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Kreling V, Falcone FH, Herrmann F, Kemper L, Amiteye D, Cord-Landwehr S, Kehrenberg C, Moerschbacher BM, Hensel A. High molecular/low acetylated chitosans reduce adhesion of Campylobacter jejuni to host cells by blocking JlpA. Appl Microbiol Biotechnol 2024; 108:171. [PMID: 38265503 PMCID: PMC10810038 DOI: 10.1007/s00253-024-13000-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 12/21/2023] [Accepted: 12/30/2023] [Indexed: 01/25/2024]
Abstract
Infections caused by Campylobacter spp. are a major cause of severe enteritis worldwide. Multifactorial prevention strategies are necessary to reduce the prevalence of Campylobacter. In particular, antiadhesive strategies with specific inhibitors of early host-pathogen interaction are promising approaches to reduce the bacterial load. An in vitro flow cytometric adhesion assay was established to study the influence of carbohydrates on the adhesion of C. jejuni to Caco-2 cells. Chitosans with a high degree of polymerization and low degree of acetylation were identified as potent antiadhesive compounds, exerting significant reduction of C. jejuni adhesion to Caco-2 cells at non-toxic concentrations. Antiadhesive and also anti-invasive effects were verified by confocal laser scanning microscopy. For target identification, C. jejuni adhesins FlpA and JlpA were expressed in Escherichia coli ArcticExpress, and the influence of chitosan on binding to fibronectin and HSP90α, respectively, was investigated. While no effects on FlpA binding were found, a strong inhibition of JlpA-HSP90α binding was observed. To simulate real-life conditions, chicken meat was inoculated with C. jejuni, treated with antiadhesive chitosan, and the bacterial load was quantified. A strong reduction of C. jejuni load was observed. Atomic force microscopy revealed morphological changes of C. jejuni after 2 h of chitosan treatment, indicating disturbance of the cell wall and sacculi formation by electrostatic interaction of positively charged chitosan with the negatively charged cell surface. In conclusion, our data indicate promising antiadhesive and anti-invasive potential of high molecular weight, strongly de-acetylated chitosans for reducing C. jejuni load in livestock and food production. KEY POINTS: • Antiadhesive effects of chitosan with high DP/low DA against C. jejuni to host cells • Specific targeting of JlpA/Hsp90α interaction by chitosan • Meat treatment with chitosan reduces C. jejuni load.
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Affiliation(s)
- Vanessa Kreling
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Corrensstraße 48, 48149, Münster, Germany
| | - Franco H Falcone
- Institute of Parasitology, Justus Liebig University Giessen, Schubertstraße 81, 35392, Giessen, Germany
| | - Fabian Herrmann
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Corrensstraße 48, 48149, Münster, Germany
| | - Leon Kemper
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Corrensstraße 48, 48149, Münster, Germany
| | - Daniel Amiteye
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Corrensstraße 48, 48149, Münster, Germany
| | - Stefan Cord-Landwehr
- Institute of Plant Biology and Biotechnology, University of Münster, Schlossplatz 8, 48143, Münster, Germany
| | - Corinna Kehrenberg
- Institute of Veterinary Food Science, Justus Liebig University Giessen, Frankfurter Straße 92, 35392, Giessen, Germany
| | - Bruno M Moerschbacher
- Institute of Plant Biology and Biotechnology, University of Münster, Schlossplatz 8, 48143, Münster, Germany
| | - Andreas Hensel
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Corrensstraße 48, 48149, Münster, Germany.
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Ago R, Tahara YO, Yamaguchi H, Saito M, Ito W, Yamasaki K, Kasai T, Okamoto S, Chikada T, Oshima T, Osaka I, Miyata M, Niki H, Shiomi D. Relationship between the Rod complex and peptidoglycan structure in Escherichia coli. Microbiologyopen 2023; 12:e1385. [PMID: 37877652 PMCID: PMC10561026 DOI: 10.1002/mbo3.1385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/26/2023] Open
Abstract
Peptidoglycan for elongation in Escherichia coli is synthesized by the Rod complex, which includes RodZ. Although various mutant strains of the Rod complex have been isolated, the relationship between the activity of the Rod complex and the overall physical and chemical structures of the peptidoglycan have not been reported. We constructed a RodZ mutant, termed RMR, and analyzed the growth rate, morphology, and other characteristics of cells producing the Rod complexes containing RMR. The growth and morphology of RMR cells were abnormal, and we isolated suppressor mutants from RMR cells. Most of the suppressor mutations were found in components of the Rod complex, suggesting that these suppressor mutations increase the integrity and/or the activity of the Rod complex. We purified peptidoglycan from wild-type, RMR, and suppressor mutant cells and observed their structures in detail. We found that the peptidoglycan purified from RMR cells had many large holes and different compositions of muropeptides from those of WT cells. The Rod complex may be a determinant not only for the whole shape of peptidoglycan but also for its highly dense structure to support the mechanical strength of the cell wall.
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Affiliation(s)
- Risa Ago
- Department of Life Science, College of ScienceRikkyo UniversityTokyoJapan
| | - Yuhei O. Tahara
- Graduate School of ScienceOsaka Metropolitan UniversityOsakaJapan
- The OMU Advanced Research Center for Natural Science and TechnologyOsaka Metropolitan UniversityOsakaJapan
| | - Honoka Yamaguchi
- Department of Life Science, College of ScienceRikkyo UniversityTokyoJapan
| | - Motoya Saito
- Department of Biotechnology, Faculty of EngineeringToyama Prefectural UniversityImizuToyamaJapan
| | - Wakana Ito
- Department of Biotechnology, Faculty of EngineeringToyama Prefectural UniversityImizuToyamaJapan
| | - Kaito Yamasaki
- Department of Pharmaceutical Engineering, Faculty of EngineeringToyama Prefectural UniversityImizuToyamaJapan
| | - Taishi Kasai
- Department of Life Science, College of ScienceRikkyo UniversityTokyoJapan
| | - Sho Okamoto
- Microbial Physiology Laboratory, Department of Gene Function and PhenomicsNational Institute of GeneticsMishimaShizuokaJapan
| | - Taiki Chikada
- Department of Life Science, College of ScienceRikkyo UniversityTokyoJapan
| | - Taku Oshima
- Department of Biotechnology, Faculty of EngineeringToyama Prefectural UniversityImizuToyamaJapan
| | - Issey Osaka
- Department of Pharmaceutical Engineering, Faculty of EngineeringToyama Prefectural UniversityImizuToyamaJapan
| | - Makoto Miyata
- Graduate School of ScienceOsaka Metropolitan UniversityOsakaJapan
- The OMU Advanced Research Center for Natural Science and TechnologyOsaka Metropolitan UniversityOsakaJapan
| | - Hironori Niki
- Microbial Physiology Laboratory, Department of Gene Function and PhenomicsNational Institute of GeneticsMishimaShizuokaJapan
- Department of GeneticsThe Graduate University for Advanced Studies, SOKENDAIMishimaShizuokaJapan
| | - Daisuke Shiomi
- Department of Life Science, College of ScienceRikkyo UniversityTokyoJapan
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