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Lagune M, Kremer L, Herrmann JL. Mycobacterium abscessus, a complex of three fast-growing subspecies sharing virulence traits with slow-growing mycobacteria. Clin Microbiol Infect 2024; 30:726-731. [PMID: 37797823 DOI: 10.1016/j.cmi.2023.08.036] [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: 05/15/2023] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 10/07/2023]
Abstract
BACKGROUND Mycobacterium abscessus belongs to the largest group of mycobacteria, the rapid-growing saprophytic mycobacteria, and is one of the most difficult-to-treat opportunistic pathogen. Several features pertain to the high adaptability of M. abscessus to the host. These include the capacity to survive and persist within amoebae, to transition from a smooth to a rough morphotype that occurs during the course of the disease and to express of a wide array of virulence factors. OBJECTIVES The main objective of this narrative review consists to report major assets of M. abscessus that contribute to the virulence of these rapid-growing saprophytic mycobacteria. Strikingly, many of these determinants, whether they are from a mycobacterial origin or acquired by horizontal gene transfer, are known virulence factors found in slow-growing and strict pathogens for humans and animals. SOURCES In the light of recent published work in the field we attempted to highlight major features characterizing M. abscessus pathogenicity and to explain why this led to the emergence of this mycobacterial species in patients with cystic fibrosis. CONTENT M. abscessus genome plasticity, the smooth-to-rough transition, and the expression of a panel of enzymes associated with virulence in other bacteria are key players in M. abscessus virulence. In addition, the very large repertoire of lipid transporters, known as mycobacterial membrane protein large and small (MmpL and MmpS respectively), deeply influences the pathogenicity of M. abscessus, as exemplified here for some of them. IMPLICATIONS All these traits largely contribute to make M. abscessus a unique mycobacterium regarding to its pathophysiological processes, ranging from the early colonization steps to the establishment of severe and chronic pulmonary diseases.
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Affiliation(s)
- Marion Lagune
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Laurent Kremer
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, Montpellier, France; INSERM, IRIM, Montpellier, France
| | - Jean-Louis Herrmann
- Université Paris-Saclay, UVSQ, INSERM, U1173 Infection et Inflammation, Montigny-le-Bretonneux, France; Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Ile-de-France Ouest, GHU Paris-Saclay, Hôpital Raymond Poincaré, Garches, France.
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2
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Palucci I, Delogu G. Alternative therapies against Mycobacterium abscessus infections. Clin Microbiol Infect 2024; 30:732-737. [PMID: 37820951 DOI: 10.1016/j.cmi.2023.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/28/2023] [Accepted: 10/01/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND Mycobacterium abscessus (Mab) is considered as the most pathogenic rapid-growing mycobacteria in humans, causing pulmonary and extra-pulmonary diseases, especially in patients with cystic fibrosis. Mab shows intrinsic and acquired resistance to many drugs, leaving limited treatment options that lead to a generally poor prognosis. The standard therapeutic regimen last for more than 6 months and consists of a drug cocktail that ideally includes a macrolide and amikacin. Yet, toxicity and efficacy are suboptimal due also to the high toxicity. There is a need to introduce innovative and out-of-the-box approaches to improve treatments. OBJECTIVES In this narrative review, we summarize the recent research on the alternative strategies proposed and discuss the importance of using appropriate experimental assays to assess their activity. SOURCES Included articles were identified by searching PubMed and MEDLINE until June 2023. The search terms were 'Mycobacterium abscessus', 'antimicrobial', and 'alternative therapies'. Additional relevant references were obtained from articles retrieved from the primary search. CONTENT Therapies against Mab including host directed therapies, repurposed drugs, phage therapy, anti-virulence strategies, essential oils, and inhalation therapies. IMPLICATIONS Alternative treatments may represent a valid tool to cope the burden of antimicrobial resistance in Mab-caused diseases.
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Affiliation(s)
- Ivana Palucci
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy; Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie - Sezione di Microbiologia, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Giovanni Delogu
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie - Sezione di Microbiologia, Università Cattolica del Sacro Cuore, Rome, Italy; Mater Olbia Hospital, Olbia, Italy.
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Huang Q, Duan C, Ma H, Nong C, Zheng Q, Zhou J, Zhao N, Mou X, Liu T, Zou S, Yang N, Tong A, Qin W, Bao R. Structural and functional characterization of itaconyl-CoA hydratase and citramalyl-CoA lyase involved in itaconate metabolism of Pseudomonas aeruginosa. Structure 2024:S0969-2126(24)00130-8. [PMID: 38677288 DOI: 10.1016/j.str.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/23/2024] [Accepted: 04/02/2024] [Indexed: 04/29/2024]
Abstract
Itaconate is a key anti-inflammatory/antibacterial metabolite in pathogen-macrophage interactions that induces adaptive changes in Pseudomonas aeruginosa-exposed airways. However, the impact and mechanisms underlying itaconate metabolism remain unclear. Our study reveals that itaconate significantly upregulates the expression of pyoverdine in P. aeruginosa and enhances its tolerance to tobramycin. Notably, the enzymes responsible for efficient itaconate metabolism, PaIch and PaCcl, play crucial roles in both utilizing itaconate and clearing its toxic metabolic intermediates. By using protein crystallography and molecular dynamics simulations analyses, we have elucidated the unique catalytic center and substrate-binding pocket of PaIch, which contribute to its highly efficient catalysis. Meanwhile, analysis of PaCcl has revealed how interactions between domains regulate the conformational changes of the active sites and binding pockets, influencing the catalytic process. Overall, our research uncovers the significance and mechanisms of PaIch and PaCcl in the efficient metabolism of itaconate by P. aeruginosa.
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Affiliation(s)
- Qin Huang
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Chenxi Duan
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Haichuan Ma
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Cheng Nong
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Qianqian Zheng
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jun Zhou
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ninglin Zhao
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xingyu Mou
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Tonggen Liu
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Shuang Zou
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ningchuan Yang
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Aiping Tong
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wenming Qin
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, CAS, Shanghai, China.
| | - Rui Bao
- Center of Infectious Diseases, Division of Infectious Diseases in State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
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4
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De K, Belardinelli JM, Pandurangan AP, Ehianeta T, Lian E, Palčeková Z, Lam H, Gonzalez-Juarrero M, Bryant JM, Blundell TL, Parkhill J, Floto RA, Lowary TL, Wheat WH, Jackson M. Lipoarabinomannan modification as a source of phenotypic heterogeneity in host-adapted Mycobacterium abscessus isolates. Proc Natl Acad Sci U S A 2024; 121:e2403206121. [PMID: 38630725 PMCID: PMC11046677 DOI: 10.1073/pnas.2403206121] [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: 02/20/2024] [Accepted: 03/20/2024] [Indexed: 04/19/2024] Open
Abstract
Mycobacterium abscessus is increasingly recognized as the causative agent of chronic pulmonary infections in humans. One of the genes found to be under strong evolutionary pressure during adaptation of M. abscessus to the human lung is embC which encodes an arabinosyltransferase required for the biosynthesis of the cell envelope lipoglycan, lipoarabinomannan (LAM). To assess the impact of patient-derived embC mutations on the physiology and virulence of M. abscessus, mutations were introduced in the isogenic background of M. abscessus ATCC 19977 and the resulting strains probed for phenotypic changes in a variety of in vitro and host cell-based assays relevant to infection. We show that patient-derived mutational variations in EmbC result in an unexpectedly large number of changes in the physiology of M. abscessus, and its interactions with innate immune cells. Not only did the mutants produce previously unknown forms of LAM with a truncated arabinan domain and 3-linked oligomannoside chains, they also displayed significantly altered cording, sliding motility, and biofilm-forming capacities. The mutants further differed from wild-type M. abscessus in their ability to replicate and induce inflammatory responses in human monocyte-derived macrophages and epithelial cells. The fact that different embC mutations were associated with distinct physiologic and pathogenic outcomes indicates that structural alterations in LAM caused by nonsynonymous nucleotide polymorphisms in embC may be a rapid, one-step, way for M. abscessus to generate broad-spectrum diversity beneficial to survival within the heterogeneous and constantly evolving environment of the infected human airway.
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Affiliation(s)
- Kavita De
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Juan M. Belardinelli
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Arun Prasad Pandurangan
- Victor Phillip Dahdaleh Heart and Lung Research Institute, Biomedical Campus, Trumpington, CambridgeCB2 OBB, United Kingdom
| | - Teddy Ehianeta
- Institute of Biological Chemistry, Academia Sinica, Nangang, Taipei11529, Taiwan
| | - Elena Lian
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Zuzana Palčeková
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Ha Lam
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Mercedes Gonzalez-Juarrero
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Josephine M. Bryant
- Parasites and Microbes Programme, Wellcome Sanger Institute, HinxtonCB10 1SA, United Kingdom
| | - Tom L. Blundell
- Victor Phillip Dahdaleh Heart and Lung Research Institute, Biomedical Campus, Trumpington, CambridgeCB2 OBB, United Kingdom
| | - Julian Parkhill
- Department of Veterinary Medicine, University of Cambridge, CambridgeCB3 0ES, United Kingdom
| | - R. Andres Floto
- Victor Phillip Dahdaleh Heart and Lung Research Institute, Biomedical Campus, Trumpington, CambridgeCB2 OBB, United Kingdom
- Molecular Immunity Unit, Department of Medicine, Medical Research Council-Laboratory of Molecular Biology, University of Cambridge, Trumpington, CambridgeCB2 0QH, United Kingdom
- University of Cambridge Centre for AI in Medicine, Cambridge CB3 0WA, United Kingdom
- Cambridge Centre for Lung Infection, Royal Papworth Hospital, CambridgeCB2 0AY, United Kingdom
| | - Todd L. Lowary
- Institute of Biological Chemistry, Academia Sinica, Nangang, Taipei11529, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, Taipei106, Taiwan
| | - William H. Wheat
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
| | - Mary Jackson
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO80523-1682
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5
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Pramanik A, Datta S. Structural and functional insights of itaconyl-CoA hydratase from Pseudomonas aeruginosa highlight a novel N-terminal hotdog fold. FEBS Lett 2024. [PMID: 38575551 DOI: 10.1002/1873-3468.14867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 02/29/2024] [Accepted: 03/05/2024] [Indexed: 04/06/2024]
Abstract
Itaconyl-CoA hydratase in Pseudomonas aeruginosa (PaIch) converts itaconyl-CoA to (S)-citramalyl-CoA upon addition of a water molecule, a part of an itaconate catabolic pathway in virulent organisms required for their survival in humans host cells. Crystal structure analysis of PaIch showed that a unique N-terminal hotdog fold containing a 4-residue short helical segment α3-, named as an "eaten sausage", followed by a flexible loop region slipped away from the conserved β-sheet scaffold, whereas the C-terminal hotdog fold is similar to all MaoC. A conserved hydratase motif with catalytic residues provides mechanistic insights into catalysis, and existence of a longer substrate binding tunnel may suggest the binding of longer CoA derivatives.
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Affiliation(s)
- Atanu Pramanik
- Department of Structural Biology and Bio-informatics, CSIR-Indian Institute of Chemical Biology (CSIR-IICB), Kolkata, India
| | - Saumen Datta
- Department of Structural Biology and Bio-informatics, CSIR-Indian Institute of Chemical Biology (CSIR-IICB), Kolkata, India
- Biological Sciences, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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6
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Johansen MD, Spaink HP, Oehlers SH, Kremer L. Modeling nontuberculous mycobacterial infections in zebrafish. Trends Microbiol 2023:S0966-842X(23)00329-3. [PMID: 38135617 DOI: 10.1016/j.tim.2023.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/24/2023]
Abstract
The incidence of infections due to nontuberculous mycobacteria (NTM) has increased rapidly in recent years, surpassing tuberculosis in developed countries. Due to inherent antimicrobial resistance, NTM infections are particularly difficult to treat with low cure rates. There is an urgent need to understand NTM pathogenesis and to develop novel therapeutic approaches for the treatment of NTM diseases. Zebrafish have emerged as an excellent animal model due to genetic amenability and optical transparency during embryonic development, allowing spatiotemporal visualization of host-pathogen interactions. Furthermore, adult zebrafish possess fully functional innate and adaptive immunity and recapitulate important pathophysiological hallmarks of mycobacterial infection. Here, we report recent breakthroughs in understanding the hallmarks of NTM infections using the zebrafish model.
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Affiliation(s)
- Matt D Johansen
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, Faculty of Science, School of Life Sciences, Sydney, NSW, Australia
| | - Herman P Spaink
- Institute of Biology, Leiden University, Leiden, The Netherlands
| | - Stefan H Oehlers
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Laurent Kremer
- Centre National de la Recherche Scientifique, UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 Route de Mende, 34293, Montpellier, France; INSERM, IRIM, 34293 Montpellier, France.
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7
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Mishra R, Hannebelle M, Patil VP, Dubois A, Garcia-Mouton C, Kirsch GM, Jan M, Sharma K, Guex N, Sordet-Dessimoz J, Perez-Gil J, Prakash M, Knott GW, Dhar N, McKinney JD, Thacker VV. Mechanopathology of biofilm-like Mycobacterium tuberculosis cords. Cell 2023; 186:5135-5150.e28. [PMID: 37865090 PMCID: PMC10642369 DOI: 10.1016/j.cell.2023.09.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/26/2023] [Accepted: 09/14/2023] [Indexed: 10/23/2023]
Abstract
Mycobacterium tuberculosis (Mtb) cultured axenically without detergent forms biofilm-like cords, a clinical identifier of virulence. In lung-on-chip (LoC) and mouse models, cords in alveolar cells contribute to suppression of innate immune signaling via nuclear compression. Thereafter, extracellular cords cause contact-dependent phagocyte death but grow intercellularly between epithelial cells. The absence of these mechanopathological mechanisms explains the greater proportion of alveolar lesions with increased immune infiltration and dissemination defects in cording-deficient Mtb infections. Compression of Mtb lipid monolayers induces a phase transition that enables mechanical energy storage. Agent-based simulations demonstrate that the increased energy storage capacity is sufficient for the formation of cords that maintain structural integrity despite mechanical perturbation. Bacteria in cords remain translationally active despite antibiotic exposure and regrow rapidly upon cessation of treatment. This study provides a conceptual framework for the biophysics and function in tuberculosis infection and therapy of cord architectures independent of mechanisms ascribed to single bacteria.
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Affiliation(s)
- Richa Mishra
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Melanie Hannebelle
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland; Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Vishal P Patil
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Anaëlle Dubois
- BioElectron Microscopy Facility, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | | | - Gabriela M Kirsch
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Maxime Jan
- Bioinformatics Competence Centre, University of Lausanne, 1015 Lausanne, Switzerland; Bioinformatics Competence Centre, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Kunal Sharma
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Nicolas Guex
- Bioinformatics Competence Centre, University of Lausanne, 1015 Lausanne, Switzerland; Bioinformatics Competence Centre, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Jessica Sordet-Dessimoz
- Histology Core Facility, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Jesus Perez-Gil
- Department of Biochemistry, University Complutense Madrid, 28040 Madrid, Spain
| | - Manu Prakash
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Graham W Knott
- BioElectron Microscopy Facility, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Neeraj Dhar
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - John D McKinney
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Vivek V Thacker
- Global Health Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
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Veigyabati Devi M, Singh AK. Delineation of transcriptional regulators involve in biofilm formation cycle of Mycobacterium abscessus. Gene 2023; 882:147644. [PMID: 37479094 DOI: 10.1016/j.gene.2023.147644] [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: 06/10/2023] [Revised: 07/01/2023] [Accepted: 07/12/2023] [Indexed: 07/23/2023]
Abstract
Mycobacterium abscessus is an intrinsically and acquired multidrug resistant (MDR) intracellular pathogen with biofilm formation capability and limited option for treatment. Biofilm is the major characteristic that leads to failure and prolong treatment, intensifies treatment cost and increases mortality/morbidity rate. However, the biofilm formation regulations of M. abscessus remain largely unexplored. In this study, we identify the putative/hypothetical transcriptional regulator (TR) of M. abscessus that are involved in biofilm formation. This study includes fifty TRs belonging to thirteen different families viz., AraC, ArsR, AsnC, CarD, CdaR, GntR, IclR, LysR, MarR, PadR, PrrA, TetR and WhiB, including TRs of unknown family. The promoter of these putative TRs were fused individually with GFP and analyzed their expression using CLSM in planktonic phase and early, mid and mature stages of biofilm formation phase, which overall termed as biofilm formation cycle. Further, qRT-PCR was carried out for selected TRs to analyze their differential expressions. This study found thirteen numbers of TR belonging to TetR family, five TRs belonging to MarR family, four TRs of unannotated TR family, two AraC TRs, two LysR, two GntR, two AsnC, one each of ArsR family, CarD family, IclR family, PadR family, PrrA family and WhiB family selected for this study are involved in biofilm formation cycle. Our study characterized the TRs with respect to their role in biofilm formation for the first time in M. abscessus and also found that their biofilm formation is regulated by diverse TR families.
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Affiliation(s)
- Moirangthem Veigyabati Devi
- Biological Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anil Kumar Singh
- Biological Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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Alcaraz M, Edwards TE, Kremer L. New therapeutic strategies for Mycobacterium abscessus pulmonary diseases - untapping the mycolic acid pathway. Expert Rev Anti Infect Ther 2023; 21:813-829. [PMID: 37314394 PMCID: PMC10529309 DOI: 10.1080/14787210.2023.2224563] [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: 02/28/2023] [Accepted: 06/08/2023] [Indexed: 06/15/2023]
Abstract
INTRODUCTION Treatment options against Mycobacterium abscessus infections are very limited. New compounds are needed to cure M. abscessus pulmonary diseases. While the mycolic acid biosynthetic pathway has been largely exploited for the treatment of tuberculosis, this metabolic process has been overlooked in M. abscessus, although it offers many potential drug targets for the treatment of this opportunistic pathogen. AREAS COVERED Herein, the authors review the role of the MmpL3 membrane protein and the enoyl-ACP reductase InhA involved in the transport and synthesis of mycolic acids, respectively. They discuss their importance as two major vulnerable drug targets in M. abscessus and report the activity of MmpL3 and InhA inhibitors. In particular, they focus on NITD-916, a direct InhA inhibitor against M. abscessus, particularly warranted in the context of multidrug resistance. EXPERT OPINION There is an increasing body of evidence validating the mycolic acid pathway as an attractive drug target to be further exploited for M. abscessus lung disease treatments. The NITD-916 studies provide a proof-of-concept that direct inhibitors of InhA are efficient in vitro, in macrophages and in zebrafish. Future work is now required to improve the activity and pharmacological properties of these inhibitors and their evaluation in pre-clinical models.
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Affiliation(s)
- Matthéo Alcaraz
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 route de Mende, 34293, Montpellier, France
| | - Thomas E. Edwards
- UCB BioSciences, Bainbridge Island, WA 98109 USA
- Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, WA 98109 USA
| | - Laurent Kremer
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 route de Mende, 34293, Montpellier, France
- INSERM, IRIM, 34293 Montpellier, France
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10
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Calvet-Seral J, Crespo-Yuste E, Mathys V, Rodriguez-Villalobos H, Ceyssens PJ, Martin A, Gonzalo-Asensio J. Targeted Chromosomal Barcoding Establishes Direct Genotype-Phenotype Associations for Antibiotic Resistance in Mycobacterium abscessus. Microbiol Spectr 2023; 11:e0534422. [PMID: 36988496 PMCID: PMC10269753 DOI: 10.1128/spectrum.05344-22] [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: 12/28/2022] [Accepted: 03/04/2023] [Indexed: 03/30/2023] Open
Abstract
A bedaquiline-resistant Mycobacterium abscessus isolate was sequenced, and a candidate mutation in the atpE gene was identified as responsible for the antibiotic resistance phenotype. To establish a direct genotype-phenotype relationship of this mutation which results in a Asp-to-Ala change at position 29 (D29A), we developed a recombineering-based method consisting of the specific replacement of the desired mutation in the bacterial chromosome. As surrogate bacteria, we used two M. abscessus bedaquiline-susceptible strains: ATCC 19977 and the SL541 clinical isolate. The allelic exchange substrates used in recombineering carried either the sole D29A mutation or a genetic barcode of silent mutations in codons flanking the D29A mutation. After selection of bedaquiline-resistant M. abscessus colonies transformed with both substrates, we obtained equivalent numbers of recombinants. These resistant colonies were analyzed by allele-specific PCR and Sanger sequencing, and we demonstrated that the presence of the genetic barcode was linked to the targeted incorporation of the desired mutation in its chromosomal location. All recombinants displayed the same MIC to bedaquiline as the original isolate, from which the D29A mutation was identified. Finally, to demonstrate the broad applicability of this method, we confirmed the association of bedaquiline resistance with the atpE A64P mutation in analysis performed in independent M. abscessus strains and by independent researchers. IMPORTANCE Antimicrobial resistance (AMR) threatens the effective prevention and treatment of an ever-increasing range of infections caused by microorganisms. On the other hand, infections caused by Mycobacterium abscessus affect people with chronic lung diseases, and their incidence has grown alarmingly in recent years. Further, these bacteria are known to easily develop AMR to the few therapeutic options available, making their treatment long-lasting and challenging. The recent introduction of new antibiotics against M. abscessus, such as bedaquiline, makes us anticipate a future when a plethora of antibiotic-resistant strains will be isolated and sequenced. However, in the era of whole-genome sequencing, one of the challenges is to unequivocally assign a biological function to each identified polymorphism. Thus, in this study, we developed a fast, robust, and reliable method to assign genotype-phenotype associations for putative antibiotic-resistant polymorphisms in M. abscessus.
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Affiliation(s)
- Juan Calvet-Seral
- Grupo de Genética de Micobacterias, Departamento de Microbiología, Facultad de Medicina, Universidad de Zaragoza IIS-Aragón, Zaragoza, Spain
- CIBER Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
| | - Estefanía Crespo-Yuste
- Grupo de Genética de Micobacterias, Departamento de Microbiología, Facultad de Medicina, Universidad de Zaragoza IIS-Aragón, Zaragoza, Spain
- CIBER Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
| | - Vanessa Mathys
- Unit of Human Bacterial Diseases, Sciensano, Brussels, Belgium
| | - Hector Rodriguez-Villalobos
- Cliniques Universitaires Saint-Luc, Microbiology Department, Université Catholique de Louvain, Brussels, Belgium
| | | | - Anandi Martin
- Institute of Experimental and Clinical Research, Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
- Syngulon, Seraing, Belgium
| | - Jesús Gonzalo-Asensio
- Grupo de Genética de Micobacterias, Departamento de Microbiología, Facultad de Medicina, Universidad de Zaragoza IIS-Aragón, Zaragoza, Spain
- CIBER Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
- Instituto de Biocomputación y Física de Sistemas Complejos, Zaragoza, Spain
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11
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Nguyen TQ, Heo BE, Hanh BTB, Jeon S, Park Y, Choudhary A, Lee S, Kim TH, Moon C, Min SJ, Jang J. DS86760016, a Leucyl-tRNA Synthetase Inhibitor, Is Active against Mycobacterium abscessus. Antimicrob Agents Chemother 2023; 67:e0156722. [PMID: 37212672 PMCID: PMC10269085 DOI: 10.1128/aac.01567-22] [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: 11/23/2022] [Accepted: 04/27/2023] [Indexed: 05/23/2023] Open
Abstract
Benzoxaboroles are a new class of leucyl-tRNA synthetase inhibitors. Epetraborole, a benzoxaborole, is a clinical candidate developed for Gram-negative infections and has been confirmed to exhibit favorable activity against a well known pulmonary pathogen, Mycobacterium abscessus. However, according to ClinicalTrials.gov, in 2017, a clinical phase II study on the use of epetraborole to treat complicated urinary tract and intra-abdominal infections was terminated due to the rapid emergence of drug resistance during treatment. Nevertheless, epetraborole is in clinical development for nontuberculous mycobacteria (NTM) disease especially for Mycobacterium avium complex-related pulmonary disease (MAC-PD). DS86760016, an epetraborole analog, was further demonstrated to have an improved pharmacokinetic profile, lower plasma clearance, longer plasma half-life, and higher renal excretion than epetraborole in animal models. In this study, DS86760016 was found to be similarly active against M. abscessus in vitro, intracellularly, and in zebrafish infection models with a low mutation frequency. These results expand the diversity of druggable compounds as new benzoxaborole-based candidates for treating M. abscessus diseases.
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Affiliation(s)
- Thanh Quang Nguyen
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Bo Eun Heo
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Bui Thi Bich Hanh
- Division of Applied Life Science (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Seunghyeon Jeon
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Yujin Park
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Arunima Choudhary
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Sujin Lee
- Department of Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, Gyeonggi-do, Republic of Korea
| | - Tae Ho Kim
- Division of Applied Life Science (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
| | - Cheol Moon
- Department of Clinical Laboratory Science, Semyung University, Jecheon, Republic of Korea
| | - Sun-Joon Min
- Department of Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, Gyeonggi-do, Republic of Korea
- Department of Chemical and Molecular Engineering, Hanyang University, Ansan, Gyeonggi-do, Republic of Korea
| | - Jichan Jang
- Division of Life Science, Department of Bio & Medical Big Data (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
- Division of Applied Life Science (BK21 Four Program), Research Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
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12
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Parmar S, Tocheva EI. The cell envelope of Mycobacterium abscessus and its role in pathogenesis. PLoS Pathog 2023; 19:e1011318. [PMID: 37200238 DOI: 10.1371/journal.ppat.1011318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Abstract
Mycobacterium abscessus is a nontuberculosis mycobacterium (NTM) that has shown an exponential rise in its ability to cause disease. Due to its ubiquitous presence in the environment, M. abscessus is widely implicated in secondary exacerbations of many nosocomial infections and genetic respiratory disorders, such as cystic fibrosis (CF). Contrary to other rapidly growing NTMs, the cell envelope of M. abscessus harbors several prominent features and undergoes modifications that are responsible for its pathogenesis. Compositional changes of the mycobacterial outer membrane (MOM) significantly decrease the presence of glycopeptidolipids (GPLs) and enable the transition from a colonizing, smooth morphotype into a virulent, rough morphotype. The GPLs are transported to the MOM by the Mycobacterial membrane proteins Large (MmpL), which further act as drug efflux pumps and confer antibiotic resistance. Lastly, M. abscessus possesses 2 type VII secretion systems (T7SS): ESX-3 and ESX-4, both of which have recently been implicated in host-pathogen interactions and virulence. This review summarizes the current knowledge of M. abscessus pathogenesis and highlights the clinically relevant association between the structure and functions of its cell envelope.
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Affiliation(s)
- Shweta Parmar
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada
| | - Elitza I Tocheva
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada
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13
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Gilliland HN, Beckman OK, Olive AJ. A Genome-Wide Screen in Macrophages Defines Host Genes Regulating the Uptake of Mycobacterium abscessus. mSphere 2023; 8:e0066322. [PMID: 36794958 PMCID: PMC10117111 DOI: 10.1128/msphere.00663-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/26/2023] [Indexed: 02/17/2023] Open
Abstract
The interactions between a host cell and a pathogen can dictate disease outcomes and are important targets for host-directed therapies. Mycobacterium abscessus (Mab) is a highly antibiotic resistant, rapidly growing nontuberculous mycobacterium that infects patients with chronic lung diseases. Mab can infect host immune cells, such as macrophages, which contribute to its pathogenesis. However, our understanding of initial host-Mab interactions remains unclear. Here, we developed a functional genetic approach to define these host-Mab interactions by coupling a Mab fluorescent reporter with a genome-wide knockout library in murine macrophages. We used this approach to conduct a forward genetic screen to define host genes that contribute to the uptake of Mab by macrophages. We identified known regulators of phagocytosis, such as the integrin ITGB2, and uncovered a key requirement for glycosaminoglycan (sGAG) synthesis for macrophages to efficiently take up Mab. CRISPR-Cas9 targeting of three key sGAG biosynthesis regulators, Ugdh, B3gat3, and B4galt7 resulted in reduced uptake of both smooth and rough Mab variants by macrophages. Mechanistic studies suggest that sGAGs function upstream of pathogen engulfment and are required for the uptake of Mab, but not Escherichia coli or latex beads. Further investigation found that the loss of sGAGs reduced the surface expression, but not the mRNA expression, of key integrins, suggesting an important role for sGAGs in modulating surface receptor availability. Together, these studies globally define and characterize important regulators of macrophage-Mab interactions and are a first step to understanding host genes that contribute to Mab pathogenesis and disease. IMPORTANCE Pathogen interactions with immune cells like macrophages contribute to pathogenesis, yet the mechanisms underlying these interactions remain largely undefined. For emerging respiratory pathogens, like Mycobacterium abscessus, understanding these host-pathogen interactions is important to fully understand disease progression. Given that M. abscessus is broadly recalcitrant to antibiotic treatments, new therapeutic approaches are needed. Here, we leveraged a genome-wide knockout library in murine macrophages to globally define host genes required for M. abscessus uptake. We identified new macrophage uptake regulators during M. abscessus infection, including a subset of integrins and the glycosaminoglycan synthesis (sGAG) pathway. While ionic characteristics of sGAGs are known to drive pathogen-cell interactions, we discovered a previously unrecognized requirement for sGAGs to maintain robust surface expression of key uptake receptors. Thus, we developed a flexible forward-genetic pipeline to define important interactions during M. abscessus infection and more broadly identified a new mechanism by which sGAGs control pathogen uptake.
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Affiliation(s)
- Haleigh N. Gilliland
- Department of Microbiology and Molecular Genetics, College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan, USA
| | - Olivia K. Beckman
- Department of Microbiology and Molecular Genetics, College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan, USA
| | - Andrew J. Olive
- Department of Microbiology and Molecular Genetics, College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan, USA
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14
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Alcaraz M, Roquet-Banères F, Leon-Icaza SA, Abendroth J, Boudehen YM, Cougoule C, Edwards TE, Kremer L. Efficacy and Mode of Action of a Direct Inhibitor of Mycobacterium abscessus InhA. ACS Infect Dis 2022; 8:2171-2186. [PMID: 36107992 DOI: 10.1021/acsinfecdis.2c00314] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
There is an unmet medical need for effective treatments against Mycobacterium abscessus pulmonary infections, to which cystic fibrosis (CF) patients are particularly vulnerable. Recent studies showed that the antitubercular drug isoniazid is inactive against M. abscessus due to the incapacity of the catalase-peroxidase to convert the pro-drug into a reactive metabolite that inhibits the enoyl-ACP reductase InhA. To validate InhAMAB as a druggable target in M. abscessus, we assayed the activity of NITD-916, a 4-hydroxy-2-pyridone lead candidate initially described as a direct inhibitor of InhA that bypasses KatG bioactivation in Mycobacterium tuberculosis. The compound displayed low MIC values against rough and smooth clinical isolates in vitro and significantly reduced the bacterial burden inside human macrophages. Moreover, treatment with NITD-916 reduced the number and size of intracellular mycobacterial cords, regarded as markers of the severity of the infection. Importantly, NITD-916 significantly lowered the M. abscessus burden in CF-derived lung airway organoids. From a mechanistic perspective, NITD-916 abrogated de novo synthesis of mycolic acids and NITD-916-resistant spontaneous mutants harbored point mutations in InhAMAB at residue 96. That NITD-916 targets InhAMAB directly without activation requirements was confirmed genetically and by resolving the crystal structure of the protein in complex with NADH and NITD-916. These findings collectively indicate that InhAMAB is an attractive target to be exploited for future chemotherapeutic developments against this difficult-to-treat mycobacterium and highlight the potential of NITD-916 derivatives for further evaluation in preclinical settings.
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Affiliation(s)
- Matthéo Alcaraz
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Françoise Roquet-Banères
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Stephen Adonai Leon-Icaza
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, 31400 Toulouse, France
| | - Jan Abendroth
- UCB BioSciences, Bainbridge Island, Washington 98109, United States.,Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98109, United States
| | - Yves-Marie Boudehen
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France
| | - Céline Cougoule
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, 31400 Toulouse, France
| | - Thomas E Edwards
- UCB BioSciences, Bainbridge Island, Washington 98109, United States.,Seattle Structural Genomics Center for Infectious Disease (SSGCID), Seattle, Washington 98109, United States
| | - Laurent Kremer
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 1919 route de Mende, 34293 Montpellier, France.,INSERM, IRIM, 34293 Montpellier, France
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15
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Abdelaal HFM, Chan ED, Young L, Baldwin SL, Coler RN. Mycobacterium abscessus: It’s Complex. Microorganisms 2022; 10:microorganisms10071454. [PMID: 35889173 PMCID: PMC9316637 DOI: 10.3390/microorganisms10071454] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/12/2022] [Accepted: 07/16/2022] [Indexed: 12/21/2022] Open
Abstract
Mycobacterium abscessus (M. abscessus) is an opportunistic pathogen usually colonizing abnormal lung airways and is often seen in patients with cystic fibrosis. Currently, there is no vaccine available for M. abscessus in clinical development. The treatment of M. abscessus-related pulmonary diseases is peculiar due to intrinsic resistance to several commonly used antibiotics. The development of either prophylactic or therapeutic interventions for M. abscessus pulmonary infections is hindered by the absence of an adequate experimental animal model. In this review, we outline the critical elements related to M. abscessus virulence mechanisms, host–pathogen interactions, and treatment challenges associated with M. abscessus pulmonary infections. The challenges of effectively combating this pathogen include developing appropriate preclinical animal models of infection, developing proper diagnostics, and designing novel strategies for treating drug-resistant M. abscessus.
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Affiliation(s)
- Hazem F. M. Abdelaal
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98145, USA; (H.F.M.A.); (S.L.B.)
| | - Edward D. Chan
- Department of Academic Affairs and Medicine, National Jewish Health, Denver, CO 80206, USA;
- Pulmonary Section, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO 80045, USA
| | - Lisa Young
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA;
| | - Susan L. Baldwin
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98145, USA; (H.F.M.A.); (S.L.B.)
| | - Rhea N. Coler
- Center for Global Infectious Disease Research, Seattle Children’s Research Institute, Seattle, WA 98145, USA; (H.F.M.A.); (S.L.B.)
- Department of Pediatrics, University of Washington School of Medicine, Seattle, WA 98195, USA
- Department of Global Health, University of Washington, Seattle, WA 98195, USA
- Correspondence:
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16
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Cohen-Cymberknoh M, Kolodkin-Gal D, Keren-Paz A, Peretz S, Brumfeld V, Kapishnikov S, Suissa R, Shteinberg M, McLeod D, Maan H, Patrauchan M, Zamir G, Kerem E, Kolodkin-Gal I. Calcium carbonate mineralization is essential for biofilm formation and lung colonization. iScience 2022; 25:104234. [PMID: 35521519 PMCID: PMC9062676 DOI: 10.1016/j.isci.2022.104234] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/18/2021] [Accepted: 04/07/2022] [Indexed: 11/27/2022] Open
Abstract
Biofilms are differentiated microbial communities held together by an extracellular matrix. μCT X-ray revealed structured mineralized areas within biofilms of lung pathogens belonging to two distant phyla - the proteobacteria Pseudomonas aeruginosa and the actinobacteria Mycobacterium abscessus. Furthermore, calcium chelation inhibited the assembly of complex bacterial structures for both organisms with little to no effect on cell growth. The molecular mechanisms promoting calcite scaffold formation were surprisingly conserved between the two pathogens as biofilm development was similarly impaired by genetic and biochemical inhibition of calcium uptake and carbonate accumulation. Moreover, chemical inhibition and mutations targeting mineralization significantly reduced the attachment of P. aeruginosa to the lung, as well as the subsequent damage inflicted by biofilms to lung tissues, and restored their sensitivity to antibiotics. This work offers underexplored druggable targets for antibiotics to combat otherwise untreatable biofilm infections.
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Affiliation(s)
- Malena Cohen-Cymberknoh
- Pediatric Pulmonary Unit and Cystic fibrosis Center, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Dror Kolodkin-Gal
- Department of Experimental Surgery, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Alona Keren-Paz
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
- National Center for Antibiotic Resistance and Infection Control, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Shani Peretz
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Vlad Brumfeld
- Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel
| | - Sergey Kapishnikov
- Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel
| | - Ronit Suissa
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Michal Shteinberg
- Pulmonology Institute and CF Center, Carmel Medical Center, Haifa, Israel
| | - Daniel McLeod
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, USA
| | - Harsh Maan
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Marianna Patrauchan
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, USA
| | - Gideon Zamir
- Department of Experimental Surgery, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Eitan Kerem
- Pediatric Pulmonary Unit and Cystic fibrosis Center, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Ilana Kolodkin-Gal
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
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17
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Ferrell KC, Johansen MD, Triccas JA, Counoupas C. Virulence Mechanisms of Mycobacterium abscessus: Current Knowledge and Implications for Vaccine Design. Front Microbiol 2022; 13:842017. [PMID: 35308378 PMCID: PMC8928063 DOI: 10.3389/fmicb.2022.842017] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 02/08/2022] [Indexed: 12/22/2022] Open
Abstract
Mycobacterium abscessus is a member of the non-tuberculous mycobacteria (NTM) group, responsible for chronic infections in individuals with cystic fibrosis (CF) or those otherwise immunocompromised. While viewed traditionally as an opportunistic pathogen, increasing research into M. abscessus in recent years has highlighted its continued evolution into a true pathogen. This is demonstrated through an extensive collection of virulence factors (VFs) possessed by this organism which facilitate survival within the host, particularly in the harsh environment of the CF lung. These include VFs resembling those of other Mycobacteria, and non-mycobacterial VFs, both of which make a notable contribution in shaping M. abscessus interaction with the host. Mycobacterium abscessus continued acquisition of VFs is cause for concern and highlights the need for novel vaccination strategies to combat this pathogen. An effective M. abscessus vaccine must be suitably designed for target populations (i.e., individuals with CF) and incorporate current knowledge on immune correlates of protection against M. abscessus infection. Vaccination strategies must also build upon lessons learned from ongoing efforts to develop novel vaccines for other pathogens, particularly Mycobacterium tuberculosis (M. tb); decades of research into M. tb has provided insight into unconventional and innovative vaccine approaches that may be applied to M. abscessus. Continued research into M. abscessus pathogenesis will be critical for the future development of safe and effective vaccines and therapeutics to reduce global incidence of this emerging pathogen.
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Affiliation(s)
- Kia C. Ferrell
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
- Tuberculosis Research Program, Centenary Institute, Sydney, NSW, Australia
- *Correspondence: Kia C. Ferrell,
| | - Matt D. Johansen
- Centre for Inflammation, Centenary Institute, University of Technology, Sydney, NSW, Australia
- Faculty of Science, School of Life Sciences, University of Technology, Sydney, NSW, Australia
| | - James A. Triccas
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
- Sydney Institute for Infectious Diseases and the Charles Perkins Centre, The University of Sydney, Camperdown, NSW, Australia
| | - Claudio Counoupas
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
- Tuberculosis Research Program, Centenary Institute, Sydney, NSW, Australia
- Sydney Institute for Infectious Diseases and the Charles Perkins Centre, The University of Sydney, Camperdown, NSW, Australia
- Claudio Counoupas,
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18
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Kam JY, Hortle E, Krogman E, Warner SE, Wright K, Luo K, Cheng T, Manuneedhi Cholan P, Kikuchi K, Triccas JA, Britton WJ, Johansen MD, Kremer L, Oehlers SH. Rough and smooth variants of Mycobacterium abscessus are differentially controlled by host immunity during chronic infection of adult zebrafish. Nat Commun 2022; 13:952. [PMID: 35177649 PMCID: PMC8854618 DOI: 10.1038/s41467-022-28638-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 02/03/2022] [Indexed: 11/09/2022] Open
Abstract
Prevalence of Mycobacterium abscessus infections is increasing in patients with respiratory comorbidities. After initial colonisation, M. abscessus smooth colony (S) variants can undergo an irreversible genetic switch into highly inflammatory, rough colony (R) variants, often associated with a decline in pulmonary function. Here, we use an adult zebrafish model of chronic infection with R and S variants to study M. abscessus pathogenesis in the context of fully functioning host immunity. We show that infection with an R variant causes an inflammatory immune response that drives necrotic granuloma formation through host TNF signalling, mediated by the tnfa, tnfr1 and tnfr2 gene products. T cell-dependent immunity is stronger against the R variant early in infection, and regulatory T cells associate with R variant granulomas and limit bacterial growth. In comparison, an S variant proliferates to high burdens but appears to be controlled by TNF-dependent innate immunity early during infection, resulting in delayed granuloma formation. Thus, our work demonstrates the applicability of adult zebrafish to model persistent M. abscessus infection, and illustrates differences in the immunopathogenesis induced by R and S variants during granulomatous infection. The pathogen Mycobacterium abscessus can switch from a smooth colony form (S) into a highly inflammatory, rough colony form (R) during infection. Here, Kam et al. use an adult zebrafish model of M. abscessus chronic infection to illustrate differences in the immunopathogenesis induced by R and S variants.
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Affiliation(s)
- Julia Y Kam
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia
| | - Elinor Hortle
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia.,The University of Sydney, Faculty of Medicine and Health & Marie Bashir Institute, Camperdown, NSW, Australia
| | - Elizabeth Krogman
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia
| | - Sherridan E Warner
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia.,The University of Sydney, Faculty of Medicine and Health & Marie Bashir Institute, Camperdown, NSW, Australia
| | - Kathryn Wright
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia
| | - Kaiming Luo
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia
| | - Tina Cheng
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia
| | - Pradeep Manuneedhi Cholan
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia
| | - Kazu Kikuchi
- Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia.,St. Vincent's Clinical School, University of New South Wales, Kensington, NSW, Australia
| | - James A Triccas
- The University of Sydney, Faculty of Medicine and Health & Marie Bashir Institute, Camperdown, NSW, Australia
| | - Warwick J Britton
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia.,Department of Clinical Immunology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Matt D Johansen
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, Montpellier, France
| | - Laurent Kremer
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, Montpellier, France.,INSERM, IRIM, Montpellier, France
| | - Stefan H Oehlers
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Camperdown, NSW, Australia. .,The University of Sydney, Faculty of Medicine and Health & Marie Bashir Institute, Camperdown, NSW, Australia. .,A*STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.
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19
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Mycobacterial Adhesion: From Hydrophobic to Receptor-Ligand Interactions. Microorganisms 2022; 10:microorganisms10020454. [PMID: 35208908 PMCID: PMC8875947 DOI: 10.3390/microorganisms10020454] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/07/2022] [Accepted: 02/12/2022] [Indexed: 11/24/2022] Open
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.
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20
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Park EJ, Silwal P, Jo EK. Host-Pathogen Interactions Operative during Mycobacteroides abscessus Infection. Immune Netw 2022; 21:e40. [PMID: 35036027 PMCID: PMC8733189 DOI: 10.4110/in.2021.21.e40] [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: 08/31/2021] [Revised: 12/01/2021] [Accepted: 12/09/2021] [Indexed: 12/01/2022] Open
Abstract
Mycobacteroides abscessus (previously Mycobacterium abscessus; Mabc), one of rapidly growing nontuberculous mycobacteria (NTM), is an important pathogen of NTM pulmonary diseases (NTM-PDs) in both immunocompetent and immunocompromised individuals. Mabc infection is chronic and often challenging to treat due to drug resistance, motivating the development of new therapeutics. Despite this, there is a lack of understanding of the relationship between Mabc and the immune system. This review highlights recent progress in the molecular architecture of Mabc and host interactions. We discuss several microbial components that take advantage of host immune defenses, host defense pathways that can overcome Mabc pathogenesis, and how host-pathogen interactions determine the outcomes of Mabc infection. Understanding the molecular mechanisms underlying host-pathogen interactions during Mabc infection will enable the identification of biomarkers and/or drugs to control immune pathogenesis and protect against NTM infection.
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Affiliation(s)
- Eun-Jin Park
- Department of Microbiology, Chungnam National University College of Medicine, Daejeon 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University College of Medicine, Daejeon 35015, Korea
| | - Prashanta Silwal
- Department of Microbiology, Chungnam National University College of Medicine, Daejeon 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University College of Medicine, Daejeon 35015, Korea
| | - Eun-Kyeong Jo
- Department of Microbiology, Chungnam National University College of Medicine, Daejeon 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University College of Medicine, Daejeon 35015, Korea
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21
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Ge G, Jiang H, Xiong J, Zhang W, Shi Y, Tao C, Wang H. Progress of the Art of Macrophage Polarization and Different Subtypes in Mycobacterial Infection. Front Immunol 2021; 12:752657. [PMID: 34899703 PMCID: PMC8660122 DOI: 10.3389/fimmu.2021.752657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/14/2021] [Indexed: 11/13/2022] Open
Abstract
Mycobacteriosis, mostly resulting from Mycobacterium tuberculosis (MTb), nontuberculous mycobacteria (NTM), and Mycobacterium leprae (M. leprae), is the long-standing granulomatous disease that ravages several organs including skin, lung, and peripheral nerves, and it has a spectrum of clinical-pathologic features based on the interaction of bacilli and host immune response. Histiocytes in infectious granulomas mainly consist of infected and uninfected macrophages (Mφs), multinucleated giant cells (MGCs), epithelioid cells (ECs), and foam cells (FCs), which are commonly discovered in lesions in patients with mycobacteriosis. Granuloma Mφ polarization or reprogramming is the crucial appearance of the host immune response to pathogen aggression, which gets a command of endocellular microbe persistence. Herein, we recapitulate the current gaps and challenges during Mφ polarization and the different subpopulations of mycobacteriosis.
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Affiliation(s)
- Gai Ge
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Haiqin Jiang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Jingshu Xiong
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Wenyue Zhang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Ying Shi
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Chenyue Tao
- Imperial College London, London, United Kingdom
| | - Hongsheng Wang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.,National Center for Sexually Transmitted Disease and Leprosy Control, China Centers for Disease Control and Prevention, Nanjing, China.,Centre for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
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22
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Dokic A, Peterson E, Arrieta-Ortiz ML, Pan M, Di Maio A, Baliga N, Bhatt A. Mycobacterium abscessus biofilms produce an extracellular matrix and have a distinct mycolic acid profile. Cell Surf 2021; 7:100051. [PMID: 33912773 PMCID: PMC8066798 DOI: 10.1016/j.tcsw.2021.100051] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 02/06/2023] Open
Abstract
A non-tuberculous mycobacterium, Mycobacterium abscessus is an emerging opportunistic pathogen associated with difficult to treat pulmonary infections, particularly in patients suffering from cystic fibrosis. It is capable of forming biofilms in vitro that result in an increase of already high levels of antibiotic resistance in this bacterium. Evidence that M. abscessus forms biofilm-like microcolonies in patient lungs and on medical devices further implicated the need to investigate this biofilm in detail. Therefore, in this study we characterized the M. abscessus pellicular biofilm, formed on a liquid-air interface, by studying its molecular composition, and its transcriptional profile in comparison to planktonic cells. Using scanning electron micrographs and fluorescence microscopy, we showed that M. abscessus biofilms produce an extracellular matrix composed of lipids, proteins, carbohydrates and extracellular DNA. Transcriptomic analysis of biofilms revealed an upregulation of pathways involved in the glyoxylate shunt, redox metabolism and mycolic acid biosynthesis. Genes involved in elongation and desaturation of mycolic acids were highly upregulated in biofilms and, mirroring those findings, biochemical analysis of mycolates revealed molecular changes and an increase in mycolic acid chain length. Together these results give us an insight into the complex structure of M. abscessus biofilms, the understanding of which may be adapted for clinical use in treatment of biofilm infections, including strategies for dispersing the extracellular matrix, allowing antibiotics to gain access to bacteria within the biofilm.
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Affiliation(s)
- Anja Dokic
- School of Biosciences and Institute of Microbiology and Infection, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | | | | | - Min Pan
- Institute for Systems Biology, Seattle, WA 98109 USA
| | - Alessandro Di Maio
- School of Biosciences and Institute of Microbiology and Infection, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Nitin Baliga
- Institute for Systems Biology, Seattle, WA 98109 USA
| | - Apoorva Bhatt
- School of Biosciences and Institute of Microbiology and Infection, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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23
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Mycobacterium abscessus Strain Morphotype Determines Phage Susceptibility, the Repertoire of Therapeutically Useful Phages, and Phage Resistance. mBio 2021; 12:mBio.03431-20. [PMID: 33785625 PMCID: PMC8092298 DOI: 10.1128/mbio.03431-20] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Mycobacterium abscessus infections in cystic fibrosis patients are challenging to treat due to widespread antibiotic resistance. The therapeutic use of lytic bacteriophages presents a new potential strategy, but the great variation among clinical M. abscessus isolates demands determination of phage susceptibility prior to therapy. Mycobacterium abscessus is an opportunistic pathogen whose treatment is confounded by widespread multidrug resistance. The therapeutic use of bacteriophages against Mycobacterium abscessus infections offers a potential alternative approach, although the spectrum of phage susceptibilities among M. abscessus isolates is not known. We determined the phage infection profiles of 82 M. abscessus recent clinical isolates and find that colony morphotype—rough or smooth—is a key indicator of phage susceptibility. None of the smooth strains are efficiently killed by any phages, whereas 80% of rough strains are infected and efficiently killed by at least one phage. The repertoire of phages available for potential therapy of rough morphotype infections includes those with relatively broad host ranges, host range mutants of Mycobacterium smegmatis phages, and lytically propagated viruses derived from integrated prophages. The rough colony morphotype results from indels in the glycopeptidolipid synthesis genes mps1 and mps2, negating reversion to smooth as a common route to phage resistance. Resistance is thus rare, and although mutations in polyketide synthesis, uvrD2, and rpoZ can confer resistance, these likely also impair survival in vivo. The expanded therapeutic repertoire and the resistance profiles show that small cocktails or single phages could be suitable for controlling infections with rough strains.
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24
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Liu TY, Tsai SH, Chen JW, Wang YC, Hu ST, Chen YY. Mab_3083c Is a Homologue of RNase J and Plays a Role in Colony Morphotype, Aggregation, and Sliding Motility of Mycobacterium abscessus. Microorganisms 2021; 9:microorganisms9040676. [PMID: 33805851 PMCID: PMC8064342 DOI: 10.3390/microorganisms9040676] [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: 02/24/2021] [Revised: 03/14/2021] [Accepted: 03/19/2021] [Indexed: 12/17/2022] Open
Abstract
Mycobacterium abscessus is an opportunistic pathogen causing human diseases, especially in immunocompromised patients. M. abscessus strains with a rough morphotype are more virulent than those with a smooth morphotype. Morphotype switch may occur during a clinical infection. To investigate the genes involved in colony morphotype switching, we performed transposon mutagenesis in a rough clinical strain of M. abscessus. A morphotype switching mutant (smooth) named mab_3083c::Tn was obtained. This mutant was found to have a lower aggregative ability and a higher sliding motility than the wild type strain. However, its glycopeptidolipid (GPL) content remained the same as those of the wild type. Complementation of the mutant with a functional mab_3083c gene reverted its morphotype back to rough, indicating that mab_3083c is associated with colony morphology of M. abscessus. Bioinformatic analyses showed that mab_3083c has a 75.4% identity in amino acid sequence with the well-characterized ribonuclease J (RNase J) of M. smegmatis (RNase JMsmeg). Complementation of the mutant with the RNase J gene of M. smegmatis also switched its colony morphology from smooth back to rough. These results suggest that Mab_3083c is a homologue of RNase J and involved in regulating M. abscessus colony morphotype switching.
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Affiliation(s)
- Ting-Yu Liu
- Institute of Microbiology and Immunology, School of Life Science, National Yang-Ming University, Taipei 112, Taiwan; (T.-Y.L.); (S.-H.T.)
| | - Sheng-Hui Tsai
- Institute of Microbiology and Immunology, School of Life Science, National Yang-Ming University, Taipei 112, Taiwan; (T.-Y.L.); (S.-H.T.)
| | - Jenn-Wei Chen
- Department of Microbiology and Immunology, College of Medicine, National Cheng-Kung University, Tainan 701, Taiwan;
- Institute of Basic Medical Sciences, College of Medicine, National Cheng-Kung University, Tainan 701, Taiwan
| | - Yu-Ching Wang
- Department of Biochemical Science and Technology, National Chiayi Univeristy, Chiayi City 600, Taiwan;
| | - Shiau-Ting Hu
- Institute of Microbiology and Immunology, School of Life Science, National Yang-Ming University, Taipei 112, Taiwan; (T.-Y.L.); (S.-H.T.)
- Correspondence: (S.-T.H.); (Y.-Y.C.)
| | - Yih-Yuan Chen
- Department of Biochemical Science and Technology, National Chiayi Univeristy, Chiayi City 600, Taiwan;
- Correspondence: (S.-T.H.); (Y.-Y.C.)
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25
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Li B, Ye M, Zhao L, Guo Q, Chen J, Xu B, Zhan M, Zhang Y, Zhang Z, Chu H. Glycopeptidolipid Genotype Correlates With the Severity of Mycobacterium abscessus Lung Disease. J Infect Dis 2021; 221:S257-S262. [PMID: 32176786 DOI: 10.1093/infdis/jiz475] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Smooth and rough colony morphotypes of Mycobacterium abscessus are associated with virulence, but some isolates form both smooth and rough colonies, impeding successful morphotype identification. Reportedly, smooth/rough morphotypes are also related to the glycopeptidolipid (GPL) genotype. However, the accuracy of GPL genotyping to discriminate morphotypes and the relationship between GPL genotype and clinical characteristics of M abscessus lung disease have not been verified. METHODS A retrospective analysis of colony morphology, GPL genotype, and clinical data from 182 patients with M abscessus lung disease was conducted. RESULTS Of 194 clinical isolates, 126 (65.0%), 15 (7.7%), and 53 (27.3%) exhibited rough, smooth, and mixed colony morphotypes, respectively. Glycopeptidolipid genotyping indicated that 86.7% (13 of 15) of smooth isolates belonged to the GPL-wild type (WT) group, whereas 98.4% (124 of 126) of rough isolates belonged to the GPL-mutant type (MUT) group. Therefore, GPL genotyping accurately distinguished between smooth and rough morphotypes. Mixed colony morphotypes were also divided into GPL-WT (18.9%) and GPL-MUT (81.1%) groups. Further analysis revealed that patients infected with the GPL-MUT group presented with significantly worse baseline clinical characteristics and exacerbated episodes of lung disease. CONCLUSIONS Glycopeptidolipid genotyping accurately distinguishes smooth and rough colony morphotypes. Patients infected with the GPL-MUT genotype exhibit worse clinical characteristics and are at a higher risk of exacerbated lung disease.
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Affiliation(s)
- Bing Li
- Department of Respiratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Meiping Ye
- Department of Respiratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lan Zhao
- Department of Respiratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Qi Guo
- Tongji University School of Medicine, Shanghai, China
| | - Jianhui Chen
- Tongji University School of Medicine, Shanghai, China
| | - Benyong Xu
- Tongji University School of Medicine, Shanghai, China
| | - Mengling Zhan
- Tongji University School of Medicine, Shanghai, China
| | - Yongjie Zhang
- Tongji University School of Medicine, Shanghai, China
| | - Zhemin Zhang
- Department of Respiratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Haiqing Chu
- Department of Respiratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
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26
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Küssau T, Van Wyk N, Johansen MD, Alsarraf HMAB, Neyret A, Hamela C, Sørensen KK, Thygesen MB, Beauvineau C, Kremer L, Blaise M. Functional Characterization of the N-Acetylmuramyl-l-Alanine Amidase, Ami1, from Mycobacterium abscessus. Cells 2020; 9:cells9112410. [PMID: 33158165 PMCID: PMC7694207 DOI: 10.3390/cells9112410] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/27/2020] [Accepted: 10/29/2020] [Indexed: 11/08/2022] Open
Abstract
Peptidoglycan (PG) is made of a polymer of disaccharides organized as a three-dimensional mesh-like network connected together by peptidic cross-links. PG is a dynamic structure that is essential for resistance to environmental stressors. Remodeling of PG occurs throughout the bacterial life cycle, particularly during bacterial division and separation into daughter cells. Numerous autolysins with various substrate specificities participate in PG remodeling. Expression of these enzymes must be tightly regulated, as an excess of hydrolytic activity can be detrimental for the bacteria. In non-tuberculous mycobacteria such as Mycobacterium abscessus, the function of PG-modifying enzymes has been poorly investigated. In this study, we characterized the function of the PG amidase, Ami1 from M. abscessus. An ami1 deletion mutant was generated and the phenotypes of the mutant were evaluated with respect to susceptibility to antibiotics and virulence in human macrophages and zebrafish. The capacity of purified Ami1 to hydrolyze muramyl-dipeptide was demonstrated in vitro. In addition, the screening of a 9200 compounds library led to the selection of three compounds inhibiting Ami1 in vitro. We also report the structural characterization of Ami1 which, combined with in silico docking studies, allows us to propose a mode of action for these inhibitors.
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Affiliation(s)
- Tanja Küssau
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
| | - Niël Van Wyk
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
| | - Matt D. Johansen
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
| | - Husam M. A. B. Alsarraf
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus C, Denmark
| | - Aymeric Neyret
- CEMIPAI CNRS UM UMS3725, CEDEX 5, 34293 Montpellier, France;
| | - Claire Hamela
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
| | - Kasper K. Sørensen
- Department of Chemistry, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark; (K.K.S.); (M.B.T.)
| | - Mikkel B. Thygesen
- Department of Chemistry, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark; (K.K.S.); (M.B.T.)
| | - Claire Beauvineau
- Chemical Library Institut Curie/CNRS, CNRS UMR9187, INSERM U1196 and CNRS UMR3666, INSERM U1193, Université Paris-Saclay, F-91405 Orsay, France;
| | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
- INSERM, IRIM, 34293 Montpellier, France
- Correspondence: (L.K.); (M.B.); Tel.: +33-(0)-434-359-447 (L.K. & M.B.)
| | - Mickaël Blaise
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR 9004, CEDEX 5, 34293 Montpellier, France; (T.K.); (N.V.W.); (M.D.J.); (H.M.A.B.A.); (C.H.)
- Correspondence: (L.K.); (M.B.); Tel.: +33-(0)-434-359-447 (L.K. & M.B.)
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27
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Rifabutin Is Bactericidal against Intracellular and Extracellular Forms of Mycobacterium abscessus. Antimicrob Agents Chemother 2020; 64:AAC.00363-20. [PMID: 32816730 DOI: 10.1128/aac.00363-20] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 08/03/2020] [Indexed: 12/26/2022] Open
Abstract
Mycobacterium abscessus is increasingly recognized as an emerging opportunistic pathogen causing severe lung diseases. As it is intrinsically resistant to most conventional antibiotics, there is an unmet medical need for effective treatments. Repurposing of clinically validated pharmaceuticals represents an attractive option for the development of chemotherapeutic alternatives against M. abscessus infections. In this context, rifabutin (RFB) has been shown to be active against M. abscessus and has raised renewed interest in using rifamycins for the treatment of M. abscessus pulmonary diseases. Here, we compared the in vitro and in vivo activity of RFB against the smooth and rough variants of M. abscessus, differing in their susceptibility profiles to several drugs and physiopathologial characteristics. While the activity of RFB is greater against rough strains than in smooth strains in vitro, suggesting a role of the glycopeptidolipid layer in susceptibility to RFB, both variants were equally susceptible to RFB inside human macrophages. RFB treatment also led to a reduction in the number and size of intracellular and extracellular mycobacterial cords. Furthermore, RFB was highly effective in a zebrafish model of infection and protected the infected larvae from M. abscessus-induced killing. This was corroborated by a significant reduction in the overall bacterial burden, as well as decreased numbers of abscesses and cords, two major pathophysiological traits in infected zebrafish. This study indicates that RFB is active against M. abscessus both in vitro and in vivo, further supporting its potential usefulness as part of combination regimens targeting this difficult-to-treat mycobacterium.
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28
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Viljoen A, Viela F, Kremer L, Dufrêne YF. Fast chemical force microscopy demonstrates that glycopeptidolipids define nanodomains of varying hydrophobicity on mycobacteria. NANOSCALE HORIZONS 2020; 5:944-953. [PMID: 32314749 DOI: 10.1039/c9nh00736a] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mycobacterium abscessus is an emerging multidrug-resistant bacterial pathogen causing severe lung infections in cystic fibrosis patients. A remarkable trait of this mycobacterial species is its ability to form morphologically smooth (S) and rough (R) colonies. The S-to-R transition is caused by the loss of glycopeptidolipids (GPLs) in the outer layer of the cell envelope and correlates with an increase in cording and virulence. Despite the physiological and medical importance of this morphological transition, whether it involves changes in cell surface properties remains unknown. Herein, we combine recently developed quantitative imaging (QI) atomic force microscopy (AFM) with hydrophobic tips to quantitatively map the surface structure and hydrophobicity of M. abscessus at high spatiotemporal resolution, and to assess how these properties are modulated by the S-to-R transition and by treatment with an inhibitor of the mycolic acid transporter MmpL3. We discover that loss of GPLs leads to major modifications in surface hydrophobicity, without any apparent change in cell surface ultrastructure. While R bacilli are homogeneously hydrophobic, S bacilli feature unusual variations of nanoscale hydrophobic properties. These previously undescribed cell surface nanodomains are likely to play critical roles in bacterial adhesion, aggregation, phenotypic heterogeneity and transmission, and in turn in virulence and pathogenicity. Our study also suggests that MmpL3 inhibitors show promise in nanomedicine as chemotherapeutic agents to interfere with the highly hydrophobic nature of the mycobacterial cell wall. The advantages of QI-AFM with hydrophobic tips are the ability to map chemical and structural properties simultaneously and at high resolution, applicable to a wide range of biosystems.
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Affiliation(s)
- Albertus Viljoen
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Croix du Sud, 4-5, bte L7.07.07, B-1348 Louvain-la-Neuve, Belgium.
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29
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Johansen MD, Herrmann JL, Kremer L. Non-tuberculous mycobacteria and the rise of Mycobacterium abscessus. Nat Rev Microbiol 2020; 18:392-407. [PMID: 32086501 DOI: 10.1038/s41579-020-0331-1] [Citation(s) in RCA: 358] [Impact Index Per Article: 89.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2020] [Indexed: 12/17/2022]
Abstract
Infections caused by non-tuberculous mycobacteria (NTM) are increasing globally and are notoriously difficult to treat due to intrinsic resistance of these bacteria to many common antibiotics. NTM are diverse and ubiquitous in the environment, with only a few species causing serious and often opportunistic infections in humans, including Mycobacterium abscessus. This rapidly growing mycobacterium is one of the most commonly identified NTM species responsible for severe respiratory, skin and mucosal infections in humans. It is often regarded as one of the most antibiotic-resistant mycobacteria, leaving us with few therapeutic options. In this Review, we cover the proposed infection process of M. abscessus, its virulence factors and host interactions and highlight the commonalities and differences of M. abscessus with other NTM species. Finally, we discuss drug resistance mechanisms and future therapeutic options. Taken together, this knowledge is essential to further our understanding of this overlooked and neglected global threat.
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Affiliation(s)
- Matt D Johansen
- Institut de Recherche en Infectiologie de Montpellier, Centre National de la Recherche Scientifique UMR 9004, Université de Montpellier, Montpellier, France
| | - Jean-Louis Herrmann
- Université Paris-Saclay, UVSQ, Inserm, Infection et Inflammation, Montigny-Le-Bretonneux, France.,AP-HP. GHU Paris Saclay, Hôpital Raymond Poincaré, Garches, France
| | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier, Centre National de la Recherche Scientifique UMR 9004, Université de Montpellier, Montpellier, France. .,Inserm, Institut de Recherche en Infectiologie de Montpellier, Montpellier, France.
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30
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Daniel-Wayman S, Abate G, Barber DL, Bermudez LE, Coler RN, Cynamon MH, Daley CL, Davidson RM, Dick T, Floto RA, Henkle E, Holland SM, Jackson M, Lee RE, Nuermberger EL, Olivier KN, Ordway DJ, Prevots DR, Sacchettini JC, Salfinger M, Sassetti CM, Sizemore CF, Winthrop KL, Zelazny AM. Advancing Translational Science for Pulmonary Nontuberculous Mycobacterial Infections. A Road Map for Research. Am J Respir Crit Care Med 2020; 199:947-951. [PMID: 30428263 DOI: 10.1164/rccm.201807-1273pp] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Shelby Daniel-Wayman
- 1 Epidemiology Unit, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases
| | - Getahun Abate
- 2 Division of Infectious Diseases, Allergy, and Immunology, Department of Internal Medicine, Saint Louis University, Saint Louis, Missouri
| | - Daniel L Barber
- 3 T Lymphocyte Biology Unit, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases
| | - Luiz E Bermudez
- 4 Department of Biomedical Sciences and.,5 Department of Microbiology, Oregon State University, Corvallis, Oregon
| | - Rhea N Coler
- 6 Infectious Disease Research Institute, Seattle, Washington.,7 Department of Global Health, University of Washington, Seattle, Washington
| | - Michael H Cynamon
- 8 Veterans Administration Medical Center, Syracuse, New York.,9 State University of New York Upstate Medical Center, Syracuse, New York
| | - Charles L Daley
- 10 Division of Mycobacterial and Respiratory Infections, Department of Medicine
| | | | - Thomas Dick
- 12 Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,13 Public Health Research Institute, New Jersey Medical School, Rutgers University, Newark, New Jersey
| | - R Andres Floto
- 14 Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | | | - Steven M Holland
- 16 Division of Intramural Research, National Institute of Allergy and Infectious Diseases
| | - Mary Jackson
- 17 Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado
| | - Richard E Lee
- 18 Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Eric L Nuermberger
- 19 Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland.,20 Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Kenneth N Olivier
- 21 Laboratory of Chronic Airway Infection, Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, and
| | - Diane J Ordway
- 17 Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado
| | - D Rebecca Prevots
- 1 Epidemiology Unit, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases
| | - James C Sacchettini
- 22 Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas
| | - Max Salfinger
- 23 Mycobacteriology and Pharmacokinetics Laboratories, National Jewish Health, Denver, Colorado.,24 College of Public Health, University of South Florida, Tampa, Florida
| | - Christopher M Sassetti
- 25 Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, Massachusetts; and
| | - Christine F Sizemore
- 26 Tuberculosis, Leprosy, and other Mycobacterial Diseases Program, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland
| | - Kevin L Winthrop
- 15 OHSU-PSU School of Public Health and.,27 Division of Infectious Disease, Department of Medicine, Oregon Health & Science University, Portland, Oregon
| | - Adrian M Zelazny
- 28 Microbiology Service, Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, Maryland
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31
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Kim TH, Hanh BTB, Kim G, Lee DG, Park JW, Lee SE, Kim JS, Kim BS, Ryoo S, Jo EK, Jang J. Thiostrepton: A Novel Therapeutic Drug Candidate for Mycobacterium abscessus Infection. Molecules 2019; 24:molecules24244511. [PMID: 31835481 PMCID: PMC6943738 DOI: 10.3390/molecules24244511] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 12/06/2019] [Accepted: 12/06/2019] [Indexed: 02/03/2023] Open
Abstract
Mycobacterium abscessus is a rapid-growing, multidrug-resistant, non-tuberculous mycobacterial species responsible for a variety of human infections, such as cutaneous and pulmonary infections. M. abscessus infections are very difficult to eradicate due to the natural and acquired multidrug resistance profiles of M. abscessus. Thus, there is an urgent need for the development of effective drugs or regimens against M. abscessus infections. Here, we report the activity of a US Food and Drug Administration approved drug, thiostrepton, against M. abscessus. We found that thiostrepton significantly inhibited the growth of M. abscessus wild-type strains, subspecies, clinical isolates, and drug-resistant mutants in vitro and in macrophages. In addition, treatment of macrophages with thiostrepton significantly decreased proinflammatory cytokine production in a dose-dependent manner, suggesting an inhibitory effect of thiostrepton on inflammation induced during M. abscessus infection. We further showed that thiostrepton exhibits antimicrobial effects in vivo using a zebrafish model of M. abscessus infection.
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Affiliation(s)
- Tae Ho Kim
- Molecular Mechanisms of Antibiotics, Division of Life Science, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
- Division of Applied Life Science (BK21plus Program), Gyeongsang National University, Jinju 52828, Korea
| | - Bui Thi Bich Hanh
- Molecular Mechanisms of Antibiotics, Division of Life Science, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
- Division of Applied Life Science (BK21plus Program), Gyeongsang National University, Jinju 52828, Korea
| | - Guehye Kim
- Molecular Mechanisms of Antibiotics, Division of Life Science, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
- Division of Applied Life Science (BK21plus Program), Gyeongsang National University, Jinju 52828, Korea
| | - Da-Gyum Lee
- Molecular Mechanisms of Antibiotics, Division of Life Science, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
- Clinical Research Centre, Masan National Tuberculosis Hospital, Changwon 51755, Korea
| | - June-Woo Park
- Future Environmental Research Center, Korea Institute of Toxicology, Jinju 52834, Korea
- Human and Environmental Toxicology Program, Korea University of Science and Technology (UST), Daejeon 34113, Korea
| | - So Eui Lee
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 35015, Korea (E.-K.J.)
- Infection Control Convergence Research Center, Chungnam National University, Daejeon 35015, Korea
| | - Jae-Sung Kim
- Department of Bionano Technology, Hanyang University, Seoul 04763, Korea
| | - Byoung Soo Kim
- Department of Radiopharmaceutical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea
| | - Sungweon Ryoo
- Clinical Research Centre, Masan National Tuberculosis Hospital, Changwon 51755, Korea
| | - Eun-Kyeong Jo
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 35015, Korea (E.-K.J.)
- Infection Control Convergence Research Center, Chungnam National University, Daejeon 35015, Korea
| | - Jichan Jang
- Molecular Mechanisms of Antibiotics, Division of Life Science, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
- Division of Applied Life Science (BK21plus Program), Gyeongsang National University, Jinju 52828, Korea
- Correspondence: ; Tel.: +82-553-772-1368
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32
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Degiacomi G, Sammartino JC, Chiarelli LR, Riabova O, Makarov V, Pasca MR. Mycobacterium abscessus, an Emerging and Worrisome Pathogen among Cystic Fibrosis Patients. Int J Mol Sci 2019; 20:ijms20235868. [PMID: 31766758 PMCID: PMC6928860 DOI: 10.3390/ijms20235868] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/20/2019] [Accepted: 11/20/2019] [Indexed: 01/09/2023] Open
Abstract
Nontuberculous mycobacteria (NTM) have recently emerged as important pathogens among cystic fibrosis (CF) patients worldwide. Mycobacterium abscessus is becoming the most worrisome NTM in this cohort of patients and recent findings clarified why this pathogen is so prone to this disease. M. abscessus drug therapy takes up to 2 years and its failure causes an accelerated lung function decline. The M. abscessus colonization of lung alveoli begins with smooth strains producing glycopeptidolipids and biofilm, whilst in the invasive infection, "rough" mutants are responsible for the production of trehalose dimycolate, and consequently, cording formation. Human-to-human M. abscessus transmission was demonstrated among geographically separated CF patients by whole-genome sequencing of clinical isolates worldwide. Using a M. abscessus infected CF zebrafish model, it was demonstrated that CFTR (cystic fibrosis transmembrane conductance regulator) dysfunction seems to have a specific role in the immune control of M. abscessus infections only. This pathogen is also intrinsically resistant to many drugs, thanks to its physiology and to the acquisition of new mechanisms of drug resistance. Few new compounds or drug formulations active against M. abscessus are present in preclinical and clinical development, but recently alternative strategies have been investigated, such as phage therapy and the use of β-lactamase inhibitors.
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Affiliation(s)
- Giulia Degiacomi
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, 27100 Pavia, Italy; (G.D.); (J.C.S.); (L.R.C.)
| | - José Camilla Sammartino
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, 27100 Pavia, Italy; (G.D.); (J.C.S.); (L.R.C.)
- IUSS—University School for Advanced Studies, 27100 Pavia, Italy
| | - Laurent Roberto Chiarelli
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, 27100 Pavia, Italy; (G.D.); (J.C.S.); (L.R.C.)
| | - Olga Riabova
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.R.); (V.M.)
| | - Vadim Makarov
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.R.); (V.M.)
| | - Maria Rosalia Pasca
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, 27100 Pavia, Italy; (G.D.); (J.C.S.); (L.R.C.)
- Correspondence: ; Tel.: +39-0382-985576
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33
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1 H-Benzo[ d]Imidazole Derivatives Affect MmpL3 in Mycobacterium tuberculosis. Antimicrob Agents Chemother 2019; 63:AAC.00441-19. [PMID: 31332069 DOI: 10.1128/aac.00441-19] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 07/15/2019] [Indexed: 12/29/2022] Open
Abstract
1H-benzo[d]imidazole derivatives exhibit antitubercular activity in vitro at a nanomolar range of concentrations and are not toxic to human cells, but their mode of action remains unknown. Here, we showed that these compounds are active against intracellular Mycobacterium tuberculosis To identify their target, we selected drug-resistant M. tuberculosis mutants and then used whole-genome sequencing to unravel mutations in the essential mmpL3 gene, which encodes the integral membrane protein that catalyzes the export of trehalose monomycolate, a precursor of the mycobacterial outer membrane component trehalose dimycolate (TDM), as well as mycolic acids bound to arabinogalactan. The drug-resistant phenotype was also observed in the parental strain overexpressing the mmpL3 alleles carrying the mutations identified in the resistors. However, no cross-resistance was observed between 1H-benzo[d]imidazole derivatives and SQ109, another MmpL3 inhibitor, or other first-line antitubercular drugs. Metabolic labeling and quantitative thin-layer chromatography (TLC) analysis of radiolabeled lipids from M. tuberculosis cultures treated with the benzoimidazoles indicated an inhibition of trehalose dimycolate (TDM) synthesis, as well as reduced levels of mycolylated arabinogalactan, in agreement with the inhibition of MmpL3 activity. Overall, this study emphasizes the pronounced activity of 1H-benzo[d]imidazole derivatives in interfering with mycolic acid metabolism and their potential for therapeutic application in the fight against tuberculosis.
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Abstract
Free-living bacteria can assemble into multicellular structures called biofilms. Biofilms help bacteria tolerate multiple stresses, including antibiotics and the host immune system. Nontuberculous mycobacteria are a group of emerging opportunistic pathogens that utilize biofilms to adhere to household plumbing and showerheads and to avoid phagocytosis by host immune cells. Typically, bacteria regulate biofilm formation by controlling expression of adhesive structures to attach to surfaces and other bacterial cells. Mycobacteria harbor a unique cell wall built chiefly of long-chain mycolic acids that confers hydrophobicity and has been thought to cause constitutive aggregation in liquid media. Here we show that aggregation is instead a regulated process dictated by the balance of available carbon and nitrogen. Understanding that mycobacteria utilize metabolic cues to regulate the transition between planktonic and aggregated cells reveals an inroad to controlling biofilm formation through targeted therapeutics. Nontuberculous mycobacteria (NTM) are emerging opportunistic pathogens that colonize household water systems and cause chronic lung infections in susceptible patients. The ability of NTM to form surface-attached biofilms in the nonhost environment and corded aggregates in vivo is important to their ability to persist in both contexts. Underlying the development of these multicellular structures is the capacity of mycobacterial cells to adhere to one another. Unlike most other bacteria, NTM spontaneously and constitutively aggregate in vitro, hindering our ability to understand the transition between planktonic and aggregated cells. While culturing a model NTM, Mycobacterium smegmatis, in rich medium, we fortuitously discovered that planktonic cells accumulate after ∼3 days of growth. By providing selective pressure for bacteria that disperse earlier, we isolated a strain with two mutations in the oligopeptide permease operon (opp). A mutant lacking the opp operon (Δopp) disperses earlier than wild type (WT) due to a defect in nutrient uptake. Experiments with WT M. smegmatis revealed that growth as aggregates is favored when carbon is replete, but under conditions of low available carbon relative to available nitrogen, M. smegmatis grows as planktonic cells. By adjusting carbon and nitrogen sources in defined medium, we tuned the cellular C/N ratio such that M. smegmatis grows either as aggregates or as planktonic cells. C/N-mediated aggregation regulation is widespread among NTM with the possible exception of rough-colony Mycobacterium abscessus isolates. Altogether, we show that NTM aggregation is a controlled process that is governed by the relative availability of carbon and nitrogen for metabolism.
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Synergistic Efficacy of β-Lactam Combinations against Mycobacterium abscessus Pulmonary Infection in Mice. Antimicrob Agents Chemother 2019; 63:AAC.00614-19. [PMID: 31109979 DOI: 10.1128/aac.00614-19] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/11/2019] [Indexed: 01/31/2023] Open
Abstract
Mycobacterium abscessus is an emerging pathogen capable of causing invasive pulmonary infections in patients with chronic lung diseases. These infections are difficult to treat, necessitating prolonged multidrug therapy, which is further complicated by extensive intrinsic and acquired resistance exhibited by clinical M. abscessus isolates. Therefore, development of novel treatment regimens effective against drug-resistant strains is crucial. Prior studies have demonstrated synergistic efficacy of several β-lactams against M. abscessus in vitro; however, these combinations have never been tested in an animal model of M. abscessus pulmonary disease. We utilized a recently developed murine system of sustained M. abscessus lung infection delivered via an aerosol route to test the bactericidal efficacy of four novel dual β-lactam combinations and one β-lactam/β-lactamase inhibitor combination. All five of the novel combinations exhibited synergy and resulted in at least 6-log10 reductions in bacterial burden in the lungs of mice at 4 weeks compared to untreated controls (P = 0.038).
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36
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Sharma D, Misba L, Khan AU. Antibiotics versus biofilm: an emerging battleground in microbial communities. Antimicrob Resist Infect Control 2019; 8:76. [PMID: 31131107 PMCID: PMC6524306 DOI: 10.1186/s13756-019-0533-3] [Citation(s) in RCA: 707] [Impact Index Per Article: 141.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 04/30/2019] [Indexed: 12/25/2022] Open
Abstract
Biofilm is a complex structure of microbiome having different bacterial colonies or single type of cells in a group; adhere to the surface. These cells are embedded in extracellular polymeric substances, a matrix which is generally composed of eDNA, proteins and polysaccharides, showed high resistance to antibiotics. It is one of the major causes of infection persistence especially in nosocomial settings through indwelling devices. Quorum sensing plays an important role in regulating the biofilm formation. There are many approaches being used to control infections by suppressing its formation but CRISPR-CAS (gene editing technique) and photo dynamic therapy (PDT) are proposed to be used as therapeutic approaches to subside bacterial biofim infections, especially caused by deadly drug resistant bad bugs.
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Affiliation(s)
- Divakar Sharma
- Medical Microbiology and Molecular Biology Laboratory, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002 India
| | - Lama Misba
- Medical Microbiology and Molecular Biology Laboratory, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002 India
| | - Asad U. Khan
- Medical Microbiology and Molecular Biology Laboratory, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002 India
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37
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Le Moigne V, Bernut A, Cortès M, Viljoen A, Dupont C, Pawlik A, Gaillard JL, Misguich F, Crémazy F, Kremer L, Herrmann JL. Lsr2 Is an Important Determinant of Intracellular Growth and Virulence in Mycobacterium abscessus. Front Microbiol 2019; 10:905. [PMID: 31114557 PMCID: PMC6503116 DOI: 10.3389/fmicb.2019.00905] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 04/09/2019] [Indexed: 12/30/2022] Open
Abstract
Mycobacterium abscessus, a pathogen responsible for severe lung infections in cystic fibrosis patients, exhibits either smooth (S) or rough (R) morphotypes. The S-to-R transition correlates with inhibition of the synthesis and/or transport of glycopeptidolipids (GPLs) and is associated with an increase of pathogenicity in animal and human hosts. Lsr2 is a small nucleoid-associated protein highly conserved in mycobacteria, including M. abscessus, and is a functional homolog of the heat-stable nucleoid-structuring protein (H-NS). It is essential in Mycobacterium tuberculosis but not in the non-pathogenic model organism Mycobacterium smegmatis. It acts as a master transcriptional regulator of multiple genes involved in virulence and immunogenicity through binding to AT-rich genomic regions. Previous transcriptomic studies, confirmed here by quantitative PCR, showed increased expression of lsr2 (MAB_0545) in R morphotypes when compared to their S counterparts, suggesting a possible role of this protein in the virulence of the R form. This was addressed by generating lsr2 knock-out mutants in both S (Δlsr2-S) and R (Δlsr2-R) variants, demonstrating that this gene is dispensable for M. abscessus growth. We show that the wild-type S variant, Δlsr2-S and Δlsr2-R strains were more sensitive to H2O2 as compared to the wild-type R variant of M. abscessus. Importantly, virulence of the Lsr2 mutants was considerably diminished in cellular models (macrophage and amoeba) as well as in infected animals (mouse and zebrafish). Collectively, these results emphasize the importance of Lsr2 in M. abscessus virulence.
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Affiliation(s)
| | - Audrey Bernut
- UMR 9004, Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
| | | | - Albertus Viljoen
- UMR 9004, Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
| | - Christian Dupont
- UMR 9004, Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
| | - Alexandre Pawlik
- Unité de Pathogénomique Mycobactérienne, Institut Pasteur, Paris, France
| | - Jean-Louis Gaillard
- 2I, UVSQ, INSERM, Université Paris-Saclay, Versailles, France.,APHP, GHU PIFO, Hôpital Raymond-Poincaré - Hôpital Ambroise-Paré, Boulogne-Billancourt, France
| | | | | | - Laurent Kremer
- UMR 9004, Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France.,INSERM, Institut de Recherche en Infectiologie de Montpellier, Montpellier, France
| | - Jean-Louis Herrmann
- 2I, UVSQ, INSERM, Université Paris-Saclay, Versailles, France.,APHP, GHU PIFO, Hôpital Raymond-Poincaré - Hôpital Ambroise-Paré, Boulogne-Billancourt, France
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38
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Kim BR, Kim BJ, Kook YH, Kim BJ. Phagosome Escape of Rough Mycobacterium abscessus Strains in Murine Macrophage via Phagosomal Rupture Can Lead to Type I Interferon Production and Their Cell-To-Cell Spread. Front Immunol 2019; 10:125. [PMID: 30766538 PMCID: PMC6365470 DOI: 10.3389/fimmu.2019.00125] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 01/15/2019] [Indexed: 12/27/2022] Open
Abstract
Mycobacterium abscessus complex (MAB) is a rapidly growing mycobacterium(RGM) whose clinical significance as an emerging human pathogen has been increasing worldwide. It has two types of colony morphology, a smooth (S) type, producing high glycopeptidolipid (GPL) content, and a rough (R) type, which produces low levels of GPLs and is associated with increased virulence. However, the mechanism responsible for their difference in virulence is poorly known. By ultrastructural examination of murine macrophages infected, we found that MAB-R strains could replicate more actively in the macrophage phagosome than the S variants and that they could escape into cytosol via phagosomal rupture. The cytosolic access of MAB-R strains via phagosomal rupture led to enhanced Type I interferon (IFN) production and cell death, which resulted in their cell-to-cell spreading. This behavior can provide an additional niche for the survival of MAB-R strains. In addition, we found that their enhancement of cell death mediated cell spreading are dependent on Type I IFN signaling via comparison of wild-type and IFNAR1 knockout mice. In conclusion, our data indicated that a transition of MAB-S strains into MAB-R variants increased their virulence via enhanced Type I IFN production, which led to enhanced survival in infected macrophage via cell death mediated cell-to-cell spreading. This result provides not only a novel insight into the difference in virulence between MAB-R and -S variants but also hints to their treatment strategy.
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Affiliation(s)
- Bo-Ram Kim
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Byoung-Jun Kim
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Yoon-Hoh Kook
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Bum-Joon Kim
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
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39
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Ryan K, Byrd TF. Mycobacterium abscessus: Shapeshifter of the Mycobacterial World. Front Microbiol 2018; 9:2642. [PMID: 30443245 PMCID: PMC6221961 DOI: 10.3389/fmicb.2018.02642] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 10/16/2018] [Indexed: 01/23/2023] Open
Abstract
In this review we will focus on unique aspects of Mycobacterium abscessus (MABS) which we feel earn it the designation of "shapeshifter of the mycobacterial world." We will review its emergence as a distinct species, the recognition and description of MABS subspecies which are only now being clearly defined in terms of pathogenicity, its ability to exist in different forms favoring a saprophytic lifestyle or one more suitable to invasion of mammalian hosts, as well as current challenges in terms of antimicrobial therapy and future directions for research. One can see in the various phases of MABS, a species transitioning from a free living saprophyte to a host-adapted pathogen.
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Affiliation(s)
- Keenan Ryan
- Department of Pharmacy, University of New Mexico Hospital, Albuquerque, NM, United States
| | - Thomas F. Byrd
- Department of Medicine, The University of New Mexico School of Medicine, Albuquerque, NM, United States
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40
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Dubois V, Viljoen A, Laencina L, Le Moigne V, Bernut A, Dubar F, Blaise M, Gaillard JL, Guérardel Y, Kremer L, Herrmann JL, Girard-Misguich F. MmpL8 MAB controls Mycobacterium abscessus virulence and production of a previously unknown glycolipid family. Proc Natl Acad Sci U S A 2018; 115:E10147-E10156. [PMID: 30301802 PMCID: PMC6205491 DOI: 10.1073/pnas.1812984115] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Mycobacterium abscessus is a peculiar rapid-growing Mycobacterium (RGM) capable of surviving within eukaryotic cells thanks to an arsenal of virulence genes also found in slow-growing mycobacteria (SGM), such as Mycobacterium tuberculosis A screen based on the intracellular survival in amoebae and macrophages (MΦ) of an M. abscessus transposon mutant library revealed the important role of MAB_0855, a yet uncharacterized Mycobacterial membrane protein Large (MmpL). Large-scale comparisons with SGM and RGM genomes uncovered MmpL12 proteins as putative orthologs of MAB_0855 and a locus-scale synteny between the MAB_0855 and Mycobacterium chelonae mmpL8 loci. A KO mutant of the MAB_0855 gene, designated herein as mmpL8MAB , had impaired adhesion to MΦ and displayed a decreased intracellular viability. Despite retaining the ability to block phagosomal acidification, like the WT strain, the mmpL8MAB mutant was delayed in damaging the phagosomal membrane and in making contact with the cytosol. Virulence attenuation of the mutant was confirmed in vivo by impaired zebrafish killing and a diminished propensity to induce granuloma formation. The previously shown role of MmpL in lipid transport prompted us to investigate the potential lipid substrates of MmpL8MAB Systematic lipid analysis revealed that MmpL8MAB was required for the proper expression of a glycolipid entity, a glycosyl diacylated nonadecyl diol (GDND) alcohol comprising different combinations of oleic and stearic acids. This study shows the importance of MmpL8MAB in modifying interactions between the bacteria and phagocytic cells and in the production of a previously unknown glycolipid family.
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Affiliation(s)
- Violaine Dubois
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Albertus Viljoen
- CNRS UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, 34293 Montpellier, France
| | - Laura Laencina
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Vincent Le Moigne
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Audrey Bernut
- CNRS UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, 34293 Montpellier, France
| | - Faustine Dubar
- Université de Lille, CNRS UMR 8576, Unité de Glycobiologie Structurale et Fonctionnelle, 59000 Lille, France
| | - Mickaël Blaise
- CNRS UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, 34293 Montpellier, France
| | - Jean-Louis Gaillard
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
- Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Universitaire Paris Ile de France Ouest, Hôpital Raymond Poincaré, Hôpital Ambroise Paré, 92380 Garches, Boulogne Billancourt, France
| | - Yann Guérardel
- Université de Lille, CNRS UMR 8576, Unité de Glycobiologie Structurale et Fonctionnelle, 59000 Lille, France
| | - Laurent Kremer
- CNRS UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, 34293 Montpellier, France
- INSERM, Institut de Recherche en Infectiologie de Montpellier, 34293 Montpellier, France
| | - Jean-Louis Herrmann
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France;
- Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Universitaire Paris Ile de France Ouest, Hôpital Raymond Poincaré, Hôpital Ambroise Paré, 92380 Garches, Boulogne Billancourt, France
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41
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Ufimtseva EG, Eremeeva NI, Petrunina EM, Umpeleva TV, Bayborodin SI, Vakhrusheva DV, Skornyakov SN. Mycobacterium tuberculosis cording in alveolar macrophages of patients with pulmonary tuberculosis is likely associated with increased mycobacterial virulence. Tuberculosis (Edinb) 2018; 112:1-10. [PMID: 30205961 DOI: 10.1016/j.tube.2018.07.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 04/03/2018] [Accepted: 07/02/2018] [Indexed: 02/07/2023]
Abstract
Mycobacterium tuberculosis (Mtb) is an infectious agent that causes tuberculosis (TB) in humans. A study of the volume of Mtb population and the detection of Mtb virulence in the lungs of patients with pulmonary TB are of great importance for understanding the infectious process and the outcome of the disease. We analyzed the functional state of Mtb and their number in alveolar macrophages obtained from the resected lungs of patients with TB in ex vivo culture and determined that the number of Mtb, referred mainly to the Beijing genotype family (A0 and B0/W148 clusters), were significantly different in cells between different patients. Only single Mtb were found in alveolar macrophages of some patients, while Mtb were actively replicated in colonies in alveolar macrophages of other patients, including cord morphology of Mtb growth (the indicator of Mtb virulence). Our data demonstrated association between the formation of Mtb cording in alveolar macrophages of patients and increased virulence of Mtb from the lungs of these patients in guinea pig TB model. The find of cording formation by replicating Mtb in human alveolar macrophages may be used for preliminary quick estimation of increased Mtb virulence in individual patients with pulmonary TB.
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Affiliation(s)
- Elena G Ufimtseva
- The Research Institute of Biochemistry, Federal Research Center of Fundamental and Translation Medicine, 2 Timakova Street, 630117, Novosibirsk, Russia; Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, 50 XXII Partsyezda, 620039, Yekaterinburg, Russia.
| | - Natalya I Eremeeva
- Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, 50 XXII Partsyezda, 620039, Yekaterinburg, Russia.
| | - Ekaterina M Petrunina
- Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, 50 XXII Partsyezda, 620039, Yekaterinburg, Russia.
| | - Tatiana V Umpeleva
- Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, 50 XXII Partsyezda, 620039, Yekaterinburg, Russia.
| | - Sergey I Bayborodin
- The Federal Research Center Institute of Cytology and Genetics, 10 Lavrentyeva Prospect, 630090, Novosibirsk, Russia.
| | - Diana V Vakhrusheva
- Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, 50 XXII Partsyezda, 620039, Yekaterinburg, Russia.
| | - Sergey N Skornyakov
- Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, 50 XXII Partsyezda, 620039, Yekaterinburg, Russia.
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Gutiérrez AV, Viljoen A, Ghigo E, Herrmann JL, Kremer L. Glycopeptidolipids, a Double-Edged Sword of the Mycobacterium abscessus Complex. Front Microbiol 2018; 9:1145. [PMID: 29922253 PMCID: PMC5996870 DOI: 10.3389/fmicb.2018.01145] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/14/2018] [Indexed: 01/14/2023] Open
Abstract
Mycobacterium abscessus is a rapidly-growing species causing a diverse panel of clinical manifestations, ranging from cutaneous infections to severe respiratory disease. Its unique cell wall, contributing largely to drug resistance and to pathogenicity, comprises a vast panoply of complex lipids, among which the glycopeptidolipids (GPLs) have been the focus of intense research. These lipids fulfill various important functions, from sliding motility or biofilm formation to interaction with host cells and intramacrophage trafficking. Being highly immunogenic, the induction of a strong humoral response is likely to select for rough low-GPL producers. These, in contrast to the smooth high-GPL producers, display aggregative properties, which strongly impacts upon intracellular survival. A propensity to grow as extracellular cords allows these low-GPL producing bacilli to escape the innate immune defenses. Transitioning from high-GPL to low-GPL producers implicates mutations within genes involved in biosynthesis or transport of GPL. This leads to induction of an intense pro-inflammatory response and robust and lethal infections in animal models, explaining the presence of rough isolates in patients with decreased pulmonary functions. Herein, we will discuss how, thanks to the generation of defined GPL mutants and the development of appropriate cellular and animal models to study pathogenesis, GPL contribute to M. abscessus biology and physiopathology.
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Affiliation(s)
- Ana Victoria Gutiérrez
- Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, UMR 9004, Université de Montpellier, Montpellier, France.,CNRS, IRD 198, INSERM U1095, APHM, Institut Hospitalo-Universitaire Méditerranée Infection, UMR 7278, Aix-Marseille Université, Marseille, France
| | - Albertus Viljoen
- Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, UMR 9004, Université de Montpellier, Montpellier, France
| | - Eric Ghigo
- CNRS, Campus Joseph Aiguier, Marseille, France
| | | | - Laurent Kremer
- Centre National de la Recherche Scientifique, Institut de Recherche en Infectiologie de Montpellier, UMR 9004, Université de Montpellier, Montpellier, France.,INSERM, IRIM, Montpellier, France
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Viljoen A, Gutiérrez AV, Dupont C, Ghigo E, Kremer L. A Simple and Rapid Gene Disruption Strategy in Mycobacterium abscessus: On the Design and Application of Glycopeptidolipid Mutants. Front Cell Infect Microbiol 2018; 8:69. [PMID: 29594066 PMCID: PMC5861769 DOI: 10.3389/fcimb.2018.00069] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 02/27/2018] [Indexed: 12/12/2022] Open
Abstract
Little is known about the disease-causing genetic determinants that are used by Mycobacterium abscessus, increasingly acknowledged as an important emerging pathogen, notably in cystic fibrosis. The presence or absence of surface exposed glycopeptidolipids (GPL) conditions the smooth (S) or rough (R) M. abscessus subsp. abscessus (M. abscessus) variants, respectively, which are characterized by distinct infective programs. However, only a handful of successful gene knock-out and conditional mutants have been reported in M. abscessus, testifying that genetic manipulation of this mycobacterium is difficult. To facilitate gene disruption and generation of conditional mutants in M. abscessus, we have designed a one-step single cross-over system that allows the rapid and simple generation of such mutants. Cloning of as small as 300 bp of the target gene allows for efficient homologous recombination to occur without additional exogenous recombination-promoting factors. The presence of tdTomato on the plasmids allows easily sifting out the large background of mutants spontaneously resistant to antibiotics. Using this strategy in the S genetic background and the target gene mmpL4a, necessary for GPL synthesis and transport, nearly 100% of red fluorescent clones exhibited a rough morphotype and lost GPL on the surface, suggesting that most red fluorescent colonies obtained after transformation incorporated the plasmid through homologous recombination into the chromosome. This system was further exploited to generate another strain with reduced GPL levels to explore how the presence of these cell wall-associated glycolipids influences M. abscessus hydrophobicity as well as virulence in the zebrafish model of infection. This mutant exhibited a more pronounced killing phenotype in zebrafish embryos compared to its S progenitor and this effect correlated with the production of abscesses in the central nervous system. Overall, these results suggest that the near-complete absence of GPL on the bacterial surface is a necessary condition for optimal pathogenesis of this mycobacterium. They also suggest that GPL content affects hydrophobicity of M. abscessus, potentially altering the aerosol transmission, which is of particular importance from an epidemiological and clinical perspective.
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Affiliation(s)
- Albertus Viljoen
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
| | - Ana Victoria Gutiérrez
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
- Unité de Recherche Microbes, Evolution, Phylogeny and Infection (MEPHI), Institut Hospitalier Universitaire Méditerranée-Infection, Marseille, France
| | - Christian Dupont
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
| | - Eric Ghigo
- Centre National de la Recherche Scientifique, Marseille, France
| | - Laurent Kremer
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, Montpellier, France
- IRIM, 34293, Institut National de la Santé et de la Recherche Médicale, Montpellier, France
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Torraca V, Mostowy S. Zebrafish Infection: From Pathogenesis to Cell Biology. Trends Cell Biol 2018; 28:143-156. [PMID: 29173800 PMCID: PMC5777827 DOI: 10.1016/j.tcb.2017.10.002] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/06/2017] [Accepted: 10/09/2017] [Indexed: 12/11/2022]
Abstract
The study of host-pathogen interactions has illuminated fundamental research avenues in both infection and cell biology. Zebrafish (Danio rerio) larvae are genetically tractable, optically accessible, and present a fully functional innate immune system with macrophages and neutrophils that mimic their mammalian counterparts. A wide variety of pathogenic bacteria have been investigated using zebrafish models, providing unprecedented resolution of the cellular response to infection in vivo. In this review, we illustrate how zebrafish models have contributed to our understanding of cellular microbiology by providing an in vivo platform to study host-pathogen interactions from the single cell to whole animal level. We also highlight discoveries made from zebrafish infection that hold great promise for translation into novel therapies for humans.
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Affiliation(s)
- Vincenzo Torraca
- Section of Microbiology, MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - Serge Mostowy
- Section of Microbiology, MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK.
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45
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Laencina L, Dubois V, Le Moigne V, Viljoen A, Majlessi L, Pritchard J, Bernut A, Piel L, Roux AL, Gaillard JL, Lombard B, Loew D, Rubin EJ, Brosch R, Kremer L, Herrmann JL, Girard-Misguich F. Identification of genes required for Mycobacterium abscessus growth in vivo with a prominent role of the ESX-4 locus. Proc Natl Acad Sci U S A 2018; 115:E1002-E1011. [PMID: 29343644 PMCID: PMC5798338 DOI: 10.1073/pnas.1713195115] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Mycobacterium abscessus, a rapidly growing mycobacterium (RGM) and an opportunistic human pathogen, is responsible for a wide spectrum of clinical manifestations ranging from pulmonary to skin and soft tissue infections. This intracellular organism can resist the bactericidal defense mechanisms of amoebae and macrophages, an ability that has not been observed in other RGM. M. abscessus can up-regulate several virulence factors during transient infection of amoebae, thereby becoming more virulent in subsequent respiratory infections in mice. Here, we sought to identify the M. abscessus genes required for replication within amoebae. To this end, we constructed and screened a transposon (Tn) insertion library of an M. abscessus subspecies massiliense clinical isolate for attenuated clones. This approach identified five genes within the ESX-4 locus, which in M. abscessus encodes an ESX-4 type VII secretion system that exceptionally also includes the ESX conserved EccE component. To confirm the screening results and to get further insight into the contribution of ESX-4 to M. abscessus growth and survival in amoebae and macrophages, we generated a deletion mutant of eccB4 that encodes a core structural element of ESX-4. This mutant was less efficient at blocking phagosomal acidification than its parental strain. Importantly, and in contrast to the wild-type strain, it also failed to damage phagosomes and showed reduced signs of phagosome-to-cytosol contact, as demonstrated by a combination of cellular and immunological assays. This study attributes an unexpected and genuine biological role to the underexplored mycobacterial ESX-4 system and its substrates.
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Affiliation(s)
- Laura Laencina
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Violaine Dubois
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Vincent Le Moigne
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Albertus Viljoen
- Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, CNRS UMR 9004, 34293 Montpellier, France
| | - Laleh Majlessi
- Unité de Pathogénomique Mycobactérienne, Institut Pasteur, 75015 Paris, France
| | - Justin Pritchard
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA 02115
| | - Audrey Bernut
- Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, CNRS UMR 9004, 34293 Montpellier, France
| | - Laura Piel
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
| | - Anne-Laure Roux
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
- Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Ile de France Ouest, Ambroise Paré, Boulogne and Raymond Poincaré, 92380 Garches, France
| | - Jean-Louis Gaillard
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France
- Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Ile de France Ouest, Ambroise Paré, Boulogne and Raymond Poincaré, 92380 Garches, France
| | - Bérengère Lombard
- Laboratoire de spectrométrie de masse protéomique, Institut Curie, Paris Science and Letters Research University, 75248 Paris, France
| | - Damarys Loew
- Laboratoire de spectrométrie de masse protéomique, Institut Curie, Paris Science and Letters Research University, 75248 Paris, France
| | - Eric J Rubin
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA 02115
| | - Roland Brosch
- Unité de Pathogénomique Mycobactérienne, Institut Pasteur, 75015 Paris, France
| | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier, Université de Montpellier, CNRS UMR 9004, 34293 Montpellier, France
- INSERM, Institut de Recherche en Infectiologie de Montpellier, 34293 Montpellier, France
| | - Jean-Louis Herrmann
- Université de Versailles Saint Quentin en Yvelines, INSERM UMR1173, 78000 Versailles, France;
- Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Ile de France Ouest, Ambroise Paré, Boulogne and Raymond Poincaré, 92380 Garches, France
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Rominski A, Selchow P, Becker K, Brülle JK, Dal Molin M, Sander P. Elucidation of Mycobacterium abscessus aminoglycoside and capreomycin resistance by targeted deletion of three putative resistance genes. J Antimicrob Chemother 2018; 72:2191-2200. [PMID: 28486671 DOI: 10.1093/jac/dkx125] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/03/2017] [Indexed: 12/20/2022] Open
Abstract
Objectives Mycobacterium abscessus is innately resistant to a variety of drugs thereby limiting therapeutic options. Bacterial resistance to aminoglycosides (AGs) is conferred mainly by AG-modifying enzymes, which often have overlapping activities. Several putative AG-modifying enzymes are encoded in the genome of M. abscessus . The aim of this study was to investigate the molecular basis underlying AG resistance in M. abscessus . Methods M. abscessus deletion mutants deficient in one of three genes potentially involved in AG resistance, aac(2 ' ) , eis1 and eis2 , were generated by targeted gene inactivation, as were combinatorial double and triple deletion mutants. MICs were determined to study susceptibility to a variety of AG drugs and to capreomycin. Results Deletion of aac(2 ' ) increased susceptibility of M. abscessus to kanamycin B, tobramycin, dibekacin and gentamicin C. Deletion of eis2 increased susceptibility to capreomycin, hygromycin B, amikacin and kanamycin B. Deletion of eis1 did not affect drug susceptibility. Equally low MICs of apramycin, arbekacin, isepamicin and kanamycin A for WT and mutant strains indicate that these drugs are not inactivated by either AAC(2 ' ) or Eis enzymes. Conclusions M. abscessus expresses two distinct AG resistance determinants, AAC(2 ' ) and Eis2, which confer clinically relevant drug resistance.
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Affiliation(s)
- Anna Rominski
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Petra Selchow
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Katja Becker
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Juliane K Brülle
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Michael Dal Molin
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Peter Sander
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland.,Nationales Zentrum für Mykobakterien, Gloriastrasse 30/32, 8006 Zürich, Switzerland
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Abstract
The genus Mycobacterium includes human pathogens (Mycobacterium tuberculosis and Mycobacterium leprae) and environmental organisms known as non-tuberculous mycobacteria (NTM) that, when associated with biomaterials and chronic disease, can cause human infections. A common pathogenic factor of mycobacteria is the formation of biofilms. Various molecules are involved in this process, including glycopeptidolipids, shorter-chain mycolic acids, and GroEL1 chaperone. Nutrients, ions, and carbon sources influence bacterial behavior and have a regulatory role in biofilm formation. The ultrastructure of mycobacterial biofilms can be studied by confocal laser scanning microscopy, a technique that reveals different phenotypic characteristics. Cording is associated with NTM pathogenicity, and is also considered an important property of M. tuberculosis strains. Mycobacterial biofilms are more resistant to environmental aggressions and disinfectants than the planktonic form. Biofilm-forming mycobacteria have been reported in many environmental studies, especially in water systems. NTM cause respiratory disease in patients with underlying diseases, such as old tuberculosis scars, bronchiectasis, and cystic fibrosis. Pathogens can be either slowly growing mycobacteria, such as Mycobacterium avium complex, or rapidly growing species, such as Mycobacterium abscessus. Another important biofilm-related group of infections are those associated with biomaterials, and in this setting the most frequently isolated organisms are rapidly growing mycobacteria. M. tuberculosis can develop a biofilm which plays a role in the process of casseous necrosis and cavity formation in lung tissue. M. tuberculosis also develops biofilms on clinical biomaterials. Biofilm development is an important factor for antimicrobial resistance, as it affords protection against antibiotics that are normally active against the same bacteria in the planktonic state. This antibiotic resistance of biofilm-forming microorganisms may result in treatment failure, and biofilms have to be physically eradicated to resolve the infection. New strategies with potential antibiofilm molecules that improve treatment efficacy have been developed. A novel antibiofilm approach focuses on Methylobacterium sp. An understanding of biofilm is essential for the appropriate management of patients with many NTM diseases, while the recent discovery of M. tuberculosis biofilms opens a new research field.
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Affiliation(s)
- Jaime Esteban
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz, Madrid, Spain
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Bedaquiline Inhibits the ATP Synthase in Mycobacterium abscessus and Is Effective in Infected Zebrafish. Antimicrob Agents Chemother 2017; 61:AAC.01225-17. [PMID: 28807917 DOI: 10.1128/aac.01225-17] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/08/2017] [Indexed: 12/24/2022] Open
Abstract
Pulmonary infections caused by Mycobacterium abscessus are emerging as a global threat, especially in cystic fibrosis patients. Further intensifying the concern of M. abscessus infection is the recent evidence of human-to-human transmission of the infection. M. abscessus is a naturally multidrug-resistant fast-growing pathogen for which pharmacological options are limited. Repurposing antitubercular drugs represents an attractive option for the development of chemotherapeutic alternatives against M. abscessus infections. Bedaquiline (BDQ), an ATP synthase inhibitor, has recently been approved for the treatment of multidrug-resistant tuberculosis. Herein, we show that BDQ has a very low MIC against a vast panel of clinical isolates. Despite being bacteriostatic in vitro, BDQ was highly efficacious in a zebrafish model of M. abscessus infection. Remarkably, a very short period of treatment was sufficient to protect the infected larvae from M. abscessus-induced killing. This was corroborated with reduced numbers of abscesses and cords, considered to be major pathophysiological signs in infected zebrafish. Mode-of-action studies revealed that BDQ triggered a rapid depletion of ATP in M. abscessusin vitro, consistent with the drug targeting the FoF1 ATP synthase. Importantly, despite a failure to select in vitro for spontaneous mutants that are highly resistant to BDQ, the transfer of single nucleotide polymorphisms leading to D29V or A64P substitutions in atpE conferred high resistance, thus resolving the target of BDQ in M. abscessus Overall, this study indicates that BDQ is active against M. abscessusin vitro and in vivo and should be considered for clinical use against the difficult-to-manage M. abscessus pulmonary infections.
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Llorens-Fons M, Pérez-Trujillo M, Julián E, Brambilla C, Alcaide F, Byrd TF, Luquin M. Trehalose Polyphleates, External Cell Wall Lipids in Mycobacterium abscessus, Are Associated with the Formation of Clumps with Cording Morphology, Which Have Been Associated with Virulence. Front Microbiol 2017; 8:1402. [PMID: 28790995 PMCID: PMC5524727 DOI: 10.3389/fmicb.2017.01402] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 07/11/2017] [Indexed: 12/28/2022] Open
Abstract
Mycobacterium abscessus is a reemerging pathogen that causes pulmonary diseases similar to tuberculosis, which is caused by Mycobacterium tuberculosis. When grown in agar medium, M. abscessus strains generate rough (R) or smooth colonies (S). R morphotypes are more virulent than S morphotypes. In searching for the virulence factors responsible for this difference, R morphotypes have been found to form large aggregates (clumps) that, after being phagocytozed, result in macrophage death. Furthermore, the aggregates released to the extracellular space by damaged macrophages grow, forming unphagocytosable structures that resemble cords. In contrast, bacilli of the S morphotype, which do not form aggregates, do not damage macrophages after phagocytosis and do not form cords. Cording has also been related to the virulence of M. tuberculosis. In this species, the presence of mycolic acids and surface-exposed cell wall lipids has been correlated with the formation of cords. The objective of this work was to study the roles of the surface-exposed cell wall lipids and mycolic acids in the formation of cords in M. abscessus. A comparative study of the pattern and structure of mycolic acids was performed on R (cording) and S (non-cording) morphotypes derived from the same parent strains, and no differences were observed between morphotypes. Furthermore, cords formed by R morphotypes were disrupted with petroleum ether (PE), and the extracted lipids were analyzed by thin layer chromatography, nuclear magnetic resonance spectroscopy and mass spectrometry. Substantial amounts of trehalose polyphleates (TPP) were recovered as major lipids from PE extracts, and images obtained by transmission electron microscopy suggested that these lipids are localized to the external surfaces of cords and R bacilli. The structure of M. abscessus TPP was revealed to be similar to those previously described in Mycobacterium smegmatis. Although the exact role of TPP is unknown, our results demonstrated that TPP are not toxic by themselves and have a function in the formation of clumps and cords in M. abscessus, thus playing an important role in the pathogenesis of this species.
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Affiliation(s)
- Marta Llorens-Fons
- Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de BarcelonaBarcelona, Spain
| | - Míriam Pérez-Trujillo
- Servei de Ressonància Magnètica Nuclear and Departament de Química, Universitat Autònoma de BarcelonaBarcelona, Spain
| | - Esther Julián
- Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de BarcelonaBarcelona, Spain
| | - Cecilia Brambilla
- Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de BarcelonaBarcelona, Spain
| | - Fernando Alcaide
- Servei de Microbiologia, Hospital Universitari de Bellvitge-IDIBELL, Universitat de BarcelonaBarcelona, Spain
| | - Thomas F. Byrd
- The University of New Mexico School of Medicine, AlbuquerqueNM, United States
| | - Marina Luquin
- Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de BarcelonaBarcelona, Spain
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50
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Kozikowski AP, Onajole OK, Stec J, Dupont C, Viljoen A, Richard M, Chaira T, Lun S, Bishai W, Raj VS, Ordway D, Kremer L. Targeting Mycolic Acid Transport by Indole-2-carboxamides for the Treatment of Mycobacterium abscessus Infections. J Med Chem 2017; 60:5876-5888. [PMID: 28574259 DOI: 10.1021/acs.jmedchem.7b00582] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Mycobacterium abscessus is a fast-growing, multidrug-resistant organism that has emerged as a clinically significant pathogen in cystic fibrosis (CF) patients. The intrinsic resistance of M. abscessus to most commonly available antibiotics seriously restricts chemotherapeutic options. Herein, we report the potent activity of a series of indolecarboxamides against M. abscessus. The lead compounds, 6 and 12, exhibited strong activity in vitro against a wide panel of M. abscessus isolates and in infected macrophages. High resistance levels to the indolecarboxamides appear to be associated with an A309P mutation in the mycolic acid transporter MmpL3. Biochemical analyses demonstrated that while de novo mycolic acid synthesis remained unaffected, the indolecarboxamides strongly inhibited the transport of trehalose monomycolate, resulting in the loss of trehalose dimycolate production and abrogating mycolylation of arabinogalactan. Our data introduce a hereto unexploited chemical structure class active against M. abscessus infections with promising translational development possibilities for the treatment of CF patients.
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Affiliation(s)
- Alan P Kozikowski
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Oluseye K Onajole
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , 833 South Wood Street, Chicago, Illinois 60612, United States.,Department of Biological, Chemical and Physical Sciences, Roosevelt University , 425 South Wabash Avenue, Chicago, Illinois 60605, United States
| | - Jozef Stec
- Department of Pharmaceutical Sciences, College of Pharmacy, Chicago State University , 9501 South King Drive, Chicago, Illinois 60628, United States.,Department of Pharmaceutical Sciences, College of Pharmacy, Marshall B. Ketchum University , 2575 Yorba Linda Boulevard, Fullerton, California 92831, United States
| | - Christian Dupont
- Institut de Recherche en Infectiologie (IRIM), CNRS, UMR 9004, Université de Montpellier , Montpellier Cedex 5 34 293, France
| | - Albertus Viljoen
- Institut de Recherche en Infectiologie (IRIM), CNRS, UMR 9004, Université de Montpellier , Montpellier Cedex 5 34 293, France
| | - Matthias Richard
- Institut de Recherche en Infectiologie (IRIM), CNRS, UMR 9004, Université de Montpellier , Montpellier Cedex 5 34 293, France
| | - Tridib Chaira
- Centre for Drug Design Discovery and Development (C4D), SRM University, Delhi-NCR , Rajiv Gandhi Education City, Sonepat 131 029, Haryana India.,Daiichi Sankyo India Pharma Private Limited , Sector 18, Gurgaon 122 015, Haryana India
| | - Shichun Lun
- JHU Center for TB Research, Johns Hopkins School of Medicine , 1550 Orleans Street, Baltimore, Maryland 21231-1001, United States
| | - William Bishai
- JHU Center for TB Research, Johns Hopkins School of Medicine , 1550 Orleans Street, Baltimore, Maryland 21231-1001, United States
| | - V Samuel Raj
- Centre for Drug Design Discovery and Development (C4D), SRM University, Delhi-NCR , Rajiv Gandhi Education City, Sonepat 131 029, Haryana India
| | - Diane Ordway
- Department of Microbiology, Immunology & Pathology, Mycobacteria Research Laboratory, Colorado State University , Fort Collins, Colorado 80523 United States
| | - Laurent Kremer
- Institut de Recherche en Infectiologie (IRIM), CNRS, UMR 9004, Université de Montpellier , Montpellier Cedex 5 34 293, France.,IRIM, INSERM , 34293 Montpellier, France
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