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Magagna G, Gori M, Russini V, De Angelis V, Spinelli E, Filipello V, Tranquillo VM, De Marchis ML, Bossù T, Fappani C, Tanzi E, Finazzi G. Evaluation of the Virulence Potential of Listeria monocytogenes through the Characterization of the Truncated Forms of Internalin A. Int J Mol Sci 2023; 24:10141. [PMID: 37373288 DOI: 10.3390/ijms241210141] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Listeria monocytogenes is a widespread Gram-positive pathogenic bacterium that causes listeriosis, a rather rare but severe foodborne disease. Pregnant women, infants, the elderly, and immunocompromised individuals are considered particularly at risk. L. monocytogenes can contaminate food and food-processing environments. In particular, ready-to-eat (RTE) products are the most common source associated with listeriosis. L. monocytogenes virulence factors include internalin A (InlA), a surface protein known to facilitate bacterial uptake by human intestinal epithelial cells that express the E-cadherin receptor. Previous studies have demonstrated that the presence of premature stop codon (PMSC) mutations naturally occurring in inlA lead to the production of a truncated protein correlated with attenuate virulence. In this study, 849 L. monocytogenes isolates, collected from food, food-processing plants, and clinical cases in Italy, were typed and analyzed for the presence of PMSCs in the inlA gene using Sanger sequencing or whole-genome sequencing (WGS). PMSC mutations were found in 27% of the isolates, predominantly in those belonging to hypovirulent clones (ST9 and ST121). The presence of inlA PMSC mutations in food and environmental isolates was higher than that in clinical isolates. The results reveal the distribution of the virulence potential of L. monocytogenes circulating in Italy and could help to improve risk assessment approaches.
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Affiliation(s)
- Giulia Magagna
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
| | - Maria Gori
- Department of Health Sciences, Università degli Studi di Milano, 20133 Milan, Italy
- Coordinated Research Centre EpiSoMI, Università degli Studi di Milano, 20133 Milan, Italy
| | - Valeria Russini
- Food Microbiology Unit, Istituto Zooprofilattico Sperimentale del Lazio e della Toscana "M. Aleandri", Via Appia Nuova, 1411, 00178 Rome, Italy
| | - Veronica De Angelis
- Food Microbiology Unit, Istituto Zooprofilattico Sperimentale del Lazio e della Toscana "M. Aleandri", Via Appia Nuova, 1411, 00178 Rome, Italy
| | - Elisa Spinelli
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
| | - Virginia Filipello
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
| | - Vito Massimo Tranquillo
- Programmazione dei Servizi e Controllo di Gestione, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
| | - Maria Laura De Marchis
- Food Microbiology Unit, Istituto Zooprofilattico Sperimentale del Lazio e della Toscana "M. Aleandri", Via Appia Nuova, 1411, 00178 Rome, Italy
| | - Teresa Bossù
- Food Microbiology Unit, Istituto Zooprofilattico Sperimentale del Lazio e della Toscana "M. Aleandri", Via Appia Nuova, 1411, 00178 Rome, Italy
| | - Clara Fappani
- Department of Health Sciences, Università degli Studi di Milano, 20133 Milan, Italy
- Coordinated Research Centre EpiSoMI, Università degli Studi di Milano, 20133 Milan, Italy
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20122 Milan, Italy
| | - Elisabetta Tanzi
- Department of Health Sciences, Università degli Studi di Milano, 20133 Milan, Italy
- Coordinated Research Centre EpiSoMI, Università degli Studi di Milano, 20133 Milan, Italy
| | - Guido Finazzi
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
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Wu M, Dong Q, Song X, Xu L, Xia X, Aslam MZ, Ma Y, Qin X, Wang X, Liu Y, Xu B, Liu H, Cai H, Hirata T, Li Z. Effective combination of nisin and sesamol against Listeria monocytogenes. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Magagna G, Finazzi G, Filipello V. Newly Designed Primers for the Sequencing of the inlA Gene of Lineage I and II Listeria monocytogenes Isolates. Int J Mol Sci 2022; 23:ijms232214106. [PMID: 36430584 PMCID: PMC9698914 DOI: 10.3390/ijms232214106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/14/2022] [Accepted: 11/14/2022] [Indexed: 11/17/2022] Open
Abstract
Listeria monocytogenes is a major human foodborne pathogen responsible for listeriosis. The virulence factor Internalin A (inlA) has a key role in the invasion of L. monocytogenes into the human intestinal epithelium, and the presence of premature stop-codons (PMSC) mutations in the inlA gene sequence is correlated with attenuated virulence. The inlA sequencing process is carried out by dividing the gene into three sections which are then reassembled to obtain the full gene. The primers available however were only able to entirely amplify the lineage II isolates. In this study, we present a set of new primers which allow inlA sequencing of isolates belonging to both lineages, since lineage I isolates are the ones most frequently associated to clinical cases. Using newly designed primers, we assessed the presence of inlA PMSCs in food, food processing environments and clinical isolates.
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Affiliation(s)
- Giulia Magagna
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
- Correspondence: ; Tel.: +39-0302-2906-11
| | - Guido Finazzi
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
- Centro di Referenza Nazionale per i Rischi Emergenti in Sicurezza Alimentare—CRESA, Via A. Bianchi 9, 25124 Brescia, Italy
| | - Virginia Filipello
- Food Safety Department, Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna (IZSLER), Via A. Bianchi 9, 25124 Brescia, Italy
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Inhibitory effect of protocatechualdehyde on Yersinia enterocolitica and its critical virulence factors. Microb Pathog 2022; 173:105877. [DOI: 10.1016/j.micpath.2022.105877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/23/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022]
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Gou H, Liu Y, Shi W, Nan J, Wang C, Sun Y, Cao Q, Wei H, Song C, Tian C, Wei Y, Xue H. The Characteristics and Function of Internalin G in Listeria monocytogenes. Pol J Microbiol 2022; 71:63-71. [PMID: 35635167 PMCID: PMC9152910 DOI: 10.33073/pjm-2022-009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/10/2022] [Indexed: 11/05/2022] Open
Abstract
In order to clarified characteristics and function of internalin G (inlG) in Listeria monocytogenes ATCC®19111 (1/2a) (LM), the immune protection of the inlG was evaluated in mice, the homologous recombination was used to construct inlG deletion strains, and their biological characteristics were studied by the transcriptomics analysis. As a result, the immunization of mice with the purified protein achieved a protective effect against bacterial infection. The deletion strain LM-AinlG was successfully constructed with genetic stability. The mouse infection test showed that the virulence of LM was decreased after the deletion of the inlG gene. The deletion strain showed enhanced adhesion to and invasion of Caco-2 cells. Compared to the wild strain, 18 genes were up-regulated, and 24 genes were down-regulated in the LM-AinlG. This study has laid a foundation for further research on the function of inlG and the pathogenesis of LM. In this study, immunization of mice with the purified inlG protein achieved a protective effect against Listeria monocytogenes infection. The virulence of LM-ΔinlG was decreased by mouse infection. However, the adhesion and invasion ability to Caco-2 cell were enhanced. Compared to the wild strain, 18 genes were up-regulated, and 24 genes were down-regulated in the LM-ΔinlG. This study has laid a foundation for further study of the function of the inlG and the listeriosis.
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Affiliation(s)
- Huitian Gou
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yuanyuan Liu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Wenjing Shi
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Jinyu Nan
- Jiuquan City Animal Control Disease Center, Jiuquan, China
| | - Chuan Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yanan Sun
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Qihang Cao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Huilin Wei
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Chen Song
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Changqing Tian
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yanquan Wei
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Huiwen Xue
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
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Whole-Genome Sequencing Characterization of Virulence Profiles of Listeria monocytogenes Food and Human Isolates and In Vitro Adhesion/Invasion Assessment. Microorganisms 2021; 10:microorganisms10010062. [PMID: 35056510 PMCID: PMC8779253 DOI: 10.3390/microorganisms10010062] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/23/2021] [Accepted: 12/23/2021] [Indexed: 12/18/2022] Open
Abstract
Listeria monocytogenes (Lm) is the causative agent of human listeriosis. Lm strains have different virulence potential. For this reason, we preliminarily characterised via Whole-Genome Sequencing (WGS) some Lm strains for their key genomic features and virulence-associated determinants, assigning the clonal complex (CC). Moreover, the ability of the same strains to adhere to and invade human colon carcinoma cell line Caco-2, evaluating the possible correspondence with their genetic virulence profile, was also assessed. The clinical strains typed belonged to clonal complex (CC)1, CC31, and CC101 and showed a very low invasiveness. The Lm strains isolated from food were assigned to CC1, CC7, CC9, and CC121. All CC1 carried the hypervirulence pathogenicity island LIPI-3 in addition to LIPI-1. Premature stop codons in the inlA gene were found only in Lm of food origin belonging to CC9 and CC121. The presence of LIPI2_inlII was observed in all the CCs except CC1. The CC7 strain, belonging to an epidemic cluster, also carried the internalin genes inlG and inlL and showed the highest level of invasion. In contrast, the human CC31 strain lacked the lapB and vip genes and presented the lowest level of invasiveness. In Lm, the genetic determinants of hypo- or hypervirulence are not necessarily predictive of a cell adhesion and/or invasion ability in vitro. Moreover, since listeriosis results from the interplay between host and virulence features of the pathogen, even hypovirulent clones are able to cause infection in immunocompromised people.
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Agostinho Davanzo EF, dos Santos RL, Castro VHDL, Palma JM, Pribul BR, Dallago BSL, Fuga B, Medeiros M, Titze de Almeida SS, da Costa HMB, Rodrigues DDP, Lincopan N, Perecmanis S, Santana AP. Molecular characterization of Salmonella spp. and Listeria monocytogenes strains from biofilms in cattle and poultry slaughterhouses located in the federal District and State of Goiás, Brazil. PLoS One 2021; 16:e0259687. [PMID: 34767604 PMCID: PMC8589217 DOI: 10.1371/journal.pone.0259687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 10/23/2021] [Indexed: 10/26/2022] Open
Abstract
Listeria monocytogenes and Salmonella spp. are considered important foodborne pathogens that are commonly associated with foods of animal origin. The aim of this study was to perform molecular characterization of L. monocytogenes and Salmonella spp. isolated from biofilms of cattle and poultry slaughterhouses located in the Federal District and State of Goiás, Brazil. Fourteen L. monocytogenes isolates and one Salmonella sp. were detected in poultry slaughterhouses. No isolates were detected in cattle slaughterhouses. All L. monocytogenes isolates belonged to lineage II, and 11 different pulsotypes were detected. Pulsed-field gel electrophoresis analysis revealed the dissemination of two strains within one plant, in addition to the regional dissemination of one of them. The Salmonella isolate was identified via whole genome sequencing as Salmonella enterica serovar Minnesota ST548. In the sequence analysis, no premature stop codons were detected in the inlA gene of Listeria. All isolates demonstrated the ability to adhere to Caco-2 cells, while 50% were capable of invading them. Antimicrobial resistance was detected in 57.1% of the L. monocytogenes isolates, and resistance to sulfonamide was the most common feature. The tetC, ermB, and tetM genes were detected, and four isolates were classified as multidrug-resistant. Salmonella sp. was resistant to nine antimicrobials and was classified as multidrug-resistant. Resistance genes qnrB19, blaCMY-2, aac(6')-Iaa, sul2, and tetA, and a mutation in the parC gene were detected. The majority (78.5%) of the L. monocytogenes isolates were capable of forming biofilms after incubation at 37°C for 24 h, and 64.3% were capable of forming biofilms after incubation at 12°C for 168 h. There was no statistical difference in the biofilm-forming capacity under the different evaluated conditions. Salmonella sp. was capable of forming biofilms at both tested temperatures. Biofilm characterization was confirmed by collecting the samples consistently, at the same sampling points, and by assessing biofilm formation in vitro. These results highlight the potential risk of cross-contamination in poultry slaughterhouses and the importance of surveillance and pathogen control maintenance programs within the meat production industry.
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Affiliation(s)
| | | | | | - Joana Marchesini Palma
- Faculty of Agronomy and Veterinary Medicine, University of Brasília (UnB), Brasília, DF, Brazil
| | - Bruno Rocha Pribul
- National Reference Laboratory for Bacterial Enteric Infections, Oswaldo Cruz Institute, Manguinhos, Rio de Janeiro, RJ, Brazil
| | | | - Bruna Fuga
- Laboratory of Bacterial Resistance and Therapeutic Alternatives, Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Margareti Medeiros
- Faculty of Agronomy and Veterinary Medicine, University of Brasília (UnB), Brasília, DF, Brazil
| | | | | | - Dália dos Prazeres Rodrigues
- National Reference Laboratory for Bacterial Enteric Infections, Oswaldo Cruz Institute, Manguinhos, Rio de Janeiro, RJ, Brazil
| | - Nilton Lincopan
- Laboratory of Bacterial Resistance and Therapeutic Alternatives, Biomedical Sciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Simone Perecmanis
- Faculty of Agronomy and Veterinary Medicine, University of Brasília (UnB), Brasília, DF, Brazil
| | - Angela Patrícia Santana
- Faculty of Agronomy and Veterinary Medicine, University of Brasília (UnB), Brasília, DF, Brazil
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