and sub-MICs were tested for above activities. The methanol fraction of the extract demonstrated significant inhibition of AHL regulated virulence factors: protease, LasB elastase, pyocyanin production, chitinase, EPS, and swarming motility in Pseudomonas aeruginosa PAO1 and PAF79. Further, QS dependent virulence factor in the aquatic pathogen Aeromonas hydrophila WAF38 was also reduced. Application of T. foenum-graecum seed extract to PAO1, PAF79, and WAF38 decreased the biofilm forming abilities of the pathogens by significant levels. The extract also exhibited reduced AHL levels and subsequent downregulation of lasB gene. In vivo study showed an enhanced survival of PAO1-preinfected C. elegans after treatment with extract at 1 mg/mL. Further, the major compound detected by GC-MS, caffeine, reduced the production of QS regulated virulence factors and biofilm at 200 µg/mL concentration indicating its role in the activity of the methanol extract. The results of the present study reveal the potential anti-QS and antibiofilm property of T. foenum-graceum extract and caffeine.
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Colostrum hexasaccharide, a novel Staphylococcus aureus quorum-sensing inhibitor. Antimicrob Agents Chemother 2015; 59:2169-78. [PMID: 25645850 DOI: 10.1128/aac.03722-14] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The discovery of quorum-sensing (QS) systems regulating antibiotic resistance and virulence factors (VFs) has afforded a novel opportunity to prevent bacterial pathogenicity. Dietary molecules have been demonstrated to attenuate QS circuits of bacteria. But, to our knowledge, no study exploring the potential of colostrum hexasaccharide (CHS) in regulating QS systems has been published. In this study, we analyzed CHS for inhibiting QS signaling in Staphylococcus aureus. We isolated and characterized CHS from mare colostrum by high-performance thin-layer chromatography (HPTLC), reverse-phase high-performance liquid chromatography evaporative light-scattering detection (RP-HPLC-ELSD), (1)H and (13)C nuclear magnetic resonance (NMR), and electrospray ionization mass spectrometry (ESI-MS). Antibiofilm activity of CHS against S. aureus and its possible interference with bacterial QS systems were determined. The inhibition and eradication potentials of the biofilms were studied by microscopic analyses and quantified by 96-well-microtiter-plate assays. Also, the ability of CHS to interfere in bacterial QS by degrading acyl-homoserine lactones (AHLs), one of the most studied signal molecules for Gram-negative bacteria, was evaluated. The results revealed that CHS exhibited promising inhibitory activities against QS-regulated secretion of VFs, including spreading ability, hemolysis, protease, and lipase activities, when applied at a rate of 5 mg/ml. The results of biofilm experiments indicated that CHS is a strong inhibitor of biofilm formation and also has the ability to eradicate it. The potential of CHS to interfere with bacterial QS systems was also examined by degradation of AHLs. Furthermore, it was documented that CHS decreased antibiotic resistance in S. aureus. The results thus give a lead that mare colostrum can be a promising source for isolating a next-generation antibacterial.
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Quercetin sensitizes fluconazole-resistant candida albicans to induce apoptotic cell death by modulating quorum sensing. Antimicrob Agents Chemother 2015; 59:2153-68. [PMID: 25645848 DOI: 10.1128/aac.03599-14] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Quorum sensing (QS) regulates group behaviors of Candida albicans such as biofilm, hyphal growth, and virulence factors. The sesquiterpene alcohol farnesol, a QS molecule produced by C. albicans, is known to regulate the expression of virulence weapons of this fungus. Fluconazole (FCZ) is a broad-spectrum antifungal drug that is used for the treatment of C. albicans infections. While FCZ can be cytotoxic at high concentrations, our results show that at much lower concentrations, quercetin (QC), a dietary flavonoid isolated from an edible lichen (Usnea longissima), can be implemented as a sensitizing agent for FCZ-resistant C. albicans NBC099, enhancing the efficacy of FCZ. QC enhanced FCZ-mediated cell killing of NBC099 and also induced cell death. These experiments indicated that the combined application of both drugs was FCZ dose dependent rather than QC dose dependent. In addition, we found that QC strongly suppressed the production of virulence weapons-biofilm formation, hyphal development, phospholipase, proteinase, esterase, and hemolytic activity. Treatment with QC also increased FCZ-mediated cell death in NBC099 biofilms. Interestingly, we also found that QC enhances the anticandidal activity of FCZ by inducing apoptotic cell death. We have also established that this sensitization is reliant on the farnesol response generated by QC. Molecular docking studies also support this conclusion and suggest that QC can form hydrogen bonds with Gln969, Thr1105, Ser1108, Arg1109, Asn1110, and Gly1061 in the ATP binding pocket of adenylate cyclase. Thus, this QS-mediated combined sensitizer (QC)-anticandidal agent (FCZ) strategy may be a novel way to enhance the efficacy of FCZ-based therapy of C. albicans infections.
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Jadaun V, Prateeksha P, Singh BR, Paliya BS, Upreti DK, Rao CV, Rawat AKS, Singh BN. Honey enhances the anti-quorum sensing activity and anti-biofilm potential of curcumin. RSC Adv 2015. [DOI: 10.1039/c5ra14427b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this investigation, the potential of curcumin (50 μg mL−1) plus 1% of honey (ChC) in reducing QS-mediated production of virulence factors and biofilm formation inPseudomonas aeruginosaPAO1 was studied.
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Affiliation(s)
- V. Jadaun
- Pharmacognosy & Ethnopharmacology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
| | - Prateeksha Prateeksha
- Pharmacognosy & Ethnopharmacology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
| | - Braj R. Singh
- Centre of Excellence in Materials Science (Nanomaterials)
- Z.H. College of Engineering & Technology
- Aligarh Muslim University
- Aligarh-202002
- India
| | - B. S. Paliya
- Pharmacognosy & Ethnopharmacology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
| | - D. K. Upreti
- Lichenology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
| | - Ch. V. Rao
- Pharmacognosy & Ethnopharmacology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
| | - A. K. S. Rawat
- Pharmacognosy & Ethnopharmacology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
| | - Brahma N. Singh
- Pharmacognosy & Ethnopharmacology Division
- CSIR-National Botanical Research Institute
- Lucknow-226 001
- India
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Singh BN, Prateeksha P, Pandey G, Jadaun V, Singh S, Bajpai R, Nayaka S, Naqvi AH, Singh Rawat AK, Upreti DK, Singh BR. Development and characterization of a novel Swarna-based herbo-metallic colloidal nano-formulation – inhibitor of Streptococcus mutans quorum sensing. RSC Adv 2015. [DOI: 10.1039/c4ra11939h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Herbo-metallic preparations such as bhasmas (ash) are used traditionally in Indian and Chinese medicinal systems.
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Bilcu M, Grumezescu AM, Oprea AE, Popescu RC, Mogoșanu GD, Hristu R, Stanciu GA, Mihailescu DF, Lazar V, Bezirtzoglou E, Chifiriuc MC. Efficiency of vanilla, patchouli and ylang ylang essential oils stabilized by iron oxide@C14 nanostructures against bacterial adherence and biofilms formed by Staphylococcus aureus and Klebsiella pneumoniae clinical strains. Molecules 2014; 19:17943-56. [PMID: 25375335 PMCID: PMC6271200 DOI: 10.3390/molecules191117943] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 10/22/2014] [Accepted: 10/29/2014] [Indexed: 12/11/2022] Open
Abstract
Biofilms formed by bacterial cells are associated with drastically enhanced resistance against most antimicrobial agents, contributing to the persistence and chronicization of the microbial infections and to therapy failure. The purpose of this study was to combine the unique properties of magnetic nanoparticles with the antimicrobial activity of three essential oils to obtain novel nanobiosystems that could be used as coatings for catheter pieces with an improved resistance to Staphylococcus aureus and Klebsiella pneumoniae clinical strains adherence and biofilm development. The essential oils of ylang ylang, patchouli and vanilla were stabilized by the interaction with iron oxide@C14 nanoparticles to be further used as coating agents for medical surfaces. Iron oxide@C14 was prepared by co-precipitation of Fe+2 and Fe+3 and myristic acid (C14) in basic medium. Vanilla essential oil loaded nanoparticles pelliculised on the catheter samples surface strongly inhibited both the initial adherence of S. aureus cells (quantified at 24 h) and the development of the mature biofilm quantified at 48 h. Patchouli and ylang-ylang essential oils inhibited mostly the initial adherence phase of S. aureus biofilm development. In the case of K. pneumoniae, all tested nanosystems exhibited similar efficiency, being active mostly against the adherence K. pneumoniae cells to the tested catheter specimens. The new nanobiosystems based on vanilla, patchouli and ylang-ylang essential oils could be of a great interest for the biomedical field, opening new directions for the design of film-coated surfaces with anti-adherence and anti-biofilm properties.
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Affiliation(s)
- Maxim Bilcu
- Microbiology Department, Faculty of Biology, Research Institute of the University of Bucharest, University of Bucharest, Aleea Portocalelor No. 1-3, 060101 Bucharest, Romania.
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu Street No. 1-7, 011061 Bucharest, Romania.
| | - Alexandra Elena Oprea
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu Street No. 1-7, 011061 Bucharest, Romania.
| | - Roxana Cristina Popescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu Street No. 1-7, 011061 Bucharest, Romania.
| | - George Dan Mogoșanu
- Department of Pharmacognosy & Phytotherapy, Faculty of Pharmacy, University of Medicine and Pharmacy of Craiova, 2 Petru Rareş Street, 200349 Craiova, Romania.
| | - Radu Hristu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania.
| | - George A Stanciu
- Center for Microscopy-Microanalysis and Information Processing, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania.
| | - Dan Florin Mihailescu
- Microbiology Department, Faculty of Biology, Research Institute of the University of Bucharest, University of Bucharest, Aleea Portocalelor No. 1-3, 060101 Bucharest, Romania.
| | - Veronica Lazar
- Microbiology Department, Faculty of Biology, Research Institute of the University of Bucharest, University of Bucharest, Aleea Portocalelor No. 1-3, 060101 Bucharest, Romania.
| | - Eugenia Bezirtzoglou
- Laboratory of Microbiology, Biotechnology and Hygiene, Department of Food Science and Technology, Faculty of Agricultural Development, Democritus University of Thrace, 68200 Orestiada, Greece.
| | - Mariana Carmen Chifiriuc
- Microbiology Department, Faculty of Biology, Research Institute of the University of Bucharest, University of Bucharest, Aleea Portocalelor No. 1-3, 060101 Bucharest, Romania.
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Ahmad I, Husain FM, Maheshwari M, Zahin M. Medicinal Plants and Phytocompounds: A Potential Source of Novel Antibiofilm Agents. SPRINGER SERIES ON BIOFILMS 2014. [DOI: 10.1007/978-3-642-53833-9_10] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Innovative strategies to overcome biofilm resistance. BIOMED RESEARCH INTERNATIONAL 2012; 2013:150653. [PMID: 23509680 PMCID: PMC3591221 DOI: 10.1155/2013/150653] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 09/03/2012] [Accepted: 09/19/2012] [Indexed: 12/29/2022]
Abstract
We review the recent literature concerning the efficiency of antimicrobial photodynamic inactivation toward various microbial species in planktonic and biofilm cultures. The review is mainly focused on biofilm-growing microrganisms because this form of growth poses a threat to chronically infected or immunocompromised patients and is difficult to eradicate from medical devices. We discuss the biofilm formation process and mechanisms of its increased resistance to various antimicrobials. We present, based on data in the literature, strategies for overcoming the problem of biofilm resistance. Factors that have potential for use in increasing the efficiency of the killing of biofilm-forming bacteria include plant extracts, enzymes that disturb the biofilm structure, and other nonenzymatic molecules. We propose combining antimicrobial photodynamic therapy with various antimicrobial and antibiofilm approaches to obtain a synergistic effect to permit efficient microbial growth control at low photosensitizer doses.
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Zhu H, Liu W, Wang SX, Tian BZ, Zhang SS. Evaluation of anti-quorum-sensing activity of fermentation metabolites from different strains of a medicinal mushroom, Phellinus igniarius. Chemotherapy 2012; 58:195-9. [PMID: 22739070 DOI: 10.1159/000338383] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 02/27/2012] [Indexed: 01/09/2023]
Abstract
AIMS This study aimed to evaluate the different abilities of various Phellinus igniarius strains inhibiting quorum sensing (QS), to search for novel QS inhibitors from them and to analyze their inhibitory activity, with a view to their possible use in controlling infections. METHODS The bioactive metabolites produced by P. igniarius cultures were tested for their abilities to inhibit QS-regulated behavior. All P. igniarius strains were cultured in potato-dextrose medium by large-scale submerged fermentation. The culture supernatant was condensed into 0.2-fold volumes by freeze drying. The condensed supernatant was sterilized by filtration through a 0.22-µm membrane filter and added to Chromobacterium violaceum CV026 cultures, which were used to monitor QS inhibition. Inhibitory activity was measured by quantifying violacein production using a microplate reader. RESULTS The bioactive metabolites produced by 10 P. igniarius strains could inhibit violacein production, a QS-regulated behavior in C. violaceum. Furthermore, these strains could be roughly categorized into three groups on the basis of their inhibitory activities. CONCLUSIONS P. igniarius strains can produce QS-inhibitory compounds and have different abilities to inhibit QS.
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Affiliation(s)
- Hu Zhu
- State Key Laboratory of Heavy Oil Processing, Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao, PR China.
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