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  1. Article: Mycobacterial Adhesion: From Hydrophobic to Receptor-Ligand Interactions

    Viljoen, Albertus / Dufrêne, Yves F. / Nigou, Jérôme

    Microorganisms. 2022 Feb. 16, v. 10, no. 2

    2022  

    Abstract: Adhesion is crucial for the infective lifestyles of bacterial pathogens. Adhesion to non-living surfaces, other microbial cells, and components of the biofilm extracellular matrix are crucial for biofilm formation and integrity, plus adherence to host ... ...

    Abstract Adhesion is crucial for the infective lifestyles of bacterial pathogens. Adhesion to non-living surfaces, other microbial cells, and components of the biofilm extracellular matrix are crucial for biofilm formation and integrity, plus adherence to host factors constitutes a first step leading to an infection. Adhesion is, therefore, at the core of pathogens’ ability to contaminate, transmit, establish residency within a host, and cause an infection. Several mycobacterial species cause diseases in humans and animals with diverse clinical manifestations. Mycobacterium tuberculosis, which enters through the respiratory tract, first adheres to alveolar macrophages and epithelial cells leading up to transmigration across the alveolar epithelium and containment within granulomas. Later, when dissemination occurs, the bacilli need to adhere to extracellular matrix components to infect extrapulmonary sites. Mycobacteria causing zoonotic infections and emerging nontuberculous mycobacterial pathogens follow divergent routes of infection that probably require adapted adhesion mechanisms. New evidence also points to the occurrence of mycobacterial biofilms during infection, emphasizing a need to better understand the adhesive factors required for their formation. Herein, we review the literature on tuberculous and nontuberculous mycobacterial adhesion to living and non-living surfaces, to themselves, to host cells, and to components of the extracellular matrix.
    Keywords Mycobacterium tuberculosis ; adhesion ; biofilm ; epithelium ; extracellular matrix ; granuloma ; hydrophobicity ; ligands ; macrophages ; respiratory system
    Language English
    Dates of publication 2022-0216
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms10020454
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Mycobacterial Adhesion: From Hydrophobic to Receptor-Ligand Interactions.

    Viljoen, Albertus / Dufrêne, Yves F / Nigou, Jérôme

    Microorganisms

    2022  Volume 10, Issue 2

    Abstract: Adhesion is crucial for the infective lifestyles of bacterial pathogens. Adhesion to non-living surfaces, other microbial cells, and components of the biofilm extracellular matrix are crucial for biofilm formation and integrity, plus adherence to host ... ...

    Abstract Adhesion is crucial for the infective lifestyles of bacterial pathogens. Adhesion to non-living surfaces, other microbial cells, and components of the biofilm extracellular matrix are crucial for biofilm formation and integrity, plus adherence to host factors constitutes a first step leading to an infection. Adhesion is, therefore, at the core of pathogens' ability to contaminate, transmit, establish residency within a host, and cause an infection. Several mycobacterial species cause diseases in humans and animals with diverse clinical manifestations.
    Language English
    Publishing date 2022-02-16
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms10020454
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Asymmetric Total Synthesis and Structural Revision of DAT

    Lin, Zonghao / Kaniraj, Jeya Prathap / Holzheimer, Mira / Nigou, Jérôme / Gilleron, Martine / Hekelaar, Johan / Minnaard, Adriaan J

    Angewandte Chemie (International ed. in English)

    2024  Volume 63, Issue 19, Page(s) e202318582

    Abstract: ... ...

    Abstract DAT
    MeSH term(s) Mycobacterium tuberculosis/immunology ; Mycobacterium tuberculosis/chemistry ; Glycolipids/chemistry ; Glycolipids/chemical synthesis ; Glycolipids/immunology ; Stereoisomerism ; Molecular Structure
    Chemical Substances Glycolipids
    Language English
    Publishing date 2024-04-03
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202318582
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Nanoscale clustering of mycobacterial ligands and DC-SIGN host receptors are key determinants for pathogen recognition.

    Viljoen, Albertus / Vercellone, Alain / Chimen, Myriam / Gaibelet, Gérald / Mazères, Serge / Nigou, Jérôme / Dufrêne, Yves F

    Science advances

    2023  Volume 9, Issue 20, Page(s) eadf9498

    Abstract: The bacterial ... ...

    Abstract The bacterial pathogen
    MeSH term(s) Ligands ; Receptors, Cell Surface/metabolism ; Lectins, C-Type/metabolism ; Mycobacterium tuberculosis/metabolism
    Chemical Substances DC-specific ICAM-3 grabbing nonintegrin ; Ligands ; Receptors, Cell Surface ; Lectins, C-Type
    Language English
    Publishing date 2023-05-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adf9498
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Development of a novel target-based cell assay, reporter of the activity of Mycobacterium tuberculosis protein-O-mannosyltransferase.

    Géraud, Nicolas / Falcou, Camille / Parra, Julien / Froment, Carine / Rengel, David / Burlet-Schiltz, Odile / Marcoux, Julien / Nigou, Jérôme / Rivière, Michel / Fabre, Emeline

    Glycobiology

    2024  Volume 33, Issue 12, Page(s) 1139–1154

    Abstract: The Protein-O-mannosyltransferase is crucial for the virulence of Mycobacterium tuberculosis, the etiological agent of tuberculosis. This enzyme, called MtPMT (Rv1002c), is responsible for the post-translational O-mannosylation of mycobacterial proteins. ...

    Abstract The Protein-O-mannosyltransferase is crucial for the virulence of Mycobacterium tuberculosis, the etiological agent of tuberculosis. This enzyme, called MtPMT (Rv1002c), is responsible for the post-translational O-mannosylation of mycobacterial proteins. It catalyzes the transfer of a single mannose residue from a polyprenol phospho-mannosyl lipidic donor to the hydroxyl groups of selected Ser/Thr residues in acceptor proteins during their translocation across the membrane. Previously, we provided evidence that the loss of MtPMT activity causes the absence of mannoproteins in Mycobacterium tuberculosis, severely impacting its intracellular growth, as well as a strong attenuation of its pathogenicity in immunocompromised mice. Therefore, it is of interest to develop specific inhibitors of this enzyme to better understand mycobacterial infectious diseases. Here we report the development of a "target-based" phenotypic assay for this enzyme, assessing its O-mannosyltransferase activity in bacteria, in the non-pathogenic Mycobacterium smegmatis strain. Robustness of the quantitative contribution of this assay was evaluated by intact protein mass spectrometry, using a panel of control strains, overexpressing the MtPMT gene, carrying different key point-mutations. Then, screening of a limited library of 30 compounds rationally chosen allowed us to identify 2 compounds containing pyrrole analogous rings, as significant inhibitors of MtPMT activity, affecting neither the growth of the mycobacterium nor its secretion of mannoproteins. These molecular cores could therefore serve as scaffold for the design of new pharmaceutical agents that could improve treatment of mycobacterial diseases. We report here the implementation of a miniaturized phenotypic activity assay for a glycosyltransferase of the C superfamily.
    MeSH term(s) Animals ; Mice ; Mycobacterium tuberculosis ; Mannosyltransferases/genetics ; Mannosyltransferases/metabolism ; Glycosylation ; Protein Processing, Post-Translational ; Mycobacterium smegmatis/genetics ; Mycobacterium smegmatis/metabolism
    Chemical Substances Mannosyltransferases (EC 2.4.1.-)
    Language English
    Publishing date 2024-02-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 1067689-2
    ISSN 1460-2423 ; 0959-6658
    ISSN (online) 1460-2423
    ISSN 0959-6658
    DOI 10.1093/glycob/cwad072
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Impact of Methylthioxylose Substituents on the Biological Activities of Lipomannan and Lipoarabinomannan in

    Palčeková, Zuzana / De, Kavita / Angala, Shiva Kumar / Gilleron, Martine / Zuberogoitia, Sophie / Gouxette, Lucie / Soto-Ojeda, Maritza / Gonzalez-Juarrero, Mercedes / Obregón-Henao, Andrés / Nigou, Jérôme / Wheat, William H / Jackson, Mary

    ACS infectious diseases

    2024  Volume 10, Issue 4, Page(s) 1379–1390

    Abstract: Two lipoglycans, lipomannan (LM) and lipoarabinomannan (LAM), play various, albeit incompletely defined, roles in the interactions of mycobacteria with the host. Growing evidence points to the modification of LM and LAM with discrete covalent ... ...

    Abstract Two lipoglycans, lipomannan (LM) and lipoarabinomannan (LAM), play various, albeit incompletely defined, roles in the interactions of mycobacteria with the host. Growing evidence points to the modification of LM and LAM with discrete covalent substituents as a strategy used by these bacteria to modulate their biological activities. One such substituent, originally identified in
    MeSH term(s) Humans ; Lipopolysaccharides ; Mycobacterium tuberculosis ; Tuberculosis/microbiology
    Chemical Substances lipoarabinomannan ; lipomannan ; Lipopolysaccharides
    Language English
    Publishing date 2024-03-21
    Publishing country United States
    Document type Journal Article
    ISSN 2373-8227
    ISSN (online) 2373-8227
    DOI 10.1021/acsinfecdis.4c00079
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Editorial: Mycobacterial Glycolipids-Role in Immunomodulation and Targets for Vaccine Development.

    Källenius, Gunilla / Nigou, Jérôme / Cooper, Andrea / Correia-Neves, Margarida

    Frontiers in immunology

    2020  Volume 11, Page(s) 603900

    MeSH term(s) Animals ; Bacterial Vaccines/therapeutic use ; Glycolipids/immunology ; Glycolipids/metabolism ; Humans ; Mycobacterium/immunology ; Mycobacterium/metabolism ; Mycobacterium Infections/immunology ; Mycobacterium Infections/microbiology ; Mycobacterium Infections/prevention & control ; Mycobacterium Infections/transmission
    Chemical Substances Bacterial Vaccines ; Glycolipids
    Language English
    Publishing date 2020-10-08
    Publishing country Switzerland
    Document type Editorial ; Introductory Journal Article
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2020.603900
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Lipid and Lipoarabinomannan Isolation and Characterization.

    Lanéelle, Marie-Antoinette / Spina, Lucie / Nigou, Jérôme / Lemassu, Anne / Daffé, Mamadou

    Methods in molecular biology (Clifton, N.J.)

    2021  Volume 2314, Page(s) 109–150

    Abstract: The very high content of structurally diverse and biologically active lipids of exotic structures is the hallmark of Mycobacteria. As such the lipid composition is commonly used to characterize mycobacterial strains at the species and type-species levels. ...

    Abstract The very high content of structurally diverse and biologically active lipids of exotic structures is the hallmark of Mycobacteria. As such the lipid composition is commonly used to characterize mycobacterial strains at the species and type-species levels. The present chapter describes the methods that allow the purification of the most commonly isolated biologically active lipids and those used for analyzing extractable lipids and their constituents, cell wall-linked mycolic acids (MA), and lipoarabinomannan (LAM). These involve various chromatographic techniques and analytical procedures necessary for structural and metabolic studies of mycobacterial lipids. In addition, as the use of physical methods has brought important overhang on chemical structures of the very-long-chain MA, which typify mycobacteria, NMR and mass spectrometry data of these specific fatty acids are included.
    MeSH term(s) Cell Wall/metabolism ; Lipids/analysis ; Lipids/isolation & purification ; Lipopolysaccharides/analysis ; Lipopolysaccharides/isolation & purification ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Mycobacterium/metabolism
    Chemical Substances Lipids ; Lipopolysaccharides ; lipoarabinomannan
    Language English
    Publishing date 2021-07-06
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-1460-0_4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Glycopeptidolipid glycosylation controls surface properties and pathogenicity in Mycobacterium abscessus.

    Daher, Wassim / Leclercq, Louis-David / Johansen, Matt D / Hamela, Claire / Karam, Jona / Trivelli, Xavier / Nigou, Jérôme / Guérardel, Yann / Kremer, Laurent

    Cell chemical biology

    2022  Volume 29, Issue 5, Page(s) 910–924.e7

    Abstract: Mycobacterium abscessus is an emerging and difficult-to-manage mycobacterial species that exhibits smooth (S) or rough (R) morphotypes. Disruption of glycopeptidolipid (GPL) production results in transition from S to R and severe lung disease. A ... ...

    Abstract Mycobacterium abscessus is an emerging and difficult-to-manage mycobacterial species that exhibits smooth (S) or rough (R) morphotypes. Disruption of glycopeptidolipid (GPL) production results in transition from S to R and severe lung disease. A structure-activity relationship study was undertaken to decipher the role of GPL glycosylation in morphotype transition and pathogenesis. Deletion of gtf3 uncovered the prominent role of the extra rhamnose in enhancing mannose receptor-mediated internalization of M. abscessus by macrophages. In contrast, the absence of the 6-deoxy-talose and the first rhamnose in mutants lacking gtf1 and gtf2, respectively, affected M abscessus phagocytosis but also resulted in the S-to-R transition. Strikingly, gtf1 and gtf2 mutants displayed a strong propensity to form cords and abscesses in zebrafish, leading to robust and lethal infection. Together, these results underscore the importance and differential contribution of GPL monosaccharides in promoting virulence and infection outcomes.
    MeSH term(s) Animals ; Glycosylation ; Mycobacterium abscessus ; Rhamnose ; Surface Properties ; Virulence ; Zebrafish
    Chemical Substances Rhamnose (QN34XC755A)
    Language English
    Publishing date 2022-03-30
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2451-9448
    ISSN (online) 2451-9448
    DOI 10.1016/j.chembiol.2022.03.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: The Lipid Virulence Factors of

    Bah, Aïcha / Sanicas, Merlin / Nigou, Jérôme / Guilhot, Christophe / Astarie-Dequeker, Catherine / Vergne, Isabelle

    Cells

    2020  Volume 9, Issue 3

    Abstract: Autophagy is an important innate immune defense mechanism that ... ...

    Abstract Autophagy is an important innate immune defense mechanism that controls
    MeSH term(s) Autophagy/immunology ; Bacterial Proteins/drug effects ; Bacterial Proteins/metabolism ; Humans ; Lipids/pharmacology ; Macrophages/drug effects ; Macrophages/metabolism ; Macrophages/microbiology ; Mycobacterium tuberculosis/drug effects ; Mycobacterium tuberculosis/metabolism ; Mycobacterium tuberculosis/pathogenicity ; Phagocytosis/drug effects ; Phagocytosis/immunology ; Phagosomes/metabolism ; Phagosomes/microbiology ; Virulence Factors/metabolism
    Chemical Substances Bacterial Proteins ; Lipids ; Virulence Factors ; phthiocerol dimycocerosate (63642-22-8)
    Language English
    Publishing date 2020-03-09
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells9030666
    Database MEDical Literature Analysis and Retrieval System OnLINE

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