401
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Gaines A, Ludovice M, Xu J, Zanghi M, Meinersmann RJ, Berrang M, Daley W, Britton D. The dialogue between protozoa and bacteria in a microfluidic device. PLoS One 2019; 14:e0222484. [PMID: 31596855 PMCID: PMC6784911 DOI: 10.1371/journal.pone.0222484] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/30/2019] [Indexed: 01/28/2023] Open
Abstract
In nature, protozoa play a major role in controlling bacterial populations. This paper proposes a microfluidic device for the study of protozoa behaviors change due to their chemotactic response in the presence of bacterial cells. A three-channel microfluidic device was designed using a nitrocellulose membrane into which channels were cut using a laser cutter. The membrane was sandwiched between two glass slides; a Euglena suspension was then allowed to flow through the central channel. The two side channels were filled with either, 0.1% peptone as a negative control, or a Listeria suspension respectively. The membrane design prevented direct interaction but allowed Euglena cells to detect Listeria cells as secretions diffused through the nitrocellulose membrane. A significant number of Euglena cells migrated toward the chambers near the bacterial cells, indicating a positive chemotactic response of Euglena toward chemical cues released from Listeria cells. Filtrates collected from Listeria suspension with a series of molecular weight cutoffs (3k, 10k and 100k) were examined in Euglena chemotaxis tests. Euglena cells were attracted to all filtrates collected from the membrane filtration with different molecular weight cutoffs, suggesting small molecules from Listeria might be the chemical cues to attract protozoa. Headspace volatile organic compounds (VOC) released from Listeria were collected, spiked to 0.1% peptone and tested as the chemotactic effectors. It was discovered that the Euglena cells responded quickly to Listeria VOCs including decanal, 3,5- dimethylbenzaldehyde, ethyl acetate, indicating bacterial VOCs were used by Euglena to track the location of bacteria.
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Affiliation(s)
- Anna Gaines
- Aerospace, Transportation and Advanced Systems Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Miranda Ludovice
- Aerospace, Transportation and Advanced Systems Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Jie Xu
- Aerospace, Transportation and Advanced Systems Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Marc Zanghi
- Aerospace, Transportation and Advanced Systems Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Richard J. Meinersmann
- Richard B. Russell Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, Georgia, United States of America
| | - Mark Berrang
- Richard B. Russell Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, Georgia, United States of America
| | - Wayne Daley
- Aerospace, Transportation and Advanced Systems Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Doug Britton
- Aerospace, Transportation and Advanced Systems Laboratory, Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, United States of America
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402
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Chakravarty S, Massé E. RNA-Dependent Regulation of Virulence in Pathogenic Bacteria. Front Cell Infect Microbiol 2019; 9:337. [PMID: 31649894 PMCID: PMC6794450 DOI: 10.3389/fcimb.2019.00337] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/18/2019] [Indexed: 12/19/2022] Open
Abstract
During infection, bacterial pathogens successfully sense, respond and adapt to a myriad of harsh environments presented by the mammalian host. This exquisite level of adaptation requires a robust modulation of their physiological and metabolic features. Additionally, virulence determinants, which include host invasion, colonization and survival despite the host's immune responses and antimicrobial therapy, must be optimally orchestrated by the pathogen at all times during infection. This can only be achieved by tight coordination of gene expression. A large body of evidence implicate the prolific roles played by bacterial regulatory RNAs in mediating gene expression both at the transcriptional and post-transcriptional levels. This review describes mechanistic and regulatory aspects of bacterial regulatory RNAs and highlights how these molecules increase virulence efficiency in human pathogens. As illustrative examples, Staphylococcus aureus, Listeria monocytogenes, the uropathogenic strain of Escherichia coli, Helicobacter pylori, and Pseudomonas aeruginosa have been selected.
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Affiliation(s)
- Shubham Chakravarty
- RNA Group, Department of Biochemistry, Faculty of Medicine and Health Sciences, CRCHUS, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Eric Massé
- RNA Group, Department of Biochemistry, Faculty of Medicine and Health Sciences, CRCHUS, University of Sherbrooke, Sherbrooke, QC, Canada
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403
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Cabal A, Pietzka A, Huhulescu S, Allerberger F, Ruppitsch W, Schmid D. Isolate-Based Surveillance of Listeria monocytogenes by Whole Genome Sequencing in Austria. Front Microbiol 2019; 10:2282. [PMID: 31632381 PMCID: PMC6779813 DOI: 10.3389/fmicb.2019.02282] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 09/18/2019] [Indexed: 11/18/2022] Open
Abstract
Listeria monocytogenes (L. monocytogenes) is a ubiquitous organism that can easily enter the food chain. Infection with L. monocytogenes can cause invasive listeriosis. Since 2014, in Austria, L. monocytogenes isolates from human and food/food-associated samples have been provided on a mandatory basis by food producers and laboratories to the National Reference Laboratory. Since 2017, isolates undergo routinely whole genome sequencing (WGS) and core genome Multilocus Sequence Typing (cgMLST) for cluster analyses. Aims of this study were to characterize isolates and clusters of 2017 by using WGS data and to assess the usefulness of this isolate-based surveillance for generating hypotheses on sources of invasive listeriosis in real-time. WGS data from 31 human and 1744 non-human isolates originating from 2017, were eligible for the study. A cgMLST-cluster was defined as two or more isolates differing by ≤10 alleles. We extracted the sequence types (STs) from the WGS data and analyzed the food subcategories meat, fish, vegetable and diary for associations with the ten most prevalent STs among food, through calculating prevalence ratios (PR) with 95% confidence intervals (CI). The three most frequent STs among the human isolates were ST1 (7/31; 22.6%), ST155 (4/31; 12.9%) and ST451 (3/31; 9.7%) and among the non-human isolates ST451 (614/1744; 35.2%), ST8 (173/1744, 10.0%) and ST9 (117/1744; 6.7%). We found ST21 associated with vegetables (PR: 11.39, 95% CI: 8.32–15.59), ST121 and ST155 with fish (PR: 7.05, 95% CI: 4.88–10.17, PR: 3.29, 95% CI: 1.86–5.82), and ST511, ST7 and ST451 with dairy products (PR: 8.55, 95% CI: 6.65–10.99; PR: 5.05, 95% CI: 3.83–6.66, PR: 3.03, 95% CI: 2.02–4.55). We identified 132 cgMLST-clusters. Six clusters contained human isolates (ST155, ST1, ST101, ST177, ST37 and ST7) and for five of those cgMLST-based cluster analyses solely was able to hypothesize the source: an Austrian meat processing company, two Austrian cheese manufacturers and two vegetable processing companies, one based in Austria and the other in Belgium. Determining routinely STs in food isolates by WGS allows to associate STs with food products. Real-time WGS of L. monocytogenes isolates provided mandatorily, proved to be useful in promptly generating hypotheses on sources of invasive listeriosis.
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Affiliation(s)
- Adriana Cabal
- Austrian National Reference Centre for Listeria, Austrian Agency for Health and Food Safety, Vienna, Austria.,European Public Health Microbiology Training Programme (EUPHEM), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Ariane Pietzka
- Austrian National Reference Centre for Listeria, Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Steliana Huhulescu
- Austrian National Reference Centre for Listeria, Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Franz Allerberger
- Austrian National Reference Centre for Listeria, Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Werner Ruppitsch
- Austrian National Reference Centre for Listeria, Austrian Agency for Health and Food Safety, Vienna, Austria
| | - Daniela Schmid
- Austrian National Reference Centre for Listeria, Austrian Agency for Health and Food Safety, Vienna, Austria
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404
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Yin Y, Yao H, Doijad S, Kong S, Shen Y, Cai X, Tan W, Wang Y, Feng Y, Ling Z, Wang G, Hu Y, Lian K, Sun X, Liu Y, Wang C, Jiao K, Liu G, Song R, Chen X, Pan Z, Loessner MJ, Chakraborty T, Jiao X. A hybrid sub-lineage of Listeria monocytogenes comprising hypervirulent isolates. Nat Commun 2019; 10:4283. [PMID: 31570766 PMCID: PMC6768887 DOI: 10.1038/s41467-019-12072-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/19/2019] [Indexed: 11/20/2022] Open
Abstract
The foodborne pathogen Listeria monocytogenes (Lm) is a highly heterogeneous species and currently comprises of 4 evolutionarily distinct lineages. Here, we characterize isolates from severe ovine listeriosis outbreaks that represent a hybrid sub-lineage of the major lineage II (HSL-II) and serotype 4h. HSL-II isolates are highly virulent and exhibit higher organ colonization capacities than well-characterized hypervirulent strains of Lm in an orogastric mouse infection model. The isolates harbour both the Lm Pathogenicity Island (LIPI)-1 and a truncated LIPI-2 locus, encoding sphingomyelinase (SmcL), a virulence factor required for invasion and bacterial translocation from the gut, and other non-contiguous chromosomal segments from another pathogenic species, L. ivanovii. HSL-II isolates exhibit a unique wall teichoic acid (WTA) structure essential for resistance to antimicrobial peptides, bacterial invasion and virulence. The discovery of isolates harbouring pan-species virulence genes of the genus Listeria warrants global efforts to identify further hypervirulent lineages of Lm.
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Affiliation(s)
- Yuelan Yin
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China.
| | - Hao Yao
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Swapnil Doijad
- Institute of Medical Microbiology, Justus-Liebig University, Giessen, 35394, Germany
- German Center for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Campus Gießen, Justus-Liebig University, Gießen, 35394, Germany
| | - Suwei Kong
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Yang Shen
- Laboratory of Food Microbiology, Institute of Food, Nutrition and Health, ETH Zurich, 8092, Zurich, Switzerland
| | - Xuexue Cai
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Weijun Tan
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Yuting Wang
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Youwei Feng
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Zhiting Ling
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Guoliang Wang
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Yachen Hu
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Kai Lian
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Xinyu Sun
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Yuliang Liu
- China Animal Disease Control Center, No.17 Tiangui Street, Daxing District, 102618, Beijing, China
| | - Chuanbin Wang
- China Animal Disease Control Center, No.17 Tiangui Street, Daxing District, 102618, Beijing, China
| | - Kuhua Jiao
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Guoping Liu
- Xuyi Center for Animal Disease Control and Prevention, Xuyi City, Jiangsu Province, China
| | - Ruilong Song
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Xiang Chen
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Zhiming Pan
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China
| | - Martin J Loessner
- Laboratory of Food Microbiology, Institute of Food, Nutrition and Health, ETH Zurich, 8092, Zurich, Switzerland
| | - Trinad Chakraborty
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China.
- Institute of Medical Microbiology, Justus-Liebig University, Giessen, 35394, Germany.
- German Center for Infection Research (DZIF), Partner Site Gießen-Marburg-Langen, Campus Gießen, Justus-Liebig University, Gießen, 35394, Germany.
| | - Xin'an Jiao
- Jiangsu Key Laboratory of Zoonosis, Key Laboratory of Prevention and Control of Biological Hazard Factors (Animal Origin) for Agrifood Safety and Quality, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu Province, China.
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405
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Chen S, Meng F, Sun X, Yao H, Wang Y, Pan Z, Yin Y, Jiao X. Epidemiology of Human Listeriosis in China During 2008-2017. Foodborne Pathog Dis 2019; 17:119-125. [PMID: 31556722 DOI: 10.1089/fpd.2019.2683] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Listeria monocytogenes is a facultative, intracellular foodborne pathogen that causes listeriosis and is prevalent worldwide. However, our knowledge of this bacterium and the listeriosis it causes is still extremely limited until now. Therefore, this retrospective study of patients in mainland China over 10 years (2008-2017) was performed to better understand the demographic trends and clinical features of listeriosis in China. Both electronic and manual retrieval systems were used to collect the relevant literature on listeriosis in mainland China. A total of 759 cases were reported from 22 provinces. Among the clinical cases, septicemia was the most common presentation (49%), followed by central nervous system infection (25%). The overall case fatality rate was 18%, with a higher rate among neonatal patients (73%). In recent years, listeriosis has been reported annually and even peaked in 2014. The median age of nonperinatal cases was 36 years (range, 0-102), with a predominance of male cases (52%). Sporadic cases were frequent from March to May. Efforts to prevent and control the spread of listeriosis are required through further research and collaborative efforts to improve the capacities of clinical diagnosis and treatment.
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Affiliation(s)
- Sisi Chen
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Fanzeng Meng
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Xiaowen Sun
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Hao Yao
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Yuting Wang
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Zhiming Pan
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Yuelan Yin
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
| | - Xin'an Jiao
- Jiangsu 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, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonosis, Yangzhou University, Yangzhou, China
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406
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Duval M, Cossart P. [A new mechanism of antibiotic resistance: ribosome recycling]. Med Sci (Paris) 2019; 35:613-615. [PMID: 31532368 DOI: 10.1051/medsci/2019117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Mélodie Duval
- Département de biologie cellulaire et infection, Unité des interactions bactéries-cellules, Institut Pasteur, 25-28, rue du Docteur Roux, 75015 Paris, France. - Inserm, U604, F-75015 Paris, France. - INRA, unité sous contrat H2020, F-75015 Paris, France
| | - Pascale Cossart
- Département de biologie cellulaire et infection, Unité des interactions bactéries-cellules, Institut Pasteur, 25-28, rue du Docteur Roux, 75015 Paris, France. - Inserm, U604, F-75015 Paris, France. - INRA, unité sous contrat H2020, F-75015 Paris, France
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407
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Haqshenas G, Doerig C. Targeting of host cell receptor tyrosine kinases by intracellular pathogens. Sci Signal 2019; 12:12/599/eaau9894. [PMID: 31530732 DOI: 10.1126/scisignal.aau9894] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Intracellular pathogens use complex and tightly regulated processes to enter host cells. Upon initial interactions with signaling proteins at the surface of target cells, intracellular microbes activate and co-opt specific host signaling pathways that mediate cell surface-cytosol communications to facilitate pathogen internalization. Here, we discuss the roles of host receptor tyrosine kinases (RTKs) in the establishment of productive infections by major intracellular pathogens. We evaluate the gaps in the current understanding of this process and propose a comprehensive approach for assessing the role of host cell signaling in the biology of intracellular microorganisms and viruses. We also discuss RTK-targeting strategies for the treatment of various infections.
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Affiliation(s)
- Gholamreza Haqshenas
- Infection and Immunity, Monash Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia.
| | - Christian Doerig
- Infection and Immunity, Monash Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia. .,Centre for Chronic Infectious and Inflammatory Diseases, School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia
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408
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Mohammadzadeh R, Azadegan A, Kalani BS. Listeriolysin S may inhibit the anti-listerial properties of Lactobacillus plantarum. Microb Pathog 2019; 137:103744. [PMID: 31521800 DOI: 10.1016/j.micpath.2019.103744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 11/16/2022]
Abstract
Listeriosis is a serious infection linked to the consumption of food contaminated with Listeria monocytogenes. Outbreaks and mortality rates associated with this infection make it a significant public health concern. As biocontrol agents, probiotics such as Lactobacillus plantarum had been of interest for the promotion of antilisterial activities. However, a recent bacteriocin from epidemic L. monocytogenes strains called listeriolysin S (LLS) has been identified with the ability to target the prokaryotic cells that may hinder the anti-listerial properties of L. plantarum. The present study was designed to investigate the interplay between serotypes 4b (lineage I, LLS-producing strain) and 1/2a (NCTC7973, lineage II, non LLS-producing strain) L. monocytogenes and L. plantarum ATCC13643. According to the results of the co-culture assay, L. plantarum significantly reduced the growth of LLS- L. monocytogenes. However, there was a significant reduction in the growth of L. plantarum when co-cultured with LLS + L. monocytogenes. Moreover, according to the results of the culture assay using Caco-2 cell line, there was a significant reduced intracellular count of LLS- L. monocytogenes after L. plantarum exposure, whereas, no major differences were observed in the intracellular count of LLS + L. monocytogenes. These results suggest that L. plantarum may be unable to inhibit infections caused by LLS-producing L. monocytogenes. Also, phylogenetic studies showed the presence of LLS-like proteins in several environmental isolates including L. innocua which suggests a role for LLS in survival and bacterial colonization in harsh conditions. In overall, the ability of LLS to target certain bacterial cells should be taken into consideration during the development of anti-listerial probiotics. Future experiments are required to elucidate the exact mechanisms by which LLS achieves bacterial killing.
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Affiliation(s)
- Rokhsareh Mohammadzadeh
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran; Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Azadeh Azadegan
- Department of Microbiology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Behrooz Sadeghi Kalani
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran; Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran.
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409
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Hu W, Chan H, Lu L, Wong KT, Wong SH, Li MX, Xiao ZG, Cho CH, Gin T, Chan MTV, Wu WKK, Zhang L. Autophagy in intracellular bacterial infection. Semin Cell Dev Biol 2019; 101:41-50. [PMID: 31408699 DOI: 10.1016/j.semcdb.2019.07.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 06/06/2019] [Accepted: 07/30/2019] [Indexed: 12/11/2022]
Abstract
Autophagy is a conserved intracellular degradation process enclosing the bulk of cytosolic components for lysosomal degradation to maintain cellular homeostasis. Accumulating evidences showed that a specialized form of autophagy, known as xenophagy, could serve as an innate immune response to defend against pathogens invading inside the host cells. Correspondingly, infectious pathogens have developed a variety of strategies to disarm xenophagy, leading to a prolonged and persistent intracellular colonization. In this review, we first summarize the current knowledge about the general mechanisms of intracellular bacterial infections and xenophagy. We then focus on the ongoing battle between these two processes.
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Affiliation(s)
- Wei Hu
- Department of Gastroenterology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, PR China; Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Hung Chan
- Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Lan Lu
- Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu, Sichuan, PR China
| | - Kam Tak Wong
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, China
| | - Sunny H Wong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China; State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Sciences, and Centre for Gut Microbiota Research, The Chinese University of Hong Kong, Hong Kong, China
| | - Ming X Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, PR China
| | - Zhan G Xiao
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, PR China
| | - Chi H Cho
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, PR China
| | - Tony Gin
- Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Matthew T V Chan
- Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China.
| | - William K K Wu
- Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China; State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Sciences, and Centre for Gut Microbiota Research, The Chinese University of Hong Kong, Hong Kong, China.
| | - Lin Zhang
- Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China; State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Sciences, and Centre for Gut Microbiota Research, The Chinese University of Hong Kong, Hong Kong, China.
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410
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Cross Talk between SigB and PrfA in Listeria monocytogenes Facilitates Transitions between Extra- and Intracellular Environments. Microbiol Mol Biol Rev 2019; 83:83/4/e00034-19. [PMID: 31484692 DOI: 10.1128/mmbr.00034-19] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The foodborne pathogen Listeria monocytogenes can modulate its transcriptome and proteome to ensure its survival during transmission through vastly differing environmental conditions. While L. monocytogenes utilizes a large array of regulators to achieve survival and growth in different intra- and extrahost environments, the alternative sigma factor σB and the transcriptional activator of virulence genes protein PrfA are two key transcriptional regulators essential for responding to environmental stress conditions and for host infection. Importantly, emerging evidence suggests that the shift from extrahost environments to the host gastrointestinal tract and, subsequently, to intracellular environments requires regulatory interplay between σB and PrfA at transcriptional, posttranscriptional, and protein activity levels. Here, we review the current evidence for cross talk and interplay between σB and PrfA and their respective regulons and highlight the plasticity of σB and PrfA cross talk and the role of this cross talk in facilitating successful transition of L. monocytogenes from diverse extrahost to diverse extra- and intracellular host environments.
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411
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Kalani BS, Najafi M, Mohammadzadeh R, Razavi S, Ohadi E, Irajian G. Targeting Listeria monocytogenes consensus sequence of internalin genes using an antisense molecule. Microb Pathog 2019; 136:103689. [PMID: 31445122 DOI: 10.1016/j.micpath.2019.103689] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/17/2019] [Accepted: 08/21/2019] [Indexed: 12/20/2022]
Abstract
As an intracellular pathogen, Listeria monocytogenes can enter host cells where it can replicate and escape detection and eradication by the host immune response making the clearance of infection very challenging. Furthermore, with the advent of antimicrobial resistance, the need for alternative targets is inevitable. Internalin proteins are crucial to this bacterium as they contribute to bacterial entry to the systemic circulation. In this study, we targeted a highly conserved region of these proteins by an antisense sequence that was covalently conjugated to the cell penetrating peptides (CPP) to overcome the challenging delivery barriers. Then, we evaluated the efficiency of this construct in vitro. We also assessed the antigenicity, cytotoxicity, and probability of apoptosis induction by this construct. The studied CPP-PNA inhibited bacterial growth and suppressed the mRNA expression of internalins in a dose-dependent manner. In addition, at all studied concentrations, CPP-PNA significantly reduced the invasion rate of L. monocytogenes in the examined cell lines. Moreover, different concentrations of CPP-PNA did not have a significant antigenic, cytotoxic, and apoptotic properties compared to the control. These results suggest the effectiveness of CPP-antisense in targeting the mRNAs of internalins for various research, therapeutic and preventive purposes. However, additional research is required to evaluate the potency, safety, and pharmacokinetics of this compound for the prevention and treatment of listeriosis.
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Affiliation(s)
- Behrooz Sadeghi Kalani
- Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Najafi
- Department of Biochemistry, Iran University of Medical Sciences, Tehran, Iran
| | - Rokhsareh Mohammadzadeh
- Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Shabnam Razavi
- Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Elnaz Ohadi
- Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Gholamreza Irajian
- Microbial Biotechnology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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412
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Luís Â, Domingues F, Ramos A. Production of Hydrophobic Zein-Based Films Bioinspired by The Lotus Leaf Surface: Characterization and Bioactive Properties. Microorganisms 2019; 7:microorganisms7080267. [PMID: 31426406 PMCID: PMC6723050 DOI: 10.3390/microorganisms7080267] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 08/09/2019] [Accepted: 08/14/2019] [Indexed: 11/16/2022] Open
Abstract
Hydrophobic zein-based functional films incorporating licorice essential oil were successfully developed as new alternative materials for food packaging. The lotus-leaf negative template was obtained using polydimethylsiloxane (PDMS). The complex surface patterns of the lotus leaves were transferred onto the surface of the zein-based films with high fidelity (positive replica), which validates the proposed proof-of-concept. The films were prepared by casting method and fully characterized by Scanning Electron Microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC). The grammage, thickness, contact angle, mechanical, optical and barrier properties of the films were measured, together with the evaluation of their biodegradability, antioxidant and antibacterial activities against common foodborne pathogens (Enterococcus faecalis and Listeria monocytogenes). The zein-based films with the incorporation of licorice essential oil presented the typical rugosities of the lotus leaf making the surfaces very hydrophobic (water contact angle of 112.50°). In addition to having antioxidant and antibacterial properties, the films also shown to be biodegradable, making them a strong alternative to the traditional plastics used in food packaging.
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Affiliation(s)
- Ângelo Luís
- Centro de Investigação em Ciências da Saúde (CICS-UBI), Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
- Laboratório de Fármaco-Toxicologia, UBIMedical, Universidade da Beira Interior, Estrada Municipal 506, 6200-284 Covilhã, Portugal
| | - Fernanda Domingues
- Centro de Investigação em Ciências da Saúde (CICS-UBI), Universidade da Beira Interior, Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal
- Departamento de Química, Faculdade de Ciências, Universidade da Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal
| | - Ana Ramos
- Departamento de Química, Faculdade de Ciências, Universidade da Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal.
- Materiais Fibrosos e Tecnologias Ambientais (FibEnTech), Universidade da Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal.
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413
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Keto-Timonen R, Markkula A, Halkilahti J, Huttunen R, Räsänen S, Salmenlinna S, Heikkilä A, Puisto M, Närhinen M, Hakkinen M, Korkeala H, Jalava K. Shopping Detail Information and Home Freezer Sampling Confirmed the Role of Commercial, Modified-Atmosphere Packaged Meatballs as a Vehicle for Listeriosis in Finland. Front Public Health 2019; 7:216. [PMID: 31448252 PMCID: PMC6691019 DOI: 10.3389/fpubh.2019.00216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 07/19/2019] [Indexed: 01/18/2023] Open
Abstract
In November 2016, an elderly patient was diagnosed with Listeria monocytogenes bacteremia in Finland. Grocery store loyalty card records and microbiological investigation of foods found in the home fridge and freezer of the patient revealed commercial, modified-atmosphere packaged meatballs as the source of the infection. Investigation of the meatball production plant revealed that the floor drain samples were contaminated with the same L. monocytogenes strain as those isolated from the patient and meatballs. Ready-to-eat meatballs were likely contaminated after heat treatment from the production environment before packaging. Long-term cold storage, modified-atmosphere conditions, and the absence of competing bacteria presumably enhanced the growth of L. monocytogenes. We recommend that collection of shopping details and home fridge and freezer sampling should be part of surveillance of all cases of L. monocytogenes infections to complement information obtained from in-depth interviews.
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Affiliation(s)
- Riikka Keto-Timonen
- Department of Food Hygiene and Environmental Health, University of Helsinki, Helsinki, Finland
| | - Annukka Markkula
- Microbiological Food Safety Unit, Finnish Food Authority, Helsinki, Finland
| | - Jani Halkilahti
- Health Security Department, National Institute for Health and Welfare, Helsinki, Finland
| | - Reetta Huttunen
- Department of Internal Medicine, Tampere University Hospital, Tampere, Finland
| | | | - Saara Salmenlinna
- Health Security Department, National Institute for Health and Welfare, Helsinki, Finland
| | - Anne Heikkilä
- Department of Food Hygiene and Environmental Health, University of Helsinki, Helsinki, Finland
| | - Mia Puisto
- Environmental Health Office of Etelä-Satakunta, Säkylä, Finland
| | | | - Marjaana Hakkinen
- Microbiology Research Unit, Finnish Food Authority, Helsinki, Finland
| | - Hannu Korkeala
- Department of Food Hygiene and Environmental Health, University of Helsinki, Helsinki, Finland
| | - Katri Jalava
- Department of Food Hygiene and Environmental Health, University of Helsinki, Helsinki, Finland
- Department of Mathematics and Statistics, University of Helsinki, Helsinki, Finland
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414
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Tiensuu T, Guerreiro DN, Oliveira AH, O’Byrne C, Johansson J. Flick of a switch: regulatory mechanisms allowing Listeria monocytogenes to transition from a saprophyte to a killer. Microbiology (Reading) 2019; 165:819-833. [DOI: 10.1099/mic.0.000808] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Teresa Tiensuu
- Department of Molecular Biology; Molecular Infection Medicine, Sweden (MIMS); Umeå Centre for Microbial Research, Umeå University, Umeå, Sweden
| | - Duarte N. Guerreiro
- Bacterial Stress Response Group, Microbiology, School of Natural Sciences, National University of Ireland Galway, Galway H91 TK33, Ireland
| | - Ana H. Oliveira
- Department of Molecular Biology; Molecular Infection Medicine, Sweden (MIMS); Umeå Centre for Microbial Research, Umeå University, Umeå, Sweden
| | - Conor O’Byrne
- Bacterial Stress Response Group, Microbiology, School of Natural Sciences, National University of Ireland Galway, Galway H91 TK33, Ireland
| | - Jörgen Johansson
- Department of Molecular Biology; Molecular Infection Medicine, Sweden (MIMS); Umeå Centre for Microbial Research, Umeå University, Umeå, Sweden
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415
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Mezger M, Nording H, Sauter R, Graf T, Heim C, von Bubnoff N, Ensminger SM, Langer HF. Platelets and Immune Responses During Thromboinflammation. Front Immunol 2019; 10:1731. [PMID: 31402914 PMCID: PMC6676797 DOI: 10.3389/fimmu.2019.01731] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 07/09/2019] [Indexed: 12/17/2022] Open
Abstract
Besides mediating hemostatic functions, platelets are increasingly recognized as important players of inflammation. Data from experiments in mice and men revealed various intersection points between thrombosis, hemostasis, and inflammation, which are addressed and discussed in this review in detail. One such example is the intrinsic coagulation cascade that is initiated after platelet activation thereby further propagating and re-enforcing wound healing or thrombus formation but also contributing to the pathophysiology of severe diseases. FXII of the intrinsic pathway connects platelet activation with the coagulation cascade during immune reactions. It can activate the contact system thereby either creating an inflammatory state or accelerating inflammation. Recent insights into platelet biology could show that platelets are equipped with complement receptors. Platelets are important for tissue remodeling after injury has been inflicted to the endothelial barrier and to the subendothelial tissue. Thus, platelets are increasingly recognized as more than just cells relevant for bleeding arrest. Future insights into platelet biology are to be expected. This research will potentially offer novel opportunities for therapeutic intervention in diseases featuring platelet abundance.
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Affiliation(s)
- Matthias Mezger
- University Hospital, Medical Clinic II, University Heart Center Lübeck, Lübeck, Germany
| | - Henry Nording
- University Hospital, Medical Clinic II, University Heart Center Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany
| | - Reinhard Sauter
- University Hospital, Medical Clinic II, University Heart Center Lübeck, Lübeck, Germany
| | - Tobias Graf
- University Hospital, Medical Clinic II, University Heart Center Lübeck, Lübeck, Germany
| | - Christian Heim
- Department of Cardiac Surgery, University Hospital Erlangen, Erlangen, Germany
| | - Nikolas von Bubnoff
- Department of Hematology and Oncology, Medical Center, University of Schleswig-Holstein, Lübeck, Germany
| | - Stephan M Ensminger
- Department of Cardiac and Thoracic Vascular Surgery, University Heart Center Lübeck, Lübeck, Germany
| | - Harald F Langer
- University Hospital, Medical Clinic II, University Heart Center Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany
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416
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Sanderlin AG, Vondrak C, Scricco AJ, Fedrigo I, Ahyong V, Lamason RL. RNAi screen reveals a role for PACSIN2 and caveolins during bacterial cell-to-cell spread. Mol Biol Cell 2019; 30:2124-2133. [PMID: 31242077 PMCID: PMC6743452 DOI: 10.1091/mbc.e19-04-0197] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Listeria monocytogenes is a human bacterial pathogen that disseminates through host tissues using a process called cell-to-cell spread. This critical yet understudied virulence strategy resembles a vesicular form of intercellular trafficking that allows L. monocytogenes to move between host cells without escaping the cell. Interestingly, eukaryotic cells can also directly exchange cellular components via intercellular communication pathways (e.g., trans-endocytosis) using cell–cell adhesion, membrane trafficking, and membrane remodeling proteins. Therefore, we hypothesized that L. monocytogenes would hijack these types of host proteins during spread. Using a focused RNA interference screen, we identified 22 host genes that are important for L. monocytogenes spread. We then found that caveolins (CAV1 and CAV2) and the membrane sculpting F-BAR protein PACSIN2 promote L. monocytogenes protrusion engulfment during spread, and that PACSIN2 specifically localizes to protrusions. Overall, our study demonstrates that host intercellular communication pathways may be coopted during bacterial spread and that specific trafficking and membrane remodeling proteins promote bacterial protrusion resolution.
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Affiliation(s)
- Allen G Sanderlin
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Cassandra Vondrak
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Arianna J Scricco
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Indro Fedrigo
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720
| | - Vida Ahyong
- Chan Zuckerberg Biohub, San Francisco, CA 94158
| | - Rebecca L Lamason
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
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417
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Correlated protein conformational states and membrane dynamics during attack by pore-forming toxins. Proc Natl Acad Sci U S A 2019; 116:12839-12844. [PMID: 31189600 DOI: 10.1073/pnas.1821897116] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Pore-forming toxins (PFTs) are a class of proteins implicated in a wide range of virulent bacterial infections and diseases. These toxins bind to target membranes and subsequently oligomerize to form functional pores that eventually lead to cell lysis. While the protein undergoes large conformational changes on the bilayer, the connection between intermediate oligomeric states and lipid reorganization during pore formation is largely unexplored. Cholesterol-dependent cytolysins (CDCs) are a subclass of PFTs widely implicated in food poisoning and other related infections. Using a prototypical CDC, listeriolysin O (LLO), we provide a microscopic connection between pore formation, lipid dynamics, and leakage kinetics by using a combination of Förster resonance energy transfer (FRET) and fluorescence correlation spectroscopy (FCS) measurements on single giant unilamellar vesicles (GUVs). Upon exposure to LLO, two distinct populations of GUVs with widely different leakage kinetics emerge. We attribute these differences to the existence of oligomeric intermediates, sampling various membrane-bound conformational states of the protein, and their intimate coupling to lipid rearrangement and dynamics. Molecular dynamics simulations capture the influence of various membrane-bound conformational states on the lipid and cholesterol dynamics, providing molecular interpretations to the FRET and FCS experiments. Our study establishes a microscopic connection between membrane binding and conformational changes and their influence on lipid reorganization during PFT-mediated cell lysis. Additionally, our study provides insights into membrane-mediated protein interactions widely implicated in cell signaling, fusion, folding, and other biomolecular processes.
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418
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Chen M, Chen Y, Wu Q, Zhang J, Cheng J, Li F, Zeng H, Lei T, Pang R, Ye Q, Bai J, Wang J, Wei X, Zhang Y, Ding Y. Genetic characteristics and virulence of Listeria monocytogenes isolated from fresh vegetables in China. BMC Microbiol 2019; 19:119. [PMID: 31159734 PMCID: PMC6547522 DOI: 10.1186/s12866-019-1488-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 05/10/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Ready-to-eat (RTE) vegetables have become increasingly popular along with the trend of moving towards a healthy lifestyle. However, RTE vegetables are at a higher risk of containing pathogens, maybe owing to lack of rigorous sanitization procedures. To understand the prevalence and potential risk of Listeria monocytogenes in RTE vegetables, we investigated the contamination level and characteristics of L. monocytogenes isolated from fresh vegetables. RESULTS Twenty-three (5.49%) of the 419 vegetables samples were positive for L. monocytogenes. Phylogenetic group I.1 (1/2a-3a) and II.2 (1/2b-3b-7) strains were predominant in 30 isolates, which accounted for 33.3 and 50.0%, respectively. Multilocus sequence typing of the 30 isolates grouped them into nine sequence types (STs). The most common STs were ST87 (36.7%) and ST8 (26.7%). Virulence analysis showed that all 30 isolates harbored eight classical virulence genes, 10.0% isolates harbored the llsX gene (ST3 and ST1 strains), and 36.7% carried the ptsA gene and belonged to ST87. Approximately 83.3% isolates carried full-length inlA, whereas five isolates had premature stop codons in inlA, three of which belonged to ST9 and two to ST8. Antibiotic susceptibility showed the isolates were varyingly resistant to 13 antibiotics, 26.7% of the isolates were multi-drug resistant. CONCLUSIONS The fresh vegetables contain some potential hypervirulent L. monocytogenes (ST1 and ST87) in the Chinese markets. In addition, the high rate of L. monocytogenes isolates was multi-drug resistant. Fresh raw vegetables may be a possible transmission route for L. monocytogenes infection in consumers. Therefore, sanitization of raw fresh vegetables should be strengthened to ensure their microbiological safety when used as RTE vegetables.
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Affiliation(s)
- Moutong Chen
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Yuetao Chen
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China.,College of Food Science, South China Agricultural University, Guangzhou, China
| | - Qingping Wu
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China.
| | - Jumei Zhang
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Jianheng Cheng
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Fan Li
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Haiyan Zeng
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Tao Lei
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Rui Pang
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Qinghua Ye
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Jianling Bai
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Juan Wang
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Xianhu Wei
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Youxiong Zhang
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, 58# Building, 100# Yard, XianlieZhong Road, Yuexiu District, Guangzhou, 510070, Guangdong Province, People's Republic of China
| | - Yu Ding
- Department of Food Science and Technology, Jinan University, Guangzhou, China
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419
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420
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Day JB, Hammack TS. Bio-Plex suspension array immuno-detection of Listeria monocytogenes from cantaloupe and packaged salad using virulence protein inducing activated charcoal enrichment media. Food Microbiol 2019; 84:103225. [PMID: 31421770 DOI: 10.1016/j.fm.2019.05.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/01/2019] [Accepted: 05/20/2019] [Indexed: 12/27/2022]
Abstract
Listeria monocytogenes, the causative agent of listeriosis in humans, is a Gram-positive bacterium that is contracted via the ingestion of contaminated foods. Two of the largest outbreaks of listeriosis occurred following consumption of tainted cantaloupe and packaged salads. Molecular methods and immuno-based techniques for detection of L. monocytogenes in these food matrices can be difficult due to the presence of assay inhibiting elements. In this study, we utilized a novel enrichment media containing activated charcoal as the key ingredient that induces hyperactive expression and secretion of L. monocytogenes virulence proteins. The Bio-Plex suspension array system, based on Luminex xMAP technology, was subsequently employed to specifically detect accumulated L. monocytogenes secreted and membrane bound proteins via paramagnetic microsphere-antibody complexes. Cantaloupe and packaged salad samples were treated with a dilution series of L. monocytogenes and incubated in activated charcoal media following a short pre-enrichment step in Buffered Listeria Enrichment Broth. Secreted L. monocytogenes lysteriolysin O was captured using magnetic microsphere-antibody conjugates and measured using the Bio-Ple×200 analyzer. As few as 100 CFU/g of L. monocytogenes was detected from both spiked cantaloupe and packaged salad samples. In addition, antibody conjugated microspheres targeting a membrane protein present on both pathogenic and nonpathogenic Listeria species was used to identify as few as 100 CFU/g of both pathogenic and nonpathogenic species in cantaloupe and packaged salad. This method presumptively identifies L. monocytogenes from cantaloupe and packaged salad in less than 24 h and non-pathogenic Listeria species within 22 h.
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Affiliation(s)
- J B Day
- U.S. Food and Drug Administration Center for Food Safety and Applied Nutrition 5001 Campus Dr., College Park, MD, 20740, USA.
| | - T S Hammack
- U.S. Food and Drug Administration Center for Food Safety and Applied Nutrition 5001 Campus Dr., College Park, MD, 20740, USA
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421
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Pizarro-Cerdá J, Cossart P. Microbe Profile: Listeria monocytogenes: a paradigm among intracellular bacterial pathogens. MICROBIOLOGY-SGM 2019; 165:719-721. [PMID: 31124782 DOI: 10.1099/mic.0.000800] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Listeria monocytogenes is a food-borne bacterial pathogen that is responsible for listeriosis, a disease characterized by occasional febrile gastroenteritis in immunocompetent individuals, abortions in pregnant women, meningitis in the newborn and fatal bacteraemia in immunocompromised individuals or the elderly. The ability of L. monocytogenes to produce disease is intimately associated with its potential to traverse several human barriers (including the intestinal, placental and blood/brain barriers), to promote its internalization within diverse populations of epithelial cells and to proliferate in the intra-ic environment while escaping host immune responses. L. monocytogenes is often regarded as a paradigm for intracellular parasitism.
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Affiliation(s)
- Javier Pizarro-Cerdá
- Yersinia Research Unit, Department of Microbiology, Institut Pasteur - 75015 Paris, France
| | - Pascale Cossart
- Bacteria-Cell Interactions Unit, Department of Cell Biology and Infection, Institut Pasteur - 75015 Paris, France
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422
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Muchaamba F, Eshwar AK, Stevens MJA, von Ah U, Tasara T. Variable Carbon Source Utilization, Stress Resistance, and Virulence Profiles Among Listeria monocytogenes Strains Responsible for Listeriosis Outbreaks in Switzerland. Front Microbiol 2019; 10:957. [PMID: 31130938 PMCID: PMC6510287 DOI: 10.3389/fmicb.2019.00957] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 04/16/2019] [Indexed: 12/21/2022] Open
Abstract
A combination of phenotype microarrays, targeted stress resistance and virulence assays and comparative genome analysis was used to compare a set of Listeria monocytogenes strains including those involved in previous Swiss foodborne listeriosis outbreaks. Despite being highly syntenic in gene content these strains showed significant phenotypic variation in utilization of different carbon (C)-sources as well as in resistance of osmotic and pH stress conditions that are relevant to host and food associated environments. An outbreak strain from the 2005 Swiss Tomme cheese listeriosis outbreak (Lm3163) showed the highest versatility in C-sources utilized whereas the strain responsible for the 1983 to 1987 Vacherin Montd'or cheese listeriosis outbreak (LL195) showed the highest tolerance to both osmotic and pH stress conditions among the examined strains. Inclusion of L-norvaline led to enhanced resistance of acidic stress in all the examined strains and there were strain-strain-specific differences observed in the ability of other amino acids and urea to enhance acid stress resistance in L. monocytogenes. A strain dependent inhibition pattern was also observed upon inclusion of β-phenylethylamine under alkaline stress conditions. In targeted phenotypic analysis the strain-specific differences in salt stress tolerance uncovered in phenotypic microarrays were corroborated and variations in host cell invasion and virulence among the examined strains were also revealed. Outbreak associated strains representing lineage I serotype 4b showed superior pathogenicity in a zebrafish infection model whilst Lm3163 a lineage II serotype 1/2a outbreak strain demonstrated the highest cellular invasion capacity amongst the tested strains. A genome wide sequence comparison of the strains only revealed few genetic differences between the strains suggesting that variations in gene regulation and expression are largely responsible for the phenotypic differences revealed among the examined strains. Our results have generated data that provides a potential basis for the future design of improved Listeria specific media to enhance routine detection and isolation of this pathogen as well as provide knowledge for developing novel methods for its control in food.
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Affiliation(s)
- Francis Muchaamba
- Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Zurich, Switzerland
| | - Athmanya K. Eshwar
- Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Zurich, Switzerland
| | - Marc J. A. Stevens
- Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Zurich, Switzerland
| | | | - Taurai Tasara
- Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zürich, Zurich, Switzerland
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423
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Zhu S, Zeng M, Guo W, Feng G, Wu H. Catalase-mimetic gold nanoparticles inhibit the antagonistic action of Lactobacillus gasseri toward foodborne enteric pathogens in associative cultures. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2019; 37:55-66. [PMID: 31017521 DOI: 10.1080/10590501.2019.1591698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Gold nanoparticles (AuNPs) have been previously shown to induce gut dysbiosis during colitis in mice, but the underlying mechanism is not clear yet. Here, we evaluated the effects of AuNPs (5 nm diameter, coated with tannic acid, polyvinylpyrrolidone or citrate) on H2O2 accumulation and pathogen antagonization by an intestinal strain of Lactobacillus gasseri under aerobic cultural conditions. AuNPs (0.65 μg/mL) reduced over 50% of H2O2 accumulation by L. gasseri, and significantly inhibited the antagonistic action of L. gasseri on growth of four foodborne enteric pathogens, i.e. Salmonella enterica serovar Typhimurium, Escherichia coli, Listeria monocytogenes, and Staphylococcus aureus in associative cultures.
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Affiliation(s)
- Suqin Zhu
- a College of Food Science and Engineering , Ocean University of China , Qingdao , China
| | - Mingyong Zeng
- a College of Food Science and Engineering , Ocean University of China , Qingdao , China
| | - Wei Guo
- a College of Food Science and Engineering , Ocean University of China , Qingdao , China
| | - Guangxin Feng
- a College of Food Science and Engineering , Ocean University of China , Qingdao , China
| | - Haohao Wu
- a College of Food Science and Engineering , Ocean University of China , Qingdao , China
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424
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Rahmeh R, Akbar A, Kishk M, Al-Onaizi T, Al-Azmi A, Al-Shatti A, Shajan A, Al-Mutairi S, Akbar B. Distribution and antimicrobial activity of lactic acid bacteria from raw camel milk. New Microbes New Infect 2019; 30:100560. [PMID: 31193267 PMCID: PMC6522851 DOI: 10.1016/j.nmni.2019.100560] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/08/2019] [Accepted: 04/11/2019] [Indexed: 12/13/2022] Open
Abstract
Consumer demand for natural pathogen-control agents for substitution of synthetic food preservatives and traditional antibiotics is increasing. This study aimed to reveal the distribution of lactic acid bacteria (LAB) in raw camel milk and to characterize their antimicrobial traits. The genetic identification by 16S rRNA sequencing of 58 LAB isolates showed the predominance of Enterococcus (24.2%), Lactococcus (22.4%) and Pediococcus (20.7%) genera in raw camel milk. These genera exhibited inhibitory activity against a broad spectrum of Gram-positive and Gram-negative bacteria including multidrug-resistant Salmonella. Among these LAB, two isolates-identified as Pediococcus pentosaceus CM16 and Lactobacillus brevis CM22-were selected for their strong bacteriocinogenic anti-listerial activity estimated at 1600 and 800 AU/mL, respectively. The bacteriocins produced were partially purified by ammonium sulphate precipitation and gel filtration and then biochemically characterized. The proteinaceous nature of bacteriocins was confirmed by the susceptibility to enzymes. These bacteriocins showed significant technological characteristics such as heat-resistance, and stability over a wide range of pH (2.0-10.0). In conclusion, these results indicated that Pediococcus pentosaceus CM16 and Lactobacillus brevis CM22 could be useful as potential probiotics. Moreover, their partially purified bacteriocins may play an important role as food preservatives and feed additives. To our knowledge, this is the first report describing the distribution of LAB population in raw camel milk and the characterization of their bacteriocins from the Arabian Peninsula of western Asia.
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Affiliation(s)
- R Rahmeh
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - A Akbar
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - M Kishk
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - T Al-Onaizi
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - A Al-Azmi
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - A Al-Shatti
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - A Shajan
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - S Al-Mutairi
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
| | - B Akbar
- Biotechnology Programme, Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat, Kuwait
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425
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Mathipa MG, Thantsha MS, Bhunia AK. Lactobacillus casei expressing Internalins A and B reduces Listeria monocytogenes interaction with Caco-2 cells in vitro. Microb Biotechnol 2019; 12:715-729. [PMID: 30989823 PMCID: PMC6559204 DOI: 10.1111/1751-7915.13407] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 03/20/2019] [Accepted: 03/22/2019] [Indexed: 12/28/2022] Open
Abstract
Listeria monocytogenes has been implicated in a number of outbreaks including the recent largest outbreak in South Africa. Current methods for prevention of foodborne L. monocytogenes infection are inadequate, thus raising a need for an alternative strategy. Probiotic bioengineering is considered a prevailing approach to enhance the efficacy of probiotics for targeted control of pathogens. Here, the ability of Lactobacillus casei expressing the L. monocytogenes invasion proteins Internalins A and B (inlAB) to prevent infection was investigated. The inlAB operon was cloned and surface‐expressed on L. casei resulting in a recombinant strain, LbcInlAB, and subsequently, its ability to inhibit adhesion, invasion and translocation of L. monocytogenes through enterocyte‐like Caco‐2 cells was examined. Cell surface expression of InlAB on the LbcInlAB was confirmed by Western blotting and immunofluorescence staining. The LbcInlAB strain showed significantly higher (P < 0.0001) adherence, invasion and translocation of Caco‐2 cells than the wild‐type L. casei strain (LbcWT), as well as reduced L. monocytogenes adhesion, invasion and transcellular passage through the cell monolayer than LbcWT. Furthermore, pre‐exposure of Caco‐2 cells to LbcInlAB significantly reduced L. monocytogenes‐induced cell cytotoxicity and epithelial barrier dysfunction. These results suggest that InlAB‐expressing L. casei could be a potential practical approach for prevention of listeriosis.
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Affiliation(s)
- Moloko G Mathipa
- Department of Biochemistry, Genetics, and Microbiology, University of Pretoria, Pretoria, South Africa.,Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, USA
| | - Mapitsi S Thantsha
- Department of Biochemistry, Genetics, and Microbiology, University of Pretoria, Pretoria, South Africa
| | - Arun K Bhunia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, USA.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, USA.,Purdue Institute of Inflammation, Immunology, and Infectious Disease, Purdue University, West Lafayette, IN, USA
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426
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Hofer U. Listeria pioneers. Nat Rev Microbiol 2019; 17:196-197. [DOI: 10.1038/s41579-019-0161-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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427
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Tan L, Yuan X, Liu Y, Cai X, Guo S, Wang A. Non-muscle Myosin II: Role in Microbial Infection and Its Potential as a Therapeutic Target. Front Microbiol 2019; 10:401. [PMID: 30886609 PMCID: PMC6409350 DOI: 10.3389/fmicb.2019.00401] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 02/15/2019] [Indexed: 01/11/2023] Open
Abstract
Currently, the major measures of preventing and controlling microbial infection are vaccinations and drugs. However, the appearance of drug resistance microbial mounts is main obstacle in current anti-microbial therapy. One of the most ubiquitous actin-binding proteins, non-muscle myosin II (NM II) plays a crucial role in a wide range of cellular physiological activities in mammals, including cell adhesion, migration, and division. Nowadays, growing evidence indicates that aberrant expression or activity of NM II can be detected in many diseases caused by microbes, including viruses and bacteria. Furthermore, an important role for NM II in the infection of some microbes is verified. Importantly, modulating the expression of NM II with small hairpin RNA (shRNA) or the activity of it by inhibitors can affect microbial-triggered phenotypes. Therefore, NM II holds the promise to be a potential target for inhibiting the infection of microbes and even treating microbial-triggered discords. In spite of these, a comprehensive view on the functions of NM II in microbial infection and the regulators which have an impact on the roles of NM II in this context, is still lacking. In this review, we summarize our current knowledge on the roles of NM II in microbial-triggered discords and provide broad insights into its regulators. In addition, the existing challenge of investigating the multiple roles of NM II in microbial infection and developing NM II inhibitors for treating these microbial-triggered discords, are also discussed.
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Affiliation(s)
- Lei Tan
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, Research and Development Center for Animal Reverse Vaccinology of Hunan Province, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Xiaomin Yuan
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, Research and Development Center for Animal Reverse Vaccinology of Hunan Province, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Yisong Liu
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, Research and Development Center for Animal Reverse Vaccinology of Hunan Province, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Xiong Cai
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Shiyin Guo
- College of Food Science and Technology, Hunan Agricultural University, Changsha, China
| | - Aibing Wang
- Hunan Provincial Key Laboratory of Protein Engineering in Animal Vaccines, Research and Development Center for Animal Reverse Vaccinology of Hunan Province, College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
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428
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Abstract
The Gram-positive pathogen Listeria monocytogenes is able to promote its entry into a diverse range of mammalian host cells by triggering plasma membrane remodeling, leading to bacterial engulfment. Upon cell invasion, L. monocytogenes disrupts its internalization vacuole and translocates to the cytoplasm, where bacterial replication takes place. Subsequently, L. monocytogenes uses an actin-based motility system that allows bacterial cytoplasmic movement and cell-to-cell spread. L. monocytogenes therefore subverts host cell receptors, organelles and the cytoskeleton at different infection steps, manipulating diverse cellular functions that include ion transport, membrane trafficking, post-translational modifications, phosphoinositide production, innate immune responses as well as gene expression and DNA stability.
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429
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Costa AC, Carvalho F, Cabanes D, Sousa S. Stathmin recruits tubulin to Listeria monocytogenes-induced actin comets and promotes bacterial dissemination. Cell Mol Life Sci 2019; 76:961-975. [PMID: 30506415 PMCID: PMC11105747 DOI: 10.1007/s00018-018-2977-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/24/2018] [Accepted: 11/22/2018] [Indexed: 01/18/2023]
Abstract
The tubulin cytoskeleton is one of the main components of the cytoarchitecture and is involved in several cellular functions. Here, we examine the interplay between Listeria monocytogenes (Lm) and the tubulin cytoskeleton upon cellular infection. We show that non-polymeric tubulin is present throughout Lm actin comet tails and, to a less extent, in actin clouds. Moreover, we demonstrate that stathmin, a regulator of microtubule dynamics, is also found in these Lm-associated actin structures and is required for tubulin recruitment. Depletion of host stathmin results in longer comets containing less F-actin, which may be correlated with higher levels of inactive cofilin in the comet, thus suggesting a defect on local F-actin dynamics. In addition, intracellular bacterial speed is significantly reduced in stathmin-depleted cells, revealing the importance of stathmin/tubulin in intracellular Lm motility. In agreement, the area of infection foci and the total bacterial loads are also significantly reduced in stathmin-depleted cells. Collectively, our results demonstrate that stathmin promotes efficient cellular infection, possibly through tubulin recruitment and control of actin dynamics at Lm-polymerized actin structures.
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Affiliation(s)
- Ana Catarina Costa
- Group of Molecular Microbiology, i3S-Instituto de Investigação e Inovação em Saúde, IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal
| | - Filipe Carvalho
- Group of Molecular Microbiology, i3S-Instituto de Investigação e Inovação em Saúde, IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal
- Unité des Interactions Bactéries-Cellules, Institut Pasteur, 25 Rue du Dr Roux, 75015, Paris, France
| | - Didier Cabanes
- Group of Molecular Microbiology, i3S-Instituto de Investigação e Inovação em Saúde, IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal
| | - Sandra Sousa
- Group of Molecular Microbiology, i3S-Instituto de Investigação e Inovação em Saúde, IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.
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430
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De Abrew Abeysundara P, Dhowlaghar N, Nannapaneni R. Influence of cold stress on the survival of Listeria monocytogenes Bug600 and ScottA in lethal alkali, acid and oxidative stress. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2018.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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431
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Las Heras V, Clooney AG, Ryan FJ, Cabrera-Rubio R, Casey PG, Hueston CM, Pinheiro J, Rudkin JK, Melgar S, Cotter PD, Hill C, Gahan CGM. Short-term consumption of a high-fat diet increases host susceptibility to Listeria monocytogenes infection. MICROBIOME 2019; 7:7. [PMID: 30658700 PMCID: PMC6339339 DOI: 10.1186/s40168-019-0621-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 01/04/2019] [Indexed: 05/02/2023]
Abstract
BACKGROUND A westernized diet comprising a high caloric intake from animal fats is known to influence the development of pathological inflammatory conditions. However, there has been relatively little focus upon the implications of such diets for the progression of infectious disease. Here, we investigated the influence of a high-fat (HF) diet upon parameters that influence Listeria monocytogenes infection in mice. RESULTS We determined that short-term administration of a HF diet increases the number of goblet cells, a known binding site for the pathogen, in the gut and also induces profound changes to the microbiota and promotes a pro-inflammatory gene expression profile in the host. Host physiological changes were concordant with significantly increased susceptibility to oral L. monocytogenes infection in mice fed a HF diet relative to low fat (LF)- or chow-fed animals. Prior to Listeria infection, short-term consumption of HF diet elevated levels of Firmicutes including Coprococcus, Butyricicoccus, Turicibacter and Clostridium XIVa species. During active infection with L. monocytogenes, microbiota changes were further exaggerated but host inflammatory responses were significantly downregulated relative to Listeria-infected LF- or chow-fed groups, suggestive of a profound tempering of the host response influenced by infection in the context of a HF diet. The effects of diet were seen beyond the gut, as a HF diet also increased the sensitivity of mice to systemic infection and altered gene expression profiles in the liver. CONCLUSIONS We adopted a systems approach to identify the effects of HF diet upon L. monocytogenes infection through analysis of host responses and microbiota changes (both pre- and post-infection). Overall, the results indicate that short-term consumption of a westernized diet has the capacity to significantly alter host susceptibility to L. monocytogenes infection concomitant with changes to the host physiological landscape. The findings suggest that diet should be a consideration when developing models that reflect human infectious disease.
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Affiliation(s)
- Vanessa Las Heras
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
| | - Adam G Clooney
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Feargal J Ryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | - Pat G Casey
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Cara M Hueston
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Jorge Pinheiro
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
| | - Justine K Rudkin
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
| | - Silvia Melgar
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Paul D Cotter
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
| | - Colin Hill
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
| | - Cormac G M Gahan
- APC Microbiome Ireland, University College Cork, Cork, Ireland.
- School of Microbiology, University College Cork, Cork, Ireland.
- School of Pharmacy, University College Cork, Cork, Ireland.
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432
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Drolia R, Bhunia AK. Crossing the Intestinal Barrier via Listeria Adhesion Protein and Internalin A. Trends Microbiol 2019; 27:408-425. [PMID: 30661918 DOI: 10.1016/j.tim.2018.12.007] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/11/2018] [Accepted: 12/14/2018] [Indexed: 12/24/2022]
Abstract
The intestinal epithelial cell lining provides the first line of defense, yet foodborne pathogens such as Listeria monocytogenes can overcome this barrier; however, the underlying mechanism is not well understood. Though the host M cells in Peyer's patch and the bacterial invasion protein internalin A (InlA) are involved, L. monocytogenes can cross the gut barrier in their absence. The interaction of Listeria adhesion protein (LAP) with the host cell receptor (heat shock protein 60) disrupts the epithelial barrier, promoting bacterial translocation. InlA aids L. monocytogenes transcytosis via interaction with the E-cadherin receptor, which is facilitated by epithelial cell extrusion and goblet cell exocytosis; however, LAP-induced cell junction opening may be an alternative bacterial strategy for InlA access to E-cadherin and its translocation. Here, we summarize the strategies that L. monocytogenes employs to circumvent the intestinal epithelial barrier and compare and contrast these strategies with other enteric bacterial pathogens. Additionally, we provide implications of recent findings for food safety regulations.
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Affiliation(s)
- Rishi Drolia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN 47907, USA
| | - Arun K Bhunia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN 47907, USA; Department of Comparative Pathobiology, Purdue University, West Lafayette, IN 47907, USA; Purdue Institute of Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, IN 47907, USA.
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433
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Fan Z, Xie J, Li Y, Wang H. Listeriosis in mainland China: A systematic review. Int J Infect Dis 2019; 81:17-24. [PMID: 30641204 DOI: 10.1016/j.ijid.2019.01.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 12/26/2018] [Accepted: 01/05/2019] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE The aim of this study was to conduct a systematic review to better understand the epidemiological and clinical characteristics of listeriosis patients in mainland China. METHODS The six most widely used Chinese and English language databases were searched. The records of patients with listeriosis in mainland China reported during the years 2011-2017 were extracted. The clinical data of patients and information on clinical isolates of Listeria were collected and analyzed. RESULTS In total, 136 records were identified, reporting 562 patients with listeriosis. The number of patients was much higher than that reported in the previous decade. The 227 non-perinatal listeriosis patients included had a mortality rate of 23.78%. Of the 231 perinatal listeriosis patients, 32.68% resulted in abortion and/or newborn death. All listeriosis cases were reported as being sporadic. The listeriosis was traced to infection via a meat product in only three patients, while 33.12% were healthcare-associated infections. CONCLUSIONS The number of patients with listeriosis in mainland China may have been underestimated previously. Perinatal cases in mainland China account for a much higher proportion than is usually described. Considering the high number of listeriosis patients in China, a comprehensive monitoring system for Listeria is urgently needed.
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Affiliation(s)
- Zhangling Fan
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jing Xie
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yue Li
- The Institute of Medical Information (IMI) and Library, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Huanling Wang
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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434
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Systemic Listeria monocytogenes Infection as a Model to Study T Helper Cell Immune Responses. Methods Mol Biol 2019; 1960:149-160. [PMID: 30798529 DOI: 10.1007/978-1-4939-9167-9_13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Listeria monocytogenes, a Gram-positive facultative intracellular pathogen, has been widely used as a model for studying the immune response. Here, we describe a protocol for the systemic infection of mice with L. monocytogenes, followed by isolation of lymphocytes from spleens and lymph nodes. We also include details on how to culture and store L. monocytogenes, as well as the specifics for fluorescence-activated cell sorting (FACS) for CD4+ cells in response to the systemic infection. This protocol can be adapted by changing the dosage of L. monocytogenes for a more or less aggressive infection and/or sorting for other immune cell subtypes of interest.
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435
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Role and regulation of the stress activated sigma factor sigma B (σ B) in the saprophytic and host-associated life stages of Listeria monocytogenes. ADVANCES IN APPLIED MICROBIOLOGY 2019; 106:1-48. [PMID: 30798801 DOI: 10.1016/bs.aambs.2018.11.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The stress activated sigma factor sigma B (σB) plays a pivotal role in allowing the food-borne bacterial pathogen Listeria monocytogenes to modulate its transcriptional landscape in order to survive in a variety of harsh environments both outside and within the host. While we have a comparatively good understanding of the systems under the control of this sigma factor much less is known about how the activity of σB is controlled. In this review, we present a current model describing how this sigma factor is thought to be controlled including an overview of what is known about stress sensing and the early signal transduction events that trigger its activation. We discuss the known regulatory overlaps between σB and other protein and RNA regulators in the cell. Finally, we describe the role of σB in surviving both saprophytic and host-associated stresses. The complexity of the regulation of this sigma factor reflects the significant role that it plays in the persistence of this important pathogen in the natural environment, the food chain as well as within the host during the early stages of an infection. Understanding its regulation will be a critical step in helping to develop rational strategies to prevent its growth and survival in the food destined for human consumption and in the prevention of listeriosis.
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436
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Chua MD, Walker BD, Jin JP, Guttman JA. Calponins Are Recruited to Actin-Rich Structures Generated by Pathogenic Escherichia coli, Listeria, and Salmonella. Anat Rec (Hoboken) 2018; 301:2103-2111. [PMID: 30312538 DOI: 10.1002/ar.23956] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 01/12/2023]
Abstract
The ingestion of enteropathogenic Escherichia coli (EPEC), Listeria monocytogenes, or Salmonella enterica serovar Typhimurium leads to their colonization of the intestinal lumen, which ultimately causes an array of ailments ranging from diarrhea to bacteremia. Once in the intestines, these microbes generate various actin-rich structures to attach, invade, or move within the host intestinal epithelial cells. Although an assortment of actin-associated proteins has been identified to varying degrees at these structures, the localization of many actin stabilizing proteins have yet to be analyzed. Here, we examined the recruitment of the actin-associated proteins, calponin 1 and 2 at EPEC pedestals, L. monocytogenes actin clouds, comet tails and listeriopods, and S. Typhimurium membrane ruffles. In other systems, calponins are known to bind to and stabilize actin filaments. In EPEC pedestals, calponin 1 was recruited uniformly throughout the structures while calponin 2 was enriched at the apical tip. During L. monocytogenes infections, calponin 1 was found through all the actin-rich structures generated by the bacteria, while calponin 2 was only present within actin-rich structures formed by L. monocytogenes near the host cell membrane. Finally, both calponins were found within S. Typhimurium-generated membrane ruffles. Taken together, we have shown that although calponin 1 is recruited to actin-rich structures formed by the three bacteria, calponin 2 is specifically recruited to only membrane-bound actin-rich structures formed by the bacteria. Thus, our findings suggest that calponin 2 is a novel marker for membrane-bound actin structures formed by pathogenic bacteria. Anat Rec, 301:2103-2111, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Michael Dominic Chua
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | | | - Jian-Ping Jin
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - Julian A Guttman
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
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437
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Zhang M, Gillaspy AF, Gipson JR, Cassidy BR, Nave JL, Brewer MF, Stoner JA, Chen J, Drevets DA. Neuroinvasive Listeria monocytogenes Infection Triggers IFN-Activation of Microglia and Upregulates Microglial miR-155. Front Immunol 2018; 9:2751. [PMID: 30538705 PMCID: PMC6277692 DOI: 10.3389/fimmu.2018.02751] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 11/08/2018] [Indexed: 11/17/2022] Open
Abstract
MicroRNA (miR) miR-155 modulates microglial activation and polarization, but its role in activation of microglia during bacterial brain infection is unclear. We studied miR-155 expression in brains of C57BL/6 (B6.WT) mice infected i.p. with the neuro-invasive bacterial pathogen Listeria monocytogenes (L. monocytogenes). Infected mice were treated with ampicillin starting 2 days (d) post-infection (p.i.) and analyzed 3d, 7d, and 14d p.i. Virulent L. monocytogenes strains EGD and 10403s upregulated miR-155 in whole brain 7 d p.i. whereas infection with avirulent, non-neurotropic Δhly or ΔactA L. monocytogenes mutants did not. Similarly, infection with virulent but not mutated bacteria upregulated IFN-γ mRNA in the brain at 7 d p.i. Upregulation of miR-155 in microglia was confirmed by qPCR of flow cytometry-sorted CD45intCD11bpos brain cells. Subsequently, brain leukocyte influxes and gene expression in sorted microglia were compared in L. monocytogenes-infected B6.WT and B6.Cg-Mir155tm1.1Rsky/J (B6.miR-155−/−) mice. Brain influxes of Ly-6Chigh monocytes and upregulation of IFN-related genes in microglia were similar to B6.WT mice at 3 d p.i. In contrast, by d 7 p.i. expressions of microglial IFN-related genes, including markers of M1 polarization, were significantly lower in B6.miR-155−/− mice and by 14 d p.i., influxes of activated T-lymphocytes were markedly reduced. Notably, CD45highCD11bpos brain cells from B6.miR-155−/− mice isolated at 7 d p.i. expressed 2-fold fewer IFN-γ transcripts than did cells from B6.WT mice suggesting reduced IFN-γ stimulation contributed to dampened gene expression in B6.miR-155−/− microglia. Lastly, in vitro stimulation of 7 d p.i. brain cells with heat-killed L. monocytogenes induced greater production of TNF in B6.miR-155−/− microglia than in B6.WT microglia. Thus, miR-155 affects brain inflammation by multiple mechanisms during neuroinvasive L. monocytogenes infection. Peripheral miR-155 promotes brain inflammation through its required role in optimal development of IFN-γ-secreting lymphocytes that enter the brain and activate microglia. Microglial miR-155 promotes M1 polarization, and also inhibits inflammatory responses to stimulation by heat-killed L. monocytogenes, perhaps by targeting Tab2.
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Affiliation(s)
- Miao Zhang
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Allison F Gillaspy
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States.,Laboratory for Molecular Biology and Cytometry Research, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Jenny R Gipson
- Laboratory for Molecular Biology and Cytometry Research, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Benjamin R Cassidy
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Jessica L Nave
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Misty F Brewer
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Julie A Stoner
- Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Jie Chen
- Histology and Immunohistochemistry Core, Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Douglas A Drevets
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States.,Department of Veterans Affairs Medical Center, Oklahoma City, OK, United States
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438
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Fares E, McCloskey CB, Gutierrez A, Princiotta M, Salinas LJ, Drevets DA. Vaccine strain Listeria monocytogenes bacteremia occurring 31 months after immunization. Infection 2018; 47:489-492. [PMID: 30430399 DOI: 10.1007/s15010-018-1249-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 11/08/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Listeria monocytogenes is a food-borne, facultative intracellular bacterium that causes severe diseases such as sepsis and meningoencephalitis in immunocompromised hosts. Because it stimulates robust T-lymphocyte-mediated responses, attenuated L. monocytogenes are candidate vaccine vectors for tumor immunotherapy. CASE We report a case of bacteremia caused by vaccine strain L. monocytogenes (Axalimogene filolisbac) occurring 31 months after immunization against human papilloma virus (HPV) associated cervical cancer. CONCLUSION Receipt of a L. monocytogenes-based vaccine is a novel risk factor for delayed L. monocytogenes bacteremia.
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Affiliation(s)
- Elias Fares
- Section of Infectious Diseases, Department of Internal Medicine, University of Oklahoma Health Sciences Center, 800 Stanton L. Young Blvd, Suite 7300, Oklahoma City, OK, 73104, USA
- , Erie, USA
| | - Cindy B McCloskey
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | | | | | - Linda J Salinas
- Section of Infectious Diseases, Department of Internal Medicine, University of Oklahoma Health Sciences Center, 800 Stanton L. Young Blvd, Suite 7300, Oklahoma City, OK, 73104, USA
| | - Douglas A Drevets
- Section of Infectious Diseases, Department of Internal Medicine, University of Oklahoma Health Sciences Center, 800 Stanton L. Young Blvd, Suite 7300, Oklahoma City, OK, 73104, USA.
- Medical Services, Department of Veterans Affairs Medical Center, Oklahoma City, OK, USA.
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439
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BoseDasgupta S, Pieters J. Macrophage-microbe interaction: lessons learned from the pathogen Mycobacterium tuberculosis. Semin Immunopathol 2018; 40:577-591. [PMID: 30306257 DOI: 10.1007/s00281-018-0710-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 09/17/2018] [Indexed: 02/07/2023]
Abstract
Macrophages, being the cornerstone of the immune system, have adapted the ancient nutrient acquisition mechanism of phagocytosis to engulf various infectious organisms thereby helping to orchestrate an appropriate host response. Phagocytosis refers to the process of internalization and degradation of particulate material, damaged and senescent cells and microorganisms by specialized cells, after which the vesicle containing the ingested particle, the phagosome, matures into acidic phagolysosomes upon fusion with hydrolytic enzyme-containing lysosomes. The destructive power of the macrophage is further exacerbated through the induction of macrophage activation upon a variety of inflammatory stimuli. Despite being the end-point for many phagocytosed microbes, the macrophage can also serve as an intracellular survival niche for a number of intracellular microorganisms. One microbe that is particularly successful at surviving within macrophages is the pathogen Mycobacterium tuberculosis, which can efficiently manipulate the macrophage at several levels, including modulation of the phagocytic pathway as well as interfering with a number of immune activation pathways that normally would lead to eradication of the internalized bacilli. M. tuberculosis excels at circumventing destruction within macrophages, thus establishing itself successfully for prolonged times within the macrophage. In this contribution, we describe a number of general features of macrophages in the context of their function to clear an infection, and highlight the strategies employed by M. tuberculosis to counter macrophage attack. Interestingly, research on the evasion tactics employed by M. tuberculosis within macrophages not only helps to design strategies to curb tuberculosis, but also allows a better understanding of host cell biology.
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Affiliation(s)
- Somdeb BoseDasgupta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
| | - Jean Pieters
- Department of Biochemistry, Biozentrum, University of Basel, 50-70 Klingelbergstrasse, 4056, Basel, Switzerland.
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440
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Wałecka-Zacharska E, Gmyrek R, Skowron K, Kosek-Paszkowska K, Bania J. Duration of Heat Stress Effect on Invasiveness of L. monocytogenes Strains. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1457480. [PMID: 30402461 PMCID: PMC6198540 DOI: 10.1155/2018/1457480] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/25/2018] [Accepted: 09/13/2018] [Indexed: 01/17/2023]
Abstract
During food production and food conservation, as well as the passage through the human gastrointestinal (GI) tract, L. monocytogenes is exposed to many adverse conditions which may elicit a stress response. As a result the pathogen may become more resistant to other unpropitious factors and may change its virulence. It has been shown that low and high temperature, salt, low pH, and high pressure affect the invasion capacity of L. monocytogenes. However, there is a scarcity of data on the duration of the stress effect on bacterial biology, including invasiveness. The aim of this work was to determine the period during which L. monocytogenes invasiveness remains altered under optimal conditions following exposure of bacteria to mild heat shock stress. Ten L. monocytogenes strains were exposed to heat shock at 54°C for 20 minutes. Then both heat-treated and nontreated control bacteria were incubated under optimal growth conditions, 37°C, for up to 72 hours and the invasion capacity was tested. Additionally, the expression of virulence and stress response genes was investigated in 2 strains. We found that heat stress exposure significantly decreases the invasiveness of all tested strains. However, during incubation at 37°C the invasion capacity of heat-treated strains recovered to the level of nontreated controls. The observed effect was strain-dependent and lasted from less than 24 hours to 72 hours. The invasiveness of 6 out of the 10 nontreated strains decreased during incubation at 37°C. The expression of inlAB correlated with the increase of invasiveness but the decrease of invasiveness did not correlate with changes of the level of these transcripts. Conclusions. The effect of heat stress on L. monocytogenes invasiveness is strain-dependent and was transient, lasting up to 72 hours.
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Affiliation(s)
- Ewa Wałecka-Zacharska
- Department of Food Hygiene and Consumer Health Protection, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Renata Gmyrek
- Department of Food Hygiene and Consumer Health Protection, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Krzysztof Skowron
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, Bydgoszcz, Poland
| | - Katarzyna Kosek-Paszkowska
- Department of Food Hygiene and Consumer Health Protection, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Jacek Bania
- Department of Food Hygiene and Consumer Health Protection, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
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441
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Abstract
Listeria monocytogenes is an intracellular bacterial pathogen that is frequently associated with food-borne infection. The ability of L. monocytogenes to cross the blood-brain barrier (BBB) is concerning as it can lead to life-threatening meningitis and encephalitis. The BBB protects the brain microenvironment from various toxic metabolites and microbial pathogens found in the blood following infection, and therefore supports brain homeostasis. The mechanisms by which L. monocytogenes present in the bloodstream cross the BBB to cause brain infections are not fully understood and there is also a lack of a robust model system to study brain infections by L. monocytogenes. Here, we present a simple mouse infection model to determine whether bacteria have crossed the BBB and to quantitate the burden of bacteria that have colonized the brain in vivo. In this method, animals were infected intravenously with L. monocytogenes and were humanely euthanized by exposure to CO2 followed by cervical dislocation. Cardiac perfusion of the animals was performed prior to harvesting infected organs. Blood was collected before perfusion and the number of bacteria per organ or mL of blood was determined by plating dilutions of the blood or organ homogenates on agar plates and counting the number of colonies formed. This method can be used to study novel receptor-ligand interactions that enhance infection of the brain by L. monocytogenes and can be easily adapted for the study of multiple bacterial pathogens.
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Affiliation(s)
- Pallab Ghosh
- Department of Microbiology and Immunobiology, Harvard Medical School;
| | - Darrren E Higgins
- Department of Microbiology and Immunobiology, Harvard Medical School;
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442
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Roberts MF, Khan HM, Goldstein R, Reuter N, Gershenson A. Search and Subvert: Minimalist Bacterial Phosphatidylinositol-Specific Phospholipase C Enzymes. Chem Rev 2018; 118:8435-8473. [DOI: 10.1021/acs.chemrev.8b00208] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mary F. Roberts
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | | | - Rebecca Goldstein
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | | | - Anne Gershenson
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
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443
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Marini E, Magi G, Ferretti G, Bacchetti T, Giuliani A, Pugnaloni A, Rippo MR, Facinelli B. Attenuation of Listeria monocytogenes Virulence by Cannabis sativa L. Essential Oil. Front Cell Infect Microbiol 2018; 8:293. [PMID: 30186775 PMCID: PMC6113369 DOI: 10.3389/fcimb.2018.00293] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/31/2018] [Indexed: 12/15/2022] Open
Abstract
Anti-virulence strategies are being explored as a novel approach to combat pathogens. Such strategies include inhibition of surface adhesion, tissue invasion, toxin production, and/or interference with the gene regulation of other virulence traits. Listeria monocytogenes, the causative agent of listeriosis, is a facultative intracellular food pathogen characterized by a wide distribution in the environment. Its ability to persist within biofilms and to develop resistance to sanitizers is the cause of significant problems in food processing plants and of steep costs for the food industry. In humans, the treatment of listeriosis is hampered by the intracellular location of listeriae and the poor intracellular penetration of some antibiotics. Eleven L. monocytogenes isolates from patients who were diagnosed with invasive listeriosis in Italy in 2014-2016 were studied. This in vitro and in vivo study explored the antibacterial and anti-virulence properties of a steam-distilled essential oil of Cannabis sativa L., which is being intensively investigated for its high content in powerful bioactive phytochemicals. Susceptibility experiments demonstrated a moderate bactericidal activity of the essential oil (Minimum Bactericidal Concentration > 2048 μg/mL). Assessment of the effects of sublethal concentrations of the essential oil on L. monocytogenes virulence traits demonstrated a significant action on motility. Listeriae were non-motile after exposure to the essential oil. Light and scanning electron microscopy documented aggregates of listeriae with the flagella trapped inside the cluster. Real-time RT-PCR experiments showed downregulation of flagellar motility genes and of the regulatory gene prfA. The ability to form biofilm and to invade Caco-2 cells was also significantly reduced. Galleria mellonella larvae infected with L. monocytogenes grown in presence of sublethal concentrations of the essential oil showed much higher survival rates compared with controls, suggesting that the extract inhibited tissue invasion. Food contamination with L. monocytogenes is a major concern for the food industry, particularly for plants making ready-to-eat and processed food. The present work provides a baseline in the study of the anti-virulence properties of the C. sativa essential oil against L. monocytogenes. Further studies are needed to understand if it could be used as an alternative agent for the control of L. monocytogenes in food processing plants.
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Affiliation(s)
- Emanuela Marini
- Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Gloria Magi
- Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
| | - Gianna Ferretti
- Department of Clinical Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Tiziana Bacchetti
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Angelica Giuliani
- Division of Pathology, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Armanda Pugnaloni
- Division of Pathology, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Maria Rita Rippo
- Division of Pathology, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Bruna Facinelli
- Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy
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444
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Flickinger JC, Rodeck U, Snook AE. Listeria monocytogenes as a Vector for Cancer Immunotherapy: Current Understanding and Progress. Vaccines (Basel) 2018; 6:E48. [PMID: 30044426 PMCID: PMC6160973 DOI: 10.3390/vaccines6030048] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/21/2018] [Accepted: 07/23/2018] [Indexed: 01/10/2023] Open
Abstract
Listeria monocytogenes, a Gram-positive facultative anaerobic bacterium, is becoming a popular vector for cancer immunotherapy. Indeed, multiple vaccines have been developed utilizing modified Listeria as a tool for generating immune responses against a variety of cancers. Moreover, over a dozen clinical trials testing Listeria cancer vaccines are currently underway, which will help to understand the utility of Listeria vaccines in cancer immunotherapy. This review aims to summarize current views on how Listeria-based vaccines induce potent antitumor immunity and the current state of Listeria-based cancer vaccines in clinical trials.
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Affiliation(s)
- John C Flickinger
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA 19107, USA.
| | - Ulrich Rodeck
- Department of Dermatology, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA 19107, USA.
| | - Adam E Snook
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA 19107, USA.
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445
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King MT, Huh I, Shenai A, Brooks TM, Brooks CL. Structural basis of V HH-mediated neutralization of the food-borne pathogen Listeria monocytogenes. J Biol Chem 2018; 293:13626-13635. [PMID: 29976754 DOI: 10.1074/jbc.ra118.003888] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/01/2018] [Indexed: 12/12/2022] Open
Abstract
Listeria monocytogenes causes listeriosis, a potentially fatal food-borne disease. The condition is especially harmful to pregnant women. Listeria outbreaks can originate from diverse foods, highlighting the need for novel strategies to improve food safety. The first step in Listeria invasion is internalization of the bacteria, which is mediated by the interaction of the internalin family of virulence factors with host cell receptors. A crucial interaction for Listeria invasion of the placenta, and thus a target for therapeutic intervention, is between internalin B (InlB) and the receptor c-Met. Single-domain antibodies (VHH, also called nanobodies, or sdAbs) from camel heavy-chain antibodies are a novel solution for preventing Listeria infections. The VHH R303, R330, and R326 all bind InlB with high affinity; however, the molecular mechanism behind their mode of action was unknown. We demonstrate that despite a high degree of sequence and structural diversity, the VHH bind a single epitope on InlB. A combination of gentamicin protection assays and florescent microscopy establish that InlB-specific VHH inhibit Listeria invasion of HeLa cells. A high-resolution X-ray structure of VHH R303 in complex with InlB showed that the VHH binds at the c-Met interaction site on InlB, thereby acting as a competitive inhibitor preventing bacterial invasion. These results point to the potential of VHH as a novel class of therapeutics for the prevention of listeriosis.
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Affiliation(s)
- Moeko Toride King
- From the Department of Chemistry, California State University, Fresno, California 93740
| | - Ian Huh
- From the Department of Chemistry, California State University, Fresno, California 93740
| | - Akhilesh Shenai
- From the Department of Chemistry, California State University, Fresno, California 93740
| | - Teresa M Brooks
- From the Department of Chemistry, California State University, Fresno, California 93740
| | - Cory L Brooks
- From the Department of Chemistry, California State University, Fresno, California 93740
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446
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Zhu X, Liu D, Singh AK, Drolia R, Bai X, Tenguria S, Bhunia AK. Tunicamycin Mediated Inhibition of Wall Teichoic Acid Affects Staphylococcus aureus and Listeria monocytogenes Cell Morphology, Biofilm Formation and Virulence. Front Microbiol 2018; 9:1352. [PMID: 30034372 PMCID: PMC6043806 DOI: 10.3389/fmicb.2018.01352] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/05/2018] [Indexed: 12/14/2022] Open
Abstract
The emergence of bacterial resistance to therapeutic antibiotics limits options for treatment of common microbial diseases. Subinhibitory antibiotics dosing, often aid in the emergence of resistance, but its impact on pathogen’s physiology and pathogenesis is not well understood. Here we investigated the effect of tunicamycin, a cell wall teichoic acid (WTA) biosynthesis inhibiting antibiotic at the subinhibitory dosage on Staphylococcus aureus and Listeria monocytogenes physiology, antibiotic cross-resistance, biofilm-formation, and virulence. Minimum inhibitory concentration (MIC) of tunicamycin to S. aureus and L. monocytogenes was 20–40 μg/ml and 2.5–5 μg/ml, respectively, and the subinhibitory concentration was 2.5–5 μg/ml and 0.31–0.62 μg/ml, respectively. Tunicamycin pre-exposure reduced cellular WTA levels by 18–20% and affected bacterial cell wall ultrastructure, cell membrane permeability, morphology, laser-induced colony scatter signature, and bacterial ability to form biofilms. It also induced a moderate level of cross-resistance to tetracycline, ampicillin, erythromycin, and meropenem for S. aureus, and ampicillin, erythromycin, vancomycin, and meropenem for L. monocytogenes. Pre-treatment of bacterial cells with subinhibitory concentrations of tunicamycin also significantly reduced bacterial adhesion to and invasion into an enterocyte-like Caco-2 cell line, which is supported by reduced expression of key virulence factors, Internalin B (InlB) and Listeria adhesion protein (LAP) in L. monocytogenes, and a S. aureus surface protein A (SasA) in S. aureus. Tunicamycin-treated bacteria or the bacterial WTA preparation suppressed NF-κB and inflammatory cytokine production (TNFα, and IL-6) from murine macrophage cell line (RAW 264.7) indicating the reduced WTA level possibly attenuates an inflammatory response. These results suggest that at the subinhibitory dosage, tunicamycin-mediated inhibition of WTA biosynthesis interferes with cell wall structure, pathogens infectivity and inflammatory response, and ability to form biofilms but promotes the development of antibiotic cross-resistance.
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Affiliation(s)
- Xingyue Zhu
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States.,College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Dongqi Liu
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
| | - Atul K Singh
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
| | - Rishi Drolia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
| | - Xingjian Bai
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
| | - Shivendra Tenguria
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States
| | - Arun K Bhunia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, United States.,Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, United States
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447
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Ireton K, Van Ngo H, Bhalla M. Interaction of microbial pathogens with host exocytic pathways. Cell Microbiol 2018; 20:e12861. [PMID: 29797532 DOI: 10.1111/cmi.12861] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 05/13/2018] [Indexed: 02/06/2023]
Abstract
Many microbial pathogens co-opt or perturb host membrane trafficking pathways. This review covers recent examples in which microbes interact with host exocytosis, the fusion of intracellular vesicles with the plasma membrane. The bacterial pathogens Listeria monocytogenes and Staphylococcus aureus subvert recycling endosomal pathways of exocytosis in order to induce their entry into human cells. By contrast, entry of the protozoan pathogen Trypanosoma cruzi or the virus adenovirus into host cells involves exploitation of lysosomal exocytosis. Toxins produced by Bacillus anthracis or Vibrio cholerae interfere with exocytosis pathways mediated by the GTPase Rab11 and the exocyst complex. By doing so, anthrax or cholera toxins impair recycling of cadherins to cell-cell junctions and disrupt the barrier properties of endothelial cells or intestinal epithelial cells, respectively. Uropathogenic Escherichia coli (UPEC) is expelled from bladder epithelial cells through two different exocytic routes that involve sensing of bacteria in vacuoles by host Toll-like receptor 4 (TLR4) or monitoring of the pH of lysosomes harbouring UPEC. The TLR4 pathway is mediated by multiple Rab GTPases and the exocyst, whereas the other pathway involves exocytosis of lysosomes. Expulsion of UPEC through these pathways is thought to benefit the host.
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Affiliation(s)
- Keith Ireton
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Hoan Van Ngo
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Manmeet Bhalla
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
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Roy B, Philippe C, Loessner MJ, Goulet J, Moineau S. Production of Bacteriophages by Listeria Cells Entrapped in Organic Polymers. Viruses 2018; 10:E324. [PMID: 29899227 PMCID: PMC6024803 DOI: 10.3390/v10060324] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 06/07/2018] [Accepted: 06/08/2018] [Indexed: 12/29/2022] Open
Abstract
Applications for bacteriophages as antimicrobial agents are increasing. The industrial use of these bacterial viruses requires the production of large amounts of suitable strictly lytic phages, particularly for food and agricultural applications. This work describes a new approach for phage production. Phages H387 (Siphoviridae) and A511 (Myoviridae) were propagated separately using Listeria ivanovii host cells immobilised in alginate beads. The same batch of alginate beads could be used for four successive and efficient phage productions. This technique enables the production of large volumes of high-titer phage lysates in continuous or semi-continuous (fed-batch) cultures.
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Affiliation(s)
- Brigitte Roy
- Département de Biochimie, de Microbiologie et de Bio-Informatique, Faculté des Sciences et de Génie, Université Laval, Québec, QC G1V OA6, Canada.
- Département des Sciences des Aliments, Faculté des Sciences de L'agriculture et de L'alimentation, Université Laval, Québec, QC G1V OA6, Canada.
- Félix d'Hérelle Reference Center for Bacterial Viruses and GREB, Faculté de Médecine Dentaire, Université Laval, Québec, QC G1V OA6, Canada.
| | - Cécile Philippe
- Département de Biochimie, de Microbiologie et de Bio-Informatique, Faculté des Sciences et de Génie, Université Laval, Québec, QC G1V OA6, Canada.
- Félix d'Hérelle Reference Center for Bacterial Viruses and GREB, Faculté de Médecine Dentaire, Université Laval, Québec, QC G1V OA6, Canada.
| | - Martin J Loessner
- ETH Zurich, Institute of Food, Nutrition and Health, Schmelzbergstrasse, 7CH-8092 Zürich, Switzerland.
| | - Jacques Goulet
- Département des Sciences des Aliments, Faculté des Sciences de L'agriculture et de L'alimentation, Université Laval, Québec, QC G1V OA6, Canada.
| | - Sylvain Moineau
- Département de Biochimie, de Microbiologie et de Bio-Informatique, Faculté des Sciences et de Génie, Université Laval, Québec, QC G1V OA6, Canada.
- Félix d'Hérelle Reference Center for Bacterial Viruses and GREB, Faculté de Médecine Dentaire, Université Laval, Québec, QC G1V OA6, Canada.
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Castellano P, Pérez Ibarreche M, Longo Borges L, Niño Arias FC, Ross GR, De Martinis ECP. Lactobacillus spp. impair the ability of Listeria monocytogenes FBUNT to adhere to and invade Caco-2 cells. Biotechnol Lett 2018; 40:1237-1244. [PMID: 29948513 DOI: 10.1007/s10529-018-2572-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 05/18/2018] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The objective of this study was to evaluate the ability of Lactobacillus curvatus CRL705, CRL1532, and CRL1533 and Lactobacillus sakei CRL1613 to survive under simulated gastrointestinal conditions. Moreover, a microencapsulation approach was proposed to improve gastrointestinal survival. Finally, experiments were performed to demonstrate that Lactobacillus spp. can modulate the ability of Listeria monocytogenes FBUNT to adhere to and invade Caco-2 cells. RESULTS Lactobacillus strains were encapsulated in alginate beads to enhance the survival of bacteria under in vitro gastrointestinal conditions. All strains hydrolyzed bile salts using chenodeoxycholic acid as a substrate and adhered to Caco-2 cells. Cell-free supernatants (CFSs) showed antimicrobial activity against L. monocytogenes as demonstrated by agar diffusion assays. The average percentages of L. monocytogenes adhesion decreased from 67.74 to 41.75 and 38.7% in the presence of 50 and 90% (v/v), respectively, for all CFSs tested. The highest concentrations of CFSs completely inhibited the L. monocytogenes invasion of Caco-2 cells. CONCLUSIONS The studied Lactobacillus strains have protective effects against the adhesion and invasion of L. monocytogenes FBUNT. Alginate encapsulation of these bacteria improved gastrointestinal tolerance such that they could be further studied as potential probiotics against intestinal pathogenic bacteria.
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Affiliation(s)
- P Castellano
- Centro de Referencia para Lactobacilos (CERELA-CONICET), Chacabuco 145, 4000, Tucumán, Argentina.
| | - M Pérez Ibarreche
- Centro de Referencia para Lactobacilos (CERELA-CONICET), Chacabuco 145, 4000, Tucumán, Argentina
| | - L Longo Borges
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto - USP, Av. do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-903, Brazil
| | - F C Niño Arias
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto - USP, Av. do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-903, Brazil
| | - G R Ross
- Instituto de Biotecnología farmacéutica y alimentaria (INBIOFAL-CONICET), Av Kichner, 4000, Tucumán, Argentina
| | - E C Pereira De Martinis
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto - USP, Av. do Café s/n, Monte Alegre, Ribeirão Preto, SP, 14040-903, Brazil
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Siqueira MDS, Ribeiro RDM, Travassos LH. Autophagy and Its Interaction With Intracellular Bacterial Pathogens. Front Immunol 2018; 9:935. [PMID: 29875765 PMCID: PMC5974045 DOI: 10.3389/fimmu.2018.00935] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 04/16/2018] [Indexed: 12/20/2022] Open
Abstract
Cellular responses to stress can be defined by the overwhelming number of changes that cells go through upon contact with and stressful conditions such as infection and modifications in nutritional status. One of the main cellular responses to stress is autophagy. Much progress has been made in the understanding of the mechanisms involved in the induction of autophagy during infection by intracellular bacteria. This review aims to discuss recent findings on the role of autophagy as a cellular response to intracellular bacterial pathogens such as, Streptococcus pyogenes, Mycobacterium tuberculosis, Shigella flexneri, Salmonella typhimurium, Listeria monocytogenes, and Legionella pneumophila, how the autophagic machinery senses these bacteria directly or indirectly (through the detection of bacteria-induced nutritional stress), and how some of these bacterial pathogens manage to escape from autophagy.
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Affiliation(s)
- Mariana da Silva Siqueira
- Laboratory of Immunoreceptors and Signaling, Immunobiology Program, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renato de Moraes Ribeiro
- Laboratory of Immunoreceptors and Signaling, Immunobiology Program, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leonardo H Travassos
- Laboratory of Immunoreceptors and Signaling, Immunobiology Program, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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