1
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Kotov DI, Lee OV, Fattinger SA, Langner CA, Guillen JV, Peters JM, Moon A, Burd EM, Witt KC, Stetson DB, Jaye DL, Bryson BD, Vance RE. Early cellular mechanisms of type I interferon-driven susceptibility to tuberculosis. Cell 2023; 186:5536-5553.e22. [PMID: 38029747 PMCID: PMC10757650 DOI: 10.1016/j.cell.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 06/16/2023] [Accepted: 11/01/2023] [Indexed: 12/01/2023]
Abstract
Mycobacterium tuberculosis (Mtb) causes 1.6 million deaths annually. Active tuberculosis correlates with a neutrophil-driven type I interferon (IFN) signature, but the cellular mechanisms underlying tuberculosis pathogenesis remain poorly understood. We found that interstitial macrophages (IMs) and plasmacytoid dendritic cells (pDCs) are dominant producers of type I IFN during Mtb infection in mice and non-human primates, and pDCs localize near human Mtb granulomas. Depletion of pDCs reduces Mtb burdens, implicating pDCs in tuberculosis pathogenesis. During IFN-driven disease, we observe abundant DNA-containing neutrophil extracellular traps (NETs) described to activate pDCs. Cell-type-specific disruption of the type I IFN receptor suggests that IFNs act on IMs to inhibit Mtb control. Single-cell RNA sequencing (scRNA-seq) indicates that type I IFN-responsive cells are defective in their response to IFNγ, a cytokine critical for Mtb control. We propose that pDC-derived type I IFNs act on IMs to permit bacterial replication, driving further neutrophil recruitment and active tuberculosis disease.
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Affiliation(s)
- Dmitri I Kotov
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA; Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA.
| | - Ophelia V Lee
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Stefan A Fattinger
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Charlotte A Langner
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Jaresley V Guillen
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Joshua M Peters
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Ragon Institute of Mass General, MIT, and Harvard, Cambridge, MA 02139, USA
| | - Andres Moon
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA 30322, USA
| | - Eileen M Burd
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA 30322, USA
| | - Kristen C Witt
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Daniel B Stetson
- Department of Immunology, University of Washington, Seattle, WA 98195, USA
| | - David L Jaye
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA 30322, USA
| | - Bryan D Bryson
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Ragon Institute of Mass General, MIT, and Harvard, Cambridge, MA 02139, USA
| | - Russell E Vance
- Division of Immunology and Molecular Medicine, University of California, Berkeley, Berkeley, CA 94720, USA; Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA.
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2
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Champagne-Jorgensen K, Luong T, Darby T, Roach DR. Immunogenicity of bacteriophages. Trends Microbiol 2023; 31:1058-1071. [PMID: 37198061 DOI: 10.1016/j.tim.2023.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/17/2023] [Accepted: 04/24/2023] [Indexed: 05/19/2023]
Abstract
Hundreds of trillions of diverse bacteriophages (phages) peacefully thrive within and on the human body. However, whether and how phages influence their mammalian hosts is poorly understood. In this review, we explore current knowledge and present growing evidence that direct interactions between phages and mammalian cells often induce host inflammatory and antiviral immune responses. We show evidence that, like viruses of the eukaryotic host, phages are actively internalized by host cells and activate conserved viral detection receptors. This interaction often generates proinflammatory cytokine secretion and recruitment of adaptive immune programs. However, significant variability exists in phage-immune interactions, suggesting an important role for structural phage characteristics. The factors leading to the differential immunogenicity of phages remain largely unknown but are highly influenced by their human and bacterial hosts.
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Affiliation(s)
- Kevin Champagne-Jorgensen
- Department of Biology, San Diego State University, San Diego, CA 92182, USA; Viral Information Institute, San Diego State University, San Diego, CA 92182, USA
| | - Tiffany Luong
- Department of Biology, San Diego State University, San Diego, CA 92182, USA; Viral Information Institute, San Diego State University, San Diego, CA 92182, USA
| | - Taylor Darby
- Department of Biology, San Diego State University, San Diego, CA 92182, USA; Viral Information Institute, San Diego State University, San Diego, CA 92182, USA
| | - Dwayne R Roach
- Department of Biology, San Diego State University, San Diego, CA 92182, USA; Viral Information Institute, San Diego State University, San Diego, CA 92182, USA.
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3
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Cho J, Alexander KL, Ferrell JL, Johnson LA, Estus S, D’Orazio SEF. Apolipoprotein E genotype affects innate susceptibility to Listeria monocytogenes infection in aged male mice. Infect Immun 2023; 91:e0025123. [PMID: 37594272 PMCID: PMC10501219 DOI: 10.1128/iai.00251-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 08/19/2023] Open
Abstract
Apolipoprotein E (ApoE) is a lipid transport protein that is hypothesized to suppress proinflammatory cytokine production, particularly after stimulation with Toll-like receptor (TLR) ligands such as lipopolysaccharide (LPS). Studies using transgenic ApoE human replacement mice (APOE) expressing one of three different allelic variants suggest that there is a hierarchy in terms of responsiveness to proinflammatory stimuli such as APOE4/E4 > APOE3/E3 > APOE2/E2. In this study, we test the hypothesis that APOE genotype can also predict susceptibility to infection with the facultative intracellular gram-positive bacterium Listeria monocytogenes. We found that bone-marrow-derived macrophages isolated from aged APOE4/E4 mice expressed elevated levels of nitric oxide synthase 2 and were highly resistant to in vitro infection with L. monocytogenes compared to APOE3/E3 and APOE2/E2 mice. However, we did not find statistically significant differences in cytokine or chemokine output from either macrophages or whole splenocytes isolated from APOE2/E2, APOE3/E3, or APOE4/E4 mice following L. monocytogenes infection. In vivo, overall susceptibility to foodborne listeriosis also did not differ by APOE genotype in either young (2 mo old) or aged (15 mo old) C57BL/6 mice. However, we observed a sex-dependent susceptibility to infection in aged APOE2/E2 male mice and a sex-dependent resistance to infection in aged APOE4/E4 male mice that was not present in female mice. Thus, these results suggest that APOE genotype does not play an important role in innate resistance to infection with L. monocytogenes but may be linked to sex-dependent changes that occur during immune senescence.
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Affiliation(s)
- Jooyoung Cho
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Katie L. Alexander
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Jessica L. Ferrell
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Lance A. Johnson
- Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
- Sanders Brown Center on Aging, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Steven Estus
- Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky, USA
- Sanders Brown Center on Aging, University of Kentucky College of Medicine, Lexington, Kentucky, USA
| | - Sarah E. F. D’Orazio
- Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky, USA
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4
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Camacho V, Kuznetsova V, Welner RS. Inflammatory Cytokines Shape an Altered Immune Response During Myeloid Malignancies. Front Immunol 2021; 12:772408. [PMID: 34804065 PMCID: PMC8595317 DOI: 10.3389/fimmu.2021.772408] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/19/2021] [Indexed: 12/14/2022] Open
Abstract
The immune microenvironment is a critical driver and regulator of leukemic progression and hematological disease. Recent investigations have demonstrated that multiple immune components play a central role in regulating hematopoiesis, and dysfunction at the immune cell level significantly contributes to neoplastic disease. Immune cells are acutely sensitive to remodeling by leukemic inflammatory cytokine exposure. Importantly, immune cells are the principal cytokine producers in the hematopoietic system, representing an untapped frontier for clinical interventions. Due to a proinflammatory cytokine environment, dysregulation of immune cell states is a hallmark of hematological disease and neoplasia. Malignant immune adaptations have profound effects on leukemic blast proliferation, disease propagation, and drug-resistance. Conversely, targeting the immune landscape to restore hematopoietic function and limit leukemic expansion may have significant therapeutic value. Despite the fundamental role of the immune microenvironment during the initiation, progression, and treatment response of hematological disease, a detailed examination of how leukemic cytokines alter immune cells to permit, promote, or inhibit leukemia growth is lacking. Here we outline an immune-based model of leukemic transformation and highlight how the profound effect of immune alterations on the trajectory of malignancy. The focus of this review is to summarize current knowledge about the impacts of pro- and anti-inflammatory cytokines on immune cells subsets, their modes of action, and immunotherapeutic approaches with the potential to improve clinical outcomes for patients suffering from hematological myeloid malignancies.
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Affiliation(s)
- Virginia Camacho
- Department of Medicine, Division of Hematology/Oncology, O'Neal Comprehensive Cancer Center at the University of Alabama at Birmingham, Birmingham, AL, United States
| | - Valeriya Kuznetsova
- Department of Medicine, Division of Hematology/Oncology, O'Neal Comprehensive Cancer Center at the University of Alabama at Birmingham, Birmingham, AL, United States
| | - Robert S Welner
- Department of Medicine, Division of Hematology/Oncology, O'Neal Comprehensive Cancer Center at the University of Alabama at Birmingham, Birmingham, AL, United States
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5
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Alarcon PC, Damen MS, Madan R, Deepe GS, Spearman P, Way SS, Divanovic S. Adipocyte inflammation and pathogenesis of viral pneumonias: an overlooked contribution. Mucosal Immunol 2021; 14:1224-1234. [PMID: 33958704 PMCID: PMC8100369 DOI: 10.1038/s41385-021-00404-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/18/2021] [Accepted: 03/27/2021] [Indexed: 02/06/2023]
Abstract
Epidemiological evidence establishes obesity as an independent risk factor for increased susceptibility and severity to viral respiratory pneumonias associated with H1N1 influenza and SARS-CoV-2 pandemics. Given the global obesity prevalence, a better understanding of the mechanisms behind obese susceptibility to infection is imperative. Altered immune cell metabolism and function are often perceived as a key causative factor of dysregulated inflammation. However, the contribution of adipocytes, the dominantly altered cell type in obesity with broad inflammatory properties, to infectious disease pathogenesis remains largely ignored. Thus, skewing of adipocyte-intrinsic cellular metabolism may lead to the development of pathogenic inflammatory adipocytes, which shape the overall immune responses by contributing to either premature immunosenescence, delayed hyperinflammation, or cytokine storm in infections. In this review, we discuss the underappreciated contribution of adipocyte cellular metabolism and adipocyte-produced mediators on immune system modulation and how such interplay may modify disease susceptibility and pathogenesis of influenza and SARS-CoV-2 infections in obese individuals.
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Affiliation(s)
- Pablo C. Alarcon
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA,Divisions of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, U,Medical Scientist Training Program, Cincinnati, OH, USA,Immunology Graduate Program Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Michelle S.M.A. Damen
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA,Divisions of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, U
| | - Rajat Madan
- Division of Infectious Diseases, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA,Veterans Affairs Medical Center, Cincinnati, OH, USA
| | - George S. Deepe
- Division of Infectious Diseases, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Paul Spearman
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA,Divisions of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Sing Sing Way
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA,Divisions of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA,Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Senad Divanovic
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA. .,Divisions of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. .,Medical Scientist Training Program, Cincinnati, OH, USA. .,Immunology Graduate Program Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH, USA. .,Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
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6
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Palasiewicz K, Umar S, Romay B, Zomorrodi RK, Shahrara S. Tofacitinib therapy intercepts macrophage metabolic reprogramming instigated by SARS-CoV-2 Spike protein. Eur J Immunol 2021; 51:2330-2340. [PMID: 34107055 PMCID: PMC8237023 DOI: 10.1002/eji.202049159] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/14/2021] [Accepted: 06/07/2021] [Indexed: 12/27/2022]
Abstract
The molecular mechanism of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Spike protein was characterized to identify novel therapies. The impact of tofacitinib, IL-6R Ab, or TNFi therapy was determined on Spike protein or LPS/IFN-γ-induced signaling, inflammation, and metabolic reprogramming in MΦs and/or rheumatoid arthritis (RA) fibroblast-like synoviocyte (FLS). ACE2 frequency was markedly expanded in MΦs compared to T cells and RA FLS. Tofacitinib suppresses Spike protein potentiated STAT1 signaling, whereas this function was unchanged by TNFi. Tofacitinib impairs IL-6/IFN/LPS-induced STAT1 and STAT3 phosphorylation in RA MΦs and FLS. Interestingly, tofacitinib had a broader inhibitory effect on the monokines, glycolytic regulators, or oxidative metabolites compared to IL-6R Ab and TNFi in Spike-protein-activated MΦs. In contrast, all three therapies disrupted IFN-α and IFN-β secretion in response to Spike protein; nonetheless, the IFN-γ was only curtailed by tofacitinib or IL-6R Ab. While tofacitinib counteracted MΦ metabolic rewiring instigated by Spike protein, it was inconsequential on the glycolysis expansion mediated via HK2 and/or LDHA in the activated RA MΦ and FLS. Nevertheless, the potentiated inflammatory response and the diminished oxidative phosphorylation modulated by Spike protein and/or LPS/IFN-γ stimulation in MΦs or RA FLS were reversed by tofacitinib. In conclusion, tofacitinib suppresses MΦ inflammation and immunometabolism triggered by Spike protein and may provide a promising strategy for COVID-19 patients.
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Affiliation(s)
- Karol Palasiewicz
- Jesse Brown VA Medical CenterChicagoILUSA
- Division of RheumatologyDepartment of Medicine, The University of Illinois at ChicagoChicagoILUSA
| | - Sadiq Umar
- Jesse Brown VA Medical CenterChicagoILUSA
- Division of RheumatologyDepartment of Medicine, The University of Illinois at ChicagoChicagoILUSA
| | - Bianca Romay
- Division of RheumatologyDepartment of Medicine, The University of Illinois at ChicagoChicagoILUSA
| | - Ryan K. Zomorrodi
- Division of RheumatologyDepartment of Medicine, The University of Illinois at ChicagoChicagoILUSA
| | - Shiva Shahrara
- Jesse Brown VA Medical CenterChicagoILUSA
- Division of RheumatologyDepartment of Medicine, The University of Illinois at ChicagoChicagoILUSA
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7
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8
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Eshleman EM, Bortell N, McDermott DS, Crisler WJ, Lenz LL. Myeloid cell responsiveness to interferon-gamma is sufficient for initial resistance to Listeria monocytogenes. CURRENT RESEARCH IN IMMUNOLOGY 2020; 1:1-9. [PMID: 34337387 PMCID: PMC8323841 DOI: 10.1016/j.crimmu.2020.01.001] [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] [Indexed: 11/25/2022] Open
Abstract
The type II interferon (IFNγ) promotes resistance to intracellular pathogens. Most immune and somatic cells also express the IFNγ receptor (IFNGR) and respond to IFNγ. While myeloid cell have been implicated as important targets of IFNγ, it remains unknown if IFNγ signaling to myeloid cell types suffices for resistance to infection. Here, we addressed this question by generating mice in which IFNGR1 is selectively expressed by myeloid cells. These “MSGR1” (myeloid selective IFNGR1) mice express an epitope-tagged Ifngr1 transgene (fGR1) from the myeloid-specific c-fms promoter in a background lacking endogenous Ifngr1. IFNGR staining was selectively observed on myeloid cells in the MSGR1 mice and correlated with responsiveness of these cells to IFNγ. During systemic infection by the bacterium Listeria monocytogenes, activation marker staining was comparable on monocytes from MSGR1 and control B6 mice. Bacterial burdens and survival were also equivalent in MSGR1 and wildtype B6 animals at a timepoint when B6.Ifngr1−/− mice began to succumb. These data confirm that activation of inflammatory monocytes and neutrophils is a key mechanism by which IFNγ promotes innate anti-bacterial immunity and suggest that IFNγ targeting of myeloid cells is largely sufficient to mediate protection against systemic L. monocytogenes. Expression of IFNGR1 is restricted to monocytes and neutrophils in “MSGR1” (myeloid selective IFNGR1) mice. Myeloid cells from MSGR1 mice are responsive to IFNγ and show elevated activation compared to cells from B6.Ifngr1−/− mice. MSGR1 myeloid cells respond to Listeria monocytogenes infection and promote early resistance. IFNγ stimulation of myeloid cells can thus protect against infection independent of effects on other hematopoietic and non-hematopoietic cell populations. Particularly in female mice, IFNγ stimulation of non-myeloid cells may also contribute to improved survival.
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Affiliation(s)
- Emily M Eshleman
- Immunology and Microbiology Department, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Nikki Bortell
- Immunology and Microbiology Department, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Daniel S McDermott
- Immunology and Microbiology Department, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - William J Crisler
- Immunology and Microbiology Department, University of Colorado School of Medicine, Aurora, CO 80045 USA
| | - Laurel L Lenz
- Immunology and Microbiology Department, University of Colorado School of Medicine, Aurora, CO 80045 USA
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9
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Aguilera ER, Lenz LL. Inflammation as a Modulator of Host Susceptibility to Pulmonary Influenza, Pneumococcal, and Co-Infections. Front Immunol 2020; 11:105. [PMID: 32117259 PMCID: PMC7026256 DOI: 10.3389/fimmu.2020.00105] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/15/2020] [Indexed: 12/24/2022] Open
Abstract
Bacterial and viral pathogens are predominant causes of pulmonary infections and complications. Morbidity and mortality from these infections is increased in populations that include the elderly, infants, and individuals with genetic disorders such as Down syndrome. Immune senescence, concurrent infections, and other immune alterations occur in these susceptible populations, but the underlying mechanisms that dictate increased susceptibility to lung infections are not fully defined. Here, we review unique features of the lung as a mucosal epithelial tissue and aspects of inflammatory and immune responses in model pulmonary infections and co-infections by influenza virus and Streptococcus pneumoniae. In these models, lung inflammatory responses are a double-edged sword: recruitment of immune effectors is essential to eliminate bacteria and virus-infected cells, but inflammatory cytokines drive changes in the lung conducive to increased pathogen replication. Excessive accumulation of inflammatory cells also hinders lung function, possibly causing death of the host. Some animal studies have found that targeting host modulators of lung inflammatory responses has therapeutic or prophylactic effects in these infection and co-infection models. However, conflicting results from other studies suggest microbiota, sequence of colonization, or other unappreciated aspects of lung biology also play important roles in the outcome of infections. Regardless, a predisposition to excessive or aberrant inflammatory responses occurs in susceptible human populations. Hence, in appropriate contexts, modulation of inflammatory responses may prove effective for reducing the frequency or severity of pulmonary infections. However, there remain limitations in our understanding of how this might best be achieved—particularly in diverse human populations.
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Affiliation(s)
- Elizabeth R Aguilera
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, United States
| | - Laurel L Lenz
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, United States
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10
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Yang C, McDermot DS, Pasricha S, Brown AS, Bedoui S, Lenz LL, van Driel IR, Hartland EL. IFNγ receptor down-regulation facilitates Legionella survival in alveolar macrophages. J Leukoc Biol 2020; 107:273-284. [PMID: 31793076 PMCID: PMC8015206 DOI: 10.1002/jlb.4ma1019-152r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 10/10/2019] [Accepted: 10/30/2019] [Indexed: 12/17/2022] Open
Abstract
Legionella pneumophila is an opportunistic human pathogen and causative agent of the acute pneumonia known as Legionnaire's disease. Upon inhalation, the bacteria replicate in alveolar macrophages (AM), within an intracellular vacuole termed the Legionella-containing vacuole. We recently found that, in vivo, IFNγ was required for optimal clearance of intracellular L. pneumophila by monocyte-derived cells (MC), but the cytokine did not appear to influence clearance by AM. Here, we report that during L. pneumophila lung infection, expression of the IFNγ receptor subunit 1 (IFNGR1) is down-regulated in AM and neutrophils, but not MC, offering a possible explanation for why AM are unable to effectively restrict L. pneumophila replication in vivo. To test this, we used mice that constitutively express IFNGR1 in AM and found that prevention of IFNGR1 down-regulation enhanced the ability of AM to restrict L. pneumophila intracellular replication. IFNGR1 down-regulation was independent of the type IV Dot/Icm secretion system of L. pneumophila indicating that bacterial effector proteins were not involved. In contrast to previous work, we found that signaling via type I IFN receptors was not required for IFNGR1 down-regulation in macrophages but rather that MyD88- or Trif- mediated NF-κB activation was required. This work has uncovered an alternative signaling pathway responsible for IFNGR1 down-regulation in macrophages during bacterial infection.
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Affiliation(s)
- Chao Yang
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Daniel S McDermot
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Denver, Colorado, USA
| | - Shivani Pasricha
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Australia
| | - Andrew S Brown
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victoria, Australia
| | - Sammy Bedoui
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Laurel L Lenz
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Denver, Colorado, USA
| | - Ian R van Driel
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victoria, Australia
| | - Elizabeth L Hartland
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, Victoria, Australia
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11
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Type I interferon-driven susceptibility to Mycobacterium tuberculosis is mediated by IL-1Ra. Nat Microbiol 2019; 4:2128-2135. [PMID: 31611644 PMCID: PMC6879852 DOI: 10.1038/s41564-019-0578-3] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 09/06/2019] [Indexed: 02/07/2023]
Abstract
The bacterium Mycobacterium tuberculosis (Mtb) causes tuberculosis (TB) and is responsible for more human mortality than any other single pathogen1. Progression to active disease occurs in only a fraction of infected individuals and is predicted by an elevated type I interferon (IFN) response2-7. Whether or how IFNs mediate susceptibility to Mtb has been difficult to study due to a lack of suitable mouse models6-11. Here we examined B6.Sst1S congenic mice that carry the “sensitive” allele of the Sst1 locus that confers susceptibility to Mtb12-14. We found that enhanced production of type I IFNs was responsible for the susceptibility of B6.Sst1S mice to Mtb. Type I IFNs affect the expression of hundreds of genes, several of which have previously been implicated in susceptibility to bacterial infections6,7,15-18. Nevertheless, we found that heterozygous deficiency in just a single IFN target gene, Il1rn, which encodes IL-1 receptor antagonist (IL-1Ra), is sufficient to reverse IFN-driven susceptibility to Mtb in B6.Sst1S mice. In addition, antibody-mediated neutralization of IL-1Ra provided therapeutic benefit to Mtb-infected B6.Sst1S mice. Our results illustrate the value of the B6.Sst1S mouse to model interferon-driven susceptibility to Mtb, and demonstrate that IL-1Ra is an important mediator of type I IFN-driven susceptibility to Mtb infections in vivo.
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12
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Crisler WJ, Eshleman EM, Lenz LL. Ligand-induced IFNGR1 down-regulation calibrates myeloid cell IFNγ responsiveness. Life Sci Alliance 2019; 2:e201900447. [PMID: 31585982 PMCID: PMC6778285 DOI: 10.26508/lsa.201900447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 01/04/2023] Open
Abstract
The type II IFN (IFNγ) enhances antimicrobial activity yet also drives expression of genes that amplify inflammatory responses. Hence, excessive IFNγ stimulation can be pathogenic. Here, we describe a previously unappreciated mechanism whereby IFNγ itself dampens myeloid cell activation. Staining of monocytes from Listeria monocytogenes-infected mice provided evidence of type I IFN-independent reductions in IFNGR1. IFNγ was subsequently found to reduce surface IFNGR1 on cultured murine myeloid cells and human CD14+ peripheral blood mononuclear cells. IFNγ-driven reductions in IFNGR1 were not explained by ligand-induced receptor internalization. Rather, IFNγ reduced macrophage Ifngr1 transcription by altering chromatin structure at putative Ifngr1 enhancer sites. This is a distinct mechanism from that used by type I IFNs. Ligand-induced reductions in IFNGR1 altered myeloid cell sensitivity to IFNγ, blunting activation of STAT1 and 3. Our data, thus, reveal a mechanism by which IFNGR1 abundance and myeloid cell sensitivity to IFNγ can be modulated in the absence of type I IFNs. Multiple mechanisms, thus, exist to calibrate macrophage IFNGR1 abundance, likely permitting the fine tuning of macrophage activation and inflammation.
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Affiliation(s)
- William J Crisler
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Emily M Eshleman
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Laurel L Lenz
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO, USA
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13
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Seledtsov VI, Malashchenko VV, Gazatova ND, Meniailo ME, Morozova EM, Seledtsova GV. Directs effects of granulocyte-macrophage colony stimulating factor (GM-CSF) on adaptive immunogenesis. Hum Vaccin Immunother 2019; 15:2903-2909. [PMID: 31063025 DOI: 10.1080/21645515.2019.1614396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Background: We studied direct effects of human granulocyte-macrophage colony stimulating factor (GM-CSF) on phenotypical characteristics and cytokine-production of non-activated and activated human monocytes/macrophages (Mc/Mphs) and T cells.Methods: Purified Mc/Mphs were activated by bacterial lipopolysaccharide (LPS, 1 μg/ml) for 24 h, while T cells were activated by particles conjugated and antibodies (Abs) against human CD2, CD3, and CD28 for 48 h.Results: GM-CSF treatment (0.01-10 ng/ml) was shown to reduce percentages of CD197 (CCR7)-positive cells in non-activated Mph cultures, without affecting significantly CD14+ (LPS co-receptor), CD16+ (FcγRIII, low-affinity Fc-receptor), CD119+ (interferon-gamma receptor 1), and CD124+ (IL4 receptor α-subunit) cells. In addition, GM-CSF reduced relative numbers of CD197+ cells, as well as CD14+, CD16+, and CD119+ cells in activated Mph cultures without affecting CD124+ cell distribution. GM-CSF at the highest dose of 10 ng/ml enhanced TNF-α and IL-6 (but not IL-1β and IL-10) production in activated Mc/Mphs. In activated T cell cultures, GM-CSF at 0.1-1.0 ng/ml augmented CD38+ cell numbers in naïve СD45RA+/СD197+ and central memory СD45RA-/СD197+ cell subsets, with no effect on effector СD45RA-/СD197- and terminally differentiated effector СD45RA+/СD197- cells. GM-CSF at a low dose (0.01 ng/ml) down-regulated INF-γ production, while at a high dosage (10.0 ng/ml) up-regulated IL-2 and IL-4 production.Conclusion: In general, the results suggest that GM-CSF is able to facilitate the implication of both Mph and T cells in the adaptive immunogenesis.
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Affiliation(s)
| | - Vladimir V Malashchenko
- Center for Medical Biotechnologies, Immanuel Kant Baltic Federal University, Kaliningrad, Russia
| | - Natalja D Gazatova
- Center for Medical Biotechnologies, Immanuel Kant Baltic Federal University, Kaliningrad, Russia
| | - Maksim E Meniailo
- Center for Medical Biotechnologies, Immanuel Kant Baltic Federal University, Kaliningrad, Russia
| | - Ekaterina M Morozova
- Center for Medical Biotechnologies, Immanuel Kant Baltic Federal University, Kaliningrad, Russia
| | - Galina V Seledtsova
- Laboratory for Cellular Biotechnologies, Scientific Research Institute for Fundamental and Clinical Immunology, Novosibirsk, Russia
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14
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Fletcher HA. Systems approaches to correlates of protection and progression to TB disease. Semin Immunol 2018; 39:81-87. [PMID: 30316693 DOI: 10.1016/j.smim.2018.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 10/01/2018] [Indexed: 12/14/2022]
Abstract
Tuberculosis (TB) is the leading cause of death due to a single infectious disease and an effective vaccine would substantially accelerate global efforts to control TB. An immune correlate of protection (CoP) from TB disease could aid vaccine optimization and licensure. This paper summarises opportunities for identifying CoP and highlights results from correlates of risk studies. Although we don't have CoP, there are ongoing efficacy trials with both disease and infection endpoints which provide opportunities for such an analysis. Transcriptomics has successfully identified robust CoR, with transcripts found in the Type I IFN pathway. Correlates of lower risk include BCG antigen specific IFN-γ and natural killer cells. Collating evidence from multiple studies using a range of systems approaches supports a role for IFN-γ in protection from TB disease. In addition, the cells that express the IFN-γ receptor are also important in protective immunity. Protection is a culmination not only of the amount of IFN-γ produced by T cells and NK cells but by the ability of IFN-γ receptor expressing monocytes to respond to IFN-γ. To better understand IFN-γ as a correlate we need to understand host-factors such as age, sex, co-infection, nutritional status and stress which may alter or impair the ability of cells to respond to IFN-γ. These studies highlight recent advances in our understanding of the immune mechanisms of TB disease risk and show the importance of whole systems approaches to correlates of risk analysis. CoP may be useful tools for specific vaccine products in specific populations, but a well-designed CoR analysis can identify novel immune mechanisms and provide insights critical for the development of new and better TB vaccines.
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Affiliation(s)
- Helen A Fletcher
- TB Centre, London School of Hygiene & Tropical Medicine, London, UK.
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15
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lncRNA NTT/PBOV1 Axis Promotes Monocyte Differentiation and Is Elevated in Rheumatoid Arthritis. Int J Mol Sci 2018; 19:ijms19092806. [PMID: 30231487 PMCID: PMC6163842 DOI: 10.3390/ijms19092806] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 09/04/2018] [Accepted: 09/13/2018] [Indexed: 12/29/2022] Open
Abstract
Monocytes/macrophages are important in orchestrating inflammatory responses. However, knowledge of the long noncoding RNA (lncRNA) regulation of monocytic cell differentiation and diseases remains limited. We aimed to elucidate the role of the 17 kb lncRNA noncoding transcript in T cells (NTT) in monocyte functions. Knockdown and chromatin immunoprecipitation (ChIP) assays in THP-1 cells (human monocytic leukemia cell line) revealed that NTT is regulated by the monocyte key transcription factor C/EBPβ and that it binds to the promoter of nearby gene PBOV1 via hnRNP-U. Overexpression of PBOV1 in THP-1 cells resulted in cell cycle G1 arrest, differentiation into macrophages, a marked increase in IL-10 and CXCL10 mRNA levels, and upregulation of the costimulatory molecules. In contrast to the downregulated NTT observed in lipopolysaccharide (LPS)-treated THP-1 cells, the C/EBPβ/NTT/PBOV1 axis was found to be hyperactivated in peripheral blood mononuclear cells (PBMCs) of first-time diagnosed untreated early rheumatoid arthritis (RA) patients, and their gene expression levels decreased markedly after treatment. Higher initial C/EBPβ/NTT/PBOV1 expression levels were associated with a trend of higher disease activity DAS28 scores. In conclusion, our study suggests that the lncRNA NTT is a regulator of inflammation in monocytes, and its activation participates in monocyte/macrophage differentiation and the pathogenesis of RA.
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16
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Lee AJ, Ashkar AA. The Dual Nature of Type I and Type II Interferons. Front Immunol 2018; 9:2061. [PMID: 30254639 PMCID: PMC6141705 DOI: 10.3389/fimmu.2018.02061] [Citation(s) in RCA: 400] [Impact Index Per Article: 66.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/21/2018] [Indexed: 12/31/2022] Open
Abstract
Type I and type II interferons (IFN) are central to both combating virus infection and modulating the antiviral immune response. Indeed, an absence of either the receptor for type I IFNs or IFN-y have resulted in increased susceptibility to virus infection, including increased virus replication and reduced survival. However, an emerging area of research has shown that there is a dual nature to these cytokines. Recent evidence has demonstrated that both type I and type II IFNs have immunoregulatory functions during infection and type II immune responses. In this review, we address the dual nature of type I and type II interferons and present evidence that both antiviral and immunomodulatory functions are critical during virus infection to not only limit virus replication and initiate an appropriate antiviral immune response, but to also negatively regulate this response to minimize tissue damage. Both the activating and negatively regulatory properties of type I and II IFNs work in concert with each other to create a balanced immune response that combats the infection while minimizing collateral damage.
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Affiliation(s)
- Amanda J Lee
- Department of Pathology and Molecular Medicine, McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
| | - Ali A Ashkar
- Department of Pathology and Molecular Medicine, McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada
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17
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Crisler WJ, Lenz LL. Crosstalk between type I and II interferons in regulation of myeloid cell responses during bacterial infection. Curr Opin Immunol 2018; 54:35-41. [PMID: 29886270 DOI: 10.1016/j.coi.2018.05.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 05/22/2018] [Accepted: 05/22/2018] [Indexed: 12/29/2022]
Abstract
Type I and type II interferons (IFNα/β and IFNγ) are cytokines that play indispensable roles in directing myeloid cell activity during inflammatory and immune responses. Each IFN type binds a distinct receptor (IFNAR or IFNGR) to transduce signals that reshape gene expression and function of myeloid and other cell types. In the context of murine models and human bacterial infections, production of IFNγ generally promotes resistance while production of IFNα/β is associated with increased host susceptibility. Here, we review mechanisms of crosstalk between type I and II IFNs in myeloid cells and their impact on myeloid cell activation and anti-microbial function.
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Affiliation(s)
- William J Crisler
- Department of Microbiology and Immunology, University of Colorado School of Medicine, Aurora, CO 80045, United States
| | - Laurel L Lenz
- Department of Microbiology and Immunology, University of Colorado School of Medicine, Aurora, CO 80045, United States.
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18
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Meek SM, Williams MA. IFN-Gamma-Dependent and Independent Mechanisms of CD4⁺ Memory T Cell-Mediated Protection from Listeria Infection. Pathogens 2018; 7:pathogens7010022. [PMID: 29438281 PMCID: PMC5874748 DOI: 10.3390/pathogens7010022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 01/29/2018] [Accepted: 02/11/2018] [Indexed: 11/28/2022] Open
Abstract
While CD8+ memory T cells can promote long-lived protection from secondary exposure to intracellular pathogens, less is known regarding the direct protective mechanisms of CD4+ T cells. We utilized a prime/boost model in which mice are initially exposed to an acutely infecting strain of lymphocytic choriomeningitis virus (LCMV), followed by a heterologous rechallenge with Listeria monocytogenes recombinantly expressing the MHC Class II-restricted LCMV epitope, GP61–80 (Lm-gp61). We found that heterologous Lm-gp61 rechallenge resulted in robust activation of CD4+ memory T cells and that they were required for rapid bacterial clearance. We further assessed the relative roles of TNF and IFNγ in the direct anti-bacterial function of CD4+ memory T cells. We found that disruption of TNF resulted in a complete loss of protection mediated by CD4+ memory T cells, whereas disruption of IFNγ signaling to macrophages results in only a partial loss of protection. The protective effect mediated by CD4+ T cells corresponded to the rapid accumulation of pro-inflammatory macrophages in the spleen and an altered inflammatory environment in vivo. Overall, we conclude that protection mediated by CD4+ memory T cells from heterologous Listeria challenge is most directly dependent on TNF, whereas IFNγ only plays a minor role.
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Affiliation(s)
- Stephanie M Meek
- Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA.
| | - Matthew A Williams
- Department of Pathology, University of Utah, Salt Lake City, UT 84112, USA.
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