1
|
Manjunath P, Ahmad J, Samal J, Rani A, Sheikh JA, Zarin S, Ahuja Y, Alam A, Hasnain SE, Ehtesham NZ. Expression of a unique M. tuberculosis DNA MTase Rv1509 in M. smegmatis alters the gene expression pattern and enhances virulence. Front Microbiol 2024; 15:1344857. [PMID: 38803374 PMCID: PMC11129820 DOI: 10.3389/fmicb.2024.1344857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 04/15/2024] [Indexed: 05/29/2024] Open
Abstract
Mycobacterium tuberculosis (M. tb) genome encompasses 4,173 genes, about a quarter of which remain uncharacterized and hypothetical. Considering the current limitations associated with the diagnosis and treatment of tuberculosis, it is imperative to comprehend the pathomechanism of the disease and host-pathogen interactions to identify new drug targets for intervention strategies. Using in-silico comparative genome analysis, we identified one of the M. tb genes, Rv1509, as a signature protein exclusively present in M. tb. To explore the role of Rv1509, a likely methyl transferase, we constructed a knock-in Mycobacterium smegmatis (M. smegmatis) constitutively expressing Rv1509 (Ms_Rv1509). The Ms_Rv1509 led to differential expression of many transcriptional regulator genes as assessed by RNA-seq analysis. Further, in-vitro and in-vivo studies demonstrated an enhanced survival of Ms_Rv1509 inside the host macrophages. Ms_Rv1509 also promoted phagolysosomal escape inside macrophages to boost bacterial replication and dissemination. In-vivo infection studies revealed that Ms_Rv1509 survives better than BCG and causes pathological manifestations in the pancreas after intraperitoneal infection. Long-time survival of Ms_Rv1509 resulted in lymphocyte migration, increased T regulatory cells, giant cell formation, and likely granuloma formation in the pancreas, pointing toward the role of Rv1509 in M. tb pathogenesis.
Collapse
Affiliation(s)
- P. Manjunath
- Inflammation Biology and Cell Signaling Laboratory, National Institute of Pathology, New Delhi, India
- Department of Biotechnology, Jamia Hamdard, New Delhi, India
| | - Javeed Ahmad
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Jasmine Samal
- Inflammation Biology and Cell Signaling Laboratory, National Institute of Pathology, New Delhi, India
| | - Anshu Rani
- Kusuma School of Biological Sciences, Indian Institute of Technology, New Delhi, India
| | | | - Sheeba Zarin
- Department of Biotechnology, Jamia Hamdard, New Delhi, India
- Department of Life Science, Sharda School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Yashika Ahuja
- Department of Life Science, Sharda School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Anwar Alam
- Department of Biotechnology, Sharda School of Engineering Sciences and Technology, Sharda University, Greater Noida, Uttar Pradesh, India
| | - Seyed E. Hasnain
- Department of Life Science, Sharda School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology, New Delhi, India
| | - Nasreen Z. Ehtesham
- Department of Life Science, Sharda School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, India
| |
Collapse
|
2
|
Azargoonjahromi A. Dual role of nitric oxide in Alzheimer's Disease. Nitric Oxide 2023; 134-135:23-37. [PMID: 37019299 DOI: 10.1016/j.niox.2023.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/02/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023]
Abstract
Nitric oxide (NO), an enzymatic product of nitric oxide synthase (NOS), has been associated with a variety of neurological diseases such as Alzheimer's disease (AD). NO has long been thought to contribute to neurotoxic insults caused by neuroinflammation in AD. This perception shifts as more attention is paid to the early stages before cognitive problems manifest. However, it has revealed a compensatory neuroprotective role for NO that protects synapses by increasing neuronal excitability. NO can positively affect neurons by inducing neuroplasticity, neuroprotection, and myelination, as well as having cytolytic activity to reduce inflammation. NO can also induce long-term potentiation (LTP), a process by which synaptic connections among neurons become more potent. Not to mention that such functions give rise to AD protection. Notably, it is unquestionably necessary to conduct more research to clarify NO pathways in neurodegenerative dementias because doing so could help us better understand their pathophysiology and develop more effective treatment options. All these findings bring us to the prevailing notion that NO can be used either as a therapeutic agent in patients afflicted with AD and other memory impairment disorders or as a contributor to the neurotoxic and aggressive factor in AD. In this review, after presenting a general background on AD and NO, various factors that have a pivotal role in both protecting and exacerbating AD and their correlation with NO will be elucidated. Following this, both the neuroprotective and neurotoxic effects of NO on neurons and glial cells among AD cases will be discussed in detail.
Collapse
|
3
|
A highly sensitive and specific luminescent MOF determines nitric oxide production and quantifies hydrogen sulfide-mediated inhibition of nitric oxide in living cells. Mikrochim Acta 2023; 190:127. [PMID: 36897440 DOI: 10.1007/s00604-023-05660-y] [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: 06/24/2022] [Accepted: 12/25/2022] [Indexed: 03/11/2023]
Abstract
The synthesis of a novel carboxylate-type organic linker-based luminescent MOF (Zn(H2L) (L1)) (named PUC2) (H2L = 2-aminoterephtalic acid, L1 = 1-(3-aminopropyl) imidazole) is reported by the solvothermal method and comprehensively characterized using single-crystal XRD, PXRD, FTIR, TGA, XPS, FESEM, HRTEM, and BET. PUC2 selectively reacts with nitric oxide (▪NO) with a detection limit of 0.08 µM, and a quenching constant (0.5 × 104 M-1) indicating a strong interaction with ▪NO. PUC2 sensitivity remains unaffected by cellular proteins or biologically relevant metals (Cu2+/ Fe3+/Mg2+/ Na+/K+/Zn2+), RNS/ROS, or H2S to score ▪NO in living cells. Lastly, we used PUC2 to demonstrate that H2S inhibition increases ▪NO production by ~ 14-30% in various living cells while exogenous H2S suppresses ▪NO production, indicating that the modulation of cellular ▪NO production by H2S is rather generic and not restricted to a particular cell type. In conclusion, PUC2 can successfully detect ▪NO production in living cells and environmental samples with considerable potential for its application in improving the understanding of the role of ▪NO in biological samples and study the inter-relationship between ▪NO and H2S.
Collapse
|
4
|
Imaging characteristics of pulmonary BCG/TB infection in patients with chronic granulomatous disease. Sci Rep 2022; 12:11765. [PMID: 35817807 PMCID: PMC9273607 DOI: 10.1038/s41598-022-16021-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
In China, tuberculosis (TB) is endemic and the Bacillus Callmette–Güerin (BCG) vaccine is administered to all the newborns, which may lead to BCG infection in patients with chronic granulomatous disease (CGD). Infection of BCG/TB in CGD patients can be fatal and pulmonary is the most affected organ. Our objective was to assess the imaging of pulmonary BCG/TB infection in CGD. We screened 169 CGD patients and identified the patients with pulmonary BCG/TB infection. BCG infection was diagnosis according to the vaccination history, local infection manifestation, acid-fast bacilli staining, specific polymerase chain reaction, and/or spoligotyping. PPD, T-SPOT and acid-fast bacilli staining were used for diagnosis of TB. Totally 58 patients were identified, including TB (n = 7), solely BCG (n = 18), BCG + bacterial (n = 20), and BCG + fungi (n = 13). The onset of BCG disease was much earlier than TB. For those patients only with BCG, lymphadenopathy was the first and most prevalent feature. The most found location was the left axilla, followed by the ipsilateral cervical areas and mediastinal or hilar area. On chest CT, ground-glass opacities, multiple nodules and pulmonary scarring were the most common findings. For TB patients, the pulmonary infections were more serious, including large masses, severe lymphadenopathy, and extensive pulmonary fibrosis. Pulmonary infection of BCG were more common than TB in CGD patients, but much less severe.
Collapse
|
5
|
Birhanu AG, Gómez-Muñoz M, Kalayou S, Riaz T, Lutter T, Yimer SA, Abebe M, Tønjum T. Proteome Profiling of Mycobacterium tuberculosis Cells Exposed to Nitrosative Stress. ACS OMEGA 2022; 7:3470-3482. [PMID: 35128256 PMCID: PMC8811941 DOI: 10.1021/acsomega.1c05923] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Reactive nitrogen species (RNS) are secreted by human cells in response to infection by Mycobacterium tuberculosis (Mtb). Although RNS can kill Mtb under some circumstances, Mtb can adapt and survive in the presence of RNS by a process that involves modulation of gene expression. Previous studies focused primarily on stress-related changes in the Mtb transcriptome. This study unveils changes in the Mtb proteome in response to a sub-lethal dose of nitric oxide (NO) over several hours of exposure. Proteins were identified using liquid chromatography coupled with electrospray ionization mass spectrometry (LC-MS/MS). A total of 2911 Mtb proteins were identified, of which 581 were differentially abundant (DA) after exposure to NO in at least one of the four time points (30 min, 2 h, 6 h, and 20 h). The proteomic response to NO was marked by two phases, with few DA proteins in the early phase and a multitude of DA proteins in the later phase. The efflux pump Rv1687 stood out as being the only protein more abundant at all the time points and might play a role in the early protection of Mtb against nitrosative stress. These changes appeared to be compensatory in nature, contributing to iron homeostasis, energy metabolism, and other stress responses. This study thereby provides new insights into the response of Mtb to NO at the level of proteomics.
Collapse
Affiliation(s)
- Alemayehu Godana Birhanu
- Department
of Microbiology, University of Oslo, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
- Institute
of Biotechnology, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
| | - Marta Gómez-Muñoz
- Department
of Microbiology, University of Oslo, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
| | - Shewit Kalayou
- Department
of Microbiology, Oslo University Hospital, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
- International
Center of Insect Physiology and Ecology (ICIPE), P.O. Box 30772-00100 Nairobi, Kenya
| | - Tahira Riaz
- Department
of Microbiology, University of Oslo, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
| | - Timo Lutter
- Department
of Microbiology, University of Oslo, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
| | - Solomon Abebe Yimer
- Department
of Microbiology, University of Oslo, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
- Coalition
for Epidemic Preparedness Innovations (CEPI), P.O. Box 123, Torshov, 0412 Oslo, Norway
| | - Markos Abebe
- Armauer
Hansen Research Institute, Jimma Road, P.O. Box 1005 Addis Ababa, Ethiopia
| | - Tone Tønjum
- Department
of Microbiology, University of Oslo, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
- Department
of Microbiology, Oslo University Hospital, P.O. Box 4950, Nydalen, NO-0424 Oslo, Norway
| |
Collapse
|
6
|
Carranza C, Herrera MT, Guzmán-Beltrán S, Salgado-Cantú MG, Salido-Guadarrama I, Santiago E, Chávez-Galán L, Gutiérrez-González LH, González Y. A Dual Marker for Monitoring MDR-TB Treatment: Host-Derived miRNAs and M. tuberculosis-Derived RNA Sequences in Serum. Front Immunol 2021; 12:760468. [PMID: 34804048 PMCID: PMC8600136 DOI: 10.3389/fimmu.2021.760468] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/18/2021] [Indexed: 12/18/2022] Open
Abstract
Background In the absence of a late marker of treatment failure or relapse in MDR-TB patients, biomarkers based on host-miRNAs coupled with M. tuberculosis-RNAs evaluated in extracellular vesicles (EVs) are an alternative follow-up for MDR-TB disease. Characterization of EVs cargo to identify differentially expressed miRNAs before and after treatment, and to identify M. tuberculosis-derived RNA in serum EVs from resistant TB patients. Methods EVs were isolated from serum of 26 drug-resistant TB (DR-TB) patients and 16 healthy subjects. Differential expression of miRNAs in pooled exosomes from both untreated and treated patients was assessed and individually validated at different time points during treatment. In addition, M. tuberculosis RNA was amplified in the same samples by qPCR. Results A multivariate analysis using miR-let-7e-5p, -197-3p and -223-3p were found to be a more sensitive discriminator between healthy individuals and those with TB for both DR-TB (AUC= 0.96, 95%, CI=0.907-1) and MDR-TB groups (AUC= 0.95, 95%, CI= 0.89-1). Upregulation of miR-let-7e-5p were observed at the time of M. tuberculosis negative culture T(3-5) for MDR-TB group or for long-term T(9-15) for MDR-TB group without diabetes (T2DM). A second pathogen-based marker based on 30kDa and 5KST sequences was detected in 33% of the MDR-TB patients after the intensive phase of treatment. The miR-let7e-5p is a candidate biomarker for long-term monitoring of treatment for the group of MDR-TB without T2DM. A dual marker of host-derived miR-let7e-5p and M. tuberculosis-derived RNA for monitoring-TB treatment based in serum EVs. Conclusion A dual marker consisting of host-derived miR-let7e-5p and M. tuberculosis-derived RNA, could be an indicator of treatment failure or relapse time after treatment was completed.
Collapse
Affiliation(s)
- Claudia Carranza
- Laboratorio de Inmunobiología de la Tuberculosis, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico, Mexico
| | - María Teresa Herrera
- Department of Microbiology, National Institute for Respiratory Diseases Ismael Cosío Villegas, Mexico, Mexico
| | - Silvia Guzmán-Beltrán
- Department of Microbiology, National Institute for Respiratory Diseases Ismael Cosío Villegas, Mexico, Mexico
| | | | - Ivan Salido-Guadarrama
- Department of Microbiology, National Institute for Respiratory Diseases Ismael Cosío Villegas, Mexico, Mexico
| | - Elizabeth Santiago
- Laboratorio de Biología Computacional, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico, Mexico
| | - Leslie Chávez-Galán
- Laboratory of Integrative Immunology, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico, Mexico
| | | | - Yolanda González
- Department of Microbiology, National Institute for Respiratory Diseases Ismael Cosío Villegas, Mexico, Mexico
| |
Collapse
|
7
|
Ortiz-Robles CD, Cortés-Montoya V, Reyes-Aguilar SS, Albores A, Calderón-Aranda ES. Low concentrations of lead disturb phenotypical markers of the inflammatory and the anti-inflammatory profile of bone marrow-derived macrophages from BALB/c mice. Toxicology 2021; 460:152885. [PMID: 34352350 DOI: 10.1016/j.tox.2021.152885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/21/2021] [Accepted: 07/31/2021] [Indexed: 11/28/2022]
Abstract
Lead (Pb) is a ubiquitous toxic metal that decreases resistance to infections, in which the macrophages have an essential role. Pb adverse effects on nitric oxide (NO-) production and variable effects on inflammatory cytokines in activated macrophages have been reported, but no effects have been reported in anti-inflammatory macrophages. We studied Pb (0.03-6 μg/dL equivalent to 0.014-2.89 μM) effects on the function of bone marrow-derived macrophages (BMDM) induced to either inflammatory or anti-inflammatory phenotypes, with LPS + IFNγ or IL-4+IL-13, respectively, and whether these effects are related. Pb did not induce cytotoxicity at any concentration in both macrophage phenotypes. In inflammatory BMDM, Pb (6 μg/dL) inhibited NO- production without affecting inducible nitric oxide synthase (iNOS) levels or basal arginase activity. At 3 and 6 μg/dL, Pb enhanced the major histocompatibility complex class II (MHC II) membrane expression but did not modify CD86 expression, TNFα, or IL-1β production and secretion. In anti-inflammatory BMDM, Pb did not alter arginase activity, but at 3 and 6 μg/dL, increased TGF-β1 and mannose receptor expression. Results showed that environmentally relevant concentrations of Pb alter functional outcomes or phenotypic markers of anti-inflammatory for the first time. The Pb effects on the inflammatory macrophages are not dependent on negative feedback resulting from the Pb effect on the anti-inflammatory phenotype. The Pb affected only some molecules or specific pathways related to both phenotypes. These effects could be related to Pb effects on immune defense against intracellular pathogens and allergy susceptibility.
Collapse
Affiliation(s)
- Christian D Ortiz-Robles
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados, Cinvestav del IPN, Ciudad de México, Mexico
| | - Vanessa Cortés-Montoya
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados, Cinvestav del IPN, Ciudad de México, Mexico
| | - Sandra S Reyes-Aguilar
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados, Cinvestav del IPN, Ciudad de México, Mexico
| | - Arnulfo Albores
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados, Cinvestav del IPN, Ciudad de México, Mexico
| | - Emma S Calderón-Aranda
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados, Cinvestav del IPN, Ciudad de México, Mexico.
| |
Collapse
|
8
|
Porrini C, Ramarao N, Tran SL. Dr. NO and Mr. Toxic - the versatile role of nitric oxide. Biol Chem 2021; 401:547-572. [PMID: 31811798 DOI: 10.1515/hsz-2019-0368] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 12/04/2019] [Indexed: 12/25/2022]
Abstract
Nitric oxide (NO) is present in various organisms from humans, to plants, fungus and bacteria. NO is a fundamental signaling molecule implicated in major cellular functions. The role of NO ranges from an essential molecule to a potent mediator of cellular damages. The ability of NO to react with a broad range of biomolecules allows on one hand its regulation and a gradient concentration and on the other hand to exert physiological as well as pathological functions. In humans, NO is implicated in cardiovascular homeostasis, neurotransmission and immunity. However, NO can also contribute to cardiovascular diseases (CVDs) or septic shock. For certain denitrifying bacteria, NO is part of their metabolism as a required intermediate of the nitrogen cycle. However, for other bacteria, NO is toxic and harmful. To survive, those bacteria have developed processes to resist this toxic effect and persist inside their host. NO also contributes to maintain the host/microbiota homeostasis. But little is known about the impact of NO produced during prolonged inflammation on microbiota integrity, and some pathogenic bacteria take advantage of the NO response to colonize the gut over the microbiota. Taken together, depending on the environmental context (prolonged production, gradient concentration, presence of partners for interaction, presence of oxygen, etc.), NO will exert its beneficial or detrimental function. In this review, we highlight the dual role of NO for humans, pathogenic bacteria and microbiota, and the mechanisms used by each organism to produce, use or resist NO.
Collapse
Affiliation(s)
- Constance Porrini
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Nalini Ramarao
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Seav-Ly Tran
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| |
Collapse
|
9
|
Kilinç G, Saris A, Ottenhoff THM, Haks MC. Host-directed therapy to combat mycobacterial infections. Immunol Rev 2021; 301:62-83. [PMID: 33565103 PMCID: PMC8248113 DOI: 10.1111/imr.12951] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 12/27/2020] [Indexed: 12/27/2022]
Abstract
Upon infection, mycobacteria, such as Mycobacterium tuberculosis (Mtb) and nontuberculous mycobacteria (NTM), are recognized by host innate immune cells, triggering a series of intracellular processes that promote mycobacterial killing. Mycobacteria, however, have developed multiple counter‐strategies to persist and survive inside host cells. By manipulating host effector mechanisms, including phagosome maturation, vacuolar escape, autophagy, antigen presentation, and metabolic pathways, pathogenic mycobacteria are able to establish long‐lasting infection. Counteracting these mycobacteria‐induced host modifying mechanisms can be accomplished by host‐directed therapeutic (HDT) strategies. HDTs offer several major advantages compared to conventional antibiotics: (a) HDTs can be effective against both drug‐resistant and drug‐susceptible bacteria, as well as potentially dormant mycobacteria; (b) HDTs are less likely to induce bacterial drug resistance; and (c) HDTs could synergize with, or shorten antibiotic treatment by targeting different pathways. In this review, we will explore host‐pathogen interactions that have been identified for Mtb for which potential HDTs impacting both innate and adaptive immunity are available, and outline those worthy of future research. We will also discuss possibilities to target NTM infection by HDT, although current knowledge regarding host‐pathogen interactions for NTM is limited compared to Mtb. Finally, we speculate that combinatorial HDT strategies can potentially synergize to achieve optimal mycobacterial host immune control.
Collapse
Affiliation(s)
- Gül Kilinç
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Anno Saris
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Tom H M Ottenhoff
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Mariëlle C Haks
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
10
|
Effects of Salmonella enterica serovar typhimurium sseK1 on macrophage inflammation-related cytokines and glycolysis. Cytokine 2021; 140:155424. [PMID: 33513526 DOI: 10.1016/j.cyto.2021.155424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 12/12/2020] [Accepted: 01/02/2021] [Indexed: 12/27/2022]
Abstract
Salmonella enterica serovar Typhimurium (S. Typhimurium), an important virulent intracellular pathogen, causes inflammatory gastroenteritis or typhoid. Macrophages play a key role in innate immunity against Salmonella. Salmonella secreted effector K1 (SseK1) encoded by SPI2 has been identified a novel translocated protein. To investigate the role of Salmonella enterica serovar Typhimurium sseK1 about the inflammation and glycolysis in macrophages, the levels of IL-1β, IL-2, IL-4, IL-6, IFN-γ and Nitric Oxide in macrophages infected by S. Typhimurium SL1344 wild-type (WT) group, ΔsseK1 mutant group and sseK1-complemented group were measured. And the glycolysis level was determined in RAW 264.7 cells infected with these different Salmonella strains. The results showed that groups infected by wild-type strain, sseK1 mutant and sseK1-complemented strain upregulated the production of IL-1β, IL-2, IL-4, IL-6, IFN-γ and NO at 3 h, 6 h and 12 h, respectively. The production of IL-1β, IL-2, IL-4, IL-6, IFN-γ and NO in wild-type strain group were significantly decreased compared with the ΔsseK1 mutant group, which suggested that sseK1 down-regulated the production of related inflammatory factors. Moreover, hexokinase, lactic acid and pyruvic acid levels significantly decreased by infection with sseK1 mutant compared to the wild-type strain. The ATP level of ΔsseK1 mutant group was remarkably increased than WT group and sseK1-complemented group. These indicated that the sseK1 enhanced the level of glycolysis of macrophages infected by S. Typhimurium. In summary, the results demonstrated that sseK1 can down-regulate the inflammation-related cytokines and enhance the glycolysis level in macrophages infected by S. Typhimurium, which may be beneficial for S. typhimurium survival in macrophages.
Collapse
|
11
|
Lee HJ, Hong WG, Woo Y, Ahn JH, Ko HJ, Kim H, Moon S, Hahn TW, Jung YM, Song DK, Jung YJ. Lysophosphatidylcholine Enhances Bactericidal Activity by Promoting Phagosome Maturation via the Activation of the NF-κB Pathway during Salmonella Infection in Mouse Macrophages. Mol Cells 2020; 43:989-1001. [PMID: 33250450 PMCID: PMC7772511 DOI: 10.14348/molcells.2020.0030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 12/13/2022] Open
Abstract
Salmonella enterica serovar Typhimurium (S. Typhimurium) is a facultative intracellular pathogen that causes salmonellosis and mortality worldwide. S. Typhimurium infects macrophages and survives within phagosomes by avoiding the phagosome-lysosome fusion system. Phagosomes sequentially acquire different Rab GTPases during maturation and eventually fuse with acidic lysosomes. Lysophosphatidylcholine (LPC) is a bioactive lipid that is associated with the generation of chemoattractants and reactive oxygen species (ROS). In our previous study, LPC controlled the intracellular growth of Mycobacterium tuberculosis by promoting phagosome maturation. In this study, to verify whether LPC enhances phagosome maturation and regulates the intracellular growth of S. Typhimurium, macrophages were infected with S. Typhimurium. LPC decreased the intracellular bacterial burden, but it did not induce cytotoxicity in S. Typhimuriuminfected cells. In addition, combined administration of LPC and antibiotic significantly reduced the bacterial burden in the spleen and the liver. The ratios of the colocalization of intracellular S. Typhimurium with phagosome maturation markers, such as early endosome antigen 1 (EEA1) and lysosome-associated membrane protein 1 (LAMP-1), were significantly increased in LPC-treated cells. The expression level of cleaved cathepsin D was rapidly increased in LPCtreated cells during S. Typhimurium infection. Treatment with LPC enhanced ROS production, but it did not affect nitric oxide production in S. Typhimurium-infected cells. LPC also rapidly triggered the phosphorylation of IκBα during S. Typhimurium infection. These results suggest that LPC can improve phagosome maturation via ROS-induced activation of NF-κB pathway and thus may be developed as a therapeutic agent to control S. Typhimurium growth.
Collapse
Affiliation(s)
- Hyo-Ji Lee
- Department of Biological Sciences and Institute of Life Sciences, Kangwon National University, Chuncheon 2434, Korea
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea
| | - Wan-Gi Hong
- BIT Medical Convergence Graduate Program, Kangwon National University, Chuncheon 4341, Korea
| | - Yunseo Woo
- Department of Biological Sciences and Institute of Life Sciences, Kangwon National University, Chuncheon 2434, Korea
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea
| | - Jae-Hee Ahn
- Department of Pharmacy, Kangwon National University, Chuncheon 2441, Korea
| | - Hyun-Jeong Ko
- Department of Pharmacy, Kangwon National University, Chuncheon 2441, Korea
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea
| | - Hyeran Kim
- Department of Biological Sciences and Institute of Life Sciences, Kangwon National University, Chuncheon 2434, Korea
| | - Sungjin Moon
- Department of Biological Sciences and Institute of Life Sciences, Kangwon National University, Chuncheon 2434, Korea
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea
| | - Tae-Wook Hahn
- Department of Veterinary Medicine, Kangwon National University, Chuncheon 231, Korea
| | - Young Mee Jung
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Korea
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea
| | - Dong-Keun Song
- Department of Pharmacology, College of Medicine, Hallym University, Chuncheon 24252, Korea
| | - Yu-Jin Jung
- Department of Biological Sciences and Institute of Life Sciences, Kangwon National University, Chuncheon 2434, Korea
- BIT Medical Convergence Graduate Program, Kangwon National University, Chuncheon 4341, Korea
- Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea
| |
Collapse
|
12
|
Szulc-Kielbik I, Brzostek A, Gatkowska J, Kielbik M, Klink M. Determination of in vitro and in vivo immune response to recombinant cholesterol oxidase from Mycobacterium tuberculosis. Immunol Lett 2020; 228:103-111. [PMID: 33166528 DOI: 10.1016/j.imlet.2020.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/02/2020] [Accepted: 11/04/2020] [Indexed: 01/10/2023]
Abstract
Cholesterol oxidase (ChoD) is an enzyme that is involved but is dispensable in the process of cholesterol degradation by Mycobacterium tuberculosis (Mtb). Interestingly, ChoD is a virulence factor of Mtb, and it strongly modulates the function of human macrophages in vitro, allowing the intracellular survival of bacteria. Here, we determined the immunogenic activity of recombinant ChoD from Mtb in a mouse model. We found that peritoneal exudate cells obtained from mice injected i.p. with ChoD but not those from mice injected with PBS responded in vitro with highly spontaneous, as well as phorbol 12-myristate 13-acetate (PMA)-stimulated, production of reactive oxygen species (ROS). However, ChoD significantly reduced the ROS response to PMA in re-stimulated cells in vitro. The cytokine secretion pattern in mice immunized s.c. with ChoD emulsified with incomplete Freund's adjuvant (IFA) showed evidence of Th2-induced or proinflammatory immune responses. The main cytokines detected in sera were interleukin (IL) 6 and 5, tumour necrosis factor α (TNF-α) and monocyte chemoattractant protein 1, while IL-2 and IL-12 as well as interferon γ were undetectable. Similarly, ChoD protein alone activated THP-1-derived macrophages to release proinflammatory IL-6, IL-8 and TNF-α, in vitro. Moreover, a statistically significant predominance of the IgG1 isotype over that of IgG2a in the sera of mice immunized with ChoD/IFA was observed. In conclusion, we demonstrated here that ChoD of Mtb is an active protein, which is able to induce the immune response both in vivo and in vitro.
Collapse
Affiliation(s)
| | - Anna Brzostek
- Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Justyna Gatkowska
- Department of Molecular Microbiology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Michal Kielbik
- Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Magdalena Klink
- Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland.
| |
Collapse
|
13
|
Chalmers JD, Balavoine C, Castellotti PF, Hügel C, Payet A, Wat D, Rohde G. European Respiratory Society International Congress, Madrid, 2019: nontuberculous mycobacterial pulmonary disease highlights. ERJ Open Res 2020; 6:00317-2020. [PMID: 33123559 PMCID: PMC7569164 DOI: 10.1183/23120541.00317-2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/03/2020] [Indexed: 11/05/2022] Open
Abstract
Once overlooked, awareness of nontuberculous mycobacterial pulmonary disease (NTM-PD) is rapidly rising, in line with increasing prevalence worldwide. The European Respiratory Society (ERS) International Congress 2019, held in Madrid, Spain, provided a platform for invigorating discussions and exciting new research in the field. This article explores approaches being taken to combat NTM-PD with a focus not only on novel prevalence and risk factor data, but also on emerging antimicrobials and their routes of delivery, and other potential treatment options in early clinical development.
Collapse
Affiliation(s)
| | | | | | | | - Annabelle Payet
- Pneumologie, Centre Hospitalier Universitaire de la Réunion, Saint Pierre, Réunion
| | - Dennis Wat
- Liverpool Heart and Chest Hospital, Liverpool, UK
| | - Gernot Rohde
- University Hospital Frankfurt, Frankfurt, Germany
| |
Collapse
|
14
|
Jain N, Kalam H, Singh L, Sharma V, Kedia S, Das P, Ahuja V, Kumar D. Mesenchymal stem cells offer a drug-tolerant and immune-privileged niche to Mycobacterium tuberculosis. Nat Commun 2020; 11:3062. [PMID: 32546788 PMCID: PMC7297998 DOI: 10.1038/s41467-020-16877-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 05/29/2020] [Indexed: 02/06/2023] Open
Abstract
Anti-tuberculosis (TB) drugs, while being highly potent in vitro, require prolonged treatment to control Mycobacterium tuberculosis (Mtb) infections in vivo. We report here that mesenchymal stem cells (MSCs) shelter Mtb to help tolerate anti-TB drugs. MSCs readily take up Mtb and allow unabated mycobacterial growth despite having a functional innate pathway of phagosome maturation. Unlike macrophage-resident ones, MSC-resident Mtb tolerates anti-TB drugs remarkably well, a phenomenon requiring proteins ABCC1, ABCG2 and vacuolar-type H+ATPases. Additionally, the classic pro-inflammatory cytokines IFNγ and TNFα aid mycobacterial growth within MSCs. Mechanistically, evading drugs and inflammatory cytokines by MSC-resident Mtb is dependent on elevated PGE2 signaling, which we verify in vivo analyzing sorted CD45-Sca1+CD73+-MSCs from lungs of infected mice. Moreover, MSCs are observed in and around human tuberculosis granulomas, harboring Mtb bacilli. We therefore propose, targeting the unique immune-privileged niche, provided by MSCs to Mtb, can have a major impact on tuberculosis prevention and cure.
Collapse
Affiliation(s)
- Neharika Jain
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Haroon Kalam
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Lakshyaveer Singh
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Vartika Sharma
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Saurabh Kedia
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, 110012, India
| | - Prasenjit Das
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, 110012, India
| | - Vineet Ahuja
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, 110012, India
| | - Dhiraj Kumar
- Cellular Immunology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| |
Collapse
|
15
|
Liu H, Xiong X, Zhu T, Zhu Y, Peng Y, Zhu X, Wang J, Chen H, Chen Y, Guo A. Differential nitric oxide induced by Mycobacterium bovis and BCG leading to dendritic cells apoptosis in a caspase dependent manner. Microb Pathog 2020; 149:104303. [PMID: 32504845 DOI: 10.1016/j.micpath.2020.104303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 03/14/2020] [Accepted: 05/29/2020] [Indexed: 12/25/2022]
Abstract
Dendritic cells (DCs) are critical for both innate and adaptive immunity. Meanwhile, nitric oxide (NO) is a member of reactive nitrogen species (RNS) generally considered to play a key role in the bactericidal process in innate immunity against Mycobacterium tuberculosis complex infection. The present study therefore investigated the mechanism of NO production in murine DCs induced by Mycobacterium bovis (M.bovis) and its attenuated strain Bacillus Calmette-Guérin (BCG) infection. The expression of genes Slc7A1, Slc7A2, iNOS, and ArgI essential to NO synthesis was up-regulated in M.bovis/BCG infected DCs. IFN-γ addition further increased, while the iNOS inhibitor L-NMMA significantly inhibited their expression. Accordingly, the end products of arginine metabolism, NO and urea, were found to be significantly increased. In addition, BCG induced significantly higher levels of apoptosis in DCs compared to M.bovis shown by higher levels of DNA fragmentation using flow cytometry and release of mitochondrial Cytochrome C, and up-regulation of the genes caspase-3, caspase-8, caspase-9 and dffa critical to apoptosis by qRT-PCR detection and western blot analysis. Furthermore, IFN-γ increased, but L-NMMA decreased apoptosis of M.bovis/BCG infected DCs. In addition, mycobacterial intracellular survival was significantly reduced by IFN-γ treatment in BCG infected DCs, while slightly increased by L-NMMA treatment. Taken altogether, our data show that NO synthesis was differentially increased and associated with apoptosis in M.bovis/BCG infected DCs. These findings may significantly contribute to elucidate the pathogenesis of M.bovis.
Collapse
Affiliation(s)
- Han Liu
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Xuekai Xiong
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Tingting Zhu
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Yifan Zhu
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Yongchong Peng
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Xiaojie Zhu
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Jieru Wang
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Huanchun Chen
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Yingyu Chen
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
| | - Aizhen Guo
- The National Key Laboratory of Agricultural Microbiology, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China; Hubei International Scientific and Technological Cooperation Base of Veterinary Epidemiology, Huazhong Agricultural University, Wuhan, 430070, China; Key Laboratory of Development of Veterinary Diagnostic Products, Key Laboratory of Ruminant Bio-products, Huazhong Agricultural University, Wuhan, 430070, China; Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, 430070, China.
| |
Collapse
|
16
|
Rv2037c, a stress induced conserved hypothetical protein of Mycobacterium tuberculosis, is a phospholipase: Role in cell wall modulation and intracellular survival. Int J Biol Macromol 2020; 153:817-835. [DOI: 10.1016/j.ijbiomac.2020.03.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 02/08/2023]
|
17
|
Oxidative Phosphorylation—an Update on a New, Essential Target Space for Drug Discovery in Mycobacterium tuberculosis. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10072339] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
New drugs with new mechanisms of action are urgently required to tackle the global tuberculosis epidemic. Following the FDA-approval of the ATP synthase inhibitor bedaquiline (Sirturo®), energy metabolism has become the subject of intense focus as a novel pathway to exploit for tuberculosis drug development. This enthusiasm stems from the fact that oxidative phosphorylation (OxPhos) and the maintenance of the transmembrane electrochemical gradient are essential for the viability of replicating and non-replicating Mycobacterium tuberculosis (M. tb), the etiological agent of human tuberculosis (TB). Therefore, new drugs targeting this pathway have the potential to shorten TB treatment, which is one of the major goals of TB drug discovery. This review summarises the latest and key findings regarding the OxPhos pathway in M. tb and provides an overview of the inhibitors targeting various components. We also discuss the potential of new regimens containing these inhibitors, the flexibility of this pathway and, consequently, the complexity in targeting it. Lastly, we discuss opportunities and future directions of this drug target space.
Collapse
|
18
|
Host and Mycobacterium tuberculosis interaction; expression of iNOS and Tbet genes from the host and virulence factors of the bacteria. GENE REPORTS 2019. [DOI: 10.1016/j.genrep.2019.100503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
19
|
Hodgkinson JW, Belosevic M, Elks PM, Barreda DR. Teleost contributions to the understanding of mycobacterial diseases. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 96:111-125. [PMID: 30776420 DOI: 10.1016/j.dci.2019.02.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
Few pathogens have shaped human medicine as the mycobacteria. From understanding biological phenomena driving disease spread, to mechanisms of host-pathogen interactions and antibiotic resistance, the Mycobacterium genus continues to challenge and offer insights into the basis of health and disease. Teleost fish models of mycobacterial infections have progressed significantly over the past three decades, now supplying a range of unique tools and new opportunities to define the strategies employed by these Gram-positive bacteria to overcome host defenses, as well as those host antimicrobial pathways that can be used to limit its growth and spread. Herein, we take a comparative perspective and provide an update on the contributions of teleost models to our understanding of mycobacterial diseases.
Collapse
Affiliation(s)
- Jordan W Hodgkinson
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Miodrag Belosevic
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Philip M Elks
- The Bateson Centre, University of Sheffield, Western Bank, Sheffield, United Kingdom; Department of Infection and Immunity and Cardiovascular Disease, University of Sheffield, Western Bank, Sheffield, United Kingdom
| | - Daniel R Barreda
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada; Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada.
| |
Collapse
|
20
|
Paroha R, Chaurasiya SK, Chourasia R. Phospholipase C‐γ2 promotes intracellular survival of mycobacteria. J Cell Biochem 2018; 120:5062-5071. [DOI: 10.1002/jcb.27783] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 09/06/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Ruchi Paroha
- Host‐Pathogen Interaction and Signal Transduction Laboratory, Department of Microbiology, School of Biological Sciences, Dr. Hari Singh Gour University Sagar India
| | - Shivendra K. Chaurasiya
- Host‐Pathogen Interaction and Signal Transduction Laboratory, Department of Microbiology, School of Biological Sciences, Dr. Hari Singh Gour University Sagar India
| | - Rashmi Chourasia
- Department of Chemistry, School of Chemical Sciences, Dr. Hari Singh Gour University Sagar India
| |
Collapse
|
21
|
López-Hernández Y, Rivas-Santiago CE, López JA, Mendoza-Almanza G, Hernandez-Pando R. Tuberculosis and cigarette smoke exposure: An update of in vitro and in vivo studies. Exp Lung Res 2018; 44:113-126. [PMID: 29565741 DOI: 10.1080/01902148.2018.1444824] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tuberculosis (TB) has been declared the first cause of death by an infectious agent. Annually, 10.4 million people suffer active TB. Most infected individuals live in low-income countries, where social and economic conditions enhance the dissemination and progression of the disease. These countries have a high percentage of smokers. Thousands of studies have linked cigarette smoke (CS) with increased risk of many diseases, such as cancer and lung diseases. Numerous in vitro studies have been conducted to evaluate the general and specific toxic effects of CS in lung immune function. Smoke exposure increases the risk of TB development three-fold. However, until now, only few animal studies have been performed to analyze the association between smoke and TB. In the present work, we review in vitro and in vivo studies whose aim was to analyze the molecular basis of TB susceptibility caused by exposure to CS.
Collapse
Affiliation(s)
- Y López-Hernández
- a CONACyT, Unidad Academica de Ciencias Biologicas , Universidad Autónoma de Zacatecas , Zacatecas , Mexico
| | - C E Rivas-Santiago
- a CONACyT, Unidad Academica de Ciencias Biologicas , Universidad Autónoma de Zacatecas , Zacatecas , Mexico
| | - J A López
- b Laboratorio de MicroRNAs, Unidad Academica de Ciencias Biologicas , Universidad Autónoma de Zacatecas , Zacatecas , Mexico
| | - G Mendoza-Almanza
- a CONACyT, Unidad Academica de Ciencias Biologicas , Universidad Autónoma de Zacatecas , Zacatecas , Mexico
| | - R Hernandez-Pando
- c Departamento de Patologia, Unidad de Patologia Experimental , Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran , Mexico
| |
Collapse
|
22
|
Hwanga EH, Kim TH, Park JY, Hong JJ, Kim DH, Ha SJ, Yang SJ, Shin SJ, Park JH. TLR2 contributes to trigger immune response of pleural mesothelial cells against Mycobacterium bovis BCG and M. tuberculosis infection. Cytokine 2018; 95:80-87. [PMID: 28249177 DOI: 10.1016/j.cyto.2017.02.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/18/2017] [Accepted: 02/20/2017] [Indexed: 12/17/2022]
Abstract
Mycobacterium tuberculosis is a causative agent leading to pleural effusion, characterized by the accumulation of fluid and immune cells in the pleural cavity. Although this phenomenon has been described before, detailed processes or mechanisms associated with the pleural effusion are still not well understood. Pleural mesothelial cells (PMCs) are specialized epithelial cells that cover the body wall and internal organs in pleural cavity playing a central role in pleural inflammation. Toll-like receptors are expressed in various cell types including mesothelial cells and initiate the recognition and defense against mycobacterial infection. In the present study, we investigated direct immune responses of PMCs against two mycobacterial strains, M. bovis vaccine strain Bacille Calmette-Guérin (BCG) and M. tuberculosis virulent strain H37Rv, and the role of TLR2 in such responses. Infection with BCG and H37Rv increased the production of IL-6, CXCL1, and CCL2 in WT PMCs, which was partially impaired in TLR2-deficient cells. In addition, the activation of NF-κB and MAPKs induced by BCG and H37Rv was suppressed in TLR2-deficient PMCs, as compared with the WT cells. TLR2 deficiency led to the decrease of nitric oxide (NO) production through the delayed gene expression of iNOS in PMCs. TLR2 was also shown to be essential for optimal expression of cellular adhesion molecules such as ICAM-1 and VCAM-1 in PMCs in response to BCG and H37Rv. These findings strongly suggest that TLR2 participates in mycobacteria-induced innate immune responses in PMCs and may play a role in pathogenesis of tuberculosis pleural effusion.
Collapse
Affiliation(s)
- Eun-Ha Hwanga
- Laboratory Animal Medicine, College of Veterinary Medicine and BK 21 PLUS Project Team, Chonnam National University, Gwangju 61186, Republic of Korea; National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungbuk 28116, Republic of Korea
| | - Tae-Hyoun Kim
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester, Rochester, NY 14642, USA
| | - Ji-Yeon Park
- Laboratory Animal Medicine, College of Veterinary Medicine and BK 21 PLUS Project Team, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jung Joo Hong
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungbuk 28116, Republic of Korea
| | - Dong-Hyun Kim
- Center for Integrative Rheumatoid Transcriptomics and Dynamics, The Catholic University, Seoul 06591, Republic of Korea
| | - Sang-Jun Ha
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Soo-Jin Yang
- School of Bioresources and Bioscience, Chung-Ang University, Anseong 456-756, Republic of Korea
| | - Sung Jae Shin
- Department of Microbiology, Institute for Immunology and Immunological Diseases, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Jong-Hwan Park
- Laboratory Animal Medicine, College of Veterinary Medicine and BK 21 PLUS Project Team, Chonnam National University, Gwangju 61186, Republic of Korea.
| |
Collapse
|
23
|
Pahari S, Kaur G, Negi S, Aqdas M, Das DK, Bashir H, Singh S, Nagare M, Khan J, Agrewala JN. Reinforcing the Functionality of Mononuclear Phagocyte System to Control Tuberculosis. Front Immunol 2018; 9:193. [PMID: 29479353 PMCID: PMC5811511 DOI: 10.3389/fimmu.2018.00193] [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] [Received: 09/15/2017] [Accepted: 01/23/2018] [Indexed: 12/12/2022] Open
Abstract
The mononuclear phagocyte system (MPS) constitutes dendritic cells, monocytes, and macrophages. This system contributes to various functions that are essential for maintaining homeostasis, activation of innate immunity, and bridging it with the adaptive immunity. Consequently, MPS is highly important in bolstering immunity against the pathogens. However, MPS is the frontline cells in destroying Mycobacterium tuberculosis (Mtb), yet the bacterium prefers to reside in the hostile environment of macrophages. Therefore, it may be very interesting to study the struggle between Mtb and MPS to understand the outcome of the disease. In an event when MPS predominates Mtb, the host remains protected. By contrast, the situation becomes devastating when the pathogen tames and tunes the host MPS, which ultimately culminates into tuberculosis (TB). Hence, it becomes extremely crucial to reinvigorate MPS functionality to overwhelm Mtb and eliminate it. In this article, we discuss the strategies to bolster the function of MPS by exploiting the molecules associated with the innate immunity and highlight the mechanisms involved to overcome the Mtb-induced suppression of host immunity. In future, such approaches may provide an insight to develop immunotherapeutics to treat TB.
Collapse
Affiliation(s)
- Susanta Pahari
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Gurpreet Kaur
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Shikha Negi
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Mohammad Aqdas
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Deepjyoti K Das
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Hilal Bashir
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Sanpreet Singh
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Mukta Nagare
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Junaid Khan
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Javed N Agrewala
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh, India
| |
Collapse
|
24
|
Lee JY, Lee MS, Kim DJ, Yang SJ, Lee SJ, Noh EJ, Shin SJ, Park JH. Nucleotide-Binding Oligomerization Domain 2 Contributes to Limiting Growth of Mycobacterium abscessus in the Lung of Mice by Regulating Cytokines and Nitric Oxide Production. Front Immunol 2017; 8:1477. [PMID: 29163541 PMCID: PMC5681718 DOI: 10.3389/fimmu.2017.01477] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Accepted: 10/20/2017] [Indexed: 12/22/2022] Open
Abstract
Mycobacterium abscessus is a prominent cause of pulmonary infection in immunosuppressed patients and those with cystic fibrosis. Nucleotide-binding oligomerization domain (NOD) 2 is a cytosolic receptor which senses a bacterial peptidoglycan component, muramyl dipeptide (MDP). Although nucleotide-binding oligomerization domain 2 (NOD2) contributes to protect host against various microbial infections, it is still unclear whether NOD2 is essential to regulate host immune responses against M. abscessus infection. In this study, we sought to clarify the role of NOD2 and the underlying mechanism in host defense against M. abscessus infection. Mice were infected intranasally with M. abscessus and sacrificed at indicated time points. Bacterial survival, cytokines production, and pathology in the lungs were determined. Bone marrow-derived macrophages were used to clarify cellular mechanism of NOD2-mediated immune response. Bacterial clearance was impaired, and pathology was more severe in the lungs of NOD2-deficient mice compared with the wild-type mice. In macrophages, NOD2-mediated activation of p38 and JNK were required for production of proinflammatory cytokines and nitric oxide (NO) and expression of iNOS in response to M. abscessus. NO was critical for limiting intracellular growth of the pathogen. Intranasal administration of MDP reduced in vivo bacterial replication and thus improved lung pathology in M. abscessus-infected mice. This study offers important new insights into the potential roles of the NOD2 in initiating and potentiating innate immune response against M. abscessus pulmonary infection.
Collapse
Affiliation(s)
- Jun-Young Lee
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Moo-Seung Lee
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Dong-Jae Kim
- Laboratory Animal Resource Center, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, South Korea
| | - Soo-Jin Yang
- School of Bioresources and Bioscience, Chung-Ang University, Anseong, South Korea
| | - Sang-Jin Lee
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| | - Eui-Jeong Noh
- Department of Obstetrics and Gynecology, College of Medicine, Konyang University, Daejeon, South Korea
| | - Sung Jae Shin
- Department of Microbiology, Institute for Immunology and Immunological Diseases, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Jong-Hwan Park
- Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, South Korea
| |
Collapse
|
25
|
Gharun K, Senges J, Seidl M, Lösslein A, Kolter J, Lohrmann F, Fliegauf M, Elgizouli M, Alber M, Vavra M, Schachtrup K, Illert AL, Gilleron M, Kirschning CJ, Triantafyllopoulou A, Henneke P. Mycobacteria exploit nitric oxide-induced transformation of macrophages into permissive giant cells. EMBO Rep 2017; 18:2144-2159. [PMID: 29097394 DOI: 10.15252/embr.201744121] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 09/23/2017] [Accepted: 10/02/2017] [Indexed: 12/11/2022] Open
Abstract
Immunity to mycobacteria involves the formation of granulomas, characterized by a unique macrophage (MΦ) species, so-called multinucleated giant cells (MGC). It remains unresolved whether MGC are beneficial to the host, that is, by prevention of bacterial spread, or whether they promote mycobacterial persistence. Here, we show that the prototypical antimycobacterial molecule nitric oxide (NO), which is produced by MGC in excessive amounts, is a double-edged sword. Next to its antibacterial capacity, NO propagates the transformation of MΦ into MGC, which are relatively permissive for mycobacterial persistence. The mechanism underlying MGC formation involves NO-induced DNA damage and impairment of p53 function. Moreover, MGC have an unsurpassed potential to engulf mycobacteria-infected apoptotic cells, which adds a further burden to their antimycobacterial capacity. Accordingly, mycobacteria take paradoxical advantage of antimicrobial cellular efforts by driving effector MΦ into a permissive MGC state.
Collapse
Affiliation(s)
- Kourosh Gharun
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Julia Senges
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Maximilian Seidl
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Pathology, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Anne Lösslein
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Julia Kolter
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Florens Lohrmann
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Spemann Graduate School for Biology and Medicine (SGBM), University of Freiburg, Freiburg, Germany.,Department of Rheumatology and Clinical Immunology, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Manfred Fliegauf
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Magdeldin Elgizouli
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - Martina Vavra
- Division of Infectious Diseases, Department of Internal Medicine 2, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Kristina Schachtrup
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Anna L Illert
- Department of Medicine I, Medical Center, University of Freiburg, Faculty of Medicine University of Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Martine Gilleron
- Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Carsten J Kirschning
- Institute of Medical Microbiology, Medical Center, University Duisburg-Essen, Essen, Germany
| | - Antigoni Triantafyllopoulou
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Department of Rheumatology and Clinical Immunology, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Philipp Henneke
- Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany .,Center for Pediatrics and Adolescent Medicine, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| |
Collapse
|
26
|
Jamaati H, Mortaz E, Pajouhi Z, Folkerts G, Movassaghi M, Moloudizargari M, Adcock IM, Garssen J. Nitric Oxide in the Pathogenesis and Treatment of Tuberculosis. Front Microbiol 2017; 8:2008. [PMID: 29085351 PMCID: PMC5649180 DOI: 10.3389/fmicb.2017.02008] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 09/29/2017] [Indexed: 12/21/2022] Open
Abstract
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), is globally known as one of the most important human pathogens. Mtb is estimated to infect nearly one third of the world's population with many subjects having a latent infection. Thus, from an estimated 2 billion people infected with Mtb, less than 10% may develop symptomatic TB. This indicates that the host immune system may constrain pathogen replication in most infected individuals. On entering the lungs of the host, Mtb initially encounters resident alveolar macrophages which can engulf and subsequently eliminate intracellular microbes via a plethora of bactericidal mechanisms including the generation of free radicals such as reactive oxygen and nitrogen species. Nitric oxide (NO), a key anti-mycobacterial molecule, is detected in the exhaled breath of patients infected with Mtb. Recent knowledge regarding the regulatory role of NO in airway function and Mtb proliferation paves the way of exploiting the beneficial effects of this molecule for the treatment of airway diseases. Here, we discuss the importance of NO in the pathogenesis of TB, the diagnostic use of exhaled and urinary NO in Mtb infection and the potential of NO-based treatments.
Collapse
Affiliation(s)
- Hamidreza Jamaati
- Chronic Respiratory Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Esmaeil Mortaz
- Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Zeinab Pajouhi
- Chronic Respiratory Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Gert Folkerts
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Mehrnaz Movassaghi
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Milad Moloudizargari
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ian M Adcock
- Cell and Molecular Biology Group, Airways Disease Section, Faculty of Medicine, National Heart and Lung Institute, Imperial College London, London, United Kingdom.,Priority Research Centre for Asthma and Respiratory Disease, Hunter Medical Research Institute, University of Newcastle, Newcastle, NSW, Australia
| | - Johan Garssen
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands.,Nutricia Research Centre for Specialized Nutrition, Utrecht, Netherlands
| |
Collapse
|
27
|
Arcos J, Sasindran SJ, Moliva JI, Scordo JM, Sidiki S, Guo H, Venigalla P, Kelley HV, Lin G, Diangelo L, Silwani SN, Zhang J, Turner J, Torrelles JB. Mycobacterium tuberculosis cell wall released fragments by the action of the human lung mucosa modulate macrophages to control infection in an IL-10-dependent manner. Mucosal Immunol 2017; 10:1248-1258. [PMID: 28000679 PMCID: PMC5479761 DOI: 10.1038/mi.2016.115] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 10/31/2016] [Indexed: 02/04/2023]
Abstract
Mycobacterium tuberculosis (M.tb), the causative agent of tuberculosis, is a major public health challenge facing the world. During infection, M.tb is deposited in the lung alveolar space where it comes in contact with the lung mucosa, known as alveolar lining fluid (ALF), an environment that M.tb encounters at different stages of the infection and disease. ALF is abundant in homeostatic and antimicrobial hydrolytic enzymes, also known as hydrolases. Here we demonstrate that ALF hydrolases, at their physiological concentrations and upon contact with M.tb, release M.tb cell envelope fragments into the milieu. These released fragments are bioactive, but non-cytotoxic, regulate the function of macrophages, and thus are capable of modulating the immune response contributing to the control of M.tb infection by human macrophages. Specifically, macrophages exposed to fragments derived from the exposure of M.tb to ALF were able to control the infection primarily by increasing phagosome-lysosome fusion and acidification events. This enhanced control was found to be dependent on fragment-induced interleukin-10 (IL-10) production but also involves the STAT3 signaling pathway in an IL-10-independent manner. Collectively our data indicate that M.tb fragments released upon contact with lung mucosa hydrolases participate in the host immune response to M.tb infection through innate immune modulation.
Collapse
Affiliation(s)
- Jesus Arcos
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Smitha J. Sasindran
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Juan I. Moliva
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Julia M. Scordo
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Sabeen Sidiki
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Hui Guo
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Poornima Venigalla
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Holden V. Kelley
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Guoxin Lin
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Lauren Diangelo
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Sayeed N. Silwani
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Jian Zhang
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
- Center for Microbial Interface Biology, The Ohio State University, Columbus, OH, 43210, US
| | - Joanne Turner
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
- Center for Microbial Interface Biology, The Ohio State University, Columbus, OH, 43210, US
| | - Jordi B. Torrelles
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
- Center for Microbial Interface Biology, The Ohio State University, Columbus, OH, 43210, US
| |
Collapse
|
28
|
Sanjaya A, Elder JR, Shah DH. Identification of new CpG oligodeoxynucleotide motifs that induce expression of interleukin-1β and nitric oxide in avian macrophages. Vet Immunol Immunopathol 2017; 192:1-7. [PMID: 29042009 DOI: 10.1016/j.vetimm.2017.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 08/10/2017] [Accepted: 08/15/2017] [Indexed: 12/22/2022]
Abstract
Unmethylated CpG motifs are known to stimulate mammalian toll-like receptor-9 expressing cells such as macrophages. However, the magnitude of immune-stimulation by CpG-motif can be sequence- and host-specific, implying the importance of identifying new immune-stimulatory motifs. This study aimed to determine the frequency distribution of 256 unique hexamers CpG-motifs in the Salmonella genome and to characterize their immune-stimulatory activity in avian host. We synthesized 256 CpG oligodeoxynucleotides (CpG-ODNs) each containing triplicates of a unique hexamer CpG-motif and tested their ability to induce expression of pro-inflammatory cytokine IL-1β in avian macrophages using q-RT PCR in four rounds of screening assays. CpG-ODNs that induced significantly higher IL-1β expression were also subjected to Griess assay to determine their ability to induce nitric oxide (NO) production in avian macrophages. This analysis resulted in identification of 7 CpG-ODNs that consistently induced IL-1β expression and NO production in avian macrophages at a level similar to the expression achieved using commercially available PTO-CpG-ODN 2007 and LPS derived from Salmonella. To the best of our knowledge, this is the first report showing comprehensive screening of all possible unique CpG hexamer (n=256) motifs for their ability to induce IL-1β expression and NO production in avian macrophages. We also show that the newly identified CpG-motifs with high immune-stimulatory activity are widely distributed in Salmonella genome. The CpG-ODNs identified in this study may serve as promising immunoprophylactics to potentiate innate responses in chickens against Salmonella and other infectious agents.
Collapse
Affiliation(s)
- Astia Sanjaya
- Department of Veterinary Microbiology and Pathology, United States
| | - Jacob R Elder
- Department of Veterinary Microbiology and Pathology, United States
| | - Devendra H Shah
- Department of Veterinary Microbiology and Pathology, United States; Paul Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7040, United States.
| |
Collapse
|
29
|
Braverman J, Stanley SA. Nitric Oxide Modulates Macrophage Responses to Mycobacterium tuberculosis Infection through Activation of HIF-1α and Repression of NF-κB. THE JOURNAL OF IMMUNOLOGY 2017; 199:1805-1816. [PMID: 28754681 DOI: 10.4049/jimmunol.1700515] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/03/2017] [Indexed: 12/26/2022]
Abstract
IFN-γ is essential for control of Mycobacterium tuberculosis infection in vitro and in vivo. However, the mechanisms by which IFN-γ controls infection remain only partially understood. One of the crucial IFN-γ target genes required for control of M. tuberculosis is inducible NO synthase (iNOS). Although NO produced by iNOS is thought to have direct bactericidal activity against M. tuberculosis, the role of NO as a signaling molecule has been poorly characterized in the context M. tuberculosis infection. In this study, we found that iNOS broadly regulates the macrophage transcriptome during M. tuberculosis infection, activating antimicrobial pathways while also limiting inflammatory cytokine production. The transcription factor hypoxia inducible factor-1α (HIF-1α) was recently shown to be critical for IFN-γ-mediated control of M. tuberculosis infection. We found that HIF-1α function requires NO production, and that HIF-1α and iNOS are linked by a positive feedback loop that amplifies macrophage activation. Furthermore, we found that NO inhibits NF-κB activity to prevent hyperinflammatory responses. Thus, NO activates robust microbicidal programs while also limiting damaging inflammation. IFN-γ signaling must carefully calibrate an effective immune response that does not cause excessive tissue damage, and this study identifies NO as a key player in establishing this balance during M. tuberculosis infection.
Collapse
Affiliation(s)
- Jonathan Braverman
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720; and
| | - Sarah A Stanley
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720; and .,Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA 94720
| |
Collapse
|
30
|
Putri DU, Rintiswati N, Soesatyo MHNE, Haryana SM. Immune modulation properties of herbal plant leaves: Phyllanthus niruri aqueous extract on immune cells of tuberculosis patient - in vitro study. Nat Prod Res 2017; 32:463-467. [DOI: 10.1080/14786419.2017.1311888] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Denise Utami Putri
- Faculty of Medicine, Graduate Program of Medical and Health Science, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Ning Rintiswati
- Faculty of Medicine, Department of Microbiology, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Marsetyawan HNE Soesatyo
- Faculty of Medicine, Department of Histology and Cell Biology, Universitas Gadjah Mada, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Sofia Mubarika Haryana
- Faculty of Medicine, Department of Histology and Cell Biology, Universitas Gadjah Mada, Universitas Gadjah Mada, Yogyakarta, Indonesia
| |
Collapse
|
31
|
Singh D, Tanwar H, Jayashankar B, Sharma J, Murthy S, Chanda S, Singh SB, Ganju L. Quercetin exhibits adjuvant activity by enhancing Th2 immune response in ovalbumin immunized mice. Biomed Pharmacother 2017; 90:354-360. [PMID: 28380410 DOI: 10.1016/j.biopha.2017.03.067] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/12/2017] [Accepted: 03/22/2017] [Indexed: 01/16/2023] Open
Abstract
Quercetin, one of the most abundant of plant flavonoids, has been studied with a great deal of attention over the last several decades mainly for its properties in inflammation and allergy. In this study, we are reporting for the first time the in vivo immunostimulatory activity of quercetin in ovalbumin immunized Balb/c mice. Administration of quercetin (50mg/kg body weight) along with ovalbumin antigen showed increased ovalbumin specific serum IgG antibody titres in comparison to the control group (p<0.05). Quercetin administration not only showed predominance of Th2 immune response by increasing the IgG1 antibody titres, but also increased the infiltration of CD11c+ dendritic cells in the mouse peritoneum and also increased LPS activated IL-1β and nitric oxide (NO) production by peritoneal macrophages. Expression of Tbx21, GATA-3 and Oct-2 proteins also enhanced in splenocytes of quercetin administered mice. Quercetin also did not cause any hemolysis in human RBCs. Overall, our findings strongly demonstrate the novel in vivo immunostimulatory and adjuvant potentials of quercetin.
Collapse
Affiliation(s)
- Divya Singh
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India.
| | - Himanshi Tanwar
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India
| | | | - Jyoti Sharma
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India
| | - Swetha Murthy
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India
| | - Sudipta Chanda
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India
| | - Shashi Bala Singh
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India
| | - Lilly Ganju
- Defence Institute of Physiology & Allied Sciences (DIPAS), Delhi, India
| |
Collapse
|
32
|
Tanner R, O’Shea MK, White AD, Müller J, Harrington-Kandt R, Matsumiya M, Dennis MJ, Parizotto EA, Harris S, Stylianou E, Naranbhai V, Bettencourt P, Drakesmith H, Sharpe S, Fletcher HA, McShane H. The influence of haemoglobin and iron on in vitro mycobacterial growth inhibition assays. Sci Rep 2017; 7:43478. [PMID: 28256545 PMCID: PMC5335253 DOI: 10.1038/srep43478] [Citation(s) in RCA: 28] [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: 10/24/2016] [Accepted: 01/24/2017] [Indexed: 01/04/2023] Open
Abstract
The current vaccine against tuberculosis, live attenuated Mycobacterium bovis BCG, has variable efficacy, but development of an effective alternative is severely hampered by the lack of an immune correlate of protection. There has been a recent resurgence of interest in functional in vitro mycobacterial growth inhibition assays (MGIAs), which provide a measure of a range of different immune mechanisms and their interactions. We identified a positive correlation between mean corpuscular haemoglobin and in vitro growth of BCG in whole blood from healthy UK human volunteers. Mycobacterial growth in peripheral blood mononuclear cells (PBMC) from both humans and macaques was increased following the experimental addition of haemoglobin (Hb) or ferric iron, and reduced following addition of the iron chelator deferoxamine (DFO). Expression of Hb genes correlated positively with mycobacterial growth in whole blood from UK/Asian adults and, to a lesser extent, in PBMC from South African infants. Taken together our data indicate an association between Hb/iron levels and BCG growth in vitro, which may in part explain differences in findings between whole blood and PBMC MGIAs and should be considered when using such assays.
Collapse
Affiliation(s)
- Rachel Tanner
- The Jenner Institute, University of Oxford, Oxford, UK
| | | | | | - Julius Müller
- The Jenner Institute, University of Oxford, Oxford, UK
| | | | | | | | | | | | | | | | | | - Hal Drakesmith
- Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Sally Sharpe
- Public Health England, Porton Down, Salisbury, UK
| | | | - Helen McShane
- The Jenner Institute, University of Oxford, Oxford, UK
| |
Collapse
|
33
|
Sengupta S, Naz S, Das I, Ahad A, Padhi A, Naik SK, Ganguli G, Pattanaik KP, Raghav SK, Nandicoori VK, Sonawane A. Mycobacterium tuberculosis EsxL inhibits MHC-II expression by promoting hypermethylation in class-II transactivator loci in macrophages. J Biol Chem 2017; 292:6855-6868. [PMID: 28209712 DOI: 10.1074/jbc.m117.775205] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 02/13/2017] [Indexed: 12/13/2022] Open
Abstract
Mycobacterium tuberculosis is known to modulate the host immune responses to facilitate its persistence inside the host cells. One of the key mechanisms includes repression of class-II transactivator (CIITA) and MHC-II expression in infected macrophages. However, the precise mechanism of CIITA and MHC-II down-regulation is not well studied. M. tuberculosis 6-kDa early secretory antigenic target (ESAT-6) is a known potent virulence and antigenic determinant. The M. tuberculosis genome encodes 23 such ESAT-6 family proteins. We herein report that M. tuberculosis and M. bovis bacillus Calmette-Guérin infection down-regulated the expression of CIITA/MHC-II by inducing hypermethylation in histone H3 lysine 9 (H3K9me2/3). Further, we showed that M. tuberculosis ESAT-6 family protein EsxL, encoded by Rv1198, is responsible for the down-regulation of CIITA/MHC-II by inducing H3K9me2/3. We further report that M. tuberculosis esxL induced the expression of nitric-oxide synthase, NO production, and p38 MAPK pathway, which in turn was responsible for the increased H3K9me2/3 in CIITA via up-regulation of euchromatic histone-lysine N-methyltransferase 2 (G9a). In contrast, inhibition of nitric-oxide synthase, p38 MAPK, and G9a abrogated H3K9me2/3, resulting in increased CIITA expression. A chromatin immunoprecipitation assay confirmed that hypermethylation at the promoter IV region of CIITA is mainly responsible for CIITA down-regulation and subsequent antigen presentation. We found that co-culture of macrophages infected with esxL-expressing M. smegmatis and mouse splenocytes led to down-regulation of IL-2, a key cytokine involved in T-cell proliferation. In summary, we demonstrate that M. tuberculosis EsxL inhibits antigen presentation by enhancing H3K9me2/3 at the CIITA promoter, thereby repressing its expression through NO and p38 MAPK activation.
Collapse
Affiliation(s)
- Srabasti Sengupta
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Saba Naz
- the National Institute of Immunology, New Delhi, Delhi 110067, India, and
| | - Ishani Das
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Abdul Ahad
- the Institute of Life Science, Nalco Square, Bhubaneswar, Orissa 751023, India
| | - Avinash Padhi
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Sumanta Kumar Naik
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Geetanjali Ganguli
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Kali Prasad Pattanaik
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Sunil Kumar Raghav
- the Institute of Life Science, Nalco Square, Bhubaneswar, Orissa 751023, India
| | | | - Avinash Sonawane
- From the School of Biotechnology, KIIT University, Bhubaneswar, Orissa 751024, India,
| |
Collapse
|
34
|
Peddireddy V, Doddam SN, Ahmed N. Mycobacterial Dormancy Systems and Host Responses in Tuberculosis. Front Immunol 2017; 8:84. [PMID: 28261197 PMCID: PMC5309233 DOI: 10.3389/fimmu.2017.00084] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 01/18/2017] [Indexed: 12/15/2022] Open
Abstract
Tuberculosis (TB) caused by the intracellular pathogen, Mycobacterium tuberculosis (Mtb), claims more than 1.5 million lives worldwide annually. Despite promulgation of multipronged strategies to prevent and control TB, there is no significant downfall occurring in the number of new cases, and adding to this is the relapse of the disease due to the emergence of antibiotic resistance and the ability of Mtb to remain dormant after primary infection. The pathology of Mtb is complex and largely attributed to immune-evading strategies that this pathogen adopts to establish primary infection, its persistence in the host, and reactivation of pathogenicity under favorable conditions. In this review, we present various biochemical, immunological, and genetic strategies unleashed by Mtb inside the host for its survival. The bacterium enables itself to establish a niche by evading immune recognition via resorting to masking, establishment of dormancy by manipulating immune receptor responses, altering innate immune cell fate, enhancing granuloma formation, and developing antibiotic tolerance. Besides these, the regulatory entities, such as DosR and its regulon, encompassing various putative effector proteins play a vital role in maintaining the dormant nature of this pathogen. Further, reactivation of Mtb allows relapse of the disease and is favored by the genes of the Rtf family and the conditions that suppress the immune system of the host. Identification of target genes and characterizing the function of their respective antigens involved in primary infection, dormancy, and reactivation would likely provide vital clues to design novel drugs and/or vaccines for the control of dormant TB.
Collapse
Affiliation(s)
- Vidyullatha Peddireddy
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad , Hyderabad , India
| | - Sankara Narayana Doddam
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad , Hyderabad , India
| | - Niyaz Ahmed
- Pathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad, India; Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research Bangladesh (icddr,b), Dhaka, Bangladesh
| |
Collapse
|
35
|
Fernandes GFDS, de Souza PC, Marino LB, Chegaev K, Guglielmo S, Lazzarato L, Fruttero R, Chung MC, Pavan FR, Dos Santos JL. Synthesis and biological activity of furoxan derivatives against Mycobacterium tuberculosis. Eur J Med Chem 2016; 123:523-531. [PMID: 27508879 DOI: 10.1016/j.ejmech.2016.07.039] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/16/2016] [Accepted: 07/19/2016] [Indexed: 12/21/2022]
Abstract
Tuberculosis (TB) remains a serious health problem responsible to cause millions of deaths annually. The scenario becomes alarming when it is evaluated that the number of new drugs does not increase proportionally to the emergence of resistance to the current therapy. Furoxan derivatives, known as nitric oxide (NO) donors, have been described to exhibit antitubercular activity. Herein, a novel series of hybrid furoxan derivatives (1,2,5-oxadiazole 2-N-oxide) (compounds 4a-c, 8a-c and 14a-c) were designed, synthesized and evaluated in vitro against Mycobacterium tuberculosis (MTB) H37Rv (ATCC 27294) and a clinical isolate MDR-TB strain. The furoxan derivatives have exhibited MIC90 values ranging from 1.03 to 62 μM (H37Rv) and 7.0-50.0 μM (MDR-TB). For the most active compounds (8c, 14a, 14b and 14c) the selectivity index ranged from 3.78 to 52.74 (MRC-5 cells) and 1.25-34.78 (J774A.1 cells). In addition, it was characterized for those compounds logPo/w values between 2.1 and 2.9. All compounds were able to release NO at levels ranging from 0.16 to 44.23%. Among the series, the phenylsulfonyl furoxan derivatives (compounds 14a-c) were the best NO-donor with the lowest MIC90 values. The most active compound (14c) was also stable at different pHs (5.0 and 7.4). In conclusion, furoxan derivatives were identified as new promising compounds useful to treat tuberculosis.
Collapse
Affiliation(s)
| | - Paula Carolina de Souza
- School of Pharmaceutical Sciences, UNESP - Univ Estadual Paulista, Araraquara, 14800903, Brazil
| | | | - Konstantin Chegaev
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, 10124, Italy
| | - Stefano Guglielmo
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, 10124, Italy
| | - Loretta Lazzarato
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, 10124, Italy
| | - Roberta Fruttero
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, 10124, Italy
| | - Man Chin Chung
- School of Pharmaceutical Sciences, UNESP - Univ Estadual Paulista, Araraquara, 14800903, Brazil
| | - Fernando Rogério Pavan
- School of Pharmaceutical Sciences, UNESP - Univ Estadual Paulista, Araraquara, 14800903, Brazil
| | - Jean Leandro Dos Santos
- School of Pharmaceutical Sciences, UNESP - Univ Estadual Paulista, Araraquara, 14800903, Brazil.
| |
Collapse
|
36
|
STAT3 Represses Nitric Oxide Synthesis in Human Macrophages upon Mycobacterium tuberculosis Infection. Sci Rep 2016; 6:29297. [PMID: 27384401 PMCID: PMC4935992 DOI: 10.1038/srep29297] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 06/17/2016] [Indexed: 12/21/2022] Open
Abstract
Mycobacterium tuberculosis is a successful intracellular pathogen. Numerous host innate immune responses signaling pathways are induced upon mycobacterium invasion, however their impact on M. tuberculosis replication is not fully understood. Here we reinvestigate the role of STAT3 specifically inside human macrophages shortly after M. tuberculosis uptake. We first show that STAT3 activation is mediated by IL-10 and occurs in M. tuberculosis infected cells as well as in bystander non-colonized cells. STAT3 activation results in the inhibition of IL-6, TNF-α, IFN-γ and MIP-1β. We further demonstrate that STAT3 represses iNOS expression and NO synthesis. Accordingly, the inhibition of STAT3 is detrimental for M. tuberculosis intracellular replication. Our study thus points out STAT3 as a key host factor for M. tuberculosis intracellular establishment in the early stages of macrophage infection.
Collapse
|
37
|
Folk WR, Smith A, Song H, Chuang D, Cheng J, Gu Z, Sun G. Does Concurrent Use of Some Botanicals Interfere with Treatment of Tuberculosis? Neuromolecular Med 2016; 18:483-6. [PMID: 27155670 DOI: 10.1007/s12017-016-8402-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 05/02/2016] [Indexed: 01/20/2023]
Abstract
Millions of individuals with active TB do not receive recommended treatments, and instead may use botanicals, or use botanicals concurrently with established treatments. Many botanicals protect against oxidative stress, but this can interfere with redox-dependent activation of isoniazid and other prodrugs used for prophylaxis and treatment of TB, as suggested by results of a recent clinical trial of the South African botanical Sutherlandia frutescens (L.) R. Br. (Sutherlandia). Here we provide a brief summary of Sutherlandia's effects upon rodent microglia and neurons relevant to tuberculosis of the central nervous system (CNS-TB). We have observed that ethanolic extracts of Sutherlandia suppress production of reactive oxygen species (ROS) in rat primary cortical neurons stimulated by NMDA and also suppress LPS- and interferon γ (IFNγ)-induced ROS and nitric oxide (NO) production by microglial cells. Sutherlandia consumption mitigates microglial activation in the hippocampus and striatum of ischemic brains of mice. RNAseq analysis indicates that Sutherlandia suppresses gene expression of oxidative stress, inflammatory signaling and toll-like receptor pathways that can reduce the host's immune response to infection and reactivation of latent Mycobacterium tuberculosis. As a precautionary measure, we recommend that individuals receiving isoniazid for pulmonary or cerebral TB, be advised not to concurrently use botanicals or dietary supplements having antioxidant activity.
Collapse
Affiliation(s)
- William R Folk
- Department of Biochemistry, University of Missouri, Columbia, MO, 65211, USA.
| | - Aaron Smith
- Department of Biochemistry, University of Missouri, Columbia, MO, 65211, USA
| | - Hailong Song
- Department of Pathology and Anatomical Sciences, University of Missouri, Columbia, MO, 65211, USA
- Center for Translational Neurosciences, University of Missouri, Columbia, MO, 65211, USA
| | - Dennis Chuang
- Department of Pathology and Anatomical Sciences, University of Missouri, Columbia, MO, 65211, USA
- Center for Translational Neurosciences, University of Missouri, Columbia, MO, 65211, USA
| | - Jianlin Cheng
- Department of Computer Science, University of Missouri, Columbia, MO, 65211, USA
| | - Zezong Gu
- Department of Pathology and Anatomical Sciences, University of Missouri, Columbia, MO, 65211, USA
- Center for Translational Neurosciences, University of Missouri, Columbia, MO, 65211, USA
| | - Grace Sun
- Department of Biochemistry, University of Missouri, Columbia, MO, 65211, USA
- Department of Pathology and Anatomical Sciences, University of Missouri, Columbia, MO, 65211, USA
- Center for Translational Neurosciences, University of Missouri, Columbia, MO, 65211, USA
| |
Collapse
|
38
|
Tan HY, Yong YK, Shankar EM, Paukovics G, Ellegård R, Larsson M, Kamarulzaman A, French MA, Crowe SM. Aberrant Inflammasome Activation Characterizes Tuberculosis-Associated Immune Reconstitution Inflammatory Syndrome. THE JOURNAL OF IMMUNOLOGY 2016; 196:4052-63. [DOI: 10.4049/jimmunol.1502203] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 03/13/2016] [Indexed: 12/31/2022]
|
39
|
Mycobacterial disease in patients with chronic granulomatous disease: A retrospective analysis of 71 cases. J Allergy Clin Immunol 2016; 138:241-248.e3. [PMID: 26936803 DOI: 10.1016/j.jaci.2015.11.041] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 11/08/2015] [Accepted: 11/20/2015] [Indexed: 11/20/2022]
Abstract
BACKGROUND Chronic granulomatous disease (CGD) is a rare primary immunodeficiency caused by inborn errors of the phagocyte nicotinamide adenine dinucleotide phosphate oxidase complex. From the first year of life onward, most affected patients display multiple, severe, and recurrent infections caused by bacteria and fungi. Mycobacterial infections have also been reported in some patients. OBJECTIVE Our objective was to assess the effect of mycobacterial disease in patients with CGD. METHODS We analyzed retrospectively the clinical features of mycobacterial disease in 71 patients with CGD. Tuberculosis and BCG disease were diagnosed on the basis of microbiological, pathological, and/or clinical criteria. RESULTS Thirty-one (44%) patients had tuberculosis, and 53 (75%) presented with adverse effects of BCG vaccination; 13 (18%) had both tuberculosis and BCG infections. None of these patients displayed clinical disease caused by environmental mycobacteria, Mycobacterium leprae, or Mycobacterium ulcerans. Most patients (76%) also had other pyogenic and fungal infections, but 24% presented solely with mycobacterial disease. Most patients presented a single localized episode of mycobacterial disease (37%), but recurrence (18%), disseminated disease (27%), and even death (18%) were also observed. One common feature in these patients was an early age at presentation for BCG disease. Mycobacterial disease was the first clinical manifestation of CGD in 60% of these patients. CONCLUSION Mycobacterial disease is relatively common in patients with CGD living in countries in which tuberculosis is endemic, BCG vaccine is mandatory, or both. Adverse reactions to BCG and severe forms of tuberculosis should lead to a suspicion of CGD. BCG vaccine is contraindicated in patients with CGD.
Collapse
|
40
|
Glutamate Dehydrogenase Is Required by Mycobacterium bovis BCG for Resistance to Cellular Stress. PLoS One 2016; 11:e0147706. [PMID: 26824899 PMCID: PMC4732601 DOI: 10.1371/journal.pone.0147706] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/07/2016] [Indexed: 11/19/2022] Open
Abstract
We recently reported on our success to generate deletion mutants of the genes encoding glutamate dehydrogenase (GDH) and glutamine oxoglutarate aminotransferase (GOGAT) in M. bovis BCG, despite their in vitro essentiality in M. tuberculosis. We could use these mutants to delineate the roles of GDH and GOGAT in mycobacterial nitrogen metabolism by using M. bovis BCG as a model for M. tuberculosis specifically. Here, we extended our investigation towards the involvement of GDH and GOGAT in other aspects of M. bovis BCG physiology, including the use of glutamate as a carbon source and resistance to known phagosomal stresses, as well as in survival inside macrophages. We find that gdh is indispensable for the utilization of glutamate as a major carbon source, in low pH environments and when challenged with nitric oxide. On the other hand, the gltBD mutant had increased viability under low pH conditions and was unaffected by a challenge with nitric oxide. Strikingly, GDH was required to sustain M. bovis BCG during infection of both murine RAW 264.7 and bone-marrow derived and macrophages, while GOGAT was not. We conclude that the catabolism of glutamate in slow growing mycobacteria may be a crucial function during infection of macrophage cells and demonstrate a novel requirement for M. bovis BCG GDH in the protection against acidic and nitrosative stress. These results provide strong clues on the role of GDH in intracellular survival of M. tuberculosis, in which the essentiality of the gdh gene complicates knock out studies making the study of the role of this enzyme in pathogenesis difficult.
Collapse
|
41
|
Setiabudi R, Mertaniasih NM, Didik Handijatmo D, Setyoningrum RA. CELLULAR IMMUNITY ACTIVATION METHOD BY STIMULATING RD1 COMPLEX PROTEINS AS VIRULENCE MARKER ON Mycobacterium tuberculum TO ESTABLISH DIAGNOSIS ON TUBERCULOSIS AND LATENT TUBERCULOSIS INFECTION. INDONESIAN JOURNAL OF TROPICAL AND INFECTIOUS DISEASE 2016. [DOI: 10.20473/ijtid.v6i1.1205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study was intended to invent a simpler and more affordable method to establish diagnosis on Tuberculosis (TB) and Latent Tuberculosis infection (LTBI). Similar to “Quantiferon TB Gold In Tube” (QFT-GIT) and T.SPOT.TB methods, the researchers also utilized “early secreted antigenic target 6kDa” (ESAT-6) and “cultur filtrate protein 10kDa” (CFP-10) proteins to be induced on the specimen. ESAT-6 and CFP-10 are commercial products used to induce interferon gamma (INF-γ) which were to be read using sophisticated and expensive equipment. This study was intended to conduct an analysis on effective cocktail protein modification, i.e. ESAT-6, CFP-10 and Ag85A/B/C, with high validity to detect cellular immunity activity through in vitro examination on peripheral blood monocyte cells of Tuberculosis-suspected patients or patients with latent tuberculosis infection. Peripheral Blood Monocyte Cells (PBMCs) activity on children tuberculosis patient or Latent Tuberculosis Infection (LTBI), adult tuberculosis patient or LTBI, which induced by cocktail protein modification and not induced, were analyzed microscopically. The activity of PBMCs on children and adult tuberculosis patient or LTBI induced by RD1 secretory proteins: ESAT-6, CFP-10, Ag85A/B/C was higher compared to PBMCs which had not been induced by the secretory proteins. Cellular debris and monocyte cells with abnormal shapes were found on PBMCs which had been induced by RD1 secretory proteins at 8 th day after culture.
Collapse
|
42
|
SADEGHI S, SEYED N, RAFATI S, TAHERI T. Optimization of the Timing of Induction for the Assessment of Nitric Oxide Production in Leishmania major Infected Macrophage Cells. IRANIAN JOURNAL OF PARASITOLOGY 2016; 11:325-331. [PMID: 28127337 PMCID: PMC5256048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND The present study was conducted to investigate the optimized timing for macrophages induction and nitric oxide (NO) production against invading Leishmania parasite. METHODS The present study examined the murine macrophage cell line, B10R, in three different states. In the first state, the cells were first infected with L. major and then treated with IFN-γ and LPS as stimulants. In the second state, the cells were infected after stimulation with IFN-γ and LPS. In the third state, the cells were only exposed to stimulants as controls. In all the three states, cell culture supernatants were collected at three points in time (6, 24 and 48 h) and the amount of NO production was measured using Griess assay. RESULTS The treatment of macrophages with inducers prior to infection with stationary phase parasite led to the secretion of significant amounts of NO, particularly at early time points quit contrary to the cells infected with parasites prior to induction. The amount of NO produced by cells induced after infection was detected significantly lower. CONCLUSION The induction of macrophages prior to infection with parasites leads to the production and secretion of greater amounts of NO, resulting in an increased ability to suppress and inhibit parasite proliferation even in the early stages of infection.
Collapse
Affiliation(s)
- Somaye SADEGHI
- Dept. of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, Tehran, Iran,Immunogenetic Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Negar SEYED
- Dept. of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, Tehran, Iran
| | - Sima RAFATI
- Dept. of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, Tehran, Iran
| | - Tahereh TAHERI
- Dept. of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, Tehran, Iran,Correspondence
| |
Collapse
|
43
|
Mohanty S, Dal Molin M, Ganguli G, Padhi A, Jena P, Selchow P, Sengupta S, Meuli M, Sander P, Sonawane A. Mycobacterium tuberculosis EsxO (Rv2346c) promotes bacillary survival by inducing oxidative stress mediated genomic instability in macrophages. Tuberculosis (Edinb) 2015; 96:44-57. [PMID: 26786654 DOI: 10.1016/j.tube.2015.11.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/09/2015] [Accepted: 11/17/2015] [Indexed: 12/19/2022]
Abstract
Mycobacterium tuberculosis (Mtb) survives inside the macrophages by modulating the host immune responses in its favor. The 6-kDa early secretory antigenic target (ESAT-6; esxA) of Mtb is known as a potent virulence and T-cell antigenic determinant. At least 23 such ESAT-6 family proteins are encoded in the genome of Mtb; however, the function of many of them is still unknown. We herein report that ectopic expression of Mtb Rv2346c (esxO), a member of ESAT-6 family proteins, in non-pathogenic Mycobacterium smegmatis strain (MsmRv2346c) aids host cell invasion and intracellular bacillary persistence. Further mechanistic studies revealed that MsmRv2346c infection abated macrophage immunity by inducing host cell death and genomic instability as evident from the appearance of several DNA damage markers. We further report that the induction of genomic instability in infected cells was due to increase in the hosts oxidative stress responses. MsmRv2346c infection was also found to induce autophagy and modulate the immune function of macrophages. In contrast, blockade of Rv2346c induced oxidative stress by treatment with ROS inhibitor N-acetyl-L-cysteine prevented the host cell death, autophagy induction and genomic instability in infected macrophages. Conversely, MtbΔRv2346c mutant did not show any difference in intracellular survival and oxidative stress responses. We envision that Mtb ESAT-6 family protein Rv2346c dampens antibacterial effector functions namely by inducing oxidative stress mediated genomic instability in infected macrophages, while loss of Rv2346c gene function may be compensated by other redundant ESAT-6 family proteins. Thus EsxO plays an important role in mycobacterial pathogenesis in the context of innate immunity.
Collapse
Affiliation(s)
- Soumitra Mohanty
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - Michael Dal Molin
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 32, CH 8006 Zurich, Switzerland
| | | | - Avinash Padhi
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - Prajna Jena
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - Petra Selchow
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 32, CH 8006 Zurich, Switzerland
| | - Srabasti Sengupta
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India
| | - Michael Meuli
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 32, CH 8006 Zurich, Switzerland
| | - Peter Sander
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 32, CH 8006 Zurich, Switzerland; National Reference Laboratory for Mycobacteria, Gloriastrasse 30, CH 8006 Zurich, Switzerland
| | - Avinash Sonawane
- School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India.
| |
Collapse
|
44
|
Lara-Rodríguez C, Alvarado-Vásquez N, Bernal D, Gorocica P, Zenteno E, Lascuraín R. CD3+ICOS+ T cells show differences in the synthesis of nitric oxide, IFN-γ, and IL-10 in patients with pulmonary tuberculosis or in healthy household contacts. Clin Exp Med 2015; 16:481-491. [DOI: 10.1007/s10238-015-0380-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 07/28/2015] [Indexed: 11/28/2022]
|
45
|
Covarrubias AJ, Aksoylar HI, Horng T. Control of macrophage metabolism and activation by mTOR and Akt signaling. Semin Immunol 2015; 27:286-96. [PMID: 26360589 PMCID: PMC4682888 DOI: 10.1016/j.smim.2015.08.001] [Citation(s) in RCA: 242] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 08/19/2015] [Accepted: 08/19/2015] [Indexed: 12/31/2022]
Abstract
Macrophages are pleiotropic cells that assume a variety of functions depending on their tissue of residence and tissue state. They maintain homeostasis as well as coordinate responses to stresses such as infection and metabolic challenge. The ability of macrophages to acquire diverse, context-dependent activities requires their activation (or polarization) to distinct functional states. While macrophage activation is well understood at the level of signal transduction and transcriptional regulation, the metabolic underpinnings are poorly understood. Importantly, emerging studies indicate that metabolic shifts play a pivotal role in control of macrophage activation and acquisition of context-dependent effector activities. The signals that drive macrophage activation impinge on metabolic pathways, allowing for coordinate control of macrophage activation and metabolism. Here we discuss how mTOR and Akt, major metabolic regulators and targets of such activation signals, control macrophage metabolism and activation. Dysregulated macrophage activities contribute to many diseases, including infectious, inflammatory, and metabolic diseases and cancer, thus a better understanding of metabolic control of macrophage activation could pave the way to the development of new therapeutic strategies.
Collapse
Affiliation(s)
- Anthony J Covarrubias
- Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, 655 Huntington Ave, II-115, Boston, MA 02115, USA
| | - H Ibrahim Aksoylar
- Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, 655 Huntington Ave, II-115, Boston, MA 02115, USA
| | - Tiffany Horng
- Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, 655 Huntington Ave, II-115, Boston, MA 02115, USA.
| |
Collapse
|
46
|
Szulc-Kielbik I, Brzezinska M, Kielbik M, Brzostek A, Dziadek J, Kania K, Sulowska Z, Krupa A, Klink M. Mycobacterium tuberculosis RecA is indispensable for inhibition of the mitogen-activated protein kinase-dependent bactericidal activity of THP-1-derived macrophages in vitro. FEBS J 2015; 282:1289-306. [PMID: 25639683 DOI: 10.1111/febs.13219] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 01/19/2015] [Accepted: 01/19/2015] [Indexed: 11/30/2022]
Abstract
Our knowledge about the mechanisms utilized by Mycobacterium tuberculosis to survive inside macrophages is still incomplete. One of the mechanism that protects M. tuberculosis from the host's microbicidal products and allows bacteria to survive involves DNA repair systems such as the homologous recombination (HR) and nonhomologous end-joining (NHEJ) pathways. It is accepted that any pathway that contributes to genome maintenance should be considered as potentially important virulence factor. In these studies, we investigated reactive oxygen species, nitric oxide and tumor necrosis factor-α production by macrophages infected with wild-type M. tuberculosis, with an HR-defective mutant (∆recA), with an NHEJ-defective mutant [∆(ku,ligD)], with a mutant defective for both HR and NHEJ [∆(ku,ligD,recA)], or with appropriate complemented strains. We also assessed the involvement of extracellular signal-regulated kinases (ERKs) 1 and 2 in the response of macrophages to infection with the above-mentioned strains, and ERK1/2 phosphorylation in M. tuberculosis-infected macrophages. We found that mutants lacking RecA induced a greater bactericidal response by macrophages than did the wild-type strain or an NHEJ-defective mutant, and activated ERK1/2 was involved only in the response of macrophages to recA deletion mutants [∆(ku,ligD,recA) and ∆recA]. We also demonstrated that only the triple mutant induced ERK1/2 phosphorylation in phorbol-12-myristate-13-acetate-stimulated macrophages. Moreover, HR-defective mutants induced lower amounts of tumor necrosis factor-α secretion than did the wild-type or ∆(ku,ligD). Our results indicate that RecA contributes to M. tuberculosis virulence, and also suggest that diminished ERK1/2 activation in macrophages infected with M. tuberculosis possessing recA may be an important mechanism by which wild-type mycobacteria escape intracellular killing.
Collapse
|
47
|
Wipasa J, Wongkulab P, Chawansuntati K, Chaiwarit R, Supparatpinyo K. Cellular immune responses in HIV-negative immunodeficiency with anti-interferon-γ antibodies and opportunistic intracellular microorganisms. PLoS One 2014; 9:e110276. [PMID: 25329064 PMCID: PMC4203775 DOI: 10.1371/journal.pone.0110276] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 09/15/2014] [Indexed: 01/15/2023] Open
Abstract
Background Cell-mediated immunity plays a crucial role in resistance to intracellular infection. We previously reported antibodies against interferon-gamma (IFN-γ) in HIV− negative (HIV−) patients with acquired immunodeficiency presenting with repeated episodes of disseminated infection caused by uncommon opportunistic intracellular fungal, bacterial, and viral pathogens. This follow-up study aimed to investigate cellular immune responses in these unusual patients. Methods Twenty HIV− patients presenting with ≥2 episodes of culture- or histopathologic-proven opportunistic infections were enrolled along with age- and sex-matched controls comprised of 20 HIV+ patients plus 20 healthy adults. Monocyte phenotyping and intracellular cytokine production were determined by staining with specific antibodies followed by flow cytometry. Anti-interferon-γ antibodies were measured by enzyme-linked immunosorbent assay, and inducible nitric oxide synthase by reverse-transcription polymerase chain reaction. Results There were no differences among cases, HIV+, and healthy controls in the percentage of monocytes, or CD68 and HLA-DR expression on their surfaces. FcR1 (CD119) expression on monocytes was significantly higher in cases than in HIV+ (p<0.05) and healthy controls (p<0.01), suggesting the presence of activated monocytes in the circulation. Interleukin (IL)-2 and tumor necrosis factor (TNF)-α production in CD4 cells were significantly lower in cases than in healthy controls (p<0.01 and p<0.001, respectively). CD8 production of TNF-α among cases was significantly lower than that of healthy controls (p<0.05). Conclusion Immunodeficiency in HIV− individuals with repeated infections with intracellular pathogens may be associated with one or more of the abnormal immune responses reflected by the reduced production of both IL-2 by CD4 T cells and TNF-α by CD4 T cells and CD8 T cells, as well as presence of anti-IFN-γ antibody, as previously reported.
Collapse
Affiliation(s)
- Jiraprapa Wipasa
- Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
| | | | | | | | - Khuanchai Supparatpinyo
- Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
- Department of Medicine, Chiang Mai University, Chiang Mai, Thailand
- * E-mail:
| |
Collapse
|
48
|
HONG SUHYUN, JEONG HUIKYUNG, HAN MINHO, PARK CHEOL, CHOI YUNGHYUN. Esculetin suppresses lipopolysaccharide-induced inflammatory mediators and cytokines by inhibiting nuclear factor-κB translocation in RAW 264.7 macrophages. Mol Med Rep 2014; 10:3241-6. [DOI: 10.3892/mmr.2014.2613] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 10/02/2014] [Indexed: 11/06/2022] Open
|
49
|
The endothelin system has a significant role in the pathogenesis and progression of Mycobacterium tuberculosis infection. Infect Immun 2014; 82:5154-65. [PMID: 25267836 DOI: 10.1128/iai.02304-14] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Tuberculosis (TB) remains a major global health problem, and although multiple studies have addressed the relationship between Mycobacterium tuberculosis and the host on an immunological level, few studies have addressed the impact of host physiological responses. Proteases produced by bacteria have been associated with important alterations in the host tissues, and a limited number of these enzymes have been characterized in mycobacterial species. M. tuberculosis produces a protease called Zmp1, which appears to be associated with virulence and has a putative action as an endothelin-converting enzyme. Endothelins are a family of vasoactive peptides, of which 3 distinct isoforms exist, and endothelin 1 (ET-1) is the most abundant and the best-characterized isoform. The aim of this work was to characterize the Zmp1 protease and evaluate its role in pathogenicity. Here, we have shown that M. tuberculosis produces and secretes an enzyme with ET-1 cleavage activity. These data demonstrate a possible role of Zmp1 for mycobacterium-host interactions and highlights its potential as a drug target. Moreover, the results suggest that endothelin pathways have a role in the pathogenesis of M. tuberculosis infections, and ETA or ETB receptor signaling can modulate the host response to the infection. We hypothesize that a balance between Zmp1 control of ET-1 levels and ETA/ETB signaling can allow M. tuberculosis adaptation and survival in the lung tissues.
Collapse
|
50
|
Macrophage arginase-1 controls bacterial growth and pathology in hypoxic tuberculosis granulomas. Proc Natl Acad Sci U S A 2014; 111:E4024-32. [PMID: 25201986 DOI: 10.1073/pnas.1408839111] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Lung granulomas develop upon Mycobacterium tuberculosis (Mtb) infection as a hallmark of human tuberculosis (TB). They are structured aggregates consisting mainly of Mtb-infected and -uninfected macrophages and Mtb-specific T cells. The production of NO by granuloma macrophages expressing nitric oxide synthase-2 (NOS2) via l-arginine and oxygen is a key protective mechanism against mycobacteria. Despite this protection, TB granulomas are often hypoxic, and bacterial killing via NOS2 in these conditions is likely suboptimal. Arginase-1 (Arg1) also metabolizes l-arginine but does not require oxygen as a substrate and has been shown to regulate NOS2 via substrate competition. However, in other infectious diseases in which granulomas occur, such as leishmaniasis and schistosomiasis, Arg1 plays additional roles such as T-cell regulation and tissue repair that are independent of NOS2 suppression. To address whether Arg1 could perform similar functions in hypoxic regions of TB granulomas, we used a TB murine granuloma model in which NOS2 is absent. Abrogation of Arg1 expression in macrophages in this setting resulted in exacerbated lung granuloma pathology and bacterial burden. Arg1 expression in hypoxic granuloma regions correlated with decreased T-cell proliferation, suggesting that Arg1 regulation of T-cell immunity is involved in disease control. Our data argue that Arg1 plays a central role in the control of TB when NOS2 is rendered ineffective by hypoxia.
Collapse
|