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Lani R, Thariq IM, Suhaimi NS, Hassandarvish P, Abu Bakar S. From defense to offense: Modulating toll-like receptors to combat arbovirus infections. Hum Vaccin Immunother 2024; 20:2306675. [PMID: 38263674 DOI: 10.1080/21645515.2024.2306675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/14/2024] [Indexed: 01/25/2024] Open
Abstract
Arboviruses are a significant threat to global public health, with outbreaks occurring worldwide. Toll-like receptors (TLRs) play a crucial role in the innate immune response against these viruses by recognizing pathogen-associated molecular patterns and initiating an inflammatory response. Significantly, TLRs commonly implicated in the immune response against viral infections include TLR2, TLR4, TLR6, TLR3, TLR7, and TLR8; limiting or allowing them to replicate and spread within the host. Modulating TLRs has emerged as a promising approach to combat arbovirus infections. This review summarizes recent advances in TLR modulation as a therapeutic target in arbovirus infections. Studies have shown that the activation of TLRs can enhance the immune response against arbovirus infections, leading to increased viral clearance and protection against disease. Conversely, inhibition of TLRs can reduce the excessive inflammation and tissue damage associated with arbovirus infection. Modulating TLRs represents a potential therapeutic strategy to combat arbovirus infections.
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Affiliation(s)
- Rafidah Lani
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Ilya Maisarah Thariq
- Tropical Infectious Diseases Research and Education Centre, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Nuramira Syazreen Suhaimi
- Tropical Infectious Diseases Research and Education Centre, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Pouya Hassandarvish
- Tropical Infectious Diseases Research and Education Centre, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Sazaly Abu Bakar
- Tropical Infectious Diseases Research and Education Centre, Universiti Malaya, Kuala Lumpur, Malaysia
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2
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Niso-Santano M, Fuentes JM, Galluzzi L. Immunological aspects of central neurodegeneration. Cell Discov 2024; 10:41. [PMID: 38594240 PMCID: PMC11004155 DOI: 10.1038/s41421-024-00666-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 03/02/2024] [Indexed: 04/11/2024] Open
Abstract
The etiology of various neurodegenerative disorders that mainly affect the central nervous system including (but not limited to) Alzheimer's disease, Parkinson's disease and Huntington's disease has classically been attributed to neuronal defects that culminate with the loss of specific neuronal populations. However, accumulating evidence suggests that numerous immune effector cells and the products thereof (including cytokines and other soluble mediators) have a major impact on the pathogenesis and/or severity of these and other neurodegenerative syndromes. These observations not only add to our understanding of neurodegenerative conditions but also imply that (at least in some cases) therapeutic strategies targeting immune cells or their products may mediate clinically relevant neuroprotective effects. Here, we critically discuss immunological mechanisms of central neurodegeneration and propose potential strategies to correct neurodegeneration-associated immunological dysfunction with therapeutic purposes.
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Affiliation(s)
- Mireia Niso-Santano
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain.
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carlos III (CIBER-CIBERNED-ISCIII), Madrid, Spain.
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain.
| | - José M Fuentes
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carlos III (CIBER-CIBERNED-ISCIII), Madrid, Spain
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain
| | - Lorenzo Galluzzi
- Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA.
- Sandra and Edward Meyer Cancer Center, New York, NY, USA.
- Caryl and Israel Englander Institute for Precision Medicine, New York, NY, USA.
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3
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Li L, Wang J, Zhong X, Jiang Y, Pei G, Yang X, Zhang K, Shen S, Jin X, Sun G, Su C, Chen S, Yin H. ADP-Hep-Induced Liquid Phase Condensation of TIFA-TRAF6 Activates ALPK1/TIFA-Dependent Innate Immune Responses. RESEARCH (WASHINGTON, D.C.) 2024; 7:0315. [PMID: 38357697 PMCID: PMC10865109 DOI: 10.34133/research.0315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/19/2024] [Indexed: 02/16/2024]
Abstract
The ALPK1 (alpha-kinase 1)-TIFA (TRAF-interacting protein with fork head-associated domain)-TRAF6 signaling pathway plays a pivotal role in regulating inflammatory processes, with TIFA and TRAF6 serving as key molecules in this cascade. Despite its significance, the functional mechanism of TIFA-TRAF6 remains incompletely understood. In this study, we unveil that TIFA undergoes liquid-liquid phase separation (LLPS) induced by ALPK1 in response to adenosine diphosphate (ADP)-β-D-manno-heptose (ADP-Hep) recognition. The phase separation of TIFA is primarily driven by ALPK1, the pT9-FHA domain, and the intrinsically disordered region segment. Simultaneously, TRAF6 exhibits phase separation during ADP-Hep-induced inflammation, a phenomenon observed consistently across various inflammatory signal pathways. Moreover, TRAF6 is recruited within the TIFA condensates, facilitating lysine (K) 63-linked polyubiquitin chain synthesis. The subsequent recruitment, enrichment, and activation of downstream effectors within these condensates contribute to robust inflammatory signal transduction. Utilizing a novel chemical probe (compound 22), our analysis demonstrates that the activation of the ALPK1-TIFA-TRAF6 signaling pathway in response to small molecules necessitates the phase separation of TIFA. In summary, our findings reveal TIFA as a sensor for upstream signals, initiating the LLPS of itself and downstream proteins. This process results in the formation of membraneless condensates within the ALPK1-TIFA-TRAF6 pathway, suggesting potential applications in therapeutic biotechnology development.
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Affiliation(s)
- Liping Li
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
- Department of Cancer Research, Institute of Medicinal Biotechnology,
Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jia Wang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
- State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, College of Future Technology,
Peking University, Beijing, China
| | - Xincheng Zhong
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Yaoyao Jiang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Gaofeng Pei
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
- School of Life Sciences,
Tsinghua University, Beijing, 100084, China
| | - Xikang Yang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Kaixiang Zhang
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Siqi Shen
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Xue Jin
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Gaoge Sun
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Chaofei Su
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Shuzhen Chen
- Department of Cancer Research, Institute of Medicinal Biotechnology,
Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Hang Yin
- State Key Laboratory of Membrane Biology, School of Pharmaceutical Sciences, Institute for Precision Medicine, Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorous chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
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Fang ZE, Wang Y, Bian S, Qin S, Zhao H, Wen J, Liu T, Ren L, Li Q, Shi W, Zhao J, Yang H, Peng R, Wang Q, Bai Z, Xu G. Helenine blocks NLRP3 activation by disrupting the NEK7-NLRP3 interaction and ameliorates inflammatory diseases. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 122:155159. [PMID: 37931457 DOI: 10.1016/j.phymed.2023.155159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 09/19/2023] [Accepted: 10/19/2023] [Indexed: 11/08/2023]
Abstract
BACKGROUND The involvement of NLRP3 inflammasome is associated with the progress of numerous inflammatory conditions. However, there is currently no single compound used in the clinic. Search for the inhibitor of NLRP3 inflammasome from natural products is an attractive direction. The compound Helenin (Hel), which is obtained from Inula helenium L., is reported to have anti-inflammatory activities. However, the underlying molecular mechanisms and specific inflammatory signal pathway remains not well understood. PURPOSE This research aims to determine the impacts of Hel on NLRP3 inflammasome and the underlying mechanism involved, meanwhile also assessing its potential as a therapeutic intervention for inflammatory diseases mediated by NLRP3 overactivation. METHODS Pretreated with Hel in BMDMs (bone marrow-derived macrophages), then stimulated with NLRP3 triggers and measured the expression of active caspase-1 and interleukin 1β (IL-1β). Determination of intracellular K+ and Ca2+, ASC oligomerization and mitochondrial reactive oxygen species (mtROS) production were employed to explore the preliminary mechanism of Hel on NLRP3 activation. Subsequently, Co-immunoprecipitation was used to investigate protein-protein interaction and reduction of covalent bonds of Hel was to explore the binding mode between drugs and proteins. Finally, in vivo experiments, we utilized mouse lethal sepsis and monosodium urate(MSU)-induced peritonitis models to evaluate the effectiveness of Hel in inhibiting inflammatory diseases. RESULTS The findings revealed that Hel exhibited a specific blocking effect on NLRP3, with no impact on the assembly of NLRC4 and AIM2 inflammasome. Through the analysis of mechanisms targeting key upstream factors in NLRP3 activation, Hel inhibited NLRP3-dependent ASC oligomerization but did not regulating inflammasome priming, K+ efflux, Ca2+ influx, or mitochondrial damage and mtROS. Moreover, Hel effectively interrupted the binding of NEK7-NLRP3, which was dependent on the active double C=C of the α,β-unsaturated carbonyl units in Hel. In mouse models, Hel showed promising therapeutic effects in the treatment of NLRP3 overactivation-associated diseases, including the lethal sepsis and acute systemic inflammation induced by lipopolysaccharide (LPS) and peritonitis induced by MSU. CONCLUSION Our results indicate that Hel dependent α,β-unsaturated carbonyl units interrupt the formation of the NLRP3-NEK7 interaction, thereby blocks the inflammasome assemblage and activation. These fundings would suggest that Hel is a promising inhibitor for treating diseases driven by NLRP3 overactivation.
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Affiliation(s)
- Zhi-E Fang
- Department of Pharmacy, Chongqing Hospital of Traditional Chinese Medicine, Chongqing 400021, China; Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Yan Wang
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China; School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100105, China
| | - Shuyi Bian
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China
| | - Shuanglin Qin
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China; School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Huanying Zhao
- Core Facilities Center, Capital Medical University, Beijing, 100069, China
| | - Jincai Wen
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Tingting Liu
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Lutong Ren
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Qiang Li
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Wei Shi
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Jia Zhao
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Huijie Yang
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China
| | - Rui Peng
- School of Pharmacy, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Qin Wang
- Department of Pharmacy, Chongqing Hospital of Traditional Chinese Medicine, Chongqing 400021, China.
| | - Zhaofang Bai
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing 100039, China.
| | - Guang Xu
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China.
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Isazadeh A, Heris JA, Shahabi P, Mohammadinasab R, Shomali N, Nasiri H, Valedkarimi Z, Khosroshahi AJ, Hajazimian S, Akbari M, Sadeghvand S. Pattern-recognition receptors (PRRs) in SARS-CoV-2. Life Sci 2023; 329:121940. [PMID: 37451397 DOI: 10.1016/j.lfs.2023.121940] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Pattern recognition receptors (PRRs) are specific sensors that directly recognize various molecules derived from viral or bacterial pathogens, senescent cells, damaged cells, and apoptotic cells. These sensors act as a bridge between nonspecific and specific immunity in humans. PRRs in human innate immunity were classified into six types: toll-like receptors (TLR), C-type lectin receptors (CLRs), nucleotide-binding and oligomerization domain (NOD)-like receptors (NLRs), absent in melanoma 2 (AIM2)-like receptors (ALRs), retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs), and cyclic GMP-AMP (cGAMP) synthase (cGAS). Numerous types of PRRs are responsible for recognizing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, which is immensely effective in prompting interferon responses. Detection of SARS-CoV-2 infection by PRRs causes the initiation of an intracellular signaling cascade and subsequently the activation of various transcription factors that stimulate the production of cytokines, chemokines, and other immune-related factors. Therefore, it seems that PRRs are a promising potential therapeutic approach for combating SARS-CoV-2 infection and other microbial infections. In this review, we have introduced the current knowledge of various PRRs and related signaling pathways in response to SARS-CoV-2.
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Affiliation(s)
- Alireza Isazadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Javad Ahmadian Heris
- Department of Allergy and Clinical Immunology, Pediatric Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parviz Shahabi
- Department of Physiology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Mohammadinasab
- Department of History of Medicine, School of Traditional Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Navid Shomali
- Department of Immunology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Nasiri
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Valedkarimi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Saba Hajazimian
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Morteza Akbari
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Shahram Sadeghvand
- Department of Pediatrics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
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Song S, Lin Z, Zhao C, Wen J, Chen J, Xie S, Qi H, Wang J, Su X. Vagal-mAChR4 signaling promotes Friend virus complex (FV)-induced acute erythroleukemia. Virol Sin 2023:S1995-820X(23)00053-6. [PMID: 37172825 DOI: 10.1016/j.virs.2023.05.005] [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: 07/04/2022] [Accepted: 05/08/2023] [Indexed: 05/15/2023] Open
Abstract
Erythroleukemia belongs to acute myeloid leukemia (AML) type 6 (M6), and treatment remains difficult due to the poor prognosis of the disease. Friend virus (FV) is a complex of two viruses: Friend murine leukemia virus (F-MuLV) strain along with a defective spleen focus forming virus (SFFV), which can induce acute erythroleukemia in mice. We have previously reported that activation of vagal α7 nicotinic acetylcholine receptor (nAChR) signaling promotes HIV-1 transcription. Whether vagal muscarinic signaling mediates FV-induced erythroleukemia and the underlying mechanisms remain unclear. In this study, sham and vagotomized mice were intraperitoneally injected with FV. FV infection caused anemia in sham mice, and vagotomy reversed this change. FV infection increased erythroblasts ProE, EryA, and EryB cells in the spleen, and these changes were blocked by vagotomy. In bone marrow, FV infection reduced EryC cells in sham mice, an effect that was counteracted by vagotomy. FV infection increased choline acetyltransferase (ChAT) expression in splenic CD4+ and CD8+ T cells, and this change was reversed by vagotomy. Furthermore, the increase of EryA and EryB cells in spleen of FV-infected wild-type mice was reversed after deletion of ChAT in CD4+ T cells. In bone marrow, FV infection reduced EryB and EryC cells in sham mice, whereas lack of ChAT in CD4+ T cells did not affect this change. Activation of muscarinic acetylcholine receptor 4 (mAChR4) by clozapine N-oxide (CNO) significantly increased EryB in the spleen but decreased the EryC cell population in the bone marrow of FV-infected mice. Thus, vagal-mAChR4 signaling in the spleen and bone marrow synergistically promotes the pathogenesis of acute erythroleukemia. We uncover an unrecognized mechanism of neuromodulation in erythroleukemia.
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Affiliation(s)
- Shuting Song
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Zhekai Lin
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Caiqi Zhao
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Jing Wen
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Jie Chen
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Shitao Xie
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Huaxin Qi
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Jianhua Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Xiao Su
- Unit of Respiratory Infection and Immunity, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 101408, China; Shanghai Key Laboratory of Lung Inflammation and Injury, Shanghai, 200031, China.
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Mitropoulou G, Stavropoulou E, Vaou N, Tsakris Z, Voidarou C, Tsiotsias A, Tsigalou C, Taban BM, Kourkoutas Y, Bezirtzoglou E. Insights into Antimicrobial and Anti-Inflammatory Applications of Plant Bioactive Compounds. Microorganisms 2023; 11:1156. [PMID: 37317131 DOI: 10.3390/microorganisms11051156] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 06/16/2023] Open
Abstract
Plants have long been thought to contribute to health promotion due to their fiber and phenolic content, as well as their inherent biological potential. The bioactive derivatives of medicinal plants are a valuable resource in the fight against serious diseases all around the world. The present review focuses on the current state of knowledge on the usage and medicinal applications of plant bioactives. Issues concerning the effect of aromatic plant derivatives on human gut microbiota and their antimicrobial and anti-inflammatory potentials are discussed and worth further exploring.
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Affiliation(s)
- Gregoria Mitropoulou
- Laboratory of Applied Microbiology and Biotechnology, Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Elisavet Stavropoulou
- Department of Infectious Diseases, Centre Hospitalier Universitaire Vaudois (CHUV), 1101 Lausanne, Switzerland
| | - Natalia Vaou
- Laboratory of Hygiene and Environmental Protection, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Zacharias Tsakris
- Laboratory of Microbiology, Department of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Chrysa Voidarou
- Department of Agriculture, University of Ioannina, 47132 Arta, Greece
| | - Arsenis Tsiotsias
- Department of Obstetrics, University of Western Macedonia, 50200 Ptolemaida, Greece
| | - Christina Tsigalou
- Laboratory of Microbiology, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Birce Mercanoglou Taban
- Dairy Technology Department, Faculty of Agriculture, Veterinary and Agriculture Campus, Ankara University, Diskapi, Ankara 06110, Turkey
| | - Yiannis Kourkoutas
- Laboratory of Applied Microbiology and Biotechnology, Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Eugenia Bezirtzoglou
- Laboratory of Hygiene and Environmental Protection, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
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Rao JS, Ivkov R, Sharma A. Nanoparticle-Based Interventions for Liver Transplantation. Int J Mol Sci 2023; 24:7496. [PMID: 37108659 PMCID: PMC10144867 DOI: 10.3390/ijms24087496] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/29/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Liver transplantation is the only treatment for hepatic insufficiency as a result of acute and chronic liver injuries/pathologies that fail to recover. Unfortunately, there remains an enormous and growing gap between organ supply and demand. Although recipients on the liver transplantation waitlist have significantly higher mortality, livers are often not allocated because they are (i) classified as extended criteria or marginal livers and (ii) subjected to longer cold preservation time (>6 h) with a direct correlation of poor outcomes with longer cold ischemia. Downregulating the recipient's innate immune response to successfully tolerate a graft having longer cold ischemia times or ischemia-reperfusion injury through induction of immune tolerance in the graft and the host would significantly improve organ utilization and post-transplant outcomes. Broadly, technologies proposed for development aim to extend the life of the transplanted liver through post-transplant or recipient conditioning. In this review, we focus on the potential benefits of nanotechnology to provide unique pre-transplant grafting and recipient conditioning of extended criteria donor livers using immune tolerance induction and hyperthermic pre-conditioning.
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Affiliation(s)
- Joseph Sushil Rao
- Division of Solid Organ Transplantation, Department of Surgery, University of Minnesota, Minneapolis, MN 55455, USA
- Schulze Diabetes Institute, Department of Surgery, University of Minnesota, Minneapolis, MN 55455, USA
| | - Robert Ivkov
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
- Department of Oncology, Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Mechanical Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Anirudh Sharma
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
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9
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Song Y, Fan H, Tang X, Luo Y, Liu P, Chen Y. The effects of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on ischemic stroke and the possible underlying mechanisms. Int J Neurosci 2023; 133:176-185. [PMID: 33653215 PMCID: PMC8006265 DOI: 10.1080/00207454.2021.1897588] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 12/05/2020] [Accepted: 02/14/2021] [Indexed: 02/01/2023]
Abstract
Purpose: As of November 28, 2020, COVID-19 has been reported in 220 countries with 61,036,793 confirmed cases and 1,433,316 confirmed deaths; countries became vigilant around the world. In addition to SARS-CoV-2 causing pneumonia, many studies have reported ischemic stroke in patients with COVID-19. This article describes the effects and possible underlying mechanisms of SARS-CoV-2 on ischemic stroke.Materials and methods: A literature search was performed using PubMed, Web of Science, and other COVID-dedicated databases and the combination of the keywords 'SARS-CoV-2', 'COVID-19' and 'ischemic stroke' up to November 28, 2020.Results: SARS-CoV-2 invades the host through angiotensin converting enzyme 2 (ACE2). ACE2 is expressed not only in the lungs, but also in the brain and vascular endothelial cells. SARS-CoV-2 infection might cause direct vascular disease or enhance the immunogenic thrombosis environment through several mechanisms. SARS-CoV-2 infection can modulate the host immune response and can cause inflammation, coagulation disorders, renin angiotensin system disorders, hypoxia, and stress disorders, which may lead to the occurrence of ischemic stroke.Conclusions: Some patients with COVID-19 can develop ischemic stroke. Ischemic stroke has a high risk of causing disability and is associated with a high mortality rate. It is hoped that when medical staff treat patients with COVID-19, they would pay attention to the occurrence of ischemic stroke to improve the prognosis of patients with COVID-19.
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Affiliation(s)
- Yuxia Song
- Department of Neurology, Dalian Medical University, Dalian, Liaoning, China
- Department of Neurology, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu, China
| | - Hongyang Fan
- Department of Neurology, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu, China
| | - XiaoJia Tang
- Department of Neurology, Dalian Medical University, Dalian, Liaoning, China
- Department of Neurology, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yuhan Luo
- Department of Neurology, Dalian Medical University, Dalian, Liaoning, China
- Department of Neurology, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu, China
| | - Peipei Liu
- Department of Neurology, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu, China
- Department of Neurology, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu, China
| | - Yingzhu Chen
- Department of Neurology, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu, China
- Department of Neurology, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu, China
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10
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Kayongo A, Robertson NM, Siddharthan T, Ntayi ML, Ndawula JC, Sande OJ, Bagaya BS, Kirenga B, Mayanja-Kizza H, Joloba ML, Forslund SK. Airway microbiome-immune crosstalk in chronic obstructive pulmonary disease. Front Immunol 2023; 13:1085551. [PMID: 36741369 PMCID: PMC9890194 DOI: 10.3389/fimmu.2022.1085551] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 12/28/2022] [Indexed: 01/19/2023] Open
Abstract
Chronic Obstructive Pulmonary Disease (COPD) has significantly contributed to global mortality, with three million deaths reported annually. This impact is expected to increase over the next 40 years, with approximately 5 million people predicted to succumb to COPD-related deaths annually. Immune mechanisms driving disease progression have not been fully elucidated. Airway microbiota have been implicated. However, it is still unclear how changes in the airway microbiome drive persistent immune activation and consequent lung damage. Mechanisms mediating microbiome-immune crosstalk in the airways remain unclear. In this review, we examine how dysbiosis mediates airway inflammation in COPD. We give a detailed account of how airway commensal bacteria interact with the mucosal innate and adaptive immune system to regulate immune responses in healthy or diseased airways. Immune-phenotyping airway microbiota could advance COPD immunotherapeutics and identify key open questions that future research must address to further such translation.
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Affiliation(s)
- Alex Kayongo
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda,Department of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda,Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda,Department of Medicine, Center for Emerging Pathogens, Rutgers, The State University of New Jersey, New Jersey Medical School, Newark, NJ, United States
| | | | - Trishul Siddharthan
- Division of Pulmonary Medicine, School of Medicine, University of Miami, Miami, FL, United States
| | - Moses Levi Ntayi
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda,Department of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda,Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Josephine Caren Ndawula
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda
| | - Obondo J. Sande
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Bernard S. Bagaya
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Bruce Kirenga
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda
| | - Harriet Mayanja-Kizza
- Department of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Moses L. Joloba
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Sofia K. Forslund
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany,Experimental and Clinical Research Center, a cooperation of Charité - Universitatsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany,Charité-Universitatsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Berlin, Germany,Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany,*Correspondence: Sofia K. Forslund,
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11
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Pan F, Ma X, Tang X, Xing J, Sheng X, Chi H, Zhan W. Genome characterization of Hirame novirhabdovirus (HIRRV) isolate CNPo2015 and transcriptome analysis of Hirame natural embryo (HINAE) cells infected with CNPo2015. FISH & SHELLFISH IMMUNOLOGY 2023; 132:108493. [PMID: 36509411 DOI: 10.1016/j.fsi.2022.108493] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/02/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Hirame novirhabdovirus (HIRRV) is a fish rhabdovirus belonging to family Rhabdoviridae, genus Novirhabdovirus, which is highly contagious and virulent, and causes hemorrhagic disease in many fish species. In the present work, the whole genome sequence of HIRRV strain CNPo2015 that previously isolated from cultured flounders was obtained using high-throughput sequencing. It consists of 10,998 nucleotides and encodes six viral proteins arranged in order of 3'-N-P-M-G-NV-L-5'. Among Novirhabdovirus, L protein of CNPo2015 possessed the lowest amino acid sequence divergence with HIRRV isolate CA 9703 and HIRRV 080113, and the highest with Snakehead rhabdovirus. Furthermore, the immune response of Hirame natural embryo (HINAE) cell line to HIRRV infection was characterized by RNA-seq, and the results showed that 1976 differentially expressed genes (DEGs) including 1219 up-regulated and 727 down-regulated genes were identified in the HINAE cells infected with HIRRV at 48 h post infection (hpi). Several KEGG pathways were significantly enriched in the viral infected cells, such as cytokine-cytokine receptor interaction, JAK-STAT signaling pathway, cell cycle, apoptosis, RIG-I-like receptors signaling pathway and P13K-AKT signaling pathway. Post viral infection, the flow cytometric Annexin V/PI assay found that apoptotic rate of HINAE cells showed a slight increase within 3 days and then the early and late apoptotic rate were significantly increased to 41 ± 2.65% and 12.37 ± 2.61% at day 4, respectively. Meanwhile, qRT-PCR results also showed that six apoptosis-related genes (BCL2L1, CASPASE 3, CASPASE 10, FAS, AKT and CDK1) were significantly upregulated. This investigation has not only enriched our knowledge of sequence difference characteristics between CNPo2015 and other Novirhabdoviruses, but also provided a data basis for deeper understanding of immune responses in flounder cells post viral infection.
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Affiliation(s)
- Fenghuang Pan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Xinbiao Ma
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China.
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
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12
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Exhaustion and over-activation of immune cells in COVID-19: Challenges and therapeutic opportunities. Clin Immunol 2022; 245:109177. [PMCID: PMC9640209 DOI: 10.1016/j.clim.2022.109177] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/19/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022]
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13
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Lim SH, Kim K, Choi CI. Pharmacogenomics of Monoclonal Antibodies for the Treatment of Rheumatoid Arthritis. J Pers Med 2022; 12:jpm12081265. [PMID: 36013214 PMCID: PMC9410311 DOI: 10.3390/jpm12081265] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 11/16/2022] Open
Abstract
Precision medicine refers to a highly individualized and personalized approach to patient care. Pharmacogenomics is the study of how an individual’s genomic profile affects their drug response, enabling stable and effective drug selection, minimizing side effects, and maximizing therapeutic efficacy. Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic inflammation in the joints. It mainly starts in peripheral joints, such as the hands and feet, and progresses to large joints, which causes joint deformation and bone damage due to inflammation of the synovial membrane. Here, we review various pharmacogenetic studies investigating the association between clinical response to monoclonal antibody therapy and their target genetic polymorphisms. Numerous papers have reported that some single nucleotide polymorphisms (SNPs) are related to the therapeutic response of several monoclonal antibody drugs including adalimumab, infliximab, rituximab, and tocilizumab, which target tumor necrosis factor (TNF), CD20 of B-cells, and interleukin (IL)-6. Additionally, there are some pharmacogenomic studies reporting on the association between the clinical response of monoclonal antibodies having various mechanisms, such as IL-1, IL-17, IL-23, granulocyte-macrophage colony-stimulating factor (GM-CSF) and the receptor activator of nuclear factor-kappa B (RANK) inhibition. Biological therapies are currently prescribed on a “trial and error” basis for RA patients. If appropriate drug treatment is not started early, joints may deform, and long-term treatment outcomes may worsen. Pharmacogenomic approaches that predict therapeutic responses for RA patients have the potential to significantly improve patient quality of life and reduce treatment costs.
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Affiliation(s)
- Sung Ho Lim
- Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea;
| | - Khangyoo Kim
- College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea;
| | - Chang-Ik Choi
- Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University-Seoul, Goyang 10326, Korea;
- Correspondence: ; Tel.: +82-31-961-5230
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14
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Mekonnen D, Mengist HM, Jin T. SARS-CoV-2 subunit vaccine adjuvants and their signaling pathways. Expert Rev Vaccines 2022; 21:69-81. [PMID: 34633259 PMCID: PMC8567292 DOI: 10.1080/14760584.2021.1991794] [Citation(s) in RCA: 16] [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: 06/08/2021] [Accepted: 10/07/2021] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Vaccines are the agreed upon weapon against the COVID-19 pandemic. This review discusses about COVID-19 subunit vaccines adjuvants and their signaling pathways, which could provide a glimpse into the selection of appropriate adjuvants for prospective vaccine development studies. AREAS COVERED In the introduction, a brief background about the SARS-CoV-2 pandemic, the vaccine development race and classes of vaccine adjuvants were provided. . The antigen, trial stage, and types of adjuvants were extracted from the included articles and thun assimilated. Finally, the pattern recognition receptors (PRRs), their classes, cognate adjuvants, and potential signaling pathways were comprehended. EXPERT OPINION Adjuvants are unsung heroes of subunit vaccines. The in silico studies are very vital in avoiding several costly trial errors and save much work times. The majority of the (pre)clinical studies are promising. It is encouraging that most of the selected adjuvants are novel. Much emphasis must be paid to the optimal paring of antigen-adjuvant-PRRs for obtaining the desired vaccine effect. A good subunit vaccine/adjuvant is one that has high efficacy, safety, dose sparing, and rapid seroconversion rate and broad spectrum of immune response. In the years to come, COVID-19 adjuvanted subunit vaccines are expected to have superior utility than any other vaccines for various reasons.
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Affiliation(s)
- Daniel Mekonnen
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Hylemariam Mihiretie Mengist
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, Cas Key Laboratory of Innate Immunity and Chronic Disease, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Department of Medical Laboratory Science, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Tengchuan Jin
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, Cas Key Laboratory of Innate Immunity and Chronic Disease, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China
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15
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The Potential of Mesenchymal Stem Cells for the Treatment of Cytokine Storm due to COVID-19. BIOMED RESEARCH INTERNATIONAL 2021; 2021:3178796. [PMID: 34840969 PMCID: PMC8626179 DOI: 10.1155/2021/3178796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/24/2021] [Accepted: 10/29/2021] [Indexed: 12/15/2022]
Abstract
The outbreak of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has seriously affected public health and social stability. The main route of the transmission is droplet transmission, where the oral cavity is the most important entry point to the body. Due to both the direct harmful effects of SARS-CoV-2 and disordered immune responses, some COVID-19 patients may progress to acute respiratory distress syndrome or even multiple organ failure. Genetic variants of SARS-CoV-2 have been emerging and circulating around the world. Currently, there is no internationally approved precise treatment for COVID-19. Mesenchymal stem cells (MSCs) can traffic and migrate towards the affected tissue, regulate both the innate and acquired immune systems, and participate in the process of healing. Here, we will discuss and investigate the mechanisms of immune disorder in COVID-19 and the therapeutic activity of MSCs, in particular human gingiva mesenchymal stem cells.
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16
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Iampietro M, Dumont C, Mathieu C, Spanier J, Robert J, Charpenay A, Dupichaud S, Dhondt KP, Aurine N, Pelissier R, Ferren M, Mély S, Gerlier D, Kalinke U, Horvat B. Activation of cGAS/STING pathway upon paramyxovirus infection. iScience 2021; 24:102519. [PMID: 34142033 PMCID: PMC8188492 DOI: 10.1016/j.isci.2021.102519] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/02/2021] [Accepted: 05/05/2021] [Indexed: 12/13/2022] Open
Abstract
During inflammatory diseases, cancer, and infection, the cGAS/STING pathway is known to recognize foreign or self-DNA in the cytosol and activate an innate immune response. Here, we report that negative-strand RNA paramyxoviruses, Nipah virus (NiV), and measles virus (MeV), can also trigger the cGAS/STING axis. Although mice deficient for MyD88, TRIF, and MAVS still moderately control NiV infection when compared with wild-type mice, additional STING deficiency resulted in 100% lethality, suggesting synergistic roles of these pathways in host protection. Moreover, deletion of cGAS or STING resulted in decreased type I interferon production with enhanced paramyxoviral infection in both human and murine cells. Finally, the phosphorylation and ubiquitination of STING, observed during viral infections, confirmed the activation of cGAS/STING pathway by NiV and MeV. Our data suggest that cGAS/STING activation is critical in controlling paramyxovirus infection and possibly represents attractive targets to develop countermeasures against severe disease induced by these pathogens.
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Affiliation(s)
- Mathieu Iampietro
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Claire Dumont
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Cyrille Mathieu
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Julia Spanier
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection research, a joint venture between the Hanover Medical School and the Helmholtz Centre for Infection Research, Hanover, Germany
| | - Jonathan Robert
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Aude Charpenay
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Sébastien Dupichaud
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Kévin P. Dhondt
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Noémie Aurine
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Rodolphe Pelissier
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Marion Ferren
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Stéphane Mély
- INSERM- Laboratoire P4 Jean Mérieux-21 Avenue Tony Garnier, 69365 Lyon, France
| | - Denis Gerlier
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
| | - Ulrich Kalinke
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection research, a joint venture between the Hanover Medical School and the Helmholtz Centre for Infection Research, Hanover, Germany
- Cluster of Excellence-Resolving Infection Susceptibility (RESIST), Hanover, Germany
| | - Branka Horvat
- CIRI, Centre International de Recherche en Infectiologie, INSERM U1111, CNRS, UMR5308, Univ Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, 21 Avenue Tony Garnier, 69007 Lyon, France
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17
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Astaxanthin Protects Dendritic Cells from Lipopolysaccharide-Induced Immune Dysfunction. Mar Drugs 2021; 19:md19060346. [PMID: 34204220 PMCID: PMC8235365 DOI: 10.3390/md19060346] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 12/29/2022] Open
Abstract
Astaxanthin, originating from seafood, is a naturally occurring red carotenoid pigment. Previous studies have focused on its antioxidant properties; however, whether astaxanthin possesses a desired anti-inflammatory characteristic to regulate the dendritic cells (DCs) for sepsis therapy remains unknown. Here, we explored the effects of astaxanthin on the immune functions of murine DCs. Our results showed that astaxanthin reduced the expressions of LPS-induced inflammatory cytokines (TNF-α, IL-6, and IL-10) and phenotypic markers (MHCII, CD40, CD80, and CD86) by DCs. Moreover, astaxanthin promoted the endocytosis levels in LPS-treated DCs, and hindered the LPS-induced migration of DCs via downregulating CCR7 expression, and then abrogated allogeneic T cell proliferation. Furthermore, we found that astaxanthin inhibited the immune dysfunction of DCs induced by LPS via the activation of the HO-1/Nrf2 axis. Finally, astaxanthin with oral administration remarkably enhanced the survival rate of LPS-challenged mice. These data showed a new approach of astaxanthin for potential sepsis treatment through avoiding the immune dysfunction of DCs.
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18
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Kehrer T, García-Sastre A, Miorin L. Control of Innate Immune Activation by Severe Acute Respiratory Syndrome Coronavirus 2 and Other Coronaviruses. J Interferon Cytokine Res 2021; 41:205-219. [PMID: 34161170 PMCID: PMC8336211 DOI: 10.1089/jir.2021.0060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 05/07/2021] [Indexed: 12/25/2022] Open
Abstract
The ongoing coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), represents a public health crisis of unprecedented proportions. After the emergence of SARS-CoV-1 in 2002, and Middle East respiratory syndrome coronavirus (MERS-CoV) in 2012, this is the third outbreak of a highly pathogenic zoonotic coronavirus (CoV) that the world has witnessed in the last 2 decades. Infection with highly pathogenic human CoVs often results in a severe respiratory disease characterized by a delayed and blunted interferon (IFN) response, accompanied by an excessive production of proinflammatory cytokines. This indicates that CoVs developed effective mechanisms to overcome the host innate immune response and promote viral replication and pathogenesis. In this review, we describe the key innate immune signaling pathways that are activated during infection with SARS-CoV-2 and other well studied pathogenic CoVs. In addition, we summarize the main strategies that these viruses employ to modulate the host immune responses through the antagonism of IFN induction and effector pathways.
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Affiliation(s)
- Thomas Kehrer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Global Health Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Global Health Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Lisa Miorin
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Global Health Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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19
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Masum MA, Ichii O, Elewa YHA, Kon Y. Podocyte Injury Through Interaction Between Tlr8 and Its Endogenous Ligand miR-21 in Obstructed and Its Collateral Kidney. Front Immunol 2021; 11:606488. [PMID: 33552064 PMCID: PMC7862702 DOI: 10.3389/fimmu.2020.606488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 12/07/2020] [Indexed: 11/13/2022] Open
Abstract
While chronic kidney disease is prevalent in adults, obstructive nephropathy (ON) has been reported in both young and old patients. In ON, tubulointerstitial lesions (TILs) have been widely investigated, but glomerular lesions (GLs) have been largely neglected. Here, we show a novel mechanism underlying GL development in ON in young and old mice. TILs develop earlier than GLs owing to infiltration of inflammatory cells in the tubulointerstitium, but GLs develop following the activation of Toll-like receptor 8 (Tlr8) even though the absence of inflammatory cells infiltrating the glomerulus. TLR8 and interleukin 1 beta (IL1β) proteins colocalize with reducing podocyte function markers (PFMs), indicating the activation of TLR8 signaling in injured podocytes. Furthermore, glomerular and serum levels of miR-21, an endogenous ligand for Tlr8, were higher in the ON mouse model than in the sham control. The glomerular expression of Tlr8 positively correlates with miR-21 and the downstream cytokines Il1b and Il6 and negatively correlated with PFMs (Nphs1 and Synpo). We also show the colocalization of TLR8 and IL1β proteins with reducing PFMs in both obstructed and collateral kidney of young and old mice. Furthermore, in vitro study results revealed higher expression of Tlr8 and its downstream cytokines in glomeruli from obstructed kidneys following treatment with miR-21 mimic than in the control. In conclusion, the overexpression of Tlr8 may serve as a plausible mechanism underlying GL development in ON through podocyte injury.
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Affiliation(s)
- Md. Abdul Masum
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
- Department of Anatomy, Histology and Physiology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - Osamu Ichii
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
- Laboratory of Agrobiomedical Science, Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Yaser Hosny Ali Elewa
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
- Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Yasuhiro Kon
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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20
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García-Weber D, Arrieumerlou C. ADP-heptose: a bacterial PAMP detected by the host sensor ALPK1. Cell Mol Life Sci 2021; 78:17-29. [PMID: 32591860 PMCID: PMC11072087 DOI: 10.1007/s00018-020-03577-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 01/16/2023]
Abstract
The innate immune response constitutes the first line of defense against pathogens. It involves the recognition of pathogen-associated molecular patterns (PAMPs) by pathogen recognition receptors (PRRs), the production of inflammatory cytokines and the recruitment of immune cells to infection sites. Recently, ADP-heptose, a soluble intermediate of the lipopolysaccharide biosynthetic pathway in Gram-negative bacteria, has been identified by several research groups as a PAMP. Here, we recapitulate the evidence that led to this identification and discuss the controversy over the immunogenic properties of heptose 1,7-bisphosphate (HBP), another bacterial heptose previously defined as an activator of innate immunity. Then, we describe the mechanism of ADP-heptose sensing by alpha-protein kinase 1 (ALPK1) and its downstream signaling pathway that involves the proteins TIFA and TRAF6 and induces the activation of NF-κB and the secretion of inflammatory cytokines. Finally, we discuss possible delivery mechanisms of ADP-heptose in cells during infection, and propose new lines of thinking to further explore the roles of the ADP-heptose/ALPK1/TIFA axis in infections and its potential implication in the control of intestinal homeostasis.
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Affiliation(s)
- Diego García-Weber
- INSERM, U1016, Institut Cochin, CNRS, UMR8104, Université de Paris, 22 rue Méchain, 75014, Paris, France
| | - Cécile Arrieumerlou
- INSERM, U1016, Institut Cochin, CNRS, UMR8104, Université de Paris, 22 rue Méchain, 75014, Paris, France.
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21
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Stavropoulou E, Bezirtzoglou E. Probiotics as a Weapon in the Fight Against COVID-19. Front Nutr 2020; 7:614986. [PMID: 33385008 PMCID: PMC7769760 DOI: 10.3389/fnut.2020.614986] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/24/2020] [Indexed: 12/19/2022] Open
Affiliation(s)
- Elisavet Stavropoulou
- Department of Medicine, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.,Service of Infectious Diseases, Central Institute of Valais Hospitals, Sion, Switzerland.,Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Eugenia Bezirtzoglou
- Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
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22
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Karkossa I, Raps S, von Bergen M, Schubert K. Systematic Review of Multi-Omics Approaches to Investigate Toxicological Effects in Macrophages. Int J Mol Sci 2020; 21:E9371. [PMID: 33317022 PMCID: PMC7764599 DOI: 10.3390/ijms21249371] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/26/2020] [Accepted: 12/04/2020] [Indexed: 12/19/2022] Open
Abstract
Insights into the modes of action (MoAs) of xenobiotics are of utmost importance for the definition of adverse outcome pathways (AOPs), which are essential for a mechanism-based risk assessment. A well-established strategy to reveal MoAs of xenobiotics is the use of omics. However, often an even more comprehensive approach is needed, which can be achieved using multi-omics. Since the immune system plays a central role in the defense against foreign substances and pathogens, with the innate immune system building a first barrier, we systematically reviewed multi-omics studies investigating the effects of xenobiotics on macrophages. Surprisingly, only nine publications were identified, combining proteomics with transcriptomics or metabolomics. We summarized pathways and single proteins, transcripts, or metabolites, which were described to be affected upon treatment with xenobiotics in the reviewed studies, thus revealing a broad range of effects. In summary, we show that macrophages are a relevant model system to investigate the toxicological effects induced by xenobiotics. Furthermore, the multi-omics approaches led to a more comprehensive overview compared to only one omics layer with slight advantages for combinations that complement each other directly, e.g., proteome and metabolome.
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Affiliation(s)
- Isabel Karkossa
- Department of Molecular Systems Biology, Helmholtz-Centre for Environmental Research—UFZ, 04318 Leipzig, Germany; (I.K.); (S.R.); (M.v.B.)
| | - Stefanie Raps
- Department of Molecular Systems Biology, Helmholtz-Centre for Environmental Research—UFZ, 04318 Leipzig, Germany; (I.K.); (S.R.); (M.v.B.)
| | - Martin von Bergen
- Department of Molecular Systems Biology, Helmholtz-Centre for Environmental Research—UFZ, 04318 Leipzig, Germany; (I.K.); (S.R.); (M.v.B.)
- Institute of Biochemistry, Leipzig University, 04103 Leipzig, Germany
| | - Kristin Schubert
- Department of Molecular Systems Biology, Helmholtz-Centre for Environmental Research—UFZ, 04318 Leipzig, Germany; (I.K.); (S.R.); (M.v.B.)
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23
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Iqbal MS, Sardar N, Akmal W, Sultan R, Abdullah H, Qindeel M, Dhama K, Bilal M. ROLE OF TOLL-LIKE RECEPTORS IN CORONAVIRUS INFECTION AND IMMUNE RESPONSE. ACTA ACUST UNITED AC 2020. [DOI: 10.18006/2020.8(spl-1-sars-cov-2).s66.s78] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The emergence of a novel coronavirus referred to as SARS-CoV-2 has become a global health apprehension due to rapid transmission tendency, severity, and wide geographical spread. This emergence was started from Wuhan, China in 2019 from the zoonotic source and spread worldwide, infecting almost half of the community on this earth. Many of the receptors are involved in proceeding with this infection in the organism's body. Toll-like receptors (TLRs) play essential and protective functions from a wide range of microbial pathogens. Small setup of TLR adaptor proteins leads to activate nuclear factor kappa B (NF-kB) and interferon-regulatory factor (IRF). Consequently, various advanced inflammatory cytokines, chemokines, and interferon reaction properties can be up-regulated. Similarly, TLR flagging works on autophagy in macrophages. Autophagy is a cell response to starvation that helps to eliminate damaged cytosol organelles and persistent proteins. It is also able to prevent the replication of intracellular pathogens. Several microbes subvert the autophagy pathways to sustain their viability. This review investigates how TLRs can modulate a macrophagic system and analyze the role of natural resistance autophagy.
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24
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Lotfi M, Rezaei N. SARS-CoV-2: A comprehensive review from pathogenicity of the virus to clinical consequences. J Med Virol 2020; 92:1864-1874. [PMID: 32492197 PMCID: PMC7300719 DOI: 10.1002/jmv.26123] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/01/2020] [Indexed: 01/08/2023]
Abstract
Nowadays, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which caused novel coronavirus disease (COVID-19) pandemic, is the worldwide challenge. The virus is highly contagious, and clinical consequences were very divers. It is estimated that if no effective action is taken, COVID-19 could plague 90% of the world's population and kill over 40 million people. So, it is essential to understand the virus pathogenicity and follow the preventive methods to control the high morbidity and mortality rates. Meanwhile our current knowledge of COVID-19 is still limited, despite hard efforts of scientists and clinicians during last few months. In this review article, we have collected the latest data about characteristics, pathogenesis, clinical manifestations, and diagnostic methods of SARS-CoV-2.
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Affiliation(s)
- Melika Lotfi
- Department of ImmunologySchool of Medicine, Zanjan University of Medical SciencesZanjanIran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN)ZanjanIran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical SciencesTehranIran
- Department of ImmunologySchool of Medicine, Tehran University of Medical SciencesTehranIran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN)TehranIran
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25
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Stavropoulou E, Bezirtzoglou E. Probiotics in Medicine: A Long Debate. Front Immunol 2020; 11:2192. [PMID: 33072084 PMCID: PMC7544950 DOI: 10.3389/fimmu.2020.02192] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/11/2020] [Indexed: 12/12/2022] Open
Abstract
During the last years probiotics gained the attention of clinicians for their use in the prevention and treatment of multiple diseases. Probiotics main mechanisms of action include enhanced mucosal barrier function, direct antagonism with pathogens, inhibition of bacterial adherence and invasion capacity in the intestinal epithelium, boosting of the immune system and regulation of the central nervous system. It is accepted that there is a mutual communication between the gut microbiota and the liver, the so-called “microbiota-gut-liver axis” as well as a reciprocal communication between the intestinal microbiota and the central nervous system through the “microbiota-gut-brain axis.” Moreover, recently the “gut-lung axis” in bacterial and viral infections is considerably discussed for bacterial and viral infections, as the intestinal microbiota amplifies the alveolar macrophage activity having a protective role in the host defense against pneumonia. The importance of the normal human intestinal microbiota is recognized in the preservation of health. Disease states such as, infections, autoimmune conditions, allergy and other may occur when the intestinal balance is disturbed. Probiotics seem to be a promising approach to prevent and even reduce the symptoms of such clinical states as an adjuvant therapy by preserving the balance of the normal intestinal microbiota and improving the immune system. The present review states globally all different disorders in which probiotics can be given. To date, Stronger data in favor of their clinical use are provided in the prevention of gastrointestinal disorders, antibiotic-associated diarrhea, allergy and respiratory infections. We hereby discuss the role of probiotics in the reduction of the respiratory infection symptoms and we focus on the possibility to use them as an adjuvant to the therapeutic approach of the pandemic COVID-19. Nevertheless, it is accepted by the scientific community that more clinical studies should be undertaken in large samples of diseased populations so that the assessment of their therapeutic potential provide us with strong evidence for their efficacy and safety in clinical use.
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Affiliation(s)
- Elisavet Stavropoulou
- CHUV (Centre Hospitalier Universitaire Vaudois), Lausanne, Switzerland.,Department of Infectious Diseases, Central Institute, Valais Hospital, Sion, Switzerland
| | - Eugenia Bezirtzoglou
- Laboratory of Hygiene and Environmental Protection, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
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26
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Mussari CP, Dodd DS, Sreekantha RK, Pasunoori L, Wan H, Posy SL, Critton D, Ruepp S, Subramanian M, Watson A, Davies P, Schieven GL, Salter-Cid LM, Srivastava R, Tagore DM, Dudhgaonkar S, Poss MA, Carter PH, Dyckman AJ. Discovery of Potent and Orally Bioavailable Small Molecule Antagonists of Toll-like Receptors 7/8/9 (TLR7/8/9). ACS Med Chem Lett 2020; 11:1751-1758. [PMID: 32944143 DOI: 10.1021/acsmedchemlett.0c00264] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 07/29/2020] [Indexed: 12/12/2022] Open
Abstract
The toll-like receptor (TLR) family is an evolutionarily conserved component of the innate immune system, responsible for the early detection of foreign or endogenous threat signals. In the context of autoimmunity, the unintended recognition of self-motifs as foreign promotes initiation or propagation of disease. Overactivation of TLR7 and TLR9 have been implicated as factors contributing to autoimmune disorders such as psoriasis, arthritis, and lupus. In our search for small molecule antagonists of TLR7/9, 7f was identified as possessing excellent on-target potency for human TLR7/9 as well as for TLR8, with selectivity against other representative TLR family members. Good pharmacokinetic properties and a relatively balanced potency against TLR7 and TLR9 in mouse systems (systems which lack functional TLR8) made this an excellent in vivo tool compound, and efficacy from oral dosing in preclinical models of autoimmune disease was demonstrated.
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Affiliation(s)
- Christopher P. Mussari
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Dharmpal S. Dodd
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | | | - Laxman Pasunoori
- The Biocon Bristol Myers Squibb Research Center (BBRC), Bangalore 560099, India
| | - Honghe Wan
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Shana L. Posy
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - David Critton
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Stefan Ruepp
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Murali Subramanian
- The Biocon Bristol Myers Squibb Research Center (BBRC), Bangalore 560099, India
| | - Andrew Watson
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Paul Davies
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Gary L. Schieven
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Luisa M. Salter-Cid
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Ratika Srivastava
- The Biocon Bristol Myers Squibb Research Center (BBRC), Bangalore 560099, India
| | | | | | - Michael A. Poss
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Percy H. Carter
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
| | - Alaric J. Dyckman
- Bristol Myers Squibb Research and Development, P.O. Box 4000, Princeton, New Jersey 08543, United States
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27
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Gu T, Li G, Tian Y, Chen L, Wu X, Zeng T, Xu Q, Vladyslav S, Chen G, Lu L. Structural features and antiviral function of the MDA5 gene in ducks ( Anas platyrhynchos). CANADIAN JOURNAL OF ANIMAL SCIENCE 2020. [DOI: 10.1139/cjas-2019-0161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Melanoma differentiation-associated gene 5 (MDA5) is an important cytoplasmic RNA sensor that detects viral double-stranded RNA in innate immunity. The objective of this study was to characterize the structure and function of the MDA5 gene in the duck. In this study, full-length duck MDA5 (duMDA5) complementary DNA (cDNA) was obtained using the reverse transcription-polymerase chain reaction and rapid amplification of the cDNA ends. The cDNA consisted of a 123 nucleotide 5′ untranslated region (UTR), a 735 nucleotide 3′ UTR, and a 3012 nucleotide open-reading frame, encoding 1003 amino acids. Multiple sequence alignments showed that duMDA5 had 91.18% and 83.11% amino acid sequence similarity with geese and chicken MDA5, respectively, as well as 59.76%–61.26% sequence identity with mammalian homologs. Phylogenetic analysis demonstrated that MDA5 has been highly conserved throughout vertebrate evolution. Quantitative real-time polymerase chain reaction analysis indicated that the duMDA5 mRNA is scarcely detected in healthy tissues and the highest relative transcript level of duMDA5 was induced during poly(I:C) stimulation. Furthermore, knockdown duMDA5 significantly inhibited the transcription of poly(I:C)-induced beta interferons, nuclear factor kappa-B, interferon regulatory factor 7, translocated intimin receptor domain-containing adaptor protein inducing beta interferons, interferon-induced GTP-binding protein, signal transducer and activator of transcription 1 and 2 mRNA. Taken together, these results suggest that duMDA5 is an important receptor for inducing antiviral activity in the duck’s innate immune response.
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Affiliation(s)
- Tiantian Gu
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People’s Republic of China
- Jiangsu Key Laboratory for Animal Genetics, Breeding and Molecular Design, Yangzhou University, Yangzhou 225009, People’s Republic of China
| | - Guoqin Li
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People’s Republic of China
- Key Laboratory of Information Traceability for Agricultural Products, Ministry of Agriculture of China, Hangzhou 310021, People’s Republic of China
| | - Yong Tian
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People’s Republic of China
- Key Laboratory of Information Traceability for Agricultural Products, Ministry of Agriculture of China, Hangzhou 310021, People’s Republic of China
| | - Li Chen
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People’s Republic of China
- Key Laboratory of Information Traceability for Agricultural Products, Ministry of Agriculture of China, Hangzhou 310021, People’s Republic of China
| | - Xinsheng Wu
- Jiangsu Key Laboratory for Animal Genetics, Breeding and Molecular Design, Yangzhou University, Yangzhou 225009, People’s Republic of China
| | - Tao Zeng
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People’s Republic of China
| | - Qi Xu
- Jiangsu Key Laboratory for Animal Genetics, Breeding and Molecular Design, Yangzhou University, Yangzhou 225009, People’s Republic of China
| | - Spyrydonov Vladyslav
- National University of Life and Environmental Sciences of Ukraine, Kyiv 03041, Ukraine
| | - Guohong Chen
- Jiangsu Key Laboratory for Animal Genetics, Breeding and Molecular Design, Yangzhou University, Yangzhou 225009, People’s Republic of China
| | - Lizhi Lu
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, People’s Republic of China
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28
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Lü L, Yakoumatos L, Ren J, Duan X, Zhou H, Gu Z, Mohammed M, Uriarte SM, Liang S, Scott DA, Lamont RJ, Wang H. JAK3 restrains inflammatory responses and protects against periodontal disease through Wnt3a signaling. FASEB J 2020; 34:9120-9140. [PMID: 32433819 DOI: 10.1096/fj.201902697rr] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 04/07/2020] [Accepted: 04/21/2020] [Indexed: 12/14/2022]
Abstract
Homeostasis between pro- and anti- inflammatory responses induced by bacteria is critical for the maintenance of health. In the oral cavity, pro-inflammatory mechanisms induced by pathogenic bacteria are well-established; however, the anti-inflammatory responses that act to restrain innate responses remain poorly characterized. Here, we demonstrate that infection with the periodontal pathogen Porphyromonas gingivalis enhances the activity of Janus kinase 3 (JAK3) in innate immune cells, and subsequently phospho-inactivates Nedd4-2, an ubiquitin E3 ligase. In turn, Wingless-INT (Wnt) 3 (Wnt3) ubiquitination is decreased, while total protein levels are enhanced, leading to a reduction in pro-inflammatory cytokine levels. In contrast, JAK3 or Wnt3a inhibition robustly enhances nuclear factor kappa-light-chain-enhancer of activated B cells activity and the production of pro-inflammatory cytokines in P. gingivalis-stimulated innate immune cells. Moreover, using gain- and loss-of-function approaches, we demonstrate that downstream molecules of Wnt3a signaling, including Dvl3 and β-catenin, are responsible for the negative regulatory role of Wnt3a. In addition, using an in vivo P. gingivalis-mediated periodontal disease model, we show that JAK3 inhibition enhances infiltration of inflammatory cells, reduces expression of Wnt3a and Dvl3 in P. gingivalis-infected gingival tissues, and increases disease severity. Together, our results reveal a new anti-inflammatory role for JAK3 in innate immune cells and show that the underlying signaling pathway involves Nedd4-2-mediated Wnt3a ubiquitination.
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Affiliation(s)
- Lanhai Lü
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA.,Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Lan Yakoumatos
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - Junling Ren
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA.,Department of Oral and Craniofacial Molecular Biology, VCU School of Dentistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Xiaoxian Duan
- Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Huaxin Zhou
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Zhen Gu
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - Muddasir Mohammed
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - Silvia M Uriarte
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA.,Department of Medicine, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Shuang Liang
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - David A Scott
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - Richard J Lamont
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - Huizhi Wang
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA.,Department of Oral and Craniofacial Molecular Biology, VCU School of Dentistry, Virginia Commonwealth University, Richmond, VA, USA
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29
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Li G, Fan Y, Lai Y, Han T, Li Z, Zhou P, Pan P, Wang W, Hu D, Liu X, Zhang Q, Wu J. Coronavirus infections and immune responses. J Med Virol 2020; 92:424-432. [PMID: 31981224 PMCID: PMC7166547 DOI: 10.1002/jmv.25685] [Citation(s) in RCA: 1107] [Impact Index Per Article: 276.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 12/13/2022]
Abstract
Coronaviruses (CoVs) are by far the largest group of known positive-sense RNA viruses having an extensive range of natural hosts. In the past few decades, newly evolved Coronaviruses have posed a global threat to public health. The immune response is essential to control and eliminate CoV infections, however, maladjusted immune responses may result in immunopathology and impaired pulmonary gas exchange. Gaining a deeper understanding of the interaction between Coronaviruses and the innate immune systems of the hosts may shed light on the development and persistence of inflammation in the lungs and hopefully can reduce the risk of lung inflammation caused by CoVs. In this review, we provide an update on CoV infections and relevant diseases, particularly the host defense against CoV-induced inflammation of lung tissue, as well as the role of the innate immune system in the pathogenesis and clinical treatment.
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Affiliation(s)
- Geng Li
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China.,Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yaohua Fan
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yanni Lai
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tiantian Han
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zonghui Li
- Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Peiwen Zhou
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Pan Pan
- Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wenbiao Wang
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Dingwen Hu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Xiaohong Liu
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qiwei Zhang
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China.,School of Pubic Health, Southern Medical University, Guangzhou, China
| | - Jianguo Wu
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China.,State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
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30
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Stewart BJ, Ferdinand JR, Clatworthy MR. Using single-cell technologies to map the human immune system - implications for nephrology. Nat Rev Nephrol 2020; 16:112-128. [PMID: 31831877 DOI: 10.1038/s41581-019-0227-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2019] [Indexed: 02/02/2023]
Abstract
Advances in single-cell technologies are transforming our understanding of cellular identity. For instance, the application of single-cell RNA sequencing and mass cytometry technologies to the study of immune cell populations in blood, secondary lymphoid organs and the renal tract is helping researchers to map the complex immune landscape within the kidney, define cell ontogeny and understand the relationship of kidney-resident immune cells with their circulating counterparts. These studies also provide insights into the interactions of immune cell populations with neighbouring epithelial and endothelial cells in health, and across a range of kidney diseases and cancer. These data have translational potential and will aid the identification of drug targets and enable better prediction of off-target effects. The application of single-cell technologies to clinical renal biopsy samples, or even cells within urine, will improve diagnostic accuracy and assist with personalized prognostication for patients with various kidney diseases. A comparison of immune cell types in peripheral blood and secondary lymphoid organs in healthy individuals and in patients with systemic autoimmune diseases that affect the kidney will also help to unravel the mechanisms that underpin the breakdown in self-tolerance and propagation of autoimmune responses. Together, these immune cell atlases have the potential to transform nephrology.
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Affiliation(s)
- Benjamin J Stewart
- Molecular Immunity Unit, University of Cambridge Department of Medicine, Cambridge, UK
- Cellular Genetics, Wellcome Sanger Institute, Cambridge, UK
- Cambridge NIHR Biomedical Research Centre, Cambridge, UK
| | - John R Ferdinand
- Molecular Immunity Unit, University of Cambridge Department of Medicine, Cambridge, UK
- Cellular Genetics, Wellcome Sanger Institute, Cambridge, UK
- Cambridge NIHR Biomedical Research Centre, Cambridge, UK
| | - Menna R Clatworthy
- Molecular Immunity Unit, University of Cambridge Department of Medicine, Cambridge, UK.
- Cellular Genetics, Wellcome Sanger Institute, Cambridge, UK.
- Cambridge NIHR Biomedical Research Centre, Cambridge, UK.
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31
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Abstract
Sepsis, a life threating syndrome characterized by organ failure after infection, is the most common cause of death in hospitalized patients. The treatment of sepsis is generally supportive in nature, involving the administration of intravenous fluids, vasoactive substances and oxygen plus antibiotics to eliminate the pathogen. No drugs have been approved specifically for the treatment of sepsis, and clinical trials of potential therapies have failed to reduce mortality - suggesting that new approaches are needed. Abnormalities in the immune response elicited by the pathogen, ranging from excessive inflammation to immunosuppression, contribute to disease pathogenesis. Although hundreds of immunomodulatory agents are potentially available, it remains unclear which patient benefits from which immune therapy at a given time point. Results indicate the importance of personalized therapy, specifically the need to identify the type of intervention required by each individual patient at a given point in the disease process. To address this issue will require using biomarkers to stratify patients based on their individual immune status. This article reviews recent and ongoing clinical investigations using immunostimulatory or immunosuppressive therapies against sepsis including non-pharmacological and novel preclinical approaches.
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Yang W, Ru Y, Ren J, Bai J, Wei J, Fu S, Liu X, Li D, Zheng H. G3BP1 inhibits RNA virus replication by positively regulating RIG-I-mediated cellular antiviral response. Cell Death Dis 2019; 10:946. [PMID: 31827077 PMCID: PMC6906297 DOI: 10.1038/s41419-019-2178-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 12/18/2022]
Abstract
Retinoic acid-inducible gene I (RIG-I) is a pattern recognition receptor and is involved in the innate immune response against RNA viruses infection. Here, we demonstrate that the Ras-GTPase-activating protein SH3-domain-binding protein 1 (G3BP1) serves as a positive regulator of the RIG-I-mediated signaling pathway. G3BP1-deficient cells inhibited RNA virus-triggered induction of downstream antiviral genes. Furthermore, we found that G3BP1 inhibited the replication of Sendai virus and vesicular stomatitis virus, indicating a positive regulation of G3BP1 to cellular antiviral responses. Mechanistically, G3BP1 formed a complex with RNF125 and RIG-I, leading to decreased RNF125 via its auto-ubiquitination; thus, promoting expression of RIG-I. Overall, the results suggest a novel mechanism for G3BP1 in the positive regulation of antiviral signaling mediated by RIG-I.
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Affiliation(s)
- Wenping Yang
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Yi Ru
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Jingjing Ren
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Juncui Bai
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Junshu Wei
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Shaozu Fu
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Xiangtao Liu
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China
| | - Dan Li
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China.
| | - Haixue Zheng
- State Key Laboratory of Veterinary Etiological Biology and OIE/National Foot and Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, Gansu, China.
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Yang Q, Bai SY, Li LF, Li S, Zhang Y, Munir M, Qiu HJ. Human Hemoglobin Subunit Beta Functions as a Pleiotropic Regulator of RIG-I/MDA5-Mediated Antiviral Innate Immune Responses. J Virol 2019; 93:e00718-19. [PMID: 31167908 PMCID: PMC6675906 DOI: 10.1128/jvi.00718-19] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 05/20/2019] [Indexed: 12/28/2022] Open
Abstract
Hemoglobin is an important oxygen-carrying protein and plays crucial roles in establishing host resistance against pathogens and in regulating innate immune responses. The hemoglobin subunit beta (HB) is an essential component of hemoglobin, and we have previously demonstrated that the antiviral role of the porcine HB (pHB) is mediated by promoting type I interferon pathways. Thus, considering the high homology between human HB (hHB) and pHB, we hypothesized that hHB also plays an important role in the antiviral innate immunity. In this study, we characterized hHB as a regulatory factor for the replication of RNA viruses by differentially regulating the RIG-I- and MDA5-mediated antiviral signaling pathways. Furthermore, we showed that hHB directly inhibited MDA5-mediated signaling by reducing the MDA5-double-stranded RNA (dsRNA) interaction. Additionally, hHB required hHB-induced reactive oxygen species (ROS) to promote RIG-I-mediated signaling through enhancement of K63-linked RIG-I ubiquitination. Taken together, our findings suggest that hHB is a pleiotropic regulator of RIG-I/MDA5-mediated antiviral responses and further highlight the importance of the intercellular microenvironment, including the redox state, in regulating antiviral innate immune responses.IMPORTANCE Hemoglobin, the most important oxygen-carrying protein, is involved in the regulation of innate immune responses. We have previously reported that the porcine hemoglobin subunit beta (HB) exerts antiviral activity through regulation of type I interferon production. However, the antiviral activities and the underlying mechanisms of HBs originating from other animals have been poorly understood. Here, we identified human HB (hHB) as a pleiotropic regulator of the replication of RNA viruses through regulation of RIG-I/MDA5-mediated signaling pathways. hHB enhances RIG-I-mediated antiviral responses by promoting RIG-I ubiquitination depending on the hHB-induced reactive oxygen species (ROS), while it blocks MDA5-mediated antiviral signaling by suppressing the MDA5-dsRNA interaction. Our results contribute to an understanding of the crucial roles of hHB in the regulation of the RIG-I/MDA5-mediated signaling pathways. We also provide novel insight into the correlation of the intercellular redox state with the regulation of antiviral innate immunity.
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Affiliation(s)
- Qian Yang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Si-Yu Bai
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Lian-Feng Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Su Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yuexiu Zhang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Muhammad Munir
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, United Kingdom
| | - Hua-Ji Qiu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
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Pfannkuch L, Hurwitz R, Traulsen J, Sigulla J, Poeschke M, Matzner L, Kosma P, Schmid M, Meyer TF. ADP heptose, a novel pathogen-associated molecular pattern identified in Helicobacter pylori. FASEB J 2019; 33:9087-9099. [PMID: 31075211 PMCID: PMC6662969 DOI: 10.1096/fj.201802555r] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The gastric pathogen Helicobacter pylori activates the NF-κB pathway in human epithelial cells via the recently discovered α-kinase 1 TRAF-interacting protein with forkhead-associated domain (TIFA) axis. We and others showed that this pathway can be triggered by heptose 1,7-bisphosphate (HBP), an LPS intermediate produced in gram-negative bacteria that represents a new pathogen-associated molecular pattern (PAMP). Here, we report that our attempts to identify HBP in lysates of H. pylori revealed surprisingly low amounts, failing to explain NF-κB activation. Instead, we identified ADP-glycero-β-D-manno-heptose (ADP heptose), a derivative of HBP, as the predominant PAMP in lysates of H. pylori and other gram-negative bacteria. ADP heptose exhibits significantly higher activity than HBP, and cells specifically sensed the presence of the β-form, even when the compound was added extracellularly. The data lead us to conclude that ADP heptose not only constitutes the key PAMP responsible for H. pylori–induced NF-κB activation in epithelial cells, but it acts as a general gram-negative bacterial PAMP.—Pfannkuch, L., Hurwitz, R., Traulsen, J., Sigulla, J., Poeschke, M., Matzner, L., Kosma, P., Schmid, M., Meyer, T. F. ADP heptose, a novel pathogen-associated molecular pattern identified in Helicobacter pylori.
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Affiliation(s)
- Lennart Pfannkuch
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany.,Department of Infectious Diseases and Pulmonary Medicine, Charité, University Hospital Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Robert Hurwitz
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Jan Traulsen
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Janine Sigulla
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Marcella Poeschke
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Laura Matzner
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Paul Kosma
- Department of Chemistry, University of Natural Resources and Life Sciences-Vienna, Vienna, Austria
| | - Monika Schmid
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Thomas F Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
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Masum MA, Ichii O, ELewa YHA, Kon Y. Induced expression of Toll-like receptor 9 in peritubular capillary endothelium correlates with the progression of tubulointerstitial lesions in autoimmune disease-prone mice. Lupus 2019; 28:324-333. [PMID: 30813872 DOI: 10.1177/0961203319828518] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Toll-like receptor (Tlr) 9 is capable of recognizing exogenous and/or endogenous nucleic acids and plays a crucial role in innate and adaptive immunity. Recently, we showed that Tlr9 is overexpressed in podocytes, a component of the blood-urine barrier (BUB), in glomeruli of autoimmune glomerulonephritis (AGN) model mice. This study investigated the activation of peritubular capillary (PTC) endothelial cells (ECs), a component of the BUB in the tubulointerstitium, through overexpressing Tlr9, and the subsequent development of tubulointerstitial lesions (TILs) in AGN model mice. METHODS Lupus-prone BXSB/MpJ-Yaa (Yaa) and BXSB/MpJ (BXSB) mice were used as an AGN model and control, respectively. In addition to histopathological and ultrastructural techniques, protein and mRNA levels were also evaluated. The relationship between Tlr9 and TIL indices was analyzed by statistical correlation analysis. RESULTS Yaa mice developed TILs and showed strong Tlr9 mRNA expression in PTC ECs at 24 weeks (wks) of age. However, BXSB mice showed no TIL but faint expression of Tlr9 mRNA at 8 and 24 wks of age. Tlr9 protein localization on PTC was almost absent in BXSB mice at both ages but intense expression was found in Yaa mice only at 24 wks of age. Relative mRNA expression of Tlr9 and its putative downstream cytokines, including interleukin 1 beta ( Il1b), Il6, interferon gamma ( Ifng), and tumor necrosis factor alpha ( Tnf) was markedly increased in isolated tubulointerstitium from Yaa mice at 24 wks of age. Furthermore, electron microscopy examination revealed PTC injury and TIL in Yaa mice at 24 wks. The expression level of Tlr9 in the tubulointerstitium was correlated with inflammatory cells in TILs, injured PTC, Ilb and Tnf expression, and damaged tubules ( P < 0.05 and 0.01). CONCLUSION Induced expression of Tlr9 in ECs correlates with PTC injury and the development of TILs in lupus-prone AGN model mice.
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Affiliation(s)
- M A Masum
- 1 Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,2 Department of Anatomy, Histology and Physiology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - O Ichii
- 1 Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Y H A ELewa
- 1 Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,3 Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Y Kon
- 1 Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
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Masum MA, Ichii O, Hosny Ali Elewa Y, Nakamura T, Otani Y, Hosotani M, Kon Y. Overexpression of toll-like receptor 9 correlates with podocyte injury in a murine model of autoimmune membranoproliferative glomerulonephritis. Autoimmunity 2018; 51:386-398. [PMID: 30592438 DOI: 10.1080/08916934.2018.1549234] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Toll-like receptors (Tlrs) are sensors of danger signals which promote the activation of immune cells and intrinsic renal cells. Podocytes, the intrinsic cells of glomerulus, are continuously exposed to various plasma solutes and danger signals due to their unique location in the glomerulus. Herein, we show that Tlr9 is overexpressed in podocytes and the mechanisms which cause its injury and development of membranoproliferative glomerulonephritis (MPGN) in model BXSB/MpJ-Yaa (Yaa) mice. Yaa mice developed typical lesions of MPGN and showed strong expression of Tlr9 mRNA throughout the glomerulus particularly toward the periphery of the glomerulus. However, BXSB/MpJ (BXSB) mice showed no lesion for MPGN but a very weak expression of Tlr9 mRNA. Relative mRNA expression of Tlr9 and its downstream cytokines, including interleukin 1 beta (Il1b), Il6, interferon gamma (Ifng) and tumour necrosis factor alpha (Tnfa) was markedly increased in glomeruli isolated from Yaa mice. Tlr9 protein expression was almost absent in BXSB mice but intense expression was found in Yaa mice. Podocyte protein expression was normal in BXSB mice but decreased in Yaa mice and colocalized with Tlr9 protein. Furthermore, electron microscopy examination revealed podocyte injury and electron-dense materials in thickened glomerular basement membrane of Yaa mice. Glomerular Tlr9 mRNA expression was significantly correlated with anti-dsDNA antibody, proteinuria, renal function indices (sBUN and sCr), glomerular histopathology indices, downstream factors of Tlr family (Ilb and Tnfa), podocyte injury parameters (p < .05 and p < .01). In conclusion, overexpression of TLR9 correlates with podocyte injury and development of MPGN.
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Affiliation(s)
- Md Abdul Masum
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan.,b Faculty of Animal Science and Veterinary Medicine, Department of Anatomy, Histology and Physiology , Sher-e-Bangla Agricultural University , Dhaka , Bangladesh
| | - Osamu Ichii
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan
| | - Yaser Hosny Ali Elewa
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan.,c Department of Histology, Faculty of Veterinary Medicine , Zagazig University , Zagazig , Egypt
| | - Teppei Nakamura
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan.,d Section of Biological Safety Research, Chitose Laboratory , Japan Food Research Laboratories , Chitose , Japan
| | - Yuki Otani
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan
| | - Marina Hosotani
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan
| | - Yasuhiro Kon
- a Laboratory of Anatomy, Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences , Hokkaido University , Sapporo , Japan
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Elshikha AS, Yuan Y, Lu Y, Chen MJ, Abboud G, Akbar MA, Plate H, Wolney H, Hoffmann T, Tagari E, Zeumer L, Morel L, Song S. Alpha 1 Antitrypsin Gene Therapy Extends the Lifespan of Lupus-Prone Mice. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2018; 11:131-142. [PMID: 30547047 PMCID: PMC6258868 DOI: 10.1016/j.omtm.2018.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 10/13/2018] [Indexed: 12/22/2022]
Abstract
Systemic lupus erythematosus (SLE) is a heterogeneous autoimmune disease characterized by high levels of pathogenic autoantibodies and tissue damage. Multiple studies showed that dendritic cell (DC) activation plays a critical role in SLE pathogenesis. Human alpha 1 antitrypsin (hAAT) is a serine proteinase inhibitor with potent anti-inflammatory and cytoprotective properties. In this study, we first examined the effects of hAAT on the functions of DCs from lupus-prone mice, and we showed that hAAT treatment efficiently inhibited CpG- (TLR9 agonist) induced activation of bone marrow-derived conventional and plasmacytoid DCs as well as the production of pro-inflammatory cytokines. The hAAT treatment also attenuated DC help for B cell proliferation and immunoglobulin M (IgM) production. We next tested the protective effect of hAAT protein and gene therapy using recombinant adeno-associated virus 8 (rAAV8-CB-hAAT) in a spontaneous lupus mouse model, and we showed that both treatments decreased autoantibody levels. Importantly, rAAV8-CB-hAAT did not induce an immune response to its transgene product (hAAT), but it showed more pronounced therapeutic effects in reducing urine protein levels and extending the lifespan of these mice. These results indicate that AAT has therapeutic potential in the treatment of SLE in humans.
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Affiliation(s)
- Ahmed Samir Elshikha
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA.,Department of Pharmaceutics, Zagazig University, Zagazig, Sharkia, Egypt
| | - Ye Yuan
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Yuanqing Lu
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Mong-Jen Chen
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Georges Abboud
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL 32610, USA
| | - Mohammad Ahsanul Akbar
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Henrike Plate
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Hedwig Wolney
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Tanja Hoffmann
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Eleni Tagari
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Leilani Zeumer
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL 32610, USA
| | - Laurence Morel
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL 32610, USA
| | - Sihong Song
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
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Dong X, Zheng Z, Zhai Y, Zheng Y, Ding J, Jiang J, Zhu P. ACPA mediates the interplay between innate and adaptive immunity in rheumatoid arthritis. Autoimmun Rev 2018; 17:845-853. [DOI: 10.1016/j.autrev.2018.02.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 02/20/2018] [Indexed: 01/17/2023]
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39
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Novel insights into the role of inflammasomes in autoimmune and metabolic rheumatic diseases. Rheumatol Int 2018; 38:1345-1354. [DOI: 10.1007/s00296-018-4074-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 05/29/2018] [Indexed: 12/12/2022]
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40
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Ricci-Azevedo R, Roque-Barreira MC, Gay NJ. Targeting and Recognition of Toll-Like Receptors by Plant and Pathogen Lectins. Front Immunol 2017; 8:1820. [PMID: 29326706 PMCID: PMC5741612 DOI: 10.3389/fimmu.2017.01820] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 12/04/2017] [Indexed: 02/02/2023] Open
Abstract
We have reported that some lectins act as agonists of toll-like receptors (TLRs) and have immunomodulatory properties. The plant lectin ArtinM, for example, interacts with N-glycans of TLR2, whereas other lectins of microbial origin interact with TLR2 and TLR4. Expression of the receptors on the surface of antigen-presenting cells exposes N-glycans that may be targeted by lectins of different structures, specificities, and origins. In vitro, these interactions trigger cell signaling that leads to NF-κB activation and production of the Th1 polarizing cytokine IL-12. In vivo, a same sequence of events follows the administration of an active lectin to mice infected with an intracellular pathogen, conferring resistance to the pathogen. The lectins of the human pathogens Toxoplasma gondii (TgMIC1 and TgMIC4) and Paracoccidioides brasiliensis (Paracoccin), by recognition and activation of TLR2 and TLR4, induce cell events and in vivo effects comparable to the promoted by the plant lectin ArtinM. In this article, we highlight these two distinct mechanisms for activating antigen-presenting cells. On the one hand, TLRs act as sensors for the presence of conventional pathogen-associated molecular patterns, such as microbial lipids. On the other hand, we showed that TLR-mediated cell activation might be triggered by an alternative way, in which lectins bind to TLRs N-glycans and stimulate cells to increase the expression of pro-inflammatory cytokines. This process may lead to the development of new pharmaceutical tools that promote protective immune responses directed against intracellular pathogens and tumors.
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Affiliation(s)
- Rafael Ricci-Azevedo
- Laboratory of Immunochemistry and Glycobiology, Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Maria-Cristina Roque-Barreira
- Laboratory of Immunochemistry and Glycobiology, Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Nicholas J. Gay
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
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Pollard KM, Escalante GM, Huang H, Haraldsson KM, Hultman P, Christy JM, Pawar RD, Mayeux JM, Gonzalez-Quintial R, Baccala R, Beutler B, Theofilopoulos AN, Kono DH. Induction of Systemic Autoimmunity by a Xenobiotic Requires Endosomal TLR Trafficking and Signaling from the Late Endosome and Endolysosome but Not Type I IFN. THE JOURNAL OF IMMUNOLOGY 2017; 199:3739-3747. [PMID: 29055005 DOI: 10.4049/jimmunol.1700332] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 09/25/2017] [Indexed: 12/17/2022]
Abstract
Type I IFN and nucleic acid-sensing TLRs are both strongly implicated in the pathogenesis of lupus, with most patients expressing IFN-induced genes in peripheral blood cells and with TLRs promoting type I IFNs and autoreactive B cells. About a third of systemic lupus erythematosus patients, however, lack the IFN signature, suggesting the possibility of type I IFN-independent mechanisms. In this study, we examined the role of type I IFN and TLR trafficking and signaling in xenobiotic systemic mercury-induced autoimmunity (HgIA). Strikingly, autoantibody production in HgIA was not dependent on the type I IFN receptor even in NZB mice that require type I IFN signaling for spontaneous disease, but was dependent on the endosomal TLR transporter UNC93B1 and the endosomal proton transporter, solute carrier family 15, member 4. HgIA also required the adaptor protein-3 complex, which transports TLRs from the early endosome to the late endolysosomal compartments. Examination of TLR signaling pathways implicated the canonical NF-κB pathway and the proinflammatory cytokine IL-6 in autoantibody production, but not IFN regulatory factor 7. These findings identify HgIA as a novel type I IFN-independent model of systemic autoimmunity and implicate TLR-mediated NF-κB proinflammatory signaling from the late endocytic pathway compartments in autoantibody generation.
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Affiliation(s)
- K Michael Pollard
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037;
| | - Gabriela M Escalante
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Hua Huang
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037
| | - Katarina M Haraldsson
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037
| | - Per Hultman
- Department of Experimental and Clinical Medicine, Linköping University, Linköping 58183, Sweden; and
| | - Joseph M Christy
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Rahul D Pawar
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Jessica M Mayeux
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | | | - Roberto Baccala
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037
| | - Bruce Beutler
- Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | | | - Dwight H Kono
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037
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Takagi M, Takakubo Y, Pajarinen J, Naganuma Y, Oki H, Maruyama M, Goodman SB. Danger of frustrated sensors: Role of Toll-like receptors and NOD-like receptors in aseptic and septic inflammations around total hip replacements. J Orthop Translat 2017; 10:68-85. [PMID: 29130033 PMCID: PMC5676564 DOI: 10.1016/j.jot.2017.05.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The innate immune sensors, Toll-like receptors (TLRs) and nucleotide-binding oligomerization domain (NOD)-like receptors (NLRs), can recognize not only exogenous pathogen-associated molecular patterns (PAMPs), but also endogenous molecules created upon tissue injury, sterile inflammation, and degeneration. Endogenous ligands are called damage-associated molecular patterns (DAMPs), and include endogenous molecules released from activated and necrotic cells as well as damaged extracellular matrix. TLRs and NLRs can interact with various ligands derived from PAMPs and DAMPs, leading to activation and/or modulation of intracellular signalling pathways. Intensive research on the innate immune sensors, TLRs and NLRs, has brought new insights into the pathogenesis of not only various infectious and rheumatic diseases, but also aseptic foreign body granuloma and septic inflammation of failed total hip replacements (THRs). In this review, recent knowledge is summarized on the innate immune system, including TLRs and NLRs and their danger signals, with special reference to their possible role in the adverse local host response to THRs. Translational potential of this article: A clear understanding of the roles of Toll-like receptors and NOD-like receptors in aseptic and septic loosening of joint replacements will facilitate potential strategies to mitigate these events, thereby extending the longevity of implants in humans.
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Affiliation(s)
- Michiaki Takagi
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata City, Yamagata, Japan
| | - Yuya Takakubo
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata City, Yamagata, Japan
| | - Jukka Pajarinen
- Department of Orthopaedic Surgery, Stanford University, Stanford, CA, USA
| | - Yasushi Naganuma
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata City, Yamagata, Japan
| | - Hiroharu Oki
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata City, Yamagata, Japan
| | - Masahiro Maruyama
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata City, Yamagata, Japan.,Department of Orthopaedic Surgery, Stanford University, Stanford, CA, USA
| | - Stuart B Goodman
- Department of Orthopaedic Surgery, Stanford University, Stanford, CA, USA
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Suyavaran A, Thirunavukkarasu C. Preconditioning methods in the management of hepatic ischemia reperfusion- induced injury: Update on molecular and future perspectives. Hepatol Res 2017; 47:31-48. [PMID: 26990696 DOI: 10.1111/hepr.12706] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/12/2016] [Accepted: 03/11/2016] [Indexed: 12/14/2022]
Abstract
Hepatic IR (ischemia reperfusion) injury is a commonly encountered obstacle in the post-operative management of hepatic surgery. Hepatic IR occurs during 'Pringle maneuver' for reduction of blood loss or during a brief period of cold storage followed by reperfusion of liver grafts. The stress induced during hepatic IR, triggers a spectrum of cellular responses leading to the varying degrees of hepatic complications which in turn affect the post operative care. Different preconditioning methods either activate or subdue different sets of molecular signals, resulting in varied levels of protection against hepatic IR injury. Yet, there is a serious lacuna in the knowledge regarding the choice of preconditioning methods and the resulting molecular changes in order to assess the efficiency and choice of these methods correctly. This review provides an update on the various preconditioning approaches such as surgical/ischemic, antioxidant, pharmaceutical and genetic preconditioning strategies published during last six years (2009-2015). Further, we discuss the attenuation or inhibition of specific inflammatory, apoptotic and necrotic markers in the various experimental models of liver IR subjected to different preconditioning strategies. While enlisting the controversies in the ischemic preconditioning strategy, we bring out the uncertainties in the existing molecular targets and their reliability in the attenuation of hepatic IR injury. Future research studies would include the novel preconditioning strategies employ i) the targeted gene silencing of key molecular targets inducing IR, ii) hyper expression of beneficial molecular signals against IR via gene transfer techniques. The above studies would see the combination of these latest techniques with the established preconditioning strategies for better post-operative hepatic management.
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Affiliation(s)
- Arumugam Suyavaran
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India
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Loss of RIG-I leads to a functional replacement with MDA5 in the Chinese tree shrew. Proc Natl Acad Sci U S A 2016; 113:10950-5. [PMID: 27621475 DOI: 10.1073/pnas.1604939113] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The function of the RIG-I-like receptors (RLRs; including RIG-I, MDA5, and LGP2) as key cytoplasmic sensors of viral pathogen-associated molecular patterns (PAMPs) has been subjected to numerous pathogenic challenges and has undergone a dynamic evolution. We found evolutionary evidence that RIG-I was lost in the Chinese tree shrew lineage. Along with the loss of RIG-I, both MDA5 (tMDA5) and LGP2 (tLGP2) have undergone strong positive selection in the tree shrew. tMDA5 or tMDA5/tLGP2 could sense Sendai virus (an RNA virus posed as a RIG-I agonist) for inducing type I IFN, although conventional RIG-I and MDA5 were thought to recognize distinct RNA structures and viruses. tMDA5 interacted with adaptor tMITA (STINGTMEM173/ERIS), which was reported to bind only with RIG-I. The positively selected sites in tMDA5 endowed the substitute function for the lost RIG-I. These findings provided insights into the adaptation and functional diversity of innate antiviral activity in vertebrates.
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Eleftheriadis T, Pissas G, Liakopoulos V, Stefanidis I. Cytochrome c as a Potentially Clinical Useful Marker of Mitochondrial and Cellular Damage. Front Immunol 2016; 7:279. [PMID: 27489552 PMCID: PMC4951490 DOI: 10.3389/fimmu.2016.00279] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 07/11/2016] [Indexed: 11/24/2022] Open
Abstract
Mitochondria are evolutionary endosymbionts derived from bacteria. Thus, they bear molecules, such as mitochondrial DNA (mtDNA) that contains CpG DNA repeats and N-formyl peptides (FPs), found in bacteria. Upon cell necrosis or apoptosis, these molecules are released into the interstitial space and the circulation and recognized by the immune cells through the same receptors that recognize pathogen-associated molecular patterns, leading to inflammation. Other mitochondrial molecules are not of bacterial origin, but they may serve as danger-associated molecular patterns (DAMPs) when due to cell injury are translocated into inappropriate compartments. There they are recognized by pattern recognition receptors of the immune cells. Cytochrome c is such a molecule. In this review, experimental and clinical data are presented that confirms cytochrome c release into the extracellular space in pathological conditions characterized by cell death. This indicates that serum cytochrome c, which can be easily measured, may be a clinically useful marker for diagnosing and assessing the severity of such pathological entities. Reasonably, detection of high cytochrome c level into the circulation means release of various other molecules that serves as DAMPs when found extracellularly, the mtDNA and FPs included. Finally, because the release of this universally found compound into the extracellular space makes cytochrome c an ideal molecule to play the role of a DAMP per se, the available experimental and clinical data that support such a role are provided.
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Affiliation(s)
| | - Georgios Pissas
- Department of Nephrology, Medical School, University of Thessaly , Larissa , Greece
| | | | - Ioannis Stefanidis
- Department of Nephrology, Medical School, University of Thessaly , Larissa , Greece
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Lerman I, Hauger R, Sorkin L, Proudfoot J, Davis B, Huang A, Lam K, Simon B, Baker DG. Noninvasive Transcutaneous Vagus Nerve Stimulation Decreases Whole Blood Culture-Derived Cytokines and Chemokines: A Randomized, Blinded, Healthy Control Pilot Trial. Neuromodulation 2016; 19:283-90. [PMID: 26990318 DOI: 10.1111/ner.12398] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/20/2015] [Accepted: 12/17/2015] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The purpose of this study was to test the transcutaneous noninvasive vagus nerve stimulator (nVNS) (gammaCore©) device to determine if it modulates the peripheral immune system, as has been previously published for implanted vagus nerve stimulators. MATERIALS AND METHODS A total of 20 healthy males and females were randomized to receive either nVNS or sham stimulation (SST). All subjects underwent an initial blood draw at 8:00 am, followed by stimulation with nVNS or SST at 8:30 am. Stimulation was repeated at 12:00 pm and 6:00 pm. Additional blood samples were withdrawn 90 min and 24 hour after the first stimulation session. After samples were cultured using the Myriad RBM TruCulture (Austin, TX) system (WBCx), levels of cytokines and chemokines were measured by the Luminex assay and statistical analyses within and between groups were performed using the Wilcoxon Signed Ranks Test and Mann-Whitney U with the statistical program R. RESULTS A significant percent decrease in the levels of the cytokine interleukin [IL]-1β, tumor necrosis factor [TNF] levels, and chemokine, interleukin [IL]-8 IL-8, macrophage inflammatory protein [MIP]-1α, and monocyte chemoattractant protein [MCP]-1 levels was observed in the nVNS group non-lipopolysaccharide (LPS)-stimulated whole blood culture (n-WBCx) at the 24-hour time point (p < 0.05). In SST group, there was a significant percent increase in IL-8 at 90 min post-stimulation (p < 0.05). At 90 min, the nVNS group had a greater percent decrease in IL-8 concentration (p < 0.05) compared to SST group. The nVNS group had a greater percent decrease in cytokines (TNF, IL-1β) and chemokines (MCP-1 and IL-8) at 24 hour (p < 0.05) in comparison to SST. LPS-stimulated whole blood cultures (L-WBCx) did not show a significant decrease in cytokine levels in either the nVNS or SST group across any time points. The nVNS group showed a significant percent increase in LPS-stimulated IL-10 levels at the 24-hour time point in comparison to SST. CONCLUSIONS nVNS downregulates inflammatory cytokine release suggesting that nVNS may be an effective anti-inflammatory treatment.
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Affiliation(s)
- Imanuel Lerman
- Department of Psychiatry, Center of Excellence for Stress and Mental Health, San Diego, CA, USA.,Department of Psychiatry, VA San Diego Healthcare System, San Diego, CA, USA.,Department of Anesthesiology, University of California, San Diego, San Diego, CA, USA.,Department of Psychiatry, University of California, San Diego, San Diego, CA, USA
| | - Richard Hauger
- Department of Psychiatry, Center of Excellence for Stress and Mental Health, San Diego, CA, USA.,Department of Psychiatry, VA San Diego Healthcare System, San Diego, CA, USA.,Department of Psychiatry, University of California, San Diego, San Diego, CA, USA
| | - Linda Sorkin
- Department of Anesthesiology, University of California, San Diego, San Diego, CA, USA
| | - James Proudfoot
- Department of Anesthesiology, Clinical and Translational Research Institute, University of California, San Diego, San Diego, CA, USA
| | - Bryan Davis
- Department of Anesthesiology, University of California, San Diego, San Diego, CA, USA
| | - Andy Huang
- Department of Anesthesiology, University of California, San Diego, San Diego, CA, USA
| | - Katie Lam
- Department of Anesthesiology, University of California, San Diego, San Diego, CA, USA
| | - Bruce Simon
- Electrocore Research Unit, Basking Ridge, NJ, USA
| | - Dewleen G Baker
- Department of Psychiatry, Center of Excellence for Stress and Mental Health, San Diego, CA, USA.,Department of Psychiatry, VA San Diego Healthcare System, San Diego, CA, USA.,Department of Psychiatry, University of California, San Diego, San Diego, CA, USA
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Sun R, Zhang Y, Ma S, Qi H, Wang M, Duan J, Ma S, Zhu X, Li G, Wang H. Down-regulation of mitogen-activated protein kinases and nuclear factor-κB signaling is involved in rapamycin suppression of TLR2-induced inflammatory response in monocytic THP-1 cells. Microbiol Immunol 2015; 59:614-22. [DOI: 10.1111/1348-0421.12321] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/20/2015] [Accepted: 08/25/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Ruili Sun
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
- Cancer Research Institute, Central South University, Key Laboratory of Carcinogenesis, National Health and Family Planning Commission; Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education; Changsha 410078
| | - Yi Zhang
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
| | - Shijiang Ma
- Third Affiliated Hospital; Xinxiang Medical University; Xinxiang 453003 China
| | - Hengtian Qi
- Third Affiliated Hospital; Xinxiang Medical University; Xinxiang 453003 China
| | - Mingyong Wang
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
| | - Juhong Duan
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
| | - Shujun Ma
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
| | - Xiaofei Zhu
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
| | - Guancheng Li
- Cancer Research Institute, Central South University, Key Laboratory of Carcinogenesis, National Health and Family Planning Commission; Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education; Changsha 410078
| | - Hui Wang
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine in Henan Province; School of Laboratory Medicine, Xinxiang Medical University; Xinxiang 453003
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Raja J, Denton CP. Cytokines in the immunopathology of systemic sclerosis. Semin Immunopathol 2015; 37:543-57. [PMID: 26152640 DOI: 10.1007/s00281-015-0511-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 06/16/2015] [Indexed: 02/06/2023]
Abstract
Cytokines and growth factors are key regulators of immune activation, vascular alteration and excessive production of extracellular matrix which are hallmark events in the pathogenesis of systemic sclerosis (SSc). They modulate cell-cell and cell-matrix interactions. In particular, cytokines play a central role in the immunopathogenesis of SSc on the basis of molecular pathways which are complex and not completely understood. The majority of cytokines that may be involved in SSc pathogenesis have effect upon or are derived from cells of the immune system, including both the innate and adaptive compartments. Novel therapies that block key mediators that drive the fibrotic response are being developed and appear as potential therapeutic tools in the treatment of SSc, highlighting the importance for an effective therapy targeted towards the molecular and cellular pathways. This article reviews cytokine biology in that context, with particular emphasis on immunopathology of the disease, therapeutic targeting and the way that current or emerging treatments for SSc might impact on cytokine biology.
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Affiliation(s)
- Jasmin Raja
- Centre for Rheumatology and Connective Tissue Diseases, UCL Medical School, Royal Free Campus, London, NW3 2QG, UK
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Avila-Pedretti G, Tornero J, Fernández-Nebro A, Blanco F, González-Alvaro I, Cañete JD, Maymó J, Alperiz M, Fernández-Gutiérrez B, Olivé A, Corominas H, Erra A, Aterido A, López Lasanta M, Tortosa R, Julià A, Marsal S. Variation at FCGR2A and functionally related genes is associated with the response to anti-TNF therapy in rheumatoid arthritis. PLoS One 2015; 10:e0122088. [PMID: 25848939 PMCID: PMC4388501 DOI: 10.1371/journal.pone.0122088] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 02/18/2015] [Indexed: 11/29/2022] Open
Abstract
Objective Anti-TNF therapies have been highly efficacious in the management of rheumatoid arthritis (RA), but 25–30% of patients do not show a significant clinical response. There is increasing evidence that genetic variation at the Fc receptor FCGR2A is associated with the response to anti-TNF therapy. We aimed to validate this genetic association in a patient cohort from the Spanish population, and also to identify new genes functionally related to FCGR2A that are also associated with anti-TNF response. Methods A total of 348 RA patients treated with an anti-TNF therapy were included and genotyped for FCGR2A polymorphism rs1081274. Response to therapy was determined at 12 weeks, and was tested for association globally and independently for each anti-TNF drug (infliximab, etanercept and adalimumab). Using gene expression profiles from macrophages obtained from synovial fluid of RA patients, we searched for genes highly correlated with FCGR2A expression. Tag SNPs were selected from each candidate gene and tested for association with the response to therapy. Results We found a significant association between FCGR2A and the response to adalimumab (P=0.022). Analyzing the subset of anti-CCP positive RA patients (78%), we also found a significant association between FCGR2A and the response to infliximab (P=0.035). DHX32 and RGS12 were the most consistently correlated genes with FCGR2A expression in RA synovial fluid macrophages (P<0.001). We found a significant association between the genetic variation at DHX32 (rs12356233, corrected P=0.019) and a nominally significant association between RGS12 and the response to adalimumab (rs4690093, uncorrected P=0.040). In the anti-CCP positive group of patients, we also found a nominally significant association between RGS12 and the response to infliximab (rs2857859, uncorrected P=0.042). Conclusions In the present study we have validated the FCGR2A association in an independent population, and we have identified new genes associated with the response to anti-TNF therapy in RA.
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Affiliation(s)
| | - Jesús Tornero
- Hospital Universitario De Guadalajara, Rheumatology Department, Guadalajara, Spain
| | - Antonio Fernández-Nebro
- UGC Reumatología, Instituto de Investigación Biomédica en Málaga, Hospital Regional Universitario de Málaga, Universidad de Málaga, Málaga, Spain
| | - Francisco Blanco
- INIBIC-Hospital Universitario A Coruña, Rheumatology Department, A Coruña, Spain
| | - Isidoro González-Alvaro
- Hospital Universitario de La Princesa, IIS La Princesa, Rheumatology Department, Madrid, Spain
| | - Juan D Cañete
- Hospital Clínic de Barcelona, Rheumatology Department, Barcelona, Spain
| | - Joan Maymó
- Hospital del Mar, Barcelona, Rheumatology Department, Barcelona, Spain
| | - Mercedes Alperiz
- Hospital Universitario Central de Asturias, Rheumatology Department, Oviedo, Spain
| | | | - Alex Olivé
- Hospital Universitari Germans Trias i Pujol, Rheumatology Department, Barcelona, Spain
| | - Héctor Corominas
- Hospital Moisès Broggi, Rheumatology Department, Barcelona, Spain
| | - Alba Erra
- Hospital Sant Rafael, Rheumatology Department, Barcelona, Spain
| | - Adrià Aterido
- Vall d'Hebron Hospital Research Institute, Rheumatology Research Group. Barcelona, Spain
| | - María López Lasanta
- Vall d'Hebron Hospital Research Institute, Rheumatology Research Group. Barcelona, Spain
| | - Raül Tortosa
- Vall d'Hebron Hospital Research Institute, Rheumatology Research Group. Barcelona, Spain
| | - Antonio Julià
- Vall d'Hebron Hospital Research Institute, Rheumatology Research Group. Barcelona, Spain
| | - Sara Marsal
- Vall d'Hebron Hospital Research Institute, Rheumatology Research Group. Barcelona, Spain
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Luo WW, Lian H, Zhong B, Shu HB, Li S. Krüppel-like factor 4 negatively regulates cellular antiviral immune response. Cell Mol Immunol 2014; 13:65-72. [PMID: 25531393 DOI: 10.1038/cmi.2014.125] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/20/2014] [Accepted: 11/20/2014] [Indexed: 12/13/2022] Open
Abstract
Viral infection triggers activation of the transcription factors NF-κB and IRF3, which collaborate to induce the expression of type I interferons (IFNs) and elicit innate antiviral response. In this report, we identified Krüppel-like factor 4 (KLF4) as a negative regulator of virus-triggered signaling. Overexpression of KLF4 inhibited virus-induced activation of ISRE and IFN-β promoter in various types of cells, while knockdown of KLF4 potentiated viral infection-triggered induction of IFNB1 and downstream genes and attenuated viral replication. In addition, KLF4 was found to be localized in the cytosol and nucleus, and viral infection promoted the translocation of KLF4 from cytosol to nucleus. Upon virus infection, KLF4 was bound to the promoter of IFNB gene and inhibited the recruitment of IRF3 to the IFNB promoter. Our study thus suggests that KLF4 negatively regulates cellular antiviral response.
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