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First NJ, Parrish KM, Martínez-Pérez A, González-Fernández Á, Bharrhan S, Woolard M, McLachlan JB, Scott RS, Wang J, Gestal MC. Bordetella spp. block eosinophil recruitment to suppress the generation of early mucosal protection. Cell Rep 2023; 42:113294. [PMID: 37883230 DOI: 10.1016/j.celrep.2023.113294] [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: 05/03/2023] [Revised: 08/21/2023] [Accepted: 09/29/2023] [Indexed: 10/28/2023] Open
Abstract
Bordetella spp. are respiratory pathogens equipped with immune evasion mechanisms. We previously characterized a Bordetella bronchiseptica mutant (RB50ΔbtrS) that fails to suppress host responses, leading to rapid clearance and long-lasting immunity against reinfection. This work revealed eosinophils as an exclusive requirement for RB50ΔbtrS clearance. We also show that RB50ΔbtrS promotes eosinophil-mediated B/T cell recruitment and inducible bronchus-associated lymphoid tissue (iBALT) formation, with eosinophils being present throughout iBALT for Th17 and immunoglobulin A (IgA) responses. Finally, we provide evidence that XCL1 is critical for iBALT formation but not maintenance, proposing a novel role for eosinophils as facilitators of adaptive immunity against B. bronchiseptica. RB50ΔbtrS being incapable of suppressing eosinophil effector functions illuminates active, bacterial targeting of eosinophils to achieve successful persistence and reinfection. Overall, our discoveries contribute to understanding cellular mechanisms for use in future vaccines and therapies against Bordetella spp. and extension to other mucosal pathogens.
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Affiliation(s)
- Nicholas J First
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA
| | - Katelyn M Parrish
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA
| | - Amparo Martínez-Pérez
- CINBIO, Universidade de Vigo, Immunology Group, Instituto de Investigación Sanitaria Galicia Sur (IIS Galicia Sur), SERGAS-UVIGO, 36310 Vigo, Galicia, Spain
| | - África González-Fernández
- CINBIO, Universidade de Vigo, Immunology Group, Instituto de Investigación Sanitaria Galicia Sur (IIS Galicia Sur), SERGAS-UVIGO, 36310 Vigo, Galicia, Spain
| | - Sushma Bharrhan
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA; Immunophenotyping Core, Center for Applied Immunology and Pathological Processes, Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA
| | - Matthew Woolard
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA; Immunophenotyping Core, Center for Applied Immunology and Pathological Processes, Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA
| | - James B McLachlan
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Rona S Scott
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA; Bioinformatics and Modeling Core, Center for Applied Immunology and Pathological Processes, Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA
| | - Jian Wang
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA; Bioinformatics and Modeling Core, Center for Applied Immunology and Pathological Processes, Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA
| | - Monica C Gestal
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA 71106, USA.
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2
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Matsumoto R, Gray J, Rybkina K, Oppenheimer H, Levy L, Friedman LM, Khamaisi M, Meng W, Rosenfeld AM, Guyer RS, Bradley MC, Chen D, Atkinson MA, Brusko TM, Brusko M, Connors TJ, Luning Prak ET, Hershberg U, Sims PA, Hertz T, Farber DL. Induction of bronchus-associated lymphoid tissue is an early life adaptation for promoting human B cell immunity. Nat Immunol 2023; 24:1370-1381. [PMID: 37460638 PMCID: PMC10529876 DOI: 10.1038/s41590-023-01557-3] [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: 04/10/2023] [Accepted: 06/09/2023] [Indexed: 07/20/2023]
Abstract
Infants and young children are more susceptible to common respiratory pathogens than adults but can fare better against novel pathogens like severe acute respiratory syndrome coronavirus 2. The mechanisms by which infants and young children mount effective immune responses to respiratory pathogens are unknown. Through investigation of lungs and lung-associated lymph nodes from infant and pediatric organ donors aged 0-13 years, we show that bronchus-associated lymphoid tissue (BALT), containing B cell follicles, CD4+ T cells and functionally active germinal centers, develop during infancy. BALT structures are prevalent around lung airways during the first 3 years of life, and their numbers decline through childhood coincident with the accumulation of memory T cells. Single-cell profiling and repertoire analysis reveals that early life lung B cells undergo differentiation, somatic hypermutation and immunoglobulin class switching and exhibit a more activated profile than lymph node B cells. Moreover, B cells in the lung and lung-associated lymph nodes generate biased antibody responses to multiple respiratory pathogens compared to circulating antibodies, which are mostly specific for vaccine antigens in the early years of life. Together, our findings provide evidence for BALT as an early life adaptation for mobilizing localized immune protection to the diverse respiratory challenges during this formative life stage.
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Affiliation(s)
- Rei Matsumoto
- Department of Surgery, Columbia University Irving Medical Center, New York, NY, USA
| | - Joshua Gray
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY, USA
| | - Ksenia Rybkina
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY, USA
| | - Hanna Oppenheimer
- Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
- The National Institute for Biotechnology in the Negev, Ben-Gurion University of Negev, Be'er-Sheva, Israel
| | - Lior Levy
- Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
- The National Institute for Biotechnology in the Negev, Ben-Gurion University of Negev, Be'er-Sheva, Israel
| | - Lilach M Friedman
- Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
- The National Institute for Biotechnology in the Negev, Ben-Gurion University of Negev, Be'er-Sheva, Israel
| | | | - Wenzhao Meng
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Aaron M Rosenfeld
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Rebecca S Guyer
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY, USA
| | - Marissa C Bradley
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - David Chen
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY, USA
| | - Mark A Atkinson
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida Diabetes Institute, Gainesville, FL, USA
| | - Todd M Brusko
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida Diabetes Institute, Gainesville, FL, USA
| | - Maigan Brusko
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida Diabetes Institute, Gainesville, FL, USA
| | - Thomas J Connors
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Eline T Luning Prak
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Uri Hershberg
- Department of Human Biology, University of Haifa, Haifa, Israel
| | - Peter A Sims
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY, USA
- Department of Biochemistry & Molecular Biophysics, Columbia University Irving Medical Center, New York, NY, USA
| | - Tomer Hertz
- Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
- The National Institute for Biotechnology in the Negev, Ben-Gurion University of Negev, Be'er-Sheva, Israel
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Donna L Farber
- Department of Surgery, Columbia University Irving Medical Center, New York, NY, USA.
- Department of Microbiology and Immunology, Columbia University Irving Medical Center, New York, NY, USA.
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3
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Prince L, Martín-Faivre L, Villeret B, Sanchez-Guzman D, Le Guen P, Sallenave JM, Garcia-Verdugo I. Eosinophils Recruited during Pulmonary Vaccination Regulate Mucosal Antibody Production. Am J Respir Cell Mol Biol 2023; 68:186-200. [PMID: 36194580 DOI: 10.1165/rcmb.2022-0236oc] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Eosinophils have been previously shown to be able to regulate early humoral responses during systemic vaccination. Here we investigated the role of eosinophils during pulmonary vaccination, comparing vaccine-induced responses in eosinophil-deficient (ΔdblGATA) and wild-type mice using a Th2 adjuvant. We observed that eosinophils were needed to induce a complete vaccine response, thereby eliciting specific antibody-secreting plasma cells in the regional lymph nodes and antibody secretion in the BAL at the early stage of the immune response. Reintroduction of eosinophils in the lungs of ΔdblGATA mice during the priming stage enhanced both specific IgM and IgG plasma cells but not specific IgA plasma cells. Upon vaccination, eosinophils migrated to the lungs and secreted cytokines involved in B-cell activation, which might promote antibody production. Importantly, however, the absence of eosinophils did not impair late immune responses in a prime/boost protocol because, in that setup, we uncovered a compensating mechanism involving a Th17 pathway. In conclusion, our data demonstrate for the first time a new role for eosinophils during lung mucosal vaccination, whereby they accelerate early immune responses (IgM and IgG) while regulating IgA production at the late stages.
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Affiliation(s)
- Lisa Prince
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
| | - Lydie Martín-Faivre
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
| | - Bérengère Villeret
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
| | - Daniel Sanchez-Guzman
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
| | - Pierre Le Guen
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
| | - Jean-Michel Sallenave
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
| | - Ignacio Garcia-Verdugo
- INSERM U1152, Physiopathologie et épidémiologie des maladies respiratoires, Université Paris Cité, Paris, France
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4
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Considerations for Novel COVID-19 Mucosal Vaccine Development. Vaccines (Basel) 2022; 10:vaccines10081173. [PMID: 35893822 PMCID: PMC9329946 DOI: 10.3390/vaccines10081173] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/19/2022] [Accepted: 07/19/2022] [Indexed: 01/27/2023] Open
Abstract
Mucosal surfaces are the first contact sites of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Most SARS-CoV-2 vaccines induce specific IgG responses but provide limited mucosal immunity. Cytokine B-cell activation factor (BAFF) and A proliferation-inducing ligand (APRIL) in the tumor necrosis factor (TNF) superfamily play key immunological functions during B cell development and antibody production. Furthermore, homeostatic chemokines, such as C-X-C motif chemokine ligand 13 (CXCL13), chemokine (C–C motif) ligand 19 (CCL19), and CCL21, can induce B- and T-cell responses to infection and promote the formation of inducible bronchus-associated lymphoid tissues (iBALT), where specific local immune responses and memory cells are generated. We reviewed the role of BAFF, APRIL, CXCL13, CCL19, and CCL21 in the activation of local B-cell responses and antibody production, and the formation of iBALT in the lung following viral respiratory infections. We speculate that mucosal vaccines may offer more efficient protection against SARS-CoV-2 infection than systematic vaccines and hypothesize that a novel SARS-CoV-2 mRNA mucosal vaccine using BAFF/APRIL or CXCL13 as immunostimulants combined with the spike protein-encoding mRNA may enhance the efficiency of the local immune response and prevent the early stages of SARS-CoV-2 replication and the rapid viral clearance from the airways.
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5
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Role of tertiary lymphoid organs in the regulation of immune responses in the periphery. Cell Mol Life Sci 2022; 79:359. [PMID: 35689679 PMCID: PMC9188279 DOI: 10.1007/s00018-022-04388-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 04/28/2022] [Accepted: 05/20/2022] [Indexed: 12/12/2022]
Abstract
Tertiary lymphoid organs (TLOs) are collections of immune cells resembling secondary lymphoid organs (SLOs) that form in peripheral, non-lymphoid tissues in response to local chronic inflammation. While their formation mimics embryologic lymphoid organogenesis, TLOs form after birth at ectopic sites in response to local inflammation resulting in their ability to mount diverse immune responses. The structure of TLOs can vary from clusters of B and T lymphocytes to highly organized structures with B and T lymphocyte compartments, germinal centers, and lymphatic vessels (LVs) and high endothelial venules (HEVs), allowing them to generate robust immune responses at sites of tissue injury. Although our understanding of the formation and function of these structures has improved greatly over the last 30 years, their role as mediators of protective or pathologic immune responses in certain chronic inflammatory diseases remains enigmatic and may differ based on the local tissue microenvironment in which they form. In this review, we highlight the role of TLOs in the regulation of immune responses in chronic infection, chronic inflammatory and autoimmune diseases, cancer, and solid organ transplantation.
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6
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Murine Respiratory Tract Infection with Classical Klebsiella pneumoniae Induces Bronchus-Associated Lymphoid Tissue. Infect Immun 2022; 90:e0059621. [PMID: 35311545 DOI: 10.1128/iai.00596-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Klebsiella pneumoniae is a Gram-negative, opportunistic pathogen that commonly causes nosocomial pneumonia, urinary tract infection, and septicemia. Our recent work utilizing a murine model of respiratory tract infection with classical K. pneumoniae demonstrated leukocyte aggregates in the lungs of mice at 28 days postinfection. Here, we sought to characterize the composition and development of these structures. Histopathological analyses of murine lungs revealed immune cell clusters surrounding the pulmonary vasculature and airways by 14 days postinfection, resembling inducible bronchus-associated lymphoid tissue (iBALT). Further investigation of these structures demonstrated central B cell aggregates with concomitant dispersed T cells. At day 28 postinfection, these lymphoid clusters expressed germinal center markers and CXCL12, qualifying these structures as iBALT with nonclassical B cell follicles. Investigations in mutant mice revealed that those lacking B and/or T cells were not able to form fully defined iBALT structures, although some rudimentary B cell clusters were identified in mice lacking T cells. The longevity of K. pneumoniae-induced BALT was assessed for up to 120 days postinfection. Lymphoid aggregates significantly decreased in size and quantity by 90 days after K. pneumoniae infection; however, aggregates persisted in mice that were restimulated with K. pneumoniae every 30 days. Finally, infections of mice with an array of classical K. pneumoniae clinical isolates demonstrated that the development of these structures is a common feature of K. pneumoniae lung infection. Together, these data confirm that murine lungs infected with K. pneumoniae develop iBALT, which may play a role in pulmonary immunity to this troublesome pathogen.
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7
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Carpenter SM, Lu LL. Leveraging Antibody, B Cell and Fc Receptor Interactions to Understand Heterogeneous Immune Responses in Tuberculosis. Front Immunol 2022; 13:830482. [PMID: 35371092 PMCID: PMC8968866 DOI: 10.3389/fimmu.2022.830482] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 02/07/2022] [Indexed: 12/25/2022] Open
Abstract
Despite over a century of research, Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), continues to kill 1.5 million people annually. Though less than 10% of infected individuals develop active disease, the specific host immune responses that lead to Mtb transmission and death, as well as those that are protective, are not yet fully defined. Recent immune correlative studies demonstrate that the spectrum of infection and disease is more heterogenous than has been classically defined. Moreover, emerging translational and animal model data attribute a diverse immune repertoire to TB outcomes. Thus, protective and detrimental immune responses to Mtb likely encompass a framework that is broader than T helper type 1 (Th1) immunity. Antibodies, Fc receptor interactions and B cells are underexplored host responses to Mtb. Poised at the interface of initial bacterial host interactions and in granulomatous lesions, antibodies and Fc receptors expressed on macrophages, neutrophils, dendritic cells, natural killer cells, T and B cells have the potential to influence local and systemic adaptive immune responses. Broadening the paradigm of protective immunity will offer new paths to improve diagnostics and vaccines to reduce the morbidity and mortality of TB.
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Affiliation(s)
- Stephen M. Carpenter
- Division of Infectious Disease and HIV Medicine, Department of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Cleveland Medical Center, University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Lenette L. Lu
- Division of Geographic Medicine and Infectious Diseases, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, United States
- Department of Immunology, UT Southwestern Medical Center, Dallas, TX, United States
- Parkland Health and Hospital System, Dallas, TX, United States
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8
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Muruganandah V, Kupz A. Immune responses to bacterial lung infections and their implications for vaccination. Int Immunol 2021; 34:231-248. [PMID: 34850883 DOI: 10.1093/intimm/dxab109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/28/2021] [Indexed: 11/14/2022] Open
Abstract
The pulmonary immune system plays a vital role in protecting the delicate structures of gaseous exchange against invasion from bacterial pathogens. With antimicrobial resistance becoming an increasing concern, finding novel strategies to develop vaccines against bacterial lung diseases remains a top priority. In order to do so, a continued expansion of our understanding of the pulmonary immune response is warranted. Whilst some aspects are well characterised, emerging paradigms such as the importance of innate cells and inducible immune structures in mediating protection provide avenues of potential to rethink our approach to vaccine development. In this review, we aim to provide a broad overview of both the innate and adaptive immune mechanisms in place to protect the pulmonary tissue from invading bacterial organisms. We use specific examples from several infection models and human studies to depict the varying functions of the pulmonary immune system that may be manipulated in future vaccine development. Particular emphasis has been placed on emerging themes that are less reviewed and underappreciated in vaccine development studies.
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Affiliation(s)
- Visai Muruganandah
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD 4878, Australia
| | - Andreas Kupz
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD 4878, Australia
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9
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Hwang JY, Silva-Sanchez A, Carragher DM, Garcia-Hernandez MDLL, Rangel-Moreno J, Randall TD. Inducible Bronchus-Associated Lymphoid Tissue (iBALT) Attenuates Pulmonary Pathology in a Mouse Model of Allergic Airway Disease. Front Immunol 2020; 11:570661. [PMID: 33101290 PMCID: PMC7545112 DOI: 10.3389/fimmu.2020.570661] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/24/2020] [Indexed: 01/09/2023] Open
Abstract
Inducible Bronchus Associated Lymphoid Tissue (iBALT) is an ectopic lymphoid tissue associated with severe forms of chronic lung diseases, including chronic obstructive pulmonary disease, rheumatoid lung disease, hypersensitivity pneumonitis and asthma, suggesting that iBALT may exacerbate these clinical conditions. However, despite the link between pulmonary pathology and iBALT formation, the role of iBALT in pathogenesis remains unknown. Here we tested whether the presence of iBALT in the lung prior to sensitization and challenge with a pulmonary allergen altered the biological outcome of disease. We found that the presence of iBALT did not exacerbate Th2 responses to pulmonary sensitization with ovalbumin. Instead, we found that mice with iBALT exhibited delayed Th2 accumulation in the lung, reduced eosinophil recruitment, reduced goblet cell hyperplasia and reduced mucus production. The presence of iBALT did not alter Th2 priming, but instead delayed the accumulation of Th2 cells in the lung following challenge and altered the spatial distribution of T cells in the lung. These results suggest that the formation of iBALT and sequestration of effector T cells in the context of chronic pulmonary inflammation may be a mechanism by which the immune system attenuates pulmonary inflammation and prevents excessive pathology.
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Affiliation(s)
- Ji Young Hwang
- Division of Clinical Immunology and Rheumatology, The Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States.,Department of Microbiology and Immunology, University of Rochester, Rochester, NY, United States
| | - Aaron Silva-Sanchez
- Division of Clinical Immunology and Rheumatology, The Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | | | - Maria de la Luz Garcia-Hernandez
- Division of Allergy Immunology and Rheumatology, The Department of Medicine, University of Rochester, Rochester, NY, United States
| | - Javier Rangel-Moreno
- Division of Allergy Immunology and Rheumatology, The Department of Medicine, University of Rochester, Rochester, NY, United States
| | - Troy D Randall
- Division of Clinical Immunology and Rheumatology, The Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
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10
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Twentyman J, Morffy Smith C, Nims JS, Dahler AA, Rosen DA. A murine model demonstrates capsule-independent adaptive immune protection in survivors of Klebsiella pneumoniae respiratory tract infection. Dis Model Mech 2020; 13:13/3/dmm043240. [PMID: 32298236 PMCID: PMC7104859 DOI: 10.1242/dmm.043240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/20/2020] [Indexed: 01/09/2023] Open
Abstract
Klebsiella pneumoniae represents a growing clinical threat, given its rapid development of antibiotic resistance, necessitating new therapeutic strategies. Existing live-infection models feature high mortality rates, limiting their utility in the study of natural adaptive immune response to this pathogen. We developed a preclinical model of pneumonia with low overall mortality, in which previously exposed mice are protected from subsequent respiratory tract challenge with K. pneumoniae Histologic analyses of infected murine lungs demonstrate lymphocytic aggregates surrounding vasculature and larger airways. Initial exposure in RAG1 knockout mice (lacking functional B and T cells) failed to confer protection against subsequent K. pneumoniae challenge. While administration of isolated K. pneumoniae capsule was sufficient to provide protection, we also found that initial inoculation with K. pneumoniae mutants lacking capsule (Δcps), O-antigen (ΔwecA) or both conferred protection from subsequent wild-type infection and elicited K. pneumoniae-specific antibody responses, indicating that non-capsular antigens may also elicit protective immunity. Experiments in this model will inform future development of multivalent vaccines to prevent invasive K. pneumoniae infections.
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Affiliation(s)
- Joy Twentyman
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Catherine Morffy Smith
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Julia S Nims
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Aubree A Dahler
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Washington University School of Medicine, St Louis, MO 63110, USA
| | - David A Rosen
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Washington University School of Medicine, St Louis, MO 63110, USA .,Department of Molecular Microbiology, Washington University School of Medicine, St Louis, MO 63110, USA
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11
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Anatomical Uniqueness of the Mucosal Immune System (GALT, NALT, iBALT) for the Induction and Regulation of Mucosal Immunity and Tolerance. MUCOSAL VACCINES 2020. [PMCID: PMC7149644 DOI: 10.1016/b978-0-12-811924-2.00002-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Marin ND, Dunlap MD, Kaushal D, Khader SA. Friend or Foe: The Protective and Pathological Roles of Inducible Bronchus-Associated Lymphoid Tissue in Pulmonary Diseases. THE JOURNAL OF IMMUNOLOGY 2019; 202:2519-2526. [PMID: 31010841 DOI: 10.4049/jimmunol.1801135] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 12/26/2018] [Indexed: 02/06/2023]
Abstract
Inducible bronchus-associated lymphoid tissue (iBALT) is a tertiary lymphoid structure that resembles secondary lymphoid organs. iBALT is induced in the lung in response to Ag exposure. In some cases, such as infection with Mycobacterium tuberculosis, the formation of iBALT structure is indicative of an effective protective immune response. However, with persistent exposure to Ags during chronic inflammation, allergy, or autoimmune diseases, iBALT may be associated with exacerbation of inflammation. iBALT is characterized by well-organized T and B areas enmeshed with conventional dendritic cells, follicular dendritic cells, and stromal cells, usually located surrounding airways or blood vessels. Several of the molecular signals and cellular contributors that mediate formation of iBALT structures have been recently identified. This review will outline the recent findings associated with the formation and maintenance of iBALT and their contributions toward a protective or pathogenic function in pulmonary disease outcome.
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Affiliation(s)
- Nancy D Marin
- Department of Molecular Microbiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110
| | - Micah D Dunlap
- Department of Molecular Microbiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110.,Department of Pathology and Immunology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110; and
| | - Deepak Kaushal
- Division of Bacteriology and Parasitology, Tulane National Primate Research Center, Covington, LA 70118
| | - Shabaana A Khader
- Department of Molecular Microbiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110;
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13
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Abstract
Pulmonary respiration inevitably exposes the mucosal surface of the lung to potentially noxious stimuli, including pathogens, allergens, and particulates, each of which can trigger pulmonary damage and inflammation. As inflammation resolves, B and T lymphocytes often aggregate around large bronchi to form inducible Bronchus-Associated Lymphoid Tissue (iBALT). iBALT formation can be initiated by a diverse array of molecular pathways that converge on the activation and differentiation of chemokine-expressing stromal cells that serve as the scaffolding for iBALT and facilitate the recruitment, retention, and organization of leukocytes. Like conventional lymphoid organs, iBALT recruits naïve lymphocytes from the blood, exposes them to local antigens, in this case from the airways, and supports their activation and differentiation into effector cells. The activity of iBALT is demonstrably beneficial for the clearance of respiratory pathogens; however, it is less clear whether it dampens or exacerbates inflammatory responses to non-infectious agents. Here, we review the evidence regarding the role of iBALT in pulmonary immunity and propose that the final outcome depends on the context of the disease.
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García-Hernández MDLL, Uribe-Uribe NO, Espinosa-González R, Kast WM, Khader SA, Rangel-Moreno J. A Unique Cellular and Molecular Microenvironment Is Present in Tertiary Lymphoid Organs of Patients with Spontaneous Prostate Cancer Regression. Front Immunol 2017; 8:563. [PMID: 28567040 PMCID: PMC5434117 DOI: 10.3389/fimmu.2017.00563] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 04/27/2017] [Indexed: 12/20/2022] Open
Abstract
Objective Multiple solid cancers contain tertiary lymphoid organs (TLO). However, it is unclear whether they promote tumor rejection, facilitate tumor evasion, or simply whether they are a byproduct of chronic inflammation. We hypothesize that although chronic inflammation induces TLO formation, the tumor milieu can modulate TLO organization and functions in prostate cancer. Therefore, our study seeks to elucidate the cellular and molecular signatures in unique prostatectomy specimens from evanescent carcinoma patients to identify markers of cancer regression, which could be harnessed to modulate local immunosuppression or potentially enhance TLO function. Methods We used multicolor immunofluorescence to stain prostate tissues, collected at different stages of cancer progression (prostatic intraepithelial neoplasia, intermediate and advanced cancer) or from patients with evanescent prostate carcinoma. Tissues were stained with antibodies specific for pro-inflammatory molecules (cyclooxygenase 2, CXCL10, IL17), tumor-infiltrating immune cells (mature DC-LAMP+ dendritic cells, CD3+ T cells, CD3+Foxp3+ regulatory T cells (Treg), T bet+ Th1 cells, granzyme B+ cytotoxic cells), and stromal cell populations (lymphatic vessels, tumor neovessels, high endothelial venules (HEV), stromal cells), which promote prostate tumor growth or are critical components of tumor-associated TLO. Results Generally, inflammatory cells are located at the margins of tumors. Unexpectedly, we found TLO within prostate tumors from patients at different stages of cancer and in unique samples from patients with spontaneous cancer remission. In evanescent prostate carcinomas, accumulation of Treg was compromised, while Tbet+ T cells and CD8 T cells were abundant in tumor-associated TLO. In addition, we found a global decrease in tumor neovascularization and the coverage by cells positive for cyclooxygenase 2 (COX2). Finally, consistent with tumor regression, prostate stem cell antigen was considerably reduced in TLO and tumor areas from evanescent carcinoma patients. Conclusion Collectively, our results suggest that COX2 and Treg are attractive therapeutic targets that can be harnessed to enhance TLO-driven tumor immunity against prostate cancer. Specially, the presence of HEV and lymphatics indicate that TLO can be used as a platform for delivery of cell-based and/or COX2 blocking therapies to improve control of tumor growth in prostate cancer.
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Affiliation(s)
| | - Norma Ofelia Uribe-Uribe
- Department of Anatomy and Anatomical Pathology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Mexico City, Mexico
| | - Ricardo Espinosa-González
- Department of Anatomy and Anatomical Pathology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Mexico City, Mexico
| | - W Martin Kast
- Department of Molecular Microbiology and Immunology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA.,Department of Urology, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, USA.,Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, CA, USA
| | - Shabaana A Khader
- Department of Molecular Microbiology, Washington University in Saint Louis, St. Louis, MO, USA
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Hwang JY, Randall TD, Silva-Sanchez A. Inducible Bronchus-Associated Lymphoid Tissue: Taming Inflammation in the Lung. Front Immunol 2016; 7:258. [PMID: 27446088 PMCID: PMC4928648 DOI: 10.3389/fimmu.2016.00258] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 06/17/2016] [Indexed: 01/09/2023] Open
Abstract
Following pulmonary inflammation, leukocytes that infiltrate the lung often assemble into structures known as inducible Bronchus-Associated Lymphoid Tissue (iBALT). Like conventional lymphoid organs, areas of iBALT have segregated B and T cell areas, specialized stromal cells, high endothelial venules, and lymphatic vessels. After inflammation is resolved, iBALT is maintained for months, independently of inflammation. Once iBALT is formed, it participates in immune responses to pulmonary antigens, including those that are unrelated to the iBALT-initiating antigen, and often alters the clinical course of disease. However, the mechanisms that govern immune responses in iBALT and determine how iBALT impacts local and systemic immunity are poorly understood. Here, we review our current understanding of iBALT formation and discuss how iBALT participates in pulmonary immunity.
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Affiliation(s)
- Ji Young Hwang
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham , Birmingham, AL , USA
| | - Troy D Randall
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham , Birmingham, AL , USA
| | - Aaron Silva-Sanchez
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham , Birmingham, AL , USA
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16
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Helbig S, Rekhtman S, Dostie K, Casler A, Schneider T, Hochberg NS, Ganley-Leal L. B cell responses in older adults with latent tuberculosis: Considerations for vaccine development. ACTA ACUST UNITED AC 2016; 1:44-52. [PMID: 30271881 PMCID: PMC6159916 DOI: 10.15761/gvi.1000112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Reactivation of latent tuberculosis (LTBI) is more common among the aging population and may contribute to increased transmission in long-term health care facilities. Difficulties in detecting LTBI due to potential blunting of the tuberculin skin test (TST), and the lowered ability of the elderly to tolerate the course of antibiotics, underscore the need for an effective vaccine. Immuno-senescence reduces the capacity of vaccines to induce sufficient levels of protective immunity against many pathogens, further increasing the susceptibility of the elderly to infectious diseases. We sought to evaluate the response of B cells to Mycobacterium tuberculosis (Mtb) in residents of long-term care facilities to determine the feasibility of using a vaccine to control infection and transmission from reactivated LTBI. Our results demonstrate that although B cell responses were higher in subjects with LTBI, Mtb antigens could stimulate B cell activation and differentiation in vitro in TST negative subjects. B cells from elderly subjects expressed high basal levels of Toll-like receptor (TLR)2 and TLR4 and responded strongly to Mtb ligands with some activation pathways dependent on TLR2. B cells derived from blood, tonsil and spleen from younger subjects responded similarly and to the same magnitude. These results suggest that B cell responses are robust in the elderly and modifications to a TB vaccine, such as TLR2 ligand-based adjuvants, may help increase immune responses to a protective level.
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Affiliation(s)
- Sina Helbig
- Section of Infectious Diseases, Boston University School of Medicine, Boston, MA, USA
| | - Sergey Rekhtman
- Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - Kristen Dostie
- Center for International Health Research, Rhode Island Hospital, Providence, RI, USA
| | | | | | - Natasha S Hochberg
- Section of Infectious Diseases, Boston University School of Medicine, Boston, MA, USA.,Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - Lisa Ganley-Leal
- Section of Infectious Diseases, Boston University School of Medicine, Boston, MA, USA.,Center for International Health Research, Rhode Island Hospital, Providence, RI, USA.,STC Biologics, Inc. Cambridge, MA, USA
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Hill TM, Gilchuk P, Cicek BB, Osina MA, Boyd KL, Durrant DM, Metzger DW, Khanna KM, Joyce S. Border Patrol Gone Awry: Lung NKT Cell Activation by Francisella tularensis Exacerbates Tularemia-Like Disease. PLoS Pathog 2015; 11:e1004975. [PMID: 26068662 PMCID: PMC4465904 DOI: 10.1371/journal.ppat.1004975] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/26/2015] [Indexed: 12/19/2022] Open
Abstract
The respiratory mucosa is a major site for pathogen invasion and, hence, a site requiring constant immune surveillance. The type I, semi-invariant natural killer T (NKT) cells are enriched within the lung vasculature. Despite optimal positioning, the role of NKT cells in respiratory infectious diseases remains poorly understood. Hence, we assessed their function in a murine model of pulmonary tularemia—because tularemia is a sepsis-like proinflammatory disease and NKT cells are known to control the cellular and humoral responses underlying sepsis. Here we show for the first time that respiratory infection with Francisella tularensis live vaccine strain resulted in rapid accumulation of NKT cells within the lung interstitium. Activated NKT cells produced interferon-γ and promoted both local and systemic proinflammatory responses. Consistent with these results, NKT cell-deficient mice showed reduced inflammatory cytokine and chemokine response yet they survived the infection better than their wild type counterparts. Strikingly, NKT cell-deficient mice had increased lymphocytic infiltration in the lungs that organized into tertiary lymphoid structures resembling induced bronchus-associated lymphoid tissue (iBALT) at the peak of infection. Thus, NKT cell activation by F. tularensis infection hampers iBALT formation and promotes a systemic proinflammatory response, which exacerbates severe pulmonary tularemia-like disease in mice. NKT cells are innate-like lymphocytes with a demonstrated role in a wide range of diseases. Often cited for their ability to rapidly produce a variety of cytokines upon activation, they have long been appreciated for their ability to “jump-start” the immune system and to shape the quality of both the innate and adaptive response. This understanding of their function has been deduced from in vitro experiments or through the in vivo administration of highly potent, chemically synthesized lipid ligands, which may not necessarily reflect a physiologically relevant response as observed in a natural infection. Using a mouse model of pulmonary tularemia, we report that intranasal infection with the live vaccine strain of F. tularensis rapidly activates NKT cells and promotes systemic inflammation, increased tissue damage, and a dysregulated immune response resulting in increased morbidity and mortality in infected mice. Our data highlight the detrimental effects of NKT cell activation and identify a potential new target for therapies against pulmonary tularemia.
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Affiliation(s)
- Timothy M. Hill
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Pavlo Gilchuk
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee, United States of America
| | - Basak B. Cicek
- Department of Immunology, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Maria A. Osina
- Department of Psychology and Human Development, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Kelli L. Boyd
- Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee, United States of America
| | - Douglas M. Durrant
- Center for Immunology and Microbial Disease, Albany Medical College, Albany, New York, United States of America
| | - Dennis W. Metzger
- Center for Immunology and Microbial Disease, Albany Medical College, Albany, New York, United States of America
| | - Kamal M. Khanna
- Department of Immunology, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Sebastian Joyce
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
- Veterans Administration Tennessee Valley Healthcare System, Nashville, Tennessee, United States of America
- * E-mail:
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18
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Abstract
It is well accepted that T cell responses are integral in providing protection during pathogenic infections. In numerous tissues, T cell responses are generated to combat infection. Typically, these T cell responses are primed in draining lymph nodes (LN) by dendritic cells (DC) that have migrated from the infected tissue. Previously, it was thought that after the initial encounter between DC and T cells in the LN, the T cells underwent a programmed response. However, it has become increasingly clear that direct interactions between DCs and T cells in infected, peripheral tissues can modulate the activation, effector function, tissue residence, and memory responses of these T cells. This review will highlight the contribution of local, direct DC: T cell interactions to the regulation of T cell responses in various tissues during inflammation and infection .
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In vivo mechanisms involved in enhanced protection utilizing an Fc receptor-targeted mucosal vaccine platform in a bacterial vaccine and challenge model. Infect Immun 2014; 83:77-89. [PMID: 25312957 DOI: 10.1128/iai.02289-14] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Targeting antigens (Ag) to Fcγ receptors (FcγR) intranasally (i.n.) enhances immunogenicity and protection against intracellular and extracellular pathogens. Specifically, we have demonstrated that targeting fixed (inactivated) Francisella tularensis (iFT) organisms to FcR in mice i.n., with MAb-iFT immune complexes, enhances F. tularensis-specific immune responses and protection against F. tularensis challenge. Furthermore, traditional adjuvant is not required. In addition, we have demonstrated that the increased immunogenicity following the targeting of iFT to FcR is due, in part, to enhanced dendritic cell (DC) maturation, enhanced internalization, and processing and presentation of iFT by DCs, as well as neonatal FcR (FcRn)-enhanced trafficking of iFT from the nasal passage to the nasal mucosa-associated lymphoid tissue (NALT). Using this immunization and challenge model, we expanded on these studies to identify specific in vivo immune responses impacted and enhanced by FcR targeting of iFT i.n. Specifically, the results of this study demonstrate for the first time that targeting iFT to FcR increases the frequency of activated DCs within the lungs of MAb-iFT-immunized mice subsequent to F. tularensis LVS challenge. In addition, the frequency and number of gamma interferon (IFN-γ)-secreting effector memory (EM) CD4(+) T cells elicited by F. tularensis infection (postimmunization) is increased in an interleukin 12 (IL-12)-dependent manner. In summary, these studies build significantly upon previously published work utilizing this vaccine platform. We have identified a number of additional mechanisms by which this novel, adjuvant-independent, FcR-targeted mucosal vaccine approach enhances immunity and protection against infection, while further validating its potential as a universal vaccine platform against mucosal pathogens.
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20
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Pitzalis C, Jones GW, Bombardieri M, Jones SA. Ectopic lymphoid-like structures in infection, cancer and autoimmunity. Nat Rev Immunol 2014; 14:447-62. [PMID: 24948366 DOI: 10.1038/nri3700] [Citation(s) in RCA: 472] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ectopic lymphoid-like structures often develop at sites of inflammation where they influence the course of infection, autoimmune disease, cancer and transplant rejection. These lymphoid aggregates range from tight clusters of B cells and T cells to highly organized structures that comprise functional germinal centres. Although the mechanisms governing ectopic lymphoid neogenesis in human pathology remain poorly defined, the presence of ectopic lymphoid-like structures within inflamed tissues has been linked to both protective and deleterious outcomes in patients. In this Review, we discuss investigations in both experimental model systems and patient cohorts to provide a perspective on the formation and functions of ectopic lymphoid-like structures in human pathology, with particular reference to the clinical implications and the potential for therapeutic targeting.
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Affiliation(s)
- Costantino Pitzalis
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London, School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Gareth W Jones
- Cardiff Institute for Infection and Immunity, The School of Medicine, Cardiff University, The Tenovus Building, Heath Campus, Cardiff CF14 4XN, Wales, UK
| | - Michele Bombardieri
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London, School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Simon A Jones
- Cardiff Institute for Infection and Immunity, The School of Medicine, Cardiff University, The Tenovus Building, Heath Campus, Cardiff CF14 4XN, Wales, UK
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21
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Jordan M, Haczku A. Autoreactive bronchus-associated lymphoid tissue in interstitial lung disease: friend or foe? Am J Respir Cell Mol Biol 2013; 48:397-8. [PMID: 23544886 DOI: 10.1165/rcmb.2013-0011ed] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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22
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IKKβ in myeloid cells controls the host response to lethal and sublethal Francisella tularensis LVS infection. PLoS One 2013; 8:e54124. [PMID: 23349802 PMCID: PMC3551972 DOI: 10.1371/journal.pone.0054124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Accepted: 12/10/2012] [Indexed: 11/26/2022] Open
Abstract
Background The NF-κB activating kinases, IKKα and IKKβ, are key regulators of inflammation and immunity in response to infection by a variety of pathogens. Both IKKα and IKKβ have been reported to modulate either pro- or anti- inflammatory programs, which may be specific to the infectious organism or the target tissue. Here, we analyzed the requirements for the IKKs in myeloid cells in vivo in response to Francisella tularensis Live Vaccine Strain (Ft. LVS) infection. Methods and Principal Findings In contrast to prior reports in which conditional deletion of IKKβ in the myeloid lineage promoted survival and conferred resistance to an in vivo group B streptococcus infection, we show that mice with a comparable conditional deletion (IKKβ cKO) succumb more rapidly to lethal Ft. LVS infection and are unable to control bacterial growth at sublethal doses. Flow cytometry analysis of hepatic non-parenchymal cells from infected mice reveals that IKKβ inhibits M1 classical macrophage activation two days post infection, which has the collateral effect of suppressing IFN-γ+ CD8+ T cells. Despite this early enhanced inflammation, IKKβ cKO mice are unable to control infection; and this coincides with a shift toward M2a polarized macrophages. In comparison, we find that myeloid IKKα is dispensable for survival and bacterial control. However, both IKKα and IKKβ have effects on hepatic granuloma development. IKKα cKO mice develop fewer, but well-contained granulomas that accumulate excess necrotic cells after 9 days of infection; while IKKβ cKO mice develop numerous micro-granulomas that are less well contained. Conclusions Taken together our findings reveal that unlike IKKα, IKKβ has multiple, contrasting roles in this bacterial infection model by acting in an anti-inflammatory capacity at early times towards sublethal Ft. LVS infection; but in spite of this, macrophage IKKβ is also a critical effector for host survival and efficient pathogen clearance.
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23
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Tertiary lymphoid organs in infection and autoimmunity. Trends Immunol 2012; 33:297-305. [PMID: 22622061 PMCID: PMC7106385 DOI: 10.1016/j.it.2012.04.006] [Citation(s) in RCA: 265] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 04/17/2012] [Accepted: 04/17/2012] [Indexed: 01/07/2023]
Abstract
The lymph nodes (LNs) and spleen have an optimal structure that allows the interaction between T cells, B cells and antigen-presenting dendritic cells (DCs) on a matrix made up by stromal cells. Such a highly organized structure can also be formed in tertiary lymphoid organs (TLOs) at sites of infection or chronic immune stimulation. This review focuses on the molecular mechanisms of TLO formation and maintenance, the controversies surrounding the nature of the inducing events, and the functions of these structures in infection, transplantation and autoimmunity.
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Improvement of immunogenicity of meningococcal lipooligosaccharide by coformulation with lipidated transferrin-binding protein B in liposomes: implications for vaccine development. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2012; 19:711-22. [PMID: 22441387 DOI: 10.1128/cvi.05683-11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Among various meningococcal antigens, lipooligosaccharide (LOS) and recombinant lipidated transferrin-binding protein B (rlip-TbpB) are considered to be putative vaccine candidates against group B Neisseria meningitidis. In the present work, we report the development of a new liposome-based vaccine formulation containing both rlip-TbpB and L8 LOS. The endotoxic activity of the liposomal LOS was evaluated in vitro using the Limulus Amebocyte Lysate assay and compared to the endotoxic activity of free LOS. Above a 250:1 lipid/LOS molar ratio, liposomes were shown to effectively detoxify the LOS as the endotoxic activity of the LOS was reduced by more than 99%. Immunogenicity studies in rabbits showed that the presence of rlip-TbpB dramatically increased the immunogenicity of the LOS. While the formulation raised a strong anti-TbpB response, it elicited a higher anti-LOS IgG level than the liposomal LOS alone. Sera from rabbits immunized with rlip-TbpB/liposomal LOS displayed increased ability to recognize LOS on live bacteria expressing the L8 immunotype and increased anti-LOS-specific bactericidal activity compared to sera from rabbits immunized with liposomal LOS alone. Measurement of interleukin-8 (IL-8) produced by HEK293 cells transfected with Toll-like receptor (TLR) after stimulation with rlip-TbpB showed that the protein is a TLR2 agonist, which is in accordance with the structure of its lipid. Furthermore, an in vivo study demonstrated that the lipid moiety is not only required for its adjuvant effect but also has to be linked to the protein. Overall, the rlip-TbpB/LOS liposomal formulation was demonstrated to induce an effective anti-LOS response due to the adjuvant effect of rlip-TbpB on LOS.
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25
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Rangel-Moreno J, Carragher DM, de la Luz Garcia-Hernandez M, Hwang JY, Kusser K, Hartson L, Kolls JK, Khader SA, Randall TD. The development of inducible bronchus-associated lymphoid tissue depends on IL-17. Nat Immunol 2011; 12:639-46. [PMID: 21666689 PMCID: PMC3520063 DOI: 10.1038/ni.2053] [Citation(s) in RCA: 320] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 05/12/2011] [Indexed: 12/11/2022]
Abstract
Ectopic or tertiary lymphoid tissues, such as inducible bronchus-associated lymphoid tissue (iBALT), form in nonlymphoid organs after local infection or inflammation. However, the initial events that promote this process remain unknown. Here we show that iBALT formed in mouse lungs as a consequence of pulmonary inflammation during the neonatal period. Although we found CD4(+)CD3(-) lymphoid tissue-inducer cells (LTi cells) in neonatal lungs, particularly after inflammation, iBALT was formed in mice that lacked LTi cells. Instead, we found that interleukin 17 (IL-17) produced by CD4(+) T cells was essential for the formation of iBALT. IL-17 acted by promoting lymphotoxin-α-independent expression of the chemokine CXCL13, which was important for follicle formation. Our results suggest that IL-17-producing T cells are critical for the development of ectopic lymphoid tissues.
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Affiliation(s)
- Javier Rangel-Moreno
- Department of Medicine, Division of Allergy Immunology and Rheumatology, University of Rochester Medical Center, Rochester, New York, USA
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26
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Tosiek MJ, Gruber AD, Bader SR, Mauel S, Hoymann HG, Prettin S, Tschernig T, Buer J, Gereke M, Bruder D. CD4+CD25+Foxp3+ regulatory T cells are dispensable for controlling CD8+ T cell-mediated lung inflammation. THE JOURNAL OF IMMUNOLOGY 2011; 186:6106-18. [PMID: 21518973 DOI: 10.4049/jimmunol.1000632] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Every person harbors a population of potentially self-reactive lymphocytes controlled by tightly balanced tolerance mechanisms. Failures in this balance evoke immune activation and autoimmunity. In this study, we investigated the contribution of self-reactive CD8(+) T lymphocytes to chronic pulmonary inflammation and a possible role for naturally occurring CD4(+)CD25(+)Foxp3(+) regulatory T cells (nTregs) in counterbalancing this process. Using a transgenic murine model for autoimmune-mediated lung disease, we demonstrated that despite pulmonary inflammation, lung-specific CD8(+) T cells can reside quiescently in close proximity to self-antigen. Whereas self-reactive CD8(+) T cells in the inflamed lung and lung-draining lymph nodes downregulated the expression of effector molecules, those located in the spleen appeared to be partly Ag-experienced and displayed a memory-like phenotype. Because ex vivo-reisolated self-reactive CD8(+) T cells were very well capable of responding to the Ag in vitro, we investigated a possible contribution of nTregs to the immune control over autoaggressive CD8(+) T cells in the lung. Notably, CD8(+) T cell tolerance established in the lung depends only partially on the function of nTregs, because self-reactive CD8(+) T cells underwent only biased activation and did not acquire effector function after nTreg depletion. However, although transient ablation of nTregs did not expand the population of self-reactive CD8(+) T cells or exacerbate the disease, it provoked rapid accumulation of activated CD103(+)CD62L(lo) Tregs in bronchial lymph nodes, a finding suggesting an adaptive phenotypic switch in the nTreg population that acts in concert with other yet-undefined mechanisms to prevent the detrimental activation of self-reactive CD8(+) T cells.
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Affiliation(s)
- Milena J Tosiek
- Immune Regulation Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany
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27
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Blank F, Stumbles P, von Garnier C. Opportunities and challenges of the pulmonary route for vaccination. Expert Opin Drug Deliv 2011; 8:547-63. [PMID: 21438741 DOI: 10.1517/17425247.2011.565326] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
INTRODUCTION The respiratory tract is an attractive target for the delivery of vaccine antigens. Potential advantages of drug delivery by means of the pulmonary route include accessibility, non-invasiveness, ease of administration, and the possibility to reach an elaborate mucosal network of antigen-presenting cells. AREAS COVERED This review discusses current pulmonary vaccination strategies and their advantages and disadvantages. EXPERT OPINION To improve efficiency of vaccination and develop new strategies, a well-founded knowledge about composition and characterization of antigen-presenting cell populations throughout the respiratory tract is essential. In particular, respiratory tract dendritic cells, as key antigen-presenting cells in the lung, constitute an ideal target for vaccine delivery. Furthermore, particle size is a key factor when designing new inhalable vaccines, as size determines not only deposition in different respiratory tract compartments, but also how an antigen and its carrier will interact with lung tissue components and immune cells. An increased knowledge of different respiratory tract antigen-presenting cell populations and their interactions with other components of the immune system will enable new targeting strategies to improve the efficacy of pulmonary vaccination.
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Affiliation(s)
- Fabian Blank
- Bern University, Pulmonary Medicine, Department of Clinical Research, Murtenstrasse 50, CH-3010 Berne, Switzerland.
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Huang MTH, Mortensen BL, Taxman DJ, Craven RR, Taft-Benz S, Kijek TM, Fuller JR, Davis BK, Allen IC, Brickey WJ, Gris D, Wen H, Kawula TH, Ting JPY. Deletion of ripA alleviates suppression of the inflammasome and MAPK by Francisella tularensis. THE JOURNAL OF IMMUNOLOGY 2010; 185:5476-85. [PMID: 20921527 DOI: 10.4049/jimmunol.1002154] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Francisella tularensis is a facultative intracellular pathogen and potential biothreat agent. Evasion of the immune response contributes to the extraordinary virulence of this organism although the mechanism is unclear. Whereas wild-type strains induced low levels of cytokines, an F. tularensis ripA deletion mutant (LVSΔripA) provoked significant release of IL-1β, IL-18, and TNF-α by resting macrophages. IL-1β and IL-18 secretion was dependent on inflammasome components pyrin-caspase recruitment domain/apoptotic speck-containing protein with a caspase recruitment domain and caspase-1, and the TLR/IL-1R signaling molecule MyD88 was required for inflammatory cytokine synthesis. Complementation of LVSΔripA with a plasmid encoding ripA restored immune evasion. Similar findings were observed in a human monocytic line. The presence of ripA nearly eliminated activation of MAPKs including ERK1/2, JNK, and p38, and pharmacologic inhibitors of these three MAPKs reduced cytokine induction by LVSΔripA. Animals infected with LVSΔripA mounted a stronger IL-1β and TNF-α response than that of mice infected with wild-type live vaccine strain. This analysis revealed novel immune evasive mechanisms of F. tularensis.
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Affiliation(s)
- Max Tze-Han Huang
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599-7290, USA
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