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González-Escalada A, Rebollo MJ, Barrios Payan J, Hernández-Pando R, García MJ. Detection of Mycobacterial DNA in Human Bone Marrow. Microorganisms 2023; 11:1788. [PMID: 37512960 PMCID: PMC10384717 DOI: 10.3390/microorganisms11071788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Bone marrow is a cell-rich tissue of the reticuloendothelial system essential in the homeostasis and accurate functioning of hematopoiesis and of the immune system; moreover, it is also rich in lipids because it contains marrow adipocytes. This work aimed to evaluate the detection of mycobacterial DNA in human bone marrow as a tool to understand the complex pathology caused by the main pathogen Mycobacterium tuberculosis (Mtb). Formalin-fixed paraffin-embedded human bone marrow samples were studied using both conventional PCR + hybridization and in situ PCR to figure out the cell distribution of the targeted DNA. Samples were retrospectively collected from HIV+ patients with microbiologically proved mycobacterial infection and from subjects without evidence of infection. Mycobacterium avium (Mav) as well as Mtb DNA was detected in both settings, including tissues with and without granulomas. We detected DNA from both mycobacterial species, using in situ PCR, inside bone marrow macrophages. Other cell types, including adipocytes, showed positive signals only for Mtb DNA. This result suggested, for the first time, that marrow adipocytes could constitute an ideal reservoir for the persistence of Mtb, allowing the bacilli to establish long-lasting latent infection within a suitable lipid environment. This fact might differentiate pathogenic behavior of non-specialized pathogens such as Mav from that of specialized pathogens such as Mtb.
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Affiliation(s)
- Alba González-Escalada
- Facultad de Ciencias de la Salud, Area of Medical Microbiology, Rey Juan Carlos University, 28922 Alcorcon, Spain
| | - María José Rebollo
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonoma University of Madrid, 28029 Madrid, Spain
| | - Jorge Barrios Payan
- Experimental Pathology Section, Department of Pathology, National Institute of Medical Sciences and Nutrition Salvador Zubirán, México City 14080, Mexico
| | - Rogelio Hernández-Pando
- Experimental Pathology Section, Department of Pathology, National Institute of Medical Sciences and Nutrition Salvador Zubirán, México City 14080, Mexico
| | - María Jesús García
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonoma University of Madrid, 28029 Madrid, Spain
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2
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Costa MFDS, Pereira-Dutra F, Deboosere N, Jouny S, Song OR, Iack G, Souza AL, Roma EH, Delorme V, Bozza PT, Brodin P. Mycobacterium tuberculosis induces delayed lipid droplet accumulation in dendritic cells depending on bacterial viability and virulence. Mol Microbiol 2023; 119:224-236. [PMID: 36579614 DOI: 10.1111/mmi.15023] [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: 11/30/2021] [Revised: 12/23/2022] [Accepted: 12/25/2022] [Indexed: 12/30/2022]
Abstract
Tuberculosis remains a global health threat with high morbidity. Dendritic cells (DCs) participate in the acute and chronic inflammatory responses to Mycobacterium tuberculosis (Mtb) by directing the adaptive immune response and are present in lung granulomas. In macrophages, the interaction of lipid droplets (LDs) with mycobacteria-containing phagosomes is central to host-pathogen interactions. However, the data available for DCs are still a matter of debate. Here, we reported that bone marrow-derived DCs (BMDCs) were susceptible to Mtb infection and replication at similar rate to macrophages. Unlike macrophages, the analysis of gene expression showed that Mtb infection induced a delayed increase in lipid droplet-related genes and proinflammatory response. Hence, LD accumulation has been observed by high-content imaging in late periods. Infection of BMDCs with killed H37Rv demonstrated that LD accumulation depends on Mtb viability. Moreover, infection with the attenuated strains H37Ra and Mycobacterium bovis-BCG induced only an early transient increase in LDs, whereas virulent Mtb also induced delayed LD accumulation. In addition, infection with the BCG strain with the reintroduced virulence RD1 locus induced higher LD accumulation and bacterial replication when compared to parental BCG. Collectively, our data suggest that delayed LD accumulation in DCs is dependent on mycobacterial viability and virulence.
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Affiliation(s)
- Maria Fernanda de Souza Costa
- Instituto de Biologia, Departamento de Imunobiologia, Universidade Federal Fluminense, Niteroi, Brazil.,Center for Technological Development in Health, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil.,Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Filipe Pereira-Dutra
- Immunopharmacology Laboratory, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Nathalie Deboosere
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Samuel Jouny
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Ok-Ryul Song
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Guilherme Iack
- Instituto de Biologia, Departamento de Imunobiologia, Universidade Federal Fluminense, Niteroi, Brazil.,Immunopharmacology Laboratory, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Andreia Lamoglia Souza
- Fundação Oswaldo Cruz, Laboratory of Immunology and Immunogenetics in Infectious Diseases at Evandro Chagas National Institute of Infectious Diseases, Rio de Janeiro, Brazil
| | - Eric Henrique Roma
- Fundação Oswaldo Cruz, Laboratory of Immunology and Immunogenetics in Infectious Diseases at Evandro Chagas National Institute of Infectious Diseases, Rio de Janeiro, Brazil
| | - Vincent Delorme
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Patricia T Bozza
- Immunopharmacology Laboratory, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Priscille Brodin
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
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3
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Alebouyeh S, Cárdenas-Pestana JA, Vazquez L, Prados-Rosales R, Del Portillo P, Sanz J, Menéndez MC, García MJ. Iron deprivation enhances transcriptional responses to in vitro growth arrest of Mycobacterium tuberculosis. Front Microbiol 2022; 13:956602. [PMID: 36267176 PMCID: PMC9577196 DOI: 10.3389/fmicb.2022.956602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 09/07/2022] [Indexed: 11/18/2022] Open
Abstract
The establishment of Mycobacterium tuberculosis (Mtb) long-term infection in vivo depends on several factors, one of which is the availability of key nutrients such as iron (Fe). The relation between Fe deprivation inside and outside the granuloma, and the capacity of Mtb to accumulate lipids and persist in the absence of growth is not well understood. In this context, current knowledge of how Mtb modifies its lipid composition in response to growth arrest, depending on iron availability, is scarce. To shed light on these matters, in this work we compare genome-wide transcriptomic and lipidomic profiles of Mtb at exponential and stationary growth phases using cultures with glycerol as a carbon source, in the presence or absence of iron. As a result, we found that transcriptomic responses to growth arrest, considered as the transition from exponential to stationary phase, are iron dependent for as many as 714 genes (iron-growth interaction contrast, FDR <0.05), and that, in a majority of these genes, iron deprivation enhances the magnitude of the transcriptional responses to growth arrest in either direction. On the one hand, genes whose upregulation upon growth arrest is enhanced by iron deprivation were enriched in functional terms related to homeostasis of ion metals, and responses to several stressful cues considered cardinal features of the intracellular environment. On the other hand, genes showing negative responses to growth arrest that are stronger in iron-poor medium were enriched in energy production processes (TCA cycle, NADH dehydrogenation and cellular respiration), and key controllers of ribosomal activity shut-down, such as the T/A system mazE6/F6. Despite of these findings, a main component of the cell envelope, lipid phthiocerol dimycocerosate (PDIM), was not detected in the stationary phase regardless of iron availability, suggesting that lipid changes during Mtb adaptation to non-dividing phenotypes appear to be iron-independent. Taken together, our results indicate that environmental iron levels act as a key modulator of the intensity of the transcriptional adaptations that take place in the bacterium upon its transition between dividing and dormant-like phenotypes in vitro.
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Affiliation(s)
- Sogol Alebouyeh
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonomous University of Madrid, Madrid, Spain
| | - Jorge A. Cárdenas-Pestana
- Department of Theoretical Physics, University of Zaragoza, Zaragoza, Spain
- Institute for Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, Zaragoza, Spain
| | - Lucia Vazquez
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonomous University of Madrid, Madrid, Spain
| | - Rafael Prados-Rosales
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonomous University of Madrid, Madrid, Spain
| | | | - Joaquín Sanz
- Department of Theoretical Physics, University of Zaragoza, Zaragoza, Spain
- Institute for Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, Zaragoza, Spain
- *Correspondence: Maria J. García,
| | - Maria Carmen Menéndez
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonomous University of Madrid, Madrid, Spain
- Maria Carmen Menéndez,
| | - Maria J. García
- Department of Preventive Medicine and Public Health and Microbiology, School of Medicine, Autonomous University of Madrid, Madrid, Spain
- Joaquín Sanz,
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Asai M, Li Y, Spiropoulos J, Cooley W, Everest DJ, Kendall SL, Martín C, Robertson BD, Langford PR, Newton SM. Galleria mellonella as an infection model for the virulent Mycobacterium tuberculosis H37Rv. Virulence 2022; 13:1543-1557. [PMID: 36052440 PMCID: PMC9481108 DOI: 10.1080/21505594.2022.2119657] [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] [Indexed: 11/26/2022] Open
Abstract
Tuberculosis (TB), caused by Mycobacterium tuberculosis (MTB), is a leading cause of infectious disease mortality. Animal infection models have contributed substantially to our understanding of TB, yet their biological and non-biological limitations are a research bottleneck. There is a need for more ethically acceptable, economical, and reproducible TB infection models capable of mimicking key aspects of disease. Here, we demonstrate and present a basic description of how Galleria mellonella (the greater wax moth, Gm) larvae can be used as a low cost, rapid, and ethically more acceptable model for TB research. This is the first study to infect Gm with the fully virulent MTB H37Rv, the most widely used strain in research. Infection of Gm with MTB resulted in a symptomatic lethal infection, the virulence of which differed from both attenuated Mycobacterium bovis BCG and auxotrophic MTB strains. The Gm-MTB model can also be used for anti-TB drug screening, although CFU enumeration from Gm is necessary for confirmation of mycobacterial load reducing activity of the tested compound. Furthermore, comparative virulence of MTB isogenic mutants can be determined in Gm. However, comparison of mutant phenotypes in Gm against conventional models must consider the limitations of innate immunity. Our findings indicate that Gm will be a practical, valuable, and advantageous additional model to be used alongside existing models to advance tuberculosis research.
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Affiliation(s)
- Masanori Asai
- Section of Paediatric Infectious Diseases, Department of Infectious Disease, Imperial College London, London, UK
| | - Yanwen Li
- Section of Paediatric Infectious Diseases, Department of Infectious Disease, Imperial College London, London, UK
| | - John Spiropoulos
- Department of Pathology, Animal and Plant Health Agency, Addlestone, UK
| | - William Cooley
- Department of Pathology, Animal and Plant Health Agency, Addlestone, UK
| | - David J Everest
- Department of Pathology, Animal and Plant Health Agency, Addlestone, UK
| | - Sharon L Kendall
- Centre for Emerging, Endemic and Exotic Diseases, Pathobiology and Population Sciences, Royal Veterinary College, Hartfield, UK
| | - Carlos Martín
- Department of Microbiology, Facultad de Medicina Universidad de Zaragoza, CIBERES, (ISCIII), Spain
| | - Brian D Robertson
- MRC Centre for Molecular Bacteriology and Infection, Department of Infectious Disease, Imperial College London, UK
| | - Paul R Langford
- Section of Paediatric Infectious Diseases, Department of Infectious Disease, Imperial College London, London, UK
| | - Sandra M Newton
- Section of Paediatric Infectious Diseases, Department of Infectious Disease, Imperial College London, London, UK
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5
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Lewis HM, Costa C, Dartois V, Kaya F, Chambers M, de Jesus J, Palitsin V, Webb R, Bailey MJ. Colocation of Lipids, Drugs, and Metal Biomarkers Using Spatially Resolved Lipidomics with Elemental Mapping. Anal Chem 2022; 94:11798-11806. [PMID: 35981335 PMCID: PMC9434551 DOI: 10.1021/acs.analchem.2c01940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Elemental imaging is widely used for imaging cells and
tissues
but rarely in combination with organic mass spectrometry, which can
be used to profile lipids and measure drug concentrations. Here, we
demonstrate how elemental imaging and a new method for spatially resolved
lipidomics (DAPNe-LC-MS, based on capillary microsampling and liquid
chromatography mass spectrometry) can be used in combination to probe
the relationship between metals, drugs, and lipids in discrete areas
of tissues. This new method for spatial lipidomics, reported here
for the first time, has been applied to rabbit lung tissues containing
a lesion (caseous granuloma) caused by tuberculosis infection. We
demonstrate how elemental imaging with spatially resolved lipidomics
can be used to probe the association between ion accumulation and
lipid profiles and verify local drug distribution.
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Affiliation(s)
- Holly-May Lewis
- Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, U.K
| | - Catia Costa
- University of Surrey Ion Beam Centre, Guildford, Surrey GU2 7XH, U.K
| | - Véronique Dartois
- Center for Discovery and Innovation, Hackensack Meridian School of Medicine, 123 Metro Boulevard, Nutley, New Jersey 07110, United States
| | - Firat Kaya
- Center for Discovery and Innovation, Hackensack Meridian School of Medicine, 123 Metro Boulevard, Nutley, New Jersey 07110, United States
| | - Mark Chambers
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, U.K
| | - Janella de Jesus
- Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, U.K
| | - Vladimir Palitsin
- University of Surrey Ion Beam Centre, Guildford, Surrey GU2 7XH, U.K
| | - Roger Webb
- University of Surrey Ion Beam Centre, Guildford, Surrey GU2 7XH, U.K
| | - Melanie J Bailey
- Department of Chemistry, University of Surrey, Guildford, Surrey GU2 7XH, U.K
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6
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García-Morales L, Del Portillo P, Anzola JM, Ares MA, Helguera-Repetto AC, Cerna-Cortes JF, Méndez-Tenorio A, García MJ, Otal I, Martín C, Gonzalez-y-Merchand JA, Rivera-Gutiérrez S. The Lack of the TetR-Like Repressor Gene BCG_2177c (Rv2160A) May Help Mycobacteria Overcome Intracellular Redox Stress and Survive Longer Inside Macrophages When Surrounded by a Lipid Environment. Front Cell Infect Microbiol 2022; 12:907890. [PMID: 35873160 PMCID: PMC9301340 DOI: 10.3389/fcimb.2022.907890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/06/2022] [Indexed: 11/23/2022] Open
Abstract
Mycobacteria, like other microorganisms, survive under different environmental variations by expressing an efficient adaptive response, oriented by regulatory elements, such as transcriptional repressors of the TetR family. These repressors in mycobacteria also appear to be related to cholesterol metabolism. In this study, we have evaluated the effect of a fatty acid (oleic–palmitic–stearic)/cholesterol mixture on some phenotypic and genotypic characteristics of a tetR-mutant strain (BCG_2177c mutated gene) of M. bovis BCG, a homologous of Rv2160A of M. tuberculosis. In order to accomplish this, we have analyzed the global gene expression of this strain by RNA-seq and evaluated its neutral-lipid storage capacity and potential to infect macrophages. We have also determined the macrophage response by measuring some pro- and anti-inflammatory cytokine expressions. In comparison with wild-type microorganisms, we showed that the mutation in the BCG_2177c gene did not affect the growth of M. bovis BCG in the presence of lipids but it probably modified the structure/composition of its cell envelope. Compared to with dextrose, an overexpression of the transcriptome of the wild-type and mutant strains was observed when these mycobacteria were cultured in lipids, mainly at the exponential phase. Twelve putative intracellular redox balance maintenance genes and four others coding for putative transcriptional factors (including WhiB6 and three TetR-like) were the main elements repeatedly overexpressed when cultured in the presence of lipids. These genes belonged to the central part of what we called the “genetic lipid signature” for M. bovis BCG. We have also found that all these mycobacteria genotypic changes affected the outcome of BCG-infected macrophages, being the mutant strain most adapted to persist longer inside the host. This high persistence result was also confirmed when mutant-infected macrophages showed overexpression of the anti-inflammatory cytokine TGF-β versus pro-inflammatory cytokines. In summary, the lack of this TetR-like repressor expression, within a lipid environment, may help mycobacteria overcome intracellular redox stress and survive longer inside their host.
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Affiliation(s)
- Lázaro García-Morales
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Patricia Del Portillo
- Grupo de Biotecnología Molecular, Grupo de Bioinformática y Biología Computacional, Corporación CorpoGen, Bogotá, Colombia
| | - Juan M. Anzola
- Grupo de Biotecnología Molecular, Grupo de Bioinformática y Biología Computacional, Corporación CorpoGen, Bogotá, Colombia
- Facultad de Ingeniería y Ciencias Básicas, Universidad Central, Bogotá, D.C., Colombia
| | - Miguel A. Ares
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, Mexico
| | - Addy C. Helguera-Repetto
- Departamento de Inmuno-Bioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México, Mexico
| | - Jorge F. Cerna-Cortes
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Alfonso Méndez-Tenorio
- Laboratorio de Bioinformática y Biotecnología Genómica, Departamento de Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - María J. García
- Departamento de Medicina Preventiva, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Isabel Otal
- Grupo de Genética de Micobacterias, Universidad de Zaragoza, IIS Aragón, Zaragoza, Spain
- Centro de Investigación Biomédica en Red (CIBER) Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
| | - Carlos Martín
- Grupo de Genética de Micobacterias, Universidad de Zaragoza, IIS Aragón, Zaragoza, Spain
- Centro de Investigación Biomédica en Red (CIBER) Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
- Servicio de Microbiología, Hospital Universitario Miguel Servet, Zaragoza, Spain
| | - Jorge A. Gonzalez-y-Merchand
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
- *Correspondence: Jorge A. Gonzalez-y-Merchand, ; Sandra Rivera-Gutiérrez,
| | - Sandra Rivera-Gutiérrez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
- *Correspondence: Jorge A. Gonzalez-y-Merchand, ; Sandra Rivera-Gutiérrez,
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Abdel-Ghaffar WH, Abdelghffar EA. Pathophysiological effects of Tamiflu on liver and kidneys of male rats. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022; 11:15. [PMID: 35097134 PMCID: PMC8787452 DOI: 10.1186/s43088-021-00189-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 12/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Tamiflu/oseltamivir phosphate (OP), an anti-influenza drug, has a highly doubted safety especially after many cases of abnormal behaviour and deaths reported after being used. Such controversy was also locally and globally generated, especially after being heavily used in COVID-19 treatment protocol. This study was designed to evaluate the effect of three different doses of OP on the liver and kidneys of male adult albino rats through histological approaches, measuring their DNA integrity and biochemical analyses. Different doses of Tamiflu applied to humans were converted to rats, then observed their effects on the liver and kidneys. Rats were divided into four groups. G1: considered as control group. The rest of the three treated groups were received the same calculated dose of Tamiflu (6.75 mg/kg b.w.) in three different durations. G2, G3 and G4 represented the animals orally received OP, in which the rats received OP twice for 5 consecutive days, once for 10 and 45 days, respectively. RESULTS Our data showed numerous deleterious necrotic and fibrotic histopathological changes in the liver, and kidneys; as well as necrotic DNA smears, by using electrophoresis, in OP-treated rats of G2 and G4. In addition, OP significantly increased the serum cellular hepatic/renal toxicity markers (ALT, AST, ALP, GGT, indirect bilirubin, urea, creatinine, uric acid, & Na+). Also, it showed a reduction in the levels of serum total protein, albumin and K+ ions in rats of G2 and G4 compared with G1. In G3, OP treatment did not significantly alter hepatic/renal histological, DNA integrity and biochemical analyses in rats. CONCLUSIONS The therapeutic and long-term prophylactic doses of OP most likely cause structural and functional hepato- and nephrotoxicity in experimentally subjected rats. So, caution must be taken during Tamiflu treatment, and not used for long durations and/or with repetitive doses (time- and/or accumulative-dose-dependent); especially with patients suffer from liver and/or kidney dysfunction, while the short-term prophylactic dose of OP appears to be relatively safe and could be explored for oral medications. GRAPHICAL ABSTRACT
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Affiliation(s)
| | - Eman A. Abdelghffar
- Department of Zoology, Faculty of Science, Ain Shams University, Cairo, Egypt
- Biology Department, Faculty of Science, Taibah University, Yanbu Branch, Saudi Arabia
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8
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Putz EJ, Andreasen CB, Stasko JA, Fernandes LGV, Palmer MV, Rauh MJ, Nally JE. Circulating Foamy Macrophages in the Golden Syrian Hamster (Mesocricetus auratus) Model of Leptospirosis. J Comp Pathol 2021; 189:98-109. [PMID: 34886992 DOI: 10.1016/j.jcpa.2021.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/14/2021] [Accepted: 10/15/2021] [Indexed: 12/21/2022]
Abstract
Leptospirosis is a world-wide zoonotic disease caused by pathogenic Leptospira and can be asymptomatic or can cause clinical signs ranging from influenza-like to multi-organ failure and death in severe cases. While species and strain specificity can play a major role in disease presentation, the hamster is susceptible to most leptospiral infections and is the model of choice for vaccine efficacy testing. During evaluation of blood smears from hamsters challenged with different species and strains of Leptospira, a circulating population of large, mononuclear, lipid-filled cells, most similar to foamy macrophages (FMs), was detected. Circulating FMs were identified by Giemsa staining and verified by scanning and transmission electron microscopy. FMs were found in the circulating blood of all Leptospira-challenged hamsters, indicating that the finding was not species or strain specific, although higher numbers of FMs tended to correlate with severity of disease. The unique finding of circulating FMs in the hamster model of leptospirosis can yield additional insights into the pathogenesis of leptospirosis and other diseases that induce circulating FMs.
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Affiliation(s)
- Ellie J Putz
- Infectious Bacterial Diseases Research Unit, USDA Agriculture Research Service, National Animal Disease Center, Ames, Iowa, USA.
| | - Claire B Andreasen
- Department of Veterinary Pathology, College of Veterinary Medicine, Ames, Iowa, USA
| | - Judith A Stasko
- Infectious Bacterial Diseases Research Unit, USDA Agriculture Research Service, National Animal Disease Center, Ames, Iowa, USA
| | - Luis G V Fernandes
- Infectious Bacterial Diseases Research Unit, USDA Agriculture Research Service, National Animal Disease Center, Ames, Iowa, USA; Laboratório de Desenvolvimento de Vacinas, Instituto Butantan, São Paulo, Brazil
| | - Mitchell V Palmer
- Infectious Bacterial Diseases Research Unit, USDA Agriculture Research Service, National Animal Disease Center, Ames, Iowa, USA
| | - Michael J Rauh
- Department of Pathology & Molecular Medicine, Queen's University, Kingston, Ontario, Canada
| | - Jarlath E Nally
- Infectious Bacterial Diseases Research Unit, USDA Agriculture Research Service, National Animal Disease Center, Ames, Iowa, USA
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9
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Mukundan S, Singh P, Shah A, Kumar R, O’Neill KC, Carter CL, Russell DG, Subbian S, Parekkadan B. In Vitro Miniaturized Tuberculosis Spheroid Model. Biomedicines 2021; 9:1209. [PMID: 34572395 PMCID: PMC8470281 DOI: 10.3390/biomedicines9091209] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/01/2021] [Accepted: 09/06/2021] [Indexed: 12/11/2022] Open
Abstract
Tuberculosis (TB) is a public health concern that impacts 10 million people around the world. Current in vitro models are low throughput and/or lack caseation, which impairs drug effectiveness in humans. Here, we report the generation of THP-1 human monocyte/macrophage spheroids housing mycobacteria (TB spheroids). These TB spheroids have a central core of dead cells co-localized with mycobacteria and are hypoxic. TB spheroids exhibit higher levels of pro-inflammatory factor TNFα and growth factors G-CSF and VEGF when compared to non-infected control. TB spheroids show high levels of lipid deposition, characterized by MALDI mass spectrometry imaging. TB spheroids infected with strains of differential virulence, Mycobacterium tuberculosis (Mtb) HN878 and CDC1551 vary in response to Isoniazid and Rifampicin. Finally, we adapt the spheroid model to form peripheral blood mononuclear cells (PBMCs) and lung fibroblasts (NHLF) 3D co-cultures. These results pave the way for the development of new strategies for disease modeling and therapeutic discovery.
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Affiliation(s)
- Shilpaa Mukundan
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Jersey City, NJ 08854, USA; (S.M.); (A.S.)
| | - Pooja Singh
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Jersey City, NJ 07103, USA; (P.S.); (R.K.); (S.S.)
| | - Aditi Shah
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Jersey City, NJ 08854, USA; (S.M.); (A.S.)
| | - Ranjeet Kumar
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Jersey City, NJ 07103, USA; (P.S.); (R.K.); (S.S.)
| | - Kelly C. O’Neill
- Department Center for Discovery and Innovation, Hackensack Meridian Health, Neptune, NJ 07110, USA; (K.C.O.); (C.L.C.)
| | - Claire L. Carter
- Department Center for Discovery and Innovation, Hackensack Meridian Health, Neptune, NJ 07110, USA; (K.C.O.); (C.L.C.)
| | - David G. Russell
- Department of Microbiology and Immunology, School of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA;
| | - Selvakumar Subbian
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Jersey City, NJ 07103, USA; (P.S.); (R.K.); (S.S.)
| | - Biju Parekkadan
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Jersey City, NJ 08854, USA; (S.M.); (A.S.)
- Department of Medicine, Rutgers Biomedical Health Sciences, Rutgers, The State University of New Jersey, Jersey City, NJ 08854, USA
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10
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Mallick I, Santucci P, Poncin I, Point V, Kremer L, Cavalier JF, Canaan S. Intrabacterial lipid inclusions in mycobacteria: unexpected key players in survival and pathogenesis? FEMS Microbiol Rev 2021; 45:6283747. [PMID: 34036305 DOI: 10.1093/femsre/fuab029] [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] [Received: 10/07/2020] [Accepted: 05/21/2021] [Indexed: 12/12/2022] Open
Abstract
Mycobacterial species, including Mycobacterium tuberculosis, rely on lipids to survive and chronically persist within their hosts. Upon infection, opportunistic and strict pathogenic mycobacteria exploit metabolic pathways to import and process host-derived free fatty acids, subsequently stored as triacylglycerols under the form of intrabacterial lipid inclusions (ILI). Under nutrient-limiting conditions, ILI constitute a critical source of energy that fuels the carbon requirements and maintain redox homeostasis, promoting bacterial survival for extensive periods of time. In addition to their basic metabolic functions, these organelles display multiple other biological properties, emphasizing their central role in the mycobacterial lifecycle. However, despite of their importance, the dynamics of ILI metabolism and their contribution to mycobacterial adaptation/survival in the context of infection has not been thoroughly documented. Herein, we provide an overview of the historical ILI discoveries, their characterization, and current knowledge regarding the micro-environmental stimuli conveying ILI formation, storage and degradation. We also review new biological systems to monitor the dynamics of ILI metabolism in extra- and intracellular mycobacteria and describe major molecular actors in triacylglycerol biosynthesis, maintenance and breakdown. Finally, emerging concepts regarding to the role of ILI in mycobacterial survival, persistence, reactivation, antibiotic susceptibility and inter-individual transmission are also discuss.
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Affiliation(s)
- Ivy Mallick
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France.,IHU Méditerranée Infection, Aix-Marseille Univ., Marseille, France
| | - Pierre Santucci
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
| | - Isabelle Poncin
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
| | - Vanessa Point
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
| | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier (IRIM), CNRS, UMR 9004, Université de Montpellier, Montpellier, France.,IRIM, INSERM, Montpellier, France
| | | | - Stéphane Canaan
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
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11
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Veyron-Churlet R, Saliou JM, Locht C. Interconnection of the mycobacterial heparin-binding hemagglutinin with cholesterol degradation and heme/iron pathways identified by proximity-dependent biotin identification in Mycobacterium smegmatis. Environ Microbiol 2021; 23:3212-3224. [PMID: 33913567 DOI: 10.1111/1462-2920.15547] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 04/15/2021] [Accepted: 04/26/2021] [Indexed: 11/28/2022]
Abstract
Deciphering protein-protein interactions is a critical step in the identification and the understanding of biological mechanisms deployed by pathogenic bacteria. The development of in vivo technologies to characterize these interactions is still in its infancy, especially for bacteria whose subcellular organization is particularly complex, such as mycobacteria. In this work, we used the proximity-dependent biotin identification (BioID) to define the mycobacterial heparin-binding hemagglutinin (HbhA) interactome in the saprophytic bacterium Mycobacterium smegmatis. M. smegmatis is a commonly used model to study and characterize the physiology of pathogenic mycobacteria, such as Mycobacterium tuberculosis. Here, we adapted the BioID technology to in vivo protein-protein interactions studies in M. smegmatis, which presents several advantages, such as maintaining the complex organization of the mycomembrane, offering the possibility to study membrane or cell wall-associated proteins, including HbhA, in the presence of cofactors and post-translational modifications, such as the complex methylation pattern of HbhA. Using this technology, we found that HbhA is interconnected with cholesterol degradation and heme/iron pathways. These results are in line with previous studies showing the dual localization of HbhA, associated with the cell wall and intracytoplasmic lipid inclusions, and its induction under high iron growth conditions.
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Affiliation(s)
- Romain Veyron-Churlet
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, F-59000, France
| | - Jean-Michel Saliou
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, Lille, F-59000, France
| | - Camille Locht
- Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, F-59000, France
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12
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Niño-Padilla EI, Velazquez C, Garibay-Escobar A. Mycobacterial biofilms as players in human infections: a review. BIOFOULING 2021; 37:410-432. [PMID: 34024206 DOI: 10.1080/08927014.2021.1925886] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 04/18/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
The role of biofilms in pathogenicity and treatment strategies is often neglected in mycobacterial infections. In recent years, the emergence of nontuberculous mycobacterial infections has necessitated the development of novel prophylactic strategies and elucidation of the mechanisms underlying the establishment of chronic infections. More importantly, the question arises whether members of the Mycobacterium tuberculosis complex can form biofilms and contribute to latent tuberculosis and drug resistance because of the long-lasting and recalcitrant nature of its infections. This review discusses some of the molecular mechanisms by which biofilms could play a role in infection or pathological events in humans.
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Affiliation(s)
| | - Carlos Velazquez
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
| | - Adriana Garibay-Escobar
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
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13
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Rens C, Chao JD, Sexton DL, Tocheva EI, Av-Gay Y. Roles for phthiocerol dimycocerosate lipids in Mycobacterium tuberculosis pathogenesis. MICROBIOLOGY-SGM 2021; 167. [PMID: 33629944 DOI: 10.1099/mic.0.001042] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The success of Mycobacterium tuberculosis as a pathogen is well established: tuberculosis is the leading cause of death by a single infectious agent worldwide. The threat of multi- and extensively drug-resistant bacteria has renewed global concerns about this pathogen and understanding its virulence strategies will be essential in the fight against tuberculosis. The current review will focus on phthiocerol dimycocerosates (PDIMs), a long-known and well-studied group of complex lipids found in the M. tuberculosis cell envelope. Numerous studies show a role for PDIMs in several key steps of M. tuberculosis pathogenesis, with recent studies highlighting its involvement in bacterial virulence, in association with the ESX-1 secretion system. Yet, the mechanisms by which PDIMs help M. tuberculosis to control macrophage phagocytosis, inhibit phagosome acidification and modulate host innate immunity, remain to be fully elucidated.
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Affiliation(s)
- Céline Rens
- Division of Infectious Disease, Department of Medicine, The University of British Columbia, Vancouver, Canada
| | - Joseph D Chao
- Division of Infectious Disease, Department of Medicine, The University of British Columbia, Vancouver, Canada
| | - Danielle L Sexton
- Department of Microbiology & Immunology, The University of British Columbia, Vancouver, Canada
| | - Elitza I Tocheva
- Department of Microbiology & Immunology, The University of British Columbia, Vancouver, Canada
| | - Yossef Av-Gay
- Division of Infectious Disease, Department of Medicine, The University of British Columbia, Vancouver, Canada.,Department of Microbiology & Immunology, The University of British Columbia, Vancouver, Canada
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14
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Banerjee U, Sankar S, Singh A, Chandra N. A Multi-Pronged Computational Pipeline for Prioritizing Drug Target Strategies for Latent Tuberculosis. Front Chem 2020; 8:593497. [PMID: 33381491 PMCID: PMC7767875 DOI: 10.3389/fchem.2020.593497] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 11/24/2020] [Indexed: 12/02/2022] Open
Abstract
Tuberculosis is one of the deadliest infectious diseases worldwide and the prevalence of latent tuberculosis acts as a huge roadblock in the global effort to eradicate tuberculosis. Most of the currently available anti-tubercular drugs act against the actively replicating form of Mycobacterium tuberculosis (Mtb), and are not effective against the non-replicating dormant form present in latent tuberculosis. With about 30% of the global population harboring latent tuberculosis and the requirement for prolonged treatment duration with the available drugs in such cases, the rate of adherence and successful completion of therapy is low. This necessitates the discovery of new drugs effective against latent tuberculosis. In this work, we have employed a combination of bioinformatics and chemoinformatics approaches to identify potential targets and lead candidates against latent tuberculosis. Our pipeline adopts transcriptome-integrated metabolic flux analysis combined with an analysis of a transcriptome-integrated protein-protein interaction network to identify perturbations in dormant Mtb which leads to a shortlist of 6 potential drug targets. We perform a further selection of the candidate targets and identify potential leads for 3 targets using a range of bioinformatics methods including structural modeling, binding site association and ligand fingerprint similarities. Put together, we identify potential new strategies for targeting latent tuberculosis, new candidate drug targets as well as important lead clues for drug design.
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Affiliation(s)
- Ushashi Banerjee
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Santhosh Sankar
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Amit Singh
- Center for Infectious Disease Research, Indian Institute of Science, Bangalore, India
| | - Nagasuma Chandra
- Department of Biochemistry, Indian Institute of Science, Bangalore, India.,Center for Biosystems Science and Engineering, Indian Institute of Science, Bangalore, India
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15
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Cavalier JF, Spilling CD, Durand T, Camoin L, Canaan S. Lipolytic enzymes inhibitors: A new way for antibacterial drugs discovery. Eur J Med Chem 2020; 209:112908. [PMID: 33071055 DOI: 10.1016/j.ejmech.2020.112908] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/29/2020] [Accepted: 10/03/2020] [Indexed: 10/23/2022]
Abstract
Tuberculosis (TB) caused by Mycobacterium tuberculosis (M. tb) still remains the deadliest infectious disease worldwide with 1.5 million deaths in 2018, of which about 15% are attributed to resistant strains. Another significant example is Mycobacterium abscessus (M. abscessus), a nontuberculous mycobacteria (NTM) responsible for cutaneous and pulmonary infections, representing up to 95% of NTM infections in cystic fibrosis (CF) patients. M. abscessus is a new clinically relevant pathogen and is considered one of the most drug-resistant mycobacteria for which standardized chemotherapeutic regimens are still lacking. Together the emergence of M. tb and M. abscessus multi-drug resistant strains with ineffective and expensive therapeutics, have paved the way to the development of new classes of anti-mycobacterial agents offering additional therapeutic options. In this context, specific inhibitors of mycobacterial lipolytic enzymes represent novel and promising antibacterial molecules to address this challenging issue. The results highlighted here include a complete overview of the antibacterial activities, either in broth medium or inside infected macrophages, of two families of promising and potent anti-mycobacterial multi-target agents, i.e. oxadiazolone-core compounds (OX) and Cyclophostin & Cyclipostins analogs (CyC); the identification and biochemical validation of their effective targets (e.g., the antigen 85 complex and TesA playing key roles in mycolic acid metabolism) together with their respective crystal structures. To our knowledge, these are the first families of compounds able to target and impair replicating as well as intracellular bacteria. We are still impelled in deciphering their mode of action and finding new potential therapeutic targets against mycobacterial-related diseases.
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Affiliation(s)
- Jean-François Cavalier
- Aix-Marseille Univ., CNRS, LISM, Institut de Microbiologie de La Méditerranée FR3479, Marseille, France.
| | - Christopher D Spilling
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri, 63121, United States
| | - Thierry Durand
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Luc Camoin
- Aix-Marseille Univ., INSERM, CNRS, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, Marseille, France
| | - Stéphane Canaan
- Aix-Marseille Univ., CNRS, LISM, Institut de Microbiologie de La Méditerranée FR3479, Marseille, France.
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16
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Madani A, Mallick I, Guy A, Crauste C, Durand T, Fourquet P, Audebert S, Camoin L, Canaan S, Cavalier JF. Dissecting the antibacterial activity of oxadiazolone-core derivatives against Mycobacterium abscessus. PLoS One 2020; 15:e0238178. [PMID: 32946441 PMCID: PMC7500638 DOI: 10.1371/journal.pone.0238178] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 08/12/2020] [Indexed: 02/05/2023] Open
Abstract
Mycobacterium abscessus (M. abscessus), a rapidly growing mycobacterium, is an emergent opportunistic pathogen responsible for chronic bronchopulmonary infections in individuals with respiratory diseases such as cystic fibrosis. Most treatments of M. abscessus pulmonary infections are poorly effective due to the intrinsic resistance of this bacteria against a broad range of antibiotics including anti-tuberculosis agents. Consequently, the number of drugs that are efficient against M. abscessus remains limited. In this context, 19 oxadiazolone (OX) derivatives have been investigated for their antibacterial activity against both the rough (R) and smooth (S) variants of M. abscessus. Several OXs impair extracellular M. abscessus growth with moderated minimal inhibitory concentrations (MIC), or act intracellularly by inhibiting M. abscessus growth inside infected macrophages with MIC values similar to those of imipenem. Such promising results prompted us to identify the potential target enzymes of the sole extra and intracellular inhibitor of M. abscessus growth, i.e., compound iBpPPOX, via activity-based protein profiling combined with mass spectrometry. This approach led to the identification of 21 potential protein candidates being mostly involved in M. abscessus lipid metabolism and/or in cell wall biosynthesis. Among them, the Ag85C protein has been confirmed as a vulnerable target of iBpPPOX. This study clearly emphasizes the potential of the OX derivatives to inhibit the extracellular and/or intracellular growth of M. abscessus by targeting various enzymes potentially involved in many physiological processes of this most drug-resistant mycobacterial species.
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Affiliation(s)
- Abdeldjalil Madani
- Aix-Marseille Univ., CNRS, LISM, Institut de Microbiologie de la Méditerranée FR3479, Marseille, France
| | - Ivy Mallick
- Aix-Marseille Univ., CNRS, LISM, Institut de Microbiologie de la Méditerranée FR3479, Marseille, France
- IHU Méditerranée Infection, Aix-Marseille Univ., Marseille, France
| | - Alexandre Guy
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Céline Crauste
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Thierry Durand
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Patrick Fourquet
- Aix-Marseille Univ, INSERM, CNRS, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, Marseille, France
| | - Stéphane Audebert
- Aix-Marseille Univ, INSERM, CNRS, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, Marseille, France
| | - Luc Camoin
- Aix-Marseille Univ, INSERM, CNRS, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, Marseille, France
| | - Stéphane Canaan
- Aix-Marseille Univ., CNRS, LISM, Institut de Microbiologie de la Méditerranée FR3479, Marseille, France
| | - Jean François Cavalier
- Aix-Marseille Univ., CNRS, LISM, Institut de Microbiologie de la Méditerranée FR3479, Marseille, France
- * E-mail:
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17
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Nutritional status positively impacts humoral immunity against its Mycobacterium tuberculosis, disease progression, and vaccine development. PLoS One 2020; 15:e0237062. [PMID: 32760105 PMCID: PMC7410285 DOI: 10.1371/journal.pone.0237062] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 07/20/2020] [Indexed: 11/25/2022] Open
Abstract
Nutritional status contributes to the regulation of immune responses against pathogens, and malnutrition has been considered as a risk factor for tuberculosis (TB). Mycobacterium tuberculosis (Mtb), the causative agent of TB, can modulate host lipid metabolism and induce lipid accumulation in macrophages, where the bacilli adopt a dormant phenotype. In addition, serum lipid components play dual roles in the regulation of and protection from Mtb infection. We analyzed the relationship between nutritional status and the humoral immune response in TB patients. We found that serum HDL levels are positively correlated with the serum IgA specific for Mtb antigens. Analysis of the relationship between serum nutritional parameters and clinical parameters in TB patients showed that serum albumin and CRP levels were negatively correlated before treatment. We also observed reduced serum LDL levels in TB patients following treatment. These findings may provide insight into the role of serum lipids in host immune responses against Mtb infection. Furthermore, improving the nutritional status may enhance vaccination efficacy.
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18
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Wu Z, Wei W, Zhou Y, Guo H, Zhao J, Liao Q, Chen L, Zhang X, Zhou L. Integrated Quantitative Proteomics and Metabolome Profiling Reveal MSMEG_6171 Overexpression Perturbing Lipid Metabolism of Mycobacterium smegmatis Leading to Increased Vancomycin Resistance. Front Microbiol 2020; 11:1572. [PMID: 32793136 PMCID: PMC7393984 DOI: 10.3389/fmicb.2020.01572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 06/17/2020] [Indexed: 01/29/2023] Open
Abstract
In recent years, the treatment of tuberculosis is once again facing a severe situation because the existing antituberculosis drugs have become weaker and weaker with the emergence of drug-resistant Mycobacterium tuberculosis (Mtb). The studies of cell division and cell cycle-related factors in Mtb are particularly important for the development of new drugs with broad-spectrum effects. Mycobacterium smegmatis (Msm) has been used as a model organism to study the molecular, physiological, and drug-resistant mechanisms of Mtb. Bioinformatics analysis has predicted that MSMEG_6171 is a MinD-like protein of the septum site-determining protein family associated with cell division in Mycobacterium smegmatis. In our study, we use ultrastructural analysis, proteomics, metabolomics, and molecular biology techniques to comprehensively investigate the function of MSMEG_6171. Overexpression of MSMEG_6171 in Msm resulted in elongated cells, suggesting an important role of MSMEG_6171 in regulating cell wall morphology. The MSMEG_6171 overexpression could enhance the bacterial resistance to vancomycin, ethionamide, meropenem, and cefamandole. The MSMEG_6171 overexpression could alter the lipid metabolism of Msm to cause the changes on cellular biofilm property and function, which enhances bacterial resistance to antibiotics targeting cell wall synthesis. MSMEG_6171 could also induce the glyceride and phospholipid alteration in vivo to exhibit the pleiotropic phenotypes and various cellular responses. The results showed that amino acid R249 in MSMEG_6171 was a key site that can affect the level of bacterial drug resistance, suggesting that ATPase activity is required for function.
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Affiliation(s)
- Zhuhua Wu
- Key Laboratory of Translational Medicine of Guangdong, Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Wenjing Wei
- Key Laboratory of Translational Medicine of Guangdong, Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Ying Zhou
- School of Stomatology and Medicine, Foshan University, Foshan, China
| | - Huixin Guo
- Key Laboratory of Translational Medicine of Guangdong, Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Jiao Zhao
- School of Medicine, Jinan University, Guangzhou, China
| | - Qinghua Liao
- Key Laboratory of Translational Medicine of Guangdong, Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Liang Chen
- Key Laboratory of Translational Medicine of Guangdong, Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Xiaoli Zhang
- School of Stomatology and Medicine, Foshan University, Foshan, China
| | - Lin Zhou
- Key Laboratory of Translational Medicine of Guangdong, Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
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19
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Fenofibrate Facilitates Post-Active Tuberculosis Infection in Macrophages and is Associated with Higher Mortality in Patients under Long-Term Treatment. J Clin Med 2020; 9:jcm9020337. [PMID: 31991736 PMCID: PMC7073736 DOI: 10.3390/jcm9020337] [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: 12/21/2019] [Revised: 01/19/2020] [Accepted: 01/21/2020] [Indexed: 02/05/2023] Open
Abstract
Background: Mycobacterium tuberculosis (Mtb) is an intracellular pathogen that infects and persists in macrophages. This study aimed to investigate the effects of long-term fenofibrate treatment in patients with tuberculosis (TB), and the intracellular viability of Mtb in human macrophages. Methods: Epidemiological data from the National Health Insurance Research Database of Taiwan were used to present outcomes of TB patients treated with fenofibrate. In the laboratory, we assessed Mtb infection in macrophages treated with or without fenofibrate. Mtb growth, lipid accumulation in macrophages, and expression of transcriptional genes were examined. Results: During 11 years of follow-up, TB patients treated with fenofibrate presented a higher risk of mortality. Longer duration of fenofibrate use was associated with a significantly higher risk of mortality. Treatment with fenofibrate significantly increased the number of bacilli in human macrophages in vitro. Fenofibrate did not reduce, but induced an increasing trend in the intracellular lipid content of macrophages. In addition, dormant genes of Mtb, icl1, tgs1, and devR, were markedly upregulated in response to fenofibrate treatment. Our results suggest that fenofibrate may facilitate intracellular Mtb persistence. Conclusions: Our data shows that long-term treatment with fenofibrate in TB patients is associated with a higher mortality. The underlying mechanisms may partly be explained by the upregulation of Mtb genes involved in lipid metabolism, enhanced intracellular growth of Mtb, and the ability of Mtb to sustain a nutrient-rich reservoir in human macrophages, observed during treatment with fenofibrate.
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20
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Gordhan BG, Peters J, Kana BD. Application of model systems to study adaptive responses of Mycobacterium tuberculosis during infection and disease. ADVANCES IN APPLIED MICROBIOLOGY 2019; 108:115-161. [PMID: 31495404 DOI: 10.1016/bs.aambs.2019.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Tuberculosis (TB) claims more human lives than any other infectious organism. The lethal synergy between TB-HIV infection and the rapid emergence of drug resistant strains has created a global public health threat that requires urgent attention. Mycobacterium tuberculosis, the causative agent of TB is an exquisitely well-adapted human pathogen, displaying the ability to promptly remodel metabolism when encountering stressful environments during pathogenesis. A careful study of the mechanisms that enable this adaptation will enhance the understanding of key aspects related to the microbiology of TB disease. However, these efforts require microbiological model systems that mimic host conditions in the laboratory. Herein, we describe several in vitro model systems that generate non-replicating and differentially culturable mycobacteria. The changes that occur in the metabolism of M. tuberculosis in some of these models and how these relate to those reported for human TB disease are discussed. We describe mechanisms that tubercle bacteria use to resuscitate from these non-replicating conditions, together with phenotypic heterogeneity in terms of culturabiliy of M. tuberculosis in sputum. Transcriptional changes in M. tuberculosis that allow for adaptation of the organism to the lung environment are also summarized. Finally, given the emerging importance of the microbiome in various infectious diseases, we provide a description of how the lung and gut microbiome affect susceptibility to TB infection and response to treatment. Consideration of these collective aspects will enhance the understanding of basic metabolism, physiology, drug tolerance and persistence in M. tuberculosis to enable development of new therapeutic interventions.
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Affiliation(s)
- Bhavna Gowan Gordhan
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical TB Research, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand and the National Health Laboratory Service, Johannesburg, South Africa
| | - Julian Peters
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical TB Research, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand and the National Health Laboratory Service, Johannesburg, South Africa
| | - Bavesh Davandra Kana
- Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical TB Research, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand and the National Health Laboratory Service, Johannesburg, South Africa.
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21
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Mezouar S, Diarra I, Roudier J, Desnues B, Mege JL. Tumor Necrosis Factor-Alpha Antagonist Interferes With the Formation of Granulomatous Multinucleated Giant Cells: New Insights Into Mycobacterium tuberculosis Infection. Front Immunol 2019; 10:1947. [PMID: 31475008 PMCID: PMC6702871 DOI: 10.3389/fimmu.2019.01947] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 08/01/2019] [Indexed: 12/21/2022] Open
Abstract
More than half of tuberculosis cases in the world are due to resuscitation of dormant Mycobacterium tuberculosis (Mtb) sequestered into cell-derived structures called granulomas. It is fairly admitted that cytokines and more particularly Tumor Necrosis Factor (TNF)-α is critical in the control of Mtb infections and that anti-TNF-α drugs constitute one of the main risk factors for reactivation of latent Mtb infection. The aim of this study was to evaluate the role of etanercept, a dimeric fusion protein consisting of the extracellular ligand-binding portion of the human p75 TNF receptor linked to the Fc portion of human IgG1, in an in vitro model of human tuberculous granuloma. We showed that etanercept slightly delayed the formation of granuloma and reduced the generation of multinuclear giant cells (MGCs). In addition, etanercept exacerbated the expression of M1 polarization genes but also induced interleukin (IL)-10 release. In addition, our results indicated that etanercept inhibited cell fusion in an IL-10-dependent manner. Moreover, adalimumab, a human monoclonal anti-TNF-α IgG1 inhibited MGC formation in granuloma, without altering IL-10 secretion and induced macrophage apoptosis. Taken together, our data provides new insights into the role of TNF-α blockers in MGCs formation and the impact of such immunomodulatory drugs on tuberculous granuloma maturation.
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Affiliation(s)
- Soraya Mezouar
- Aix-Marseille Université, IRD, APHM, MEPHI, Marseille, France.,IHU-Méditerranée Infection, Marseille, France
| | - Issa Diarra
- Aix-Marseille Université, IRD, APHM, MEPHI, Marseille, France.,IHU-Méditerranée Infection, Marseille, France
| | - Jean Roudier
- Department of Rheumatology, Institut du Mouvement et de l'appareil Locomoteur, APHM, Marseille, France
| | - Benoit Desnues
- Aix-Marseille Université, IRD, APHM, MEPHI, Marseille, France.,IHU-Méditerranée Infection, Marseille, France
| | - Jean-Louis Mege
- Aix-Marseille Université, IRD, APHM, MEPHI, Marseille, France.,IHU-Méditerranée Infection, Marseille, France.,APHM, IHU Méditerranée Infection, UF Immunologie, Marseille, France
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22
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Kaur J, Kaur J. Rv0518, a nutritive stress inducible GDSL lipase of Mycobacterium tuberculosis, enhanced intracellular survival of bacteria by cell wall modulation. Int J Biol Macromol 2019; 135:180-195. [DOI: 10.1016/j.ijbiomac.2019.05.121] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 05/17/2019] [Accepted: 05/20/2019] [Indexed: 10/26/2022]
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23
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Santucci P, Johansen MD, Point V, Poncin I, Viljoen A, Cavalier JF, Kremer L, Canaan S. Nitrogen deprivation induces triacylglycerol accumulation, drug tolerance and hypervirulence in mycobacteria. Sci Rep 2019; 9:8667. [PMID: 31209261 PMCID: PMC6572852 DOI: 10.1038/s41598-019-45164-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 05/29/2019] [Indexed: 11/09/2022] Open
Abstract
Mycobacteria share with other actinomycetes the ability to produce large quantities of triacylglycerol (TAG), which accumulate as intracytoplasmic lipid inclusions (ILI) also known as lipid droplets (LD). Mycobacterium tuberculosis (M. tb), the etiologic agent of tuberculosis, acquires fatty acids from the human host which are utilized to synthesize TAG, subsequently stored in the form of ILI to meet the carbon and nutrient requirements of the bacterium during long periods of persistence. However, environmental factors governing mycobacterial ILI formation and degradation remain poorly understood. Herein, we demonstrated that in the absence of host cells, carbon excess and nitrogen starvation promote TAG accumulation in the form of ILI in M. smegmatis and M. abscessus, used as surrogate species of M. tb. Based on these findings, we developed a simple and reversible in vitro model to regulate ILI biosynthesis and hydrolysis in mycobacteria. We also showed that TAG formation is tgs1 dependent and that lipolytic enzymes mediate TAG breakdown. Moreover, we confirmed that the nitrogen-deprived and ILI-rich phenotype was associated with an increased tolerance towards several drugs used for treating mycobacterial infections. Importantly, we showed that the presence of ILI substantially enhanced the bacterial burden and granuloma abundance in zebrafish embryos infected with lipid-rich M. abscessus as compared to embryos infected with lipid-poor M. abscessus, suggesting that ILI are actively contributing to mycobacterial virulence and pathogenesis.
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Affiliation(s)
- Pierre Santucci
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
| | - Matt D Johansen
- Institut de Recherche en Infectiologie de Montpellier (IRIM), CNRS, UMR 9004, Université de Montpellier, 34293, Montpellier, France
| | - Vanessa Point
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
| | - Isabelle Poncin
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France
| | - Albertus Viljoen
- Institut de Recherche en Infectiologie de Montpellier (IRIM), CNRS, UMR 9004, Université de Montpellier, 34293, Montpellier, France
| | | | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier (IRIM), CNRS, UMR 9004, Université de Montpellier, 34293, Montpellier, France.,INSERM, IRIM, 34293, Montpellier, France
| | - Stéphane Canaan
- Aix-Marseille Univ, CNRS, LISM, IMM FR3479, Marseille, France.
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24
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Santucci P, Smichi N, Diomandé S, Poncin I, Point V, Gaussier H, Cavalier J, Kremer L, Canaan S. Dissecting the membrane lipid binding properties and lipase activity ofMycobacterium tuberculosisLipY domains. FEBS J 2019; 286:3164-3181. [DOI: 10.1111/febs.14864] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 03/25/2019] [Accepted: 04/25/2019] [Indexed: 12/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier (IRIM) CNRS UMR9004 Université de Montpellier France
- INSERM IRIM Montpellier France
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25
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Thirunavukkarasu S, Khader SA. Advances in Cardiovascular Disease Lipid Research Can Provide Novel Insights Into Mycobacterial Pathogenesis. Front Cell Infect Microbiol 2019; 9:116. [PMID: 31058102 PMCID: PMC6482252 DOI: 10.3389/fcimb.2019.00116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 04/02/2019] [Indexed: 12/17/2022] Open
Abstract
Cardiovascular disease (CVD) is the leading cause of death in industrialized nations and an emerging health problem in the developing world. Systemic inflammatory processes associated with alterations in lipid metabolism are a major contributing factor that mediates the development of CVDs, especially atherosclerosis. Therefore, the pathways promoting alterations in lipid metabolism and the interplay between varying cellular types, signaling agents, and effector molecules have been well-studied. Mycobacterial species are the causative agents of various infectious diseases in both humans and animals. Modulation of host lipid metabolism by mycobacteria plays a prominent role in its survival strategy within the host as well as in disease pathogenesis. However, there are still several knowledge gaps in the mechanistic understanding of how mycobacteria can alter host lipid metabolism. Considering the in-depth research available in the area of cardiovascular research, this review presents an overview of the parallel areas of research in host lipid-mediated immunological changes that might be extrapolated and explored to understand the underlying basis of mycobacterial pathogenesis.
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Affiliation(s)
- Shyamala Thirunavukkarasu
- Department of Molecular Microbiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Shabaana A Khader
- Department of Molecular Microbiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
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26
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Vrieling F, Wilson L, Rensen PCN, Walzl G, Ottenhoff THM, Joosten SA. Oxidized low-density lipoprotein (oxLDL) supports Mycobacterium tuberculosis survival in macrophages by inducing lysosomal dysfunction. PLoS Pathog 2019; 15:e1007724. [PMID: 30998773 PMCID: PMC6490946 DOI: 10.1371/journal.ppat.1007724] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 04/30/2019] [Accepted: 03/21/2019] [Indexed: 02/07/2023] Open
Abstract
Type 2 diabetes mellitus (DM) is a major risk factor for developing tuberculosis (TB). TB-DM comorbidity is expected to pose a serious future health problem due to the alarming rise in global DM incidence. At present, the causal underlying mechanisms linking DM and TB remain unclear. DM is associated with elevated levels of oxidized low-density lipoprotein (oxLDL), a pathologically modified lipoprotein which plays a key role during atherosclerosis development through the formation of lipid-loaded foamy macrophages, an event which also occurs during progression of the TB granuloma. We therefore hypothesized that oxLDL could be a common factor connecting DM to TB. To study this, we measured oxLDL levels in plasma samples of healthy controls, TB, DM and TB-DM patients, and subsequently investigated the effect of oxLDL treatment on human macrophage infection with Mycobacterium tuberculosis (Mtb). Plasma oxLDL levels were significantly elevated in DM patients and associated with high triglyceride levels in TB-DM. Strikingly, incubation with oxLDL strongly increased macrophage Mtb load compared to native or acetylated LDL (acLDL). Mechanistically, oxLDL -but not acLDL- treatment induced macrophage lysosomal cholesterol accumulation and increased protein levels of lysosomal and autophagy markers, while reducing Mtb colocalization with lysosomes. Importantly, combined treatment of acLDL and intracellular cholesterol transport inhibitor (U18666A) mimicked the oxLDL-induced lysosomal phenotype and impaired macrophage Mtb control, illustrating that the localization of lipid accumulation is critical. Collectively, these results demonstrate that oxLDL could be an important DM-associated TB-risk factor by causing lysosomal dysfunction and impaired control of Mtb infection in human macrophages. Tuberculosis (TB) is an infectious disease of the lungs caused by a bacterium, Mycobacterium tuberculosis (Mtb), and is responsible for over a million deaths per year worldwide. Population studies have demonstrated that type 2 diabetes mellitus (DM) is a risk factor for TB as it triples the risk of developing the disease. DM is a metabolic disorder which is generally associated with obesity, and is characterized by resistance to the pancreatic hormone insulin and high blood glucose and lipid levels. As the global incidence of DM is rising at an alarming rate, especially in regions where TB is common, it is important to understand precisely how DM increases the risk of developing TB. Both TB and DM are associated with the development of foamy macrophages, lipid-loaded white blood cells, which can be the result of a specific lipoprotein particle called oxidized low-density lipoprotein (oxLDL). Here, we demonstrated that DM patients have high blood levels of oxLDL, and generating foamy macrophages with oxLDL supported Mtb survival after infection as a result of faulty intracellular cholesterol accumulation. Our results propose a proof of concept for oxLDL as a risk factor for TB development, encouraging future studies on lipid-lowering therapies for TB-DM.
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Affiliation(s)
- Frank Vrieling
- Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, ZA Leiden, The Netherlands
| | - Louis Wilson
- Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, ZA Leiden, The Netherlands
| | - Patrick C. N. Rensen
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Albinusdreef 2, ZA Leiden, The Netherlands
| | - Gerhard Walzl
- DST/NRF Center of Excellence for Biomedical Tuberculosis Research, SA MRC Center for TB Research, Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences Stellenbosch University, Francie van Zijl Drive, Tygerberg, Cape Town, South Africa
| | - Tom H. M. Ottenhoff
- Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, ZA Leiden, The Netherlands
| | - Simone A. Joosten
- Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, ZA Leiden, The Netherlands
- * E-mail:
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27
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Verma S, Bhatt K, Lovey A, Ribeiro-Rodrigues R, Durbin J, Jones-López EC, Palaci M, Vinhas SA, Alland D, Dietze R, Ellner JJ, Salgame P. Transmission phenotype of Mycobacterium tuberculosis strains is mechanistically linked to induction of distinct pulmonary pathology. PLoS Pathog 2019; 15:e1007613. [PMID: 30840702 PMCID: PMC6422314 DOI: 10.1371/journal.ppat.1007613] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 03/18/2019] [Accepted: 02/02/2019] [Indexed: 12/19/2022] Open
Abstract
In a study of household contacts (HHC), households were categorized into High (HT) and Low (LT) transmission groups based on the proportion of HHC with a positive tuberculin skin test. The Mycobacterium tuberculosis (Mtb) strains from HT and LT index cases of the households were designated Mtb-HT and Mtb-LT, respectively. We found that C3HeB/FeJ mice infected with Mtb-LT strains exhibited significantly higher bacterial burden compared to Mtb-HT strains and also developed diffused inflammatory lung pathology. In stark contrast, a significant number of mice infected with Mtb-HT strains developed caseating granulomas, a lesion type with high potential to cavitate. None of the Mtb-HT infected animals developed diffused inflammatory lung pathology. A link was observed between increased in vitro replication of Mtb-LT strains and their ability to induce significantly high lipid droplet formation in macrophages. These results support that distinct early interactions of Mtb-HT and Mtb-LT strains with macrophages and subsequent differential trajectories in pathological disease may be the mechanism underlying their transmission potential.
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Affiliation(s)
- Sheetal Verma
- Rutgers University-New Jersey Medical School, Department of Medicine, Centre for Emerging Pathogens, Newark, New Jersey, United States of America
| | - Kamlesh Bhatt
- Rutgers University-New Jersey Medical School, Department of Medicine, Centre for Emerging Pathogens, Newark, New Jersey, United States of America
| | - Arianne Lovey
- Rutgers University-New Jersey Medical School, Department of Medicine, Centre for Emerging Pathogens, Newark, New Jersey, United States of America
| | - Rodrigo Ribeiro-Rodrigues
- Cellular and Molecular Immunology Laboratory, Núcleo de Doenças Infecciosas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Joan Durbin
- Rutgers University-New Jersey Medical School, Department of Pathology, Newark, New Jersey, United States of America
| | - Edward C. Jones-López
- Section of Infectious Diseases, Department of Medicine, Boston Medical Center and Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Moises Palaci
- Mycobacteriology Laboratory, Núcleo de Doenças de Infecciosas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - Solange A. Vinhas
- Mycobacteriology Laboratory, Núcleo de Doenças de Infecciosas, Universidade Federal do Espírito Santo, Vitória, Brazil
| | - David Alland
- Rutgers University-New Jersey Medical School, Department of Medicine, Centre for Emerging Pathogens, Newark, New Jersey, United States of America
| | - Reynaldo Dietze
- Núcleo de Doenças Infecciosas, Universidade Federal do Espírito Santo, Vitória, Brazil
- Global Health & Tropical Medicine, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisbon, Portugal
| | - Jerrold J. Ellner
- Section of Infectious Diseases, Department of Medicine, Boston Medical Center and Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Padmini Salgame
- Rutgers University-New Jersey Medical School, Department of Medicine, Centre for Emerging Pathogens, Newark, New Jersey, United States of America
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28
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Del Portillo P, García-Morales L, Menéndez MC, Anzola JM, Rodríguez JG, Helguera-Repetto AC, Ares MA, Prados-Rosales R, Gonzalez-y-Merchand JA, García MJ. Hypoxia Is Not a Main Stress When Mycobacterium tuberculosis Is in a Dormancy-Like Long-Chain Fatty Acid Environment. Front Cell Infect Microbiol 2019; 8:449. [PMID: 30687646 PMCID: PMC6333855 DOI: 10.3389/fcimb.2018.00449] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 12/18/2018] [Indexed: 12/12/2022] Open
Abstract
The capacity of Mycobacterium tuberculosis (Mtb) to sense, respond and adapt to a variable and hostile environment within the host makes it one of the most successful human pathogens. During different stages of infection, Mtb is surrounded by a plethora of lipid molecules and current evidence points out the relevance of fatty acids during the infectious process. In this study, we have compared the transcriptional response of Mtb to hypoxia in cultures supplemented with a mix of even long-chain fatty acids or dextrose as main carbon sources. Using RNA sequencing, we have identified differential expressed genes in early and late hypoxia, defined according to the in vitro Wayne and Hayes model, and compared the results with the exponential phase of growth in both carbon sources. We show that the number of genes over-expressed in the lipid medium was quite low in both, early and late hypoxia, relative to conditions including dextrose, with the exception of transcripts of stable and non-coding RNAs, which were more expressed in the fatty acid medium. We found that sigB and sigE were over-expressed in the early phase of hypoxia, confirming their pivotal role in early adaptation to low oxygen concentration independently of the carbon source. A drastic contrast was found with the transcriptional regulatory factors at early hypoxia. Only 2 transcriptional factors were over-expressed in early hypoxia in the lipid medium compared to 37 that were over-expressed in the dextrose medium. Instead of Rv0081, known to be the central regulator of hypoxia in dextrose, Rv2745c (ClgR), seems to play a main role in hypoxia in the fatty acid medium. The low level of genes associated to the stress-response during their adaptation to hypoxia in fatty acids, suggests that this lipid environment makes hypoxia a less stressful condition for the tubercle bacilli. Taken all together, these results indicate that the presence of lipid molecules shapes the metabolic response of Mtb to an adaptive state for different stresses within the host, including hypoxia. This fact could explain the success of Mtb to establish long-term survival during latent infection.
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Affiliation(s)
- Patricia Del Portillo
- Departamento de Biotecnología Molecular y Biología Computacional y Bioinformática, Corporación CorpoGen, Bogotá, Colombia
| | - Lázaro García-Morales
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Ciudad de México, Mexico
| | - María Carmen Menéndez
- Departamento de Medicina Preventiva, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Juan Manuel Anzola
- Departamento de Biotecnología Molecular y Biología Computacional y Bioinformática, Corporación CorpoGen, Bogotá, Colombia
| | - Juan Germán Rodríguez
- Departamento de Biotecnología Molecular y Biología Computacional y Bioinformática, Corporación CorpoGen, Bogotá, Colombia
| | - Addy Cecilia Helguera-Repetto
- Departamento de Inmunobioquímica, Torre de Investigación, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México, Mexico
| | - Miguel A. Ares
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, Mexico
| | - Rafael Prados-Rosales
- Departamento de Medicina Preventiva, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
- Center for Cooperative Research bioGUNE (CICbioGUNE), Bizkaia Technology Park, Derio, Spain
| | - Jorge A. Gonzalez-y-Merchand
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - María Jesús García
- Departamento de Medicina Preventiva, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
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29
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Li Y, Spiropoulos J, Cooley W, Khara JS, Gladstone CA, Asai M, Bossé JT, Robertson BD, Newton SM, Langford PR. Galleria mellonella - a novel infection model for the Mycobacterium tuberculosis complex. Virulence 2018; 9:1126-1137. [PMID: 30067135 PMCID: PMC6086298 DOI: 10.1080/21505594.2018.1491255] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Animal models have long been used in tuberculosis research to understand disease pathogenesis and to evaluate novel vaccine candidates and anti-mycobacterial drugs. However, all have limitations and there is no single animal model which mimics all the aspects of mycobacterial pathogenesis seen in humans. Importantly mice, the most commonly used model, do not normally form granulomas, the hallmark of tuberculosis infection. Thus there is an urgent need for the development of new alternative in vivo models. The insect larvae, Galleria mellonella has been increasingly used as a successful, simple, widely available and cost-effective model to study microbial infections. Here we report for the first time that G. mellonella can be used as an infection model for members of the Mycobacterium tuberculosis complex. We demonstrate a dose-response for G. mellonella survival infected with different inocula of bioluminescent Mycobacterium bovis BCG lux, and demonstrate suppression of mycobacterial luminesence over 14 days. Histopathology staining and transmission electron microscopy of infected G. mellonella phagocytic haemocytes show internalization and aggregation of M. bovis BCG lux in granuloma-like structures, and increasing accumulation of lipid bodies within M. bovis BCG lux over time, characteristic of latent tuberculosis infection. Our results demonstrate that G. mellonella can act as a surrogate host to study the pathogenesis of mycobacterial infection and shed light on host-mycobacteria interactions, including latent tuberculosis infection.
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Affiliation(s)
- Yanwen Li
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK
| | - John Spiropoulos
- b Department of Pathology , Animal and Plant Health Agency , Addlestone , UK
| | - William Cooley
- b Department of Pathology , Animal and Plant Health Agency , Addlestone , UK
| | - Jasmeet Singh Khara
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK.,c Department of Pharmacy , National University of Singapore , Singapore
| | - Camilla A Gladstone
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK
| | - Masanori Asai
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK
| | - Janine T Bossé
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK
| | - Brian D Robertson
- d MRC Centre for Molecular Bacteriology and Infection, Department of Medicine , Imperial College London , London , UK
| | - Sandra M Newton
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK
| | - Paul R Langford
- a Section of Paediatric Infectious Diseases and Allergy, Department of Medicine , Imperial College London , London , UK
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30
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Rameshwaram NR, Singh P, Ghosh S, Mukhopadhyay S. Lipid metabolism and intracellular bacterial virulence: key to next-generation therapeutics. Future Microbiol 2018; 13:1301-1328. [DOI: 10.2217/fmb-2018-0013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Lipid metabolism is thought to play a key role in the pathogenicity of several intracellular bacteria. Bacterial lipolytic enzymes hydrolyze lipids from the host cell to release free fatty acids which are used as an energy source and building blocks for the synthesis of cell envelope and also to modulate host immune responses. In this review, we discussed the role of lipid metabolism and lipolytic enzymes in the life cycle and virulence of Mycobacterium tuberculosis and other intracellular bacteria. The lipolytic enzymes appear to be potential candidates for developing novel therapeutics by targeting lipid metabolism for controlling M. tuberculosis and other intracellular pathogenic bacteria. [Formula: see text]
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Affiliation(s)
- Nagender Rao Rameshwaram
- Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting & Diagnostics (CDFD), Inner Ring Road, Uppal, Hyderabad, India. 500 039
| | - Parul Singh
- Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting & Diagnostics (CDFD), Inner Ring Road, Uppal, Hyderabad, India. 500 039
- Graduate Studies, Manipal University, Manipal, Karnataka, India. 576 104
| | - Sudip Ghosh
- Molecular Biology Division, National Institute of Nutrition (ICMR), Jamai-Osmania PO, Hyderabad, India. 500 007
| | - Sangita Mukhopadhyay
- Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting & Diagnostics (CDFD), Inner Ring Road, Uppal, Hyderabad, India. 500 039
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31
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Oxadiazolone derivatives, new promising multi-target inhibitors against M. tuberculosis. Bioorg Chem 2018; 81:414-424. [PMID: 30212765 DOI: 10.1016/j.bioorg.2018.08.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/17/2018] [Accepted: 08/20/2018] [Indexed: 11/22/2022]
Abstract
A set of 19 oxadiazolone (OX) derivatives have been investigated for their antimycobacterial activity against two pathogenic slow-growing mycobacteria, Mycobacterium marinum and Mycobacterium bovis BCG, and the avirulent Mycobacterium tuberculosis (M. tb) mc26230. The encouraging minimal inhibitory concentrations (MIC) values obtained prompted us to test them against virulent M. tb H37Rv growth either in broth medium or inside macrophages. The OX compounds displayed a diversity of action and were found to act either on extracellular M. tb growth only with moderated MIC50, or both intracellularly on infected macrophages as well as extracellularly on bacterial growth. Of interest, all OX derivatives exhibited very low toxicity towards host macrophages. Among the six potential OXs identified, HPOX, a selective inhibitor of extracellular M. tb growth, was selected and further used in a competitive labelling/enrichment assay against the activity-based probe Desthiobiotin-FP, in order to identify its putative target(s). This approach, combined with mass spectrometry, identified 18 potential candidates, all being serine or cysteine enzymes involved in M. tb lipid metabolism and/or in cell wall biosynthesis. Among them, Ag85A, CaeA, TesA, KasA and MetA have been reported as essential for in vitro growth of M. tb and/or its survival and persistence inside macrophages. Overall, our findings support the assumption that OX derivatives may represent a novel class of multi-target inhibitors leading to the arrest of M. tb growth through a cumulative inhibition of a large number of Ser- and Cys-containing enzymes involved in various important physiological processes.
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32
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Delineating the Physiological Roles of the PE and Catalytic Domains of LipY in Lipid Consumption in Mycobacterium-Infected Foamy Macrophages. Infect Immun 2018; 86:IAI.00394-18. [PMID: 29986895 DOI: 10.1128/iai.00394-18] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 07/03/2018] [Indexed: 12/29/2022] Open
Abstract
Within tuberculous granulomas, a subpopulation of Mycobacterium tuberculosis resides inside foamy macrophages (FM) that contain abundant cytoplasmic lipid bodies (LB) filled with triacylglycerol (TAG). Upon fusion of LB with M. tuberculosis-containing phagosomes, TAG is hydrolyzed and reprocessed by the bacteria into their own lipids, which accumulate as intracytosolic lipid inclusions (ILI). This phenomenon is driven by many mycobacterial lipases, among which LipY participates in the hydrolysis of host and bacterial TAG. However, the functional contribution of LipY's PE domain to TAG hydrolysis remains unclear. Here, enzymatic studies were performed to compare the lipolytic activities of recombinant LipY and its truncated variant lacking the N-terminal PE domain, LipY(ΔPE). Complementarily, an FM model was used where bone marrow-derived mouse macrophages were infected with M. bovis BCG strains either overexpressing LipY or LipY(ΔPE) or carrying a lipY deletion mutation prior to being exposed to TAG-rich very-low-density lipoprotein (VLDL). Results indicate that truncation of the PE domain correlates with increased TAG hydrolase activity. Quantitative electron microscopy analyses showed that (i) in the presence of lipase inhibitors, large ILI (ILI+3) were not formed because of an absence of LB due to inhibition of VLDL-TAG hydrolysis or inhibition of LB-neutral lipid hydrolysis by mycobacterial lipases, (ii) ILI+3 profiles in the strain overexpressing LipY(ΔPE) were reduced, and (iii) the number of ILI+3 profiles in the ΔlipY mutant was reduced by 50%. Overall, these results delineate the role of LipY and its PE domain in host and mycobacterial lipid consumption and show that additional mycobacterial lipases take part in these processes.
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Aschauer P, Zimmermann R, Breinbauer R, Pavkov-Keller T, Oberer M. The crystal structure of monoacylglycerol lipase from M. tuberculosis reveals the basis for specific inhibition. Sci Rep 2018; 8:8948. [PMID: 29895832 PMCID: PMC5997763 DOI: 10.1038/s41598-018-27051-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 05/25/2018] [Indexed: 01/20/2023] Open
Abstract
Monoacylglycerol lipases (MGLs) are enzymes that hydrolyze monoacylglycerol into a free fatty acid and glycerol. Fatty acids can be used for triacylglycerol synthesis, as energy source, as building blocks for energy storage, and as precursor for membrane phospholipids. In Mycobacterium tuberculosis, fatty acids also serve as precursor for polyketide lipids like mycolic acids, major components of the cellular envelope associated to resistance for drug. We present the crystal structure of the MGL Rv0183 from Mycobacterium tuberculosis (mtbMGL) in open conformation. The structure reveals remarkable similarities with MGL from humans (hMGL) in both, the cap region and the α/β core. Nevertheless, mtbMGL could not be inhibited with JZL-184, a known inhibitor of hMGL. Docking studies provide an explanation why the activity of mtbMGL was not affected by the inhibitor. Our findings suggest that specific inhibition of mtbMGL from Mycobacterium tuberculosis, one of the oldest recognized pathogens, is possible without influencing hMGL.
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Affiliation(s)
- Philipp Aschauer
- Institute of Molecular Biosciences, University of Graz, Humboldtstraße 50/3, 8010, Graz, Austria
| | - Robert Zimmermann
- Institute of Molecular Biosciences, University of Graz, Humboldtstraße 50/3, 8010, Graz, Austria.,BioTechMed-Graz, Mozartgasse 12/II, 8010, Graz, Austria
| | - Rolf Breinbauer
- BioTechMed-Graz, Mozartgasse 12/II, 8010, Graz, Austria.,Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria
| | - Tea Pavkov-Keller
- Institute of Molecular Biosciences, University of Graz, Humboldtstraße 50/3, 8010, Graz, Austria
| | - Monika Oberer
- Institute of Molecular Biosciences, University of Graz, Humboldtstraße 50/3, 8010, Graz, Austria. .,BioTechMed-Graz, Mozartgasse 12/II, 8010, Graz, Austria.
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Bothra A, Arumugam P, Panchal V, Menon D, Srivastava S, Shankaran D, Nandy A, Jaisinghani N, Singh A, Gokhale RS, Gandotra S, Rao V. Phospholipid homeostasis, membrane tenacity and survival of Mtb in lipid rich conditions is determined by MmpL11 function. Sci Rep 2018; 8:8317. [PMID: 29844505 PMCID: PMC5974182 DOI: 10.1038/s41598-018-26710-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 05/18/2018] [Indexed: 11/09/2022] Open
Abstract
The mycobacterial cell wall is a chemically complex array of molecular entities that dictate the pathogenesis of Mycobacterium tuberculosis. Biosynthesis and maintenance of this dynamic entity in mycobacterial physiology is still poorly understood. Here we demonstrate a requirement for M. tuberculosis MmpL11 in the maintenance of the cell wall architecture and stability in response to surface stress. In the presence of a detergent like Tyloxapol, a mmpL11 deletion mutant suffered from a severe growth attenuation as a result of altered membrane polarity, permeability and severe architectural damages. This mutant failed to tolerate permissible concentrations of cis-fatty acids suggesting its increased sensitivity to surface stress, evident as smaller colonies of the mutant outgrown from lipid rich macrophage cultures. Additionally, loss of MmpL11 led to an altered cellular fatty acid flux in the mutant: reduced incorporation into membrane cardiolipin was associated with an increased flux into the cellular triglyceride pool. This increase in storage lipids like triacyl glycerol (TAG) was associated with the altered metabolic state of higher dormancy-associated gene expression and decreased sensitivity to frontline TB drugs. This study provides a detailed mechanistic insight into the function of mmpL11 in stress adaptation of mycobacteria.
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Affiliation(s)
- Ankur Bothra
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | | | - Vipul Panchal
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | - Dilip Menon
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | - Sonali Srivastava
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | - Deepthi Shankaran
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | - Ananya Nandy
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | | | - Archana Singh
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India
| | - Rajesh S Gokhale
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India.,Academy of Scientific and Innovative Research, CSIR-Central Road Research Institute, New Delhi, India.,National Institute of Immunology, New Delhi, India
| | - Sheetal Gandotra
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India.,Academy of Scientific and Innovative Research, CSIR-Central Road Research Institute, New Delhi, India
| | - Vivek Rao
- CSIR- Institute of Genomics and Integrative Biology, New Delhi, India. .,Academy of Scientific and Innovative Research, CSIR-Central Road Research Institute, New Delhi, India.
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35
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Woo M, Wood C, Kwon D, Park KHP, Fejer G, Delorme V. Mycobacterium tuberculosis Infection and Innate Responses in a New Model of Lung Alveolar Macrophages. Front Immunol 2018; 9:438. [PMID: 29593716 PMCID: PMC5858468 DOI: 10.3389/fimmu.2018.00438] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 02/19/2018] [Indexed: 12/23/2022] Open
Abstract
Lung alveolar macrophages (AMs) are in the first line of immune defense against respiratory pathogens and play key roles in the pathogenesis of Mycobacterium tuberculosis (Mtb) in humans. Nevertheless, AMs are available only in limited amounts for in vitro studies, which hamper the detailed molecular understanding of host-Mtb interactions in these macrophages. The recent establishment of the self-renewing and primary Max Planck Institute (MPI) cells, functionally very close to lung AMs, opens unique opportunities for in vitro studies of host-pathogen interactions in respiratory diseases. Here, we investigated the suitability of MPI cells as a host cell system for Mtb infection. Bacterial, cellular, and innate immune features of MPI cells infected with Mtb were characterized. Live bacteria were readily internalized and efficiently replicated in MPI cells, similarly to primary murine macrophages and other cell lines. MPI cells were also suitable for the determination of anti-tuberculosis (TB) drug activity. The primary innate immune response of MPI cells to live Mtb showed significantly higher and earlier induction of the pro-inflammatory cytokines TNFα, interleukin 6 (IL-6), IL-1α, and IL-1β, as compared to stimulation with heat-killed (HK) bacteria. MPI cells previously showed a lack of induction of the anti-inflammatory cytokine IL-10 to a wide range of stimuli, including HK Mtb. By contrast, we show here that live Mtb is able to induce significant amounts of IL-10 in MPI cells. Autophagy experiments using light chain 3B immunostaining, as well as LysoTracker labeling of acidic vacuoles, demonstrated that MPI cells efficiently control killed Mtb by elimination through phagolysosomes. MPI cells were also able to accumulate lipid droplets in their cytoplasm following exposure to lipoproteins. Collectively, this study establishes the MPI cells as a relevant, versatile host cell model for TB research, allowing a deeper understanding of AMs functions in this pathology.
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Affiliation(s)
- Minjeong Woo
- Tuberculosis Research Laboratory, Institut Pasteur Korea, Seongnam, South Korea
| | - Connor Wood
- School of Biomedical and Healthcare Sciences, Peninsula Schools of Medicine and Dentistry, Plymouth University, Plymouth, United Kingdom
| | - Doyoon Kwon
- Tuberculosis Research Laboratory, Institut Pasteur Korea, Seongnam, South Korea
| | - Kyu-Ho Paul Park
- Applied Molecular Virology, Institut Pasteur Korea, Seongnam, South Korea
| | - György Fejer
- School of Biomedical and Healthcare Sciences, Peninsula Schools of Medicine and Dentistry, Plymouth University, Plymouth, United Kingdom
| | - Vincent Delorme
- Tuberculosis Research Laboratory, Institut Pasteur Korea, Seongnam, South Korea
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Genoula M, Marín Franco JL, Dupont M, Kviatcovsky D, Milillo A, Schierloh P, Moraña EJ, Poggi S, Palmero D, Mata-Espinosa D, González-Domínguez E, León Contreras JC, Barrionuevo P, Rearte B, Córdoba Moreno MO, Fontanals A, Crotta Asis A, Gago G, Cougoule C, Neyrolles O, Maridonneau-Parini I, Sánchez-Torres C, Hernández-Pando R, Vérollet C, Lugo-Villarino G, Sasiain MDC, Balboa L. Formation of Foamy Macrophages by Tuberculous Pleural Effusions Is Triggered by the Interleukin-10/Signal Transducer and Activator of Transcription 3 Axis through ACAT Upregulation. Front Immunol 2018; 9:459. [PMID: 29593722 PMCID: PMC5854656 DOI: 10.3389/fimmu.2018.00459] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 02/20/2018] [Indexed: 12/18/2022] Open
Abstract
The ability of Mycobacterium tuberculosis (Mtb) to persist in its human host relies on numerous immune evasion strategies, such as the deregulation of the lipid metabolism leading to the formation of foamy macrophages (FM). Yet, the specific host factors leading to the foamy phenotype of Mtb-infected macrophages remain unknown. Herein, we aimed to address whether host cytokines contribute to FM formation in the context of Mtb infection. Our approach is based on the use of an acellular fraction of tuberculous pleural effusions (TB-PE) as a physiological source of local factors released during Mtb infection. We found that TB-PE induced FM differentiation as observed by the increase in lipid bodies, intracellular cholesterol, and expression of the scavenger receptor CD36, as well as the enzyme acyl CoA:cholesterol acyl transferase (ACAT). Importantly, interleukin-10 (IL-10) depletion from TB-PE prevented the augmentation of all these parameters. Moreover, we observed a positive correlation between the levels of IL-10 and the number of lipid-laden CD14+ cells among the pleural cells in TB patients, demonstrating that FM differentiation occurs within the pleural environment. Downstream of IL-10 signaling, we noticed that the transcription factor signal transducer and activator of transcription 3 was activated by TB-PE, and its chemical inhibition prevented the accumulation of lipid bodies and ACAT expression in macrophages. In terms of the host immune response, TB-PE-treated macrophages displayed immunosuppressive properties and bore higher bacillary loads. Finally, we confirmed our results using bone marrow-derived macrophage from IL-10-/- mice demonstrating that IL-10 deficiency partially prevented foamy phenotype induction after Mtb lipids exposure. In conclusion, our results evidence a role of IL-10 in promoting the differentiation of FM in the context of Mtb infection, contributing to our understanding of how alterations of the host metabolic factors may favor pathogen persistence.
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Affiliation(s)
- Melanie Genoula
- Laboratorio de Inmunología de Enfermedades Respiratorias, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina
| | - José Luis Marín Franco
- Laboratorio de Inmunología de Enfermedades Respiratorias, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina
| | - Maeva Dupont
- International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina.,Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Denise Kviatcovsky
- Laboratorio de Inmunología de Enfermedades Respiratorias, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina
| | - Ayelén Milillo
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Pablo Schierloh
- Laboratorio de Inmunología de Enfermedades Respiratorias, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina
| | - Eduardo Jose Moraña
- Instituto Prof. Dr. Raúl Vaccarezza, Hospital de Infecciosas Dr. F. J. Muñiz, Buenos Aires, Argentina
| | - Susana Poggi
- Instituto Prof. Dr. Raúl Vaccarezza, Hospital de Infecciosas Dr. F. J. Muñiz, Buenos Aires, Argentina
| | - Domingo Palmero
- Instituto Prof. Dr. Raúl Vaccarezza, Hospital de Infecciosas Dr. F. J. Muñiz, Buenos Aires, Argentina
| | - Dulce Mata-Espinosa
- Sección de Patología Experimental, Departamento de Patología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Erika González-Domínguez
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Juan Carlos León Contreras
- Sección de Patología Experimental, Departamento de Patología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Paula Barrionuevo
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Bárbara Rearte
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Marlina Olyissa Córdoba Moreno
- Laboratorio de Fisiología de los Procesos Inflamatorios, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina
| | | | - Agostina Crotta Asis
- Laboratory of Physiology and Genetics of Actinomycetes, Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Gabriela Gago
- Laboratory of Physiology and Genetics of Actinomycetes, Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Céline Cougoule
- International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina.,Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Olivier Neyrolles
- International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina.,Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Isabelle Maridonneau-Parini
- International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina.,Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Carmen Sánchez-Torres
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Rogelio Hernández-Pando
- Sección de Patología Experimental, Departamento de Patología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Christel Vérollet
- International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina.,Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Geanncarlo Lugo-Villarino
- International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina.,Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - María Del Carmen Sasiain
- Laboratorio de Inmunología de Enfermedades Respiratorias, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina
| | - Luciana Balboa
- Laboratorio de Inmunología de Enfermedades Respiratorias, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Toulouse, France.,International Associated Laboratory (LIA) CNRS IM-TB/HIV (1167), Buenos Aires, Argentina
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Ufimtseva E, Eremeeva N, Petrunina E, Umpeleva T, Karskanova S, Bayborodin S, Vakhrusheva D, Kravchenko M, Skornyakov S. Ex vivo expansion of alveolar macrophages with Mycobacterium tuberculosis from the resected lungs of patients with pulmonary tuberculosis. PLoS One 2018; 13:e0191918. [PMID: 29401466 PMCID: PMC5798839 DOI: 10.1371/journal.pone.0191918] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 01/12/2018] [Indexed: 11/19/2022] Open
Abstract
Tuberculosis (TB), with the Mycobacterium tuberculosis (Mtb) as the causative agent, remains to be a serious world health problem. Traditional methods used for the study of Mtb in the lungs of TB patients do not provide information about the number and functional status of Mtb, especially if Mtb are located in alveolar macrophages. We have developed a technique to produce ex vivo cultures of cells from different parts of lung tissues surgically removed from patients with pulmonary TB and compared data on the number of cells with Mtb inferred by the proposed technique to the results of bacteriological and histological analyses used for examination of the resected lungs. The ex vivo cultures of cells obtained from the resected lungs of all patients were largely composed of CD14-positive alveolar macrophages, foamy or not, with or without Mtb. Lymphocytes, fibroblasts, neutrophils, and multinucleate Langhans giant cells were also observed. We found alveolar macrophages with Mtb in the ex vivo cultures of cells from the resected lungs of even those TB patients, whose sputum smears and lung tissues did not contain acid-fast Mtb or reveal growing Mtb colonies on dense medium. The detection of alveolar macrophages with Mtb in ex vivo culture as soon as 16-18 h after isolation of cells from the resected lungs of all TB patients suggests that the technique proposed for assessing the level of infection in alveolar macrophages of TB patients has higher sensitivity than do prolonged bacteriological or pathomorphological methods. The proposed technique allowed us to rapidly (in two days after surgery) determine the level of infection with Mtb in the cells of the resected lungs of TB patients and, by the presence or absence of Mtb colonies, including those with cording morphology, the functional status of the TB agent at the time of surgery.
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Affiliation(s)
- Elena Ufimtseva
- Laboratory of Medical Biotechnology, Research Institute of Biochemistry, Novosibirsk, Russia
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Natalya Eremeeva
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Ekaterina Petrunina
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Tatiana Umpeleva
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Svetlana Karskanova
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Sergey Bayborodin
- Shared Center for Microscopic Analysis of Biological Objects, Federal Research Center Institute of Cytology and Genetics, Novosibirsk, Russia
| | - Diana Vakhrusheva
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Marionella Kravchenko
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
| | - Sergey Skornyakov
- Scientific Department, Ural Research Institute for Phthisiopulmonology, National Medical Research Center of Tuberculosis and Infectious Diseases of Ministry of Health of the Russian Federation, Yekaterinburg, Russia
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Viljoen A, Richard M, Nguyen PC, Fourquet P, Camoin L, Paudal RR, Gnawali GR, Spilling CD, Cavalier JF, Canaan S, Blaise M, Kremer L. Cyclipostins and cyclophostin analogs inhibit the antigen 85C from Mycobacterium tuberculosis both in vitro and in vivo. J Biol Chem 2018; 293:2755-2769. [PMID: 29301937 DOI: 10.1074/jbc.ra117.000760] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/05/2017] [Indexed: 12/27/2022] Open
Abstract
An increasing prevalence of cases of drug-resistant tuberculosis requires the development of more efficacious chemotherapies. We previously reported the discovery of a new class of cyclipostins and cyclophostin (CyC) analogs exhibiting potent activity against Mycobacterium tuberculosis both in vitro and in infected macrophages. Competitive labeling/enrichment assays combined with MS have identified several serine or cysteine enzymes in lipid and cell wall metabolism as putative targets of these CyC compounds. These targets included members of the antigen 85 (Ag85) complex (i.e. Ag85A, Ag85B, and Ag85C), responsible for biosynthesis of trehalose dimycolate and mycolylation of arabinogalactan. Herein, we used biochemical and structural approaches to validate the Ag85 complex as a pharmacological target of the CyC analogs. We found that CyC7β, CyC8β, and CyC17 bind covalently to the catalytic Ser124 residue in Ag85C; inhibit mycolyltransferase activity (i.e. the transfer of a fatty acid molecule onto trehalose); and reduce triacylglycerol synthase activity, a property previously attributed to Ag85A. Supporting these results, an X-ray structure of Ag85C in complex with CyC8β disclosed that this inhibitor occupies Ag85C's substrate-binding pocket. Importantly, metabolic labeling of M. tuberculosis cultures revealed that the CyC compounds impair both trehalose dimycolate synthesis and mycolylation of arabinogalactan. Overall, our study provides compelling evidence that CyC analogs can inhibit the activity of the Ag85 complex in vitro and in mycobacteria, opening the door to a new strategy for inhibiting Ag85. The high-resolution crystal structure obtained will further guide the rational optimization of new CyC scaffolds with greater specificity and potency against M. tuberculosis.
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Affiliation(s)
- Albertus Viljoen
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR9004, 34293 Montpellier, France
| | - Matthias Richard
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR9004, 34293 Montpellier, France
| | - Phuong Chi Nguyen
- Aix-Marseille Université, CNRS, EIPL, IMM FR3479, 13009 Marseille, France; Aix-Marseille Université, CNRS, LISM, IMM FR3479, 13009 Marseille, France
| | - Patrick Fourquet
- Aix Marseille Université, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, 13009 Marseille, France
| | - Luc Camoin
- Aix Marseille Université, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille Protéomique, 13009 Marseille, France
| | - Rishi R Paudal
- Department of Chemistry and Biochemistry, University of Missouri, St. Louis, Missouri 63121
| | - Giri R Gnawali
- Department of Chemistry and Biochemistry, University of Missouri, St. Louis, Missouri 63121
| | - Christopher D Spilling
- Department of Chemistry and Biochemistry, University of Missouri, St. Louis, Missouri 63121
| | - Jean-François Cavalier
- Aix-Marseille Université, CNRS, EIPL, IMM FR3479, 13009 Marseille, France; Aix-Marseille Université, CNRS, LISM, IMM FR3479, 13009 Marseille, France
| | - Stéphane Canaan
- Aix-Marseille Université, CNRS, EIPL, IMM FR3479, 13009 Marseille, France; Aix-Marseille Université, CNRS, LISM, IMM FR3479, 13009 Marseille, France
| | - Mickael Blaise
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR9004, 34293 Montpellier, France.
| | - Laurent Kremer
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS UMR9004, 34293 Montpellier, France; INSERM, IRIM, 34293 Montpellier, France.
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Daniel J, Abraham L, Martin A, Pablo X, Reyes S. Rv2477c is an antibiotic-sensitive manganese-dependent ABC-F ATPase in Mycobacterium tuberculosis. Biochem Biophys Res Commun 2018; 495:35-40. [DOI: 10.1016/j.bbrc.2017.10.168] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
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40
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Cyclipostins and Cyclophostin analogs as promising compounds in the fight against tuberculosis. Sci Rep 2017; 7:11751. [PMID: 28924204 PMCID: PMC5603573 DOI: 10.1038/s41598-017-11843-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 08/30/2017] [Indexed: 01/01/2023] Open
Abstract
A new class of Cyclophostin and Cyclipostins (CyC) analogs have been investigated against Mycobacterium tuberculosis H37Rv (M. tb) grown either in broth medium or inside macrophages. Our compounds displayed a diversity of action by acting either on extracellular M. tb bacterial growth only, or both intracellularly on infected macrophages as well as extracellularly on bacterial growth with very low toxicity towards host macrophages. Among the eight potential CyCs identified, CyC17 exhibited the best extracellular antitubercular activity (MIC50 = 500 nM). This compound was selected and further used in a competitive labelling/enrichment assay against the activity-based probe Desthiobiotin-FP in order to identify its putative target(s). This approach, combined with mass spectrometry, identified 23 potential candidates, most of them being serine or cysteine enzymes involved in M. tb lipid metabolism and/or in cell wall biosynthesis. Among them, Ag85A, CaeA and HsaD, have previously been reported as essential for in vitro growth of M. tb and/or survival and persistence in macrophages. Overall, our findings support the assumption that CyC17 may thus represent a novel class of multi-target inhibitor leading to the arrest of M. tb growth through a cumulative inhibition of a large number of Ser- and Cys-containing enzymes participating in important physiological processes.
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Kammüller M, Tsai TF, Griffiths CE, Kapoor N, Kolattukudy PE, Brees D, Chibout SD, Safi J, Fox T. Inhibition of IL-17A by secukinumab shows no evidence of increased Mycobacterium tuberculosis infections. Clin Transl Immunology 2017; 6:e152. [PMID: 28868144 PMCID: PMC5579471 DOI: 10.1038/cti.2017.34] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 06/30/2017] [Accepted: 07/02/2017] [Indexed: 12/25/2022] Open
Abstract
Secukinumab, a fully human monoclonal antibody that selectively neutralizes interleukin-17A (IL-17A), has been shown to have significant efficacy in the treatment of moderate to severe psoriasis, psoriatic arthritis and ankylosing spondylitis. Blocking critical mediators of immunity may carry a risk of increased opportunistic infections. Here we present clinical and in vitro findings examining the effect of secukinumab on Mycobacterium tuberculosis infection. We re-assessed the effect of secukinumab on the incidence of acute tuberculosis (TB) and reactivation of latent TB infection (LTBI) in pooled safety data from five randomized, double-blind, placebo-controlled, phase 3 clinical trials in subjects with moderate to severe plaque psoriasis. No cases of TB were observed after 1 year. Importantly, in subjects with a history of pulmonary TB (but negative for interferon-γ release and receiving no anti-TB medication) or positive for latent TB (screened by interferon-γ release assay and receiving anti-TB medication), no cases of active TB were reported. Moreover, an in vitro study examined the effect of the anti-tumor necrosis factor-α (TNFα) antibody adalimumab and secukinumab on dormant M. tuberculosis H37Rv in a novel human three-dimensional microgranuloma model. Auramine-O, Nile red staining and rifampicin resistance of M. tuberculosis were measured. In vitro, anti-TNFα treatment showed increased staining for Auramine-O, decreased Nile red staining and decreased rifampicin resistance, indicative of mycobacterial reactivation. In contrast, secukinumab treatment was comparable to control indicating a lack of effect on M. tuberculosis dormancy. To date, clinical and preclinical investigations with secukinumab found no evidence of increased M. tuberculosis infections.
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Affiliation(s)
- Michael Kammüller
- Translational Medicine-Preclinical Safety, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Tsen-Fang Tsai
- Department of Dermatology, National Taiwan University Hospital, Taipei, Taiwan
| | - Christopher Em Griffiths
- Dermatology Centre, Salford Royal Hospital, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Nidhi Kapoor
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - Pappachan E Kolattukudy
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, USA
| | - Dominique Brees
- Translational Medicine-Preclinical Safety, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Salah-Dine Chibout
- Translational Medicine-Preclinical Safety, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Jorge Safi
- Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA
| | - Todd Fox
- Novartis Pharma AG, Basel, Switzerland
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Fonseca KL, Rodrigues PNS, Olsson IAS, Saraiva M. Experimental study of tuberculosis: From animal models to complex cell systems and organoids. PLoS Pathog 2017; 13:e1006421. [PMID: 28817682 PMCID: PMC5560521 DOI: 10.1371/journal.ppat.1006421] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tuberculosis (TB) is a devastating disease to mankind that has killed more people than any other infectious disease. Despite many efforts and successes from the scientific and health communities, the prospect of TB elimination remains distant. On the one hand, sustainable public health programs with affordable and broad implementation of anti-TB measures are needed. On the other hand, achieving TB elimination requires critical advances in three areas: vaccination, diagnosis, and treatment. It is also well accepted that succeeding in advancing these areas requires a deeper knowledge of host—pathogen interactions during infection, and for that, better experimental models are needed. Here, we review the potential and limitations of different experimental approaches used in TB research, focusing on animal and human-based cell culture models. We highlight the most recent advances in developing in vitro 3D models and introduce the potential of lung organoids as a new tool to study Mycobacterium tuberculosis infection. Tuberculosis (TB) is the number 1 killer in the world due to a bacterial infection. The study of this disease through clinical and epidemiological data and through the use of different experimental models has provided important knowledge on the role of the immune response generated during infection. This is critical for the development of novel vaccines and therapeutic strategies. However, in spite of the advances made, it is well accepted that better models are needed to study TB. This review discusses the different models used to study TB, highlighting the advantages and disadvantages of the available animal and cellular models and introducing recently developed state-of-the-art approaches based on human-based cell culture systems. These new advances are integrated in a road map for future study of TB, converging for the potential of lung organoids in TB research.
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Affiliation(s)
- Kaori L. Fonseca
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Pedro N. S. Rodrigues
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - I. Anna S. Olsson
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Margarida Saraiva
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- * E-mail:
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Bouzid F, Brégeon F, Poncin I, Weber P, Drancourt M, Canaan S. Mycobacterium canettii Infection of Adipose Tissues. Front Cell Infect Microbiol 2017; 7:189. [PMID: 28567368 PMCID: PMC5434109 DOI: 10.3389/fcimb.2017.00189] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 05/02/2017] [Indexed: 01/17/2023] Open
Abstract
Adipose tissues were shown to host Mycobacterium tuberculosis which is persisting inside mature adipocytes. It remains unknown whether this holds true for Mycobacterium canettii, a rare representative of the M. tuberculosis complex responsible for lymphatic and pulmonary tuberculosis. Here, we infected primary murine white and brown pre-adipocytes and murine 3T3-L1 pre-adipocytes and mature adipocytes with M. canettii and M. tuberculosis as a positive control. Both mycobacteria were able to infect 18–22% of challenged primary murine pre-adipocytes; and to replicate within these cells during a 7-day experiment with the intracellular inoculums being significantly higher in brown than in white pre-adipocytes for M. canettii (p = 0.02) and M. tuberculosis (p = 0.03). Further in-vitro infection of 3T3-L1 mature adipocytes yielded 9% of infected cells by M. canettii and 17% of infected cells by M. tuberculosis (p = 0.001). Interestingly, M. canettii replicated and accumulated intra-cytosolic lipid inclusions within mature adipocytes over a 12-day experiment; while M. tuberculosis stopped replicating at day 3 post-infection. These results indicate that brown pre-adipocytes could be one of the potential targets for M. tuberculosis complex mycobacteria; and illustrate differential outcome of M. tuberculosis complex mycobacteria into adipose tissues. While white adipose tissue is an unlikely sanctuary for M. canettii, it is still an open question whether M. canettii and M. tuberculosis could persist in brown adipose tissues.
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Affiliation(s)
- Fériel Bouzid
- Aix-Marseille Université, CNRS, EIPL IMM FR3479Marseille, France.,Aix Marseille Université, URMITE, UMR CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée InfectionMarseille, France
| | - Fabienne Brégeon
- Aix Marseille Université, URMITE, UMR CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée InfectionMarseille, France.,Service des Explorations Fonctionnelles Respiratoires, Centre Hospitalo-Universitaire Nord, Pôle Cardio-Vasculaire et Thoracique, Assistance Publique Hôpitaux de MarseilleMarseille, France
| | - Isabelle Poncin
- Aix-Marseille Université, CNRS, EIPL IMM FR3479Marseille, France
| | - Pascal Weber
- Aix Marseille Université, URMITE, UMR CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée InfectionMarseille, France
| | - Michel Drancourt
- Aix Marseille Université, URMITE, UMR CNRS 7278, IRD 198, INSERM 1095, IHU Méditerranée InfectionMarseille, France
| | - Stéphane Canaan
- Aix-Marseille Université, CNRS, EIPL IMM FR3479Marseille, France
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Hector J, Anderson ST, Banda G, Kamdolozi M, Jefferys LF, Shani D, Garton NJ, Mwale A, Jobe A, Davies GR, Sloan DJ. TST positivity in household contacts of tuberculosis patients: a case-contact study in Malawi. BMC Infect Dis 2017; 17:259. [PMID: 28399800 PMCID: PMC5387357 DOI: 10.1186/s12879-017-2348-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 03/28/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Screening household contacts of active tuberculosis (TB) patients is recommended for TB control. Due to resource constraints this rarely occurs in lower income countries. Demographic and clinical features of index cases may influence the likelihood of onwards TB transmission. It has also been proposed that accumulation of intracellular lipid bodies within M. tuberculosis cells may also enhance bacterial transmissibility. This study explored whether clinical and bacteriological observations recorded at baseline in TB cases in Malawi could help identify those with the highest risk of onwards transmission, to prioritise contact tracing. METHODS In this case-contact study, data on clinical presentation, sputum bacterial load and the percentage of lipid body positive acid-fast bacilli (%LB + AFB) on sputum smears were recorded in adults with sputum smear and culture positive pulmonary TB before initiation of therapy. The Tuberculin Skin Test (TST) was used to detect infection with M. tuberculosis amongst household contacts under the age of 15 years. TST positivity of the child contacts was related to characteristics of the index case. RESULTS Thirty four index cases brought 56 contacts (median: 1, range: 1-4 contacts each). 37 (66%) of contacts had a positive TST. Cavities or a high percentage of lung affected on index patient CXRs were associated with TST positivity. Multivariate analysis of non-radiological factors showed that male sex, HIV-negative status and raised peripheral blood white blood count (WBC) in index patients were also independent risk factors of TST positivity. Lower %LB + AFB counts were associated with TST positivity on univariate analysis only. CONCLUSION TST positivity is common amongst household contacts of sputum smear positive adult TB patients in Malawi. Contact tracing in this high risk population could be guided by prioritising index cases with CXR cavities and extensive radiological disease or, in the absence of CXRs, those who are HIV-negative with a raised WBC.
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Affiliation(s)
- Jonas Hector
- LSTM, Liverpool School of Tropical Medicine, Liverpool, UK.
| | - Suzanne T Anderson
- Malawi Liverpool Wellcome Trust Clinical Research Programme, College of Medicine, University of Malawi, Blantyre, Malawi.,Section of Paediatrics and Imperial College-Wellcome Trust Centre for Global Health Research, Department of Medicine, Imperial College London, London, UK
| | - Gertrude Banda
- Malawi Liverpool Wellcome Trust Clinical Research Programme, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Mercy Kamdolozi
- Department of Microbiology, College of Medicine, University of Malawi, Blantyre, Malawi
| | | | - Doris Shani
- Department of Microbiology, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Natalie J Garton
- Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, UK
| | - Agnes Mwale
- Malawi Liverpool Wellcome Trust Clinical Research Programme, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Annie Jobe
- Malawi Liverpool Wellcome Trust Clinical Research Programme, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Geraint R Davies
- Institute of Infection and Global Health, University of Liverpool, Liverpool, UK
| | - Derek J Sloan
- Malawi Liverpool Wellcome Trust Clinical Research Programme, College of Medicine, University of Malawi, Blantyre, Malawi.,School of Medicine, University of St Andrews, Scotland, UK
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Bernut A, Herrmann JL, Ordway D, Kremer L. The Diverse Cellular and Animal Models to Decipher the Physiopathological Traits of Mycobacterium abscessus Infection. Front Cell Infect Microbiol 2017; 7:100. [PMID: 28421165 PMCID: PMC5378707 DOI: 10.3389/fcimb.2017.00100] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 03/14/2017] [Indexed: 01/09/2023] Open
Abstract
Mycobacterium abscessus represents an important respiratory pathogen among the rapidly-growing non-tuberculous mycobacteria. Infections caused by M. abscessus are increasingly found in cystic fibrosis (CF) patients and are often refractory to antibiotic therapy. The underlying immunopathological mechanisms of pathogenesis remain largely unknown. A major reason for the poor advances in M. abscessus research has been a lack of adequate models to study the acute and chronic stages of the disease leading to delayed progress of evaluation of therapeutic efficacy of potentially active antibiotics. However, the recent development of cellular models led to new insights in the interplay between M. abscessus with host macrophages as well as with amoebae, proposed to represent the environmental host and reservoir for non-tuberculous mycobacteria. The zebrafish embryo has also appeared as a useful alternative to more traditional models as it recapitulates the vertebrate immune system and, due to its optical transparency, allows a spatio-temporal visualization of the infection process in a living animal. More sophisticated immunocompromised mice have also been exploited recently to dissect the immune and inflammatory responses to M. abscessus. Herein, we will discuss the limitations, advantages and potential offered by these various models to study the pathophysiology of M. abscessus infection and to assess the preclinical efficacy of compounds active against this emerging human pathogen.
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Affiliation(s)
- Audrey Bernut
- IRIM (ex-CPBS)-UMR 9004, Centre National de la Recherche Scientifique (CNRS), Infectious Disease Research Institute of Montpellier, Université de MontpellierMontpellier, France
| | - Jean-Louis Herrmann
- UMR 1173, Institut National de la Santé et de la Recherche Médicale, Université de Versailles Saint-Quentin-en-YvelinesMontigny-le-Bretonneux, France
| | - Diane Ordway
- Mycobacteria Research Laboratory, Department of Microbiology, Immunology and Pathology, Colorado State UniversityFort Collins, CO, USA
| | - Laurent Kremer
- IRIM (ex-CPBS)-UMR 9004, Centre National de la Recherche Scientifique (CNRS), Infectious Disease Research Institute of Montpellier, Université de MontpellierMontpellier, France.,Institut National de la Santé et de la Recherche Médicale, IRIMMontpellier, France
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