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Zong X, Liu P, Wang Z, Zhu H, Zhong C, Zhong P, Jiang H, Liu J, Ma Z, Liu X, Liu R, Ding Y. Structural insights into the binding of nanobodies to the Staphylococcal enterotoxin B. Int J Biol Macromol 2024; 276:133957. [PMID: 39029852 DOI: 10.1016/j.ijbiomac.2024.133957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/21/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
Staphylococcal Enterotoxin Type B (SEB), produced by Staphylococcus aureus bacteria, is notorious for inducing severe food poisoning and toxic shock syndrome. While nanobody-based treatments hold promises for combating SEB-induced diseases, the lack of structural information between SEB and nanobodies has hindered the development of nanobody-based therapeutics. Here, we present crystal structures of SEB-Nb3, SEB-Nb6, SEB-Nb8, SEB-Nb11, and SEB-Nb20 at resolutions ranging from 1.59 Å to 2.33 Å. Crystallographic analysis revealed that Nb3, Nb8, Nb11, and Nb20 bind to SEB at the T-cell receptor (TCR) interface, while Nb6 binds at the major histocompatibility complex (MHC) interface, suggesting their potential to inhibit SEB function by disrupting interactions with TCR or MHC molecules. Molecular biological analyses confirmed the thermodynamic and kinetic parameters of Nb3, Nb5, Nb6, Nb8, Nb11, Nb15, Nb18, and Nb20 to SEB. The competitive inhibition was further confirmed by cell-based experiments demonstrating nanobody neutralization. These findings elucidate the structural basis for developing specific nanobodies to neutralize SEB threats, providing crucial insights into the underlying mechanisms and offering significant assistance for further optimization towards future therapeutic strategies.
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Affiliation(s)
- Xin Zong
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Peng Liu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Ziying Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Haoran Zhu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Chao Zhong
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Peiyu Zhong
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - He Jiang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Jiayuan Liu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Zhiqiang Ma
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Xihuan Liu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Rui Liu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China; Quzhou Fudan Institute, Quzhou, Zhejiang 324002, China.
| | - Yu Ding
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China; Quzhou Fudan Institute, Quzhou, Zhejiang 324002, China.
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Shi Y, Strasser A, Green DR, Latz E, Mantovani A, Melino G. Legacy of the discovery of the T-cell receptor: 40 years of shaping basic immunology and translational work to develop novel therapies. Cell Mol Immunol 2024; 21:790-797. [PMID: 38822079 PMCID: PMC11214623 DOI: 10.1038/s41423-024-01168-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Accepted: 04/18/2024] [Indexed: 06/02/2024] Open
Affiliation(s)
- Yufang Shi
- The Fourth Affiliated Hospital of Soochow University, Institutes for Translational Medicine, State Key Laboratory of Radiation Medicine and Protection, Medical College of Soochow University, Soochow University, Suzhou, 215000, China.
| | - Andreas Strasser
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Eicke Latz
- Institute of Innate Immunity, University of Bonn, Bonn, 53127, Germany
- German Center for Neurodegenerative Diseases (DZNE), Bonn, 53175, Germany
| | | | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
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3
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Tuffs SW, Dufresne K, Rishi A, Walton NR, McCormick JK. Novel insights into the immune response to bacterial T cell superantigens. Nat Rev Immunol 2024; 24:417-434. [PMID: 38225276 DOI: 10.1038/s41577-023-00979-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2023] [Indexed: 01/17/2024]
Abstract
Bacterial T cell superantigens (SAgs) are a family of microbial exotoxins that function to activate large numbers of T cells simultaneously. SAgs activate T cells by direct binding and crosslinking of the lateral regions of MHC class II molecules on antigen-presenting cells with T cell receptors (TCRs) on T cells; these interactions alter the normal TCR-peptide-MHC class II architecture to activate T cells in a manner that is independent of the antigen specificity of the TCR. SAgs have well-recognized, central roles in human diseases such as toxic shock syndrome and scarlet fever through their quantitative effects on the T cell response; in addition, numerous other consequences of SAg-driven T cell activation are now being recognized, including direct roles in the pathogenesis of endocarditis, bloodstream infections, skin disease and pharyngitis. In this Review, we summarize the expanding family of bacterial SAgs and how these toxins can engage highly diverse adaptive immune receptors. We highlight recent findings regarding how SAg-driven manipulation of the adaptive immune response may operate in multiple human diseases, as well as contributing to the biology and life cycle of SAg-producing bacterial pathogens.
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Affiliation(s)
- Stephen W Tuffs
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada
| | - Karine Dufresne
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada
| | - Aanchal Rishi
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada
| | - Nicholas R Walton
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada
| | - John K McCormick
- Department of Microbiology and Immunology, University of Western Ontario, London, Ontario, Canada.
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4
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Burns JC. The etiologies of Kawasaki disease. J Clin Invest 2024; 134:e176938. [PMID: 38426498 PMCID: PMC10904046 DOI: 10.1172/jci176938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024] Open
Abstract
Kawasaki disease (KD) is a systemic vasculitis that affects young children and can result in coronary artery aneurysms. The etiology is currently unknown, but new clues from the epidemiology of KD in Japan, the country of highest incidence, are beginning to shed light on what may trigger this acute inflammatory condition. Additional clues from the global changes in KD incidence during the COVID-19 pandemic, coupled with a new birth cohort study from Japan, point to the potential role of person-to-person transmission of an infectious agent. However, the rising incidence of KD in Japan, with coherent waves across the entire country, points to an increasing intensity of exposure that cannot be explained by person-to-person spread. This Review discusses new and historical observations that guide us toward a better understanding of KD etiology and explores hypotheses and interpretations that can provide direction for future investigations. Once the etiology of KD is determined, accurate diagnostic tests will become available, and new, less expensive, and more effective targeted therapies will likely be possible. Clearly, solving the mystery of the etiologies of KD remains a priority for pediatric research.
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5
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Wang P, Fredj Z, Zhang H, Rong G, Bian S, Sawan M. Blocking Superantigen-Mediated Diseases: Challenges and Future Trends. J Immunol Res 2024; 2024:2313062. [PMID: 38268531 PMCID: PMC10807946 DOI: 10.1155/2024/2313062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/15/2023] [Accepted: 12/30/2023] [Indexed: 01/26/2024] Open
Abstract
Superantigens are virulence factors secreted by microorganisms that can cause various immune diseases, such as overactivating the immune system, resulting in cytokine storms, rheumatoid arthritis, and multiple sclerosis. Some studies have demonstrated that superantigens do not require intracellular processing and instated bind as intact proteins to the antigen-binding groove of major histocompatibility complex II on antigen-presenting cells, resulting in the activation of T cells with different T-cell receptor Vβ and subsequent overstimulation. To combat superantigen-mediated diseases, researchers have employed different approaches, such as antibodies and simulated peptides. However, due to the complex nature of superantigens, these approaches have not been entirely successful in achieving optimal therapeutic outcomes. CD28 interacts with members of the B7 molecule family to activate T cells. Its mimicking peptide has been suggested as a potential candidate to block superantigens, but it can lead to reduced T-cell activity while increasing the host's infection risk. Thus, this review focuses on the use of drug delivery methods to accurately target and block superantigens, while reducing the adverse effects associated with CD28 mimic peptides. We believe that this method has the potential to provide an effective and safe therapeutic strategy for superantigen-mediated diseases.
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Affiliation(s)
- Pengbo Wang
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou 310030, China
| | - Zina Fredj
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou 310030, China
| | - Hongyong Zhang
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou 310030, China
| | - Guoguang Rong
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou 310030, China
| | - Sumin Bian
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou 310030, China
| | - Mohamad Sawan
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou 310030, China
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Kuwatani M, Sakamoto N. Promising Highly Targeted Therapies for Cholangiocarcinoma: A Review and Future Perspectives. Cancers (Basel) 2023; 15:3686. [PMID: 37509347 PMCID: PMC10378186 DOI: 10.3390/cancers15143686] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
To overcome the poor prognosis of cholangiocarcinoma (CCA), highly targeted therapies, such as antibody-drug conjugates (ADCs), photodynamic therapy (PDT) with/without systemic chemotherapy, and experimental photoimmunotherapy (PIT), have been developed. Three preclinical trials have investigated the use of ADCs targeting specific antigens, namely HER2, MUC1, and glypican-1 (GPC1), for CCA. Trastuzumab emtansine demonstrated higher antiproliferative activity in CCA cells expressing higher levels of HER2. Similarly, "staphylococcal enterotoxin A-MUC1 antibody" and "anti-GPC1 antibody-monomethyl auristatin F" conjugates showed anticancer activity. PDT is effective in areas where appropriate photosensitizers and light coexist. Its mechanism involves photosensitizer excitation and subsequent reactive oxygen species production in cancer cells upon irradiation. Hematoporphyrin derivatives, temoporfin, phthalocyanine-4, talaporfin, and chlorine e6 derivatives have mainly been used clinically and preclinically in bile duct cancer. Currently, new forms of photosensitizers with nanotechnology and novel irradiation catheters are being developed. PIT is the most novel anti-cancer therapy developed in 2011 that selectively kills targeted cancer cells using a unique photosensitizer called "IR700" conjugated with an antibody specific for cancer cells. PIT is currently in the early stages of development for identifying appropriate CCA cell targets and irradiation devices. Future human and artificial intelligence collaboration has potential for overcoming challenges related to identifying universal CCA cell targets. This could pave the way for highly targeted therapies for CCA, such as ADC, PDT, and PIT.
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Affiliation(s)
- Masaki Kuwatani
- Department of Gastroenterology and Hepatology, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo 060-8648, Japan
| | - Naoya Sakamoto
- Department of Gastroenterology and Hepatology, Hokkaido University Hospital, North 14, West 5, Kita-ku, Sapporo 060-8648, Japan
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Hughes AC, Kirkland M, Du W, Rasooly R, Hernlem B, Tam C, Zhang Y, He X. Development of Thermally Stable Nanobodies for Detection and Neutralization of Staphylococcal Enterotoxin B. Toxins (Basel) 2023; 15:400. [PMID: 37368700 DOI: 10.3390/toxins15060400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/02/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
In this study, sixteen unique staphylococcal enterotoxin B (SEB)-reactive nanobodies (nbs), including ten monovalent and six bivalent nbs, were developed. All characterized nbs were highly specific for SEB and did not cross-react with other staphylococcal enterotoxins (SE). Several formats of highly sensitive enzyme-linked immunosorbent assays (ELISAs) were established using SEB nbs and a polyclonal antibody (pAb). The lowest limit of detection (LOD) reached 50 pg/mL in PBS. When applied to an ELISA to detect SEB-spiked milk (a commonly contaminated foodstuff), a LOD as low as 190 pg/mL was obtained. The sensitivity of ELISA was found to increase concurrently with the valency of nbs used in the assay. In addition, a wide range of thermal tolerance was observed among the sixteen nbs, with a subset of nbs, SEB-5, SEB-9, and SEB-62, retaining activity even after exposure to 95 °C for 10 min, whereas the conventional monoclonal and polyclonal antibodies exhibited heat-labile properties. Several nbs demonstrated a long shelf-life, with one nb (SEB-9) retaining 93% of its activity after two weeks of storage at room temperature. In addition to their usage in toxin detection, eleven out of fifteen nbs were capable of neutralizing SEB's super-antigenic activity, demonstrated by their inhibition on IL-2 expression in an ex vivo human PBMC assay. Compared to monoclonal and polyclonal antibodies, the nbs are relatively small, thermally stable, and easy to produce, making them useful in applications for sensitive, specific, and cost-effective detection and management of SEB contamination in food products.
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Affiliation(s)
- Anna C Hughes
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Marina Kirkland
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Wenxian Du
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Reuven Rasooly
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Bradley Hernlem
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Christina Tam
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Yuzhu Zhang
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
| | - Xiaohua He
- Western Regional Research Center United States Department of Agriculture, Agricultural Research Service, 800 Buchanan St., Albany, CA 94710, USA
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Duarte A, Montagna DR, Pastorini M, Alemán M. Apoptosis-mediated inhibition of human T-cell acute lymphoblastic leukemia upon treatment with Staphylococus Aureus enterotoxin-superantigen. Front Immunol 2023; 14:1176432. [PMID: 37377961 PMCID: PMC10291079 DOI: 10.3389/fimmu.2023.1176432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
Patients with relapsed T cell acute lymphoblastic leukemia (T-ALL) have limited therapeutic options and poor prognosis. The finding of efficient strategies against this refractory neoplasm is a medical priority. Superantigens (SAgs) are viral and bacterial proteins that bind to major histocompatibility complex class II molecules as unprocessed proteins and subsequently interact with a high number of T cells expressing particular T cell receptor Vβ chains. Although on mature T cells, SAgs usually trigger massive cell proliferation producing deleterious effects on the organism, in contrast, on immature T cells, they may trigger their death by apoptosis. On this basis, it was hypothesized that SAgs could also induce apoptosis in neoplastic T cells that are usually immature cells that probably conserve their particular Vβ chains. In this work, we investigated the effect of the SAg Staphylococcus aureus enterotoxin E (SEE) (that specifically interacts with cells that express Vβ8 chain), on human Jurkat T- leukemia line, that expresses Vβ8 in its T receptor and it is a model of the highly aggressive recurrent T-ALL. Our results demonstrated that SEE could induce apoptosis in Jurkat cells in vitro. The induction of apoptosis was specific, correlated to the down regulation of surface Vβ8 TCR expression and was triggered, at least in part, through the Fas/FasL extrinsic pathway. The apoptotic effect induced by SEE on Jurkat cells was therapeutically relevant. In effect, upon transplantation of Jurkat cells in the highly immunodeficient NSG mice, SEE treatment reduced dramatically tumor growth, decreased the infiltration of neoplastic cells in the bloodstream, spleen and lymph nodes and, most importantly, increased significantly the survival of mice. Taken together, these results raise the possibility that this strategy can be, in the future, a useful option for the treatment of recurrent T-ALL.
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Affiliation(s)
- Alejandra Duarte
- Institute of Experimental Medicine, National Council of Scientific and Technical Research, National Medicine Academy (IMEX-CONICET-ANM), Buenos Aires, Argentina
- Fundación Héctor Alejandro (H.A.) Barceló, Instituto Universitario de Ciencias de la Salud, Buenos Aires, Argentina
| | - Daniela R. Montagna
- Institute of Experimental Medicine, National Council of Scientific and Technical Research, National Medicine Academy (IMEX-CONICET-ANM), Buenos Aires, Argentina
| | - Mercedes Pastorini
- Institute of Experimental Medicine, National Council of Scientific and Technical Research, National Medicine Academy (IMEX-CONICET-ANM), Buenos Aires, Argentina
| | - Mercedes Alemán
- Institute of Experimental Medicine, National Council of Scientific and Technical Research, National Medicine Academy (IMEX-CONICET-ANM), Buenos Aires, Argentina
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Shepherd FR, Davies K, Miners KL, Llewellyn-Lacey S, Kollnberger S, Redman JE, Grant MM, Ladell K, Price DA, McLaren JE. The superantigens SpeC and TSST-1 specifically activate TRBV12-3/12-4 + memory T cells. Commun Biol 2023; 6:78. [PMID: 36670205 PMCID: PMC9854414 DOI: 10.1038/s42003-023-04420-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/04/2023] [Indexed: 01/22/2023] Open
Abstract
Severe bacterial or viral infections can induce a state of immune hyperactivation that can culminate in a potentially lethal cytokine storm. The classic example is toxic shock syndrome, a life-threatening complication of Staphylococcus aureus or Streptococcus pyogenes infection, which is driven by potent toxins known as superantigens (SAgs). SAgs are thought to promote immune evasion via the promiscuous activation of T cells, which subsequently become hyporesponsive, and act by cross-linking major histocompatibility complex class II molecules on antigen-presenting cells to particular β-chain variable (TRBV) regions of αβ T cell receptors (TCRs). Although some of these interactions have been defined previously, our knowledge of SAg-responsive TRBV regions is incomplete. In this study, we found that CD4+ and CD8+ T cells expressing TRBV12-3/12-4+ TCRs were highly responsive to streptococcal pyrogenic exotoxin C (SpeC) and toxic shock syndrome toxin-1 (TSST-1). In particular, SpeC and TSST-1 specifically induced effector cytokine production and the upregulation of multiple coinhibitory receptors among TRBV12-3/12-4+ CD4+ and CD8+ memory T cells, and importantly, these biological responses were dependent on human leukocyte antigen (HLA)-DR. Collectively, these data provided evidence of functionally determinative and therapeutically relevant interactions between SpeC and TSST-1 and CD4+ and CD8+ memory T cells expressing TRBV12-3/12-4+ TCRs, mediated via HLA-DR.
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Affiliation(s)
- Freya R. Shepherd
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Kate Davies
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Kelly L. Miners
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Sian Llewellyn-Lacey
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Simon Kollnberger
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - James E. Redman
- grid.5600.30000 0001 0807 5670School of Chemistry, Cardiff University, Cardiff, UK
| | - Melissa M. Grant
- grid.6572.60000 0004 1936 7486School of Dentistry, Institute of Clinical Sciences, University of Birmingham, Birmingham, UK
| | - Kristin Ladell
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - David A. Price
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK ,grid.5600.30000 0001 0807 5670Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff, UK
| | - James E. McLaren
- grid.5600.30000 0001 0807 5670Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
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Haeryfar SMM. Finding a Mentor While "Storm" Chasing with Howard Young. J Interferon Cytokine Res 2022; 42:658-661. [PMID: 36070592 DOI: 10.1089/jir.2022.0157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Canada.,Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Canada.,Division of General Surgery, Department of Surgery, Western University, London, Canada.,Lawson Health Research Institute, London, Canada
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11
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Noli Truant S, Redolfi DM, Sarratea MB, Malchiodi EL, Fernández MM. Superantigens, a Paradox of the Immune Response. Toxins (Basel) 2022; 14:toxins14110800. [PMID: 36422975 PMCID: PMC9692936 DOI: 10.3390/toxins14110800] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 11/19/2022] Open
Abstract
Staphylococcal enterotoxins are a wide family of bacterial exotoxins with the capacity to activate as much as 20% of the host T cells, which is why they were called superantigens. Superantigens (SAgs) can cause multiple diseases in humans and cattle, ranging from mild to life-threatening infections. Almost all S. aureus isolates encode at least one of these toxins, though there is no complete knowledge about how their production is triggered. One of the main problems with the available evidence for these toxins is that most studies have been conducted with a few superantigens; however, the resulting characteristics are attributed to the whole group. Although these toxins share homology and a two-domain structure organization, the similarity ratio varies from 20 to 89% among different SAgs, implying wide heterogeneity. Furthermore, every attempt to structurally classify these proteins has failed to answer differential biological functionalities. Taking these concerns into account, it might not be appropriate to extrapolate all the information that is currently available to every staphylococcal SAg. Here, we aimed to gather the available information about all staphylococcal SAgs, considering their functions and pathogenicity, their ability to interact with the immune system as well as their capacity to be used as immunotherapeutic agents, resembling the two faces of Dr. Jekyll and Mr. Hyde.
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12
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Kratzer B, Schlax LC, Gattinger P, Waidhofer‐Söllner P, Trapin D, Tauber PA, Sehgal ANA, Körmöczi U, Rottal A, Feichter M, Oberhofer T, Grabmeier‐Pfistershammer K, Borochova K, Dorofeeva Y, Tulaeva I, Weber M, Mühl B, Kropfmüller A, Negrin B, Kundi M, Valenta R, Pickl WF. Combined assessment of S- and N-specific IL-2 and IL-13 secretion and CD69 neo-expression for discrimination of post-infection and post-vaccination cellular SARS-CoV-2-specific immune response. Allergy 2022; 77:3408-3425. [PMID: 35690994 PMCID: PMC9348018 DOI: 10.1111/all.15406] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 05/20/2022] [Accepted: 05/30/2022] [Indexed: 01/28/2023]
Abstract
BACKGROUND Antibody-based tests are available for measuring SARS-CoV-2-specific immune responses but fast T-cell assays remain scarce. Robust T cell-based tests are needed to differentiate specific cellular immune responses after infection from those after vaccination. METHODS One hundred seventeen individuals (COVID-19 convalescent patients: n = 40; SARS-CoV-2 vaccinees: n = 41; healthy controls: n = 36) were evaluated for SARS-CoV-2-specific cellular immune responses (proliferation, Th1, Th2, Th17, and inflammatory cytokines, activation-induced marker [AIM] expression) by incubating purified peripheral blood mononuclear cells (PBMC) or whole blood (WB) with SARS-CoV-2 peptides (S, N, or M), vaccine antigens (tetanus toxoid, tick borne encephalitis virus) or polyclonal stimuli (Staphylococcal enterotoxin, phytohemagglutinin). RESULTS N-peptide mix stimulation of WB identified the combination of IL-2 and IL-13 secretion as superior to IFN-γ secretion to discriminate between COVID-19-convalescent patients and healthy controls (p < .0001). Comparable results were obtained with M- or S-peptides, the latter almost comparably recalled IL-2, IFN-γ, and IL-13 responses in WB of vaccinees. Analysis 10 months as opposed to 10 weeks after COVID-19, but not allergic disease status, positively correlated with IL-13 recall responses. WB cytokine responses correlated with cytokine and proliferation responses of PBMC. Antigen-induced neo-expression of the C-type lectin CD69 on CD4+ (p < .0001) and CD8+ (p = .0002) T cells informed best about the SARS-CoV-2 exposure status with additional benefit coming from CD25 upregulation. CONCLUSION Along with N- and S-peptide-induced IL-2 and CD69 neo-expression, we suggest to include the type 2 cytokine IL-13 as T-cellular recall marker for SARS-CoV-2 specific T-cellular immune responses after infection and vaccination.
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Affiliation(s)
- Bernhard Kratzer
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Larissa C. Schlax
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Pia Gattinger
- Medical University of ViennaCenter for Pathophysiology, Infectiology and ImmunologyDepartment of Pathophysiology and Allergy ResearchViennaAustria
| | - Petra Waidhofer‐Söllner
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Doris Trapin
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Peter A. Tauber
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Al Nasar Ahmed Sehgal
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Ulrike Körmöczi
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Arno Rottal
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Melanie Feichter
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | - Teresa Oberhofer
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria
| | | | - Kristina Borochova
- Medical University of ViennaCenter for Pathophysiology, Infectiology and ImmunologyDepartment of Pathophysiology and Allergy ResearchViennaAustria
| | - Yulia Dorofeeva
- Medical University of ViennaCenter for Pathophysiology, Infectiology and ImmunologyDepartment of Pathophysiology and Allergy ResearchViennaAustria
| | - Inna Tulaeva
- Medical University of ViennaCenter for Pathophysiology, Infectiology and ImmunologyDepartment of Pathophysiology and Allergy ResearchViennaAustria,I. M. Sechenov First Moscow State Medical University (Sechenov University)Department of Clinical Immunology and AllergologyLaboratory for ImmunopathologyMoscowRussia
| | - Milena Weber
- Medical University of ViennaCenter for Pathophysiology, Infectiology and ImmunologyDepartment of Pathophysiology and Allergy ResearchViennaAustria
| | | | | | - Bettina Negrin
- Österreichische Gesundheitskasse, Klinikum PeterhofBadenAustria
| | - Michael Kundi
- Medical University of ViennaCenter for Public HealthDepartment for Environmental HealthViennaAustria
| | - Rudolf Valenta
- Medical University of ViennaCenter for Pathophysiology, Infectiology and ImmunologyDepartment of Pathophysiology and Allergy ResearchViennaAustria,I. M. Sechenov First Moscow State Medical University (Sechenov University)Department of Clinical Immunology and AllergologyLaboratory for ImmunopathologyMoscowRussia,NRC Institute of Immunology FMBA of RussiaMoscowRussia,Karl Landsteiner University of Health SciencesKremsAustria
| | - Winfried F. Pickl
- Medical University of ViennaCenter for PathophysiologyInfectiology and ImmunologyInstitute of ImmunologyViennaAustria,Karl Landsteiner University of Health SciencesKremsAustria
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13
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Hamdy A, Leonardi A. Superantigens and SARS-CoV-2. Pathogens 2022; 11:pathogens11040390. [PMID: 35456065 PMCID: PMC9026686 DOI: 10.3390/pathogens11040390] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/03/2022] [Accepted: 03/22/2022] [Indexed: 12/31/2022] Open
Abstract
It has been posited SARS-CoV-2 contains at least one unique superantigen-like motif not found in any other SARS or endemic coronaviruses. Superantigens are potent antigens that can send the immune system into overdrive. SARS-CoV-2 causes many of the biological and clinical consequences of a superantigen, and, in the context of reinfection and waning immunity, it is important to better understand the impact of a widely circulating, airborne pathogen that may be a superantigen, superantigen-like or trigger a superantigenic host response. Urgent research is needed to better understand the long-term risks being taken by governments whose policies enable widespread transmission of a potential superantigenic pathogen, and to more clearly define the vaccination and public health policies needed to protect against the consequences of repeat exposure to the pathogen.
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Affiliation(s)
- Adam Hamdy
- Panres Pandemic Research, Newport TF10 8PG, UK
- Correspondence:
| | - Anthony Leonardi
- Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA;
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14
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Li Y, Xu M, Li Y, Zhang Z, Gu W, Halimu G, Li Y, Zhang H, Zhang C. Induction of CD4 + regulatory T cells by stimulation with Staphylococcal Enterotoxin C2 through different signaling pathways. Biomed Pharmacother 2021; 143:112204. [PMID: 34560552 DOI: 10.1016/j.biopha.2021.112204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 12/20/2022] Open
Abstract
As a member of superantigens, Staphylococcal Enterotoxin C2 (SEC2) can potently activate T cells expressing specific Vβ repertoires and has been applied in clinic for tumor immunotherapy in China for more than 20 years. However, excessive activation of T cells by over-stimulation with superantigen are always followed by eliciting regulatory T cells (Tregs) induction and functional immunosuppression, which brings uncertainties to SEC2 application in tumor immunotherapy. In this study, we found that SEC2 could induce CD4+CD25+Foxp3+ Tregs from the murine splenocytes in dose and time related manners. The induced Tregs with high expression of GITR and CTLA-4 and low expression of CD127 were TCR Vβ8.2-specific and have character of IL-10 production in a SEC2 dose-depended manner. Importantly, SEC2-induced CD4+ Tregs showed the potent capacity of suppressing proliferation of intact murine splenocytes response to SEC2. Furthermore, by using specific inhibitors or neutralizing antibody, we proved that the signaling pathways of TCR-NFAT/AP-1, IL-2-STAT5, and TGF-β-Smad3 play crucial roles in Tregs induction by SEC2. These findings will help us better understand the balance of immune stimulation and immunosuppression mediated by SEC2 and provide valuable guidance for SEC2 application in antitumor immunology.
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Affiliation(s)
- Yongqiang Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
| | - Mingkai Xu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; Key Laboratory of Superantigen Research, Shenyang Bureau of Science and Technology, Shenyang, China.
| | - Yansheng Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
| | - Zhichun Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
| | - Wu Gu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
| | - Gulinare Halimu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yuqi Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
| | - Huiwen Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; Key Laboratory of Superantigen Research, Shenyang Bureau of Science and Technology, Shenyang, China
| | - Chenggang Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; Key Laboratory of Superantigen Research, Shenyang Bureau of Science and Technology, Shenyang, China
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15
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Deacy AM, Gan SKE, Derrick JP. Superantigen Recognition and Interactions: Functions, Mechanisms and Applications. Front Immunol 2021; 12:731845. [PMID: 34616400 PMCID: PMC8488440 DOI: 10.3389/fimmu.2021.731845] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 08/30/2021] [Indexed: 12/27/2022] Open
Abstract
Superantigens are unconventional antigens which recognise immune receptors outside their usual recognition sites e.g. complementary determining regions (CDRs), to elicit a response within the target cell. T-cell superantigens crosslink T-cell receptors and MHC Class II molecules on antigen-presenting cells, leading to lymphocyte recruitment, induction of cytokine storms and T-cell anergy or apoptosis among many other effects. B-cell superantigens, on the other hand, bind immunoglobulins on B-cells, affecting opsonisation, IgG-mediated phagocytosis, and driving apoptosis. Here, through a review of the structural basis for recognition of immune receptors by superantigens, we show that their binding interfaces share specific physicochemical characteristics when compared with other protein-protein interaction complexes. Given that antibody-binding superantigens have been exploited extensively in industrial antibody purification, these observations could facilitate further protein engineering to optimize the use of superantigens in this and other areas of biotechnology.
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Affiliation(s)
- Anthony M. Deacy
- School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester, United Kingdom
| | - Samuel Ken-En Gan
- Antibody & Product Development Lab, Experimental Drug Development Centre – Bioinformatics Institute (EDDC-BII), Agency for Science Technology and Research (ASTAR), Singapore, Singapore
- James Cook University, Singapore, Singapore
| | - Jeremy P. Derrick
- School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester, United Kingdom
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16
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Czaja AJ. Incorporating mucosal-associated invariant T cells into the pathogenesis of chronic liver disease. World J Gastroenterol 2021; 27:3705-3733. [PMID: 34321839 PMCID: PMC8291028 DOI: 10.3748/wjg.v27.i25.3705] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 03/22/2021] [Accepted: 06/15/2021] [Indexed: 02/06/2023] Open
Abstract
Mucosal-associated invariant T (MAIT) cells have been described in liver and non-liver diseases, and they have been ascribed antimicrobial, immune regulatory, protective, and pathogenic roles. The goals of this review are to describe their biological properties, indicate their involvement in chronic liver disease, and encourage investigations that clarify their actions and therapeutic implications. English abstracts were identified in PubMed by multiple search terms, and bibliographies were developed. MAIT cells are activated by restricted non-peptides of limited diversity and by multiple inflammatory cytokines. Diverse pro-inflammatory, anti-inflammatory, and immune regulatory cytokines are released; infected cells are eliminated; and memory cells emerge. Circulating MAIT cells are hyper-activated, immune exhausted, dysfunctional, and depleted in chronic liver disease. This phenotype lacks disease-specificity, and it does not predict the biological effects. MAIT cells have presumed protective actions in chronic viral hepatitis, alcoholic hepatitis, non-alcoholic fatty liver disease, primary sclerosing cholangitis, and decompensated cirrhosis. They have pathogenic and pro-fibrotic actions in autoimmune hepatitis and mixed actions in primary biliary cholangitis. Local factors in the hepatic microenvironment (cytokines, bile acids, gut-derived bacterial antigens, and metabolic by-products) may modulate their response in individual diseases. Investigational manipulations of function are warranted to establish an association with disease severity and outcome. In conclusion, MAIT cells constitute a disease-nonspecific, immune response to chronic liver inflammation and infection. Their pathological role has been deduced from their deficiencies during active liver disease, and future investigations must clarify this role, link it to outcome, and explore therapeutic interventions.
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Affiliation(s)
- Albert J Czaja
- Department of Medicine, Mayo Clinic College of Medicine and Science, Rochester, MN 55905, United States
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17
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Moreews M, Le Gouge K, Khaldi-Plassart S, Pescarmona R, Mathieu AL, Malcus C, Djebali S, Bellomo A, Dauwalder O, Perret M, Villard M, Chopin E, Rouvet I, Vandenesh F, Dupieux C, Pouyau R, Teyssedre S, Guerder M, Louazon T, Moulin-Zinsch A, Duperril M, Patural H, Giovannini-Chami L, Portefaix A, Kassai B, Venet F, Monneret G, Lombard C, Flodrops H, De Guillebon JM, Bajolle F, Launay V, Bastard P, Zhang SY, Dubois V, Thaunat O, Richard JC, Mezidi M, Allatif O, Saker K, Dreux M, Abel L, Casanova JL, Marvel J, Trouillet-Assant S, Klatzmann D, Walzer T, Mariotti-Ferrandiz E, Javouhey E, Belot A. Polyclonal expansion of TCR Vbeta 21.3 + CD4 + and CD8 + T cells is a hallmark of Multisystem Inflammatory Syndrome in Children. Sci Immunol 2021; 6:eabh1516. [PMID: 34035116 PMCID: PMC8815705 DOI: 10.1126/sciimmunol.abh1516] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 05/18/2021] [Indexed: 12/11/2022]
Abstract
Multiple Inflammatory Syndrome in Children (MIS-C) is a delayed and severe complication of SARS-CoV-2 infection that strikes previously healthy children. As MIS-C combines clinical features of Kawasaki disease and Toxic Shock Syndrome (TSS), we aimed to compare the immunological profile of pediatric patients with these different conditions. We analyzed blood cytokine expression, and the T cell repertoire and phenotype in 36 MIS-C cases, which were compared to 16 KD, 58 TSS, and 42 COVID-19 cases. We observed an increase of serum inflammatory cytokines (IL-6, IL-10, IL-18, TNF-α, IFNγ, CD25s, MCP1, IL-1RA) in MIS-C, TSS and KD, contrasting with low expression of HLA-DR in monocytes. We detected a specific expansion of activated T cells expressing the Vβ21.3 T cell receptor β chain variable region in both CD4 and CD8 subsets in 75% of MIS-C patients and not in any patient with TSS, KD, or acute COVID-19; this correlated with the cytokine storm detected. The T cell repertoire returned to baseline within weeks after MIS-C resolution. Vβ21.3+ T cells from MIS-C patients expressed high levels of HLA-DR, CD38 and CX3CR1 but had weak responses to SARS-CoV-2 peptides in vitro. Consistently, the T cell expansion was not associated with specific classical HLA alleles. Thus, our data suggested that MIS-C is characterized by a polyclonal Vβ21.3 T cell expansion not directed against SARS-CoV-2 antigenic peptides, which is not seen in KD, TSS and acute COVID-19.
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Affiliation(s)
- Marion Moreews
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Kenz Le Gouge
- Sorbonne Université, UPMC Univ Paris 06, INSERM UMRS 959, Immunology Immunopathology-Immunotherapy (i3), Paris, France
| | - Samira Khaldi-Plassart
- (RAISE), France; Pediatric Nephrology, Rheumatology, Dermatology Unit, Hôpital Femme Mère Enfant, Hospices Civils de Lyon
- National Referee Centre for Rheumatic and AutoImmune and Systemic diseases in children
| | - Rémi Pescarmona
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- National Referee Centre for Rheumatic and AutoImmune and Systemic diseases in children
- Immunology Laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite
| | - Anne-Laure Mathieu
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France.
| | - Christophe Malcus
- Hospices Civils de Lyon, Edouard Herriot Hospital, Immunology Laboratory, 69437 Lyon, France
- EA 7426 "Pathophysiology of Injury-Induced Immunosuppression" (Université Claude Bernard Lyon 1 - Hospices Civils de Lyon - bioMérieux), Joint Research Unit HCL-bioMérieux, 69003, Lyon, France
| | - Sophia Djebali
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Alicia Bellomo
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Olivier Dauwalder
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, F-69004, Lyon, France
| | - Magali Perret
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Immunology Laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite
| | - Marine Villard
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Immunology Laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite
| | - Emilie Chopin
- Cellular Biotechnology Department and Biobank, Hospices Civils de Lyon, Lyon, France
| | - Isabelle Rouvet
- Cellular Biotechnology Department and Biobank, Hospices Civils de Lyon, Lyon, France
| | - Francois Vandenesh
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, F-69004, Lyon, France
| | - Céline Dupieux
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Centre National de Référence des Staphylocoques, Institut des Agents Infectieux, Hospices Civils de Lyon, F-69004, Lyon, France
| | - Robin Pouyau
- Réanimation Pédiatrique Hôpital Femme-Mère-Enfant Hospices Civils de Lyon, Bron, France
| | - Sonia Teyssedre
- Réanimation Pédiatrique Hôpital Femme-Mère-Enfant Hospices Civils de Lyon, Bron, France
| | - Margaux Guerder
- Réanimation Pédiatrique Hôpital Femme-Mère-Enfant Hospices Civils de Lyon, Bron, France
| | | | - Anne Moulin-Zinsch
- Unité medico-chirurgicale des cardiopathies congénitales, hôpital Louis-Pradel, hospices civils de Lyon, 69677 Bron, France
| | - Marie Duperril
- Pediatric intensive care unit - University hospital of Saint-Étienne, France
| | - Hugues Patural
- Pediatric intensive care unit - University hospital of Saint-Étienne, France
- U1059 INSERM - SAINBIOSE - DVH - Université de Saint-Étienne - 42055, France
| | - Lisa Giovannini-Chami
- Pediatric Pulmonology and Allergology Department, Hôpitaux pédiatriques de Nice CHU-Lenval, Nice, France
- Université Côte d'Azur, France
| | - Aurélie Portefaix
- Center of Clinical Investigation, Lyon University Hospital, Bron, France
| | - Behrouz Kassai
- Center of Clinical Investigation, Lyon University Hospital, Bron, France
| | - Fabienne Venet
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Hospices Civils de Lyon, Edouard Herriot Hospital, Immunology Laboratory, 69437 Lyon, France
| | - Guillaume Monneret
- Hospices Civils de Lyon, Edouard Herriot Hospital, Immunology Laboratory, 69437 Lyon, France
- EA 7426 "Pathophysiology of Injury-Induced Immunosuppression" (Université Claude Bernard Lyon 1 - Hospices Civils de Lyon - bioMérieux), Joint Research Unit HCL-bioMérieux, 69003, Lyon, France
| | - Christine Lombard
- Immunology Laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite
| | - Hugues Flodrops
- Service de Pédiatrie, Groupe Hospitalier Sud Réunion, CHU de La Réunion, Saint Pierre, La Réunion, France
| | - Jean-Marie De Guillebon
- Service de Néphrologie, Rhumatologie pédiatrique, Hôpitaux pédiatriques de Nice CHU-Lenval, Nice, France
| | - Fanny Bajolle
- Hôpital Necker Enfants Malades, Centre de référence M3C, AP-HP, Paris, France
| | - Valérie Launay
- Urgences pédiatriques, Hôpital femme Mère Enfant, Hospices Civils de Lyon, Bron, France
| | - Paul Bastard
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France
- University of Paris, Imagine Institute, Paris, France
| | - Shen-Ying Zhang
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Valérie Dubois
- EFS Auvergne Rhône Alpes, laboratoire Histocompatibilité, 111, rue Elisée-Reclus, 69150 Décines, France
| | - Olivier Thaunat
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- EFS Auvergne Rhône Alpes, laboratoire Histocompatibilité, 111, rue Elisée-Reclus, 69150 Décines, France
- Department of Transplantation, Nephrology and Clinical Immunology, Edouard Herriot University Hospital, Lyon, France
- Lyon-Est Medical Faculty, Claude Bernard University (Lyon 1), 8, avenue Rockfeller, 69373, Lyon, France
| | - Jean-Christophe Richard
- Médecine Intensive-Réanimation, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France
- Lyon University, France
| | - Mehdi Mezidi
- Médecine Intensive-Réanimation, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France
- Lyon University, France
| | - Omran Allatif
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Kahina Saker
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Laboratoire de Virologie, Institut des Agents Infectieux, Laboratoire associé au Centre National de Référence des virus des infections respiratoires, Hospices Civils de Lyon, Lyon, France
| | - Marlène Dreux
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Laurent Abel
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Jean-Laurent Casanova
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
- Howard Hughes Medical Institute, NY, USA
| | - Jacqueline Marvel
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Sophie Trouillet-Assant
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Laboratoire de Virologie, Institut des Agents Infectieux, Laboratoire associé au Centre National de Référence des virus des infections respiratoires, Hospices Civils de Lyon, Lyon, France
| | - David Klatzmann
- Sorbonne Université, UPMC Univ Paris 06, INSERM UMRS 959, Immunology Immunopathology-Immunotherapy (i3), Paris, France
- Assistance Publique - Hôpitaux de Paris, Hôpital Pitié-Salpêtrière, Biotherapy and Département Hospitalo-Universitaire Inflammation-Immunopathology-Biotherapy (i2B), Paris, France
| | - Thierry Walzer
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
| | - Encarnita Mariotti-Ferrandiz
- Sorbonne Université, UPMC Univ Paris 06, INSERM UMRS 959, Immunology Immunopathology-Immunotherapy (i3), Paris, France
- Assistance Publique - Hôpitaux de Paris, Hôpital Pitié-Salpêtrière, Biotherapy and Département Hospitalo-Universitaire Inflammation-Immunopathology-Biotherapy (i2B), Paris, France
| | - Etienne Javouhey
- EA 7426 "Pathophysiology of Injury-Induced Immunosuppression" (Université Claude Bernard Lyon 1 - Hospices Civils de Lyon - bioMérieux), Joint Research Unit HCL-bioMérieux, 69003, Lyon, France
- Réanimation Pédiatrique Hôpital Femme-Mère-Enfant Hospices Civils de Lyon, Bron, France
| | - Alexandre Belot
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard, Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France.
- Hospices Civils de Lyon, Edouard Herriot Hospital, Immunology Laboratory, 69437 Lyon, France
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18
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Hashemzadeh MS, Tapeh BE, Mirhosseini SA. The Role of Bacterial Superantigens in the Immune Response: From Biology to Cancer Treatment. CURRENT CANCER THERAPY REVIEWS 2021. [DOI: 10.2174/1573394716666200812150402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Aims:
Encouraging results have been indicated preclinically and in patients using the
bacterial superantigen. This review article intends to summarize the role of the superantigens that
have been recently used in the treatment of cancer. In addition, the vector systems, including lentiviral
vectors, adeno-associated vector systems and retroviral vectors that are increasingly being
used in basic and applied research, were discussed. Most importantly, the new CRISPR technique
has also been discussed in this literature review.
Discussion:
More successful therapies can be achieved by manipulating bacterial vector systems
through incorporating genes related to the superantigens and cytokines. The products of SAg and
cytokine genes contribute to the strong stimulation of the immune system against tumor cells. They
bind to MHC II molecules as well as the V beta regions of TCR and lead to the production of IL2
and other cytokines, the activation of antigen-presenting cells and T lymphocytes. Additionally, superantigens
can be used to eradicate tumor cells. Better results in cancer treatment can be achieved
by transferring superantigen genes and subsequent strong immune stimulation along with other cancer
immunotherapy agents.
Conclusion:
Superantigens induce the proliferation of T lymphocytes and antigen-presenting cells
by binding to MHCII molecules and V beta regions in T cell receptors. Therefore, the presentation
of tumor cell antigens is increased. Additionally, the production of important cytokines by T cells
and APCs contributes to the stimulation of immune response against tumor cells. The manipulation
of bacterial vector systems through incorporating genesrelated to SAgs and other immune response
factors is a good strategy for the immune system stimulating and eradicating tumor cells along with
other immunotherapy agents.
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Affiliation(s)
- Mohammad S. Hashemzadeh
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Behnam E.G. Tapeh
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Seyed A. Mirhosseini
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
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19
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Tajiri N, Kato T, Satoh M, Iizuka M, Taniguchi M, Kitaichi N, Iwabuchi K. The protective function of invariant natural killer T cells in the relapse of experimental autoimmune uveoretinitis. Exp Eye Res 2020; 203:108406. [PMID: 33347870 DOI: 10.1016/j.exer.2020.108406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/25/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022]
Abstract
Experimental autoimmune uveoretinitis (EAU) in mice provides a useful platform to study the pathogenesis and experimental therapeutics of human uveitis. One often used EAU model employs C57BL/6 (B6) mice sensitized with a peptide residue having 1 to 20 amino acids of human interphotoreceptor retinoid binding protein (hIRBP1-20). The model using the B6 background has permitted a liberal use of genetically engineered strains and has provided insights for understanding uveoretinitis. However, this is usually acute/monophasic and does not represent human uveoretinitis that is characterized as a chronic/recurrent disease. Several chronic/recurrent EAU models have been developed; of these, we employed administration of staphylococcal enterotoxin B (SEB) for relapse in the present study, and found that recurrence was induced at day 24 after primary immunization, which is thought to be the convalescent phase. We reported the activation of invariant natural killer T (iNKT)-cells upon primary immunization of the EAU model mice with the ligand RCAI-56, which was found to mitigate the disease in our previous study. Here, we first attempted to ameliorate EAU in the relapse model using a preventive regimen by activating iNKT cells at the same time relapse induction (day 24) or in a regimen after 3 days of relapse induction (day 27). The preventive as well as post-inductive regimens were successful in reducing histopathological scores by inhibiting the Ag-specific Th17-biased response. Collectively, activation of iNKT cells may be useful to mitigate the relapse response of EAU induced with SEB.
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Affiliation(s)
- Natsumi Tajiri
- Program in Cellular Immunology, Kitasato University Graduate School of Medical Sciences, Japan
| | - Taiki Kato
- Program in Cellular Immunology, Kitasato University Graduate School of Medical Sciences, Japan
| | - Masashi Satoh
- Program in Cellular Immunology, Kitasato University Graduate School of Medical Sciences, Japan; Department of Immunology, Kitasato University School of Medicine, Sagamihara, Japan.
| | - Misao Iizuka
- Department of Immunology, Kitasato University School of Medicine, Sagamihara, Japan
| | | | - Nobuyoshi Kitaichi
- Department of Ophthalmology, Health Sciences University of Hokkaido, Japan; Health Science University of Hokkaido Hospital, Sapporo, Japan
| | - Kazuya Iwabuchi
- Program in Cellular Immunology, Kitasato University Graduate School of Medical Sciences, Japan; Department of Immunology, Kitasato University School of Medicine, Sagamihara, Japan.
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20
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Forbes JD. Clinically Important Toxins in Bacterial Infection: Utility of Laboratory Detection. CLINICAL MICROBIOLOGY NEWSLETTER 2020; 42:163-170. [PMID: 33046946 PMCID: PMC7541054 DOI: 10.1016/j.clinmicnews.2020.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The elaboration of proteins that damage host cells is fundamental to the pathogenesis of many bacterial pathogens. The clinical significance of many bacterial toxins is well recognized, and routine detection is necessary to confirm definitive diagnosis for some types of infectious diseases. Determining the clinical significance of a toxin involves many factors, including the toxin's prevalence, virulence, and role in disease pathogenesis. While essential from a diagnostic perspective, toxin detection has the potential to be important for patient management decision making, as well as infection prevention and control measures. This review focuses on the history, epidemiology, pathogenesis, clinical presentation, and management of infections associated with well-defined, clinically important toxins (such as Shiga toxin-producing Escherichia coli), as well as those that are less well defined (such as Staphylococcus aureus' Panton-Valentine leukocidin) where detection may yield clinically important information.
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Affiliation(s)
- Jessica D Forbes
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
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21
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Shepherd FR, McLaren JE. T Cell Immunity to Bacterial Pathogens: Mechanisms of Immune Control and Bacterial Evasion. Int J Mol Sci 2020; 21:E6144. [PMID: 32858901 PMCID: PMC7504484 DOI: 10.3390/ijms21176144] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 02/06/2023] Open
Abstract
The human body frequently encounters harmful bacterial pathogens and employs immune defense mechanisms designed to counteract such pathogenic assault. In the adaptive immune system, major histocompatibility complex (MHC)-restricted αβ T cells, along with unconventional αβ or γδ T cells, respond to bacterial antigens to orchestrate persisting protective immune responses and generate immunological memory. Research in the past ten years accelerated our knowledge of how T cells recognize bacterial antigens and how many bacterial species have evolved mechanisms to evade host antimicrobial immune responses. Such escape mechanisms act to corrupt the crosstalk between innate and adaptive immunity, potentially tipping the balance of host immune responses toward pathological rather than protective. This review examines the latest developments in our knowledge of how T cell immunity responds to bacterial pathogens and evaluates some of the mechanisms that pathogenic bacteria use to evade such T cell immunosurveillance, to promote virulence and survival in the host.
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Affiliation(s)
| | - James E. McLaren
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, UK;
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22
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Shan H, Li X, Liu L, Song D, Wang Z. Recent advances in nanocomposite-based electrochemical aptasensors for the detection of toxins. J Mater Chem B 2020; 8:5808-5825. [PMID: 32538399 DOI: 10.1039/d0tb00705f] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Toxins are one of the major threatening factors to human and animal health, as well as economic growth. There is therefore an urgent demand from various communities to develop novel analytical methods for the sensitive detection of toxins in complex matrixes. Among the as-developed toxin detection strategies, nanocomposite-based aptamer sensors (termed as aptasensors) show tremendous potential for combating toxin pollution; in particular electrochemical (EC) aptasensors have received significant attention because of their unique advantages, including simplicity, rapidness, high sensitivity, low cost and suitability for field-testing. This paper reviewed the recently published approaches for the development of nanocomposite-/nanomaterial-based EC aptasensors for the detection of toxins with high assaying performance, and their potential applications in environmental monitoring, clinical diagnostics, and food safety control by summarizing the detection of different types of toxins, including fungal mycotoxins, algal toxins and bacterial enterotoxins. The effects of nanocomposite properties on the detection performance of EC aptasensors have been fully addressed for supplying readers with a comprehensive understanding of their improvement. The current technical challenges and future prospects of this subject have also been discussed.
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Affiliation(s)
- Hongyan Shan
- College of Chemistry, Jilin University, Changchun 130012, P. R. China
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23
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Meilleur CE, Memarnejadian A, Shivji AN, Benoit JM, Tuffs SW, Mele TS, Singh B, Dikeakos JD, Topham DJ, Mu HH, Bennink JR, McCormick JK, Haeryfar SMM. Discordant rearrangement of primary and anamnestic CD8+ T cell responses to influenza A viral epitopes upon exposure to bacterial superantigens: Implications for prophylactic vaccination, heterosubtypic immunity and superinfections. PLoS Pathog 2020; 16:e1008393. [PMID: 32433711 PMCID: PMC7239382 DOI: 10.1371/journal.ppat.1008393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 02/10/2020] [Indexed: 12/21/2022] Open
Abstract
Infection with (SAg)-producing bacteria may precede or follow infection with or vaccination against influenza A viruses (IAVs). However, how SAgs alter the breadth of IAV-specific CD8+ T cell (TCD8) responses is unknown. Moreover, whether recall responses mediating heterosubtypic immunity to IAVs are manipulated by SAgs remains unexplored. We employed wild-type (WT) and mutant bacterial SAgs, SAg-sufficient/deficient Staphylococcus aureus strains, and WT, mouse-adapted and reassortant IAV strains in multiple in vivo settings to address the above questions. Contrary to the popular view that SAgs delete or anergize T cells, systemic administration of staphylococcal enterotoxin B (SEB) or Mycoplasma arthritidis mitogen before intraperitoneal IAV immunization enlarged the clonal size of ‘select’ IAV-specific TCD8 and reshuffled the hierarchical pattern of primary TCD8 responses. This was mechanistically linked to the TCR Vβ makeup of the impacted clones rather than their immunodominance status. Importantly, SAg-expanded TCD8 retained their IFN-γ production and cognate cytolytic capacities. The enhancing effect of SEB on immunodominant TCD8 was also evident in primary responses to vaccination with heat-inactivated and live attenuated IAV strains administered intramuscularly and intranasally, respectively. Interestingly, in prime-boost immunization settings, the outcome of SEB administration depended strictly upon the time point at which this SAg was introduced. Accordingly, SEB injection before priming raised CD127highKLRG1low memory precursor frequencies and augmented the anamnestic responses of SEB-binding TCD8. By comparison, introducing SEB before boosting diminished recall responses to IAV-derived epitopes drastically and indiscriminately. This was accompanied by lower Ki67 and higher Fas, LAG-3 and PD-1 levels consistent with a pro-apoptotic and/or exhausted phenotype. Therefore, SAgs can have contrasting impacts on anti-IAV immunity depending on the naïve/memory status and the TCR composition of exposed TCD8. Finally, local administration of SEB or infection with SEB-producing S. aureus enhanced pulmonary TCD8 responses to IAV. Our findings have clear implications for superinfections and prophylactic vaccination. Exposure to bacterial superantigens (SAgs) is often a consequence of infection with common Gram-positive bacteria causing septic and toxic shock or food poisoning. How SAgs affect the magnitude, breadth and quality of infection/vaccine-elicited CD8+ T cell (TCD8) responses to respiratory viral pathogens, including influenza A viruses (IAVs), is far from clear. Also importantly, superinfections with IAVs and SAg-producing bacteria are serious clinical occurrences during seasonal and pandemic flu and require urgent attention. We demonstrate that two structurally distinct SAgs, including staphylococcal enterotoxin B (SEB), unexpectedly enhance primary TCD8 responses to ‘select’ IAV-derived epitopes depending on the TCR makeup of the responding clones. Intriguingly, the timing of exposure to SEB dictates the outcome of prime-boost immunization. Seeing a SAg before priming raises memory precursor frequencies and augments anamnestic TCD8 responses. Conversely, a SAg encounter before boosting renders TCD8 prone to death or exhaustion and impedes recall responses, thus likely compromising heterosubtypic immunity to IAVs. Finally, local exposure to SEB increases the pulmonary response of immunodominant IAV-specific TCD8. These findings shed new light on how bacterial infections and SAgs influence the effectiveness of anti-IAV TCD8 responses, and have, as such, wide-ranging implications for preventative vaccination and infection control.
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Affiliation(s)
- Courtney E. Meilleur
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Arash Memarnejadian
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Adil N. Shivji
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Jenna M. Benoit
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Stephen W. Tuffs
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Tina S. Mele
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
- Division of Critical Care Medicine, Department of Medicine, Western University, London, Ontario, Canada
| | - Bhagirath Singh
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
| | - Jimmy D. Dikeakos
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - David J. Topham
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Hong-Hua Mu
- Division of Rheumatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Jack R. Bennink
- Viral Immunology Section, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - John K. McCormick
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
| | - S. M. Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
- Division of Clinical Immunology & Allergy, Department of Medicine, Western University, London, Ontario, Canada
- * E-mail:
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24
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HIV gp120 Induces the Release of Proinflammatory, Angiogenic, and Lymphangiogenic Factors from Human Lung Mast Cells. Vaccines (Basel) 2020; 8:vaccines8020208. [PMID: 32375243 PMCID: PMC7349869 DOI: 10.3390/vaccines8020208] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/27/2020] [Accepted: 04/30/2020] [Indexed: 02/07/2023] Open
Abstract
Human lung mast cells (HLMCs) express the high-affinity receptor FcεRI for IgE and are involved in chronic pulmonary diseases occurring at high frequency among HIV-infected individuals. Immunoglobulin superantigens bind to the variable regions of either the heavy or light chain of immunoglobulins (Igs). Glycoprotein 120 (gp120) of HIV-1 is a typical immunoglobulin superantigen interacting with the heavy chain, variable 3 (VH3) region of human Igs. The present study investigated whether immunoglobulin superantigen gp120 caused the release of different classes of proinflammatory and immunoregulatory mediators from HLMCs. The results show that gp120 from different clades induced the rapid (30 min) release of preformed mediators (histamine and tryptase) from HLMCs. gp120 also caused the de novo synthesis of cysteinyl leukotriene C4 (LTC4) and prostaglandin D2 (PGD2) from HLMCs. Incubation (6 h) of HLMC with gp120 induced the release of angiogenic (VEGF-A) and lymphangiogenic (VEGF-C) factors from HLMCs. The activating property of gp120 was mediated through the interaction with IgE VH3+ bound to FcεRI. Our data indicate that HIV gp120 is a viral superantigen, which induces the release of different proinflammatory, angiogenic, and lymphangiogenic factors from HLMCs. These observations could contribute to understanding, at least in part, the pathophysiology of chronic pulmonary diseases in HIV-infected individuals.
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25
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Celie KB, Colen DL, Kovach SJ. Toxic Shock Syndrome after Surgery: Case Presentation and Systematic Review of the Literature. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2020; 8:e2499. [PMID: 33133879 PMCID: PMC7572075 DOI: 10.1097/gox.0000000000002499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/26/2019] [Indexed: 02/03/2023]
Abstract
Toxic shock syndrome (TSS) is an underrecognized but highly fatal cause of septic shock in postoperative patients. Although it may present with no overt source of infection, its course is devastating and rapidly progressive. Surgeon awareness is needed to recognize and treat this condition appropriately. In this paper, we aim to describe a case of postoperative TSS, present a systematic review of the literature, and provide an overview of the disease for the surgeon. METHODS A systematic review of the literature between 1978 and 2018 was performed according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines using the keywords "toxic shock syndrome" and "surgery." Variables of interest were collected in each report. RESULTS A total of 298 reports were screened, and 67 reports describing 96 individual patients met inclusion criteria. Six reports described a streptococcal cause, although the vast majority attributed TSS to Staphylococcus aureus (SA). The mortality in our review was 9.4%, although 24% of patients suffered some manner of permanent complication. TSS presented at a median of 4 days postoperatively, with most cases occurring within 10 days. CONCLUSIONS Surgeons must maintain a high index of suspicion for postoperative TSS. Our review demonstrates that TSS should not be excluded despite young patient age, patient health, or relative simplicity of a procedure. Symptoms such as fever, rash, pain out of proportion to examination, and diarrhea or emesis should raise concern for TSS and prompt exploration and cultures even of benign-appearing postoperative wounds.
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Affiliation(s)
- Karel-Bart Celie
- From the Division of Plastic and Reconstructive Surgery, Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, Calif
| | - David L. Colen
- Hospital of the University of Pennsylvania, Division of Plastic Surgery, Philadelphia, Pa
| | - Stephen J. Kovach
- Hospital of the University of Pennsylvania, Division of Plastic Surgery, Philadelphia, Pa
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26
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Meilleur CE, Wardell CM, Mele TS, Dikeakos JD, Bennink JR, Mu HH, McCormick JK, Haeryfar SMM. Bacterial Superantigens Expand and Activate, Rather than Delete or Incapacitate, Preexisting Antigen-Specific Memory CD8+ T Cells. J Infect Dis 2020; 219:1307-1317. [PMID: 30418594 DOI: 10.1093/infdis/jiy647] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/07/2018] [Indexed: 11/13/2022] Open
Abstract
Superantigens (SAgs) released by common Gram-positive bacterial pathogens have been reported to delete, anergize, or activate mouse T cells. However, little is known about their effects on preexisting memory CD8+ T cell (TCD8) pools. Furthermore, whether SAgs manipulate human memory TCD8 responses to cognate antigens is unknown. We used a human peripheral blood mononuclear cell culture system and a nontransgenic mouse model in which the impact of stimulation by two fundamentally distinct SAgs, staphylococcal enterotoxin B and Mycoplasma arthritidis mitogen, on influenza virus- and/or cytomegalovirus-specific memory TCD8 could be monitored. Bacterial SAgs surprisingly expanded antiviral memory TCD8 generated naturally through infection or artificially through vaccination. Mechanistically, this was a T cell-intrinsic and T cell receptor β-chain variable-dependent phenomenon. Importantly, SAg-expanded TCD8 displayed an effector memory phenotype and were capable of producing interferon-γ and destroying target cells ex vivo or in vivo. These findings have clear implications for antimicrobial defense and rational vaccine design.
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Affiliation(s)
- Courtney E Meilleur
- Department of Microbiology and Immunology, Western University, London, Canada
| | - Christine M Wardell
- Department of Microbiology and Immunology, Western University, London, Canada
| | - Tina S Mele
- Division of General Surgery, Department of Surgery, Western University, London, Canada.,Division of Critical Care Medicine, Western University, London, Canada
| | - Jimmy D Dikeakos
- Department of Microbiology and Immunology, Western University, London, Canada
| | - Jack R Bennink
- Viral Immunology Section, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Hong-Hua Mu
- Division of Rheumatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City
| | - John K McCormick
- Department of Microbiology and Immunology, Western University, London, Canada.,Centre for Human Immunology, Western University, London, Canada.,Lawson Health Research Institute, London, Canada
| | - S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Canada.,Division of General Surgery, Department of Surgery, Western University, London, Canada.,Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Canada.,Centre for Human Immunology, Western University, London, Canada.,Lawson Health Research Institute, London, Canada
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27
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Lefkovits I. A Few Key Historical Events in the Antibody Field: The Alacritous Antibody. Viral Immunol 2019; 33:253-265. [PMID: 31738667 DOI: 10.1089/vim.2019.0120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We have coined the term "alacrity" to describe the extraordinary diversity of B cell activation potentials, even among cells in a single B cell clone responding to a single antigen. The discovery of methodologies for B cell culture in limiting dilution allowed scientists to identify the source of cellular heterogeneity among cells of the immune system. Analyses of individual B cells set the stage for more detailed descriptions of the factors that diversify B cell functions, some of which will be expanded upon by partner articles in this B cell issue.
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Affiliation(s)
- Ivan Lefkovits
- Department of Biomedicine, University Hospital Basel, Basel, Switzerland
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28
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Hemmers S, Schizas M, Azizi E, Dikiy S, Zhong Y, Feng Y, Altan-Bonnet G, Rudensky AY. IL-2 production by self-reactive CD4 thymocytes scales regulatory T cell generation in the thymus. J Exp Med 2019; 216:2466-2478. [PMID: 31434685 PMCID: PMC6829602 DOI: 10.1084/jem.20190993] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/30/2019] [Accepted: 08/05/2019] [Indexed: 12/14/2022] Open
Abstract
Regulatory T (T reg) cells, a specialized subset of CD4+ T cells, are essential to prevent fatal autoimmunity. Expression of the T reg lineage-defining transcription factor Foxp3, and therefore their differentiation in the thymus, is dependent upon T cell receptor (TCR) and interleukin-2 (IL-2) signaling. Here, we report that the majority of IL-2-producing cells in the thymus are mature CD4 single-positive (CD4SP) thymocytes and that continuous IL-2 production sustained thymic T reg cell generation and control of systemic immune activation. Furthermore, single-cell RNA sequencing analysis of CD4 thymocyte subsets revealed that IL-2 was expressed in self-reactive CD4SP thymocytes, which also contain T reg precursor cells. Thus, our results suggest that the thymic T reg cell pool size is scaled by a key niche factor, IL-2, produced by self-reactive CD4SP thymocytes. This IL-2-dependent scaling of thymic T reg cell generation by overall self-reactivity of a mature post-selection thymic precursor pool may likely ensure adequate control of autoimmunity.
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Affiliation(s)
- Saskia Hemmers
- Howard Hughes Medical Institute and Immunology Program at Sloan Kettering Institute, and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Michail Schizas
- Howard Hughes Medical Institute and Immunology Program at Sloan Kettering Institute, and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Elham Azizi
- Program for Computational and Systems Biology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Stanislav Dikiy
- Howard Hughes Medical Institute and Immunology Program at Sloan Kettering Institute, and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY
- Immunology and Microbial Pathogenesis Program, Weill Cornell Graduate School of Medical Sciences, New York, NY
| | - Yi Zhong
- Howard Hughes Medical Institute and Immunology Program at Sloan Kettering Institute, and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Yongqiang Feng
- Howard Hughes Medical Institute and Immunology Program at Sloan Kettering Institute, and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Grégoire Altan-Bonnet
- Immunodynamics Group, Cancer and Inflammation Program, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Alexander Y Rudensky
- Howard Hughes Medical Institute and Immunology Program at Sloan Kettering Institute, and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY
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29
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T cell Receptor Vβ9 in Method for Rapidly Quantifying Active Staphylococcal Enterotoxin Type-A without Live Animals. Toxins (Basel) 2019; 11:toxins11070399. [PMID: 31295829 PMCID: PMC6669470 DOI: 10.3390/toxins11070399] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 07/05/2019] [Accepted: 07/07/2019] [Indexed: 01/24/2023] Open
Abstract
Staphylococcal food poisoning is a result of ingestion of Staphylococcal enterotoxins (SEs) produced by Staphylococcus aureus. Staphylococcal enterotoxin type A (SEA) is the predominant toxin produced by S. aureus strains isolated from food-poisoning outbreak cases. For public safety, assays to detect and quantify SEA ideally respond only to the active form of the toxin and this usually means employing disfavored live animal testing which suffers also from poor reproducibility and sensitivity. We developed a cell-based assay for SEA quantification in which biologically-active SEA is presented by Raji B-cells to CCRF-CEM T-cells resulting in internalization of Vβ9 within 2 hours with dose dependency over a 6-log range of SEA concentrations. This bioassay can discern biologically active SEA from heat-inactivated SEA and is specific to SEA with no cross reactivity to the homologically-similar SED or SEE. In this study, we terminated any ongoing biochemical reactions in accessory cells while retaining the morphology of the antigenic sites by using paraformaldehyde fixation and challenged the current model for mechanism of action of the SEA superantigen. We demonstrated for the first time that although fixed, dead accessory cells, having no metabolic functions to process the SEA superantigen into short peptide fragments for display on their cell surface, can instead present intact SEA to induce T-cell activation which leads to cytokine production. However, the level of cytokine secretion induced by intact SEA was statistically significantly lower than with viable accessory cells, which have the ability to internalize and process the SEA superantigen.
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30
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Proctor RA. Immunity to Staphylococcus aureus: Implications for Vaccine Development. Microbiol Spectr 2019; 7:10.1128/microbiolspec.gpp3-0037-2018. [PMID: 31298209 PMCID: PMC10957185 DOI: 10.1128/microbiolspec.gpp3-0037-2018] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 12/19/2022] Open
Abstract
Cell-mediated immunity seems to be critical for prevention and resolution of invasive S. aureus infections, but an imbalance in this immunity may also produce SIRS and death or an inadequate protective response with prolonged bacteremia and death. This dysregulation is likely at the heart of mortality and severe disease in humans. Anti-toxin antibodies may also come into play in reducing the severity of S. aureus infections, but these antibodies might also address superantigen-induced immune dysregulation. Thus, while changing intrinsic T cell responses may be therapeutically difficult, monoclonal antibodies against superantigens may have utility in addressing dysfunctional immune responses to S. aureus. The models above are hypotheses for examining, and potentially dramatically improving immune response to and safety of S. aureus vaccines.
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Affiliation(s)
- Richard A Proctor
- University of Wisconsin, Medical Microbiology/Immunology, Madison, WI 53705
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31
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Varricchi G, Loffredo S, Borriello F, Pecoraro A, Rivellese F, Genovese A, Spadaro G, Marone G. Superantigenic Activation of Human Cardiac Mast Cells. Int J Mol Sci 2019; 20:ijms20081828. [PMID: 31013832 PMCID: PMC6514993 DOI: 10.3390/ijms20081828] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 02/06/2023] Open
Abstract
B cell superantigens, also called immunoglobulin superantigens, bind to the variable regions of either the heavy or light chain of immunoglobulins mirroring the lymphocyte-activating properties of classical T cell superantigens. Protein A of Staphylococcus aureus, protein L of Peptostreptococcus magnus, and gp120 of HIV are typical immunoglobulin superantigens. Mast cells are immune cells expressing the high-affinity receptor for IgE (FcεRI) and are strategically located in the human heart, where they play a role in several cardiometabolic diseases. Here, we investigated whether immunoglobulin superantigens induced the activation of human heart mast cells (HHMCs). Protein A induced the de novo synthesis of cysteinyl leukotriene C4 (LTC4) from HHMCs through the interaction with IgE VH3+ bound to FcεRI. Protein L stimulated the production of prostaglandin D2 (PGD2) from HHMCs through the interaction with κ light chains of IgE. HIV glycoprotein gp120 induced the release of preformed (histamine) and de novo synthesized mediators, such as cysteinyl leukotriene C4 (LTC4), angiogenic (VEGF-A), and lymphangiogenic (VEGF-C) factors by interacting with the VH3 region of IgE. Collectively, our data indicate that bacterial and viral immunoglobulin superantigens can interact with different regions of IgE bound to FcεRI to induce the release of proinflammatory, angiogenic, and lymphangiogenic factors from human cardiac mast cells.
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Affiliation(s)
- Gilda Varricchi
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
- Center for Basic and Clinical Immunology Research (CISI), 80100 Naples, Italy.
- World Allergy Organization (WAO) Center of Excellence, 80100 Naples, Italy.
| | - Stefania Loffredo
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
- Center for Basic and Clinical Immunology Research (CISI), 80100 Naples, Italy.
- World Allergy Organization (WAO) Center of Excellence, 80100 Naples, Italy.
| | - Francesco Borriello
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
- Center for Basic and Clinical Immunology Research (CISI), 80100 Naples, Italy.
- World Allergy Organization (WAO) Center of Excellence, 80100 Naples, Italy.
- Division of Gastroenterology, Boston Children's Hospital and Harvard Medical School, Boston, 02115 MA, USA.
| | - Antonio Pecoraro
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
| | - Felice Rivellese
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, E1 4NS London, UK.
| | - Arturo Genovese
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
- Center for Basic and Clinical Immunology Research (CISI), 80100 Naples, Italy.
- World Allergy Organization (WAO) Center of Excellence, 80100 Naples, Italy.
| | - Giuseppe Spadaro
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
- Center for Basic and Clinical Immunology Research (CISI), 80100 Naples, Italy.
- World Allergy Organization (WAO) Center of Excellence, 80100 Naples, Italy.
| | - Gianni Marone
- Department of Translational Medical Sciences, University of Naples Federico II, 80100 Naples, Italy.
- Center for Basic and Clinical Immunology Research (CISI), 80100 Naples, Italy.
- World Allergy Organization (WAO) Center of Excellence, 80100 Naples, Italy.
- Institute of Experimental Endocrinology and Oncology "Gaetano Salvatore", National Research Council (CNR), 80100 Naples, Italy.
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32
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Abstract
ABSTRACT
Streptococcus pyogenes
(i.e., the group A
Streptococcus
) is a human-restricted and versatile bacterial pathogen that produces an impressive arsenal of both surface-expressed and secreted virulence factors. Although surface-expressed virulence factors are clearly vital for colonization, establishing infection, and the development of disease, the secreted virulence factors are likely the major mediators of tissue damage and toxicity seen during active infection. The collective exotoxin arsenal of
S. pyogenes
is rivaled by few bacterial pathogens and includes extracellular enzymes, membrane active proteins, and a variety of toxins that specifically target both the innate and adaptive arms of the immune system, including the superantigens; however, despite their role in
S. pyogenes
disease, each of these virulence factors has likely evolved with humans in the context of asymptomatic colonization and transmission. In this article, we focus on the biology of the true secreted exotoxins of the group A
Streptococcus
, as well as their roles in the pathogenesis of human disease.
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33
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Muluk NB, Altın F, Cingi C. Role of Superantigens in Allergic Inflammation: Their Relationship to Allergic Rhinitis, Chronic Rhinosinusitis, Asthma, and Atopic Dermatitis. Am J Rhinol Allergy 2018; 32:502-517. [PMID: 30253652 DOI: 10.1177/1945892418801083] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Our intention was to review all material published to date regarding superantigens (SAgs) and allergy from an otorhinolaryngological viewpoint to understand this association more clearly. METHODS We identified all materials published mentioning both SAg and allergic rhinitis (AR), chronic sinusitis, asthma, and atopic dermatitis (AD) that are indexed on PubMed, Google, or the ProQuest Central databases. RESULTS Staphylococcus aureus is a significant bacterial pathogen in humans and has the ability to produce enterotoxins with superantigenic features. The inflammatory response in allergy seen in both B cell and T cell may be attributed to SAgs. Sufferers of both allergic asthma with rhinitis and AR alone produce serological evidence of immunoglobulin E formation to SAgs produced by S. aureus. Perennial AR sufferers carry S. aureus more frequently and the presence of the organism within the nasal cavity may exacerbate perennial AR. SAg produced by S. aureus potentially worsens the asthmatic inflammatory response within the airway and may lead to the airways becoming hyperresponsive, as well as possibly activating T cells if asthmatic control is poor. Staphylococcal SAgs potentially increase the risk of developing chronic rhinosinusitis with nasal polyposis, additionally being a marker for more severe disease. If SAgs bring about chronic inflammatory responses in the nose and sinuses, then T cells excreting interferon-gamma may be a crucial mediator. In allergic dermatitis, S. aureus could be a key player in exacerbation of the condition. Even in younger pediatric patients with allergic dermatitis, allergic hypersensitivity to SAgs is frequent and may be a factor explaining how severe the condition becomes. CONCLUSION Just as SAgs are known to feature in many allergic conditions, they play their part in AR, chronic rhinosinusitis, asthma, and AD. Further research is required before the relationship between SAgs and allergy can be adequately explained.
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Affiliation(s)
- Nuray Bayar Muluk
- 1 Department of Otorhinolaryngology, Medical Faculty, Kirikkale University, Kirikkale, Turkey
| | - Fazilet Altın
- 2 ENT Clinics, Haseki Training and Research Hospital, Istanbul, Turkey
| | - Cemal Cingi
- 3 Department of Otorhinolaryngology, Medical Faculty, Eskisehir Osmangazi University, Eskisehir, Turkey
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34
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Kuschnaroff L, De Belder K, Vandeputte M, Waer M. Factors involved in peripheral T cell tolerance: the extent of clonal deletion or clonal anergy depends on the age of the tolerized lymphocytes. Transpl Int 2018. [DOI: 10.1111/tri.1992.5.s1.589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Calvo V, Izquierdo M. Imaging Polarized Secretory Traffic at the Immune Synapse in Living T Lymphocytes. Front Immunol 2018; 9:684. [PMID: 29681902 PMCID: PMC5897431 DOI: 10.3389/fimmu.2018.00684] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/20/2018] [Indexed: 12/20/2022] Open
Abstract
Immune synapse (IS) formation by T lymphocytes constitutes a crucial event involved in antigen-specific, cellular and humoral immune responses. After IS formation by T lymphocytes and antigen-presenting cells, the convergence of secretory vesicles toward the microtubule-organizing center (MTOC) and MTOC polarization to the IS are involved in polarized secretion at the synaptic cleft. This specialized mechanism appears to specifically provide the immune system with a fine strategy to increase the efficiency of crucial secretory effector functions of T lymphocytes, while minimizing non-specific, cytokine-mediated stimulation of bystander cells, target cell killing and activation-induced cell death. The molecular bases involved in the polarized secretory traffic toward the IS in T lymphocytes have been the focus of interest, thus different models and several imaging strategies have been developed to gain insights into the mechanisms governing directional secretory traffic. In this review, we deal with the most widely used, state-of-the-art approaches to address the molecular mechanisms underlying this crucial, immune secretory response.
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Affiliation(s)
- Víctor Calvo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Madrid, Spain
| | - Manuel Izquierdo
- Departamento de Bioquímica, Instituto de Investigaciones Biomédicas Alberto Sols CSIC-UAM, Madrid, Spain
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36
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Okamoto S, Nagase S. Pathogenic mechanisms of invasive group AStreptococcusinfections by influenza virus-group AStreptococcussuperinfection. Microbiol Immunol 2018; 62:141-149. [DOI: 10.1111/1348-0421.12577] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/19/2018] [Accepted: 01/24/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Shigefumi Okamoto
- Department of Laboratory Sciences; Faculty of Health Sciences, Kanazawa University; 5-11-80 Kodatsuno Kanazawa Ishikawa 920-0942 Japan
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences; Kanazawa University; 5-11-80 Kodatsuno Kanazawa Ishikawa 920-0942 Japan
| | - Satoshi Nagase
- Department of Laboratory Sciences; Faculty of Health Sciences, Kanazawa University; 5-11-80 Kodatsuno Kanazawa Ishikawa 920-0942 Japan
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37
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Fisher EL, Otto M, Cheung GYC. Basis of Virulence in Enterotoxin-Mediated Staphylococcal Food Poisoning. Front Microbiol 2018; 9:436. [PMID: 29662470 PMCID: PMC5890119 DOI: 10.3389/fmicb.2018.00436] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 02/26/2018] [Indexed: 12/17/2022] Open
Abstract
The Staphylococcus aureus enterotoxins are a superfamily of secreted virulence factors that share structural and functional similarities and possess potent superantigenic activity causing disruptions in adaptive immunity. The enterotoxins can be separated into two groups; the classical (SEA-SEE) and the newer (SEG-SElY and counting) enterotoxin groups. Many members from both these groups contribute to the pathogenesis of several serious human diseases, including toxic shock syndrome, pneumonia, and sepsis-related infections. Additionally, many members demonstrate emetic activity and are frequently responsible for food poisoning outbreaks. Due to their robust tolerance to denaturing, the enterotoxins retain activity in food contaminated previously with S. aureus. The genes encoding the enterotoxins are found mostly on a variety of different mobile genetic elements. Therefore, the presence of enterotoxins can vary widely among different S. aureus isolates. Additionally, the enterotoxins are regulated by multiple, and often overlapping, regulatory pathways, which are influenced by environmental factors. In this review, we also will focus on the newer enterotoxins (SEG-SElY), which matter for the role of S. aureus as an enteropathogen, and summarize our current knowledge on their prevalence in recent food poisoning outbreaks. Finally, we will review the current literature regarding the key elements that govern the complex regulation of enterotoxins, the molecular mechanisms underlying their enterotoxigenic, superantigenic, and immunomodulatory functions, and discuss how these activities may collectively contribute to the overall manifestation of staphylococcal food poisoning.
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Affiliation(s)
- Emilie L Fisher
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Michael Otto
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Gordon Y C Cheung
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
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38
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Streptococcal pharyngitis and rheumatic heart disease: the superantigen hypothesis revisited. INFECTION GENETICS AND EVOLUTION 2018. [PMID: 29530660 DOI: 10.1016/j.meegid.2018.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Streptococcus pyogenes is a human-specific and globally prominent bacterial pathogen that despite causing numerous human infections, this bacterium is normally found in an asymptomatic carrier state. This review provides an overview of both bacterial and human factors that likely play an important role in nasopharyngeal colonization and pharyngitis, as well as the development of acute rheumatic fever and rheumatic heart disease. Here we highlight a recently described role for bacterial superantigens in promoting acute nasopharyngeal infection, and discuss how these immune system activating toxins could be crucial to initiate the autoimmune process in rheumatic heart disease.
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39
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Lee J, Park N, Park JY, Kaplan BLF, Pruett SB, Park JW, Park YH, Seo KS. Induction of Immunosuppressive CD8 +CD25 +FOXP3 + Regulatory T Cells by Suboptimal Stimulation with Staphylococcal Enterotoxin C1. THE JOURNAL OF IMMUNOLOGY 2017; 200:669-680. [PMID: 29237775 DOI: 10.4049/jimmunol.1602109] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 11/13/2017] [Indexed: 12/17/2022]
Abstract
Superantigens (SAgs) produced by Staphylococcus aureus at high concentrations induce proliferation of T cells bearing specific TCR Vβ sequences and massive cytokinemia that cause toxic shock syndrome. However, the biological relevance of SAgs produced at very low concentrations during asymptomatic colonization or chronic infections is not understood. In this study, we demonstrate that suboptimal stimulation of human PBMCs with a low concentration (1 ng/ml) of staphylococcal enterotoxin C1, at which half-maximal T cell proliferation was observed, induced CD8+CD25+ T cells expressing markers related to regulatory T cells (Tregs), such as IFN-γ, IL-10, TGF-β, FOXP3, CD28, CTLA4, TNFR2, CD45RO, and HLA-DR. Importantly, these CD8+CD25+ T cells suppressed responder cell proliferation mediated in contact-dependent and soluble factor-dependent manners, involving galectin-1 and granzymes, respectively. In contrast, optimal stimulation of human PBMCs with a high concentration (1 μg/ml) of staphylococcal enterotoxin C1, at which maximal T cell proliferation was observed, also induced similar expression of markers related to Tregs, including FOXP3 in CD8+CD25+ cells, but these T cells were not functionally immunosuppressive. We further demonstrated that SAg-induced TCR Vβ-restricted and MHC class II-restricted expansion of immunosuppressive CD8+CD25+ T cells is independent of CD4+ T cells. Our results suggest that the concentration of SAg strongly affects the functional characteristics of activated T cells, and low concentrations of SAg produced during asymptomatic colonization or chronic S. aureus infection induce immunosuppressive CD8+ Tregs, potentially promoting colonization, propagation, and invasion of S. aureus in the host.
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Affiliation(s)
- Juyeun Lee
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762
| | - Nogi Park
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762
| | - Joo Youn Park
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762
| | - Barbara L F Kaplan
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762
| | - Stephen B Pruett
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762
| | - Juw Won Park
- Kentucky Biomedical Research Infrastructure Network Bioinformatics Core, Department of Computer Engineering and Computer Science, University of Louisville, Louisville, KY 40292; and
| | - Yong Ho Park
- Department of Microbiology, BK21 Program for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 151-742, South Korea
| | - Keun Seok Seo
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762;
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40
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Müller L, Hainberger D, Stolz V, Hamminger P, Hassan H, Preglej T, Boucheron N, Sakaguchi S, Wiegers GJ, Villunger A, Auwerx J, Ellmeier W. The corepressor NCOR1 regulates the survival of single-positive thymocytes. Sci Rep 2017; 7:15928. [PMID: 29162920 PMCID: PMC5698297 DOI: 10.1038/s41598-017-15918-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 11/03/2017] [Indexed: 01/09/2023] Open
Abstract
Nuclear receptor corepressor 1 (NCOR1) is a transcriptional regulator bridging repressive chromatin modifying enzymes with transcription factors. NCOR1 regulates many biological processes, however its role in T cells is not known. Here we show that Cd4-Cre-mediated deletion of NCOR1 (NCOR1 cKOCd4) resulted in a reduction of peripheral T cell numbers due to a decrease in single-positive (SP) thymocytes. In contrast, double-positive (DP) thymocyte numbers were not affected in the absence of NCOR1. The reduction in SP cells was due to diminished survival of NCOR1-null postselection TCRβhiCD69+ and mature TCRβhiCD69- thymocytes. NCOR1-null thymocytes expressed elevated levels of the pro-apoptotic factor BIM and showed a higher fraction of cleaved caspase 3-positive cells upon TCR stimulation ex vivo. However, staphylococcal enterotoxin B (SEB)-mediated deletion of Vβ8+ CD4SP thymocytes was normal, suggesting that negative selection is not altered in the absence of NCOR1. Finally, transgenic expression of the pro-survival protein BCL2 restored the population of CD69+ thymocytes in NCOR1 cKOCd4 mice to a similar percentage as observed in WT mice. Together, these data identify NCOR1 as a crucial regulator of the survival of SP thymocytes and revealed that NCOR1 is essential for the proper generation of the peripheral T cell pool.
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Affiliation(s)
- Lena Müller
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - Daniela Hainberger
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - Valentina Stolz
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - Patricia Hamminger
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - Hammad Hassan
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria.,Department of Biochemistry (Shankar Campus), Abdul Wali Khan University (AWKUM) Mardan, KPK, Pakistan
| | - Teresa Preglej
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - Nicole Boucheron
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - Shinya Sakaguchi
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria
| | - G Jan Wiegers
- Innsbruck Medical University, Biocenter, Division of Developmental Immunology, Innsbruck, Austria
| | - Andreas Villunger
- Innsbruck Medical University, Biocenter, Division of Developmental Immunology, Innsbruck, Austria
| | - Johan Auwerx
- Ecole Polytechnique Fédérale de Lausanne, Laboratory of Integrative and Systems Physiology, Lausanne, Switzerland
| | - Wilfried Ellmeier
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, 1090, Vienna, Austria.
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41
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Xiao X, Cai J. Mucosal-Associated Invariant T Cells: New Insights into Antigen Recognition and Activation. Front Immunol 2017; 8:1540. [PMID: 29176983 PMCID: PMC5686390 DOI: 10.3389/fimmu.2017.01540] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 10/30/2017] [Indexed: 12/20/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells, a novel subpopulation of innate-like T cells that express an invariant T cell receptor (TCR)α chain and a diverse TCRβ chain, can recognize a distinct set of small molecules, vitamin B metabolites, derived from some bacteria, fungi but not viruses, in the context of an evolutionarily conserved major histocompatibility complex-related molecule 1 (MR1). This implies that MAIT cells may play unique and important roles in host immunity. Although viral antigens are not recognized by this limited TCR repertoire, MAIT cells are known to be activated in a TCR-independent mechanism during some viral infections, such as hepatitis C virus and influenza virus. In this article, we will review recent works in MAIT cell antigen recognition, activation and the role MAIT cells may play in the process of bacterial and viral infections and pathogenesis of non-infectious diseases.
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Affiliation(s)
- Xingxing Xiao
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Jianping Cai
- State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Animal Infectious Diseases and Zoonoses, Yangzhou, China
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42
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Electrochemical aptasensors for contaminants detection in food and environment: Recent advances. Bioelectrochemistry 2017; 118:47-61. [PMID: 28715665 DOI: 10.1016/j.bioelechem.2017.07.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 07/10/2017] [Accepted: 07/11/2017] [Indexed: 12/26/2022]
Abstract
The growing number of contaminants requires the development of new analytical tools to meet the increasing demand for legislative actions on food safety and environmental pollution control. In this context, electrochemical aptamer-based sensors appear promising among all biosensors because they permit multiplexed analysis and provide fast response, sensitivity, specificity and low cost. The aim of this review is to give the readers an overview of recent important achievements in the development of electrochemical aptamer-based biosensors for contaminant detection over the last two years. Special emphasis is placed on aptasensors based on screen-printed electrodes which show a substantial improvement of analytical performances.
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43
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Shaler CR, Choi J, Rudak PT, Memarnejadian A, Szabo PA, Tun-Abraham ME, Rossjohn J, Corbett AJ, McCluskey J, McCormick JK, Lantz O, Hernandez-Alejandro R, Haeryfar SM. MAIT cells launch a rapid, robust and distinct hyperinflammatory response to bacterial superantigens and quickly acquire an anergic phenotype that impedes their cognate antimicrobial function: Defining a novel mechanism of superantigen-induced immunopathology and immunosuppression. PLoS Biol 2017. [PMID: 28632753 PMCID: PMC5478099 DOI: 10.1371/journal.pbio.2001930] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Superantigens (SAgs) are potent exotoxins secreted by Staphylococcus aureus and Streptococcus pyogenes. They target a large fraction of T cell pools to set in motion a "cytokine storm" with severe and sometimes life-threatening consequences typically encountered in toxic shock syndrome (TSS). Given the rapidity with which TSS develops, designing timely and truly targeted therapies for this syndrome requires identification of key mediators of the cytokine storm's initial wave. Equally important, early host responses to SAgs can be accompanied or followed by a state of immunosuppression, which in turn jeopardizes the host's ability to combat and clear infections. Unlike in mouse models, the mechanisms underlying SAg-associated immunosuppression in humans are ill-defined. In this work, we have identified a population of innate-like T cells, called mucosa-associated invariant T (MAIT) cells, as the most powerful source of pro-inflammatory cytokines after exposure to SAgs. We have utilized primary human peripheral blood and hepatic mononuclear cells, mouse MAIT hybridoma lines, HLA-DR4-transgenic mice, MAIThighHLA-DR4+ bone marrow chimeras, and humanized NOD-scid IL-2Rγnull mice to demonstrate for the first time that: i) mouse and human MAIT cells are hyperresponsive to SAgs, typified by staphylococcal enterotoxin B (SEB); ii) the human MAIT cell response to SEB is rapid and far greater in magnitude than that launched by unfractionated conventional T, invariant natural killer T (iNKT) or γδ T cells, and is characterized by production of interferon (IFN)-γ, tumor necrosis factor (TNF)-α and interleukin (IL)-2, but not IL-17A; iii) high-affinity MHC class II interaction with SAgs, but not MHC-related protein 1 (MR1) participation, is required for MAIT cell activation; iv) MAIT cell responses to SEB can occur in a T cell receptor (TCR) Vβ-specific manner but are largely contributed by IL-12 and IL-18; v) as MAIT cells are primed by SAgs, they also begin to develop a molecular signature consistent with exhaustion and failure to participate in antimicrobial defense. Accordingly, they upregulate lymphocyte-activation gene 3 (LAG-3), T cell immunoglobulin and mucin-3 (TIM-3), and/or programmed cell death-1 (PD-1), and acquire an anergic phenotype that interferes with their cognate function against Klebsiella pneumoniae and Escherichia coli; vi) MAIT cell hyperactivation and anergy co-utilize a signaling pathway that is governed by p38 and MEK1/2. Collectively, our findings demonstrate a pathogenic, rather than protective, role for MAIT cells during infection. Furthermore, we propose a novel mechanism of SAg-associated immunosuppression in humans. MAIT cells may therefore provide an attractive therapeutic target for the management of both early and late phases of severe SAg-mediated illnesses.
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MESH Headings
- Animals
- Antigens, Bacterial/metabolism
- Antigens, Bacterial/toxicity
- Bone Marrow Cells/cytology
- Bone Marrow Cells/drug effects
- Bone Marrow Cells/immunology
- Bone Marrow Cells/metabolism
- Cell Line
- Cells, Cultured
- Clonal Anergy/drug effects
- Crosses, Genetic
- Enterotoxins/metabolism
- Enterotoxins/toxicity
- Female
- Humans
- Hybridomas
- Immunity, Innate
- Leukocytes, Mononuclear/cytology
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Lymphocyte Activation/drug effects
- Mice
- Mice, Inbred NOD
- Mice, Knockout
- Mice, SCID
- Mice, Transgenic
- Models, Immunological
- Mucosal-Associated Invariant T Cells/cytology
- Mucosal-Associated Invariant T Cells/drug effects
- Mucosal-Associated Invariant T Cells/immunology
- Mucosal-Associated Invariant T Cells/metabolism
- Specific Pathogen-Free Organisms
- Staphylococcus aureus/immunology
- Staphylococcus aureus/metabolism
- Streptococcus pyogenes/immunology
- Streptococcus pyogenes/metabolism
- Superantigens/metabolism
- Superantigens/toxicity
- Transplantation Chimera/blood
- Transplantation Chimera/immunology
- Transplantation Chimera/metabolism
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Affiliation(s)
- Christopher R. Shaler
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Joshua Choi
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Patrick T. Rudak
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Arash Memarnejadian
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Peter A. Szabo
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Mauro E. Tun-Abraham
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
| | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
- Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Alexandra J. Corbett
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, Australia
| | - John K. McCormick
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
| | - Olivier Lantz
- Laboratoire d'Immunologie and INSERM U932, Institut Curie, Paris, France
| | - Roberto Hernandez-Alejandro
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
- Division of Transplantation, Department of Surgery, University of Rochester Medical Center, Rochester, New York, United States of America
| | - S.M. Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Ontario, Canada
- * E-mail:
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Aslam B, Khurshid M, Nisar MA, Muzammil S, Hayat S. Superantigens: procession of frets. Braz J Infect Dis 2017; 21:357-358. [PMID: 28137594 PMCID: PMC9427658 DOI: 10.1016/j.bjid.2016.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 12/05/2016] [Indexed: 12/01/2022] Open
Affiliation(s)
- Bilal Aslam
- Government College University, Department of Microbiology, Faisalabad, Pakistan.
| | - Mohsin Khurshid
- Government College University, Directorate of Medical Sciences, College of Allied Health Professionals, Faisalabad, Pakistan
| | - Muhammad Atif Nisar
- Government College University, Department of Microbiology, Faisalabad, Pakistan
| | - Saima Muzammil
- Government College University, Department of Microbiology, Faisalabad, Pakistan
| | - Sumreen Hayat
- Government College University, Department of Microbiology, Faisalabad, Pakistan
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Szabo PA, Goswami A, Mazzuca DM, Kim K, O'Gorman DB, Hess DA, Welch ID, Young HA, Singh B, McCormick JK, Haeryfar SMM. Rapid and Rigorous IL-17A Production by a Distinct Subpopulation of Effector Memory T Lymphocytes Constitutes a Novel Mechanism of Toxic Shock Syndrome Immunopathology. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2017; 198:2805-2818. [PMID: 28219889 PMCID: PMC6635948 DOI: 10.4049/jimmunol.1601366] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 01/25/2017] [Indexed: 01/13/2023]
Abstract
Toxic shock syndrome (TSS) is caused by staphylococcal and streptococcal superantigens (SAgs) that provoke a swift hyperinflammatory response typified by a cytokine storm. The precipitous decline in the host's clinical status and the lack of targeted therapies for TSS emphasize the need to identify key players of the storm's initial wave. Using a humanized mouse model of TSS and human cells, we herein demonstrate that SAgs elicit in vitro and in vivo IL-17A responses within hours. SAg-triggered human IL-17A production was characterized by remarkably high mRNA stability for this cytokine. A distinct subpopulation of CD4+ effector memory T (TEM) cells that secrete IL-17A, but not IFN-γ, was responsible for early IL-17A production. We found mouse "TEM-17" cells to be enriched within the intestinal epithelium and among lamina propria lymphocytes. Furthermore, interfering with IL-17A receptor signaling in human PBMCs attenuated the expression of numerous inflammatory mediators implicated in the TSS-associated cytokine storm. IL-17A receptor blockade also abrogated the secondary effect of SAg-stimulated PBMCs on human dermal fibroblasts as judged by C/EBP δ expression. Finally, the early IL-17A response to SAgs was pathogenic because in vivo neutralization of IL-17A in humanized mice ameliorated hepatic and intestinal damage and reduced mortality. Together, our findings identify CD4+ TEM cells as a key effector of TSS and reveal a novel role for IL-17A in TSS immunopathogenesis. Our work thus elucidates a pathogenic, as opposed to protective, role for IL-17A during Gram-positive bacterial infections. Accordingly, the IL-17-IL-17R axis may provide an attractive target for the management of SAg-mediated illnesses.
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Affiliation(s)
- Peter A Szabo
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | - Ankur Goswami
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | - Delfina M Mazzuca
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | - Kyoungok Kim
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | - David B O'Gorman
- Cell and Molecular Biology Laboratory, Roth | McFarlane Hand and Upper Limb Centre, Western University, London, Ontario N6A 4V2, Canada
- Department of Biochemistry, Western University, London, Ontario N6A 5C1, Canada
- Lawson Health Research Institute, London, Ontario N6C 2R5, Canada
- Department of Surgery, Western University, London, Ontario N6A 4V2, Canada
| | - David A Hess
- Department of Physiology and Pharmacology, Western University, London, Ontario N6A 5C1, Canada
- Krembil Centre for Stem Cell Biology, Molecular Medicine Research Group, Robarts Research Institute, London, Ontario N6A 5B7, Canada
| | - Ian D Welch
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 2B5, Canada
| | - Howard A Young
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute-Frederick, Frederick, MD 21702
| | - Bhagirath Singh
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
- Lawson Health Research Institute, London, Ontario N6C 2R5, Canada
- Centre for Human Immunology, Western University, London, Ontario N6A 5C1, Canada; and
| | - John K McCormick
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
- Lawson Health Research Institute, London, Ontario N6C 2R5, Canada
- Centre for Human Immunology, Western University, London, Ontario N6A 5C1, Canada; and
| | - S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada;
- Lawson Health Research Institute, London, Ontario N6C 2R5, Canada
- Centre for Human Immunology, Western University, London, Ontario N6A 5C1, Canada; and
- Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Ontario N6A 5A5, Canada
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46
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IL-33/ST2 immune responses to respiratory bacteria in pediatric asthma. Sci Rep 2017; 7:43426. [PMID: 28262704 PMCID: PMC5338274 DOI: 10.1038/srep43426] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 01/24/2017] [Indexed: 12/18/2022] Open
Abstract
Here we investigated the relationship between local bacterial colonization and anti-bacterial immune responses in pre-school asthmatic and control children within the EU-wide study PreDicta. In this cohort of pre-school asthmatic children, nasopharyngeal colonization with Gram-negative bacteria such as Haemophilus influenzae and Moraxella catarrhalis was found to be associated with the highest interferon beta (IFNβ) and IL-33 levels in the nasal pharyngeal fluids (NPF). IL33R-ST2 was found induced in the blood of asthmatic children with additional Gram + bacteria in the nasopharynx (Gr+/−). Furthermore, asthmatic children had more episodes of infection that required antibiotic therapy than the control group. Treatment with antibiotics associated with reduced ST2 in blood cells of both asthmatic and control children and reduced IL-33 levels in the airways of asthmatic children. In the absence of Staphylococcus (S.) aureus in NPF, antibiotic therapy associated with decreased IL-33 levels in the NPF and lower ST2 values in the blood of control children but not of asthmatic children. These data suggest that, in asthmatic children, Gram- bacteria, which persist after antibiotic therapy, contributes to IL-33 locally and associated with Gr + bacteria colonization in the airways, inhibited IFN-β and in the absence of Staphylococcus (S.) aureus, induced ST2 bearing cells in their blood.
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Abstract
Toxic shock syndrome (TSS) represents a heterogeneous group of disorders that results in hypotension, multiorgan system involvement, and a characteristic rash or soft tissue infection caused by staphylococcal or streptococcal exotoxins and enterotoxins. Staphylococcal TSS emerged in the late 1970s as an illness associated with highly absorbent tampons; subsequently it has been described with postoperative infections, burns, and various viral illnesses. Although the morbidity rate associated with staphylococcal TSS may be high, the mortality rate approximates 5%. Streptococcal TSS has emerged in the 1980s and into the 1990s as a disorder that results in rapid progression of soft tissue infection in the form of cellulitis, myositis, or necrotizing fasciitis due to pyogenic streptococcal group A exotoxin. The rapidity of progression of local infection to hypotension and multiorgan failure results in a mortality rate of 30–70%. In both forms of TSS, staphylococcal and streptococcal exotoxins function as superantigens, a unique mechanism of immune activation that results in an exuberant T-cell response and profound cytokine expression. The role of antibiotics is reviewed. The use of clindamycin in streptococcal TSS and the potential therapeutic role of intravenous immunoglobulin in both forms of this disorder are discussed as well.
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Affiliation(s)
- Paul F. Dellaripa
- Section of Pulmonary and Critical Care Medicine and Section of Rheumatology, Lahey Clinic Medical Center, Burlington, MA
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48
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Zhang G, Xu M, Zhang H, Song Y, Wang J, Zhang C. Up-regulation of granzyme B and perforin by staphylococcal enterotoxin C2 mutant induces enhanced cytotoxicity in Hepa1–6 cells. Toxicol Appl Pharmacol 2016; 313:1-9. [DOI: 10.1016/j.taap.2016.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/24/2016] [Accepted: 10/10/2016] [Indexed: 11/25/2022]
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49
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Heink S, Yogev N, Garbers C, Herwerth M, Aly L, Gasperi C, Husterer V, Croxford AL, Möller-Hackbarth K, Bartsch HS, Sotlar K, Krebs S, Regen T, Blum H, Hemmer B, Misgeld T, Wunderlich TF, Hidalgo J, Oukka M, Rose-John S, Schmidt-Supprian M, Waisman A, Korn T. Trans-presentation of IL-6 by dendritic cells is required for the priming of pathogenic T H17 cells. Nat Immunol 2016; 18:74-85. [PMID: 27893700 PMCID: PMC5164931 DOI: 10.1038/ni.3632] [Citation(s) in RCA: 275] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 11/04/2016] [Indexed: 12/16/2022]
Abstract
The cellular sources of interleukin-6 (IL-6) that are relevant for the differentiation of TH17 cells remain unclear. Here, we used a novel strategy of IL-6 conditional deletion of distinct IL-6-producing cell types to show that Sirpα+ dendritic cells (DC) were essential for the generation of pathogenic TH17 cells. During the process of cognate interaction, Sirpα+ DCs trans-presented IL-6 to T cells using their own IL-6Rα. While ambient IL-6 was sufficient to suppress the induction of the transcription factor Foxp3 in T cells, IL-6 trans-presentation by DC-bound IL-6Rα (here defined as IL-6 cluster signaling) was required to prevent premature induction of IFN-γ in T cells and to generate pathogenic TH17 cells in vivo. These findings will guide therapeutic approaches for TH17-mediated autoimmune diseases.
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Affiliation(s)
- Sylvia Heink
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany
| | - Nir Yogev
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | | | - Marina Herwerth
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany.,Institute of Neuronal Cell Biology, Technical University of Munich, Munich, Germany
| | - Lilian Aly
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany
| | - Christiane Gasperi
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany
| | - Veronika Husterer
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany
| | - Andrew L Croxford
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | | | - Harald S Bartsch
- Institute of Pathology, Medical School, Ludwig-Maximilians-University, Munich, Germany
| | - Karl Sotlar
- Institute of Pathology, Medical School, Ludwig-Maximilians-University, Munich, Germany
| | - Stefan Krebs
- Gene Centre, Lafuga, Ludwig-Maximilians-University, Munich, Germany
| | - Tommy Regen
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Helmut Blum
- Gene Centre, Lafuga, Ludwig-Maximilians-University, Munich, Germany
| | - Bernhard Hemmer
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Thomas Misgeld
- Institute of Neuronal Cell Biology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | | | - Juan Hidalgo
- Department of Cellular Biology, Physiology, and Immunology, Autonomous University of Barcelona, Barcelona, Spain
| | - Mohamed Oukka
- Department of Immunology, University of Washington, Seattle, Washington, USA.,Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, USA
| | | | - Marc Schmidt-Supprian
- Department of Hematology and Oncology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Ari Waisman
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Thomas Korn
- Klinikum rechts der Isar, Department of Neurology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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50
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Tao L, Zhang C, Zhang J, Sun Y, Li X, Yan K, Jin B, Zhang Z, Yang K. Sensitive chemiluminescence immunoassay for staphylococcal enterotoxin C1 based on the use of dye-encapsulated mesoporous silica nanoparticles. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1849-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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