1
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Yang Y, Kong X, Niu B, Yang J, Chen Q. Differences in Biofilm Formation of Listeria monocytogenes and Their Effects on Virulence and Drug Resistance of Different Strains. Foods 2024; 13:1076. [PMID: 38611380 PMCID: PMC11011679 DOI: 10.3390/foods13071076] [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: 02/07/2024] [Revised: 03/19/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
Listeria monocytogenes is recognized as one of the primary pathogens responsible for foodborne illnesses. The ability of L. monocytogenes to form biofilms notably increases its resistance to antibiotics such as ampicillin and tetracycline, making it exceedingly difficult to eradicate. Residual bacteria within the processing environment can contaminate food products, thereby posing a significant risk to public health. In this study, we used crystal violet staining to assess the biofilm-forming capacity of seven L. monocytogenes strains and identified ATCC 19112 as the strain with the most potent biofilm-forming. Subsequent fluorescence microscopy observations revealed that the biofilm-forming capacity was markedly enhanced after two days of culture. Then, we investigated into the factors contributing to biofilm formation and demonstrated that strains with more robust extracellular polymer secretion and self-agglutination capabilities exhibited a more pronounced ability to form biofilms. No significant correlation was found between surface hydrophobicity and biofilm formation capability. In addition, we found that after biofilm formation, the adhesion and invasion of cells were enhanced and drug resistance increased. Therefore, we hypothesized that the formation of biofilm makes L. monocytogenes more virulent and more difficult to remove by antibiotics. Lastly, utilizing RT-PCR, we detected the expression levels of genes associated with biofilm formation, including those involved in quorum sensing (QS), flagellar synthesis, and extracellular polymer production. These genes were significantly upregulated after biofilm formation. These findings underscore the critical relationship between extracellular polymers, self-agglutination abilities, and biofilm formation. In conclusion, the establishment of biofilms not only enhances L. monocytogenes' capacity for cell invasion and adhesion but also significantly increases its resistance to drugs, presenting a substantial threat to food safety.
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Affiliation(s)
- Yujuan Yang
- School of Life Sciences, Shanghai University, Shanghai 200444, China; (Y.Y.); (B.N.)
| | - Xiangxiang Kong
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China;
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Bing Niu
- School of Life Sciences, Shanghai University, Shanghai 200444, China; (Y.Y.); (B.N.)
| | - Jielin Yang
- Technical Centre for Animal, Plant and Food Inspection and Quarantine of Shanghai Customs, Shanghai 200135, China
| | - Qin Chen
- School of Life Sciences, Shanghai University, Shanghai 200444, China; (Y.Y.); (B.N.)
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2
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Payá G, Bautista V, Pastor-Soler S, Camacho M, Esclapez J, Bonete MJ. Analysis of Lsm Protein-Mediated Regulation in the Haloarchaeon Haloferax mediterranei. Int J Mol Sci 2024; 25:580. [PMID: 38203750 PMCID: PMC10779274 DOI: 10.3390/ijms25010580] [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: 10/05/2023] [Revised: 12/20/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
The Sm protein superfamily includes Sm, like-Sm (Lsm), and Hfq found in the Eukarya, Archaea, and Bacteria domains. Archaeal Lsm proteins have been shown to bind sRNAs and are probably involved in various cellular processes, suggesting a similar function in regulating sRNAs by Hfq in bacteria. Moreover, archaeal Lsm proteins probably represent the ancestral Lsm domain from which eukaryotic Sm proteins have evolved. In this work, Haloferax mediterranei was used as a model organism because it has been widely used to investigate the nitrogen cycle and its regulation in Haloarchaea. Predicting this protein's secondary and tertiary structures has resulted in a three-dimensional model like the solved Lsm protein structure of Archaeoglobus fulgidus. To obtain information on the oligomerization state of the protein, homologous overexpression and purification by means of molecular exclusion chromatography have been performed. The results show that this protein can form hexameric complexes, which can aggregate into 6 or 12 hexameric rings depending on the NaCl concentration and without RNA. In addition, the study of transcriptional expression via microarrays has allowed us to obtain the target genes regulated by the Lsm protein under nutritional stress conditions: nitrogen or carbon starvation. Microarray analysis has shown the first universal stress proteins (USP) in this microorganism that mediate survival in situations of nitrogen deficiency.
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Affiliation(s)
| | | | | | | | | | - María-José Bonete
- Department of Biochemistry and Molecular Biology and Soil Science and Agricultural Chemistry, Faculty of Science, University of Alicante, Ap 99, 03080 Alicante, Spain; (G.P.); (V.B.); (S.P.-S.); (M.C.); (J.E.)
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3
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Marra D, Karapantsios T, Caserta S, Secchi E, Holynska M, Labarthe S, Polizzi B, Ortega S, Kostoglou M, Lasseur C, Karapanagiotis I, Lecuyer S, Bridier A, Noirot-Gros MF, Briandet R. Migration of surface-associated microbial communities in spaceflight habitats. Biofilm 2023; 5:100109. [PMID: 36909662 PMCID: PMC9999172 DOI: 10.1016/j.bioflm.2023.100109] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 02/05/2023] [Accepted: 02/17/2023] [Indexed: 02/26/2023] Open
Abstract
Astronauts are spending longer periods locked up in ships or stations for scientific and exploration spatial missions. The International Space Station (ISS) has been inhabited continuously for more than 20 years and the duration of space stays by crews could lengthen with the objectives of human presence on the moon and Mars. If the environment of these space habitats is designed for the comfort of astronauts, it is also conducive to other forms of life such as embarked microorganisms. The latter, most often associated with surfaces in the form of biofilm, have been implicated in significant degradation of the functionality of pieces of equipment in space habitats. The most recent research suggests that microgravity could increase the persistence, resistance and virulence of pathogenic microorganisms detected in these communities, endangering the health of astronauts and potentially jeopardizing long-duration manned missions. In this review, we describe the mechanisms and dynamics of installation and propagation of these microbial communities associated with surfaces (spatial migration), as well as long-term processes of adaptation and evolution in these extreme environments (phenotypic and genetic migration), with special reference to human health. We also discuss the means of control envisaged to allow a lasting cohabitation between these vibrant microscopic passengers and the astronauts.
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Affiliation(s)
- Daniele Marra
- Department of Chemical, Materials and Industrial Production Engineering (DICMaPi), University of Naples, Federico II, Piazzale Tecchio 80, 80125, Naples, Italy
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore, 486, 80145, Naples, Italy
| | - Thodoris Karapantsios
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece
| | - Sergio Caserta
- Department of Chemical, Materials and Industrial Production Engineering (DICMaPi), University of Naples, Federico II, Piazzale Tecchio 80, 80125, Naples, Italy
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore, 486, 80145, Naples, Italy
| | - Eleonora Secchi
- Department of Civil, Environmental and Geomatic Engineering, Institute of Environmental Engineering, ETH Zurich, 8093, Zurich, Switzerland
| | | | - Simon Labarthe
- University of Bordeaux, IMB, UMR 5251, CNRS, IMB, Memphis Team, INRIA, Talence, France
| | - Bastien Polizzi
- Laboratoire de Mathématiques de Besançon, Université Bourgogne Franche-Comté, CNRS UMR-6623, Besançon, France
| | | | - Margaritis Kostoglou
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece
| | | | - Ioannis Karapanagiotis
- Division of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, University Box 116, 541 24, Thessaloniki, Greece
| | | | - Arnaud Bridier
- Fougères Laboratory, Antibiotics, Biocides, Residues and Resistance Unit, ANSES, Fougères, France
| | | | - Romain Briandet
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
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4
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Tepavčević J, Yarrington K, Fung B, Lin X, Visick KL. sRNA chaperone Hfq controls bioluminescence and other phenotypes through Qrr1-dependent and -independent mechanisms in Vibrio fischeri. Gene X 2022; 809:146048. [PMID: 34756963 PMCID: PMC8673744 DOI: 10.1016/j.gene.2021.146048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 10/26/2021] [Indexed: 02/01/2023] Open
Abstract
Colonization of the squid Euprymna scolopes by the bacterium Vibrio fischeri depends on bacterial biofilm formation, motility, and bioluminescence. Previous work has demonstrated an inhibitory role for the small RNA (sRNA) Qrr1 in quorum-induced bioluminescence of V. fischeri, but the contribution of the corresponding sRNA chaperone, Hfq, was not examined. We thus hypothesized that V. fischeri Hfq similarly functions to inhibit bacterial bioluminescence as well as regulate other key steps of symbiosis, including bacterial biofilm formation and motility. Surprisingly, deletion of hfq increased luminescence of V. fischeri beyond what was observed for the loss of qrr1 sRNA. Epistasis experiments revealed that, while Hfq contributes to the Qrr1-dependent regulation of light production, it also functions independently of Qrr1 and its downstream target, LitR. This Hfq-dependent, Qrr1-independent regulation of bioluminescence is also independent of the major repressor of light production in V. fischeri, ArcA. We further determined that Hfq is required for full motility of V. fischeri in a mechanism that partially depends on the Qrr1/LitR regulators. Finally, Hfq also appears to function in the control of biofilm formation: loss of Hfq delayed the timing and diminished the extent of wrinkled colony development, but did not eliminate the production of SYP-polysaccharide-dependent cohesive colonies. Furthermore, loss of Hfq enhanced production of cellulose and resulted in increased Congo red binding. Together, these findings point to Hfq as an important regulator of multiple phenotypes relevant to symbiosis between V. fischeri and its squid host.
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Affiliation(s)
- Jovanka Tepavčević
- Department of Biology, Wheaton College, Wheaton, Illinois, USA,Corresponding author
| | - Kaiti Yarrington
- Department of Microbiology and Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Brittany Fung
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, Illinois
| | - Xijin Lin
- Department of Biology, Wheaton College, Wheaton, Illinois, USA
| | - Karen L. Visick
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, Illinois
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5
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Differential Chromosome- and Plasmid-Borne Resistance of Escherichia coli hfq Mutants to High Concentrations of Various Antibiotics. Int J Mol Sci 2021; 22:ijms22168886. [PMID: 34445592 PMCID: PMC8396180 DOI: 10.3390/ijms22168886] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 12/14/2022] Open
Abstract
The Hfq protein is a bacterial RNA chaperone, involved in many molecular interactions, including control of actions of various small RNA regulatory molecules. We found that the presence of Hfq was required for survival of plasmid-containing Escherichia coli cells against high concentrations of chloramphenicol (plasmid p27cmr), tetracycline (pSC101, pBR322) and ampicillin (pBR322), as hfq+ strains were more resistant to these antibiotics than the hfq-null mutant. In striking contrast, production of Hfq resulted in low resistance to high concentrations of kanamycin when the antibiotic-resistance marker was chromosome-borne, with deletion of hfq resulting in increasing bacterial survival. These results were observed both in solid and liquid medium, suggesting that antibiotic resistance is an intrinsic feature of these strains rather than a consequence of adaptation. Despite its major role as RNA chaperone, which also affects mRNA stability, Hfq was not found to significantly affect kan and tet mRNAs turnover. Nevertheless, kan mRNA steady-state levels were higher in the hfq-null mutant compared to the hfq+ strain, suggesting that Hfq can act as a repressor of kan expression.This observation does correlate with the enhanced resistance to high levels of kanamycin observed in the hfq-null mutant. Furthermore, dependency on Hfq for resistance to high doses of tetracycline was found to depend on plasmid copy number, which was only observed when the resistance marker was expressed from a low copy plasmid (pSC101) but not from a medium copy plasmid (pBR322). This suggests that Hfq may influence survival against high doses of antibiotics through mechanisms that remain to be determined. Studies with pBR322Δrom may also suggest an interplay between Hfq and Rom in the regulation of ColE1-like plasmid replication. Results of experiments with a mutant devoid of the part of the hfq gene coding for the C-terminal region of Hfq suggested that this region, as well as the N-terminal region, may be involved in the regulation of expression of antibiotic resistance in E. coli independently.
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6
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Payá G, Bautista V, Camacho M, Bonete MJ, Esclapez J. Functional analysis of Lsm protein under multiple stress conditions in the extreme haloarchaeon Haloferax mediterranei. Biochimie 2021; 187:33-47. [PMID: 33992715 DOI: 10.1016/j.biochi.2021.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 05/03/2021] [Accepted: 05/04/2021] [Indexed: 01/24/2023]
Abstract
The Sm, like-Sm, and Hfq proteins belonging to the Sm superfamily of proteins are represented in all domains of life. These proteins are involved in several RNA metabolism pathways. The functions of bacterial Hfq and eukaryotic Sm proteins have been described, but knowledge about the in vivo functions of archaeal Sm proteins remains limited. This study aims to improve the understanding of Lsm proteins and their role using the haloarchaeon Haloferax mediterranei as a model microorganism. The Haloferax mediterranei genome contains one lsm gene that overlaps with the rpl37e gene. To determine the expression of lsm and rpl37e genes and the co-transcription of both, reverse transcription-polymerase chain reaction (RT-PCR) analyses were performed under different standard and stress conditions. The results suggest that the expression of lsm and rpl37e is constitutive. Co-transcription occurs at sub-optimal salt concentrations and temperatures, depending on the growth phase. The halophilic Lsm protein contains two Sm motifs, Sm1 and Sm2, and the sequence encoding the Sm2 motif also constitutes the promoter of the rpl37e gene. To investigate their biological functions, the lsm deletion mutant and the Sm1 motif deletion mutant, where the Sm2 motif remained intact, were generated and characterised. Comparison of the lsm deletion mutant, Sm1 deletion mutant, and the parental strain HM26 under standard and stress growth conditions revealed growth differences. Finally, swarming assays in complex and defined media showed greater swarming capacity in the deletion mutants.
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Affiliation(s)
- Gloria Payá
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Area, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain.
| | - Vanesa Bautista
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Area, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain.
| | - Mónica Camacho
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Area, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain.
| | - María-José Bonete
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Area, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain.
| | - Julia Esclapez
- Agrochemistry and Biochemistry Department, Biochemistry and Molecular Biology Area, Faculty of Science, University of Alicante, Ap 99, 03080, Alicante, Spain.
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7
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Meng F, Zhu T, Yao H, Ling Z, Feng Y, Li G, Li J, Sun X, Chen J, Meng C, Jiao X, Yin Y. A Cross-Protective Vaccine Against 4b and 1/2b Listeria monocytogenes. Front Microbiol 2020; 11:569544. [PMID: 33362730 PMCID: PMC7759533 DOI: 10.3389/fmicb.2020.569544] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 10/19/2020] [Indexed: 12/26/2022] Open
Abstract
Listeria monocytogenes (Lm) is a foodborne zoonotic pathogen that causes listeriosis with a mortality rate of 20-30%. Serovar 4b and 1/2b isolates account for most of listeriosis outbreaks, however, no listeriosis vaccine is available for either prophylactic or therapeutic use. Here, we developed a triple-virulence-genes deletion vaccine strain, and evaluated its safety, immunogenicity, and cross-protective efficiency. The virulence of NTSNΔactA/plcB/orfX was reduced 794-folds compared with the parental strain. Additionally, it was completely eliminated in mice at day 7 post infection and no obvious pathological changes were observed in the organs of mice after prime-boost immunization for 23 days. These results proved that the safety of the Lm vaccine strain remarkably increased. More importantly, the NTSNΔactA/plcB/orfX strain stimulated higher anti-Listeriolysin O (LLO) antibodies, induced significantly higher expression of IFN-γ, TNF-α, IL-17, and IL-6 than the control group, and afforded 100% protection against serovar 4b and 1/2b challenges. Taken together, our research demonstrates that the triple-genes-deletion vaccine has high safety, can elicit strong Th1 type immune response, and affords efficient cross-protection against two serovar Lm strains. It is a promising vaccine for prevention of listeriosis.
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Affiliation(s)
- Fanzeng Meng
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Tengfei Zhu
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Hao Yao
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Zhiting Ling
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Youwei Feng
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Guo Li
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Jing Li
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Xinyu Sun
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Jiaqi Chen
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Chuang Meng
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Xin'an Jiao
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Yuelan Yin
- Jangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China.,Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, The Ministry of Agriculture of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
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8
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Ramires T, Kleinubing NR, Iglesias MA, Vitola HRS, Núncio ASP, Kroning IS, Moreira GMSG, Fiorentini ÂM, da Silva WP. Genetic diversity, biofilm and virulence characteristics of Listeria monocytogenes in salmon sushi. Food Res Int 2020; 140:109871. [PMID: 33648189 DOI: 10.1016/j.foodres.2020.109871] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 10/26/2020] [Accepted: 10/28/2020] [Indexed: 11/18/2022]
Abstract
Sushi is a ready-to-eat (RTE) food prepared from raw or cooked fish that is widely consumed worldwide. Listeria monocytogenes is the foodborne pathogen most commonly associated with RTE and fish products. The aim of the present study was to evaluate the presence of L. monocytogenes in salmon sushi commercialized in Pelotas city, Brazil, and to evaluate the genetic diversity, biofilm-forming ability in stainless steel, and virulence characteristics of the isolates. Four sampling events were carried out in seven specialized sushi establishments totaling 28 sushi pools. Listeria monocytogenes was detected in six samples (21.4%) from two establishments (28.6%). All isolates belonged to serotype 4b and carried the prfA, plcA, plcB, hlyA, mpl, actA, inlA, inlC, inlJ, and iap genes. The inlB gene was not detected in two isolates. The PFGE analysis grouped the isolates into four pulsotypes. All isolates had the ability to form biofilm on stainless steel and the average of biofilm formation counts varied between 6.4 and 7.2 log CFU.cm-2. The isolates harbored the biofilm-related genes agrA, agrB, agrC, agrD, and prfA, with the exception of two isolates that did not harbor the agrD gene. The presence of L. monocytogenes in RTE sushi is a concern, demonstrating that sushi consumption may be a risk of human listeriosis. Furthermore, it was possible to identify the persistence of this pathogen for at least one month (pulsotypes III and IV), in two establishments (A and G), highlighting the need for improving the cleaning and sanitation procedures in establishments that commercialize RTE sushi.
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Affiliation(s)
- Tassiana Ramires
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Natalie Rauber Kleinubing
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Mariana Almeida Iglesias
- Center of Technological Development, Biotechnology Department, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Helena Reissig Soares Vitola
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Adriana Souto Pereira Núncio
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Isabela Schneid Kroning
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | | | - Ângela Maria Fiorentini
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Wladimir Padilha da Silva
- Department of Agroindustrial Science and Technology, Faculty of Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil; Center of Technological Development, Biotechnology Department, Federal University of Pelotas, Pelotas, RS, Brazil.
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9
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Srivastava S, Sharma SK, Srivastava V, Kumar A. Proteomic Exploration of Listeria monocytogenes for the Purpose of Vaccine Designing Using a Reverse Vaccinology Approach. Int J Pept Res Ther 2020; 27:779-799. [PMID: 33144851 PMCID: PMC7595573 DOI: 10.1007/s10989-020-10128-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/22/2020] [Indexed: 12/14/2022]
Abstract
Listeriosis is a major foodborne infection provoked by a bacterium known as Listeria monocytogenes. It is one of the predominant causes of death in pregnant women, infants, and immunocompromised persons. Despite such fatal effects, until now there is no proper medication or drug available for such a serious foodborne infection. One of the most promising ways to deal with this challenge is vaccination. This present study aims at the prediction of B cell epitopes for subunit vaccine designing against Listeria monocytogenes using a reverse vaccinology approach. Among screened out 299 epitopes of strain F2365 of Listeria monocytogenes, based on the VaxiJen score, the top 20 epitopes were selected. 3D modeling of epitopes and alleles was generated by PEPstrMOD and Swiss Model respectively. Molecular docking reveals 4 epitopes viz., MKFLFPLKL, CEETFGIRL, FLKIDPPIL, and VRHHGGGHK based on binding energy. All 4 epitopes were investigated for non-toxicity, binding affinity, and population coverage. After vigorous investigation, epitope FLKIDPPIL was anticipated as the best vaccine contender. The stability of the FLKIDPPIL-HLA DRB1 _0101 complex was proved by performing the simulation. Here, predicted peptide through the Insilico approach may become a potential remedy against listeriosis, after the wet-lab approach and clinical trials.
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Affiliation(s)
- Shivani Srivastava
- Department of Biotechnology, Faculty of Engineering and Technology, Rama University Uttar Pradesh, Kanpur, 209217 India
| | - Suraj Kumar Sharma
- Department of Biotechnology, Faculty of Engineering and Technology, Rama University Uttar Pradesh, Kanpur, 209217 India
| | - Vivek Srivastava
- Department of Biotechnology, Faculty of Engineering and Technology, Rama University Uttar Pradesh, Kanpur, 209217 India
| | - Ajay Kumar
- Department of Biotechnology, Faculty of Engineering and Technology, Rama University Uttar Pradesh, Kanpur, 209217 India
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10
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Liu Y, Sun W, Sun T, Gorris LGM, Wang X, Liu B, Dong Q. The prevalence of Listeria monocytogenes in meat products in China: A systematic literature review and novel meta-analysis approach. Int J Food Microbiol 2019; 312:108358. [PMID: 31655356 DOI: 10.1016/j.ijfoodmicro.2019.108358] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 06/11/2019] [Accepted: 09/08/2019] [Indexed: 01/19/2023]
Abstract
Meat products are commonly regarded as one of the main sources of human listeriosis caused by Listeria monocytogenes. The objective of this study was to estimate the prevalence of L. monocytogenes in a range of meat products from 24 different Chinese regions by using meta-analysis of literature data and a novel sensitivity analysis approach. A total of 112 publications from five databases, published between 1 January 2007 and 31 December 2017, were systematically selected for relevance and covered meat products sampled between 2000 and 2016. Estimated by the random-effects model, the pooled prevalence of L. monocytogenes was 8.5% (95% CI: 7.1%-10.3%) in raw meats and 3.2% (95% CI: 2.7%-3.9%) in ready-to-eat (RTE) meats. The prevalence differed from high to low among raw meats including prefabricated raw meats 12.6% (95% CI: 6.9%-21.7%), fresh pork 11.4% (95% CI: 8.6%-14.9%), fresh beef 9.1% (95% CI: 6.3%-13.0%), fresh poultry 7.2% (95% CI:4.9%-10.4%), frozen raw meats 7.2% (95% CI: 5.7%-9.0%), and fresh mutton 5.4% (95% CI: 2.5%-11.0%). A higher L. monocytogenes prevalence level was shown in the meat products from central and northeastern China provincial regions. The entropy-based sensitivity analysis utilized in the meta-analysis indicated that the sampling period and location were two critical factors influencing the prevalence level of L. monocytogenes in meat products. A better understanding of differences in prevalence levels per geographic region and between meat product sources may allow the competent authorities, industry, and other relevant stakeholders to tailor their interventions to control the occurrence of L. monocytogenes in meat products effectively.
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Affiliation(s)
- Yangtai Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Wanxia Sun
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Tianmei Sun
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Leon G M Gorris
- Unilever R&D, Olivier van Noortlaan 120, 3133 AT Vlaardingen, Netherlands
| | - Xiang Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Baolin Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China.
| | - Qingli Dong
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China.
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11
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Cai Q, Wang G, Li Z, Zhang L, Fu Y, Yang X, Lin W, Lin X. SWATH based quantitative proteomics analysis reveals Hfq2 play an important role on pleiotropic physiological functions in Aeromonas hydrophila. J Proteomics 2019; 195:1-10. [DOI: 10.1016/j.jprot.2018.12.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/15/2018] [Accepted: 12/26/2018] [Indexed: 12/14/2022]
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