1
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Páez-Watson T, Tomás-Martínez S, de Wit R, Keisham S, Tateno H, van Loosdrecht MCM, Lin Y. Sweet Secrets: Exploring Novel Glycans and Glycoconjugates in the Extracellular Polymeric Substances of " Candidatus Accumulibacter". ACS ES&T WATER 2024; 4:3391-3399. [PMID: 39144681 PMCID: PMC11320575 DOI: 10.1021/acsestwater.4c00247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 06/20/2024] [Accepted: 06/21/2024] [Indexed: 08/16/2024]
Abstract
Biological wastewater treatment relies on microorganisms that grow as flocs, biofilms, or granules for efficient separation of biomass from cleaned water. This biofilm structure emerges from the interactions between microbes that produce, and are embedded in, extracellular polymeric substances (EPS). The true composition and structure of the EPS responsible for dense biofilm formation are still obscure. We conducted a bottom-up approach utilizing advanced glycomic techniques to explore the glycan diversity in the EPS from a highly enriched "Candidatus Accumulibacter" granular sludge. Rare novel sugar monomers such as N-Acetylquinovosamine (QuiNAc) and 2-O-Methylrhamnose (2-OMe-Rha) were identified to be present in the EPS of both enrichments. Further, a high diversity in the glycoprotein structures of said EPS was identified by means of lectin based microarrays. We explored the genetic potential of "Ca. Accumulibacter" high quality metagenome assembled genomes (MAGs) to showcase the shortcoming of top-down bioinformatics based approaches at predicting EPS composition and structure, especially when dealing with glycans and glycoconjugates. This work suggests that more bottom-up research is necessary to understand the composition and complex structure of EPS in biofilms since genome based inference cannot directly predict glycan structures and glycoconjugate diversity.
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Affiliation(s)
- Timothy Páez-Watson
- Department
of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
| | - Sergio Tomás-Martínez
- Department
of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
| | - Roeland de Wit
- Department
of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
| | - Sunanda Keisham
- Cellular
and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology
(AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Hiroaki Tateno
- Cellular
and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology
(AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
| | - Mark C. M. van Loosdrecht
- Department
of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
| | - Yuemei Lin
- Department
of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
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2
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Konyshev IV, Byvalov AA. The bacterial flagellum as an object for optical trapping. Biophys Rev 2024; 16:403-415. [PMID: 39309130 PMCID: PMC11415335 DOI: 10.1007/s12551-024-01212-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 07/16/2024] [Indexed: 09/25/2024] Open
Abstract
This letter considers the possibility of using the optical trap to study the structure and function of the microbial flagellum. The structure of the flagellum of a typical gram-negative bacterium is described in brief. A standard mathematical model based on the principle of superposition is used to describe the movement of an ellipsoidal microbial cell in a liquid medium. The basic principles of optical trapping based on the combined action of the light pressure and the gradient force are briefly clarified. Several problems related to thermal damage of living microscopic objects when the latter gets to the focus of a laser beam are shortly discussed. It is shown that the probability of cell damage depends nonlinearly on the wavelength of laser radiation. Finally, the model systems that would make it possible to study flagella of the free bacteria and the ones anchored or tethered on the surface of a solid material are discussed in detail.
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Affiliation(s)
- Ilya V. Konyshev
- Institute of Physiology of the Federal Research Centre, Komi Science Centre, Ural Branch of the Russian Academy of Sciences, Syktyvkar, 167982 Russia
- Vyatka State University, Kirov, 610000 Russia
| | - Andrey A. Byvalov
- Institute of Physiology of the Federal Research Centre, Komi Science Centre, Ural Branch of the Russian Academy of Sciences, Syktyvkar, 167982 Russia
- Vyatka State University, Kirov, 610000 Russia
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3
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Zhou Y, Li K, Adelson DL. An unmet need for pharmacology: Treatments for radiation-induced gastrointestinal mucositis. Biomed Pharmacother 2024; 175:116767. [PMID: 38781863 DOI: 10.1016/j.biopha.2024.116767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/07/2024] [Accepted: 05/17/2024] [Indexed: 05/25/2024] Open
Abstract
Gastrointestinal mucositis (GIM) continues to be a significant issue in the management of abdominal cancer radiation treatments and chemotherapy, causing significant patient discomfort and therapy interruption or even cessation. This review will first focus on radiotherapy induced GIM, providing an understanding of its clinical landscape. Subsequently, the aetiology of GIM will be reviewed, highlighting diverse contributing factors. The cellular and tissue damage and associated molecular responses in GIM will be summarised in the context of the underlying complex biological processes. Finally, available drugs and pharmaceutical therapies will be evaluated, underscoring their insufficiency, and highlighting the need for further research and innovation. This review will emphasize the urgent need for improved pharmacologic therapeutics for GIM, which is a key research priority in oncology.
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Affiliation(s)
- Yan Zhou
- Department of Molecular and Biomedical Science, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia; Zhendong Australia China Centre for Molecular Chinese Medicine, The University of Adelaide, Adelaide, South Australia 5005, Australia.
| | - Kun Li
- Beijing Zhendong Guangming Pharmaceutical Research Institute, Beijing 100120, China.
| | - David L Adelson
- Department of Molecular and Biomedical Science, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia; Zhendong Australia China Centre for Molecular Chinese Medicine, The University of Adelaide, Adelaide, South Australia 5005, Australia.
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4
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Bustos NA, Ribbeck K, Wagner CE. The role of mucosal barriers in disease progression and transmission. Adv Drug Deliv Rev 2023; 200:115008. [PMID: 37442240 DOI: 10.1016/j.addr.2023.115008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 05/22/2023] [Accepted: 07/10/2023] [Indexed: 07/15/2023]
Abstract
Mucus is a biological hydrogel that coats and protects all non-keratinized wet epithelial surfaces. Mucins, the primary structural components of mucus, are critical components of the gel layer that protect against invading pathogens. For communicable diseases, pathogen-mucin interactions contribute to the pathogen's fate and the potential for disease progression in-host, as well as the potential for onward transmission. We begin by reviewing in-host mucus filtering mechanisms, including size filtering and interaction filtering, which regulate the permeability of mucus barriers to all molecules including pathogens. Next, we discuss the role of mucins in communicable diseases at the point of transmission (i.e. how the encapsulation of pathogens in emitted mucosal droplets externally to hosts may modulate pathogen infectivity and viability). Overall, mucosal barriers modulate both host susceptibility as well as the dynamics of population-level disease transmission. The study of mucins and their use in models and experimental systems are therefore crucial for understanding the mechanistic biophysical principles underlying disease transmission and the early stages of host infection.
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Affiliation(s)
- Nicole A Bustos
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Katharina Ribbeck
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Caroline E Wagner
- Department of Bioengineering, McGill University, Montreal, Quebec, Canada.
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5
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Guan H, Sun Y, Hou W, Zhao W, Wang P, Zhao S, Zhao X, Wang D. Infection behavior of Listeria monocytogenes on iceberg lettuce (Lactuca sativa var. capitata). Food Res Int 2023; 165:112487. [PMID: 36869448 DOI: 10.1016/j.foodres.2023.112487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 10/31/2022] [Accepted: 01/13/2023] [Indexed: 01/19/2023]
Abstract
Iceberg lettuce among leafy vegetables is susceptible to contamination with foodborne pathogens, posing a risk of food microbial safety. Listeria monocytogenes (L. monocytogenes) is a highly lethal pathogen that can survive and proliferate on leafy vegetables. In this paper, the contamination stage, attachment site, internalization pathway, proliferation process, extracellular substance secretion and virulence factors expression of L. monocytogenes on iceberg lettuce were researched. Results showed that the contamination stage of L. monocytogenes on iceberg lettuce was 0-20 min, the proliferation stage was after 20 min. The attachment tissues were stomata and winkles. The internalization distance of L. monocytogenes in the midrib was farther than that in the leaf blade. They enhanced the movement ability of cells by up-regulating the expression of flaA and motA genes, and enhanced the adhesion ability of cells by up-regulating the expression of actA and inla genes, which was beneficial to the proliferation. During proliferation, cells gradually secreted extracellular substances to promote the biofilm formation on iceberg lettuce. The formation of biofilms experienced: individual bacteria, cell aggregation and biofilm maturation. Biofilms were more likely to form on the leaf blade of iceberg lettuce.
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Affiliation(s)
- Hongyang Guan
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China; College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yeting Sun
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Wanfu Hou
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Wenting Zhao
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Pan Wang
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Shuang Zhao
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Xiaoyan Zhao
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China
| | - Dan Wang
- Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing Key Laboratory of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
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6
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Byvalov AA, Belozerov VS, Ananchenko BA, Konyshev IV. Specific and Nonspecific Interactions of Yersinia pseudotuberculosis Lipopolysaccharide with Monoclonal Antibodies Assessed by Atomic Force Microscopy. Biophysics (Nagoya-shi) 2022. [DOI: 10.1134/s0006350922060033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
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7
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Zhang B, Zhong Y, Dong D, Zheng Z, Hu J. Gut microbial utilization of xylan and its implication in gut homeostasis and metabolic response. Carbohydr Polym 2022; 286:119271. [DOI: 10.1016/j.carbpol.2022.119271] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/16/2022] [Accepted: 02/16/2022] [Indexed: 12/16/2022]
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8
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Almahayni K, Spiekermann M, Fiore A, Yu G, Pedram K, Möckl L. Small molecule inhibitors of mammalian glycosylation. Matrix Biol Plus 2022; 16:100108. [PMID: 36467541 PMCID: PMC9713294 DOI: 10.1016/j.mbplus.2022.100108] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 02/10/2022] [Accepted: 03/10/2022] [Indexed: 01/06/2023] Open
Abstract
Glycans are one of the fundamental biopolymers encountered in living systems. Compared to polynucleotide and polypeptide biosynthesis, polysaccharide biosynthesis is a uniquely combinatorial process to which interdependent enzymes with seemingly broad specificities contribute. The resulting intracellular cell surface, and secreted glycans play key roles in health and disease, from embryogenesis to cancer progression. The study and modulation of glycans in cell and organismal biology is aided by small molecule inhibitors of the enzymes involved in glycan biosynthesis. In this review, we survey the arsenal of currently available inhibitors, focusing on agents which have been independently validated in diverse systems. We highlight the utility of these inhibitors and drawbacks to their use, emphasizing the need for innovation for basic research as well as for therapeutic applications.
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Affiliation(s)
- Karim Almahayni
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
| | - Malte Spiekermann
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
| | - Antonio Fiore
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA
| | - Guoqiang Yu
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA
| | - Kayvon Pedram
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA,Corresponding authors.
| | - Leonhard Möckl
- Max Planck Institute for the Science of Light, 91058 Erlangen, Germany,Corresponding authors.
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9
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Ben Ami Pilo H, Khan Khilji S, Lühle J, Biskup K, Levy Gal B, Rosenhek Goldian I, Alfandari D, Revach O, Kiper E, Morandi MI, Rotkopf R, Porat Z, Blanchard V, Seeberger PH, Regev‐Rudzki N, Moscovitz O. Sialylated N-glycans mediate monocyte uptake of extracellular vesicles secreted from Plasmodium falciparum-infected red blood cells. JOURNAL OF EXTRACELLULAR BIOLOGY 2022; 1:e33. [PMID: 38938665 PMCID: PMC11080922 DOI: 10.1002/jex2.33] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/17/2022] [Accepted: 01/26/2022] [Indexed: 06/29/2024]
Abstract
Glycoconjugates on extracellular vesicles (EVs) play a vital role in internalization and mediate interaction as well as regulation of the host immune system by viruses, bacteria, and parasites. During their intraerythrocytic life-cycle stages, malaria parasites, Plasmodium falciparum (Pf) mediate the secretion of EVs by infected red blood cells (RBCs) that carry a diverse range of parasitic and host-derived molecules. These molecules facilitate parasite-parasite and parasite-host interactions to ensure parasite survival. To date, the number of identified Pf genes associated with glycan synthesis and the repertoire of expressed glycoconjugates is relatively low. Moreover, the role of Pf glycans in pathogenesis is mostly unclear and poorly understood. As a result, the expression of glycoconjugates on Pf-derived EVs or their involvement in the parasite life-cycle has yet to be reported. Herein, we show that EVs secreted by Pf-infected RBCs carry significantly higher sialylated complex N-glycans than EVs derived from healthy RBCs. Furthermore, we reveal that EV uptake by host monocytes depends on N-glycoproteins and demonstrate that terminal sialic acid on the N-glycans is essential for uptake by human monocytes. Our results provide the first evidence that Pf exploits host sialylated N-glycans to mediate EV uptake by the human immune system cells.
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Affiliation(s)
- Hila Ben Ami Pilo
- Faculty of BiochemistryDepartment of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Sana Khan Khilji
- Department of Biomolecular SystemsMax‐Planck‐Institute of Colloids and InterfacesBerlinGermany
- Institute of Chemistry and BiochemistryFreie Universität BerlinBerlinGermany
| | - Jost Lühle
- Department of Biomolecular SystemsMax‐Planck‐Institute of Colloids and InterfacesBerlinGermany
- Institute of Chemistry and BiochemistryFreie Universität BerlinBerlinGermany
| | - Karina Biskup
- Institute of Laboratory MedicineClinical Chemistry and PathobiochemistryCharite University Medicine BerlinBerlinGermany
| | - Bar Levy Gal
- Flow Cytometry Unit, Life Sciences Core FacilitiesWeizmann Institute of ScienceRehovotIsrael
| | | | - Daniel Alfandari
- Faculty of BiochemistryDepartment of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Or‐Yam Revach
- Faculty of BiochemistryDepartment of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Edo Kiper
- Faculty of BiochemistryDepartment of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Mattia I. Morandi
- Faculty of BiochemistryDepartment of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Ron Rotkopf
- Bioinformatics Unit, Life Sciences Core FacilitiesWeizmann Institute of ScienceRehovotIsrael
| | - Ziv Porat
- Flow Cytometry Unit, Life Sciences Core FacilitiesWeizmann Institute of ScienceRehovotIsrael
| | - Véronique Blanchard
- Institute of Laboratory MedicineClinical Chemistry and PathobiochemistryCharite University Medicine BerlinBerlinGermany
| | - Peter H. Seeberger
- Department of Biomolecular SystemsMax‐Planck‐Institute of Colloids and InterfacesBerlinGermany
- Institute of Chemistry and BiochemistryFreie Universität BerlinBerlinGermany
| | - Neta Regev‐Rudzki
- Faculty of BiochemistryDepartment of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Oren Moscovitz
- Department of Biomolecular SystemsMax‐Planck‐Institute of Colloids and InterfacesBerlinGermany
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10
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Matos R, Sousa HS, Nogueiro J, Magalhães A, Reis CA, Carneiro F, Amorim I, Haesebrouck F, Gärtner F. Helicobacter species binding to the human gastric mucosa. Helicobacter 2022; 27:e12867. [PMID: 34967491 DOI: 10.1111/hel.12867] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/30/2021] [Accepted: 12/07/2021] [Indexed: 02/06/2023]
Abstract
Helicobacter pylori infects half of the world population, being associated with several gastric disorders, such as chronic gastritis and gastric carcinoma. The Helicobacter genus also includes other gastric helicobacters, such as H. heilmannii¸ H. ailurogastricus, H. suis, H. felis, H. bizzozeronii, and H. salomonis. These gastric helicobacters colonize both the human and animal stomach. The prevalence of gastric non-Helicobacter pylori Helicobacter (NHPH) species in humans has been described as low, and the in vitro binding to the human gastric mucosa was never assessed. Herein, human gastric tissue sections were used for the evaluation of the tissue glycophenotype and for the binding of gastric NHPH strains belonging to different species. Histopathological evaluation showed that 37.5% of the patients enrolled in our cohort presented chronic gastritis, while the presence of neutrophil or eosinophilic activity (chronic active gastritis) was observed in 62.5% of the patients. The secretor phenotype was observed in 68.8% of the individuals, based on the expression of Lewis B antigen and binding of the UleX lectin. The in vitro binding assay showed that all the NHPH strains evaluated were able to bind, albeit in low frequency, to the human gastric mucosa. The H. heilmannii, H. bizzozeronii, and H. salomonis strains displayed the highest binding ability both to the gastric superficial epithelium and to the deep glands. Interestingly, we observed binding of NHPH to the gastric mucosa of individuals with severe chronic inflammation and intestinal metaplasia, suggesting that NHPH binding may not be restricted to the healthy gastric mucosa or slight chronic gastritis. Furthermore, the in vitro binding of NHPH strains was observed both in secretor and non-secretor individuals in a similar frequency. In conclusion, this study is the first report of the in vitro binding ability of gastric NHPH species to the human gastric mucosa. The results suggest that other glycans, besides the Lewis antigens, could be involved in the bacterial adhesion mechanism; however, the molecular intervenients remain unknown.
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Affiliation(s)
- Rita Matos
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Hugo Santos Sousa
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal
| | - Jorge Nogueiro
- Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal.,Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - Ana Magalhães
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Celso A Reis
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal.,Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - Fátima Carneiro
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal.,Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
| | - Irina Amorim
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Freddy Haesebrouck
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Belgium
| | - Fátima Gärtner
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, Porto, Portugal.,Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
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11
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Abootaleb M, Mohammadi Bandari N, Arbab Soleimani N. Interference of Lactiplantibacillus plantarum with Pseudomonas aeruginosa on the infected burns in Wistar rats. J Burn Care Res 2021; 43:951-956. [PMID: 34893853 DOI: 10.1093/jbcr/irab229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Burns are the most prevalent type of trauma in the world, and they have a high fatality rate. For cutaneous wound healing, modern and natural therapies, particularly probiotic supplements, have lately been considered. The goal of this study was to see how Lactiplantibacillus plantarum affected wound healing as well as the antibacterial activity of probiotic lactobacilli against Pseudomonas aeruginosa. The glass slide method was used to assess anti-adhesion activity, and the HPLC method was used to quantify anti-adhesion chemicals in cell-free supernatant (CFS). MDR P. aeruginosa was administered subcutaneously directly on the burn after induction of second-degree wounds. Three groups of animals were created. Every day, the supernatants were sprayed for therapy, and the wound healing was monitored. Lactobacilli bacteria had good anti-adhesion effects on P. aeruginosa, according to our findings, and HPLC research revealed that their inhibitory effect could be attributable to four main organic acids: lactic acid, acetic acid, citric acid, and succinic acid. When the effect of treatments on fibroblastic cells was examined, it was discovered that the group treated with L. plantarum supernatants had the most fibroblastic cells when compared to the non-treated group. Furthermore, the bacteria increased the number of fibroblastic cells, re-epithelialization in the wound area, and the thickness of the epidermis and dermis layers. Lactobacilli bacteria's antimicrobial activity against MDR P. aeruginosa was determined by prevents infection. These findings revealed that L. plantarum can treat a P. aeruginosa infection in a second-degree burn and can significantly reduce inflammation.
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12
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Demir-Yilmaz I, Guiraud P, Formosa-Dague C. The contribution of Atomic Force Microscopy (AFM) in microalgae studies: A review. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Parreira P, Martins MCL. The biophysics of bacterial infections: Adhesion events in the light of force spectroscopy. Cell Surf 2021; 7:100048. [PMID: 33665520 PMCID: PMC7898176 DOI: 10.1016/j.tcsw.2021.100048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 08/10/2020] [Accepted: 12/03/2020] [Indexed: 02/08/2023] Open
Abstract
Bacterial infections are the most eminent public health challenge of the 21st century. The primary step leading to infection is bacterial adhesion to the surface of host cells or medical devices, which is mediated by a multitude of molecular interactions. At the interface of life sciences and physics, last years advances in atomic force microscopy (AFM)-based force spectroscopy techniques have made possible to measure the forces driving bacteria-cell and bacteria-materials interactions on a single molecule/cell basis (single molecule/cell force spectroscopy). Among the bacteria-(bio)materials surface interactions, the life-threatening infections associated to medical devices involving Staphylococcus aureus and Escherichia coli are the most eminent. On the other hand, Pseudomonas aeruginosa binding to the pulmonary and urinary tract or the Helicobacter pylori binding to the gastric mucosa, are classical examples of bacteria-host cell interactions that end in serious infections. As we approach the end of the antibiotic era, acquisition of a deeper knowledge of the fundamental forces involved in bacteria - host cells/(bio)materials surface adhesion is crucial for the identification of new ligand-binding events and its assessment as novel targets for alternative anti-infective therapies. This article aims to highlight the potential of AFM-based force spectroscopy for new targeted therapies development against bacterial infections in which adhesion plays a pivotal role and does not aim to be an extensive overview on the AFM technical capabilities and theory of single molecule force spectroscopy.
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Affiliation(s)
- Paula Parreira
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Portugal
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal
| | - M. Cristina L. Martins
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Portugal
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal
- ICBAS – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Portugal
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14
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Argüeso P, Woodward AM, AbuSamra DB. The Epithelial Cell Glycocalyx in Ocular Surface Infection. Front Immunol 2021; 12:729260. [PMID: 34497615 PMCID: PMC8419333 DOI: 10.3389/fimmu.2021.729260] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/09/2021] [Indexed: 12/30/2022] Open
Abstract
The glycocalyx is the main component of the transcellular barrier located at the interface between the ocular surface epithelia and the external environment. This barrier extends up to 500 nm from the plasma membrane and projects into the tear fluid bathing the surface of the eye. Under homeostatic conditions, defense molecules in the glycocalyx, such as transmembrane mucins, resist infection. However, many pathogenic microorganisms have evolved to exploit components of the glycocalyx in order to gain access to epithelial cells and consequently exert deleterious effects. This manuscript reviews the implications of the ocular surface epithelial glycocalyx to bacterial, viral, fungal and parasitic infection. Moreover, it presents some ongoing controversies surrounding the functional relevance of the epithelial glycocalyx to ocular infectious disease.
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Affiliation(s)
- Pablo Argüeso
- Department of Ophthalmology, Schepens Eye Research Institute of Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, United States
| | - Ashley M Woodward
- Department of Ophthalmology, Schepens Eye Research Institute of Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, United States
| | - Dina B AbuSamra
- Department of Ophthalmology, Schepens Eye Research Institute of Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, United States
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15
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Dunker K, de la Torre Canny SG, Nordgård CT, Dague E, Formosa-Dague C, Bakke I, Sletmoen M. Elucidating bacterial adhesion to mucosal surface by an original AFM approach. BMC Microbiol 2021; 21:244. [PMID: 34488629 PMCID: PMC8422614 DOI: 10.1186/s12866-021-02303-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 08/27/2021] [Indexed: 11/10/2022] Open
Abstract
Background Fish skin represents an ancient vertebrate mucosal surface, sharing characteristics with other mucosal surfaces including those of the intestine. The skin mucosa is continuously exposed to microbes in the surrounding water and is therefore important in the first line defense against environmental pathogens by preventing bacteria from accessing the underlying surfaces. Understanding the microbe-host interactions at the fish skin mucosa is highly relevant in order to understand and control infection, commensalism, colonization, persistence, infection, and disease. Here we investigate the interactions between the pathogenic bacteria Aeromonas salmonicida (A. salmonicida) and Yersinia ruckeri (Y. ruckeri), respectively, and the skin mucosal surface of Atlantic salmon fry using AFM force spectroscopy. Results The results obtained revealed that when retracting probes functionalized with bacteria from surfaces coated with immobilized mucins, isolated from salmon mucosal surfaces, rupture events reflecting the disruption of adhesive interactions were observed, with rupture strengths centered around 200 pN. However, when retracting probes functionalized with bacteria from the intact mucosal surface of salmon fish fry no adhesive interactions could be detected. Furthermore, rheological measurements revealed a near fluid-like behavior for the fish fry skin mucus. Taken together, the experimental data indicate that the adhesion between the mucin molecules within the mucous layer may be significantly weaker than the interaction between the bacteria and the mucin molecules. The bacteria, immobilized on the AFM probe, do bind to individual mucins in the mucosal layer, but are released from the near fluid mucus with little resistance upon retraction of the AFM probe, to which they are immobilized. Conclusion The data provided in the current paper reveal that A. salmonicida and Y. ruckeri do bind to the immobilized mucins. However, when retracting the bacteria from intact mucosal surfaces, no adhesive interactions are detected. These observations suggest a mechanism underlying the protective function of the mucosal surface based on the clearing of potential threats by adhering them to loosely attached mucus that is subsequently released from the fish skin.
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Affiliation(s)
- Karen Dunker
- Department of Biotechnology, NTNU Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Sol Gomez de la Torre Canny
- Department of Biotechnology, NTNU Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Catherine Taylor Nordgård
- Department of Biotechnology, NTNU Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Etienne Dague
- LAAS-CNRS, Université de Toulouse, CNRS, 31400, Toulouse, France
| | | | - Ingrid Bakke
- Department of Biotechnology, NTNU Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Marit Sletmoen
- Department of Biotechnology, NTNU Norwegian University of Science and Technology, NO-7491, Trondheim, Norway.
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16
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Konyshev I, Byvalov A. Model systems for optical trapping: the physical basis and biological applications. Biophys Rev 2021; 13:515-529. [PMID: 34471436 DOI: 10.1007/s12551-021-00823-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/05/2021] [Indexed: 11/30/2022] Open
Abstract
The micromechanical methods, among which optical trapping and atomic force microscopy have a special place, are widespread currently in biology to study molecular interactions between different biological objects. Optical trapping is reported to be quite applicable to study the mechanical properties of surface structures onto bacterial (pili and flagella) and eukaryotic (filopodia) cells. The review briefly summarizes the physical basis of optical trapping, as well as the principles of calculating the van der Waals, electrostatic, and donor-acceptor forces when two microparticles or a microparticle and a flat surface are used. Three main types of model systems (abiotic, biotic, and mixed) used in trapping experiments are described, and the peculiarities of manipulation with living (bacteria, fungal spores, etc.) and non-spherical objects (e.g., rod-shaped bacteria) are summarized.
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Affiliation(s)
- Ilya Konyshev
- Institute of Physiology of Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Komi Republic, 167982 Syktyvkar, Russian Federation.,Vyatka State University, 36 Moskovskaya str, 610000 Kirov, Russian Federation
| | - Andrey Byvalov
- Institute of Physiology of Коmi Science Centre of the Ural Branch of the Russian Academy of Sciences, FRC Komi SC UB RAS, Komi Republic, 167982 Syktyvkar, Russian Federation.,Vyatka State University, 36 Moskovskaya str, 610000 Kirov, Russian Federation
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17
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Matos R, Amorim I, Magalhães A, Haesebrouck F, Gärtner F, Reis CA. Adhesion of Helicobacter Species to the Human Gastric Mucosa: A Deep Look Into Glycans Role. Front Mol Biosci 2021; 8:656439. [PMID: 34026832 PMCID: PMC8138122 DOI: 10.3389/fmolb.2021.656439] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 04/22/2021] [Indexed: 12/15/2022] Open
Abstract
Helicobacter species infections may be associated with the development of gastric disorders, such as gastritis, peptic ulcers, intestinal metaplasia, dysplasia and gastric carcinoma. Binding of these bacteria to the gastric mucosa occurs through the recognition of specific glycan receptors expressed by the host epithelial cells. This review addresses the state of the art knowledge on these host glycan structures and the bacterial adhesins involved in Helicobacter spp. adhesion to gastric mucosa colonization. Glycans are expressed on every cell surface and they are crucial for several biological processes, including protein folding, cell signaling and recognition, and host-pathogen interactions. Helicobacter pylori is the most predominant gastric Helicobacter species in humans. The adhesion of this bacterium to glycan epitopes present on the gastric epithelial surface is a crucial step for a successful colonization. Major adhesins essential for colonization and infection are the blood-group antigen-binding adhesin (BabA) which mediates the interaction with fucosylated H-type 1 and Lewis B glycans, and the sialic acid-binding adhesin (SabA) which recognizes the sialyl-Lewis A and X glycan antigens. Since not every H. pylori strain expresses functional BabA or SabA adhesins, other bacterial proteins are most probably also involved in this adhesion process, including LabA (LacdiNAc-binding adhesin), which binds to the LacdiNAc motif on MUC5AC mucin. Besides H. pylori, several other gastric non-Helicobacter pylori Helicobacters (NHPH), mainly associated with pigs (H. suis) and pets (H. felis, H. bizzozeronii, H. salomonis, and H. heilmannii), may also colonize the human stomach and cause gastric disease, including gastritis, peptic ulcers and mucosa-associated lymphoid tissue (MALT) lymphoma. These NHPH lack homologous to the major known adhesins involved in colonization of the human stomach. In humans, NHPH infection rate is much lower than in the natural hosts. Differences in the glycosylation profile between gastric human and animal mucins acting as glycan receptors for NHPH-associated adhesins, may be involved. The identification and characterization of the key molecules involved in the adhesion of gastric Helicobacter species to the gastric mucosa is important to understand the colonization and infection strategies displayed by different members of this genus.
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Affiliation(s)
- Rita Matos
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Irina Amorim
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
| | - Ana Magalhães
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Fátima Gärtner
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
| | - Celso A. Reis
- Instituto de Investigação e Inovação Em Saúde (i3S), Universidade do Porto, Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS), Porto, Portugal
- Faculdade de Medicina da Universidade do Porto (FMUP), Porto, Portugal
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18
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Galeev A, Suwandi A, Cepic A, Basu M, Baines JF, Grassl GA. The role of the blood group-related glycosyltransferases FUT2 and B4GALNT2 in susceptibility to infectious disease. Int J Med Microbiol 2021; 311:151487. [PMID: 33662872 DOI: 10.1016/j.ijmm.2021.151487] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/01/2021] [Accepted: 02/23/2021] [Indexed: 12/12/2022] Open
Abstract
The glycosylation profile of the gastrointestinal tract is an important factor mediating host-microbe interactions. Variation in these glycan structures is often mediated by blood group-related glycosyltransferases, and can lead to wide-ranging differences in susceptibility to both infectious- as well as chronic disease. In this review, we focus on the interplay between host glycosylation, the intestinal microbiota and susceptibility to gastrointestinal pathogens based on studies of two exemplary blood group-related glycosyltransferases that are conserved between mice and humans, namely FUT2 and B4GALNT2. We highlight that differences in susceptibility can arise due to both changes in direct interactions, such as bacterial adhesion, as well as indirect effects mediated by the intestinal microbiota. Although a large body of experimental work exists for direct interactions between host and pathogen, determining the more complex and variable mechanisms underlying three-way interactions involving the intestinal microbiota will be the subject of much-needed future research.
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Affiliation(s)
- Alibek Galeev
- Max Planck Institute for Evolutionary Biology, Plön, Germany and Institute for Experimental Medicine, Kiel University, Kiel, Germany
| | - Abdulhadi Suwandi
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School and German Center for Infection Research (DZIF), Hannover, Germany
| | - Aleksa Cepic
- Max Planck Institute for Evolutionary Biology, Plön, Germany and Institute for Experimental Medicine, Kiel University, Kiel, Germany
| | - Meghna Basu
- Max Planck Institute for Evolutionary Biology, Plön, Germany and Institute for Experimental Medicine, Kiel University, Kiel, Germany
| | - John F Baines
- Max Planck Institute for Evolutionary Biology, Plön, Germany and Institute for Experimental Medicine, Kiel University, Kiel, Germany.
| | - Guntram A Grassl
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School and German Center for Infection Research (DZIF), Hannover, Germany.
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19
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Abu Quba AA, Schaumann GE, Karagulyan M, Diehl D. Quality control of direct cell–mineral adhesion measurements in air and liquid using inverse AFM imaging. RSC Adv 2021; 11:5384-5392. [PMID: 35423094 PMCID: PMC8694684 DOI: 10.1039/d1ra00110h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 01/22/2021] [Indexed: 12/03/2022] Open
Abstract
The study of interaction forces between biological and non-living systems requires in-house production of probes modified with, e.g., bacterial cells or with minerals, in order to map irregularly shaped natural surfaces. In order to avoid artifacts, it is essential to control the functionality of the modified probes. Current methods for this purpose require removing the modified probe from the liquid-cell, inserting it into another device and/or have a too low resolution to detect local changes within the interacting areas. Therefore, we present a fast and cost-effective method that overcomes the above mentioned problems by the inverse AFM imaging principle. First, the 3-D shape of a fresh sharp AFM tip is modeled by measuring the shape of a standard rough pattern and post blind tip reconstruction analysis. The so calibrated characterizer tip was extracted and upside-down fixed rigidly on a disc together with the sample. Before and after the cell–mineral interaction, the modified probe is then inversely imaged by the fixed characterizer controlling changes in finest 3-D details of the modified probe. The characterization of probes modified with kaolinite and P. fluorescens cells and their interactions with R. erythropolis and montmorillonite samples show that the method allows a fast precise investigation of tip modifications before and after cell–mineral interactions in air and liquid such that artifacts in adhesion between cell and mineral at the single-cell level can be excluded. Setup for a reliable cell-mineral interaction at the single-cell level, (a) study of the mineral by a sharp tip, (b) study of the bacterial modified probe by a characterizer, (c) cell-mineral interaction, (d) subsequent check of the modified probe.![]()
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Affiliation(s)
- Abd Alaziz Abu Quba
- Environmental and Soil Chemistry Group
- iES Institute for Environmental Sciences
- University of Koblenz-Landau
- 76829 Landau
- Germany
| | - Gabriele E. Schaumann
- Environmental and Soil Chemistry Group
- iES Institute for Environmental Sciences
- University of Koblenz-Landau
- 76829 Landau
- Germany
| | - Mariam Karagulyan
- Department of Environmental Biotechnology
- Helmholtz Centre for Environmental Research – UFZ
- Leipzig
- Germany
| | - Doerte Diehl
- Environmental and Soil Chemistry Group
- iES Institute for Environmental Sciences
- University of Koblenz-Landau
- 76829 Landau
- Germany
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20
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Li C, Ma D, Zhou H, Zhang M, An L, Wang Y, Wu C. Effects of different doses lipopolysaccharides on the mucosal barrier in mouse intestine. Res Vet Sci 2020; 133:75-84. [PMID: 32947071 DOI: 10.1016/j.rvsc.2020.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/26/2020] [Accepted: 09/07/2020] [Indexed: 12/22/2022]
Abstract
Lipopolysaccharide (LPS), an important component in the outer membrane of the cell wall of Gram-negative bacteria, can induce a systemic inflammatory response and play an important role in bacterial infection and disease evolution. The thick layer of mucus covering the small intestinal villus acts primarily to the first barrier from damage by toxic substances. We aimed to study the effects of LPS on the intestinal mucus layer barrier. The results showed that the thickness of the mucus layer was significantly increased by a low dose of LPS. Further, LPS can cross this barrier into the blood, put the body in a state of chronic low-grade inflammation, and activate the body's immune response. However, after a long-term high dose of LPS exposure, a large number of lysosomes in goblet cells caused a loss of function, and mucus layer thickness was significantly decreased. A large amount of LPS stuck to the mucus, leading to normal LPS and inflammatory cytokines level of plasma. The intestinal tissue morphology was damaged, and many immune cells died through necrosis in the intestine. Collectively, the function of the goblet cell was normal, a low dose of LPS cannot be stuck to the mucus layer. However, a high dose of LPS stuck to the mucus when goblet cells caused a loss of function, which can be directly linked to the severity of the immunosuppression in the body.
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Affiliation(s)
- Chao Li
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - DeXue Ma
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hongchao Zhou
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mingming Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Liyan An
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yi Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chenchen Wu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.
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21
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Gordesli-Duatepe FP, Park BJ, Kawas LH, Abu-Lail NI. Atomic Force Microscopy Investigation of the Contributions of Listeria monocytogenes Cell-Wall Biomacromolecules to Their Adherence and Mechanics. J Phys Chem B 2020; 124:5872-5883. [PMID: 32544332 DOI: 10.1021/acs.jpcb.0c04025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, the contributions of the pathogenic Listeria monocytogenes cell-wall biomacromolecules to the bacterial mechanics and adhesion to a model inert surface of silicon nitride in water were investigated by atomic force microscopy. Chemical ethylenediaminetetraacetic acid (EDTA) and biological enzymatic trypsin treatments of cells were performed to partially or totally remove the bacterial cell-wall proteins and carbohydrates. Removal of 48.2% proteins and 29.2% of carbohydrates from the cell-wall of the bacterium by the EDTA treatment resulted in a significant decrease in the length of the bacterial cell-wall biomacromolecules and an increase in the rigidity of the bacterial cells as predicted from fitting a model of steric repulsion to the force-distance approach data and classic Hertz model to the indentation-force data, respectively. In comparison, removal of almost all the cell-wall proteins (99.5% removal) and 8.6% of cell-wall carbohydrates by the trypsin treatment resulted in an increase in the elasticity of the bacterial cells, an increase in the extension of the cell-wall biomacromolecules, and a significant decrease in their apparent grafting densities. In addition, adhesion strength of native-untreated L. monocytogenes to silicon nitride in water decreased by 30% on average after the EDTA treatment and further decreased by 60% on average after the trypsin treatment, showing a positive correlation with the% removal of cell-wall proteins by the EDTA and trypsin treatments, respectively.
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Affiliation(s)
- F Pinar Gordesli-Duatepe
- Department of Genetics and Bioengineering, Faculty of Engineering, Izmir University of Economics, 35330 Izmir, Turkey
| | - Bong J Park
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Leen H Kawas
- Department of Veterinary and Comparative Anatomy, Pharmacology, and Physiology, Washington State University Pullman, Washington 99164-6520, United States
| | - Nehal I Abu-Lail
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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22
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Möckl L. The Emerging Role of the Mammalian Glycocalyx in Functional Membrane Organization and Immune System Regulation. Front Cell Dev Biol 2020; 8:253. [PMID: 32351961 PMCID: PMC7174505 DOI: 10.3389/fcell.2020.00253] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 03/25/2020] [Indexed: 12/17/2022] Open
Abstract
All cells in the human body are covered by a dense layer of sugars and the proteins and lipids to which they are attached, collectively termed the "glycocalyx." For decades, the organization of the glycocalyx and its interplay with the cellular state have remained enigmatic. This changed in recent years. Latest research has shown that the glycocalyx is an organelle of vital significance, actively involved in and functionally relevant for various cellular processes, that can be directly targeted in therapeutic contexts. This review gives a brief introduction into glycocalyx biology and describes the specific challenges glycocalyx research faces. Then, the traditional view of the role of the glycocalyx is discussed before several recent breakthroughs in glycocalyx research are surveyed. These results exemplify a currently unfolding bigger picture about the role of the glycocalyx as a fundamental cellular agent.
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Affiliation(s)
- Leonhard Möckl
- Department of Chemistry, Stanford University, Stanford, CA, United States
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23
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Josenhans C, Müthing J, Elling L, Bartfeld S, Schmidt H. How bacterial pathogens of the gastrointestinal tract use the mucosal glyco-code to harness mucus and microbiota: New ways to study an ancient bag of tricks. Int J Med Microbiol 2020; 310:151392. [DOI: 10.1016/j.ijmm.2020.151392] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/28/2019] [Accepted: 12/06/2019] [Indexed: 12/13/2022] Open
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24
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Hall AR, Blakeman JT, Eissa AM, Chapman P, Morales-García AL, Stennett L, Martin O, Giraud E, Dockrell DH, Cameron NR, Wiese M, Yakob L, Rogers ME, Geoghegan M. Glycan–glycan interactions determine Leishmania attachment to the midgut of permissive sand fly vectors. Chem Sci 2020. [DOI: 10.1039/d0sc03298k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Force spectroscopy was used to measure the adhesion of Leishmania to synthetic mimics of galectins on the sand fly midgut.
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25
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Öhlinger K, Kolesnik T, Meindl C, Gallé B, Absenger-Novak M, Kolb-Lenz D, Fröhlich E. Air-liquid interface culture changes surface properties of A549 cells. Toxicol In Vitro 2019; 60:369-382. [PMID: 31233786 DOI: 10.1016/j.tiv.2019.06.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 06/15/2019] [Accepted: 06/19/2019] [Indexed: 01/08/2023]
Abstract
A549 cells are common models in the assessment of respiratory cytotoxicity. To provide physiologically more representative exposure conditions and increase the differentiation state, respiratory cells, for instance Calu-3 bronchial epithelial cells, are cultured at an air-liquid interface (ALI). There are indications that A549 cells also change their phenotype upon culture in ALI. The influence of culture in two variations of transwell cultures compared to conventional culture in plastic wells on the phenotype of A549 cells was studied. Cells were characterized by morphology, proliferation and transepithelial electrical resistance, whole genome transcription analysis, Western blot and immunocytochemical detection of pro-surfactant proteins. Furthermore, lipid staining, surface morphology, cell elasticity, surface tension and reaction to quartz particles were performed. Relatively small changes were noted in the expression of differentiation markers for alveolar cells but A549 cells cultured in ALI showed marked differences in lipid staining and surface morphology, surface tension and cytotoxicity of quartz particles. Data show that changes in physiological reactions of A549 cells in ALI culture were rather caused by change of surface properties than by increased expression of surfactant proteins.
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Affiliation(s)
- Kristin Öhlinger
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria
| | - Tatjana Kolesnik
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria
| | - Claudia Meindl
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria
| | - Birgit Gallé
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria
| | - Markus Absenger-Novak
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria
| | - Dagmar Kolb-Lenz
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria
| | - Eleonore Fröhlich
- Center for Medical Research, Medical University of Graz, Stiftingtalstr. 24, 8010 Graz, Austria.
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26
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Abstract
The mucus layer covering the gastrointestinal tract plays a critical role in maintaining a homeostatic relationship with our gut microbiota. [...].
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Affiliation(s)
- Nathalie Juge
- Quadram Institute Bioscience, The Gut Microbes and Health Institute Strategic Programme, Norwich Research Park, Norwich NR4 7UA, UK.
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