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Samreen, Ahmad I, Siddiqui SA, Naseer A, Nazir A. Efflux Pump Inhibition-Based Screening and Anti-Infective Evaluation of Punica granatum Against Bacterial Pathogens. Curr Microbiol 2023; 81:51. [PMID: 38151670 DOI: 10.1007/s00284-023-03572-x] [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: 08/25/2023] [Accepted: 11/23/2023] [Indexed: 12/29/2023]
Abstract
Drug efflux pumps contribute to bacterial multidrug resistance (MDR), reducing antibiotic effectiveness and causing treatment failures. Besides their role in MDR, efflux pumps also assist in the transportation of quorum sensing (QS) signal molecules and increased the tolerance of biofilms. Recently, the search for efflux pump inhibitors from natural sources, including anti-infective plants, has gained attention as a potential therapy against drug-resistant bacteria. In this study, 19 traditional Indian medicinal plants were screened for their efflux pump inhibitory activity against Escherichia coli TGI. The promising extract, i.e., Punica granatum was subsequently fractioned in the solvents of increasing polarity. Among them, at sub-MIC active EPI fraction was PGEF (P. granatum ethyl acetate fraction), further investigated for anti-infective potential against Chromobacterium violaceum 12,472, Pseudomonas aeruginosa PAO1, and Serratia marcescens MTCC 97. PGEF was also evaluated for in vivo efficacy in Caenorhabditis elegans model. Major phytocompounds were analyzed by mass spectroscopic techniques. At respective Sub-MIC, PGEF reduced violacein production by 71.14% in C. violaceum 12,472. Moreover, PGEF inhibited pyocyanin (64.72%), pyoverdine (48.17%), protease (51.35%), and swarming motility (44.82%) of P. aeruginosa PAO1. Furthermore, PGEF reduced the production of prodigiosin and exoprotease by 64.73% and 61.80%, respectively. Similarly, at sub-MIC, PGEF inhibited (≥ 50%) biofilm development in all test pathogens. The key phytocompounds detected in active fraction include 5-hydroxymethylfurfural, trans-p-coumaric acid 4- glucoside, (-)-Epicatechin 3'-O-glucuronide, and ellagic acid. Interestingly, PGEF also demonstrated anti-infective efficacy against the PAO1-infected C. elegans test model and highlighting its therapeutic potential as an anti-infective agent to combat drug-resistant problems.
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Affiliation(s)
- Samreen
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India.
| | - Shirjeel Ahmad Siddiqui
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India
| | - Anam Naseer
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Division of Toxicology & Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Aamir Nazir
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Division of Toxicology & Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow, 226031, India
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Yan CH, Chen FH, Yang YL, Zhan YF, Herman RA, Gong LC, Sheng S, Wang J. The Transcription Factor CsgD Contributes to Engineered Escherichia coli Resistance by Regulating Biofilm Formation and Stress Responses. Int J Mol Sci 2023; 24:13681. [PMID: 37761984 PMCID: PMC10530992 DOI: 10.3390/ijms241813681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/30/2023] [Accepted: 09/02/2023] [Indexed: 09/29/2023] Open
Abstract
The high cell density, immobilization and stability of biofilms are ideal characteristics for bacteria in resisting antibiotic therapy. CsgD is a transcription activating factor that regulates the synthesis of curly fimbriae and cellulose in Escherichia coli, thereby enhancing bacterial adhesion and promoting biofilm formation. To investigate the role of CsgD in biofilm formation and stress resistance in bacteria, the csgD deletion mutant ΔcsgD was successfully constructed from the engineered strain E. coli BL21(DE3) using the CRISPR/Cas9 gene-editing system. The results demonstrated that the biofilm of ΔcsgD decreased by 70.07% (p < 0.05). Additionally, the mobility and adhesion of ΔcsgD were inhibited due to the decrease in curly fimbriae and extracellular polymeric substances. Furthermore, ΔcsgD exhibited a significantly decreased resistance to acid, alkali and osmotic stress conditions (p < 0.05). RNA-Seq results revealed 491 differentially expressed genes between the parent strain and ΔcsgD, with enrichment primarily observed in metabolism-related processes as well as cell membrane structure and catalytic activity categories. Moreover, CsgD influenced the expression of biofilm and stress response genes pgaA, motB, fimA, fimC, iraP, ompA, osmC, sufE and elaB, indicating that the CsgD participated in the resistance of E. coli by regulating the expression of biofilm and stress response. In brief, the transcription factor CsgD plays a key role in the stress resistance of E. coli, and is a potential target for treating and controlling biofilm.
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Affiliation(s)
- Cheng-Hai Yan
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
| | - Fang-Hui Chen
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
| | - Yu-Lu Yang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
| | - Yu-Fan Zhan
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
| | - Richard A. Herman
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
| | - Lu-Chan Gong
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Sheng Sheng
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Jun Wang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (C.-H.Y.); (F.-H.C.); (Y.-L.Y.); (Y.-F.Z.); (R.A.H.); (L.-C.G.); (S.S.)
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
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Qayed WS, Hassan MA, Abouwarda AM, Ibrahim YM, Aboul-Fadl T. Computational Design of Azine-Linked Hybrids of 2-Indolinone-Thiazolodine Scaffold as Novel and Promising Quorum Sensing Inhibitors. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2165511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Wesam S. Qayed
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit, Egypt
| | - Mostafa A. Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit, Egypt
| | - Ahmed Megahed Abouwarda
- Department of Microbiology, General Division of Basic Medical Sciences, Egyptian Drug Authority (EDA), Formerly National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Yasser Musa Ibrahim
- Department of Microbiology, General Division of Basic Medical Sciences, Egyptian Drug Authority (EDA), Formerly National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Tarek Aboul-Fadl
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit, Egypt
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Quorum Sensing Orchestrates Antibiotic Drug Resistance, Biofilm Formation, and Motility in Escherichia coli and Quorum Quenching Activities of Plant-derived Natural Products: A Review. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.3.52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Quorum sensing (QS) is a type of cell-to-cell communication that is influenced by an increase in signaling molecules known as autoinducers, which is correlated to the increase in the density of microbial communities. In this review, we aim to discuss and provide updates on the different signaling molecules used by Escherichia coli, such as acyl-homoserine lactone (AHL), autoinducer-2 (AI-2), and indole to influence key phenotypes such as antibiotic drug resistance, biofilm formation, and motility during quorum sensing. Based on the literature, E. coli signaling molecules have different functions during cell-to-cell communication such that the increase in AHL and indole was found to cause the modulation of antibiotic resistance and inhibition of biofilm formation and motility. Meanwhile, AI-2 is known to modulate biofilm formation, antibiotic resistance, and motility. On the other hand, in the existing literature, we found that various plants possess phytochemicals that can be used to alter QS and its downstream key phenotypes such as biofilm formation, swimming and swarming motility, and genes related to motility, curli and AI-2 production. However, the exact physiological and molecular mechanisms of these natural compounds are still understudied. Understanding the mechanisms of those phytochemicals during QS are therefore highly recommended to conduct as a necessary step for future scholars to develop drugs that target the actions of QS-signaling molecules and receptors linked to antibiotic resistance, biofilm formation, and motility without putting bacteria under stress, thereby preventing the development of drug resistance.
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Pomegranate (Punica granatum L.) Peel Extracts as Antimicrobial and Antioxidant Additives Used in Alfalfa Sprouts. Foods 2022; 11:foods11172588. [PMID: 36076774 PMCID: PMC9455905 DOI: 10.3390/foods11172588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022] Open
Abstract
Aqueous and ethanolic pomegranate peel extracts (PPE) were studied as a source of phenolic compounds with antimicrobial, anti-quorum sensing, and antioxidant properties. The aqueous extract showed higher total phenolic and flavonoid content (153.43 mg GAE/g and 45.74, respectively) and antioxidant capacity (DPPH radical inhibition: 86.12%, ABTS radical scavenging capacity: 958.21 mg TE/dw) compared to the ethanolic extract. The main phenolic compounds identified by UPLC-DAD were chlorogenic and gallic acids. The aqueous PPE extract showed antimicrobial activity against Listeria monocytogenes, Salmonella Typhimurium, Candida tropicalis (MICs 19–30 mg/mL), and anti-quorum sensing activity expressed as inhibition of Chromobacterium violaceum violacein production (%). The aqueous PPE extracts at 25 mg/mL applied on alfalfa sprouts reduced psychrophilic bacteria (1.12 Log CFU/100 g) and total coliforms (1.23 Log CFU/100 g) and increased the antioxidant capacity of the treated sprouts (55.13 µmol TE/100 g (DPPH) and 126.56 µmol TE/100 g (ABTS)) compared to untreated alfalfa. This study emphasizes PPE’s antioxidant and antimicrobial activities in alfalfa sprouts preservation.
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Karuppiah V, Seralathan M. Quorum sensing inhibitory potential of vaccenic acid against Chromobacterium violaceum and methicillin-resistant Staphylococcus aureus. World J Microbiol Biotechnol 2022; 38:146. [PMID: 35759150 DOI: 10.1007/s11274-022-03335-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 06/10/2022] [Indexed: 11/25/2022]
Abstract
Quorum sensing (QS) is a potential target for inhibiting bacterial antibiotic resistance and associated pathogenicity. The present study aimed to investigate vaccenic acid anti-QS and antibiofilm potential against Chromobacterium violaceum and methicillin-resistant Staphylococcus aureus (MRSA). In the broth microdilution method, we determined the minimum inhibitory concentration (MIC) of vaccenic acid against C. violaceum and MRSA. Then, we determined the vaccenic acid anti-QS potential against C. violaceum via a violacein inhibition assay. Vaccenic acid at a sub-MIC concentration significantly inhibited violacein pigment production. Vaccenic acid also inhibits C. violaceum and MRSA biofilm formation at sub-MIC concentrations. The effect of vaccenic acid antivirulence potential was evaluated by phenotypic virulence assays. The results showed that vaccenic acid at a sub-MIC concentration significantly inhibited the virulence production of C. violaceum (chitinase and motility) and MRSA (hemolysin and staphyloxanthin production). Quantitative PCR analysis revealed the downregulation of QS associated genes upon vaccenic acid treatment. This resulted in the downregulation of genes involved in QS mechanisms such as cviI, cviR, and SarA and pigment production such as vioB and crtM. The results of the present study suggest that vaccenic acid is a promising agent to combat C. violaceum and MRSA.
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Affiliation(s)
- Vijayakumar Karuppiah
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Cuddalore, Tamil Nadu, 608 502, India.
- PAR Life Sciences and Research Private Limited, Woraiyur, Trichy, Tamil Nadu, 620003, India.
| | - Muhilvannan Seralathan
- PAR Life Sciences and Research Private Limited, Woraiyur, Trichy, Tamil Nadu, 620003, India
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Al-Mnaser A, Dakheel M, Alkandari F, Woodward M. Polyphenolic phytochemicals as natural feed additives to control bacterial pathogens in the chicken gut. Arch Microbiol 2022; 204:253. [PMID: 35412092 PMCID: PMC9001821 DOI: 10.1007/s00203-022-02862-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 03/17/2022] [Accepted: 03/20/2022] [Indexed: 01/21/2023]
Abstract
Poultry provides an important protein source consumed globally by human population, and simultaneously, acts as a substantial reservoir of antibiotic resistant bacterial species such as Escherichia coli, Salmonella, Campylobacter, Clostridium perfringens. These bacterial species can include commensal strains with beneficial roles on poultry health and productivity, and pathogenic strains not only to poultry but zoonotically to man. This review paper evaluates the role of phytochemicals as possible alternatives to antibiotics and natural anti-bacterial agents to control antibiotic resistance in poultry. The focus of this paper is on the polyphenolic phytochemicals as they constitute the major group; carvacrol oil (the active ingredient of oregano), thymol oil (the main ingredient of oregano), oregano oil, and tannins oil as feed additives and their mechanism of actions that might enhance avian gut health by controlling antibiotic-resistant bacterial strains spread in poultry.
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Affiliation(s)
- Afnan Al-Mnaser
- Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, RG6 6DZ, UK.
- Dasman Diabetes Institute, Dasman, Sharq, Kuwait.
| | - Mohammed Dakheel
- Department of Veterinary Public Health, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq
| | - Fatemah Alkandari
- Department of Plant Protection, Public Authority of Agriculture Affairs and Fish Resources, Al-Rabia, Kuwait
| | - Martin Woodward
- Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, RG6 6DZ, UK
- Folium Science, Unit DX, Bristol, BS2 0XJ, UK
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Giannakara M, Koumandou VL. Evolution of two-component quorum sensing systems. Access Microbiol 2022; 4:000303. [PMID: 35252749 PMCID: PMC8895600 DOI: 10.1099/acmi.0.000303] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 11/15/2021] [Indexed: 12/16/2022] Open
Abstract
Quorum sensing (QS) is a cell-to-cell communication system that enables bacteria to coordinate their gene expression depending on their population density, via the detection of small molecules called autoinducers. In this way bacteria can act collectively to initiate processes like bioluminescence, virulence and biofilm formation. Autoinducers are detected by receptors, some of which are part of two-component signal transduction systems (TCS), which comprise of a (usually membrane-bound) sensor histidine kinase (HK) and a cognate response regulator (RR). Different QS systems are used by different bacterial taxa, and their relative evolutionary relationships have not been extensively studied. To address this, we used the Kyoto Encyclopedia of Genes and Genomes (KEGG) database to identify all the QS HKs and RRs that are part of TCSs and examined their conservation across microbial taxa. We compared the combinations of the highly conserved domains in the different families of receptors and response regulators using the Simple Modular Architecture Research Tool (SMART) and KEGG databases, and we also carried out phylogenetic analyses for each family, and all families together. The distribution of the different QS systems across taxa, indicates flexibility in HK–RR pairing and highlights the need for further study of the most abundant systems. For both the QS receptors and the response regulators, our results indicate close evolutionary relationships between certain families, highlighting a common evolutionary history which can inform future applications, such as the design of novel inhibitors for pathogenic QS systems.
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Affiliation(s)
- Marina Giannakara
- Genetics Laboratory, Department of Biotechnology, Agricultural University of Athens, Athens, Greece
| | - Vassiliki Lila Koumandou
- Genetics Laboratory, Department of Biotechnology, Agricultural University of Athens, Athens, Greece
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Ahmed SO, Zedan HH, Ibrahim YM. Quorum sensing inhibitory effect of bergamot oil and aspidosperma extract against Chromobacterium violaceum and Pseudomonas aeruginosa. Arch Microbiol 2021; 203:4663-4675. [PMID: 34175964 DOI: 10.1007/s00203-021-02455-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/21/2021] [Accepted: 06/21/2021] [Indexed: 10/21/2022]
Abstract
Quorum sensing (QS) represents a major target for reducing bacterial pathogenicity and antibiotic resistance. This study identifies bergamot and aspidosperma as new potential sources of anti-QS agents. We investigated the anti-QS activity of plant materials on both Chromobacterium violaceum and Pseudomonas aeruginosa. Initially, we determined the minimum inhibitory concentrations (MICs) of plant materials using a broth microdilution method. Subsequently, we tested the effect of sub-MIC concentrations on QS-regulated traits and virulence factors production in test bacteria. Results revealed that bergamot and aspidosperma inhibited the ability of C. violaceum to produce violacein. Other QS-controlled phenotypes of C. violaceum, namely chitinolytic activity, motility, and biofilm formation, were also reduced by both plant materials. Moreover, QS-linked traits of P. aeruginosa were also reduced. Bergamot inhibited swarming but not swimming motility, while aspidosperma diminished both motility types in P. aeruginosa. Both plant materials also demonstrated antibiofilm activity and inhibited the production of protease and pyocyanin in P. aeruginosa. Furthermore, we tested the anti-QS effect of plant materials on the transcriptional level using RT-qPCR. Bergamot dramatically downregulated the C. violaceum autoinducer synthase gene cviI and the vioB gene involved in violacein biosynthesis, confirming the phenotypic observation on its anti-QS activity. Aspidosperma also reduced the expression of cviI and vioB but less drastically than bergamot. In P. aeruginosa, downregulation in the transcripts of the QS genes lasI, lasR, rhlI, and rhlR was also achieved by bergamot and aspidosperma. Therefore, data in the present study suggest the usefulness of bergamot and aspidosperma as sources of antivirulence agents.
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Affiliation(s)
- Sarah Omar Ahmed
- Department of Microbiology, General Division of Basic Medical Sciences, Egyptian Drug Authority (EDA), Formerly National Organization for Drug Control and Research (NODCAR), Giza, 12611, Egypt
| | - Hamdallah Hafez Zedan
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Yasser Musa Ibrahim
- Department of Microbiology, General Division of Basic Medical Sciences, Egyptian Drug Authority (EDA), Formerly National Organization for Drug Control and Research (NODCAR), Giza, 12611, Egypt.
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Choi J, Kim WK. Dietary Application of Tannins as a Potential Mitigation Strategy for Current Challenges in Poultry Production: A Review. Animals (Basel) 2020; 10:ani10122389. [PMID: 33327595 PMCID: PMC7765034 DOI: 10.3390/ani10122389] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/26/2020] [Accepted: 12/03/2020] [Indexed: 12/13/2022] Open
Abstract
Simple Summary There are diverse challenges in the poultry production industry that decrease the productivity and efficiency of poultry production, impair animal welfare, and pose issues to public health. Furthermore, the use of antibiotic growth promoters (AGP) in feed, which have been used to improve the growth performance and gut health of chickens, has been restricted in many countries. Tannins, polyphenolic compounds that precipitate proteins, are considered as alternatives for AGP in feed and provide solutions to mitigate challenges in poultry production due to their antimicrobial, antioxidant, anti-inflammatory and gut health promoting effects. However, because high dosages of tannins have antinutritional effects when fed to poultry, determining appropriate dosages of supplemental tannins is critical for their potential implementation as a solution for the challenges faced in poultry production. Abstract The poultry industry has an important role in producing sources of protein for the world, and the size of global poultry production continues to increase annually. However, the poultry industry is confronting diverse challenges including bacterial infection (salmonellosis), coccidiosis, oxidative stress, including that caused by heat stress, welfare issues such as food pad dermatitis (FPD) and nitrogen and greenhouse gasses emissions that cumulatively cause food safety issues, reduce the efficacy of poultry production, impair animal welfare, and induce environmental issues. Furthermore, restrictions on the use of AGP have exacerbated several of these negative effects. Tannins, polyphenolic compounds that possess a protein precipitation capacity, have been considered as antinutritional factors in the past because high dosages of tannins can decrease feed intake and negatively affect nutrient digestibility and absorption. However, tannins have been shown to have antimicrobial, antioxidant and anti-inflammatory properties, and as such, have gained interest as promising bioactive compounds to help alleviate the challenges of AGP removal in the poultry industry. In addition, the beneficial effects of tannins can be enhanced by several strategies including heat processing, combining tannins with other bioactive compounds, and encapsulation. As a result, supplementation of tannins alone or in conjunction with the above strategies could be an effective approach to decrease the need of AGP and otherwise improve poultry production efficiency.
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Li J, Zhao X. Effects of quorum sensing on the biofilm formation and viable but non-culturable state. Food Res Int 2020; 137:109742. [DOI: 10.1016/j.foodres.2020.109742] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/08/2020] [Accepted: 09/18/2020] [Indexed: 02/07/2023]
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Ibrahim YM, Abouwarda AM, Omar FA. Effect of kitasamycin and nitrofurantoin at subinhibitory concentrations on quorum sensing regulated traits of Chromobacterium violaceum. Antonie van Leeuwenhoek 2020; 113:1601-1615. [PMID: 32889593 DOI: 10.1007/s10482-020-01467-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 08/25/2020] [Indexed: 12/12/2022]
Abstract
Quorum sensing (QS) is a mechanism of intercellular communication in bacteria that received substantial attention as alternate strategy for combating bacterial resistance and the development of new anti-infective agents. The present investigation reports on the assessment of using subinhibitory concentrations of antibiotics for the inhibition of QS-regulated phenotypes in Chromobacterium violaceum. Primarily, the minimum inhibitory concentrations of a series of antibiotics were determined by a microdilution method. Subsequently, the inhibitory effects of selected antibiotics on QS-regulated traits, namely violacein and chitinase production, biofilm formation and motility were evaluated using C. violaceum CV026 and C. violaceum ATCC 12472. Results revealed that kitasamycin and nitrofurantoin exhibited the highest quorum sensing inhibitory (QSI) activity. The amount of violacein produced by C. violaceum was significantly reduced in the presence of either kitasamycin or nitrofurantoin. Moreover, the chitinolytic activity, biofilm formation, and motility were also impaired in kitasamycin or nitrofurantoin-treated cultures. We further confirmed QSI effects at the molecular level using molecular docking and real-time quantitative polymerase chain reaction (RT-qPCR). Results of molecular docking suggested that both antibiotics can interact with CviR transcriptional regulator of C. violaceum. Furthermore, RT-qPCR revealed the suppressive effect of kitasamycin and nitrofurantoin on five genes under the control of the CviI/CviR system: cviI, cviR, vioB, vioC, and vioD. Giving that kitasamycin and nitrofurantoin are being safely used for decades, this study emphasizes their potential application as antivirulence agents to disarm resistant bacterial strains, making their removal an easier task for the immune system or for another antibacterial agent.
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Affiliation(s)
- Yasser Musa Ibrahim
- Department of Microbiology, General Division of Basic Medical Sciences, National Organization for Drug Control and Research (NODCAR), Giza, 12611, Egypt.
| | - Ahmed Megahed Abouwarda
- Department of Microbiology, General Division of Basic Medical Sciences, National Organization for Drug Control and Research (NODCAR), Giza, 12611, Egypt
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Qian W, Yang M, Wang T, Sun Z, Liu M, Zhang J, Zeng Q, Cai C, Li Y. Antibacterial Mechanism of Vanillic Acid on Physiological, Morphological, and Biofilm Properties of Carbapenem-Resistant Enterobacter hormaechei. J Food Prot 2020; 83:576-583. [PMID: 31855457 DOI: 10.4315/jfp-19-469] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 11/28/2019] [Indexed: 12/13/2022]
Abstract
ABSTRACT Many studies have evaluated the antimicrobial activity of natural products against various microorganisms, but to our knowledge there have been no studies of the possible use of natural products for their antimicrobial activity against Enterobacter hormaechei. In this study, we investigated vanillic acid (VA) for its antimicrobial activities and its modes of action against carbapenem-resistant E. hormaechei (CREH). The MIC of VA against CREH was determined by the agar diffusion method. The antibacterial action of VA against CREH was elucidated by measuring variations in intracellular ATP concentration, intracellular pH, membrane potential, and cell morphology. Moreover, the efficacy of VA against biofilm formation and VA damage to CREH cells embedded in biofilms were further explored. Our results show that VA was effective against CREH with a MIC of 0.8 mg/mL. VA could rupture the cell membrane integrity of CREH, as measured by a decrease of intracellular ATP, pH, and membrane potential, along with distinctive alternations in cell morphology. In addition, VA exerted a remarkable inhibitory effect on the biofilm formation of CREH and also killed CREH cells within biofilms. These findings show that VA has a potent antibacterial and antibiofilm activity against CREH and, hence, has the potential to be used clinically as a novel candidate agent to treat CREH infections and in the food industry as a food preservative and surface disinfectant. HIGHLIGHTS
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Affiliation(s)
- Weidong Qian
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China.,(ORCID: https://orcid.org/0000-0003-4612-4351 [W.Q.])
| | - Min Yang
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Ting Wang
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Zhaohuan Sun
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Miao Liu
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Jianing Zhang
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Qiao Zeng
- Food Science and Bioengineering School, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China
| | - Changlong Cai
- Research Center of Ion Beam Biotechnology and Biodiversity, Xi'an Technological University, Xi'an 710032, People's Republic of China
| | - Yongdong Li
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, People's Republic of China
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14
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Deryabin D, Galadzhieva A, Kosyan D, Duskaev G. Plant-Derived Inhibitors of AHL-Mediated Quorum Sensing in Bacteria: Modes of Action. Int J Mol Sci 2019; 20:E5588. [PMID: 31717364 PMCID: PMC6888686 DOI: 10.3390/ijms20225588] [Citation(s) in RCA: 54] [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: 10/07/2019] [Revised: 11/02/2019] [Accepted: 11/06/2019] [Indexed: 12/15/2022] Open
Abstract
Numerous gram-negative phytopathogenic and zoopathogenic bacteria utilise acylated homoserine lactone (AHL) in communication systems, referred to as quorum sensing (QS), for induction of virulence factors and biofilm development. This phenomenon positions AHL-mediated QS as an attractive target for anti-infective therapy. This review focused on the most significant groups of plant-derived QS inhibitors and well-studied individual compounds for which in silico, in vitro and in vivo studies provide substantial knowledge about their modes of anti-QS activity. The current data about sulfur-containing compounds, monoterpenes and monoterpenoids, phenylpropanoids, benzoic acid derivatives, diarylheptanoids, coumarins, flavonoids and tannins were summarized; their plant sources, anti-QS effects and bioactivity mechanisms have also been summarized and discussed. Three variants of plant-derived molecules anti-QS strategies are proposed: (i) specific, via binding with LuxI-type AHL synthases and/or LuxR-type AHL receptor proteins, which have been shown for terpenes (carvacrol and l-carvone), phenylpropanoids (cinnamaldehyde and eugenol), flavonoid quercetin and ellagitannins; (ii) non-specific, by affecting the QS-related intracellular regulatory pathways by lowering regulatory small RNA expression (sulphur-containing compounds ajoene and iberin) or c-di-GMP metabolism reduction (coumarin); and (iii) indirect, via alteration of metabolic pathways involved in QS-dependent processes (vanillic acid and curcumin).
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Affiliation(s)
- Dmitry Deryabin
- Federal Scientific Center of Biological Systems and Agrotechnologies of RAS, Orenburg 460000, Russia; (A.G.); (D.K.); (G.D.)
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15
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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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16
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Sivasankar C, Jha NK, Ghosh R, Shetty PH. Anti quorum sensing and anti virulence activity of tannic acid and it's potential to breach resistance in Salmonella enterica Typhi / Paratyphi A clinical isolates. Microb Pathog 2019; 138:103813. [PMID: 31654777 DOI: 10.1016/j.micpath.2019.103813] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 09/16/2019] [Accepted: 10/18/2019] [Indexed: 11/28/2022]
Abstract
Salmonella enterica Typhi and Paratyphi A are food borne pathogens causing typhoid, which is one of the most important food borne disease in the developing world. S. Typhi and S. Paratyphi A are of much concern as multi drug resistance has been on the rise. The current study is aimed to screen phytochemicals for anti quorum sensing (QS) activity against S. Typhi and S. Paratyphi A. Upon screening with swarming assay, tannic acid (TA) showed highest anti-QS activity with minimal concentration of 400μg/ml. The anti-QS activity of TA was confirmed with C. violaceum ATCC 12,472. TA showed 38-43% and 35-50% of inhibition in cell surface hydrophobicity and EPS production respectively. Through FTIR analysis, it has been observed that EPS of treated cells has a considerable change in protein and peptide. TA has also exhibited drastic reduction in the surfactant production as high as 85-90%. Blood sensitivity and antibiotic sensitivity assay revealed that TA significantly sensitizes the S. Typhi and S. Paratyphi A cells to immune components in human blood and antibiotics. It has reduced the resistance of S. Typhi and S. Paratyphi A cells against amikacin, ampicillin, ciprofloxacin, azithromycin, chloramphenicol and gentamycin, thus revitalized the usage of these antibiotics against drug resistant S. Typhi and S. Paratyphi A infections. The consistency of anti-QS potential of TA was further evaluated and established with another eight clinical isolates of S. Typhi and S. Paratyphi A. Thus TA has been proved as a promising anti QS agent that can be developed as a therapeutic combination against S. Typhi and S. Paratyphi A.
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Affiliation(s)
- Chandran Sivasankar
- Department of Food Science and Technology, Pondicherry University, Puducherry, 605014, India
| | - Nisha Kumari Jha
- Department of Food Science and Technology, Pondicherry University, Puducherry, 605014, India
| | - Ruchira Ghosh
- Department of Food Science and Technology, Pondicherry University, Puducherry, 605014, India
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17
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Gu W, Sun M, Yang W, Wang L, Jiang Y, Wang C, Yang G. Effects of TCMs and Lactobacillus strains on immunosuppressed mice and bacteriostatic effect on Escherichia coli K88 after fermentation. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1659182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Wei Gu
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, PR China
- Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, PR China
- Shandong Provincial Key Laboratory of Animal Micro-Ecological Agent, Shandong BaoLai-LeeLai Bioengineering Co., Ltd, Tai’an, PR China
| | - Mingjie Sun
- Shandong Provincial Key Laboratory of Animal Micro-Ecological Agent, Shandong BaoLai-LeeLai Bioengineering Co., Ltd, Tai’an, PR China
| | - Wentao Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, PR China
- Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, PR China
| | - Lirong Wang
- Shandong Provincial Key Laboratory of Animal Micro-Ecological Agent, Shandong BaoLai-LeeLai Bioengineering Co., Ltd, Tai’an, PR China
| | - Yanlong Jiang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, PR China
- Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, PR China
| | - Chunfeng Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, PR China
- Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, PR China
| | - Guilian Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, PR China
- Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, PR China
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18
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Spennati F, Mora M, Tigini V, La China S, Di Gregorio S, Gabriel D, Munz G. Removal of Quebracho and Tara tannins in fungal bioreactors: Performance and biofilm stability analysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 231:137-145. [PMID: 30340133 DOI: 10.1016/j.jenvman.2018.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 08/27/2018] [Accepted: 10/01/2018] [Indexed: 06/08/2023]
Abstract
Tannins are polyphenolic compounds produced by plants that are used in the vegetable tanning of leather at industrial scale. Quebracho tannin and Tara tannin are intensively used by the tanning industry and are two of the most recalcitrant compounds that can be found in tannery wastewaters. In this study two reactors fed with Quebracho tannin and Tara tannin, respectively, were inoculated with polyurethane foam cubes colonized with a fungal strain biofilm of Aspergillus tubingensis MUT 990. A stable biofilm was maintained in the reactor fed with Quebracho tannin during 180 days of operation. Instead, biofilm got detached from the foam cubes during the start-up of the reactor fed with Tara tannin and a bacterial-based suspended culture was developed and preserved along the operational period (226 days). Soluble chemical oxygen demand removals up to 53% and 90% and maximum elimination capacities of 9.1 g sCOD m-3 h-1 and 37.9 g sCOD m-3 h-1 of Quebracho and Tara tannins, respectively, were achieved in the reactors without the addition of co-substrates. Next generation sequencing analysis for bacteria and fungi showed that a fungal consortium was developed in the reactor fed with Quebracho tannin while fungi were outcompeted by bacteria in the reactor fed with Tara tannin. Furthermore, Quebracho and Tara tannins were successfully co-treated in a single reactor where both fungi and bacteria were preserved.
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Affiliation(s)
- F Spennati
- Department of Environmental and Civil and Environmental, University of Florence, Via Santa Marta 3, 50139, Firenze, Italy.
| | - M Mora
- GENOCOV, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - V Tigini
- Department of Life Sciences and Systems Biology, University of Turin, Viale Mattioli 25, 10125, Torino, Italy
| | - S La China
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
| | - S Di Gregorio
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
| | - D Gabriel
- GENOCOV, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - G Munz
- Department of Environmental and Civil and Environmental, University of Florence, Via Santa Marta 3, 50139, Firenze, Italy
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19
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Joshi C, Patel P, Kothari V. Anti-infective potential of hydroalcoholic extract of Punica granatum peel against gram-negative bacterial pathogens. F1000Res 2019; 8:70. [PMID: 30828441 PMCID: PMC6392158 DOI: 10.12688/f1000research.17430.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/10/2019] [Indexed: 07/30/2023] Open
Abstract
Background: Punica granatum extracts have been prescribed in traditional medicine for management of a variety of disease conditions including microbial infections. Generation of scientific evidence for validation of P. granatum peel extract's anti-pathogenic efficacy is required. Methods: Hydroalcoholic extract of P. granatum peel (PGPE), prepared by microwave assisted extraction method was evaluated for its quorum-modulatory potential against two different human-pathogenic bacteria viz. Chromobacterium violaceum and Pseudomonas aeruginosa. Results: This extract was able to modulate in vitro production of quorum sensing-regulated pigments in both these test bacteria at ≥5 μg/ml. Virulence traits of P. aeruginosa like haemolytic activity, and biofilm formation were negatively affected by the test extract, and it also made P. aeruginosa more susceptible to lysis by human serum. Antibiotic susceptibility of both test bacteria was modulated owing to pre-treatment with PGPE. Exposure of these test pathogens to PGPE (≥0.5 μg/ml) effectively reduced their virulence towards the nematode Caenorhabditis elegans. Repeated subculturing of P. aeruginosa on PGPE-supplemented growth medium did not induce resistance to PGPE in this notorious pathogen, and this extract was also found to exert a post-extract effect on P. aeruginosa. Individual constituent phytocompounds of PGPE were found to be less efficacious than the whole extract. PGPE seemed to interfere with the signal-response machinery of P. aeruginosa and C. violaceum. PGPE also exhibited notable prebiotic potential by promoting growth of probiotic strains- Bifidobacterium bifidum and Lactobacillus plantarum at ≤50 μg/ml. Conclusions: This study indicates PGPE to be an effective antipathogenic and prebiotic preparation, and validates its therapeutic use mentioned in traditional medicine. This study also emphasizes the need for testing any bioactive extract at broadest possible concentration range, particularly in vivo, so that an accurate picture of dose-response relationship can emerge.
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Affiliation(s)
- Chinmayi Joshi
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Pooja Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Vijay Kothari
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
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20
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Joshi C, Patel P, Kothari V. Anti-infective potential of hydroalcoholic extract of Punica granatum peel against gram-negative bacterial pathogens. F1000Res 2019; 8:70. [PMID: 30828441 PMCID: PMC6392158 DOI: 10.12688/f1000research.17430.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/03/2019] [Indexed: 01/08/2023] Open
Abstract
Background:Punica granatum extracts have been prescribed in traditional medicine for management of a variety of disease conditions including microbial infections. Generation of scientific evidence for validation of P. granatum peel extract's anti-pathogenic efficacy is required. Methods: Hydroalcoholic extract of P. granatum peel (PGPE), prepared by microwave assisted extraction method was evaluated for its quorum-modulatory potential against two different human-pathogenic bacteria viz. Chromobacterium violaceum and Pseudomonas aeruginosa. Results: This extract was able to modulate in vitro production of quorum sensing-regulated pigments in both these test bacteria at ≥5 μg/ml. Virulence traits of P. aeruginosa like haemolytic activity, and biofilm formation were negatively affected by the test extract, and it also made P. aeruginosa more susceptible to lysis by human serum. Antibiotic susceptibility of both test bacteria was modulated owing to pre-treatment with PGPE. Exposure of these test pathogens to PGPE (≥0.5 μg/ml) effectively reduced their virulence towards the nematode Caenorhabditis elegans. Repeated subculturing of P. aeruginosa on PGPE-supplemented growth medium did not induce resistance to PGPE in this notorious pathogen, and this extract was also found to exert a post-extract effect on P. aeruginosa. Individual constituent phytocompounds of PGPE were found to be less efficacious than the whole extract. PGPE seemed to interfere with the signal-response machinery of P. aeruginosa and C. violaceum. PGPE also exhibited notable prebiotic potential by promoting growth of probiotic strains- Bifidobacterium bifidum and Lactobacillus plantarum at ≤50 μg/ml. Conclusions: This study indicates PGPE to be an effective antipathogenic and prebiotic preparation, and validates its therapeutic use mentioned in traditional medicine. This study also emphasizes the need for testing any bioactive extract at broadest possible concentration range, particularly in vivo, so that an accurate picture of dose-response relationship can emerge.
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Affiliation(s)
- Chinmayi Joshi
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Pooja Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Vijay Kothari
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
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21
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Shi C, Yan C, Sui Y, Sun Y, Guo D, Chen Y, Jin T, Peng X, Ma L, Xia X. Thymoquinone Inhibits Virulence Related Traits of Cronobacter sakazakii ATCC 29544 and Has Anti-biofilm Formation Potential. Front Microbiol 2017; 8:2220. [PMID: 29234307 PMCID: PMC5712421 DOI: 10.3389/fmicb.2017.02220] [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: 03/01/2017] [Accepted: 10/30/2017] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to determine whether thymoquinone, the principal active ingredient in the volatile oil of Nigella sativa seeds, could suppress certain virulence traits of Cronobacter sakazakii ATCC 29544 which contribute to infection. Sub-inhibitory concentrations of thymoquinone significantly decreased motility, quorum sensing, and endotoxin production of C. sakazakii ATCC 29544 and biofilm formation of C. sakazakii 7-17. Thymoquinone substantially reduced the adhesion and invasion of C. sakazakii ATCC 29544 to HT-29 cells and decreased the number of intracellular bacterial cells within the RAW 264.7 macrophage cells. Thymoquinone also repressed the transcription of sixteen genes involved in the virulence. These findings suggest that thymoquinone could attenuated virulence-related traits of C. sakazakii ATCC 29544, and its effects on other C. sakazakii strains and in vivo C. sakazakii infection need further investigation.
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Affiliation(s)
- Chao Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Chunhong Yan
- College of Animal Science and Technology, Northwest A&F University, Yangling, China.,School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Yue Sui
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Yi Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Du Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Yifei Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Tong Jin
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Xiaoli Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Linlin Ma
- Xi'An Yurun Agricultural Products Global Sourcing Co., LTD., Xi'an, China
| | - Xiaodong Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
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22
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Inhibition of Cronobacter sakazakii Virulence Factors by Citral. Sci Rep 2017; 7:43243. [PMID: 28233814 PMCID: PMC5324112 DOI: 10.1038/srep43243] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 01/20/2017] [Indexed: 12/01/2022] Open
Abstract
Cronobacter sakazakii is a foodborne pathogen associated with fatal forms of necrotizing enterocolitis, meningitis and sepsis in neonates and infants. The aim of this study was to determine whether citral, a major component of lemongrass oil, could suppress putative virulence factors of C. sakazakii that contribute to infection. Sub-inhibitory concentrations of citral significantly decreased motility, quorum sensing, biofilm formation and endotoxin production. Citral substantially reduced the adhesion and invasion of C. sakazakii to Caco-2 cells and decreased bacterial survival and replication within the RAW 264.7 macrophage cells. Citral also repressed the expression of eighteen genes involved in the virulence. These findings suggest that citral has potential to be developed as an alternative or supplemental agent to mitigate the infections caused by C. sakazakii.
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23
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Nana A, Nelson SB, McLaren A, Chen AF. What's New in Musculoskeletal Infection: Update on Biofilms. J Bone Joint Surg Am 2016; 98:1226-34. [PMID: 27440572 DOI: 10.2106/jbjs.16.00300] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Arvind Nana
- University of North Texas Health Science Center, Fort Worth, Texas
| | - Sandra B Nelson
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Alex McLaren
- Orthopaedic Surgery Residency, University of Arizona College of Medicine, Phoenix, Arizona
| | - Antonia F Chen
- Rothman Institute at Thomas Jefferson University, Sidney Kimmel Medical College, Philadelphia, Pennsylvania
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