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Lu HJ, Guo D, Wei QQ. Potential of Neuroinflammation-Modulating Strategies in Tuberculous Meningitis: Targeting Microglia. Aging Dis 2024; 15:1255-1276. [PMID: 37196131 PMCID: PMC11081169 DOI: 10.14336/ad.2023.0311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 03/11/2023] [Indexed: 05/19/2023] Open
Abstract
Tuberculous meningitis (TBM) is the most severe complication of tuberculosis (TB) and is associated with high rates of disability and mortality. Mycobacterium tuberculosis (M. tb), the infectious agent of TB, disseminates from the respiratory epithelium, breaks through the blood-brain barrier, and establishes a primary infection in the meninges. Microglia are the core of the immune network in the central nervous system (CNS) and interact with glial cells and neurons to fight against harmful pathogens and maintain homeostasis in the brain through pleiotropic functions. However, M. tb directly infects microglia and resides in them as the primary host for bacillus infections. Largely, microglial activation slows disease progression. The non-productive inflammatory response that initiates the secretion of pro-inflammatory cytokines and chemokines may be neurotoxic and aggravate tissue injuries based on damages caused by M. tb. Host-directed therapy (HDT) is an emerging strategy for modulating host immune responses against diverse diseases. Recent studies have shown that HDT can control neuroinflammation in TBM and act as an adjunct therapy to antibiotic treatment. In this review, we discuss the diverse roles of microglia in TBM and potential host-directed TB therapies that target microglia to treat TBM. We also discuss the limitations of applying each HDT and suggest a course of action for the near future.
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Affiliation(s)
- Huan-Jun Lu
- Institute of Special Environmental Medicine, Nantong University, Jiangsu, China
| | - Daji Guo
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qian-Qi Wei
- Department of Infectious Diseases, General Hospital of Tibet Military Command, Xizang, China
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Vankayalapati A, Durojaye O, Mukherjee T, Paidipally P, Owusu-Afriyie B, Vankayalapati R, Radhakrishnan RK. Metabolic changes enhance necroptosis of type 2 diabetes mellitus mice infected with Mycobacterium tuberculosis. PLoS Pathog 2024; 20:e1012148. [PMID: 38728367 PMCID: PMC11086854 DOI: 10.1371/journal.ppat.1012148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 03/25/2024] [Indexed: 05/12/2024] Open
Abstract
Previously, we found that Mycobacterium tuberculosis (Mtb) infection in type 2 diabetes mellitus (T2DM) mice enhances inflammatory cytokine production which drives pathological immune responses and mortality. In the current study, using a T2DM Mtb infection mice model, we determined the mechanisms that make T2DM mice alveolar macrophages (AMs) more inflammatory upon Mtb infection. Among various cell death pathways, necroptosis is a major pathway involved in inflammatory cytokine production by T2DM mice AMs. Anti-TNFR1 antibody treatment of Mtb-infected AMs from T2DM mice significantly reduced expression of receptor interacting protein kinase 3 (RIPK3) and mixed lineage kinase domain-like (MLKL) (necroptosis markers) and IL-6 production. Metabolic profile comparison of Mtb-infected AMs from T2DM mice and Mtb-infected AMs of nondiabetic control mice indicated that 2-ketohexanoic acid and deoxyadenosine monophosphate were significantly abundant, and acetylcholine and pyridoxine (Vitamin B6) were significantly less abundant in T2DM mice AMs infected with Mtb. 2-Ketohexanoic acid enhanced expression of TNFR1, RIPK3, MLKL and inflammatory cytokine production in the lungs of Mtb-infected nondiabetic mice. In contrast, pyridoxine inhibited RIPK3, MLKL and enhanced expression of Caspase 3 (apoptosis marker) in the lungs of Mtb-infected T2DM mice. Our findings demonstrate that metabolic changes in Mtb-infected T2DM mice enhance TNFR1-mediated necroptosis of AMs, which leads to excess inflammation and lung pathology.
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Affiliation(s)
- Abhinav Vankayalapati
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
| | - Olamipejo Durojaye
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
| | - Tanmoy Mukherjee
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
| | - Padmaja Paidipally
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
| | - Bismark Owusu-Afriyie
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
| | - Ramakrishna Vankayalapati
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
| | - Rajesh Kumar Radhakrishnan
- Center for Biomedical Research, The University of Texas Health Science Center at Tyler, Tyler, Texas, United States of America
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Jain R, Kumari R, Chakraborty S, Mitra DK, Mohan A, Hadda V, Madan K, Guleria R. T-cell signature cytokines distinguish pulmonary sarcoidosis from pulmonary tuberculosis. Eur J Immunol 2023; 53:e2250255. [PMID: 37505436 DOI: 10.1002/eji.202250255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 06/12/2023] [Accepted: 06/20/2023] [Indexed: 07/29/2023]
Abstract
Sarcoidosis is a systemic inflammatory disorder characterized by tissue infiltration due to mononuclear phagocytes and lymphocytes and associated noncaseating granuloma formation. Pulmonary sarcoidosis (PS) shares a number of clinical, radiological, and histopathological characteristics with that of pulmonary tuberculosis (PTB). Due to this, clinicians face issues in differentiating between PS and PTB in a substantial number of cases. There is a lack of any specific biomarker that can diagnose PS distinctively from PTB. We compared T-cell-based signature cytokines in patients with PS and PTB. In this study, we proposed a serum biomarker panel consisting of cytokines from cells: T helper (Th) 1 [interferon-gamma (IFN-γ); tumor necrosis factor-alpha (TNF-α)], Th9 [interleukin (IL)-9], Th17 [IL-17], and T regulatory (Treg) [IL-10; transforming growth factor-beta (TGF-β)]. We performed the principal component analysis that demonstrated that our serum cytokine panel has a significant predictive ability to differentiate PS from PTB. Our results could aid clinicians to improve the diagnostic workflow for patients with PS in TB endemic settings where the diagnosis between PS and PTB is often ambiguous.
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Affiliation(s)
- Rashi Jain
- Department of Pulmonary Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Rinkee Kumari
- Department of Transplant Immunology and Immunogenetics, All India Institute of Medical Sciences, New Delhi, India
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Sushmita Chakraborty
- Department of Transplant Immunology and Immunogenetics, All India Institute of Medical Sciences, New Delhi, India
| | - Dipendra K Mitra
- Department of Transplant Immunology and Immunogenetics, All India Institute of Medical Sciences, New Delhi, India
| | - Anant Mohan
- Department of Pulmonary Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Vijay Hadda
- Department of Pulmonary Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Karan Madan
- Department of Pulmonary Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Randeep Guleria
- Department of Pulmonary Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India
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Sousa FDMD, Souza IDP, Amoras EDSG, Lima SS, Cayres-Vallinoto IMV, Ishak R, Vallinoto ACR, Queiroz MAF. Low levels of TNFA gene expression seem to favor the development of pulmonary tuberculosis in a population from the Brazilian Amazon. Immunobiology 2023; 228:152333. [PMID: 36630812 DOI: 10.1016/j.imbio.2023.152333] [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: 09/03/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
TNF-α is a Th1 cytokine profile active in the control of Mycobacterium tuberculosis infection, IL-10 is associated with persistence of bacterial infection. The aim of the study was to investigate the association of TNFA -308G/A and IL10 -819C/T polymorphisms and TNFA and IL10 gene expression levels with pulmonary and extrapulmonary tuberculosis (n = 200) and control (n = 200). The individuals were submitted to genotyping and quantification of gene expression performed by real-time quantitative polymerase chain reaction (qPCR). No association was observed between the frequencies of polymorphisms evaluated and pulmonary tuberculosis. The frequency of polymorphic genotypes for TNFA -308G/A were associated with the extrapulmonary tuberculosis (p = 0.0445). The levels of TNFA expression were lower in the pulmonary tuberculosis group than in the control (p = 0.0009). There was a positive correlation between the levels of TNFA and IL10 in patients with pulmonary tuberculosis (r = 0.560; p = 0.0103). Reduced levels of TNFA expression may promote the formation of an anti-inflammatory microenvironment, favoring the persistence of the bacillus in the host, contributing to the establishment of pulmonary tuberculosis.
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Affiliation(s)
- Francisca Dayse Martins de Sousa
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66.075-110, Brazil; Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém, Pará, Brazil
| | - Iury de Paula Souza
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66.075-110, Brazil; Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém, Pará, Brazil
| | - Ednelza da Silva Graça Amoras
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66.075-110, Brazil
| | - Sandra Souza Lima
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66.075-110, Brazil
| | | | - Ricardo Ishak
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66.075-110, Brazil
| | | | - Maria Alice Freitas Queiroz
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66.075-110, Brazil.
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Liang Y, Li X, Yang Y, Xiao L, Liang Y, Mi J, Xue Y, Gong W, Wang L, Wang J, Zhang J, Shi Y, Peng B, Chen X, Zhao W, Wu X. Preventive effects of Mycobacterium tuberculosis DNA vaccines on the mouse model with latent tuberculosis infection. Front Immunol 2023; 14:1110843. [PMID: 36860878 PMCID: PMC9968874 DOI: 10.3389/fimmu.2023.1110843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/31/2023] [Indexed: 02/15/2023] Open
Abstract
Background About a quarter of the world's population with latent tuberculosis infection (LTBI) are the main source of active tuberculosis. Bacillus Calmette Guerin (BCG) cannot effectively control LTBI individuals from developing diseases. Latency-related antigens can induce T lymphocytes of LTBI individuals to produce higher IFN-γ levels than tuberculosis patients and normal subjects. Herein, we firstly compared the effects of M. tuberculosis (MTB) ag85ab and 7 latent DNA vaccines on clearing latent MTB and preventing its activation in the mouse LTBI model. Methods A mouse LTBI model was established, and then immunized respectively with PBS, pVAX1 vector, Vaccae vaccine, ag85ab DNA and 7 kinds of latent DNAs (including rv1733c, rv2660c, rv1813c, rv2029c, rv2628, rv2659c and rv3407) for three times. The mice with LTBI were injected with hydroprednisone to activate the latent MTB. Then, the mice were sacrificed for the bacterial count, histopathological examination, and immunological evaluation. Results Using chemotherapy made the MTB latent in the infected mice, and then using hormone treatment reactivated the latent MTB, indicating that the mouse LTBI model was successfully established. After the mouse LTBI model was immunized with the vaccines, the lung colony-forming units (CFUs) and lesion degree of mice in all vaccines group were significantly decreased than those in the PBS group and vector group (P<0.0001, P<0.05). These vaccines could induce antigen-specific cellular immune responses. The number of IFN-γ effector T cells spots secreted by spleen lymphocytes in the ag85ab DNA group was significantly increased than those in the control groups (P<0.05). In the splenocyte culture supernatant, IFN-γ and IL-2 levels in the ag85ab, rv2029c, and rv2659c DNA groups significantly increased (P<0.05), and IL-17A levels in ag85ab and rv2659c DNA groups also significantly increased (P<0.05). Compared with the PBS and vector groups, the proportion of CD4+CD25+FOXP3+ regulatory T cells in spleen lymphocytes of ag85ab, rv2660c, rv2029c, and rv3407 DNA groups were significantly reduced (P<0.05). Conclusions MTB ag85ab and 7 kinds of latent DNA vaccines showed immune preventive efficacies on a mouse model of LTBI, especially the rv2659c, and rv1733c DNA. Our findings will provide candidates for the development of new multi-stage vaccines against TB.
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Affiliation(s)
- Yan Liang
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Xiaoping Li
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China,Department of Respiration, Hengdong People’s Hospital, Hengyang, China
| | - Yourong Yang
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Li Xiao
- Department of Respiration, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Yumei Liang
- Department of Pathology, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Jie Mi
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Yong Xue
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Wenping Gong
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Lan Wang
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Jie Wang
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Junxian Zhang
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Yingchang Shi
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Bizhen Peng
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Xiaoyang Chen
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China
| | - Weiguo Zhao
- Department of Respiration, the Eighth Medical Center of PLA General Hospital, Beijing, China,*Correspondence: Weiguo Zhao, ; Xueqiong Wu,
| | - Xueqiong Wu
- Tuberculosis Prevention and Control Key Laboratory, Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing, China,*Correspondence: Weiguo Zhao, ; Xueqiong Wu,
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Inflammation-mediated tissue damage in pulmonary tuberculosis and host-directed therapeutic strategies. Semin Immunol 2023; 65:101672. [PMID: 36469987 DOI: 10.1016/j.smim.2022.101672] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 11/04/2022] [Accepted: 11/08/2022] [Indexed: 12/04/2022]
Abstract
Treatment of tuberculosis (TB) involves the administration of anti-mycobacterial drugs for several months. The emergence of drug-resistant strains of Mycobacterium tuberculosis (Mtb, the causative agent) together with increased disease severity in people with co-morbidities such as diabetes mellitus and HIV have hampered efforts to reduce case fatality. In severe disease, TB pathology is largely attributable to over-exuberant host immune responses targeted at controlling bacterial replication. Non-resolving inflammation driven by host pro-inflammatory mediators in response to high bacterial load leads to pulmonary pathology including cavitation and fibrosis. The need to improve clinical outcomes and reduce treatment times has led to a two-pronged approach involving the development of novel antimicrobials as well as host-directed therapies (HDT) that favourably modulate immune responses to Mtb. HDT strategies incorporate aspects of immune modulation aimed at downregulating non-productive inflammatory responses and augmenting antimicrobial effector mechanisms to minimise pulmonary pathology and accelerate symptom resolution. HDT in combination with existing antimycobacterial agents offers a potentially promising strategy to improve the long-term outcome for TB patients. In this review, we describe components of the host immune response that contribute to inflammation and tissue damage in pulmonary TB, including cytokines, matrix metalloproteinases, lipid mediators, and neutrophil extracellular traps. We then proceed to review HDT directed at these pathways.
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Matteucci KC, Correa AAS, Costa DL. Recent Advances in Host-Directed Therapies for Tuberculosis and Malaria. Front Cell Infect Microbiol 2022; 12:905278. [PMID: 35669122 PMCID: PMC9163498 DOI: 10.3389/fcimb.2022.905278] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 04/21/2022] [Indexed: 11/30/2022] Open
Abstract
Tuberculosis (TB), caused by the bacterium Mycobacterium tuberculosis, and malaria, caused by parasites from the Plasmodium genus, are two of the major causes of death due to infectious diseases in the world. Both diseases are treatable with drugs that have microbicidal properties against each of the etiologic agents. However, problems related to treatment compliance by patients and emergence of drug resistant microorganisms have been a major problem for combating TB and malaria. This factor is further complicated by the absence of highly effective vaccines that can prevent the infection with either M. tuberculosis or Plasmodium. However, certain host biological processes have been found to play a role in the promotion of infection or in the pathogenesis of each disease. These processes can be targeted by host-directed therapies (HDTs), which can be administered in conjunction with the standard drug treatments for each pathogen, aiming to accelerate their elimination or to minimize detrimental side effects resulting from exacerbated inflammation. In this review we discuss potential new targets for the development of HDTs revealed by recent advances in the knowledge of host-pathogen interaction biology, and present an overview of strategies that have been tested in vivo, either in experimental models or in patients.
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Affiliation(s)
- Kely C. Matteucci
- Plataforma de Medicina Translacional Fundação Oswaldo Cruz/Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - André A. S. Correa
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
- Programa de Pós-Graduação em Imunologia Básica e Aplicada, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Diego L. Costa
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
- Programa de Pós-Graduação em Imunologia Básica e Aplicada, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
- *Correspondence: Diego L. Costa,
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Choudhury M, Virivinti J, Kandi S, Sritharan V, Sritharan M. Th2 immune response by the iron-regulated protein HupB of Mycobacterium tuberculosis. Indian J Tuberc 2022; 69:90-99. [PMID: 35074158 DOI: 10.1016/j.ijtb.2021.04.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 04/06/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND HupB is an iron-regulated protein essential for the growth of Mycobacterium tuberculosis inside macrophages. To investigate if HupB induced a dominant Th2 type immune response, we studied the effect of rHupB on PBMCs from TB patients and by infecting mouse macrophages with wild type and hupB KO mutants. METHODS PBMCs from pulmonary TB (n = 60), extra pulmonary TB (n = 23) and healthy controls (n = 30) were stimulated with purified HupB and the cytokines secreted were assayed. The sera were screened for anti-HupB antibodies by ELISA. Mouse macrophages cell line (RAW 264.7) was infected with wild type, hupB KO and hupB-complemented strains of M. tuberculosis grown in high and low iron medium and the expression of cytokines was assayed by qRT-PCR. RESULTS Murine macrophages infected with the hupB KO strain produced low levels of the pro-inflammatory cytokines IFN-γ, TNF-α, IL-1, and IL-18 and high levels of IL-10. HupB induced IL-6 and IL-10 production in PBMCs of TB patients and down-regulated IFN-γ and TNF-α production. The influence of HupB was remarkable in the EPTB group. CONCLUSION HupB shifted the immune response to the Th2 type. Low IFN-γ and elevated IL-10 in EPTB patients is noteworthy.
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Affiliation(s)
- Mitali Choudhury
- Department of Animal Biology, University of Hyderabad, Hyderabad, 500046, India
| | - Jahnavi Virivinti
- Molecular Diagnostics and Biomarkers Lab, Global Hospitals, Hyderabad, 500004, India
| | - Subhakar Kandi
- Kamineni Academy of Medical Sciences and Research Centre, Hyderabad, 500038, India
| | | | - Manjula Sritharan
- Department of Animal Biology, University of Hyderabad, Hyderabad, 500046, India.
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Boosting BCG with recombinant influenza A virus tuberculosis vaccines increases pulmonary T cell responses but not protection against Mycobacterium tuberculosis infection. PLoS One 2021; 16:e0259829. [PMID: 34793507 PMCID: PMC8601556 DOI: 10.1371/journal.pone.0259829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 10/27/2021] [Indexed: 11/19/2022] Open
Abstract
The current Mycobacterium bovis BCG vaccine provides inconsistent protection against pulmonary infection with Mycobacterium tuberculosis. Immunity induced by subcutaneous immunization with BCG wanes and does not promote early recruitment of T cell to the lungs after M. tuberculosis infection. Delivery of Tuberculosis (TB) vaccines to the lungs may increase and prolong immunity at the primary site of M. tuberculosis infection. Pulmonary immunization with recombinant influenza A viruses (rIAVs) expressing an immune-dominant M. tuberculosis CD4+ T cell epitope (PR8-p25 and X31-p25) stimulates protective immunity against lung TB infection. Here, we investigated the potential use of rIAVs to improve the efficacy of BCG using simultaneous immunization (SIM) and prime-boost strategies. SIM with parenteral BCG and intranasal PR8-p25 resulted in equivalent protection to BCG alone against early, acute and chronic M. tuberculosis infection. Boosting BCG with rIAVs increased the frequency of IFN-γ-secreting specific T cells (p<0.001) and polyfunctional CD4+ T cells (p<0.05) in the lungs compared to the BCG alone, however, this did not result in a significant increase in protection against M. tuberculosis compared to BCG alone. Therefore, sequential pulmonary immunization with these rIAVs after BCG increased M. tuberculosis-specific memory T cell responses in the lung, but not protection against M. tuberculosis infection.
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Qu X, Neuhoff C, Cinar MU, Pröll M, Tholen E, Tesfaye D, Hölker M, Schellander K, Uddin MJ. Epigenetic Modulation of TLR4 Expression by Sulforaphane Increases Anti-Inflammatory Capacity in Porcine Monocyte-Derived Dendritic Cells. BIOLOGY 2021; 10:biology10060490. [PMID: 34072812 PMCID: PMC8227201 DOI: 10.3390/biology10060490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/21/2021] [Accepted: 05/28/2021] [Indexed: 11/16/2022]
Abstract
Simple Summary Epigenetic modifications of the genes regulate the inflammation process that includes the DNA methylation and histone acetylation. Sulforaphane is well known for its immunomodulatory properties. Notably, the mechanism of its anti-inflammatory functions involving epigenetic modifications is unclear. This study highlighted the regulatory mechanism of sulforaphane in the innate immunity responses in an acute inflammatory state employ in vivo cell culture model. Porcine monocyte-derived dendritic cells were exposed to LPS with or without sulforaphane pre-treatment for these purposes. Epigenetics modulations of the important genes and regulatory factors were studies as well as the immune responses of the cells were vigorously studied over the period of time. This study deciphers the mechanism of SFN in restricting the excessive inflammatory reactions, thereby, exerting its protective and anti-inflammatory function though epigenetic mechanism. Abstract Inflammation is regulated by epigenetic modifications, including DNA methylation and histone acetylation. Sulforaphane (SFN), a histone deacetylase (HDAC) inhibitor, is also a potent immunomodulatory agent, but its anti-inflammatory functions through epigenetic modifications remain unclear. Therefore, this study aimed to investigate the epigenetic effects of SFN in maintaining the immunomodulatory homeostasis of innate immunity during acute inflammation. For this purpose, SFN-induced epigenetic changes and expression levels of immune-related genes in response to lipopolysaccharide (LPS) stimulation of monocyte-derived dendritic cells (moDCs) were analyzed. These results demonstrated that SFN inhibited HDAC activity and caused histone H3 and H4 acetylation. SFN treatment also induced DNA demethylation in the promoter region of the MHC-SLA1 gene, resulting in the upregulation of Toll-like receptor 4 (TLR4), MHC-SLA1, and inflammatory cytokines’ expression at 6 h of LPS stimulation. Moreover, the protein levels of cytokines in the cell culture supernatants were significantly inhibited by SFN pre-treatment followed by LPS stimulation in a time-dependent manner, suggesting that inhibition of HDAC activity and DNA methylation by SFN may restrict the excessive inflammatory cytokine availability in the extracellular environment. We postulate that SFN may exert a protective and anti-inflammatory function by epigenetically influencing signaling pathways in experimental conditions employing porcine moDCs.
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Affiliation(s)
- Xueqi Qu
- The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science, Shenzhen 518055, China
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
- Correspondence: (X.Q.); (C.N.)
| | - Christiane Neuhoff
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
- Correspondence: (X.Q.); (C.N.)
| | - Mehmet Ulas Cinar
- Department of Animal Science, Faculty of Agriculture, Erciyes University, 38039 Kayseri, Turkey;
| | - Maren Pröll
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
| | - Ernst Tholen
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
| | - Dawit Tesfaye
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
| | - Michael Hölker
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
| | - Karl Schellander
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
| | - Muhammad Jasim Uddin
- Institute of Animal Science, Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany; (M.P.); (E.T.); (D.T.); (M.H.); (K.S.); (M.J.U.)
- School of Veterinary Medicine, Murdoch University, Murdoch, WA 6150, Australia
- Department of Medicine, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
- School of Veterinary Science, University of Queensland, Gatton, QLD 4343, Australia
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11
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Gautam K, Negi S, Saini V. Targeting endogenous gaseous signaling molecules as novel host-directed therapies against tuberculosis infection. Free Radic Res 2021; 55:655-670. [PMID: 33641567 DOI: 10.1080/10715762.2021.1892091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Tuberculosis (TB) is a chronic pulmonary disease caused by Mycobacterium tuberculosis which is a major cause of morbidity and mortality worldwide. Due to the complexity of disease and its continuous global spread, there is an urgent need to improvise the strategies for prevention, diagnosis, and treatment. The current anti-TB regimen lasts for months and warrants strict compliance to clear infection and to minimize the risk of development of multi drug-resistant tuberculosis. This underscores the need to have new and improved therapeutics for TB treatment. Several studies have highlighted the unique ability of Mycobacterium tuberculosis to exploit host factors to support its survival inside the intracellular environment. One of the key players to mycobacterial disease susceptibility and infection are endogenous gases such as oxygen, nitric oxide, carbon monoxide and hydrogen sulfide. Nitric oxide and carbon monoxide as the physiological gaseous messengers are considered important to the outcome of Mycobacterium tuberculosis infection. The role of hydrogen sulfide in human tuberculosis is yet not fully elucidated, but this gas has been shown to play a significant role in bacterial respiration, growth and pathogenesis. This review will focus on the host factors majorly endogenous gaseous signaling molecules which contributes to Mycobacterium tuberculosis survival inside the intracellular environment and highlight the potential therapeutic targets.
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Affiliation(s)
- Kamini Gautam
- Laboratory of Infection Biology and Translational Research, Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sheetal Negi
- Laboratory of Infection Biology and Translational Research, Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Vikram Saini
- Laboratory of Infection Biology and Translational Research, Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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12
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Jaffey JA, Bessette M, Tao Z, Bradley-Siemens N, Thompson M. Effects of calcitriol on oxidative burst, phagocytic function, and leukocyte cytokine production in shelter dogs. Canine Med Genet 2020; 7:11. [PMID: 32924019 PMCID: PMC7477847 DOI: 10.1186/s40575-020-00090-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 08/04/2020] [Indexed: 12/22/2022] Open
Abstract
Background The active metabolite of vitamin D, calcitriol, has been shown across many different species to augment innate immune responses and dampen aberrant proinflammatory cytokine production. Community acquired infections are common in shelters and consume limited shelter resources, impact adoption rates, and can result in unnecessary euthanasia. Prophylactic oral vitamin D supplementation decreases the incidence and severity of upper and lower respiratory tract infections in humans. Before a clinical trial investigating the clinical benefit of oral vitamin D supplementation in shelter dogs can be pursued, an in vitro study evaluating the immunomodulatory effects of calcitriol in blood from shelter dogs is warranted. Therefore, the objective of this study was to determine if incubation of whole blood obtained from apparently healthy dogs housed in a shelter for ≥7 days with calcitriol would alter granulocyte/monocyte (GM) oxidative burst and phagocytic function as well as pathogen-associated molecular pattern (PAMP)-stimulated leukocyte production of tumor necrosis factor (TNF)-α, and interleukin (IL)-6, and IL-10. Results Ten dogs housed in a shelter for ≥7 days were enrolled in a prospective cohort study. Whole blood from these dogs was incubated with calcitriol (10− 7 M) or diluent (control) for 24 h. Subsequent to this incubation, phagocytosis of opsonized-Escherichia coli (E. coli) and E. coli-induced oxidative burst were evaluated via flow cytometry. In addition, leukocyte production of TNF-α, IL-6, and IL-10 were measured using a canine-specific multiplex bead assay. Calcitriol significantly decreased leukocyte TNF-α production (p = 0.009) and increased IL-10 production (p = 0.002). Tumor necrosis factor-α-to-IL-10 ratio was significantly decreased with calcitriol (p = 0.017), while IL-6 production as well as GM oxidative burst and phagocytic function were not significantly affected. Conclusions These data indicate that calcitriol attenuates proinflammatory immune responses without affecting GM oxidative burst or phagocytic function in vitro in whole blood obtained from apparently healthy shelter dogs.
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Affiliation(s)
- Jared A Jaffey
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308 USA
| | - Mariah Bessette
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308 USA
| | - Zenan Tao
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308 USA
| | - Nancy Bradley-Siemens
- Department of Pathology and Population Medicine, College of Veterinary Medicine, Midwestern University, 19555 N 59th Ave, Glendale, AZ 85308 USA
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13
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Junqueira-Kipnis AP, Trentini MM, Marques Neto LM, Kipnis A. Live Vaccines Have Different NK Cells and Neutrophils Requirements for the Development of a Protective Immune Response Against Tuberculosis. Front Immunol 2020; 11:741. [PMID: 32391021 PMCID: PMC7189015 DOI: 10.3389/fimmu.2020.00741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/01/2020] [Indexed: 12/24/2022] Open
Abstract
It has been shown that neutrophils drive NK cells to activate DCs while NK cells regulate neutrophils survival. In response to mycobacteria, NK cells proliferate and produces IFN-γ, that appears to regulate the neutrophilic inflammatory responses to both M. tuberculosis infection and BCG vaccination. Although the role of neutrophils in the immune response to tuberculosis is a matter of debate, neutrophils were shown to be crucial to induce specific response against mc2-CMX vaccine. The objective of this study was to investigate the interplay between NK cells and neutrophils in regard to the development of a protective immune response against M. tuberculosis. Depletion of NK cells during vaccination did not alter the total number of neutrophils or DCs, but reduced the number of activated DCs, thus reducing the generation of Th1 specific immune responses and the protection conferred by mc2-CMX and BCG vaccines. However, only in mc2-CMX vaccination that neutrophil depletion interfered with the NK cell numbers and protection. In conclusion, it was shown that only when both NK and neutrophils were present, specific Th1 response and protection was achieved by mc2-CMX vaccine, while neutrophils although activated upon BCG vaccination were not necessary for the induced protection.
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Affiliation(s)
- Ana Paula Junqueira-Kipnis
- Laboratory of Immunopathology of Infectious Disease, Department of Biosciences and Technology, Tropical Institute of Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
| | - Monalisa Martins Trentini
- Laboratory of Immunopathology of Infectious Disease, Department of Biosciences and Technology, Tropical Institute of Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
| | - Lázaro Moreira Marques Neto
- Laboratory of Immunopathology of Infectious Disease, Department of Biosciences and Technology, Tropical Institute of Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
| | - André Kipnis
- Laboratory of Molecular Bacteriology, Department of Biosciences and Technology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
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14
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Tezera LB, Bielecka MK, Ogongo P, Walker NF, Ellis M, Garay-Baquero DJ, Thomas K, Reichmann MT, Johnston DA, Wilkinson KA, Ahmed M, Jogai S, Jayasinghe SN, Wilkinson RJ, Mansour S, Thomas GJ, Ottensmeier CH, Leslie A, Elkington PT. Anti-PD-1 immunotherapy leads to tuberculosis reactivation via dysregulation of TNF-α. eLife 2020; 9:52668. [PMID: 32091388 PMCID: PMC7058383 DOI: 10.7554/elife.52668] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 02/19/2020] [Indexed: 12/14/2022] Open
Abstract
Previously, we developed a 3-dimensional cell culture model of human tuberculosis (TB) and demonstrated its potential to interrogate the host-pathogen interaction (Tezera et al., 2017a). Here, we use the model to investigate mechanisms whereby immune checkpoint therapy for cancer paradoxically activates TB infection. In patients, PD-1 is expressed in Mycobacterium tuberculosis (Mtb)-infected lung tissue but is absent in areas of immunopathology. In the microsphere model, PD-1 ligands are up-regulated by infection, and the PD-1/PD-L1 axis is further induced by hypoxia. Inhibition of PD-1 signalling increases Mtb growth, and augments cytokine secretion. TNF-α is responsible for accelerated Mtb growth, and TNF-α neutralisation reverses augmented Mtb growth caused by anti-PD-1 treatment. In human TB, pulmonary TNF-α immunoreactivity is increased and circulating PD-1 expression negatively correlates with sputum TNF-α concentrations. Together, our findings demonstrate that PD-1 regulates the immune response in TB, and inhibition of PD-1 accelerates Mtb growth via excessive TNF-α secretion.
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Affiliation(s)
- Liku B Tezera
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
- Institute for Life Sciences, University of SouthamptonSouthamptonUnited Kingdom
| | - Magdalena K Bielecka
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
| | - Paul Ogongo
- Africa Health Research InstituteKwaZulu NatalSouth Africa
- Department of Tropical and Infectious Diseases, Institute of Primate Research, National Museums of KenyaNairobiKenya
| | - Naomi F Walker
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape TownSouth Africa
- TB Centre and Department of Clinical Research, London School of Hygiene and Tropical MedicineLondonUnited Kingdom
- Department of Clinical Sciences, Liverpool School of Tropical MedicineLiverpoolUnited Kingdom
| | - Matthew Ellis
- NIHR Biomedical Research Centre, School of Cancer Sciences, University of SouthamptonSouthamptonUnited Kingdom
| | - Diana J Garay-Baquero
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
- Institute for Life Sciences, University of SouthamptonSouthamptonUnited Kingdom
| | - Kristian Thomas
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
| | - Michaela T Reichmann
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
| | - David A Johnston
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
| | | | - Mohamed Ahmed
- Africa Health Research InstituteKwaZulu NatalSouth Africa
| | - Sanjay Jogai
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
| | - Suwan N Jayasinghe
- BioPhysics Group, Department of Mechanical Engineering, University College LondonLondonUnited Kingdom
| | - Robert J Wilkinson
- The Francis Crick InstituteLondonUnited Kingdom
- Department of Infectious Diseases, Imperial College LondonLondonUnited Kingdom
| | - Salah Mansour
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
- Institute for Life Sciences, University of SouthamptonSouthamptonUnited Kingdom
| | - Gareth J Thomas
- NIHR Biomedical Research Centre, School of Cancer Sciences, University of SouthamptonSouthamptonUnited Kingdom
| | - Christian H Ottensmeier
- NIHR Biomedical Research Centre, School of Cancer Sciences, University of SouthamptonSouthamptonUnited Kingdom
| | - Alasdair Leslie
- Africa Health Research InstituteKwaZulu NatalSouth Africa
- Department of Infection and Immunity, University College LondonLondonUnited Kingdom
| | - Paul T Elkington
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of SouthamptonSouthamptonUnited Kingdom
- Institute for Life Sciences, University of SouthamptonSouthamptonUnited Kingdom
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15
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Arrazuria R, Ladero I, Molina E, Fuertes M, Juste R, Fernández M, Pérez V, Garrido J, Elguezabal N. Alternative Vaccination Routes against Paratuberculosis Modulate Local Immune Response and Interference with Tuberculosis Diagnosis in Laboratory Animal Models. Vet Sci 2020; 7:vetsci7010007. [PMID: 31936741 PMCID: PMC7157726 DOI: 10.3390/vetsci7010007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/29/2019] [Accepted: 01/08/2020] [Indexed: 01/21/2023] Open
Abstract
Paratuberculosis (PTB) is an enteric granulomatous disease caused by Mycobacterium avium subsp. paratuberculosis (MAP) that mainly affects ruminants. Current vaccines have shown to be cost–effective control reagents, although they are restricted due to cross-interference with bovine tuberculosis (bTB). Therefore, novel vaccination strategies are needed and this study is focused on evaluating alternative vaccination routes and their effect on the local immune response. The MAP oral challenge rabbit model was used to evaluate and compare an experimental inactivated MAP vaccine through oral (VOR) and intradermal (VID) routes. The VID group presented the highest proportion of animals with no visible lesions and the lowest proportion of animals with MAP positive tissues. Immunohistochemistry analysis revealed that the VID group presented a dominantly M1 polarized response indicating an ability to control MAP infection. In general, all vaccinated groups showed lower calprotectin levels compared to the non-vaccinated challenged group suggesting less active granulomatous lesions. The VID group showed some degree of skin test reactivity, whereas the same vaccine through oral administration was completely negative. These data show that PTB vaccination has an effect on macrophage polarization and that the route influences infection outcome and can also have an impact on bTB diagnosis. Future evaluation of new immunological products against mycobacterial diseases should consider assaying different vaccination routes.
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Affiliation(s)
- Rakel Arrazuria
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
| | - Iraia Ladero
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
| | - Elena Molina
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
| | - Miguel Fuertes
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
| | - Ramón Juste
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
| | - Miguel Fernández
- Department of Animal Health, Instituto de Ganadería de Montaña (CSIC-ULE), Facultad de Veterinaria, Universidad de León, E-24071 Leon, Spain; (M.F.); (V.P.)
| | - Valentín Pérez
- Department of Animal Health, Instituto de Ganadería de Montaña (CSIC-ULE), Facultad de Veterinaria, Universidad de León, E-24071 Leon, Spain; (M.F.); (V.P.)
| | - Joseba Garrido
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
| | - Natalia Elguezabal
- Animal Health Department, NEIKER-Instituto Vasco de Investigación y Desarrollo Agrario. Derio, E-48160 Bizkaia, Spain; (R.A.); (I.L.); (E.M.); (M.F.); (R.J.); (J.G.)
- Correspondence: ; Tel.: +34-94-403-4300
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16
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Vecchione MB, Laufer N, Sued O, Corti M, Salomon H, Quiroga MF. 7-oxo-DHEA enhances impaired M. tuberculosis-specific T cell responses during HIV-TB coinfection. J Biomed Sci 2020; 27:20. [PMID: 31906962 PMCID: PMC6943934 DOI: 10.1186/s12929-019-0604-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/19/2019] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Mycobacterium tuberculosis (Mtb) is the causative agent of tuberculosis (TB), affecting approximately one third of the world's population. Development of an adequate immune response will determine disease progression or progress to chronic infection. Risk of developing TB among human immunodeficiency virus (HIV)-coinfected patients (HIV-TB) is 20-30 times higher than those without HIV infection, and a synergistic interplay between these two pathogens accelerates the decline in immunological functions. TB treatment in HIV-TB coinfected persons is challenging and it has a prolonged duration, mainly due to the immune system failure to provide an adequate support for the therapy. Therefore, we aimed to study the role of the hormone 7-oxo-dehydroepiandrosterone (7-OD) as a modulator of anti-tuberculosis immune responses in the context of HIV-TB coinfection. METHODS A cross-sectional study was conducted among HIV-TB patients and healthy donors (HD). We characterized the ex vivo phenotype of CD4 + T cells and also evaluated in vitro antigen-specific responses by Mtb stimulation of peripheral blood mononuclear cells (PBMCs) in the presence or absence of 7-OD. We assessed lymphoproliferative activity, cytokine production and master transcription factor profiles. RESULTS Our results show that HIV-TB patients were not able to generate successful anti-tubercular responses in vitro compared to HD, as reduced IFN-γ/IL-10 and IFN-γ/IL-17A ratios were observed. Interestingly, treatment with 7-OD enhanced Th1 responses by increasing Mtb-induced proliferation and the production of IFN-γ and TNF-α over IL-10 levels. Additionally, in vitro Mtb stimulation augmented the frequency of cells with a regulatory phenotype, while 7-OD reduced the proportion of these subsets and induced an increase in CD4 + T-bet+ (Th1) subpopulation, which is associated with clinical data linked to an improved disease outcome. CONCLUSIONS We conclude that 7-OD modifies the cytokine balance and the phenotype of CD4 + T cells towards a more favorable profile for mycobacteria control. These results provide new data to delineate novel treatment approaches as co-adjuvant for the treatment of TB.
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Affiliation(s)
- María Belén Vecchione
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), Buenos Aires, Argentina
| | - Natalia Laufer
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), Buenos Aires, Argentina
| | - Omar Sued
- Área de Investigaciones Clínicas, Fundación Huésped, Buenos Aires, Argentina
| | - Marcelo Corti
- División "B" VIH/Sida, Hospital Francisco J. Muñiz, Buenos Aires, Argentina
| | - Horacio Salomon
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), Buenos Aires, Argentina
| | - Maria Florencia Quiroga
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), Buenos Aires, Argentina.
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SP110 Polymorphisms Are Genetic Markers for Vulnerability to Latent and Active Tuberculosis Infection in Taiwan. DISEASE MARKERS 2018; 2018:4687380. [PMID: 30627224 PMCID: PMC6304864 DOI: 10.1155/2018/4687380] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/15/2018] [Indexed: 12/25/2022]
Abstract
One-fourth of the human population is estimated to have been exposed to Mycobacterium tuberculosis (Mtb) and carries the infection in its latent form. This latent infection presents a lifelong risk of developing active tuberculosis (TB) disease, and persons with latent TB infection (LTBI) are significant contributors to the pool of active TB cases. Genetic polymorphisms among hosts have been shown to contribute to the outcome of Mtb infection. The SP110 gene, which encodes an interferon-induced nuclear protein, has been shown to control host innate immunity to Mtb infection. In this study, we provide experimental data demonstrating the ability of the gene to control genetic susceptibility to latent and active TB infection. Genetic variants of the SP110 gene were investigated in the Taiwanese population (including 301 pulmonary TB patients, 68 LTBI individuals, and 278 healthy household contacts of the TB patients), and their association with susceptibility to latent and active TB infection was examined by performing an association analysis in a case-control study. We identified several SNPs (rs7580900, rs7580912, rs9061, rs11556887, and rs2241525) in the SP110 gene that are associated with susceptibility to LTBI and/or TB disease. Our studies further showed that the same SNPs may have opposite effects on the control of susceptibility to LTBI versus TB. In addition, our analyses demonstrated that the SP110 rs9061 SNP was associated with tumor necrosis factor-α (TNFα) levels in plasma in LTBI subjects. The results suggest that the polymorphisms within SP110 have a role in controlling genetic susceptibility to latent and active TB infection in humans. To the best of our knowledge, this is the first report showing that the SP110 variants are associated with susceptibility to LTBI. Our study also demonstrated that the identified SP110 SNPs displayed the potential to predict the risk of LTBI and subsequent TB progression in Taiwan.
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18
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Protective effects of a traditional herbal extract from Stellaria dichotoma var. lanceolata against Mycobacterium abscessus infections. PLoS One 2018; 13:e0207696. [PMID: 30452471 PMCID: PMC6242687 DOI: 10.1371/journal.pone.0207696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 11/05/2018] [Indexed: 11/24/2022] Open
Abstract
Stellaria dichotoma var. lanceolata (SdLv), a member of the Caryophyllaceae, is a traditional herbal medicine that has been used to treat fever, night sweats, and malaria in East Asia. Inflammation plays an essential role in both host defense and pathogenesis during infection by diverse intracellular pathogens. Herein, we showed that an herbal extract from SdLv effectively attenuated inflammatory responses from infection of Mycobacterium abscessus (Mab), but not Toxoplasma gondii (T. gondii). In primary murine macrophages, Mab infection resulted in the rapid activation of nuclear factor (NF)-κB and mitogen-activated protein kinase (MAPK), as well as in the generation of proinflammatory cytokines, such as tumor necrosis factor α and interleukin-6, which were all significantly inhibited by pretreatment with SdLv. However, herbal extracts from Bupleurum chinense DC. (Buch) or Bupleurum falcatum L. (Bufa) did not affect M. abs-induced activation of proinflammatory responses. Importantly, we demonstrated that generation of intracellular reactive oxygen species, which are important signaling intermediaries in the activation of NF-κB and the MAPK signaling pathway, was rapidly increased in Mab-infected macrophages, and this was effectively suppressed by pretreatment with SdLv, but not Buch and Bufa. We further found that the treatment of Buch and Bufa, but not SdLv, led to the activation of NF-κB and the MAPK signaling pathway and the generation of intracellular reactive oxygen species. Moreover, oral administration of SdLv significantly reduced lethality in Mab-infected mice. Collectively, these results suggest the possible use of SdLv as an effective treatment for Mab infection.
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19
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Stek C, Allwood B, Walker NF, Wilkinson RJ, Lynen L, Meintjes G. The Immune Mechanisms of Lung Parenchymal Damage in Tuberculosis and the Role of Host-Directed Therapy. Front Microbiol 2018; 9:2603. [PMID: 30425706 PMCID: PMC6218626 DOI: 10.3389/fmicb.2018.02603] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 10/11/2018] [Indexed: 12/20/2022] Open
Abstract
Impaired lung function is common in people with a history of tuberculosis. Host-directed therapy added to tuberculosis treatment may reduce lung damage and result in improved lung function. An understanding of the pathogenesis of pulmonary damage in TB is fundamental to successfully predicting which interventions could be beneficial. In this review, we describe the different features of TB immunopathology that lead to impaired lung function, namely cavities, bronchiectasis, and fibrosis. We discuss the immunological processes that cause lung damage, focusing on studies performed in humans, and using chest radiograph abnormalities as a marker for pulmonary damage. We highlight the roles of matrix metalloproteinases, neutrophils, eicosanoids and cytokines, like tumor necrosis factor-α and interleukin 1β, as well as the role of HIV co-infection. Finally, we focus on various existing drugs that affect one or more of the immunological mediators of lung damage and could therefore play a role as host-directed therapy.
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Affiliation(s)
- Cari Stek
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Clinical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium.,Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Brian Allwood
- Division of Pulmonology, Department of Medicine, Stellenbosch University, Stellenbosch, South Africa
| | - Naomi F Walker
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Clinical Research, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Robert J Wilkinson
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa.,Department of Medicine, Imperial College London, London, United Kingdom.,Francis Crick Institute, London, United Kingdom
| | - Lutgarde Lynen
- Department of Clinical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium
| | - Graeme Meintjes
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa
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20
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Marimani M, Ahmad A, Duse A. The role of epigenetics, bacterial and host factors in progression of Mycobacterium tuberculosis infection. Tuberculosis (Edinb) 2018; 113:200-214. [PMID: 30514504 DOI: 10.1016/j.tube.2018.10.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 08/21/2018] [Accepted: 10/23/2018] [Indexed: 12/29/2022]
Abstract
Tuberculosis (TB) infection caused by Mycobacterium tuberculosis (Mtb) is still a persistent global health problem, particularly in developing countries. The World Health Organization (WHO) reported a mortality rate of about 1.8 million worldwide due to TB complications in 2015. The Bacillus Calmette-Guérin (BCG) vaccine was introduced in 1921 and is still widely used to prevent TB development. This vaccine offers up to 80% protection against various forms of TB; however its efficacy against lung infection varies among different geographical settings. Devastatingly, the development of various forms of drug-resistant TB strains has significantly impaired the discovery of effective and safe anti-bacterial agents. Consequently, this necessitated discovery of new drug targets and novel anti-TB therapeutics to counter infection caused by various Mtb strains. Importantly, various factors that contribute to TB development have been identified and include bacterial resuscitation factors, host factors, environmental factors and genetics. Furthermore, Mtb-induced epigenetic changes also play a crucial role in evading the host immune response and leads to bacterial persistence and dissemination. Recently, the application of GeneXpert MTB/RIF® to rapidly diagnose and identify drug-resistant strains and discovery of different molecular markers that distinguish between latent and active TB infection has motivated and energised TB research. Therefore, this review article will briefly discuss the current TB state, highlight various mechanisms employed by Mtb to evade the host immune response as well as to discuss some modern molecular techniques that may potentially target and inhibit Mtb replication.
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Affiliation(s)
- Musa Marimani
- Clinical Microbiology and Infectious Diseases, School of Pathology, Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Aijaz Ahmad
- Clinical Microbiology and Infectious Diseases, School of Pathology, Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; Infection Control, Charlotte Maxeke Johannesburg Academic Hospital, National Health Laboratory Service, South Africa.
| | - Adriano Duse
- Clinical Microbiology and Infectious Diseases, School of Pathology, Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; Infection Control, Charlotte Maxeke Johannesburg Academic Hospital, National Health Laboratory Service, South Africa
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21
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PPE11 of Mycobacterium tuberculosis can alter host inflammatory response and trigger cell death. Microb Pathog 2018; 126:45-55. [PMID: 30366125 DOI: 10.1016/j.micpath.2018.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 08/09/2018] [Accepted: 10/22/2018] [Indexed: 01/23/2023]
Abstract
Tuberculosis (TB), which is caused by Mycobacterium tuberculosis (Mtb), remains a serious global health problem. The PE/PPE family, featuring unique sequences, structures and expression in Mtb, is reported to interfere with the macrophage response to the pathogen and facilitate its infection. PPE11 (Rv0453) existed in pathogenic mycobacteria and was persistently expressed in the infected guinea pig lungs. However, the role it played in the pathogenesis remains unclear. Here, to investigate the interaction and potential mechanism of PPE11 between pathogens and hosts, we heterologously expressed PPE11 in non-pathogenic, rapidly growing Mycobacterium smegmatis strains. We found that the overexpression of the cell wall-associated protein, PPE11, can improve the viability of bacteria in the presence of lysozyme, hydrogen peroxide and acid stress. Expression of PPE11 enhanced the early survival of M. smegmatis in macrophages and sustained a higher bacterial load in mouse tissues that showed exacerbated organ pathology. Macrophages infected with recombinant M. smegmatis produced significantly greater amounts of interleukin (IL)-1β, IL-6, tumour necrosis factor (TNF)-α and an early decrease in IL-10 along with higher levels of host cell death. Similar cytokines changes were observed in the sera of infected mice. Accordingly, PPE11 protein causes histopathological changes by disrupting the dynamic balance of the inflammatory factors and promoting host-cell death, indicating a potential role in the virulence of Mtb.
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22
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Pro-inflammatory cytokines: The link between obesity and osteoarthritis. Cytokine Growth Factor Rev 2018; 44:38-50. [PMID: 30340925 DOI: 10.1016/j.cytogfr.2018.10.002] [Citation(s) in RCA: 471] [Impact Index Per Article: 78.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/06/2018] [Accepted: 10/08/2018] [Indexed: 02/05/2023]
Abstract
Osteoarthritis (OA), characterized by joint malfunction and chronic disability, is the most common form of arthritis. Clinical and animal experiments reveal that age-related OA is associated with many factors such as age, sex, trauma, and obesity. One of the most influential and modifiable risk factors is obesity. Obesity not only increases mechanical stress on the tibiofemoral cartilage, but also leads to a higher prevalence of OA in non-weight-bearing areas. There is a link between obesity and inflammation. Adipose tissues play a crucial role in this context because they are the major source of cytokines, chemokines, and metabolically-active mediators named adipokines. The adipokines, including adiponectin and leptin, have been demonstrated to regulate inflammatory immune responses in cartilage. Obese people and animals show a higher level of serum tumor necrosis factor-alpha (TNF-α), interleukin-1 beta (IL)-1β and IL-6, all of which are produced by macrophages derived from adipose tissue. These pro-inflammatory cytokines regulate the proliferation and apoptosis of adipocytes, promote lipolysis, inhibit lipid synthesis and decrease blood lipids through autocrine and paracrine mechanisms. Elevated levels of TNF-α, IL-1 and IL-6 have been found in the synovial fluid, synovial membrane, subchondral bone and cartilage of OA patients, confirming their important roles in OA pathogenesis. TNF-α, IL-6 and IL-1 are the factors released by fat to negatively regulate cartilage directly. Moreover, TNF-α, IL-1 and IL-6 can induce the production of other cytokines, matrix metalloproteinases (MMPs) and prostaglandins and inhibit the synthesis of proteoglycans and type II collagen; thus, they play a pivotal role in cartilage matrix degradation and bone resorption in OA. Activated chondrocytes also produce MMP-1, MMP-3, MMP-13, and aggrecanase 1 and 2 (ADAMTS-4, ADAMTS-5). In addition, IL-1, TNF-α and IL-6 may cause OA indirectly by regulating release of adiponectin and leptin from adipocytes. In this review, we first summarize the relationship between obesity and inflammation. Then we summarize the roles of IL-1, TNF-α and IL-6 in OA. We further discuss how IL-1, TNF-α and IL-6 regulate the communication between fat and OA, and their pathological roles in obesity-related OA. Lastly, we discuss the possibility of using the pro-inflammatory signaling pathway as a therapeutic target to develop drugs for obesity-related OA.
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Kim JK, Kim YS, Lee HM, Jin HS, Neupane C, Kim S, Lee SH, Min JJ, Sasai M, Jeong JH, Choe SK, Kim JM, Yamamoto M, Choy HE, Park JB, Jo EK. GABAergic signaling linked to autophagy enhances host protection against intracellular bacterial infections. Nat Commun 2018; 9:4184. [PMID: 30305619 PMCID: PMC6180030 DOI: 10.1038/s41467-018-06487-5] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 09/06/2018] [Indexed: 12/25/2022] Open
Abstract
Gamma-aminobutyric acid (GABA) is the principal inhibitory neurotransmitter in the brain; however, the roles of GABA in antimicrobial host defenses are largely unknown. Here we demonstrate that GABAergic activation enhances antimicrobial responses against intracellular bacterial infection. Intracellular bacterial infection decreases GABA levels in vitro in macrophages and in vivo in sera. Treatment of macrophages with GABA or GABAergic drugs promotes autophagy activation, enhances phagosomal maturation and antimicrobial responses against mycobacterial infection. In macrophages, the GABAergic defense is mediated via macrophage type A GABA receptor (GABAAR), intracellular calcium release, and the GABA type A receptor-associated protein-like 1 (GABARAPL1; an Atg8 homolog). Finally, GABAergic inhibition increases bacterial loads in mice and zebrafish in vivo, suggesting that the GABAergic defense plays an essential function in metazoan host defenses. Our study identified a previously unappreciated role for GABAergic signaling in linking antibacterial autophagy to enhance host innate defense against intracellular bacterial infection. Gamma-aminobutyric acid (GABA) is a major inhibitory neurotransmitter in neuronal systems, but the potential role for such neurotransmitters on the immune system are emerging. Here the authors show GABA signaling is linked to autophagy, enhancing the host response against intracellular bacteria.
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Affiliation(s)
- Jin Kyung Kim
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Yi Sak Kim
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Hye-Mi Lee
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Hyo Sun Jin
- Biomedical Research Institute, Chungnam National University Hospital, Daejeon, 35015, Korea
| | - Chiranjivi Neupane
- Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Physiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Sup Kim
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Sang-Hee Lee
- Institute of Molecular Biology & Genetics, Seoul National University, Seoul, 08826, Korea
| | - Jung-Joon Min
- Department of Nuclear Medicine, Chonnam National University Medical School, Gwangju, 61469, Korea
| | - Miwa Sasai
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871, Japan
| | - Jae-Ho Jeong
- Department of Microbiology, Chonnam National University Medical School, Gwangju, 61469, Korea.,Molecular Medicine, BK21 Plus, Chonnam National University Graduate School, Gwangju, 61186, Korea
| | - Seong-Kyu Choe
- Department of Microbiology and Center for Metabolic Function Regulation, Wonkwang University School of Medicine, Iksan, Jeonbuk, 54538, Korea
| | - Jin-Man Kim
- Department of Pathology, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Masahiro Yamamoto
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, 565-0871, Japan
| | - Hyon E Choy
- Department of Microbiology, Chonnam National University Medical School, Gwangju, 61469, Korea.,Molecular Medicine, BK21 Plus, Chonnam National University Graduate School, Gwangju, 61186, Korea
| | - Jin Bong Park
- Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea. .,Department of Physiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea.
| | - Eun-Kyeong Jo
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon, 35015, Korea
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24
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Longitudinal analysis of serum cytokine profile among patients with tubercular multifocal serpiginoid choroiditis: a pilot study. Eye (Lond) 2018; 33:129-135. [PMID: 30185832 DOI: 10.1038/s41433-018-0157-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 12/09/2017] [Accepted: 02/14/2018] [Indexed: 02/01/2023] Open
Abstract
PURPOSE To analyze the serum cytokines profile in patients with tubercular multifocal serpiginoid choroiditis (TB MSC) receiving anti-tubercular therapy (ATT) and oral corticosteroids. METHODS In this prospective longitudinal study, patients with active TB MSC were included. Serum levels of interferon (IFN)-γ, interleukin (IL)-10, and tumor necrosis factor (TNF)-α were analyzed using bead-based immunoassay. The levels of transforming growth factor (TGF)-β were measured using cytokine bead array. Serial measurement was performed at baseline, 1, 3, and 6 weeks after initiation of therapy. Patients developing paradoxical worsening (PW) of TB MSC were identified and their serum levels of cytokines were compared with those patients who showed healing of lesions. Comparison of cytokine levels with baseline values was also performed. RESULTS Twelve patients (three females) were included in the study. Four patients showed paradoxical worsening of TB MSC at 3.2 ± 1 weeks after initiation of therapy. Compared to patients who showed healing of lesions, patients with PW showed higher baseline IL-10 (not significant; p = 0.28). Among patients developing PW, levels of IFN-γ peaked at 1 week ((p = 0.01) and levels of TNF-α peaked at 3 weeks (p = 0.02) (coinciding with PW) compared to patients who showed healing. There was no significant difference in TGF-β levels at any time point in either group (p > 0.47). CONCLUSIONS Baseline and serial levels of inflammatory serum cytokines may help in predicting the response to ATT and corticosteroids in TB MSC. Patients with paradoxical worsening may show rise in pro-inflammatory cytokines after initiation of ATT indicating higher bacillary load.
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25
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Khan I, Agashe D, Rolff J. Early-life inflammation, immune response and ageing. Proc Biol Sci 2018; 284:rspb.2017.0125. [PMID: 28275145 DOI: 10.1098/rspb.2017.0125] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 02/13/2017] [Indexed: 12/30/2022] Open
Abstract
Age-related diseases are often attributed to immunopathology, which results in self-damage caused by an inappropriate inflammatory response. Immunopathology associated with early-life inflammation also appears to cause faster ageing, although we lack direct experimental evidence for this association. To understand the interactions between ageing, inflammation and immunopathology, we used the mealworm beetle Tenebrio molitor as a study organism. We hypothesized that phenoloxidase, an important immune effector in insect defence, may impose substantial immunopathological costs by causing tissue damage to Malpighian tubules (MTs; functionally equivalent to the human kidney), in turn accelerating ageing. In support of this hypothesis, we found that RNAi knockdown of phenoloxidase (PO) transcripts in young adults possibly reduced inflammation-induced autoreactive tissue damage to MTs, and increased adult lifespan. Our work thus suggests a causative link between immunopathological costs of early-life inflammation and faster ageing. We also reasoned that if natural selection weakens with age, older individuals should display increased immunopathological costs associated with an immune response. Indeed, we found that while old infected individuals cleared infection faster than young individuals, possibly they also displayed exacerbated immunopathological costs (larger decline in MT function) and higher post-infection mortality. RNAi-mediated knockdown of PO response partially rescued MTs function in older beetles and resulted in increased lifespan after infection. Taken together, our data are consistent with a direct role of immunopathological consequences of immune response during ageing in insects. Our work is also the first report that highlights the pervasive role of tissue damage under diverse contexts of ageing and immune response.
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Affiliation(s)
- Imroze Khan
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK, Bellary Road, Bangalore 560065, India .,Freie Universität Berlin, Institute of Biology, Königin-Luise Strasse 1-3, 14195 Berlin, Dahlem, Germany
| | - Deepa Agashe
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK, Bellary Road, Bangalore 560065, India
| | - Jens Rolff
- Freie Universität Berlin, Institute of Biology, Königin-Luise Strasse 1-3, 14195 Berlin, Dahlem, Germany
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26
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Belmellat N, Semerano L, Segueni N, Damotte D, Decker P, Ryffel B, Quesniaux V, Boissier MC, Assier E. Tumor Necrosis Factor-Alpha Targeting Can Protect against Arthritis with Low Sensitization to Infection. Front Immunol 2017; 8:1533. [PMID: 29184553 PMCID: PMC5694445 DOI: 10.3389/fimmu.2017.01533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/27/2017] [Indexed: 01/12/2023] Open
Abstract
Tumor necrosis factor-alpha (TNF-α) blockade is an effective treatment for rheumatoid arthritis (RA) and other inflammatory diseases, but in patients, it is associated with reduced resistance to the infectious agents Mycobacterium tuberculosis and Listeria monocytogenes, among others. Our goal was to model infection and arthritis in mice and to compare etanercept, a currently used anti-TNF-α inhibitor, to an anti-TNF-α vaccine. We developed a murine surrogate of the TNF-α kinoid and produced an anti-murine TNF-α vaccine (TNFKi) composed of keyhole limpet hemocyanin conjugated to TNF-α, which resulted in anti-TNF-α antibody production in mice. We also used etanercept (a soluble receptor of TNF commonly used to treat RA) as a control of TNF neutralization. In a mouse model of collagen-induced arthritis, TNFKi protected against inflammation similar to etanercept. In a mouse model of acute L. monocytogenes infection, all TNFKi-treated mice showed cleared bacterial infection and survived, whereas etanercept-treated mice showed large liver granulomas and quickly died. Moreover, TNFKi mice infected with the virulent H37Rv M. tuberculosis showed resistance to infection, in contrast with etanercept-treated mice or controls. Depending on the TNF-α blockade strategy, treating arthritis with a TNF-α inhibitor could result in a different profile of infection suceptibility. Our TNFKi vaccine allowed for a better remaining host defense than did etanercept.
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Affiliation(s)
- Nadia Belmellat
- UMR 1125 INSERM, Bobigny, France.,Sorbonne Paris Cité Université Paris 13, Bobigny, France
| | - Luca Semerano
- UMR 1125 INSERM, Bobigny, France.,Sorbonne Paris Cité Université Paris 13, Bobigny, France.,Service de Rhumatologie, Groupe Hospitalier Avicenne-Jean Verdier-René Muret, APHP, Bobigny, France
| | - Noria Segueni
- INEM UMR7355, CNRS, University of Orléans, Orléans, France
| | - Diane Damotte
- Service de pathologie Hôpitaux Universitaires Paris Centre, APHP, Université Paris Descartes, Paris, France
| | - Patrice Decker
- UMR 1125 INSERM, Bobigny, France.,Sorbonne Paris Cité Université Paris 13, Bobigny, France
| | - Bernhard Ryffel
- INEM UMR7355, CNRS, University of Orléans, Orléans, France.,IDM, University of Cape Town, Cape Town, South Africa
| | | | - Marie-Christophe Boissier
- UMR 1125 INSERM, Bobigny, France.,Sorbonne Paris Cité Université Paris 13, Bobigny, France.,Service de Rhumatologie, Groupe Hospitalier Avicenne-Jean Verdier-René Muret, APHP, Bobigny, France
| | - Eric Assier
- UMR 1125 INSERM, Bobigny, France.,Sorbonne Paris Cité Université Paris 13, Bobigny, France
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Zhang Q, Sun J, Wang Y, He W, Wang L, Zheng Y, Wu J, Zhang Y, Jiang X. Antimycobacterial and Anti-inflammatory Mechanisms of Baicalin via Induced Autophagy in Macrophages Infected with Mycobacterium tuberculosis. Front Microbiol 2017; 8:2142. [PMID: 29163427 PMCID: PMC5673628 DOI: 10.3389/fmicb.2017.02142] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 10/19/2017] [Indexed: 12/22/2022] Open
Abstract
Tuberculosis (TB) remains a leading killer worldwide among infectious diseases and the effective control of TB is still challenging. Autophagy is an intracellular self-digestion process which has been increasingly recognized as a major host immune defense mechanism against intracellular microorganisms like Mycobacterium tuberculosis (Mtb) and serves as a key negative regulator of inflammation. Clinically, chronic inflammation surrounding Mtb can persist for decades leading to lung injury that can remain even after successful treatment. Adjunct host-directed therapy (HDT) based on both antimycobacterial and anti-inflammatory interventions could be exploited to improve treatment efficacy and outcome. Autophagy occurring in the host macrophages represents a logical host target. Here, we show that herbal medicine, baicalin, could induce autophagy in macrophage cell line Raw264.7 and caused increased killing of intracellular Mtb. Further, baicalin inhibited Mtb-induced NLRP3 inflammasome activation and subsequent inflammasome-derived IL-1β. To investigate the molecular mechanisms of baicalin, the signaling pathways associated with autophagy were examined. Results indicated that baicalin decreased the levels of phosphorylated protein kinase B (p-Akt) and phosphorylated mammalian target of rapamycin (p-mTOR) at Ser473 and Ser2448, respectively, but did not alter the phosphorylation of p38, JNK, or ERK both in Raw264.7 and primary peritoneal macrophages. Moreover, baicalin exerted an obvious inhibitory effect on nuclear factor-kappa B (NF-κB) activity. Finally, immunofluorescence studies demonstrated that baicalin promoted the co-localization of inflammasome with autophagosome may serve as the underlying mechanism of autophagic degradative effect on reducing inflammasome activation. Together, baicalin definitely induces the activation of autophagy on the Mtb-infected macrophages through PI3K/Akt/mTOR pathway instead of MAPK pathway. Furthermore, baicalin inhibited the PI3K/Akt/NF-κB signal pathway, and both autophagy induction and NF-κB inhibition contribute to limiting the NLRP3 inflammasome as well as subsequent production of pro-inflammatory cytokine IL-1β. Based on these results, we conclude that baicalin is a promising antimycobacterial and anti-inflammatory agent which can be a novel candidate for the development of new adjunct drugs targeting HDT for possible improved treatment.
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Affiliation(s)
- Qingwen Zhang
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jinxia Sun
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuli Wang
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Weigang He
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lixin Wang
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuejuan Zheng
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jing Wu
- Department of Infectious Diseases, Institute of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Ying Zhang
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Xin Jiang
- Department of Immunology and Microbiology, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Nagalingam G, Vinuesa CG, Britton WJ, Saunders BM. Modulation of Roquin Function in Myeloid Cells Reduces Mycobacterium tuberculosis-Induced Inflammation. THE JOURNAL OF IMMUNOLOGY 2017; 199:1796-1804. [PMID: 28747346 DOI: 10.4049/jimmunol.1602069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 06/30/2017] [Indexed: 12/21/2022]
Abstract
Damaging inflammation is a hallmark of Mycobacterium tuberculosis infection, and understanding how this is regulated is important for the development of new therapies to limit excessive inflammation. The E3 ubiquitin ligase, Roquin, is involved in immune regulation; however, its role in immunity to M. tuberculosis is unknown. To address this, we infected mice with a point mutation in Roquin1/Rc3h1 (sanroque). Aerosol-infected sanroque mice showed enhanced control of M. tuberculosis infection associated with delayed bacterial dissemination and upregulated TNF production in the lungs after 2 wk. However, this early control of infection was not maintained, and by 8 wk postinfection sanroque mice demonstrated an increased bacterial burden and dysregulated inflammation in the lungs. As the inflammation in the lungs of the sanroque mice could have been influenced by emerging autoimmune conditions that are characteristic of the mice aging, the function of Roquin was examined in immune cell subsets in the absence of autoimmune complications. M. bovis bacillus Calmette-Guérin-primed sanroque T cells transferred into Rag1-/- mice provided equivalent protection in the spleen and liver. Interestingly, the transfer of mycobacteria-specific (P25 CD4+ TCR transgenic) wild-type spleen cells into sanroqueRag1-/- mice actually led to enhanced protection with reduced bacterial load, decreased chemokine expression, and reduced inflammation in the lungs compared with transfers into Rag1-/- mice expressing intact Roquin. These studies suggest that modulation of Roquin in myeloid cells may reduce both inflammation and bacterial growth during the chronic phase of M. tuberculosis infection.
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Affiliation(s)
- Gayathri Nagalingam
- Tuberculosis Research Program, Centenary Institute, Newtown, New South Wales 2042, Australia
| | - Carola G Vinuesa
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Warwick J Britton
- Tuberculosis Research Program, Centenary Institute, Newtown, New South Wales 2042, Australia.,Disciplines of Medicine, Infectious Diseases and Immunology, Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia; and
| | - Bernadette M Saunders
- Tuberculosis Research Program, Centenary Institute, Newtown, New South Wales 2042, Australia; .,School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
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Vyas SP, Goswami R. Striking the right immunological balance prevents progression of tuberculosis. Inflamm Res 2017; 66:1031-1056. [PMID: 28711989 DOI: 10.1007/s00011-017-1081-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/03/2017] [Accepted: 07/07/2017] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Tuberculosis (TB) caused by infection with Mycobacterium tuberculosis (Mtb) is a major burden for human health worldwide. Current standard treatments for TB require prolonged administration of antimycobacterial drugs leading to exaggerated inflammation and tissue damage. This can result in the reactivation of latent TB culminating in TB progression. Thus, there is an unmet need to develop therapies that would shorten the duration of anti-TB treatment and to induce optimal protective immune responses to control the spread of mycobacterial infection with minimal lung pathology. FINDINGS Granulomata is the hallmark structure formed by the organized accumulation of immune cells including macrophages, natural killer cells, dendritic cells, neutrophils, T cells, and B cells to the site of Mtb infection. It safeguards the host by containing Mtb in latent form. However, granulomata can undergo caseation and contribute to the reactivation of latent TB, if the immune responses developed to fight mycobacterial infection are not properly controlled. Thus, an optimal balance between innate and adaptive immune cells might play a vital role in containing mycobacteria in latent form for prolonged periods and prevent the spread of Mtb infection from one individual to another. CONCLUSION Optimal and well-regulated immune responses against Mycobacterium tuberculosis may help to prevent the reactivation of latent TB. Moreover, therapies targeting balanced immune responses could help to improve treatment outcomes among latently infected TB patients and thereby limit the dissemination of mycobacterial infection.
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Affiliation(s)
| | - Ritobrata Goswami
- School of Bio Science, IIT Kharagpur, Kharagpur, West Bengal, 721302, India.
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WhiB4 Regulates the PE/PPE Gene Family and is Essential for Virulence of Mycobacterium marinum. Sci Rep 2017; 7:3007. [PMID: 28592799 PMCID: PMC5462746 DOI: 10.1038/s41598-017-03020-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 04/18/2017] [Indexed: 11/18/2022] Open
Abstract
During the course of infection, pathogenic mycobacteria including Mycobacterium tuberculosis (M. tb) encounter host environments of variable oxygen tension, ranging from the hypoxic center of granulomas to the most oxygenated region in the lung cavities. Mycobacterial responses to changes of oxygen tension are critically related to infection outcomes, such as latency and reactivation. WhiB4 is an iron-sulfur containing transcription factor that is highly sensitive to oxygen exposure. In this study, we found that WhiB4 of Mycobacterium marinum (M. marinum), a pathogenic mycobacterial species that is closely related to M. tb, is required for its virulence. M. marinum ΔwhiB4 exhibited defective intracellular replication in macrophages and diminished virulence in zebrafish. Histology analysis revealed that the host had successfully controlled ΔwhiB4 bacteria, forming well-organized granulomas. RNA-seq analysis identified a large number of pe/ppe genes that were regulated by WhiB4, which provides an explanation for the essential role of WhiB4 in M. marinum virulence. Several antioxidant enzymes were also upregulated in ΔwhiB4, supporting its role in modulation of oxidative stress response. Taken together, we have provided new insight into and proposed a model to explain the physiological role of WhiB4.
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MCL Plays an Anti-Inflammatory Role in Mycobacterium tuberculosis-Induced Immune Response by Inhibiting NF- κB and NLRP3 Inflammasome Activation. Mediators Inflamm 2017. [PMID: 28642632 PMCID: PMC5470027 DOI: 10.1155/2017/2432904] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Mycobacterium tuberculosis (Mtb) remains a significant menace to global health as it induces granulomatous lung lesions and systemic inflammatory responses during active tuberculosis (TB). Micheliolide (MCL), a sesquiterpene lactone, was recently reported to have a function of relieving LPS-induced inflammatory response, but the regulative role of MCL on the immunopathology of TB still remains unknown. In this experiment, we examined the inhibitory effect of MCL on Mtb-induced inflammatory response in mouse macrophage-like cell line Raw264.7 by downregulating the activation of nuclear factor kappa B (NF-κB) and NLRP3 inflammasome. Evidences showed that MCL decreased the secretion of Mtb-induced inflammatory cytokines (IL-1β and TNF-α) in a dose-dependent manner. Meanwhile, MCL dramatically suppressed Mtb-induced activation of iNOS and COX2 as well as subsequent production of NO. Furthermore, MCL inhibited Mtb-induced phosphorylation of Akt (Ser 473) in Raw264.7. According to our results, MCL plays an important role in modulating Mtb-induced inflammatory response through PI3K/Akt/NF-κB pathway and subsequently downregulating the activation of NLRP3 inflammasome. Therefore, MCL may represent as a potential drug candidate in the adjuvant treatment of TB by regulating host immune response.
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Leu JS, Chen ML, Chang SY, Yu SL, Lin CW, Wang H, Chen WC, Chang CH, Wang JY, Lee LN, Yu CJ, Kramnik I, Yan BS. SP110b Controls Host Immunity and Susceptibility to Tuberculosis. Am J Respir Crit Care Med 2017; 195:369-382. [PMID: 27858493 PMCID: PMC5328177 DOI: 10.1164/rccm.201601-0103oc] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 08/15/2016] [Indexed: 12/24/2022] Open
Abstract
RATIONALE How host genetic factors affect Mycobacterium tuberculosis (Mtb) infection outcomes remains largely unknown. SP110b, an IFN-induced nuclear protein, is the nearest human homologue to the mouse Ipr1 protein that has been shown to control host innate immunity to Mtb infection. However, the function(s) of SP110b remains unclear. OBJECTIVES To elucidate the role of SP110b in controlling host immunity and susceptibility to tuberculosis (TB), as well as to identify the fundamental immunological and molecular mechanisms affected by SP110b. METHODS Using cell-based approaches and mouse models of Mtb infection, we characterized the function(s) of SP110b/Ipr1. We also performed genetic characterization of patients with TB to investigate the role of SP110 in controlling host susceptibility to TB. MEASUREMENTS AND MAIN RESULTS SP110b modulates nuclear factor-κB (NF-κB) activity, resulting in downregulation of tumor necrosis factor-α (TNF-α) production and concomitant upregulation of NF-κB-induced antiapoptotic gene expression, thereby suppressing IFN-γ-mediated monocyte and/or macrophage cell death. After Mtb infection, TNF-α is also downregulated in Ipr1-expressing mice that have alleviated cell death, less severe necrotic lung lesions, more efficient Mtb growth control in the lungs, and longer survival. Moreover, genetic studies in patients suggest that SP110 plays a key role in modulating TB susceptibility in concert with NFκB1 and TNFα genes. CONCLUSIONS These results indicate that SP110b plays a crucial role in shaping the inflammatory milieu that supports host protection during infection by fine-tuning NF-κB activity, suggesting that SP110b may serve as a potential target for host-directed therapy aimed at manipulating host immunity against TB.
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Affiliation(s)
- Jia-Shiun Leu
- Institute of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan
| | | | - So-Yi Chang
- Institute of Biochemistry and Molecular Biology, and
| | - Sung-Liang Yu
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University Medical College, Taipei, Taiwan
| | - Chia-Wei Lin
- Institute of Biochemistry and Molecular Biology, and
| | - Hsuan Wang
- Institute of Biochemistry and Molecular Biology, and
| | - Wan-Chen Chen
- Institute of Biochemistry and Molecular Biology, and
| | | | | | - Li-Na Lee
- Department of Laboratory Medicine, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan; and
| | | | - Igor Kramnik
- Pulmonary Center, Department of Medicine, National Emerging Infectious Diseases Laboratory, Boston University School of Medicine, Boston, Massachusetts
| | - Bo-Shiun Yan
- Institute of Biochemistry and Molecular Biology, and
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Kim YS, Yang CS, Nguyen LT, Kim JK, Jin HS, Choe JH, Kim SY, Lee HM, Jung M, Kim JM, Kim MH, Jo EK, Jang JC. Mycobacterium abscessus ESX-3 plays an important role in host inflammatory and pathological responses during infection. Microbes Infect 2016; 19:5-17. [PMID: 27637463 DOI: 10.1016/j.micinf.2016.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 08/02/2016] [Accepted: 09/05/2016] [Indexed: 12/20/2022]
Abstract
Mycobacterial ESX systems are often related to pathogenesis during infection. However, little is known about the function of ESX systems of Mycobacterium abscessus (Mab). This study focuses on the Mab ESX-3 cluster, which contains major genes such as esxH (Rv0288, low molecular weight protein antigen 7; CFP-7) and esxG (Rv0287, ESAT-6 like protein). An esx-3 (MAB 2224c-2234c)-deletional mutant of Mab (Δesx) was constructed and used to infect murine and human macrophages. We then investigated whether Mab Δesx modulated innate host immune responses in macrophages. Mab Δesx infection resulted in less pathological and inflammatory responses. Additionally, Δesx resulted in significantly decreased activation of inflammatory signaling and cytokine production in macrophages compared to WT. Moreover, recombinant EsxG·EsxH (rEsxGH) proteins encoded by the ESX-3 region showed synergistic enhancement of inflammatory cytokine generation in macrophages infected with Δesx. Taken together, our data suggest that Mab ESX-3 plays an important role in inflammatory and pathological responses during Mab infection.
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Affiliation(s)
- Yi Sak Kim
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Chul-Su Yang
- Department of Molecular and Life Science, Hanyang University, Ansan 426-791, South Korea
| | - Loi T Nguyen
- Infection and Immunity Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, South Korea
| | - Jin Kyung Kim
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Hyo Sun Jin
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Jin Ho Choe
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Soo Yeon Kim
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Hye-Mi Lee
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Mingyu Jung
- Department of Pathology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Jin-Man Kim
- Department of Pathology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Myung Hee Kim
- Infection and Immunity Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, South Korea
| | - Eun-Kyeong Jo
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea
| | - Ji-Chan Jang
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 301-747, South Korea; Molecular Mechanism of Antibiotics, Division of Life Science, Research Institute of Life Science, Gyeongsang National University, Jinju 660-701, South Korea.
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Matty MA, Roca FJ, Cronan MR, Tobin DM. Adventures within the speckled band: heterogeneity, angiogenesis, and balanced inflammation in the tuberculous granuloma. Immunol Rev 2015; 264:276-87. [PMID: 25703566 DOI: 10.1111/imr.12273] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Recent work in a variety of animal models, including mice, zebrafish, and macaques, as well as in humans, has led to a reassessment of several tenets of mycobacterial infection. In this review, we describe new findings about the composition and dynamics of the tuberculous granuloma, the central host structure in mycobacterial infection, as well as inflammatory mediators that drive a successful anti-microbial response on one hand and pathological inflammation on the other. We highlight granuloma heterogeneity that emerges in the context of infection, the functional consequences of angiogenesis in tuberculous granulomas, and data that balanced inflammation in humans, with a central role for tumor necrosis factor, appears to play a key role in optimal defense against mycobacterial infection. These findings have suggested new and specific host-directed therapies that await further clinical exploration.
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Affiliation(s)
- Molly A Matty
- Department of Molecular Genetics and Microbiology, Center for Host-Microbial Interactions, Duke University Medical Center, Durham, NC, USA; University Program in Genetics and Genomics, Duke University, Durham, NC, USA
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35
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Kiran D, Podell BK, Chambers M, Basaraba RJ. Host-directed therapy targeting the Mycobacterium tuberculosis granuloma: a review. Semin Immunopathol 2015; 38:167-83. [PMID: 26510950 PMCID: PMC4779125 DOI: 10.1007/s00281-015-0537-x] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 10/13/2015] [Indexed: 12/16/2022]
Abstract
Infection by the intracellular bacterial pathogen Mycobacterium tuberculosis (Mtb) is a major cause of morbidity and mortality worldwide. Slow progress has been made in lessening the impact of tuberculosis (TB) on human health, especially in parts of the world where Mtb is endemic. Due to the complexity of TB disease, there is still an urgent need to improve diagnosis, prevention, and treatment strategies to control global spread of disease. Active research targeting avenues to prevent infection or transmission through vaccination, to diagnose asymptomatic carriers of Mtb, and to improve antimicrobial drug treatment responses is ongoing. However, this research is hampered by a relatively poor understanding of the pathogenesis of early infection and the factors that contribute to host susceptibility, protection, and the development of active disease. There is increasing interest in the development of adjunctive therapy that will aid the host in responding to Mtb infection appropriately thereby improving the effectiveness of current and future drug treatments. In this review, we summarize what is known about the host response to Mtb infection in humans and animal models and highlight potential therapeutic targets involved in TB granuloma formation and resolution. Strategies designed to shift the balance of TB granuloma formation toward protective rather than destructive processes are discussed based on our current knowledge. These therapeutic strategies are based on the assumption that granuloma formation, although thought to prevent the spread of the tubercle bacillus within and between individuals contributes to manifestations of active TB disease in human patients when left unchecked. This effect of granuloma formation favors the spread of infection and impairs antimicrobial drug treatment. By gaining a better understanding of the mechanisms by which Mtb infection contributes to irreversible tissue damage, down regulates protective immune responses, and delays tissue healing, new treatment strategies can be rationally designed. Granuloma-targeted therapy is advantageous because it allows for the repurpose of existing drugs used to treat other communicable and non-communicable diseases as adjunctive therapies combined with existing and future anti-TB drugs. Thus, the development of adjunctive, granuloma-targeted therapy, like other host-directed therapies, may benefit from the availability of approved drugs to aid in treatment and prevention of TB. In this review, we have attempted to summarize the results of published studies in the context of new innovative approaches to host-directed therapy that need to be more thoroughly explored in pre-clinical animal studies and in human clinical trials.
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Affiliation(s)
- Dilara Kiran
- Department of Microbiology, Immunology and Pathology, Metabolism of Infectious Diseases Laboratory and Mycobacteria Research Laboratories, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 200 West Lake Street, 1619 Campus Delivery, Fort Collins, CO, 80523-1619, USA
| | - Brendan K Podell
- Department of Microbiology, Immunology and Pathology, Metabolism of Infectious Diseases Laboratory and Mycobacteria Research Laboratories, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 200 West Lake Street, 1619 Campus Delivery, Fort Collins, CO, 80523-1619, USA
| | - Mark Chambers
- Department of Bacteriology, Animal and Plant Health Agency (APHA), Woodham Lane, New Haw, Addlestone, Surrey, KT15 3NB, UK.,School of Veterinary Medicine Faculty of Health and Medical Sciences, University of Surrey, Vet School Main Building, Daphne Jackson Road, Guildford, GU2 7AL, UK
| | - Randall J Basaraba
- Department of Microbiology, Immunology and Pathology, Metabolism of Infectious Diseases Laboratory and Mycobacteria Research Laboratories, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 200 West Lake Street, 1619 Campus Delivery, Fort Collins, CO, 80523-1619, USA.
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36
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Pathology and immune reactivity: understanding multidimensionality in pulmonary tuberculosis. Semin Immunopathol 2015; 38:153-66. [PMID: 26438324 DOI: 10.1007/s00281-015-0531-3] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 09/13/2015] [Indexed: 12/19/2022]
Abstract
Heightened morbidity and mortality in pulmonary tuberculosis (TB) are consequences of complex disease processes triggered by the causative agent, Mycobacterium tuberculosis (Mtb). Mtb modulates inflammation at distinct stages of its intracellular life. Recognition and phagocytosis, replication in phagosomes and cytosol escape induce tightly regulated release of cytokines [including interleukin (IL)-1, tumor necrosis factor (TNF), IL-10], chemokines, lipid mediators, and type I interferons (IFN-I). Mtb occupies various lung lesions at sites of pathology. Bacteria are barely detectable at foci of lipid pneumonia or in perivascular/bronchiolar cuffs. However, abundant organisms are evident in caseating granulomas and at the cavity wall. Such lesions follow polar trajectories towards fibrosis, encapsulation and mineralization or liquefaction, extensive matrix destruction, and tissue injury. The outcome is determined by immune factors acting in concert. Gradients of cytokines and chemokines (CCR2, CXCR2, CXCR3/CXCR5 agonists; TNF/IL-10, IL-1/IFN-I), expression of activation/death markers on immune cells (TNF receptor 1, PD-1, IL-27 receptor) or abundance of enzymes [arginase-1, matrix metalloprotease (MMP)-1, MMP-8, MMP-9] drive genesis and progression of lesions. Distinct lesions coexist such that inflammation in TB encompasses a spectrum of tissue changes. A better understanding of the multidimensionality of immunopathology in TB will inform novel therapies against this pulmonary disease.
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37
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Niazi MKK, Dhulekar N, Schmidt D, Major S, Cooper R, Abeijon C, Gatti DM, Kramnik I, Yener B, Gurcan M, Beamer G. Lung necrosis and neutrophils reflect common pathways of susceptibility to Mycobacterium tuberculosis in genetically diverse, immune-competent mice. Dis Model Mech 2015. [PMID: 26204894 PMCID: PMC4582107 DOI: 10.1242/dmm.020867] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pulmonary tuberculosis (TB) is caused by Mycobacterium tuberculosis in susceptible humans. Here, we infected Diversity Outbred (DO) mice with ∼100 bacilli by aerosol to model responses in a highly heterogeneous population. Following infection, ‘supersusceptible’, ‘susceptible’ and ‘resistant’ phenotypes emerged. TB disease (reduced survival, weight loss, high bacterial load) correlated strongly with neutrophils, neutrophil chemokines, tumor necrosis factor (TNF) and cell death. By contrast, immune cytokines were weak correlates of disease. We next applied statistical and machine learning approaches to our dataset of cytokines and chemokines from lungs and blood. Six molecules from the lung: TNF, CXCL1, CXCL2, CXCL5, interferon-γ (IFN-γ), interleukin 12 (IL-12); and two molecules from blood – IL-2 and TNF – were identified as being important by applying both statistical and machine learning methods. Using molecular features to generate tree classifiers, CXCL1, CXCL2 and CXCL5 distinguished four classes (supersusceptible, susceptible, resistant and non-infected) from each other with approximately 77% accuracy using completely independent experimental data. By contrast, models based on other molecules were less accurate. Low to no IFN-γ, IL-12, IL-2 and IL-10 successfully discriminated non-infected mice from infected mice but failed to discriminate disease status amongst supersusceptible, susceptible and resistant M.-tuberculosis-infected DO mice. Additional analyses identified CXCL1 as a promising peripheral biomarker of disease and of CXCL1 production in the lungs. From these results, we conclude that: (1) DO mice respond variably to M. tuberculosis infection and will be useful to identify pathways involving necrosis and neutrophils; (2) data from DO mice is suited for machine learning methods to build, validate and test models with independent data based solely on molecular biomarkers; (3) low levels of immunological cytokines best indicate a lack of exposure to M. tuberculosis but cannot distinguish infection from disease. Summary: Molecular biomarkers of tuberculosis are identified and used to classify disease status of Diversity Outbred mice that have been infected with Mycobacterium tuberculosis.
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Affiliation(s)
- Muhammad K K Niazi
- Department of Biomedical Informatics, The Ohio State University, Columbus, 43210 OH, USA
| | - Nimit Dhulekar
- Department of Computer Science and Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute, Troy, 12810 NY, USA
| | - Diane Schmidt
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, Grafton, 01536 MA, USA
| | - Samuel Major
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, Grafton, 01536 MA, USA
| | - Rachel Cooper
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, Grafton, 01536 MA, USA
| | - Claudia Abeijon
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, Grafton, 01536 MA, USA
| | | | - Igor Kramnik
- Department of Medicine, Boston University School of Medicine, Boston, 02215 MA, USA
| | - Bulent Yener
- Department of Computer Science and Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute, Troy, 12810 NY, USA
| | - Metin Gurcan
- Department of Biomedical Informatics, The Ohio State University, Columbus, 43210 OH, USA
| | - Gillian Beamer
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, Grafton, 01536 MA, USA
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38
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Ahmed A, Das A, Mukhopadhyay S. Immunoregulatory functions and expression patterns of PE/PPE family members: Roles in pathogenicity and impact on anti-tuberculosis vaccine and drug design. IUBMB Life 2015; 67:414-27. [DOI: 10.1002/iub.1387] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 04/29/2015] [Indexed: 01/27/2023]
Affiliation(s)
- Asma Ahmed
- Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD); Hyderabad, Telengana India
| | - Arghya Das
- Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD); Hyderabad, Telengana India
- Manipal University; Manipal Karnataka India
| | - Sangita Mukhopadhyay
- Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD); Hyderabad, Telengana India
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CpsA, a LytR-CpsA-Psr Family Protein in Mycobacterium marinum, Is Required for Cell Wall Integrity and Virulence. Infect Immun 2015; 83:2844-54. [PMID: 25939506 DOI: 10.1128/iai.03081-14] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/20/2015] [Indexed: 12/28/2022] Open
Abstract
LytR-CpsA-Psr family proteins play an important role in bacterial cell wall integrity. Although the pathogenic relevance of LytR-CpsA-Psr family proteins has been studied in a few bacterial pathogens, their function in mycobacteria remains uncharacterized. In this work, a transposon insertion mutant (cpsA::Tn) of Mycobacterium marinum was studied. We found that inactivation of CpsA altered bacterial colony morphology, sliding motility, cell surface hydrophobicity, and cell wall permeability. Besides, the cpsA mutant exhibited a decreased arabinogalactan content, indicating that CpsA plays a role in cell wall assembly. Moreover, the mutant shows impaired growth within macrophage cell lines and is severely attenuated in zebrafish larvae and adult zebrafish. Taken together, our results indicated that CpsA, a previously uncharacterized protein, is important for mycobacterial cell wall integrity and is required for mycobacterial virulence.
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40
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Yang D, Kong Y. The bacterial and host factors associated with extrapulmonary dissemination of Mycobacterium tuberculosis. ACTA ACUST UNITED AC 2015; 10:252-261. [PMID: 26557138 DOI: 10.1007/s11515-015-1358-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
With high morbidity and mortality worldwide, tuberculosis (TB) is still an important public health threat. The majority of human TB cases are caused by Mycobacterium tuberculosis. Although pulmonary TB is the most common presentation, M. tuberculosis can disseminate into other organs and causes extrapulmonary TB (EPTB). The dissemination of bacteria from the initial site of infection to other organs can lead to fatal diseases, such as miliary and meningeal TB. Thoroughly understanding the mechanisms and pathways of dissemination would develop therapies to prevent the lethal prognosis of EPTB (miliary and meningeal TB) and vaccines to promote the development of adaptive immunity. This review focuses on risk factors of EPTB, bacterial and host genes involved in EPTB, and potential mechanisms of M. tuberculosis extrapulmonary dissemination.
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Affiliation(s)
- Dong Yang
- The Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Ying Kong
- The Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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41
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Latent tuberculosis infection: myths, models, and molecular mechanisms. Microbiol Mol Biol Rev 2015; 78:343-71. [PMID: 25184558 DOI: 10.1128/mmbr.00010-14] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The aim of this review is to present the current state of knowledge on human latent tuberculosis infection (LTBI) based on clinical studies and observations, as well as experimental in vitro and animal models. Several key terms are defined, including "latency," "persistence," "dormancy," and "antibiotic tolerance." Dogmas prevalent in the field are critically examined based on available clinical and experimental data, including the long-held beliefs that infection is either latent or active, that LTBI represents a small population of nonreplicating, "dormant" bacilli, and that caseous granulomas are the haven for LTBI. The role of host factors, such as CD4(+) and CD8(+) T cells, T regulatory cells, tumor necrosis factor alpha (TNF-α), and gamma interferon (IFN-γ), in controlling TB infection is discussed. We also highlight microbial regulatory and metabolic pathways implicated in bacillary growth restriction and antibiotic tolerance under various physiologically relevant conditions. Finally, we pose several clinically important questions, which remain unanswered and will serve to stimulate future research on LTBI.
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42
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Nold-Petry CA, Lo CY, Rudloff I, Elgass KD, Li S, Gantier MP, Lotz-Havla AS, Gersting SW, Cho SX, Lao JC, Ellisdon AM, Rotter B, Azam T, Mangan NE, Rossello FJ, Whisstock JC, Bufler P, Garlanda C, Mantovani A, Dinarello CA, Nold MF. IL-37 requires the receptors IL-18Rα and IL-1R8 (SIGIRR) to carry out its multifaceted anti-inflammatory program upon innate signal transduction. Nat Immunol 2015; 16:354-65. [PMID: 25729923 DOI: 10.1038/ni.3103] [Citation(s) in RCA: 314] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 01/12/2015] [Indexed: 12/12/2022]
Abstract
Interleukin 37 (IL-37) and IL-1R8 (SIGIRR or TIR8) are anti-inflammatory orphan members of the IL-1 ligand family and IL-1 receptor family, respectively. Here we demonstrate formation and function of the endogenous ligand-receptor complex IL-37-IL-1R8-IL-18Rα. The tripartite complex assembled rapidly on the surface of peripheral blood mononuclear cells upon stimulation with lipopolysaccharide. Silencing of IL-1R8 or IL-18Rα impaired the anti-inflammatory activity of IL-37. Whereas mice with transgenic expression of IL-37 (IL-37tg mice) with intact IL-1R8 were protected from endotoxemia, IL-1R8-deficient IL-37tg mice were not. Proteomic and transcriptomic investigations revealed that IL-37 used IL-1R8 to harness the anti-inflammatory properties of the signaling molecules Mer, PTEN, STAT3 and p62(dok) and to inhibit the kinases Fyn and TAK1 and the transcription factor NF-κB, as well as mitogen-activated protein kinases. Furthermore, IL-37-IL-1R8 exerted a pseudo-starvational effect on the metabolic checkpoint kinase mTOR. IL-37 thus bound to IL-18Rα and exploited IL-1R8 to activate a multifaceted intracellular anti-inflammatory program.
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Affiliation(s)
- Claudia A Nold-Petry
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | - Camden Y Lo
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Monash Micro Imaging, Monash University, Melbourne, Australia
| | - Ina Rudloff
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | | | - Suzhao Li
- Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA
| | - Michael P Gantier
- 1] Centre for Cancer Research, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Molecular and Translational Science, Monash University, Melbourne, Australia
| | | | - Søren W Gersting
- Molecular Pediatrics, Ludwig-Maximilians University, Munich, Germany
| | - Steven X Cho
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | - Jason C Lao
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | - Andrew M Ellisdon
- 1] Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Australia. [2] Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Melbourne, Australia
| | | | - Tania Azam
- Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA
| | - Niamh E Mangan
- 1] Department of Molecular and Translational Science, Monash University, Melbourne, Australia. [2] Centre for Innate Immunity and Infectious Diseases, MIMR-PHI Institute of Medical Research, Melbourne, Australia
| | - Fernando J Rossello
- Victorian Bioinformatics Consortium, Monash University, Melbourne, Australia
| | - James C Whisstock
- 1] Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Australia. [2] Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Melbourne, Australia
| | - Philip Bufler
- Department of Pediatrics, Dr. von Hauner Children's Hospital, Ludwig-Maximilians University, Munich, Germany
| | | | - Alberto Mantovani
- 1] Humanitas Clinical and Research Center, Rozzano, Italy. [2] Humanitas University, Rozzano, Italy
| | - Charles A Dinarello
- 1] Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA. [2] Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Marcel F Nold
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia. [3] Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA
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43
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Macrophage polarization drives granuloma outcome during Mycobacterium tuberculosis infection. Infect Immun 2014; 83:324-38. [PMID: 25368116 DOI: 10.1128/iai.02494-14] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), induces formation of granulomas, structures in which immune cells and bacteria colocalize. Macrophages are among the most abundant cell types in granulomas and have been shown to serve as both critical bactericidal cells and targets for M. tuberculosis infection and proliferation throughout the course of infection. Very little is known about how these processes are regulated, what controls macrophage microenvironment-specific polarization and plasticity, or why some granulomas control bacteria and others permit bacterial dissemination. We take a computational-biology approach to investigate mechanisms that drive macrophage polarization, function, and bacterial control in granulomas. We define a "macrophage polarization ratio" as a metric to understand how cytokine signaling translates into polarization of single macrophages in a granuloma, which in turn modulates cellular functions, including antimicrobial activity and cytokine production. Ultimately, we extend this macrophage ratio to the tissue scale and define a "granuloma polarization ratio" describing mean polarization measures for entire granulomas. Here we coupled experimental data from nonhuman primate TB granulomas to our computational model, and we predict two novel and testable hypotheses regarding macrophage profiles in TB outcomes. First, the temporal dynamics of granuloma polarization ratios are predictive of granuloma outcome. Second, stable necrotic granulomas with low CFU counts and limited inflammation are characterized by short NF-κB signal activation intervals. These results suggest that the dynamics of NF-κB signaling is a viable therapeutic target to promote M1 polarization early during infection and to improve outcome.
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Schmidt SV, Schultze JL. New Insights into IDO Biology in Bacterial and Viral Infections. Front Immunol 2014; 5:384. [PMID: 25157255 PMCID: PMC4128074 DOI: 10.3389/fimmu.2014.00384] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 07/28/2014] [Indexed: 12/24/2022] Open
Abstract
Initially, indoleamine-2,3-dioxygenase (IDO) has been introduced as a bactericidal effector mechanism and has been linked to T-cell immunosuppression and tolerance. In recent years, evidence has been accumulated that IDO also plays an important role during viral infections including HIV, influenza, and hepatitis B and C. Moreover, novel aspects about the role of IDO in bacterial infections and sepsis have been revealed. Here, we review these recent findings highlighting the central role of IDO and tryptophan metabolism in many major human infections. Moreover, we also shed light on issues concerning human-specific and mouse-specific host–pathogen interactions that need to be considered when studying the biology of IDO in the context of infections.
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Affiliation(s)
- Susanne V Schmidt
- Genomics and Immunoregulation, LIMES-Institute, University of Bonn , Bonn , Germany
| | - Joachim L Schultze
- Genomics and Immunoregulation, LIMES-Institute, University of Bonn , Bonn , Germany
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45
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Pasricha R, Saini NK, Rathor N, Pathak R, Sinha R, Varma-Basil M, Mishra K, Brahmachari V, Bose M. The Mycobacterium tuberculosis recombinant LprN protein of mce4 operon induces Th-1 type response deleterious to protection in mice. Pathog Dis 2014; 72:188-96. [PMID: 24989028 DOI: 10.1111/2049-632x.12200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 06/20/2014] [Accepted: 06/20/2014] [Indexed: 11/30/2022] Open
Abstract
Lipoproteins are known to be effective immunogens and affect both innate and adaptive immunity. The lprN gene of Mycobacterium tuberculosis has been predicted to encode for a putative lipoprotein in silico. Here, we studied its function as an immunogen by in vivo studies in mice. The recombinant LprN protein, expressed and purified in Escherichia coli, triggered a cell-mediated immune response in BALB/c mice. This was observed by significantly higher T-cell proliferation and increased production of TNF-α and IFN-γ cytokines. However, pre-exposure to LprN protein failed to provide protection in mice after challenge with a virulent strain of M. tuberculosis. Histological examination showed an increase in tissue destruction in experimental animals, indicating an immunogenic potential for LprN protein that enhanced the virulence of bacilli.
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Affiliation(s)
- Rashmi Pasricha
- Department of Microbiology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
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46
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Dorhoi A, Kaufmann SH. Tumor necrosis factor alpha in mycobacterial infection. Semin Immunol 2014; 26:203-9. [DOI: 10.1016/j.smim.2014.04.003] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 04/09/2014] [Indexed: 12/31/2022]
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47
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Surface layer proteins isolated from Clostridium difficile induce clearance responses in macrophages. Microbes Infect 2014; 16:391-400. [DOI: 10.1016/j.micinf.2014.02.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/20/2013] [Accepted: 02/09/2014] [Indexed: 12/18/2022]
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48
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Tientcheu LD, Sutherland JS, de Jong BC, Kampmann B, Jafali J, Adetifa IM, Antonio M, Dockrell HM, Ota MO. Differences in T-cell responses between Mycobacterium tuberculosis and Mycobacterium africanum-infected patients. Eur J Immunol 2014; 44:1387-98. [PMID: 24481948 DOI: 10.1002/eji.201343956] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 12/10/2013] [Accepted: 01/27/2014] [Indexed: 11/07/2022]
Abstract
In The Gambia, Mycobacterium tuberculosis (Mtb) and Mycobacterium africanum (Maf) are major causes of tuberculosis (TB). Maf is more likely to cause TB in immune suppressed individuals, implying differences in virulence. Despite this, few studies have assessed the underlying immunity to the two pathogens in human. In this study, we analyzed T-cell responses from 19 Maf- and 29 Mtb-infected HIV-negative patients before and after TB chemotherapy following overnight stimulation of whole blood with TB-specific antigens. Before treatment, percentages of early secreted antigenic target-6(ESAT-6)/culture filtrate protein-10(CFP-10) and purified protein derivative-specific single-TNF-α-producing CD4(+) and CD8(+) T cells were significantly higher while single-IL-2-producing T cells were significantly lower in Maf- compared with Mtb-infected patients. Purified protein derivative-specific polyfunctional CD4(+) T cells frequencies were significantly higher before than after treatment, but there was no difference between the groups at both time points. Furthermore, the proportion of CD3(+) CD11b(+) T cells was similar in both groups pretreatment, but was significantly lower with higher TNF-α, IL-2, and IFN-γ production in Mtb- compared with that of Maf-infected patients posttreatment. Our data provide evidence of differences in T-cell responses to two mycobacterial strains with differing virulence, providing some insight into TB pathogenesis with different Mtb strains that could be prospectively explored as biomarkers for TB protection or susceptibility.
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Affiliation(s)
- Leopold D Tientcheu
- Vaccinology Theme, Medical Research Council Unit, The Gambia; Department of Immunology and Infection, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
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49
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Allie N, Grivennikov SI, Keeton R, Hsu NJ, Bourigault ML, Court N, Fremond C, Yeremeev V, Shebzukhov Y, Ryffel B, Nedospasov SA, Quesniaux VFJ, Jacobs M. Prominent role for T cell-derived tumour necrosis factor for sustained control of Mycobacterium tuberculosis infection. Sci Rep 2013; 3:1809. [PMID: 23657146 PMCID: PMC3648802 DOI: 10.1038/srep01809] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 04/19/2013] [Indexed: 01/13/2023] Open
Abstract
Tumour Necrosis Factor (TNF) is critical for host control of M. tuberculosis, but the relative contribution of TNF from innate and adaptive immune responses during tuberculosis infection is unclear. Myeloid versus T-cell-derived TNF function in tuberculosis was investigated using cell type-specific TNF deletion. Mice deficient for TNF expression in macrophages/neutrophils displayed early, transient susceptibility to M. tuberculosis but recruited activated, TNF-producing CD4+ and CD8+ T-cells and controlled chronic infection. Strikingly, deficient TNF expression in T-cells resulted in early control but susceptibility and eventual mortality during chronic infection with increased pulmonary pathology. TNF inactivation in both myeloid and T-cells rendered mice critically susceptible to infection with a phenotype resembling complete TNF deficient mice, indicating that myeloid and T-cells are the primary TNF sources collaborating for host control of tuberculosis. Thus, while TNF from myeloid cells mediates early immune function, T-cell derived TNF is essential to sustain protection during chronic tuberculosis infection.
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Affiliation(s)
- Nasiema Allie
- Division of Immunology, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
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50
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Comparison of Genetic Polymorphisms of TNF-α and IL-10 Genes Between Tuberculosis Patients and Healthy Blood Donors. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2013. [DOI: 10.5812/archcid.18270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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