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Liu Y, Kaffah N, Pandor S, Sartain MJ, Larrouy-Maumus G. Ion mobility mass spectrometry for the study of mycobacterial mycolic acids. Sci Rep 2023; 13:10390. [PMID: 37369807 DOI: 10.1038/s41598-023-37641-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 06/25/2023] [Indexed: 06/29/2023] Open
Abstract
Lipids are highly structurally diverse molecules involved in a wide variety of biological processes. The involvement of lipids is even more pronounced in mycobacteria, including the human pathogen Mycobacterium tuberculosis, which produces a highly complex and diverse set of lipids in the cell envelope. These lipids include mycolic acids, which are among the longest fatty acids in nature and can contain up to 90 carbon atoms. Mycolic acids are ubiquitously found in mycobacteria and are alpha branched and beta hydroxylated lipids. Discrete modifications, such as alpha, alpha', epoxy, methoxy, keto, and carboxy, characterize mycolic acids at the species level. Here, we used high precision ion mobility-mass spectrometry to build a database including 206 mass-resolved collision cross sections (CCSs) of mycolic acids originating from the strict human pathogen M. tuberculosis, the opportunistic strains M. abscessus, M. marinum and M. avium, and the nonpathogenic strain M. smegmatis. Primary differences between the mycolic acid profiles could be observed between mycobacterial species. Acyl tail length and modifications were the primary structural descriptors determining CCS magnitude. As a resource for researchers, this work provides a detailed catalogue of the mass-resolved collision cross sections for mycolic acids along with a workflow to generate and analyse the dataset generated.
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Affiliation(s)
- Yi Liu
- Centre for Bacterial Resistance Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Nadhira Kaffah
- Centre for Bacterial Resistance Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, SW7 2AZ, UK
| | | | | | - Gerald Larrouy-Maumus
- Centre for Bacterial Resistance Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, SW7 2AZ, UK.
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2
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Weng Y, Shepherd D, Liu Y, Krishnan N, Robertson BD, Platt N, Larrouy-Maumus G, Platt FM. Inhibition of the Niemann-Pick C1 protein is a conserved feature of multiple strains of pathogenic mycobacteria. Nat Commun 2022; 13:5320. [PMID: 36085278 PMCID: PMC9463166 DOI: 10.1038/s41467-022-32553-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 08/04/2022] [Indexed: 11/12/2022] Open
Abstract
Mycobacterium tuberculosis (Mtb) survives and replicates within host macrophages (MΦ) and subverts multiple antimicrobial defense mechanisms. Previously, we reported that lipids shed by pathogenic mycobacteria inhibit NPC1, the lysosomal membrane protein deficient in the lysosomal storage disorder Niemann-Pick disease type C (NPC). Inhibition of NPC1 leads to a drop in lysosomal calcium levels, blocking phagosome-lysosome fusion leading to mycobacterial survival. We speculated that the production of specific cell wall lipid(s) that inhibit NPC1 could have been a critical step in the evolution of pathogenicity. We therefore investigated whether lipid extracts from clinical Mtb strains from multiple Mtb lineages, Mtb complex (MTBC) members and non-tubercular mycobacteria (NTM) inhibit the NPC pathway. We report that inhibition of the NPC pathway was present in all clinical isolates from Mtb lineages 1, 2, 3 and 4, Mycobacterium bovis and the NTM, Mycobacterium abscessus and Mycobacterium avium. However, lipid extract from Mycobacterium canettii, which is considered to resemble the common ancestor of the MTBC did not inhibit the NPC1 pathway. We conclude that the evolution of NPC1 inhibitory mycobacterial cell wall lipids evolved early and post divergence from Mycobacterium canettii-related mycobacteria and that this activity contributes significantly to the promotion of disease.
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Affiliation(s)
- Yuzhe Weng
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Dawn Shepherd
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Yi Liu
- MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, UK
| | - Nitya Krishnan
- MRC Centre for Molecular Bacteriology and Infection, Department of Infectious Disease, Imperial College London, Flowers Building, London, SW7 2AZ, UK
| | - Brian D Robertson
- MRC Centre for Molecular Bacteriology and Infection, Department of Infectious Disease, Imperial College London, Flowers Building, London, SW7 2AZ, UK
| | - Nick Platt
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Gerald Larrouy-Maumus
- MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, UK
| | - Frances M Platt
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK.
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3
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Frankfater C, Fujiwara H, Williams SJ, Minnaard A, Hsu FF. Characterization of Mycobacterium tuberculosis Mycolic Acids by Multiple-Stage Linear Ion-Trap Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:149-159. [PMID: 34842433 DOI: 10.1021/jasms.1c00310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Mycobacterium tuberculosis (Mtb) cells are known to synthesize very long chain (C60-90) structurally complex mycolic acids with various functional groups. In this study, we applied linear ion-trap (LIT) multiple-stage mass spectrometry (MSn), combined with high-resolution mass spectrometry to study the mechanisms underlying the fragmentation processes of mycolic acid standards desorbed as lithiated adduct ions by ESI. This is followed by structural characterization of a Mtb mycolic acid family (Bovine strain). Using the insight fragmentation processes gained from the study, we are able to achieve a near complete characterization of the whole mycolic acid family, revealing the identity of the α-alkyl chain, the location of the functional groups including methyl, methoxy, and keto groups along the meroaldehyde chain in each lipid species. This study showcased the power of LIT MSn toward structural determination of complex lipids in a mixture, which would be otherwise very difficult to define using other analytical techniques.
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Affiliation(s)
- Cheryl Frankfater
- Mass Spectrometry Resource, Division of Endocrinology, Metabolism, and Lipid Research, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110 United States
| | - Hideji Fujiwara
- Mass Spectrometry Resource, Division of Endocrinology, Metabolism, and Lipid Research, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110 United States
| | - Spencer J Williams
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Adriaan Minnaard
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Fong-Fu Hsu
- Mass Spectrometry Resource, Division of Endocrinology, Metabolism, and Lipid Research, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110 United States
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4
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Sakallioglu IT, Maroli AS, Leite ADL, Powers R. A reversed phase ultra-high-performance liquid chromatography-data independent mass spectrometry method for the rapid identification of mycobacterial lipids. J Chromatogr A 2021; 1662:462739. [PMID: 34929571 DOI: 10.1016/j.chroma.2021.462739] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/30/2021] [Accepted: 12/05/2021] [Indexed: 11/17/2022]
Abstract
A rapid reversed-phase ultra-high-performance liquid chromatography-high resolution mass spectrometry based mycobacterial lipidomics approach is described. This method enables the separation of various lipid classes including lipids specific to mycobacterial, such as methoxy mycolic acid and α-mycolic acid. Lipid separation occurs during a relatively short runtime of 14 min on a charged surface hybrid C18 column. A high-resolution quadrupole-time of flight mass spectrometer and a data independent acquisition mode allowed for the simultaneous acquisition of the full scan and collision induced dissociation fragmentation. The proposed method provides lipid detection results equivalent to or better than existing methods, but with a faster throughput and an overall higher sensitivity. The reversed-phase ultra-high-performance liquid chromatography-high resolution mass spectrometry method was shown to obtain structural information for lipids extracted from Mycobacterium smegmatis, but the method is applicable to the analysis of lipids from various bacterial and mammalian cell lines.
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Affiliation(s)
- Isin T Sakallioglu
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA
| | - Amith S Maroli
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA; Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA
| | - Aline De Lima Leite
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA; Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA
| | - Robert Powers
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA; Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln NE 68588-0304, USA.
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5
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Solntceva V, Kostrzewa M, Larrouy-Maumus G. Detection of Species-Specific Lipids by Routine MALDI TOF Mass Spectrometry to Unlock the Challenges of Microbial Identification and Antimicrobial Susceptibility Testing. Front Cell Infect Microbiol 2021; 10:621452. [PMID: 33634037 PMCID: PMC7902069 DOI: 10.3389/fcimb.2020.621452] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/18/2020] [Indexed: 12/16/2022] Open
Abstract
MALDI-TOF mass spectrometry has revolutionized clinical microbiology diagnostics by delivering accurate, fast, and reliable identification of microorganisms. It is conventionally based on the detection of intracellular molecules, mainly ribosomal proteins, for identification at the species-level and/or genus-level. Nevertheless, for some microorganisms (e.g., for mycobacteria) extensive protocols are necessary in order to extract intracellular proteins, and in some cases a protein-based approach cannot provide sufficient evidence to accurately identify the microorganisms within the same genus (e.g., Shigella sp. vs E. coli and the species of the M. tuberculosis complex). Consequently lipids, along with proteins are also molecules of interest. Lipids are ubiquitous, but their structural diversity delivers complementary information to the conventional protein-based clinical microbiology matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) based approaches currently used. Lipid modifications, such as the ones found on lipid A related to polymyxin resistance in Gram-negative pathogens (e.g., phosphoethanolamine and aminoarabinose), not only play a role in the detection of microorganisms by routine MALDI-TOF mass spectrometry but can also be used as a read-out of drug susceptibility. In this review, we will demonstrate that in combination with proteins, lipids are a game-changer in both the rapid detection of pathogens and the determination of their drug susceptibility using routine MALDI-TOF mass spectrometry systems.
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Affiliation(s)
- Vera Solntceva
- MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | | | - Gerald Larrouy-Maumus
- MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
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6
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Brugnera MF, Miyata M, Zocolo GJ, Gonçalves Tessaro LL, Fujimura Leite CQ, Boldrin Zanoni MV. A promising technology based on photoelectrocatalysis against Mycobacterium tuberculosis in water disinfection. ENVIRONMENTAL TECHNOLOGY 2021; 42:743-752. [PMID: 31311444 DOI: 10.1080/09593330.2019.1645213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Mycobacterium tuberculosis is highly infectious, persistent and has been detected in more than one quarter of the world's population. It is notoriously resistant to sterilization and disinfection procedures, largely due to an unusual hydrophobic cell wall and effective defense mechanisms against oxidative stress. This work shows an effective method to reduce M. tuberculosis quantity in water by using Ti/TiO2 nanotubes electrodes bare and coated with Ag nanoparticles by using photoelectrocatalytic oxidation process. The results have indicated 99.999% of inactivation of a solution spiked with standard and resistant strains of 1×104 CFU mL-1 M. tuberculosis after 5 min of treatment at Ti/TiO2 photoanode in 0.05 mol L-1 Na2SO4 (pH 6) under applied potential of + 1.5 V versus Ag/AgCl and UV irradiation. The mycobacteria degradation was monitored by dissolved total organic carbon (TOC) removal, carbohydrate release, chromatography coupled to mass spectroscopy measurements and it is slightly superior to photocatalysis and photolysis processes. All the results corroborated with the complete inactivation and degradation of the byproducts generated during cell lysis.
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Affiliation(s)
| | - Marcelo Miyata
- Department of Biological Science, Faculty of Pharmaceutical Science of Araraquara, UNESP, Araraquara, Brazil
| | - Guilherme Julião Zocolo
- Department of Analytical Chemistry, Institute of Chemistry of Araraquara, UNESP, Araraquara, Brazil
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"Mycobacterium mephinesia", a Mycobacterium terrae complex species of clinical interest isolated in French Polynesia. Sci Rep 2019; 9:11169. [PMID: 31371776 PMCID: PMC6671966 DOI: 10.1038/s41598-019-47674-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 07/15/2019] [Indexed: 12/04/2022] Open
Abstract
A 59-year-old tobacco smoker male with chronic bronchitis living in Taravao, French Polynesia, Pacific, presented with a two-year growing nodule in the middle lobe of the right lung. A guided bronchoalveolar lavage inoculated onto Löwenstein-Jensen medium yielded colonies of a rapidly-growing non-chromogenic mycobacterium designed as isolate P7213. The isolate could not be identified using routine matrix-assisted laser desorption ionization-time of flight-mass spectrometry and phenotypic and probe-hybridization techniques and yielded 100% and 97% sequence similarity with the respective 16S rRNA and rpoB gene sequences of Mycobacterium virginiense in the Mycobacterium terrae complex. Electron microscopy showed a 1.15 µm long and 0.38 µm large bacillus which was in vitro susceptible to rifampicin, rifabutin, ethambutol, isoniazid, doxycycline and kanamycin. Its 4,511,948-bp draft genome exhibited a 67.6% G + C content with 4,153 coding-protein genes and 87 predicted RNA genes. Genome sequence-derived DNA-DNA hybridization, OrthoANI and pangenome analysis confirmed isolate P7213 was representative of a new species in the M. terrae complex. We named this species “Mycobacterium mephinesia”.
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8
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Blevins MS, Klein DR, Brodbelt JS. Localization of Cyclopropane Modifications in Bacterial Lipids via 213 nm Ultraviolet Photodissociation Mass Spectrometry. Anal Chem 2019; 91:6820-6828. [PMID: 31026154 DOI: 10.1021/acs.analchem.9b01038] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Subtle structural features in bacterial lipids such as unsaturation elements can have vast biological implications. Cyclopropane rings have been correlated with tolerance to a number of adverse conditions in bacterial phospholipids. They have also been shown to play a major role in Mycobacterium tuberculosis ( M. tuberculosis or Mtb) pathogenesis as they occur in mycolic acids (MAs) in the mycobacterial cell. Traditional collisional activation methods allow elucidation of basic structural features of lipids but fail to reveal the presence and position of cyclopropane rings. Here, we employ 213 nm ultraviolet photodissociation mass spectrometry (UVPD-MS) for structural characterization of cyclopropane rings in bacterial phospholipids and MAs. Upon UVPD, dual cross-ring C-C cleavages on both sides of the cyclopropane ring are observed for cyclopropyl lipids, resulting in diagnostic pairs of fragment ions spaced 14 Da apart, thus enabling cyclopropane localization. These diagnostic pairs of ions corresponding to dual cross-ring cleavage are observed in both negative and positive ion modes and afford localization of multiple cyclopropane rings within a single lipid. This method was integrated with liquid chromatography (LC) for LC/UVPD-MS analysis of cyclopropyl glycerophospholipids in Escherichia coli ( E. coli) and for analysis of MAs in Mycobacterium bovis ( M. bovis) and M. tuberculosis lipid extracts.
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Affiliation(s)
- Molly S Blevins
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Dustin R Klein
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Jennifer S Brodbelt
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
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9
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Bouzid F, Osman DA, Baptiste E, Delerce J, Hassan MO, Arreh WI, Levasseur A, Garnotel E, Drancourt M. Pulmonary Isolation of Multidrug resistant "Mycobacterium simulans" and Mycobacterium tuberculosis from a patient in the Horn of Africa. Sci Rep 2018; 8:15341. [PMID: 30367075 PMCID: PMC6203708 DOI: 10.1038/s41598-018-33737-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 07/30/2018] [Indexed: 11/22/2022] Open
Abstract
In low-income countries of the Horn of Africa, pulmonary infections are usually considered as tuberculosis, which diagnosis relies on clinical data and positive microscopic observation. This strategy allows non-tuberculous mycobacteria to escape detection, facilitating their emergence in populations. A non-tuberculous mycobacterium strain FB-527 was unexpectedly cultured from the sputum of a Djiboutian patient otherwise diagnosed with multi-drug resistant (MDR) tuberculosis. The sequencing of the rpoB and 16S rRNA genes showed that the isolate was identical to strain FI-09026 previously named "Mycobacterium simulans" and reported only once from a Somali patient. Strain FB-527 mimicked Mycobacterium tuberculosis colonies and enzymatic profile using API ZYM strip and was in vitro resistant to rifampicin and isoniazid. Isolation of two MDR mycobacteria complicated the diagnosis and therapeutic management of the patient. We here report on the complete description of strain FB-527 and strain FI-09026 including genome sequencing, finalizing the description of the proposed new species "Mycobacterium simulans".
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Affiliation(s)
- Fériel Bouzid
- Aix Marseille Univ, IRD, MEPHI, IHU Méditerranée Infection, Marseille, France
| | - Djaltou Aboubaker Osman
- Centre d'Études et de Recherche de Djibouti (CERD), Institut de Recherche Médicinale (IRM), Djibouti, Djibouti
| | - Emeline Baptiste
- Aix Marseille Univ, IRD, MEPHI, IHU Méditerranée Infection, Marseille, France
| | - Jeremy Delerce
- Aix Marseille Univ, IRD, MEPHI, IHU Méditerranée Infection, Marseille, France
| | | | | | - Anthony Levasseur
- Aix Marseille Univ, IRD, MEPHI, IHU Méditerranée Infection, Marseille, France
| | - Eric Garnotel
- Hôpital d'instruction des armées Alphonse Laveran, Marseille, France
| | - Michel Drancourt
- Aix Marseille Univ, IRD, MEPHI, IHU Méditerranée Infection, Marseille, France.
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10
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Vincent AT, Nyongesa S, Morneau I, Reed MB, Tocheva EI, Veyrier FJ. The Mycobacterial Cell Envelope: A Relict From the Past or the Result of Recent Evolution? Front Microbiol 2018; 9:2341. [PMID: 30369911 PMCID: PMC6194230 DOI: 10.3389/fmicb.2018.02341] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/12/2018] [Indexed: 12/27/2022] Open
Abstract
Mycobacteria are well known for their taxonomic diversity, their impact on global health, and for their atypical cell wall and envelope. In addition to a cytoplasmic membrane and a peptidoglycan layer, the cell envelope of members of the order Corynebacteriales, which include Mycobacterium tuberculosis, also have an arabinogalactan layer connecting the peptidoglycan to an outer membrane, the so-called “mycomembrane.” This unusual cell envelope composition of mycobacteria is of prime importance for several physiological processes such as protection from external stresses and for virulence. Although there have been recent breakthroughs in the elucidation of the composition and organization of this cell envelope, its evolutionary origin remains a mystery. In this perspectives article, the characteristics of the cell envelope of mycobacteria with respect to other actinobacteria will be dissected through a molecular evolution framework in order to provide a panoramic view of the evolutionary pathways that appear to be at the origin of this unique cell envelope. In combination with a robust molecular phylogeny, we have assembled a gene matrix based on the presence or absence of key determinants of cell envelope biogenesis in the Actinobacteria phylum. We present several evolutionary scenarios regarding the origin of the mycomembrane. In light of the data presented here, we also propose a novel alternative hypothesis whereby the stepwise acquisition of core enzymatic functions may have allowed the sequential remodeling of the external cell membrane during the evolution of Actinobacteria and has led to the unique mycomembrane of slow-growing mycobacteria as we know it today.
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Affiliation(s)
- Antony T Vincent
- INRS-Institut Armand-Frappier, Bacterial Symbionts Evolution, Laval, QC, Canada.,McGill International TB Centre, Montreal, QC, Canada
| | - Sammy Nyongesa
- INRS-Institut Armand-Frappier, Bacterial Symbionts Evolution, Laval, QC, Canada
| | - Isabelle Morneau
- Faculty of Dentistry, Université de Montréal, Montreal, QC, Canada
| | - Michael B Reed
- McGill International TB Centre, Montreal, QC, Canada.,Department of Medicine, McGill University, Montreal, QC, Canada.,Infectious Diseases and Immunity in Global Health Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Elitza I Tocheva
- Faculty of Dentistry, Université de Montréal, Montreal, QC, Canada
| | - Frederic J Veyrier
- INRS-Institut Armand-Frappier, Bacterial Symbionts Evolution, Laval, QC, Canada.,McGill International TB Centre, Montreal, QC, Canada
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11
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Druszczynska M, Wawrocki S, Szewczyk R, Rudnicka W. Mycobacteria-derived biomarkers for tuberculosis diagnosis. Indian J Med Res 2018; 146:700-707. [PMID: 29664027 PMCID: PMC5926340 DOI: 10.4103/ijmr.ijmr_1441_16] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Tuberculosis (TB) remains an escalating problem worldwide. The current diagnostic methods do not always guarantee reliable diagnosis. TB treatment is a time-consuming process that requires the use of several chemotherapeutics, to which mycobacteria are becoming increasingly resistant. This article focuses on the potential utility of biomarkers of mycobacterial origin with potential implications for TB diagnosis. Properly standardized indicators could become new diagnostic tools, improving and streamlining the identification of Mycobacterium tuberculosis infection and the implementation of appropriate therapy. These markers can also potentially provide a quick confirmation of effectiveness of new anti-mycobacterial drugs and TB vaccines, leading to a possible application in practice.
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Affiliation(s)
- Magdalena Druszczynska
- Department of Immunology & Infectious Biology, Faculty of Biology & Environmental Protection, Institute of Microbiology, Biotechnology & Immunology, University of Lodz, Lodz, Poland
| | - Sebastian Wawrocki
- Department of Immunology & Infectious Biology, Faculty of Biology & Environmental Protection, Institute of Microbiology, Biotechnology & Immunology, University of Lodz, Lodz, Poland
| | - Rafal Szewczyk
- Department of Industrial Microbiology & Biotechnology, Faculty of Biology & Environmental Protection, Institute of Microbiology, Biotechnology & Immunology, University of Lodz, Lodz, Poland
| | - Wieslawa Rudnicka
- Department of Immunology & Infectious Biology, Faculty of Biology & Environmental Protection, Institute of Microbiology, Biotechnology & Immunology, University of Lodz, Lodz, Poland
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12
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Bouam A, Armstrong N, Levasseur A, Drancourt M. Mycobacterium terramassiliense, Mycobacterium rhizamassiliense and Mycobacterium numidiamassiliense sp. nov., three new Mycobacterium simiae complex species cultured from plant roots. Sci Rep 2018; 8:9309. [PMID: 29915369 PMCID: PMC6006331 DOI: 10.1038/s41598-018-27629-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 06/05/2018] [Indexed: 12/04/2022] Open
Abstract
Three slowly growing mycobacteria named strain AB308, strain AB215 and strain AB57 were isolated from the tomato plant roots. The 16S rRNA and rpoB gene sequence analyses suggested that each strain was representative of one hitherto unidentified slowly-growing Mycobacterium species of the Mycobacterium simiae complex. Genome sequencing indicated that each strain contained one chromosome of 6.015-6.029 Mbp. A total of 1,197, 1,239 and 1,175 proteins were found to be associated with virulence and 107, 76 and 82 proteins were associated with toxin/antitoxin systems for strains AB308, AB215 and AB57, respectively. The three genomes encode for secondary metabolites, with 38, 33 and 46 genes found to be associated with polyketide synthases/non-ribosomal peptide synthases and nine, seven and ten genes encoding for bacteriocins, respectively. The genome of strain AB308 encodes for one questionable prophage and three incomplete prophages, while only incomplete prophages were predicted in AB215 and AB57 genomes. Genetic and genomic data indicate that strains AB308, AB215 and AB57 are each representative of a new Mycobacterium species that we respectively named Mycobacterium terramassiliense, Mycobacterium numidiamassiliense and Mycobacterium rhizamassiliense.
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Affiliation(s)
- A Bouam
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France
| | - N Armstrong
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France
| | - A Levasseur
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France
| | - M Drancourt
- Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France.
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13
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Nieto R LM, Mehaffy C, Islam MN, Fitzgerald B, Belisle J, Prenni J, Dobos K. Biochemical Characterization of Isoniazid-resistant Mycobacterium tuberculosis: Can the Analysis of Clonal Strains Reveal Novel Targetable Pathways? Mol Cell Proteomics 2018; 17:1685-1701. [PMID: 29844232 DOI: 10.1074/mcp.ra118.000821] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Indexed: 01/01/2023] Open
Abstract
Tuberculosis (TB) continues to be an important public health threat worldwide, due in part to drug resistant Mycobacterium tuberculosis (Mtb) strains. The United States recently reported a shortage of isoniazid (INH), which could drive higher INH resistance rates. Changes in the Mtb proteome before and after acquisition of INH resistance in a clean genetic background remain understudied and may elucidate alternate drug targets. Here, we focused on Mtb clonal strains to characterize the consequences of INH resistance on mycobacterial metabolism. Proteomic analysis was conducted by liquid-chromatography tandem mass spectrometry (LC-MS/MS) of cellular and secreted fractions, followed by a normalized spectral counting (NSAF) analysis (data are available via ProteomeXchange with identifier PXD009549). Two different Mtb clonal pairs representing a specific genetic lineage (one clinical and one generated in the laboratory) but sharing a katG mutation associated with INH resistance, were used in our analysis. Overall, we found 26 Mtb proteins with altered abundances after acquisition of INH resistance across both Mtb genetic lineages studied. These proteins were involved in ATP synthesis, lipid metabolism, regulatory events, and virulence, detoxification, and adaptation processes. Proteomic findings were validated by Western blotting analyses whenever possible. Mycolic acid (MA) analysis through LC/MS in the clonal Mtb pairs did not reveal a common trend in the alteration of these fatty acids across both INHr strains but revealed a significant reduction in levels of the two more abundant α-MA features in the clinical INHr strain. Interestingly, the clinical clonal pair demonstrated more variation in the abundance of the proteins involved in the FAS II pathway. Together, the proteomic and lipidomic data highlight the identification of potential drug targets such as alternative lipid biosynthetic pathways that may be exploited to combat clinically relevant Mtb INHr strains.
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Affiliation(s)
| | | | - M Nurul Islam
- From the ‡Department of Microbiology, Immunology and Pathology
| | | | - John Belisle
- From the ‡Department of Microbiology, Immunology and Pathology
| | - Jessica Prenni
- §Proteomics and Metabolomics Facility, Colorado State University, Fort Collins, CO
| | - Karen Dobos
- From the ‡Department of Microbiology, Immunology and Pathology,
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14
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Abstract
Four slowly growing mycobacteria isolates were isolated from the respiratory tract and soft tissue biopsies collected in four unrelated patients in Iran. Conventional phenotypic tests indicated that these four isolates were identical to Mycobacterium lentiflavum while 16S rRNA gene sequencing yielded a unique sequence separated from that of M. lentiflavum. One representative strain AFP-003T was characterized as comprising a 6,121,237-bp chromosome (66.24% guanosine-cytosine content) encoding for 5,758 protein-coding genes, 50 tRNA and one complete rRNA operon. A total of 2,876 proteins were found to be associated with the mobilome, including 195 phage proteins. A total of 1,235 proteins were found to be associated with virulence and 96 with toxin/antitoxin systems. The genome of AFP-003T has the genetic potential to produce secondary metabolites, with 39 genes found to be associated with polyketide synthases and non-ribosomal peptide syntases and 11 genes encoding for bacteriocins. Two regions encoding putative prophages and three OriC regions separated by the dnaA gene were predicted. Strain AFP-003T genome exhibits 86% average nucleotide identity with Mycobacterium genavense genome. Genetic and genomic data indicate that strain AFP-003T is representative of a novel Mycobacterium species that we named Mycobacterium ahvazicum, the nineteenth species of the expanding Mycobacterium simiae complex.
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15
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Crick PJ, Guan XL. Lipid metabolism in mycobacteria--Insights using mass spectrometry-based lipidomics. Biochim Biophys Acta Mol Cell Biol Lipids 2015; 1861:60-67. [PMID: 26515252 DOI: 10.1016/j.bbalip.2015.10.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 10/14/2015] [Accepted: 10/23/2015] [Indexed: 11/18/2022]
Abstract
Diseases including tuberculosis and leprosy are caused by species of the Mycobacterium genus and are a huge burden on global health, aggravated by the emergence of drug resistant strains. Mycobacteria have a high lipid content and complex lipid profile including several unique classes of lipid. Recent years have seen a growth in research focused on lipid structures, metabolism and biological functions driven by advances in mass spectrometry techniques and instrumentation, particularly the use of electrospray ionization. Here we review the contributions of lipidomics towards the advancement of our knowledge of lipid metabolism in mycobacterial species.
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Affiliation(s)
- Peter J Crick
- Swiss Tropical and Public Health Institute, CH-4051 Basel, Switzerland; University of Basel, CH-4000 Basel, Switzerland
| | - Xue Li Guan
- Swiss Tropical and Public Health Institute, CH-4051 Basel, Switzerland; University of Basel, CH-4000 Basel, Switzerland; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.
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16
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Jyoti MA, Zerin T, Kim TH, Hwang TS, Jang WS, Nam KW, Song HY. In vitro effect of ursolic acid on the inhibition of Mycobacterium tuberculosis and its cell wall mycolic acid. Pulm Pharmacol Ther 2015; 33:17-24. [PMID: 26021818 DOI: 10.1016/j.pupt.2015.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 05/15/2015] [Accepted: 05/17/2015] [Indexed: 01/21/2023]
Abstract
Mycobacterium tuberculosis is a dangerous intracellular pathogen. In order to protect against mycobacterium infection, novel agents with anti-mycobacterial activity should be given emergency priority for evaluation. Ursolic acid (UA), a plant triterpenoid, shows promising bioactivities, including anti-mycobacterial potency. In this study, the action of UA against Mycobacterium tuberculosis H37Ra was evaluated, and the inhibitory concentration was found to range between 10 and 20 μg/ml in a resazurin assay and MGIT 960 instrument. The total mycolic acid in UA-treated H37Ra was detected and compared with INH-treated and non-treated bacterium by LC-MS/MS. Quantitative LC-MS/MS data confirmed that both UA and INH decreased mycolic acid biosynthesis in a dose-dependent manner. Thin-layer chromatogram (TLC) analysis showed that all mycolic acid subtypes were affected by UA treatment in the wild type but not in strains resistant to UA. Electron microscopy images also confirmed that UA treatment affected both H37Ra cell and intracellular content of H37Ra. Altogether, these data confirmed the promise of the inhibitory action of UA in mycolic acid, which might further delineate the mechanistic pathway of mycobacterial inhibition by UA.
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Affiliation(s)
- Md Anirban Jyoti
- Department of Microbiology and Immunology, Soonchunhyang University, 8 Soonchuhyang 2-gil, Cheonan si 330-721, Republic of Korea
| | - Tamanna Zerin
- Department of Microbiology and Immunology, Soonchunhyang University, 8 Soonchuhyang 2-gil, Cheonan si 330-721, Republic of Korea
| | - Tae-Hyun Kim
- Bioresourses Regional Innovation Center, Soonchunhyang University, Asan, Republic of Korea
| | - Tae-Seon Hwang
- Department of Microbiology and Immunology, Soonchunhyang University, 8 Soonchuhyang 2-gil, Cheonan si 330-721, Republic of Korea
| | - Woong Sik Jang
- Department of Microbiology and Immunology, Soonchunhyang University, 8 Soonchuhyang 2-gil, Cheonan si 330-721, Republic of Korea
| | - Kung-Woo Nam
- Department of Chemistry, Soonchunhyang University, 22 Soonchunhyang-ro, Sinchangmyeon, Asan, Chungcheonam 336-745, Republic of Korea
| | - Ho-Yeon Song
- Department of Microbiology and Immunology, Soonchunhyang University, 8 Soonchuhyang 2-gil, Cheonan si 330-721, Republic of Korea.
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17
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Teramoto K, Suga M, Sato T, Wada T, Yamamoto A, Fujiwara N. Characterization of Mycolic Acids in Total Fatty Acid Methyl Ester Fractions from Mycobacterium Species by High Resolution MALDI-TOFMS. ACTA ACUST UNITED AC 2015; 4:A0035. [PMID: 26819906 DOI: 10.5702/massspectrometry.a0035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 02/13/2015] [Indexed: 11/23/2022]
Abstract
Mycolic acids (MAs) are characteristic components of bacteria in the suborder Corynebacterineae, such as Mycobacterium. MAs are categorized into subclasses based on their functional bases (cyclopropane ring, methoxy, keto, and epoxy group). Since MAs have heterogeneity among bacterial species, analyzing of MAs are required in the chemotaxonomic field. However, their structural analysis is not easy because of their long carbon-chain lengths and several functional groups. In this study, total fatty acid (FA) methyl ester (ME) fraction of M. tuberculosis H37Rv was analyzed by matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry (TOFMS) with a spiral ion trajectory (MALDI spiral-TOFMS). The distributions of carbon-chain length and their relative peak intensities were confirmed with those obtained by analysis of each subclass fraction which was separated from total FA ME fraction using thin-layer chromatography (TLC). The observed major peaks were reliably assigned as MAs owing to the high mass accuracy (error<3 ppm). The types of MA subclasses, their distributions of carbon-chain lengths, their relative peak intensities, and the ratio of even- and odd-numbered carbon-chain MAs for the total FA ME fraction were consistent with those of MA subclass fractions. To visualize whole MAs, contour maps of relative peak intensities for whole MAs were created. The contour maps indicated the MA subclasses and their distributions of carbon-chains with relative peak intensities at a glance. Our proposed method allows simple characterization in a short time and thus enables the analysis of large numbers of samples, and it would contribute to the chemotaxonomy.
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Affiliation(s)
| | - Mitsuo Suga
- Advanced and Fundamental Technology Center, JEOL Ltd
| | | | - Takayuki Wada
- Department of International Health, Institute of Tropical Medicine, Nagasaki University
| | - Atsushi Yamamoto
- Osaka City Institute of Public Health and Environmental Sciences
| | - Nagatoshi Fujiwara
- Department of Food and Nutrition, Faculty of Contemporary Human Life Science, Tezukayama University
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18
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Mycolic Acids as Markers of Osseous Tuberculosis in the Neolithic Skeleton from Kujawy Region (Central Poland). ANTHROPOLOGICAL REVIEW 2014. [DOI: 10.2478/anre-2014-0012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
The subject of analysis is the male skeleton from a double burial of the Globular Amphora Culture, derived from the Neolithic site at Brześć Kujawski in Kujawy region (central Poland). Within the spine of the individual advanced lesions are observed (destruction of the vertebral bodies, symptoms of the periostitis in the thoracic region) which are characteristic of skeletal tuberculosis. To check whether the observed morphological changes resulted from infection with Mycobacterium tuberculosis (M.tb), the bone material was tested positively for the presence of mycolic acids, the specific components of the cell wall of pathogenic M.tb bacilli, by mass spectrometry.
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19
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Zhang R, Long Y, He W, Hao X, Liu J. Application status of MALDI-TOF mass spectrometry in the identification and drug resistance of Mycobacterium tuberculosis. J Thorac Dis 2014; 6:512-6. [PMID: 24822112 DOI: 10.3978/j.issn.2072-1439.2014.02.19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 02/26/2014] [Indexed: 01/12/2023]
Abstract
Characterizing Mycobacterium tuberculosis (MTB) and detecting its drug resistance are challenging for clinical laboratory diagnosis, largely due to its slow growth and higher rate of genetic mutation. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a revolutionary technique for the routine identification of microorganisms. In this review, we discuss the application status of mass spectrometry in the identification and drug resistance of M. tuberculosis.
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Affiliation(s)
- Ruixue Zhang
- 1 Institute of Clinical Laboratory Medicine, 2 Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Yin Long
- 1 Institute of Clinical Laboratory Medicine, 2 Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Wenfang He
- 1 Institute of Clinical Laboratory Medicine, 2 Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Xiaoke Hao
- 1 Institute of Clinical Laboratory Medicine, 2 Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Jiayun Liu
- 1 Institute of Clinical Laboratory Medicine, 2 Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
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20
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Groenewald W, Baird MS, Verschoor JA, Minnikin DE, Croft AK. Differential spontaneous folding of mycolic acids from Mycobacterium tuberculosis. Chem Phys Lipids 2014; 180:15-22. [DOI: 10.1016/j.chemphyslip.2013.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/06/2013] [Accepted: 12/09/2013] [Indexed: 10/25/2022]
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21
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Brugnera MF, Miyata M, Zocolo GJ, Leite CQF, Zanoni MVB. A photoelectrocatalytic process that disinfects water contaminated with Mycobacterium kansasii and Mycobacterium avium. WATER RESEARCH 2013; 47:6596-605. [PMID: 24079966 DOI: 10.1016/j.watres.2013.08.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 08/21/2013] [Accepted: 08/24/2013] [Indexed: 05/03/2023]
Abstract
Nontuberculous mycobacteria are resistant to conventional water treatment; indeed, they have been recovered from a wide variety of environmental sources. Here, we applied the photoelectrocatalytic technique using a Ti/TiO2-Ag photoanode to inactivate mycobacteria. For a mycobacteria population of 5 × 10(8) CFU mL(-1), we achieved 99.9 and 99.8% inactivation of Mycobacterium kansasii and Mycobacterium avium with rate constant of 6.2 × 10(-3) and 4.2 × 10(-3) min(-1), respectively, after 240 min. We compared the proposed method with the photolytic and photocatalytic methods. Using a mycobacteria population of 7.5 × 10(4) CFU mL(-1), the proposed Ti/TiO2-Ag photoanode elicited total mycobacteria inactivation within 3 min of treatment; the presence of Ag nanoparticles in the electrode provided 1.5 larger degradation rate constant as compared with the Ti/TiO2 anode (1.75 × 10(-2) for M. kansassi and 1.98 × 10(-2) for M. avium). We monitored the degradation of the metabolites released during cellular lysis by TOC removal, sugar release, chromatography, and mass spectrometry measurements; photoelectrocatalysis and Ti/TiO2-Ag photoanodes furnished the best results.
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Affiliation(s)
- Michelle Fernanda Brugnera
- Department of Analytical Chemistry, Institute of Chemistry of Araraquara, UNESP, Rua Francisco Degni, 55 - Bairro Quitandinha, 14800-900 Araraquara, SP, Brazil.
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22
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Rapid method for Mycobacterium tuberculosis identification using electrospray ionization tandem mass spectrometry analysis of mycolic acids. Diagn Microbiol Infect Dis 2013; 76:298-305. [DOI: 10.1016/j.diagmicrobio.2013.03.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 03/15/2013] [Accepted: 03/26/2013] [Indexed: 11/21/2022]
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23
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Balogun MO, Huws EH, Sirhan MM, Saleh AD, Dulayymi JRA, Pilcher L, Verschoor JA, Baird MS. Thiol modified mycolic acids. Chem Phys Lipids 2013; 172-173:40-55. [DOI: 10.1016/j.chemphyslip.2013.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 03/21/2013] [Accepted: 03/23/2013] [Indexed: 11/30/2022]
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24
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Chan CE, Zhao BZ, Cazenave-Gassiot A, Pang SW, Bendt AK, Wenk MR, MacAry PA, Hanson BJ. Novel phage display-derived mycolic acid-specific antibodies with potential for tuberculosis diagnosis. J Lipid Res 2013; 54:2924-32. [PMID: 23797850 DOI: 10.1194/jlr.d036137] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Tuberculosis is a major cause of mortality and morbidity due to infectious disease. However, current clinical diagnostic methodologies such as PCR, sputum culture, or smear microscopy are not ideal. Antibody-based assays are a suitable alternative but require specific antibodies against a suitable biomarker. Mycolic acid, which has been found in patient sputum samples and comprises a large portion of the mycobacterial cell wall, is an ideal target. However, generating anti-lipid antibodies using traditional hybridoma methodologies is challenging and has limited the exploitation of this lipid as a diagnostic marker. We describe here the isolation and characterization of four anti-mycolic acid antibodies from a nonimmune antibody phage display library that can detect mycolic acids down to a limit of 4.5ng. All antibodies were specific for the methoxy subclass of mycolic acid with weak binding for α mycolic acid and did not show any binding to closely related lipids or other Mycobacterium tuberculosis (Mtb) derived lipids. We also determined the clinical utility of these antibodies based on their limit of detection for mycobacteria colony forming units (CFU). In combination with an optimized alkaline hydrolysis method for rapid lipid extraction, these antibodies can detect 10(5) CFU of Mycobacterium bovis BCG, a close relative of Mtb and therefore represent a novel approach for the development of diagnostic assays for lipid biomarkers.
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Affiliation(s)
- Conrad E Chan
- Department of Microbiology, National University of Singapore, Singapore, 117545 Singapore
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25
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Inactivation and disposal of by-products from Mycobacterium smegmatis by photoelectrocatalytic oxidation using Ti/TiO2-Ag nanotube electrodes. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.116] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Kolouchová I, Schreiberová O, Masák J, Sigler K, Řezanka T. Structural analysis of mycolic acids from phenol-degrading strain of Rhodococcus erythropolis by liquid chromatography–tandem mass spectrometry. Folia Microbiol (Praha) 2012; 57:473-83. [DOI: 10.1007/s12223-012-0156-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 04/24/2012] [Indexed: 11/30/2022]
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27
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Layre E, Sweet L, Hong S, Madigan CA, Desjardins D, Young DC, Cheng TY, Annand JW, Kim K, Shamputa IC, McConnell MJ, Debono CA, Behar SM, Minnaard AJ, Murray M, Barry CE, Matsunaga I, Moody DB. A comparative lipidomics platform for chemotaxonomic analysis of Mycobacterium tuberculosis. ACTA ACUST UNITED AC 2012; 18:1537-49. [PMID: 22195556 DOI: 10.1016/j.chembiol.2011.10.013] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/18/2011] [Accepted: 10/03/2011] [Indexed: 11/28/2022]
Abstract
The lipidic envelope of Mycobacterium tuberculosis promotes virulence in many ways, so we developed a lipidomics platform for a broad survey of cell walls. Here we report two new databases (MycoMass, MycoMap), 30 lipid fine maps, and mass spectrometry datasets that comprise a static lipidome. Further, by rapidly regenerating lipidomic datasets during biological processes, comparative lipidomics provides statistically valid, organism-wide comparisons that broadly assess lipid changes during infection or among clinical strains of mycobacteria. Using stringent data filters, we tracked more than 5,000 molecular features in parallel with few or no false-positive molecular discoveries. The low error rates allowed chemotaxonomic analyses of mycobacteria, which describe the extent of chemical change in each strain and identified particular strain-specific molecules for use as biomarkers.
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Affiliation(s)
- Emilie Layre
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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28
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Laboratory diagnosis of tuberculosis in resource-poor countries: challenges and opportunities. Clin Microbiol Rev 2011; 24:314-50. [PMID: 21482728 DOI: 10.1128/cmr.00059-10] [Citation(s) in RCA: 298] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
With an estimated 9.4 million new cases globally, tuberculosis (TB) continues to be a major public health concern. Eighty percent of all cases worldwide occur in 22 high-burden, mainly resource-poor settings. This devastating impact of tuberculosis on vulnerable populations is also driven by its deadly synergy with HIV. Therefore, building capacity and enhancing universal access to rapid and accurate laboratory diagnostics are necessary to control TB and HIV-TB coinfections in resource-limited countries. The present review describes several new and established methods as well as the issues and challenges associated with implementing quality tuberculosis laboratory services in such countries. Recently, the WHO has endorsed some of these novel methods, and they have been made available at discounted prices for procurement by the public health sector of high-burden countries. In addition, international and national laboratory partners and donors are currently evaluating other new diagnostics that will allow further and more rapid testing in point-of-care settings. While some techniques are simple, others have complex requirements, and therefore, it is important to carefully determine how to link these new tests and incorporate them within a country's national diagnostic algorithm. Finally, the successful implementation of these methods is dependent on key partnerships in the international laboratory community and ensuring that adequate quality assurance programs are inherent in each country's laboratory network.
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29
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Bhamidi S, Scherman MS, Jones V, Crick DC, Belisle JT, Brennan PJ, McNeil MR. Detailed structural and quantitative analysis reveals the spatial organization of the cell walls of in vivo grown Mycobacterium leprae and in vitro grown Mycobacterium tuberculosis. J Biol Chem 2011; 286:23168-77. [PMID: 21555513 DOI: 10.1074/jbc.m110.210534] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The cell wall of mycobacteria consists of an outer membrane, analogous to that of gram-negative bacteria, attached to the peptidoglycan (PG) via a connecting polysaccharide arabinogalactan (AG). Although the primary structure of these components is fairly well deciphered, issues such as the coverage of the PG layer by covalently attached mycolates in the outer membrane and the spatial details of the mycolic acid attachment to the arabinan have remained unknown. It is also not understood how these components work together to lead to the classical acid-fast staining of mycobacteria. Because the majority of Mycobacterium tuberculosis bacteria in established experimental animal infections are acid-fast negative, clearly cell wall changes are occurring. To address both the spatial properties of mycobacterial cell walls and to begin to study the differences between bacteria grown in animals and cultures, the cell walls of Mycobacterium leprae grown in armadillos was characterized and compared with that of M. tuberculosis grown in culture. Most fundamentally, it was determined that the cell wall of M. leprae contained significantly more mycolic acids attached to PG than that of in vitro grown M. tuberculosis (mycolate:PG ratios of 21:10 versus 16:10, respectively). In keeping with this difference, more arabinogalactan (AG) molecules, linking the mycolic acids to PG, were found. Differences in the structures of the AG were also found; the AG of M. leprae is smaller than that of M. tuberculosis, although the same basic structural motifs are retained.
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Affiliation(s)
- Suresh Bhamidi
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado 80523, USA
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30
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Hsu FF, Soehl K, Turk J, Haas A. Characterization of mycolic acids from the pathogen Rhodococcus equi by tandem mass spectrometry with electrospray ionization. Anal Biochem 2011; 409:112-22. [PMID: 20946862 PMCID: PMC3006067 DOI: 10.1016/j.ab.2010.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Revised: 10/01/2010] [Accepted: 10/01/2010] [Indexed: 10/19/2022]
Abstract
We describe a simple tandem mass spectrometric approach toward structural characterization of mycolic acids, the long-chain α-alkyl-β-hydroxy fatty acids unique to mycobacteria and related taxa. On collisionally activated dissociation in a linear ion trap or tandem quadrupole mass spectrometer, the [M-H](-) ions of mycolic acid generated by electrospray ionization undergo dissociation to eliminate the meroaldehyde residue, leading to formation of carboxylate anions containing α-alkyl chains. The structural information from these fragment ions affords structural assignment of the mycolic acids, including the lengths of the meromycolate chain and the α-branch. This study revealed that the mycolic acids isolated from pathogenic Rhodococcus equi 103 contained a series of homologous ions having C(30) to C(50) chain with 0-2 double bonds. The α-branch ranged from C(10) to C(18) with 0 to 1 double bond, in which 16:0 and 14:0 are the most prominent, whereas the meromycolate chain ranged from C(14) to C(34) with 0 to 2 double bonds. The major molecular species consisted of more than 3 isomers that differ by the lengths of the α-branch or meromycolate chain, and up to 10 isobaric isomers were identified for some minor ions. We also employed tandem quadrupole mass spectrometry with precursor ion and neutral loss scans for profiling mycolic acid with specific structure in mixtures. The tandem spectra obtained from precursor ion scans of m/z 255 (16:0-carboxylate anion) and m/z 227 (14:0-carboxylate anion) may provide a simple specific means for classification of Rhodococci species, whereas tandem spectra from neutral loss of meroaldehyde residue scans provided a simple approach to reveal the mycolic acid molecules with specific meromycolate chain in mixtures.
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Affiliation(s)
- Fong-Fu Hsu
- Mass Spectrometry Resource, Division of Endocrinology, Diabetes, Metabolism, and Lipid Research, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
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31
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Rapid identification of mycobacterial whole cells in solid and liquid culture media by matrix-assisted laser desorption ionization-time of flight mass spectrometry. J Clin Microbiol 2010; 48:4481-6. [PMID: 20943874 DOI: 10.1128/jcm.01397-10] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Mycobacterial identification is based on several methods: conventional biochemical tests that require several weeks for accurate identification, and molecular tools that are now routinely used. However, these techniques are expensive and time-consuming. In this study, an alternative method was developed using matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). This approach allows a characteristic mass spectral fingerprint to be obtained from whole inactivated mycobacterial cells. We engineered a strategy based on specific profiles in order to identify the most clinically relevant species of mycobacteria. To validate the mycobacterial database, a total of 311 strains belonging to 31 distinct species and 4 species complexes grown in Löwenstein-Jensen (LJ) and liquid (mycobacterium growth indicator tube [MGIT]) media were analyzed. No extraction step was required. Correct identifications were obtained for 97% of strains from LJ and 77% from MGIT media. No misidentification was noted. Our results, based on a very simple protocol, suggest that this system may represent a serious alternative for clinical laboratories to identify mycobacterial species.
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32
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Mycobacterium bovis at the animal–human interface: A problem, or not? Vet Microbiol 2010; 140:371-81. [DOI: 10.1016/j.vetmic.2009.08.029] [Citation(s) in RCA: 197] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 08/21/2009] [Accepted: 08/27/2009] [Indexed: 11/30/2022]
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