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Kosik I, Da Silva Santos J, Angel M, Hu Z, Holly J, Gibbs JS, Gill T, Kosikova M, Li T, Bakhache W, Dolan PT, Xie H, Andrews SF, Gillespie RA, Kanekiyo M, McDermott AB, Pierson TC, Yewdell JW. C1q enables influenza hemagglutinin stem binding antibodies to block viral attachment and broadens the antibody escape repertoire. Sci Immunol 2024; 9:eadj9534. [PMID: 38517951 DOI: 10.1126/sciimmunol.adj9534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 02/14/2024] [Indexed: 03/24/2024]
Abstract
Antigenic drift, the gradual accumulation of amino acid substitutions in the influenza virus hemagglutinin (HA) receptor protein, enables viral immune evasion. Antibodies (Abs) specific for the drift-resistant HA stem region are a promising universal influenza vaccine target. Although anti-stem Abs are not believed to block viral attachment, here we show that complement component 1q (C1q), a 460-kilodalton protein with six Ab Fc-binding domains, confers attachment inhibition to anti-stem Abs and enhances their fusion and neuraminidase inhibition. As a result, virus neutralization activity in vitro is boosted up to 30-fold, and in vivo protection from influenza PR8 infection in mice is enhanced. These effects reflect increased steric hindrance and not increased Ab avidity. C1q greatly expands the anti-stem Ab viral escape repertoire to include residues throughout the HA, some of which cause antigenic alterations in the globular region or modulate HA receptor avidity. We also show that C1q enhances the neutralization activity of non-receptor binding domain anti-SARS-CoV-2 spike Abs, an effect dependent on spike density on the virion surface. These findings demonstrate that C1q can greatly expand Ab function and thereby contribute to viral evolution and immune escape.
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Affiliation(s)
- Ivan Kosik
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Jefferson Da Silva Santos
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Mathew Angel
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Zhe Hu
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Jaroslav Holly
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - James S Gibbs
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Tanner Gill
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Martina Kosikova
- Laboratory of Respiratory Viral Diseases, Division of Viral Products, Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Tiansheng Li
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - William Bakhache
- Quantitative Virology and Evolution Unit, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Patrick T Dolan
- Quantitative Virology and Evolution Unit, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Hang Xie
- Laboratory of Respiratory Viral Diseases, Division of Viral Products, Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Sarah F Andrews
- Vaccine Immunology Program, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Rebecca A Gillespie
- Molecular Immunoengineering Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Masaru Kanekiyo
- Molecular Immunoengineering Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Adrian B McDermott
- Vaccine Immunology Program, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Theodore C Pierson
- Viral Pathogenesis Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Jonathan W Yewdell
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
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Guo L, Yang Y, Yuan J, Ren H, Huang X, Li M, Xia L, Jiang X, Chen D, Zhang J. Da-Yuan-Yin decoction polyphenol fraction attenuates acute lung injury induced by lipopolysaccharide. PHARMACEUTICAL BIOLOGY 2023; 61:228-240. [PMID: 36655330 PMCID: PMC9858535 DOI: 10.1080/13880209.2023.2166085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 11/22/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
CONTEXT Da-Yuan-Yin is a Chinese traditional prescription. OBJECTIVE This study explores the therapeutic effects of the Da-Yuan-Yin decoction polyphenol fraction (DYY-4) on acute lung injury (ALI) in mice induced by lipopolysaccharide (LPS). MATERIALS AND METHODS The mice (n = 10) were orally administrated with DYY-4 (15, 30, and 60 mg/kg) or DXM (5 mg/kg), half an hour after LPS (2 mg/kg) instilled intratracheally. The protein content and the levels of inflammatory factors, the levels of complements, the mRNA expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), the level of myeloperoxidase (MPO) and superoxide dismutase (SOD), the expression of the IkB kinase (IKK) and nuclear factor-kappa B (NF-κB), the lung wet-to-dry weight (W/D) ratio and lung tissue were evaluated, 24 h after LPS challenge. Network pharmacology predicted potential targets. RESULTS DYY-4 (30, 60 mg/kg, p < 0.01, p < 0.01) decreased the lung W/D ratio, total protein concentration, the levels of C3, C3c and C5a, the levels of TNF-α, IL-6, and IL-1β, while increased the levels of IL-4 and IL-10. DYY-4 (60 mg/kg) decreased the levels of C5aR1, C5b-9 and COX-2 mRNA (p < 0.05), the levels of MPO and iNOS mRNA, the activation of the IKK/NF-κB pathway (p < 0.01), and increased the levels of IL-13 and SOD (p < 0.01). DYY-4 (60 mg/kg) relieved the lung tissue pathological changes and reduced the C3c deposition. DISCUSSION AND CONCLUSIONS Network pharmacology combined with animal experiments revealed the targets of DYY-4 alleviating ALI.
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Affiliation(s)
- Lengqiu Guo
- Suzhou Vocational Health College, Suzhou, China
| | - Yun Yang
- College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Jie Yuan
- Anhui Institutes for Food and Drug Control, Hefei, China
| | - Huiling Ren
- College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Xiaolei Huang
- College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Meng Li
- College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Long Xia
- School of Pharmacy, Fudan University, Shanghai, China
| | - Xiaogang Jiang
- College of Pharmaceutical Science, Soochow University, Suzhou, China
| | - Daofeng Chen
- School of Pharmacy, Fudan University, Shanghai, China
| | - Jian Zhang
- College of Pharmaceutical Science, Soochow University, Suzhou, China
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Ali YM, Lynch NJ, Shaaban AA, Rizk DE, Abdel-Rahman SH, Khatri P, Yabuki M, Yaseen S, Dudler T, Demopulos G, Schwaeble WJ. Inhibition of the lectin pathway of complement activation reduces LPS-induced acute respiratory distress syndrome in mice. Front Immunol 2023; 14:1192767. [PMID: 37325666 PMCID: PMC10262210 DOI: 10.3389/fimmu.2023.1192767] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/12/2023] [Indexed: 06/17/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a life-threatening disorder with a high rate of mortality. Complement activation in ARDS initiates a robust inflammatory reaction that can cause progressive endothelial injury in the lung. Here, we tested whether inhibition of the lectin pathway of complement could reduce the pathology and improve the outcomes in a murine model of LPS-induced lung injury that closely mimics ARDS in human. In vitro, LPS binds to murine and human collectin 11, human MBL and murine MBL-A, but not to C1q, the recognition subcomponent of the classical pathway. This binding initiates deposition of the complement activation products C3b, C4b and C5b-9 on LPS via the lectin pathway. HG-4, a monoclonal antibody that targets MASP-2, a key enzyme in the lectin pathway, inhibited lectin pathway functional activity in vitro, with an IC50 of circa 10nM. Administration of HG4 (5mg/kg) in mice led to almost complete inhibition of the lectin pathway activation for 48hrs, and 50% inhibition at 60hrs post administration. Inhibition of the lectin pathway in mice prior to LPS-induced lung injury improved all pathological markers tested. HG4 reduces the protein concentration in bronchoalveolar lavage fluid (p<0.0001) and levels of myeloid peroxide (p<0.0001), LDH (p<0.0001), TNFα and IL6 (both p<0.0001). Lung injury was significantly reduced (p<0.001) and the survival time of the mice increased (p<0.01). From the previous findings we concluded that inhibition of the lectin pathway has the potential to prevent ARDS pathology.
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Affiliation(s)
- Youssif M. Ali
- Department of Veterinary Medicine, School of Biological Sciences, University of Cambridge, Cambridge, United Kingdom
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Nicholas J. Lynch
- Department of Veterinary Medicine, School of Biological Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Ahmed A. Shaaban
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Dina E. Rizk
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Shaymaa H. Abdel-Rahman
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Priyanka Khatri
- Department of Veterinary Medicine, School of Biological Sciences, University of Cambridge, Cambridge, United Kingdom
| | | | | | | | | | - Wilhelm J. Schwaeble
- Department of Veterinary Medicine, School of Biological Sciences, University of Cambridge, Cambridge, United Kingdom
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Yang Z, Nicholson SE, Cancio TS, Cancio LC, Li Y. Complement as a vital nexus of the pathobiological connectome for acute respiratory distress syndrome: An emerging therapeutic target. Front Immunol 2023; 14:1100461. [PMID: 37006238 PMCID: PMC10064147 DOI: 10.3389/fimmu.2023.1100461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/27/2023] [Indexed: 03/19/2023] Open
Abstract
The hallmark of acute respiratory distress syndrome (ARDS) pathobiology is unchecked inflammation-driven diffuse alveolar damage and alveolar-capillary barrier dysfunction. Currently, therapeutic interventions for ARDS remain largely limited to pulmonary-supportive strategies, and there is an unmet demand for pharmacologic therapies targeting the underlying pathology of ARDS in patients suffering from the illness. The complement cascade (ComC) plays an integral role in the regulation of both innate and adaptive immune responses. ComC activation can prime an overzealous cytokine storm and tissue/organ damage. The ARDS and acute lung injury (ALI) have an established relationship with early maladaptive ComC activation. In this review, we have collected evidence from the current studies linking ALI/ARDS with ComC dysregulation, focusing on elucidating the new emerging roles of the extracellular (canonical) and intracellular (non-canonical or complosome), ComC (complementome) in ALI/ARDS pathobiology, and highlighting complementome as a vital nexus of the pathobiological connectome for ALI/ARDS via its crosstalking with other systems of the immunome, DAMPome, PAMPome, coagulome, metabolome, and microbiome. We have also discussed the diagnostic/therapeutic potential and future direction of ALI/ARDS care with the ultimate goal of better defining mechanistic subtypes (endotypes and theratypes) through new methodologies in order to facilitate a more precise and effective complement-targeted therapy for treating these comorbidities. This information leads to support for a therapeutic anti-inflammatory strategy by targeting the ComC, where the arsenal of clinical-stage complement-specific drugs is available, especially for patients with ALI/ARDS due to COVID-19.
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Affiliation(s)
- Zhangsheng Yang
- Combat Casualty Care Research Team (CRT) 3, United States (US) Army Institute of Surgical Research, Joint Base San Antonio (JBSA)-Fort Sam Houston, TX, United States
| | - Susannah E. Nicholson
- Division of Trauma Research, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Tomas S. Cancio
- Combat Casualty Care Research Team (CRT) 3, United States (US) Army Institute of Surgical Research, Joint Base San Antonio (JBSA)-Fort Sam Houston, TX, United States
| | - Leopoldo C. Cancio
- United States (US) Army Burn Center, United States (US) Army Institute of Surgical Research, Joint Base San Antonio (JBSA)-Fort Sam Houston, TX, United States
| | - Yansong Li
- Division of Trauma Research, University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
- The Geneva Foundation, Immunological Damage Control Resuscitation Program, Tacoma, WA, United States
- *Correspondence: Yansong Li,
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5
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Sahu SK, Ozantürk AN, Kulkarni DH, Ma L, Barve RA, Dannull L, Lu A, Starick M, McPhatter J, Garnica L, Sanfillipo-Burchman M, Kunen J, Wu X, Gelman AE, Brody SL, Atkinson JP, Kulkarni HS. Lung epithelial cell-derived C3 protects against pneumonia-induced lung injury. Sci Immunol 2023; 8:eabp9547. [PMID: 36735773 PMCID: PMC10023170 DOI: 10.1126/sciimmunol.abp9547] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 01/11/2023] [Indexed: 02/05/2023]
Abstract
The complement component C3 is a fundamental plasma protein for host defense, produced largely by the liver. However, recent work has demonstrated the critical importance of tissue-specific C3 expression in cell survival. Here, we analyzed the effects of local versus peripheral sources of C3 expression in a model of acute bacterial pneumonia induced by Pseudomonas aeruginosa. Whereas mice with global C3 deficiency had severe pneumonia-induced lung injury, those deficient only in liver-derived C3 remained protected, comparable to wild-type mice. Human lung transcriptome analysis showed that secretory epithelial cells, such as club cells, express high levels of C3 mRNA. Mice with tamoxifen-induced C3 gene ablation from club cells in the lung had worse pulmonary injury compared with similarly treated controls, despite maintaining normal circulating C3 levels. Last, in both the mouse pneumonia model and cultured primary human airway epithelial cells, we showed that stress-induced death associated with C3 deficiency parallels that seen in Factor B deficiency rather than C3a receptor deficiency. Moreover, C3-mediated reduction in epithelial cell death requires alternative pathway component Factor B. Thus, our findings suggest that a pathway reliant on locally derived C3 and Factor B protects the lung mucosal barrier.
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Affiliation(s)
- Sanjaya K. Sahu
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Ayşe N. Ozantürk
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Devesha H. Kulkarni
- Division of Gastroenterology, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Lina Ma
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Ruteja A Barve
- Department of Genetics, Washington University School of Medicine; St. Louis, USA
| | - Linus Dannull
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Angel Lu
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Marick Starick
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Ja’Nia McPhatter
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Lorena Garnica
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Maxwell Sanfillipo-Burchman
- Division of Allergy and Pulmonary Medicine, Department of Pediatrics, Washington University School of Medicine; St. Louis, USA
| | - Jeremy Kunen
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Xiaobo Wu
- Division of Rheumatology, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Andrew E. Gelman
- Department of Surgery, Washington University School of Medicine; St. Louis, USA
| | - Steven L. Brody
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - John P. Atkinson
- Division of Rheumatology, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
| | - Hrishikesh S. Kulkarni
- Division of Pulmonary and Critical Care Medicine, John T. Milliken Department of Medicine, Washington University School of Medicine; St. Louis, USA
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Blanc P, Liu Y, Reveneau N, Cavell B, Gorringe A, Renauld-Mongénie G. The role of bactericidal and opsonic activity in immunity against Bordetella pertussis. Expert Rev Vaccines 2022; 21:1727-1738. [PMID: 36369768 DOI: 10.1080/14760584.2022.2137145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Pertussis vaccines have drastically reduced the disease burden in humans since their implementation. Despite their success, pertussis remains an important global public health challenge. Bordetella pertussis resurgence could be a result of greater surveillance combined with improved diagnosis methods, changes in Bordetella pertussis biology, vaccine schedules, and/or coverage. Additionally, mechanisms of protection conferred by acellular pertussis (aP) and whole-cell pertussis (wP) vaccines differ qualitatively. There are no clear immune correlates of protection for pertussis vaccines. Pertussis antigens can induce toxin neutralizing antibodies, block adherence or engage complement mediated phagocytic/bactericidal killing. AREAS COVERED We reviewed the existing evidence on antibody-mediated serum bactericidal and opsonophagocytic activity and discussed the relevance of these functional antibodies in the development of next-generation pertussis vaccines. EXPERT OPINION Current paradigm proposes that wP vaccines may confer greater herd protection than aP vaccines due to their enhanced clearance of bacteria from the nasopharynx in animal models. Functional antibodies may contribute to the reduction of nasal colonization, which differentiates aP and wP vaccines. Understanding the intrinsic differences in protective immune responses elicited by each class of vaccines will help to identify biomarkers that can be used as immunological end points in clinical trials.
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Affiliation(s)
- Pascal Blanc
- Research & Development, Sanofi, Marcy l'Etoile, France
| | - Yuanqing Liu
- Research & Development, Sanofi, Marcy l'Etoile, France
| | | | - Breeze Cavell
- Department of Research and Evaluation, United Kingdom (UK) Health Security Agency, Salisbury, UK
| | - Andrew Gorringe
- Department of Research and Evaluation, United Kingdom (UK) Health Security Agency, Salisbury, UK
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Guo J, Liu QZ, Zhu FJ, Li M, Li J, Guo L, Sun QY, Yang QX. Acteoside attenuates acute lung injury following administration of cobra venom factor to mice. Heliyon 2022; 8:e11622. [PMID: 36411899 PMCID: PMC9674544 DOI: 10.1016/j.heliyon.2022.e11622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/17/2022] [Accepted: 11/07/2022] [Indexed: 11/16/2022] Open
Abstract
Background Acteoside, a water-soluble active constituent of diverse valuable medicinal vegetation, has shown strong anti-inflammatory property. However, studies on the anti-inflammatory property of acteoside in complement-induced acute lung injury (ALI) are limited. Therefore, this study aims to evaluate the anti-inflammatory activity of acteoside in cobra venom factor (CVF)-stimulated human microvascular endothelial cells (HMEC) and in ALI mice model. Methods In this study, we investigated the effects of acteoside (20, 10, and 5 μg/mL) in vitro in CVF induced HMECs and the activity of acteoside (100, 50, and 20 mg/kg/day bodyweight) in vivo in CVF induced ALI mice. Each eight male mice were orally administered acteoside or the positive drug PDTC (100 mg/kg/day) for 7 days before CVF (35 μg/kg) injection. After injection for 1 h, the pharmacological effects of acteoside were investigated by spectrophotometry, pathological examination, enzyme-linked immunosorbent assay, and immunohistochemistry. Results In vitro, acteoside (20, 10, and 5 μg/mL) reduced the protein expression of adhesion molecules and pro-inflammatory cytokines and transcriptional activity of NF-κB (P < 0.01). In vivo studies showed that acteoside dose-dependently alleviated lung histopathologic lesion, inhibited the production of the protein content of BALF, leukocyte cell number, lung MPO activity, and expression levels of IL-6, TNF-α, and ICAM-1, and suppressed the C5b-9 deposition and NF-κB activation in CVF-induced acute lung inflammation in mice (P < 0.05, 0.01). Conclusion This study demonstrates that acteoside exerts strong anti-inflammatory activities in the CVF-induced acute lung inflammation model and suggests that acteoside is a potential therapeutic agent for complement-related inflammatory diseases.
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Affiliation(s)
- Jing Guo
- School of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Center for Pharmacology and Bioactivity Research, The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Sciences, Guiyang, China
- Mordern Research Center for Traditional Chinese Medicine, Institute of Molecular Science, Shanxi University, Taiyuan 030006, China
| | - Qiao-Zhou Liu
- School of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Center for Pharmacology and Bioactivity Research, The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Sciences, Guiyang, China
- Guyuan No. 8 Middle School, Guyuan, China
| | - Fang-Juan Zhu
- School of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Center for Pharmacology and Bioactivity Research, The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Sciences, Guiyang, China
| | - Min Li
- General Ward, Guizhou Provincial People's Hospital, Guiyang, China
| | - Jiao Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Center for Pharmacology and Bioactivity Research, The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Sciences, Guiyang, China
| | - Li Guo
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Center for Pharmacology and Bioactivity Research, The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Sciences, Guiyang, China
| | - Qian-Yun Sun
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
- Center for Pharmacology and Bioactivity Research, The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Sciences, Guiyang, China
- Corresponding author.
| | - Qing-Xiong Yang
- School of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang, China
- Corresponding author.
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8
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Cohen A, Jeng EE, Voorhies M, Symington J, Ali N, Rodriguez RA, Bassik MC, Sil A. Genome-scale CRISPR screening reveals that C3aR signaling is critical for rapid capture of fungi by macrophages. PLoS Pathog 2022; 18:e1010237. [PMID: 36174103 PMCID: PMC9578593 DOI: 10.1371/journal.ppat.1010237] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 10/18/2022] [Accepted: 07/13/2022] [Indexed: 11/18/2022] Open
Abstract
The fungal pathogen Histoplasma capsulatum (Hc) invades, replicates within, and destroys macrophages. To interrogate the molecular mechanisms underlying this interaction, we conducted a host-directed CRISPR-Cas9 screen and identified 361 genes that modify macrophage susceptibility to Hc infection, greatly expanding our understanding of host gene networks targeted by Hc. We identified pathways that have not been previously implicated in Hc interaction with macrophages, including the ragulator complex (involved in nutrient stress sensing), glycosylation enzymes, protein degradation machinery, mitochondrial respiration genes, solute transporters, and the ER membrane complex (EMC). The highest scoring protective hits included the complement C3a receptor (C3aR), a G-protein coupled receptor (GPCR) that recognizes the complement fragment C3a. Although it is known that complement components react with the fungal surface, leading to opsonization and release of small peptide fragments such as C3a, a role for C3aR in macrophage interactions with fungi has not been elucidated. We demonstrated that whereas C3aR is dispensable for macrophage phagocytosis of bacteria and latex beads, it is critical for optimal macrophage capture of pathogenic fungi, including Hc, the ubiquitous fungal pathogen Candida albicans, and the causative agent of Valley Fever Coccidioides posadasii. We showed that C3aR localizes to the early phagosome during Hc infection where it coordinates the formation of actin-rich membrane protrusions that promote Hc capture. We also showed that the EMC promotes surface expression of C3aR, likely explaining its identification in our screen. Taken together, our results provide new insight into host processes that affect Hc-macrophage interactions and uncover a novel and specific role for C3aR in macrophage recognition of fungi.
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Affiliation(s)
- Allison Cohen
- University of California San Francisco, Department of Microbiology and Immunology, San Francisco, California, United States of America
| | - Edwin E. Jeng
- Stanford University, Department of Genetics, Palo Alto, California, United States of America
| | - Mark Voorhies
- University of California San Francisco, Department of Microbiology and Immunology, San Francisco, California, United States of America
| | - Jane Symington
- University of California San Francisco, Department of Microbiology and Immunology, San Francisco, California, United States of America
| | - Nebat Ali
- University of California San Francisco, Department of Microbiology and Immunology, San Francisco, California, United States of America
| | - Rosa A. Rodriguez
- University of California San Francisco, Department of Microbiology and Immunology, San Francisco, California, United States of America
| | - Michael C. Bassik
- Stanford University, Department of Genetics, Palo Alto, California, United States of America
| | - Anita Sil
- University of California San Francisco, Department of Microbiology and Immunology, San Francisco, California, United States of America
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Lamerton RE, Marcial-Juarez E, Faustini SE, Perez-Toledo M, Goodall M, Jossi SE, Newby ML, Chapple I, Dietrich T, Veenith T, Shields AM, Harper L, Henderson IR, Rayes J, Wraith DC, Watson SP, Crispin M, Drayson MT, Richter AG, Cunningham AF. SARS-CoV-2 Spike- and Nucleoprotein-Specific Antibodies Induced After Vaccination or Infection Promote Classical Complement Activation. Front Immunol 2022; 13:838780. [PMID: 35860286 PMCID: PMC9289266 DOI: 10.3389/fimmu.2022.838780] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 06/07/2022] [Indexed: 12/19/2022] Open
Abstract
Antibodies specific for the spike glycoprotein (S) and nucleocapsid (N) SARS-CoV-2 proteins are typically present during severe COVID-19, and induced to S after vaccination. The binding of viral antigens by antibody can initiate the classical complement pathway. Since complement could play pathological or protective roles at distinct times during SARS-CoV-2 infection we determined levels of antibody-dependent complement activation along the complement cascade. Here, we used an ELISA assay to assess complement protein binding (C1q) and the deposition of C4b, C3b, and C5b to S and N antigens in the presence of antibodies to SARS-CoV-2 from different test groups: non-infected, single and double vaccinees, non-hospitalised convalescent (NHC) COVID-19 patients and convalescent hospitalised (ITU-CONV) COVID-19 patients. C1q binding correlates strongly with antibody responses, especially IgG1 levels. However, detection of downstream complement components, C4b, C3b and C5b shows some variability associated with the subject group from whom the sera were obtained. In the ITU-CONV, detection of C3b-C5b to S was observed consistently, but this was not the case in the NHC group. This is in contrast to responses to N, where median levels of complement deposition did not differ between the NHC and ITU-CONV groups. Moreover, for S but not N, downstream complement components were only detected in sera with higher IgG1 levels. Therefore, the classical pathway is activated by antibodies to multiple SARS-CoV-2 antigens, but the downstream effects of this activation may differ depending the disease status of the subject and on the specific antigen targeted.
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Affiliation(s)
- Rachel E. Lamerton
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Edith Marcial-Juarez
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Sian E. Faustini
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Marisol Perez-Toledo
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Margaret Goodall
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Siân E. Jossi
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Maddy L. Newby
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Iain Chapple
- Periodontal Research Group, School of Dentistry, Institute of Clinical Sciences, University of Birmingham, and Birmingham Community Healthcare National Health Service Trust, Birmingham, United Kingdom
| | - Thomas Dietrich
- Periodontal Research Group, School of Dentistry, Institute of Clinical Sciences, University of Birmingham, and Birmingham Community Healthcare National Health Service Trust, Birmingham, United Kingdom
| | - Tonny Veenith
- Department of Critical Care Medicine, University Hospitals Birmingham National Health Service (NHS) Trust, Birmingham, United Kingdom
| | - Adrian M. Shields
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Lorraine Harper
- Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
| | - Ian R. Henderson
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia
| | - Julie Rayes
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - David C. Wraith
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Steve P. Watson
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Max Crispin
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Mark T. Drayson
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Alex G. Richter
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Adam F. Cunningham
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
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10
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Wee BA, Alves J, Lindsay DSJ, Klatt AB, Sargison FA, Cameron RL, Pickering A, Gorzynski J, Corander J, Marttinen P, Opitz B, Smith AJ, Fitzgerald JR. Population analysis of Legionella pneumophila reveals a basis for resistance to complement-mediated killing. Nat Commun 2021; 12:7165. [PMID: 34887398 PMCID: PMC8660822 DOI: 10.1038/s41467-021-27478-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 11/19/2021] [Indexed: 11/09/2022] Open
Abstract
Legionella pneumophila is the most common cause of the severe respiratory infection known as Legionnaires' disease. However, the microorganism is typically a symbiont of free-living amoeba, and our understanding of the bacterial factors that determine human pathogenicity is limited. Here we carried out a population genomic study of 902 L. pneumophila isolates from human clinical and environmental samples to examine their genetic diversity, global distribution and the basis for human pathogenicity. We find that the capacity for human disease is representative of the breadth of species diversity although some clones are more commonly associated with clinical infections. We identified a single gene (lag-1) to be most strongly associated with clinical isolates. lag-1, which encodes an O-acetyltransferase for lipopolysaccharide modification, has been distributed horizontally across all major phylogenetic clades of L. pneumophila by frequent recent recombination events. The gene confers resistance to complement-mediated killing in human serum by inhibiting deposition of classical pathway molecules on the bacterial surface. Furthermore, acquisition of lag-1 inhibits complement-dependent phagocytosis by human neutrophils, and promoted survival in a mouse model of pulmonary legionellosis. Thus, our results reveal L. pneumophila genetic traits linked to disease and provide a molecular basis for resistance to complement-mediated killing.
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Affiliation(s)
- Bryan A Wee
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, UK
| | - Joana Alves
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, UK
| | - Diane S J Lindsay
- Bacterial Respiratory Infections Service (Ex Mycobacteria), Scottish Microbiology Reference Laboratory, Glasgow, Scotland, UK
| | - Ann-Brit Klatt
- Department of Internal Medicine/Infectious Diseases and Pulmonary Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Fiona A Sargison
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, UK
| | - Ross L Cameron
- NHS National Services Scotland, Health Protection Scotland, Glasgow, Scotland, UK
| | - Amy Pickering
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, UK
| | - Jamie Gorzynski
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, UK
| | - Jukka Corander
- Department of Mathematics and Statistics, University of Helsinki, Helsinki, Finland
- Department of Biostatistics, University of Oslo, Oslo, Norway
| | - Pekka Marttinen
- Helsinki Institute for Information Technology, Department of Computer Science, Aalto University, Aalto, Finland
| | - Bastian Opitz
- Department of Internal Medicine/Infectious Diseases and Pulmonary Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Andrew J Smith
- Bacterial Respiratory Infections Service (Ex Mycobacteria), Scottish Microbiology Reference Laboratory, Glasgow, Scotland, UK
- College of Medical, Veterinary & Life Sciences, Glasgow Dental Hospital & School, University of Glasgow, Glasgow, UK
| | - J Ross Fitzgerald
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, Scotland, UK.
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11
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Smole U, Kratzer B, Pickl WF. Soluble pattern recognition molecules: Guardians and regulators of homeostasis at airway mucosal surfaces. Eur J Immunol 2020; 50:624-642. [PMID: 32246830 PMCID: PMC7216992 DOI: 10.1002/eji.201847811] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/25/2020] [Accepted: 03/31/2020] [Indexed: 01/08/2023]
Abstract
Maintenance of homeostasis at body barriers that are constantly challenged by microbes, toxins and potentially bioactive (macro)molecules requires complex, highly orchestrated mechanisms of protection. Recent discoveries in respiratory research have shed light on the unprecedented role of airway epithelial cells (AEC), which, besides immune cells homing to the lung, also significantly contribute to host defence by expressing membrane‐bound and soluble pattern recognition receptors (sPRR). Recent evidence suggests that distinct, evolutionary ancient, sPRR secreted by AEC might become activated by usually innocuous proteins, commonly referred to as allergens. We here provide a systematic overview on sPRR detectable in the mucus lining of AEC. Some of them become actively produced and secreted by AECs (like the pentraxins C‐reactive protein and pentraxin 3; the collectins mannose binding protein and surfactant proteins A and D; H‐ficolin; serum amyloid A; and the complement components C3 and C5). Others are elaborated by innate and adaptive immune cells such as monocytes/macrophages and T cells (like the pentraxins C‐reactive protein and pentraxin 3; L‐ficolin; serum amyloid A; and the complement components C3 and C5). Herein we discuss how sPRRs may contribute to homeostasis but sometimes also to overt disease (e.g. airway hyperreactivity and asthma) at the alveolar–air interface.
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Affiliation(s)
- Ursula Smole
- Institute of ImmunologyCenter for PathophysiologyInfectiology and ImmunologyMedical University of ViennaViennaAustria
| | - Bernhard Kratzer
- Institute of ImmunologyCenter for PathophysiologyInfectiology and ImmunologyMedical University of ViennaViennaAustria
| | - Winfried F. Pickl
- Institute of ImmunologyCenter for PathophysiologyInfectiology and ImmunologyMedical University of ViennaViennaAustria
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12
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Wu X, Yao D, Bao L, Liu D, Xu X, An Y, Zhang X, Cao B. Ficolin A derived from local macrophages and neutrophils protects against lipopolysaccharide-induced acute lung injury by activating complement. Immunol Cell Biol 2020; 98:595-606. [PMID: 32339310 DOI: 10.1111/imcb.12344] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 12/12/2022]
Abstract
Ficolins are important and widely distributed pattern recognition molecules that can induce lectin complement pathway activation and initiate the innate immune response. Although ficolins can bind lipopolysaccharide (LPS) in vitro, the sources, dynamic changes and roles of local ficolins in LPS-induced pulmonary inflammation and injury remain poorly understood. In this study, we established a ficolin knockout mouse model by clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9) technology, and used flow cytometry and hematoxylin and eosin staining to study the expressions and roles of local ficolins in LPS-induced pulmonary inflammation and injury. Our results show that besides ficolin B (FcnB), ficolin A (FcnA) is also expressed in leukocytes from the bone marrow, peripheral blood, lung and spleen. Further analyses showed that macrophages and neutrophils are the main sources of FcnA and FcnB, and T and B cells also express a small amount of FcnB. The intranasal administration of LPS induced local pulmonary inflammation with the increased recruitment of macrophages and neutrophils. LPS stimulation induced increased expression of FcnA and FcnB in neutrophils at the acute stage and in macrophages at the late stage. The severity of the lung injury and local inflammation of Fcna-/- mice was increased by the induction of extracellular complement activation. The recovery of LPS-induced local lung inflammation and injury was delayed in Fcnb-/- mice. Hence, these findings suggested that the local macrophage- and neutrophil-derived FcnA protects against LPS-induced acute lung injury by mediating extracellular complement activation.
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Affiliation(s)
- Xu Wu
- National Clinical Research Center for Respiratory Diseases, Clinical Center for Pulmonary Infections, China-Japan Friendship Hospital, Capital Medical University, Beijing, 100029, China
| | - Duoduo Yao
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Linlin Bao
- NHC Key Laboratory of Human Disease Comparative Medicine , Beijing Key Laboratory for Animal Models of Emerging and Remerging Infectious Diseases, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical College, Beijing, 100021, China
| | - Di Liu
- Core Facility for Protein Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xiaoxue Xu
- Department of Core Facility Center, Capital Medical University, Beijing, 100069, China
| | - Yunqing An
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Xulong Zhang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Bin Cao
- National Clinical Research Center for Respiratory Diseases, Clinical Center for Pulmonary Infections, China-Japan Friendship Hospital, Capital Medical University, Beijing, 100029, China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100006, China
- Tsinghua University-Peking University Joint Center for Life Sciences, Beijing, 100084, China
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13
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Opsonophagocytosis of Chlamydia pneumoniae by Human Monocytes and Neutrophils. Infect Immun 2020; 88:IAI.00087-20. [PMID: 32284372 DOI: 10.1128/iai.00087-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/07/2020] [Indexed: 01/08/2023] Open
Abstract
The human respiratory tract pathogen Chlamydia pneumoniae, which causes mild to severe infections, has been associated with the development of chronic inflammatory diseases. To understand the biology of C. pneumoniae infections, several studies have investigated the interaction between C. pneumoniae and professional phagocytes. However, these studies have been conducted under nonopsonizing conditions, making the role of opsonization in C. pneumoniae infections elusive. Thus, we analyzed complement and antibody opsonization of C. pneumoniae and evaluated how opsonization affects chlamydial infectivity and phagocytosis in human monocytes and neutrophils. We demonstrated that IgG antibodies and activation products of complement C3 and C4 are deposited on the surface of C. pneumoniae elementary bodies when incubated in human serum. Complement activation limits C. pneumoniae infectivity in vitro and has the potential to induce bacterial lysis by the formation of the membrane attack complex. Coculture of C. pneumoniae and freshly isolated human leukocytes showed that complement opsonization is superior to IgG opsonization for efficient opsonophagocytosis of C. pneumoniae in monocytes and neutrophils. Neutrophil-mediated phagocytosis of C. pneumoniae was crucially dependent on opsonization, while monocytes retained minor phagocytic potential under nonopsonizing conditions. Complement opsonization significantly enhanced the intracellular neutralization of C. pneumoniae in peripheral blood mononuclear cells and neutrophils and almost abrogated the infectious potential of C. pneumoniae In conclusion, we demonstrated that complements limit C. pneumoniae infection in vitro by interfering with C. pneumoniae entry into permissive cells by direct complement-induced lysis and by tagging bacteria for efficient phagocytosis in both monocytes and neutrophils.
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14
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Wang SS, Bi HZ, Chu SF, Dong YX, He WB, Tian YJ, Zang YD, Zhang DM, Zhang Z, Chen NH. CZ-7, a new derivative of Claulansine F, promotes remyelination induced by cuprizone by enhancing myelin debris clearance. Brain Res Bull 2020; 159:67-78. [PMID: 32289743 DOI: 10.1016/j.brainresbull.2020.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/18/2020] [Accepted: 03/23/2020] [Indexed: 12/11/2022]
Abstract
The mechanism of demyelinating diseases is controversial, while demyelination and remyeliantion disorder is the acknowledged etiology and therapeutic target. Untill now, there is no efficient therapy for these diseases. CZ-7, a new derivative of Claulansine F, which has been reported before, were investigated its pro-remyelination effect and its associated mechanism in cuprizone (CPZ)-induced demyelination model. In this study, male C57BL/6 mice were subjected to CPZ (300 mg/kg) through intragastric gavage and were orally administered CZ-7 (20 mg/kg) meanwhile. The results of weight monitoring and behavioral testing showed that CZ-7 can significantly improve behavior dysfunction in the demyelinating mice. Luxol-fast blue (LFB) staining, myelin basic protein (MBP) immunostaining, transmission electron microscopy (TEM) and QPCR results indicated the therapeutic effect of CZ-7 on CPZ mice model. Furthermore, degraded myelin basic protein (dMBP) immunofluorescent staining and oil red O staining showed that CZ-7 contributed to the clearance of degraded myelin debris. More microglia displayed phagocytic shape assembled in corpus callosum (CC) and there was an active process of phagocytosis in microglia after CZ-7 treatment. Immunofluorescent staining and QPCR analysis revealed the M2-polarized phenotype switch of microglia in the process of myelin debris removel, which demostrated the microenvironment improvement of CZ-7. Moreover, immunofluorescent staining of NG2 and O4 demonstated that more oligodendrocyte precursor cells (OPCs) existed in CC after CZ-7 treatment. In conclusion, our results demonstrated CZ-7 has a potential therapeutic effect for MS and other demyelinating diseases through enhancing myelin debris clearance to improve the microenvironment.
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Affiliation(s)
- Sha-Sha Wang
- Institute of Pharmaceutical & Food Engineering, Shanxi University of Traditional Chinese Medicine, Taiyuan, 030619, China; State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Hao-Zhi Bi
- Institute of Pharmaceutical & Food Engineering, Shanxi University of Traditional Chinese Medicine, Taiyuan, 030619, China
| | - Shi-Feng Chu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Yi-Xiao Dong
- Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Wen-Bin He
- Institute of Pharmaceutical & Food Engineering, Shanxi University of Traditional Chinese Medicine, Taiyuan, 030619, China
| | - Ya-Juan Tian
- Institute of Pharmaceutical & Food Engineering, Shanxi University of Traditional Chinese Medicine, Taiyuan, 030619, China
| | - Ying-Da Zang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Dong-Ming Zhang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Zhao Zhang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.
| | - Nai-Hong Chen
- Institute of Pharmaceutical & Food Engineering, Shanxi University of Traditional Chinese Medicine, Taiyuan, 030619, China; State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China; Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China.
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15
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Parente R, Doni A, Bottazzi B, Garlanda C, Inforzato A. The complement system in Aspergillus fumigatus infections and its crosstalk with pentraxins. FEBS Lett 2020; 594:2480-2501. [PMID: 31994174 DOI: 10.1002/1873-3468.13744] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/19/2019] [Accepted: 01/16/2020] [Indexed: 12/13/2022]
Abstract
Aspergillosis is a life-threatening infection mostly affecting immunocompromised individuals and primarily caused by the saprophytic fungus Aspergillus fumigatus. At the host-pathogen interface, both cellular and humoral components of the innate immune system are increasingly acknowledged as essential players in the recognition and disposal of this opportunistic mold. Fundamental hereof is the contribution of the complement system, which deploys all three activation pathways in the battle against A. fumigatus, and functionally cooperates with other soluble pattern recognition molecules, including pentraxins. In particular, preclinical and clinical observations point to the long pentraxin PTX3 as a nonredundant and complement-dependent effector with protective functions against A. fumigatus. Based on past and current literature, here we discuss how the complement participates in the immune response to this fungal pathogen, and illustrate its crosstalk with the pentraxins, with a focus on PTX3. Emphasis is placed on the molecular mechanisms underlying such processes, the genetic evidence from human epidemiology, and the translational potential of the currently available knowledge.
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Affiliation(s)
- Raffaella Parente
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Andrea Doni
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Barbara Bottazzi
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy
| | - Cecilia Garlanda
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Antonio Inforzato
- Department of Immunology and Inflammation, Humanitas Clinical and Research Institute - IRCCS, Milan, Italy.,Department of Biomedical Sciences, Humanitas University, Milan, Italy
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16
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Kulkarni HS, Elvington ML, Perng YC, Liszewski MK, Byers DE, Farkouh C, Yusen RD, Lenschow DJ, Brody SL, Atkinson JP. Intracellular C3 Protects Human Airway Epithelial Cells from Stress-associated Cell Death. Am J Respir Cell Mol Biol 2019; 60:144-157. [PMID: 30156437 DOI: 10.1165/rcmb.2017-0405oc] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The complement system provides host defense against pathogens and environmental stress. C3, the central component of complement, is present in the blood and increases in BAL fluid after injury. We recently discovered that C3 is taken up by certain cell types and cleaved intracellularly to C3a and C3b. C3a is required for CD4+ T-cell survival. These observations made us question whether complement operates at environmental interfaces, particularly in the respiratory tract. We found that airway epithelial cells (AECs, represented by both primary human tracheobronchial cells and BEAS-2B [cell line]) cultured in C3-free media were unique from other cell types in that they contained large intracellular stores of de novo synthesized C3. A fraction of this protein reduced ("storage form") but the remainder did not, consistent with it being pro-C3 ("precursor form"). These two forms of intracellular C3 were absent in CRISPR knockout-induced C3-deficient AECs and decreased with the use of C3 siRNA, indicating endogenous generation. Proinflammatory cytokine exposure increased both stored and secreted forms of C3. Furthermore, AECs took up C3 from exogenous sources, which mitigated stress-associated cell death (e.g., from oxidative stress or starvation). C3 stores were notably increased within AECs in lung tissues from individuals with different end-stage lung diseases. Thus, at-risk cells furnish C3 through biosynthesis and/or uptake to increase locally available C3 during inflammation, while intracellularly, these stores protect against certain inducers of cell death. These results establish the relevance of intracellular C3 to airway epithelial biology and suggest novel pathways for complement-mediated host protection in the airway.
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Affiliation(s)
- Hrishikesh S Kulkarni
- 1 Division of Pulmonary and Critical Care Medicine, and.,2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Michelle L Elvington
- 2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Yi-Chieh Perng
- 2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - M Kathryn Liszewski
- 2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Derek E Byers
- 1 Division of Pulmonary and Critical Care Medicine, and
| | - Christopher Farkouh
- 2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Roger D Yusen
- 1 Division of Pulmonary and Critical Care Medicine, and
| | - Deborah J Lenschow
- 2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | | | - John P Atkinson
- 2 Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
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17
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Subclinical endometritis in dairy cattle is associated with distinct mRNA expression patterns in blood and endometrium. PLoS One 2019; 14:e0220244. [PMID: 31374089 PMCID: PMC6677313 DOI: 10.1371/journal.pone.0220244] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 07/11/2019] [Indexed: 02/06/2023] Open
Abstract
Cattle with subclinical endometritis (SCE) are sub-fertile and diagnosing subclinical uterine disease remains a challenge. The hypothesis for this study was that endometrial inflammation is reflected in mRNA expression patterns of peripheral blood leucocytes. Transcriptome profiles were evaluated in healthy cows and in cows with SCE using circulating white blood cells (WBC) and endometrial biopsy samples collected from the same animals at 45–55 days postpartum. Bioinformatic analyses of microarray-based transcriptional data identified gene profiles associated with distinct biological functions in circulating WBC and endometrium. In circulating WBC, SCE promotes a pro-inflammatory environment, whereas functions related to tissue remodeling are also affected in the endometrium. Nineteen differentially expressed genes associated with SCE were common to both circulating WBC and the endometrium. Among these genes, transcript abundance of immune factors C3, C2, LTF, PF4 and TRAPPC13 were up-regulated in SCE cows at 45–55 days postpartum. Moreover, mRNA expression of C3, CXCL8, LTF, TLR2 and TRAPPC13 was temporally regulated during the postpartum period in circulating WBC of healthy cows compared with SCE cows. This observation might indicate an advantageous modulation of the immune system in healthy animals. The transcript abundance of these genes represents a potential source of indicators for postpartum uterine health.
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18
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Huang XL, Wei XC, Guo LQ, Zhao L, Chen XH, Cui YD, Yuan J, Chen DF, Zhang J. The therapeutic effects of Jaceosidin on lipopolysaccharide-induced acute lung injury in mice. J Pharmacol Sci 2019; 140:228-235. [DOI: 10.1016/j.jphs.2019.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/01/2019] [Accepted: 07/04/2019] [Indexed: 12/18/2022] Open
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19
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Nova Z, Skovierova H, Calkovska A. Alveolar-Capillary Membrane-Related Pulmonary Cells as a Target in Endotoxin-Induced Acute Lung Injury. Int J Mol Sci 2019; 20:ijms20040831. [PMID: 30769918 PMCID: PMC6412348 DOI: 10.3390/ijms20040831] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 02/06/2023] Open
Abstract
The main function of the lungs is oxygen transport from the atmosphere into the blood circulation, while it is necessary to keep the pulmonary tissue relatively free of pathogens. This is a difficult task because the respiratory system is constantly exposed to harmful substances entering the lungs by inhalation or via the blood stream. Individual types of lung cells are equipped with the mechanisms that maintain pulmonary homeostasis. Because of the clinical significance of acute respiratory distress syndrome (ARDS) the article refers to the physiological role of alveolar epithelial cells type I and II, endothelial cells, alveolar macrophages, and fibroblasts. However, all these cells can be damaged by lipopolysaccharide (LPS) which can reach the airspaces as the major component of the outer membrane of Gram-negative bacteria, and lead to local and systemic inflammation and toxicity. We also highlight a negative effect of LPS on lung cells related to alveolar-capillary barrier and their response to LPS exposure. Additionally, we describe the molecular mechanism of LPS signal transduction pathway in lung cells.
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Affiliation(s)
- Zuzana Nova
- Department of Physiology and Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Henrieta Skovierova
- Biomedical Center Martin, Division of Molecular Medicine, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Andrea Calkovska
- Department of Physiology and Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
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20
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Shende R, Wong SSW, Rapole S, Beau R, Ibrahim-Granet O, Monod M, Gührs KH, Pal JK, Latgé JP, Madan T, Aimanianda V, Sahu A. Aspergillus fumigatus conidial metalloprotease Mep1p cleaves host complement proteins. J Biol Chem 2018; 293:15538-15555. [PMID: 30139746 PMCID: PMC6177592 DOI: 10.1074/jbc.ra117.001476] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 08/02/2018] [Indexed: 12/30/2022] Open
Abstract
Innate immunity in animals including humans encompasses the complement system, which is considered an important host defense mechanism against Aspergillus fumigatus, one of the most ubiquitous opportunistic human fungal pathogens. Previously, it has been shown that the alkaline protease Alp1p secreted from A. fumigatus mycelia degrades the complement components C3, C4, and C5. However, it remains unclear how the fungal spores (i.e. conidia) defend themselves against the activities of the complement system immediately after inhalation into the lung. Here, we show that A. fumigatus conidia contain a metalloprotease Mep1p, which is released upon conidial contact with collagen and inactivates all three complement pathways. In particular, Mep1p efficiently inactivated the major complement components C3, C4, and C5 and their activation products (C3a, C4a, and C5a) as well as the pattern-recognition molecules MBL and ficolin-1, either by directly cleaving them or by cleaving them to a form that is further broken down by other proteases of the complement system. Moreover, incubation of Mep1p with human serum significantly inhibited the complement hemolytic activity and conidial opsonization by C3b and their subsequent phagocytosis by macrophages. Together, these results indicate that Mep1p associated with and released from A. fumigatus conidia likely facilitates early immune evasion by disarming the complement defense in the human host.
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Affiliation(s)
- Rajashri Shende
- From the Complement Biology Laboratory and
- the Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Tathawade, Pune-411033, India
| | | | - Srikanth Rapole
- Proteomics Laboratory, National Centre for Cell Science, S. P. Pune University Campus, Ganeshkhind, Pune-411007, India
| | | | | | - Michel Monod
- the Service de Dermatologie, Laboratoire de Mycologie, Centre Hospitalier Universitaire Vaudois, 1011 Lausanne, Switzerland
| | - Karl-Heinz Gührs
- the Leibniz Institute on Aging-Fritz Lipmann Institute, Jena-07745, Germany, and
| | - Jayanta Kumar Pal
- the Dr. D. Y. Patil Biotechnology and Bioinformatics Institute, Dr. D. Y. Patil Vidyapeeth, Tathawade, Pune-411033, India
| | | | - Taruna Madan
- the ICMR-National Institute for Research in Reproductive Health, Parel, Mumbai-400012, India
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21
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Mulligan JK, Patel K, Williamson T, Reaves N, Carroll W, Stephenson SE, Gao P, Drake RR, Neely BA, Tomlinson S, Schlosser RJ, Atkinson C. C3a receptor antagonism as a novel therapeutic target for chronic rhinosinusitis. Mucosal Immunol 2018; 11:1375-1385. [PMID: 29907871 PMCID: PMC6162114 DOI: 10.1038/s41385-018-0048-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 04/05/2018] [Accepted: 04/30/2018] [Indexed: 02/04/2023]
Abstract
Chronic rhinosinusitis with nasal polyps (CRSwNP) is an inflammatory disease with an unknown etiology. Recent studies have implicated the complement system as a potential modulator of disease immunopathology. We performed proteomic pathway enrichment analysis of differentially increased proteins, and found an enrichment of complement cascade pathways in the nasal mucus of individuals with CRSwNP as compared to control subjects. Sinonasal mucus levels of complement 3 (C3) correlated with worse subjective disease severity, whereas no significant difference in systemic C3 levels could be determined in plasma samples. Given that human sinonasal epithelial cells were the predominate sinonasal source of C3 and complement anaphylatoxin 3a (C3a) staining, we focused on their role in in vitro studies. Baseline intracellular C3 levels were higher in CRSwNP cells, and following exposure to Aspergillus fumigatus (Af) extract, they released significantly more C3 and C3a. Inhibition of complement 3a receptor (C3aR) signaling led to a decrease in Af-induced C3 and C3a release, both in vitro and in vivo. Finally, we found in vivo that C3aR deficiency or inhibition significantly reduced inflammation and CRS development in a mouse model of Af-induced CRS. These findings demonstrate that local sinonasal complement activation correlates with subjective disease severity, and that local C3aR antagonism significantly ameliorates Af-induced CRS in a rodent model.
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Affiliation(s)
- Jennifer K Mulligan
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, USA
| | - Kunal Patel
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
- Lee Patterson Allen Transplant Immunobiology Laboratory, Department of Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Tucker Williamson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - Nicholas Reaves
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - William Carroll
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Sarah E Stephenson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - Peng Gao
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, USA
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC, USA
| | - Benjamin A Neely
- Marine Biochemical Sciences, National Institute of Standards and Technology, Charleston, SC, USA
| | - Stephen Tomlinson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
| | - Rodney J Schlosser
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC, USA
- Ralph H. Johnson VA Medical Center, Charleston, SC, USA
| | - Carl Atkinson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA.
- Lee Patterson Allen Transplant Immunobiology Laboratory, Department of Surgery, Medical University of South Carolina, Charleston, SC, USA.
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22
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Hansen SWK, Aagaard JB, Bjerrum KB, Hejbøl EK, Nielsen O, Schrøder HD, Skjoedt K, Sørensen AL, Graversen JH, Henriksen ML. CL-L1 and CL-K1 Exhibit Widespread Tissue Distribution With High and Co-Localized Expression in Secretory Epithelia and Mucosa. Front Immunol 2018; 9:1757. [PMID: 30108587 PMCID: PMC6079254 DOI: 10.3389/fimmu.2018.01757] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 07/16/2018] [Indexed: 02/03/2023] Open
Abstract
Collectin liver 1 (CL-L1, alias collectin 10) and collectin kidney 1 (CL-K1, alias collectin 11) are oligomeric pattern recognition molecules associated with the complement system, and mutations in either of their genes may lead to deficiency and developmental defects. The two collectins are reportedly localized and synthesized in the liver, kidneys, and adrenals, and can be found in the circulation as heteromeric complexes (CL-LK), which upon binding to microbial high mannose-like glycoconjugates activates the complement system via the lectin activation pathway. The tissue distribution of homo- vs. heteromeric CL-L1 and -K1 complexes, the mechanism of heteromeric complex formation and in which tissues this occurs, is hitherto incompletely described. We have by immunohistochemistry using monoclonal antibodies addressed the precise cellular localization of the two collectins in the main human tissues. We find that the two collectins have widespread and almost identical tissue distribution with a high expression in epithelial cells in endo-/exocrine secretory tissues and mucosa. There is also accordance between localization of mRNA transcripts and detection of proteins, showing that local synthesis likely is responsible for peripheral localization and eventual formation of the CL-LK complexes. The functional implications of the high expression in endo-/exocrine secretory tissue and mucosa is unknown but might be associated with the activity of MASP-3, which has a similar pattern of expression and is known to potentiate the activity of the alternative complement activation pathway.
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Affiliation(s)
- Soren W K Hansen
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Josephine B Aagaard
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Karen B Bjerrum
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Eva K Hejbøl
- Department of Pathology, Odense University Hospital, Odense, Denmark
| | - Ole Nielsen
- Department of Pathology, Odense University Hospital, Odense, Denmark
| | - Henrik D Schrøder
- Department of Pathology, Odense University Hospital, Odense, Denmark
| | - Karsten Skjoedt
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Anna L Sørensen
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Jonas H Graversen
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
| | - Maiken L Henriksen
- Institute of Cancer and Inflammation Research, University of Southern Denmark, Odense, Denmark
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23
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Paulsson M, Che KF, Ahl J, Tham J, Sandblad L, Smith ME, Qvarfordt I, Su YC, Lindén A, Riesbeck K. Bacterial Outer Membrane Vesicles Induce Vitronectin Release Into the Bronchoalveolar Space Conferring Protection From Complement-Mediated Killing. Front Microbiol 2018; 9:1559. [PMID: 30061873 PMCID: PMC6055051 DOI: 10.3389/fmicb.2018.01559] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 06/22/2018] [Indexed: 11/13/2022] Open
Abstract
Pathogens causing pneumonia utilize the complement regulator vitronectin to evade complement-mediated killing. Although vitronectin is associated with several chronic lung diseases, the role of bronchoalveolar vitronectin in pneumonia has not been studied. This study sought to reveal the involvement of vitronectin in the bronchoalveolar space during pneumonia, to assess the effect of outer membrane vesicles and endotoxin on vitronectin release, and to determine whether bacterial pathogens utilize pulmonary vitronectin for evasion. Vitronectin was analyzed in cell-free bronchoalveolar lavage fluid harvested from patients with pneumonia (n = 8) and from healthy volunteers after subsegmental endotoxin instillation (n = 13). Vitronectin binding by Pseudomonas aeruginosa and Haemophilus influenzae was analyzed, and subsequent complement evasion was assessed by serum challenge. The effects of outer membrane vesicles on vitronectin production in mouse lungs and human type II alveolar epithelial cells (A549) were determined. We detected increased vitronectin concentrations in lavage fluid during pneumonia (p = 0.0063) and after bronchial endotoxin challenge (p = 0.016). The capture of vitronectin by bacteria significantly reduced complement-mediated lysis. Following challenge with vesicles, vitronectin was detected in mouse bronchoalveolar space, and mouse alveolar epithelial cells in vivo as well as A549 cells in vitro contained increased levels of vitronectin. Taken together, outer membrane vesicles and endotoxin from Gram-negative bacteria induce vitronectin, which is released into the bronchoalveolar space, and used for evasion of complement-mediated clearance.
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Affiliation(s)
- Magnus Paulsson
- Clinical Microbiology, Department of Translational Medicine, Faculty of Medicine, Lund University, Lund, Sweden
| | - Karlhans F Che
- Unit for Lung and Airway Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Ahl
- Infectious Diseases Research Unit, Department of Translational Medicine, Lund University, Lund, Sweden
| | - Johan Tham
- Infectious Diseases Research Unit, Department of Translational Medicine, Lund University, Lund, Sweden
| | - Linda Sandblad
- Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Margaretha E Smith
- Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Ingemar Qvarfordt
- Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Yu-Ching Su
- Clinical Microbiology, Department of Translational Medicine, Faculty of Medicine, Lund University, Lund, Sweden
| | - Anders Lindén
- Unit for Lung and Airway Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Respiratory Medicine and Allergy, New Karolinska Solna, Karolinska University Hospital, Stockholm, Sweden
| | - Kristian Riesbeck
- Clinical Microbiology, Department of Translational Medicine, Faculty of Medicine, Lund University, Lund, Sweden
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24
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Masuda N, Mantani Y, Yuasa H, Yoshitomi C, Arai M, Nishida M, Qi WM, Kawano J, Yokoyama T, Hoshi N, Kitagawa H. Immunohistochemical study on the distribution of β-defensin 1 and β-defensin 2 throughout the respiratory tract of healthy rats. J Vet Med Sci 2018; 80:395-404. [PMID: 29311494 PMCID: PMC5880817 DOI: 10.1292/jvms.17-0686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The distributions of β-defensin 1 and 2 in secretory host defense system throughout respiratory tract of healthy rats were immunohistochemically investigated. In the nasal epithelium, a
large number of non-ciliated and non-microvillous cells (NCs) were immunopositive for both β-defensin 1 and 2, whereas a small number of goblet cells (GCs) were immunopositive only for
β-defensin 1. Beta-defensin 2-immunopositive GCs were few. In the nasal glands, a small number of acinar cells and a large number of ductal epithelial cells were immunopositive for both
β-defensins. In the laryngeal and tracheal epithelia, a very few NCs and GCs were immunopositive for both β-defensins. In laryngeal and tracheal glands, a very few acinar cells and a large
number of ductal epithelial cells were immunopositive for both β-defensins. In the extra-pulmonary bronchus, a small number of NCs were immunopositive for both β-defensins. A small number of
GCs were immunopositive for β-defensin 1, whereas few GCs were immunopositive for β-defensin 2. From the intra-pulmonary bronchus to alveoli, a very few or no epithelial cells were
immunopositive for both β-defensins. In the mucus and periciliary layers, β-defensin 1 was detected from the nose to the extra-pulmonary bronchus, whereas β-defensin 2 was weakly detected
only in the nose and the larynx. These findings suggest that the secretory sources of β-defensin 1 and 2 are mainly distributed in the nasal mucosa and gradually decrease toward the caudal
airway in healthy rats.
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Affiliation(s)
- Natsumi Masuda
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Youhei Mantani
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Hideto Yuasa
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Chiaki Yoshitomi
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Masaya Arai
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Miho Nishida
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Wang-Mei Qi
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Inner Mongolia Agricultural University, 306 Zhaowuda Road, Huhhot, Inner Mongolia 010018, P. R. China
| | - Junichi Kawano
- Laboratory of Microbiology and Immunology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Toshifumi Yokoyama
- Laboratory of Molecular Morphology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Nobuhiko Hoshi
- Laboratory of Molecular Morphology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Hiroshi Kitagawa
- Laboratory of Histophysiology, Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
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25
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Janga H, Cassidy L, Wang F, Spengler D, Oestern-Fitschen S, Krause MF, Seekamp A, Tholey A, Fuchs S. Site-specific and endothelial-mediated dysfunction of the alveolar-capillary barrier in response to lipopolysaccharides. J Cell Mol Med 2017; 22:982-998. [PMID: 29210175 PMCID: PMC5783864 DOI: 10.1111/jcmm.13421] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 09/12/2017] [Indexed: 12/16/2022] Open
Abstract
Infectious agents such as lipopolysaccharides (LPS) challenge the functional properties of the alveolar‐capillary barrier (ACB) in the lung. In this study, we analyse the site‐specific effects of LPS on the ACB and reveal the effects on the individual cell types and the ACB as a functional unit. Monocultures of H441 epithelial cells and co‐cultures of H441 with endothelial cells cultured on Transwells® were treated with LPS from the apical or basolateral compartment. Barrier properties were analysed by the transepithelial electrical resistance (TEER), by transport assays, and immunostaining and assessment of tight junctional molecules at protein level. Furthermore, pro‐inflammatory cytokines and immune‐modulatory molecules were evaluated by ELISA and semiquantitative real‐time PCR. Liquid chromatography–mass spectrometry‐based proteomics (LS‐MS) was used to identify proteins and effector molecules secreted by endothelial cells in response to LPS. In co‐cultures treated with LPS from the basolateral compartment, we noticed a significant reduction of TEER, increased permeability and induction of pro‐inflammatory cytokines. Conversely, apical treatment did not affect the barrier. No changes were noticed in H441 monoculture upon LPS treatment. However, LPS resulted in an increased expression of pro‐inflammatory cytokines such as IL‐6 in OEC and in turn induced the reduction of TEER and an increase in SP‐A expression in H441 monoculture, and H441/OEC co‐cultures after LPS treatment from basolateral compartment. LS‐MS‐based proteomics revealed factors associated with LPS‐mediated lung injury such as ICAM‐1, VCAM‐1, Angiopoietin 2, complement factors and cathepsin S, emphasizing the role of epithelial–endothelial crosstalk in the ACB in ALI/ARDS.
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Affiliation(s)
- Harshavardhan Janga
- Department of Trauma Surgery and Orthopedics, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Liam Cassidy
- Systematic Proteomics & Bioanalytics, Institut für Experimentelle Medizin, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - Fanlu Wang
- Department of Trauma Surgery and Orthopedics, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Dietmar Spengler
- Department of Pediatrics, University Medical Center Schleswig- Holstein, Kiel, Germany
| | - Stefanie Oestern-Fitschen
- Department of Trauma Surgery and Orthopedics, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Martin F Krause
- Department of Pediatrics, University Medical Center Schleswig- Holstein, Kiel, Germany
| | - Andreas Seekamp
- Department of Trauma Surgery and Orthopedics, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Andreas Tholey
- Systematic Proteomics & Bioanalytics, Institut für Experimentelle Medizin, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - Sabine Fuchs
- Department of Trauma Surgery and Orthopedics, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
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26
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Torrelles JB, Schlesinger LS. Integrating Lung Physiology, Immunology, and Tuberculosis. Trends Microbiol 2017; 25:688-697. [PMID: 28366292 PMCID: PMC5522344 DOI: 10.1016/j.tim.2017.03.007] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 03/03/2017] [Accepted: 03/10/2017] [Indexed: 11/17/2022]
Abstract
Lungs are directly exposed to the air, have enormous surface area, and enable gas exchange in air-breathing animals. They are constantly 'attacked' by microbes from both outside and inside and thus possess a unique, highly regulated local immune defense system which efficiently allows for microbial clearance while minimizing damaging inflammatory responses. As a prototypic host-adapted airborne pathogen, Mycobacterium tuberculosis traverses the lung and has several 'interaction points' (IPs) which it must overcome to cause infection. These interactions are critical, not only from a pathogenesis perspective but also in considering the effectiveness of therapies and vaccines in the lungs. Here we discuss emerging views on immunologic interactions occurring in the lungs for M. tuberculosis and their impact on infection and persistence.
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Affiliation(s)
- Jordi B Torrelles
- Department of Microbial Infection and Immunity, College of Medicine, and the Center for Microbial Interface Biology, The Ohio State University, Columbus, OH 43210, USA.
| | - Larry S Schlesinger
- Department of Microbial Infection and Immunity, College of Medicine, and the Center for Microbial Interface Biology, The Ohio State University, Columbus, OH 43210, USA.
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27
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Mooney D, Edgar D, Einarsson G, Downey D, Elborn S, Tunney M. Chronic lung disease in common variable immune deficiency (CVID): A pathophysiological role for microbial and non-B cell immune factors. Crit Rev Microbiol 2017; 43:508-519. [PMID: 28068853 DOI: 10.1080/1040841x.2016.1268568] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
One of the most common and most severe forms of primary antibody deficiency encountered in the clinical setting is a heterogeneous group of syndromes termed common variable immune deficiency (CVID). This disorder is characterized by reduced immunoglobulin production and increased susceptibility to infection, particularly of the respiratory tract. Infection and subsequent immunological/inflammatory processes may contribute to the development of pulmonary complications such as bronchiectasis and interstitial lung disease. Immunoglobulin replacement and/or antibiotic therapy, to prevent infection, are routinely prescribed treatments. However, chronic lung disease, the major cause of morbidity and mortality in this patient cohort, may still progress. This clinical progression suggests that pathogens recalcitrant to currently prescribed treatments and other immunological defects may be contributing to the development of pulmonary disease. This review describes the potential role of microbiological and non-B cell immunological factors, including T-cells, neutrophils, complement, toll like receptors, and antimicrobial peptides, in the pathogenicity of chronic lung disease in patients with CVID.
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Affiliation(s)
- Denver Mooney
- a Halo Research Group, Queen's University Belfast , Belfast , United Kingdom
- b Centre for Experimental Medicine, School of Medicine , Dentistry and Biomedical Sciences. Queen's University Belfast , Belfast , United Kingdom
| | - David Edgar
- c T he Royal Hospitals, Belfast Health and Social Care Trust , Regional Immunology Service , Belfast , United Kingdom
| | - Gisli Einarsson
- a Halo Research Group, Queen's University Belfast , Belfast , United Kingdom
- b Centre for Experimental Medicine, School of Medicine , Dentistry and Biomedical Sciences. Queen's University Belfast , Belfast , United Kingdom
| | - Damian Downey
- d Belfast City Hospital, Belfast Health and Social Care Trust , Regional Respiratory Centre , Belfast , United Kingdom
| | - Stuart Elborn
- a Halo Research Group, Queen's University Belfast , Belfast , United Kingdom
- b Centre for Experimental Medicine, School of Medicine , Dentistry and Biomedical Sciences. Queen's University Belfast , Belfast , United Kingdom
| | - Michael Tunney
- a Halo Research Group, Queen's University Belfast , Belfast , United Kingdom
- e School of Pharmacy , Queen's University Belfast , Belfast , United Kingdom
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28
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Hwang I, Mori K, Ohtani K, Matsuda Y, Roy N, Kim Y, Suzuki Y, Wakamiya N. Collectin Kidney 1 Plays an Important Role in Innate Immunity against Streptococcus pneumoniae Infection. J Innate Immun 2017; 9:217-228. [PMID: 28068663 DOI: 10.1159/000453316] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 11/08/2016] [Indexed: 01/07/2023] Open
Abstract
Collectins are C-type lectins that are involved in innate immunity as pattern recognition molecules. Recently, collectin kidney 1 (CL-K1) has been discovered, and in vitro studies have shown that CL-K1 binds to microbes and activates the lectin complement pathway. However, in vivo functions of CL-K1 against microbes have not been elucidated. To investigate the biological functions of CL-K1, we generated CL-K1 knockout (CL-K1-/-) mice and then performed a Streptococcus pneumoniae infection analysis. First, we found that recombinant human CL-K1 bound to S. pneumoniae in a calcium-dependent manner, and induced complement activation. CL-K1-/- mice sera formed less C3 deposition on S. pneumoniae. Furthermore, immunofluorescence analysis in the wild-type (WT) mice demonstrated that CL-K1 and C3 were localized on S. pneumoniae in infected lungs. CL-K1-/- mice revealed decreased phagocytosis of S. pneumoniae. Consequently, less S. pneumoniae clearance was observed in their lungs. CL-K1-/- mice showed severe pulmonary inflammation and weight loss in comparison with WT mice. Finally, the decreased clearance and severe pulmonary inflammation caused by S. pneumoniae infection might cause higher CL-K1-/- mice lethality. Our results suggest that CL-K1 might play an important role in host protection against S. pneumoniae infection through the activation of the lectin complement pathway.
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Affiliation(s)
- Insu Hwang
- Department of Microbiology and Immunochemistry, Asahikawa Medical University, Asahikawa, Japan
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29
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Parainfluenza virus 5 upregulates CD55 expression to produce virions with enhanced resistance to complement-mediated neutralization. Virology 2016; 497:305-313. [PMID: 27505156 DOI: 10.1016/j.virol.2016.07.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 11/22/2022]
Abstract
Many enveloped RNA viruses recruit host cell proteins during assembly as a mechanism to limit antiviral effects of complement. Using viruses which incorporated CD46 alone, CD55 alone or both CD46 and CD55, we addressed the role of these two host cell regulators in limiting complement-mediated neutralization of Parainfluenza virus 5 (PIV5). PIV5 incorporated functional forms of both CD55 and CD46 into virions. PIV5 containing CD55 was highly resistant to complement-mediated neutralization, whereas CD46-containing PIV5 was as sensitive to neutralization as virus lacking both regulators. PIV5 infected cells had increased levels of cell surface CD55, which was further upregulated by exogenous treatment with tumor necrosis factor alpha. PIV5 derived from cells with higher CD55 levels was more resistant to complement-mediated neutralization in vitro than virus from control cells. We propose a role for virus induction of host cell complement inhibitors in defining virus growth and tissue tropism.
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30
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Larkin PB, Muchowski PJ. Genetic Deficiency of Complement Component 3 Does Not Alter Disease Progression in a Mouse Model of Huntington's Disease. J Huntingtons Dis 2016; 1:107-18. [PMID: 23097680 DOI: 10.3233/jhd-2012-120021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Several genes and proteins of the complement cascade are present at elevated levels in brains of patients with Huntington's disease (HD). The complement cascade is well characterized as an effector arm of the immune system, and in the brain it is important for developmental synapse elimination. We hypothesized that increased levels of complement in HD brains contributes to disease progression, perhaps by contributing to synapse elimination or inflammatory signaling. We tested this hypothesis in the R6/2 mouse model of HD by crossing mice deficient in complement component 3 (C3), a crucial complement protein found at increased levels in HD brains, to R6/2 mice and monitoring behavioral and neuropathological disease progression. We found no alterations in multiple behavioral assays, weight or survival in R6/2 mice lacking C3. We also quantified the expression of several complement cascade genes in R6/2 brains and found that the large scale upregulation of complement genes observed in HD brains is not mirrored in R6/2 brains. These data show that C3 deficiency does not alter disease progression in the R6/2 mouse model of HD.
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Affiliation(s)
- Paul B Larkin
- Gladstone Institute of Neurological Disease, University of California, San Francisco, CA, USA
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Miyamae Y, Mochizuki S, Shimoda M, Ohara K, Abe H, Yamashita S, Kazuno S, Ohtsuka T, Ochiai H, Kitagawa Y, Okada Y. ADAM28 is expressed by epithelial cells in human normal tissues and protects from C1q-induced cell death. FEBS J 2016; 283:1574-94. [PMID: 26918856 DOI: 10.1111/febs.13693] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/05/2016] [Accepted: 02/23/2016] [Indexed: 12/28/2022]
Abstract
ADAM28 (disintegrin and metalloproteinase 28), which was originally reported to be lymphocyte-specific, is over-expressed by carcinoma cells and plays a key role in cell proliferation and progression in human lung and breast carcinomas. We studied ADAM28 expression in human normal tissues and examined its biological function. By using antibodies specific to ADAM28, ADAM28 was immunolocalized mainly to epithelial cells in several tissues, including epididymis, bronchus and stomach, whereas lymphocytes in lymph nodes and spleen were negligibly immunostained. RT-PCR, immunoblotting and ELISA analyses confirmed the expression in these tissues, and low or negligible expression by lymphocytes was found in the lymph node and spleen. C1q was identified as a candidate ADAM28-binding protein from a human lung cDNA library by yeast two-hybrid system, and specific binding was demonstrated by binding assays, immunoprecipitation and surface plasmon resonance. C1q treatment of normal bronchial epithelial BEAS-2B and NHBE cells, both of which showed low-level expression of ADAM28, caused apoptosis through activation of p38 and caspase-3, and cell death with autophagy through accumulation of LC3-II and autophagosomes, respectively. C1q-induced cell death was attenuated by treatment of the cells with antibodies against the C1q receptor gC1qR/p33 or cC1qR/calreticulin. Treatment of C1q with recombinant ADAM28 prior to addition to culture media reduced C1q-induced cell death, and knockdown of ADAM28 using siRNAs increased cell death. These data demonstrate that ADAM28 is expressed by epithelial cells of several normal organs, and suggest that ADAM28 plays a role in cell survival by suppression of C1q-induced cytotoxicity in bronchial epithelial cells.
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Affiliation(s)
- Yuka Miyamae
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Satsuki Mochizuki
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Masayuki Shimoda
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Kentaro Ohara
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Hitoshi Abe
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Shuji Yamashita
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan
| | - Saiko Kazuno
- Department of Proteomics and Biomolecular Science, Research Support Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takashi Ohtsuka
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Hiroki Ochiai
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Yuko Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Yasunori Okada
- Department of Pathology, Keio University School of Medicine, Tokyo, Japan.,Department of Pathophysiology for Locomotive and Neoplastic Diseases, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Patel PS, Kearney JF. Neonatal exposure to pneumococcal phosphorylcholine modulates the development of house dust mite allergy during adult life. THE JOURNAL OF IMMUNOLOGY 2015; 194:5838-50. [PMID: 25957171 DOI: 10.4049/jimmunol.1500251] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 04/15/2015] [Indexed: 01/16/2023]
Abstract
Currently, ∼20% of the global population suffers from an allergic disorder. Allergies and asthma occur at higher rates in developed and industrialized countries. It is clear that many human atopic diseases are initiated neonatally and herald more severe IgE-mediated disorders, including allergic asthma, which is driven by the priming of Th2 effector T cells. The hygiene hypothesis attempts to link the increased excessively sanitary conditions early in life to a default Th2 response and increasing allergic phenomena. Despite the substantial involvement of IgE Abs in such conditions, little attention has been paid to the effects of early microbial exposure on the B cell repertoire prior to the initiation of these diseases. In this study, we use Ab-binding assays to demonstrate that Streptococcus pneumoniae and house dust mite (HDM) bear similar phosphorylcholine (PC) epitopes. Neonatal C57BL/6 mice immunized with a PC-bearing pneumococcal vaccine expressed increased frequencies of PC-specific B cells in the lungs following sensitizing exposure to HDM as adults. Anti-PC IgM Abs in the lung decreased the interaction of HDM with pulmonary APCs and were affiliated with lowered allergy-associated cell infiltration into the lung, IgE production, development of airway hyperresponsiveness, and Th2 T cell priming. Thus, exposure of neonatal mice to PC-bearing pneumococci significantly reduced the development of HDM-induced allergic disease during adult life. Our findings demonstrate that B cells generated against conserved epitopes expressed by bacteria, encountered early in life, are also protective against the development of allergic disease during adult life.
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Affiliation(s)
- Preeyam S Patel
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - John F Kearney
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294
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Abstract
Monoclonal antibodies (mAb) have been used as targeted treatments against cancer for more than a decade, with mixed results. Research is needed to understand mAb mechanisms of action with the goal of improving the efficacy of currently used mAbs and guiding the design of novel mAbs. While some mAb-induced tumor cell killing is a result of direct effects on tumor cell signaling, mAb opsonization of tumor cells also triggers activation of immune responses due to complement activation and engagement of antibody receptors on immune effector cells. In fact, complement has been shown to play an important role in modulating the anti-tumor activity of many mAb through complement-dependent cytotoxicity, antibody-dependent cytotoxicity, and through indirect effects by modulating the tumor microenvironment. Complement activity can have both agonistic and antagonistic effects on these processes. How the balance of such effects impacts on the clinical efficacy of mAb therapy remains unclear. In this review, we discuss the mAbs currently approved for cancer treatment and examine how complement can impact their efficacy with a focus on how this information might be used to improve the clinical efficacy of mAb treatment.
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Mayer AE, Parks GD. An AGM model for changes in complement during pregnancy: neutralization of influenza virus by serum is diminished in late third trimester. PLoS One 2014; 9:e112749. [PMID: 25409303 PMCID: PMC4237339 DOI: 10.1371/journal.pone.0112749] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 10/14/2014] [Indexed: 12/28/2022] Open
Abstract
Pregnant women in the third trimester are at increased risk of severe influenza disease relative to the general population, though mechanisms behind this are not completely understood. The immune response to influenza infection employs both complement (C') and antibody (Ab). The relative contributions of these components to the anti-viral response are difficult to dissect because most humans have pre-existing influenza-specific Abs. We developed the African green monkey (AGM) as a tractable nonhuman primate model to study changes in systemic innate immunity to influenza during pregnancy. Because the AGMs were influenza-naïve, we were able to examine the role of C' in influenza virus neutralization using serum from non-pregnant animals before and after influenza infection. We determined that serum from naïve AGMs neutralized influenza via C', while post-infection neutralization did not require C', suggesting an Ab-mediated mechanism. The latter mimicked neutralization using human serum. Further, we found that ex vivo neutralization of influenza with both naïve and influenza-immune AGM serum occurred by virus particle aggregation and lysis, with immune serum lysing virus at a much higher rate than naïve serum. We hypothesized that the anti-influenza C' response would diminish late in AGM pregnancy, corresponding with the time when pregnant women suffer increased influenza severity. We found that influenza neutralization capacity is significantly diminished in serum collected late in the third trimester. Strikingly, we found that circulating levels of C3, C3a, and C4 are diminished late in gestation relative to nonpregnant animals, and while neutralization capacity and serum C3a return to normal shortly after parturition, C3 and C4 levels do not. This AGM model system will enable further studies of the role of physiologic and hormonal changes in downregulating C'-mediated anti-viral immunity during pregnancy, and it will permit the identification of therapeutic targets to improve outcomes of influenza virus infection in pregnant women.
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Affiliation(s)
- Anne E. Mayer
- Department of Microbiology and Immunology, Wake Forest School of Medicine, Winston-Salem, NC 27101, United States of America
| | - Griffith D. Parks
- Department of Microbiology and Immunology, Wake Forest School of Medicine, Winston-Salem, NC 27101, United States of America
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A novel factor I activity in Nipah virus inhibits human complement pathways through cleavage of C3b. J Virol 2014; 89:989-98. [PMID: 25355897 DOI: 10.1128/jvi.02427-14] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Complement is an innate immune system that most animal viruses must face during natural infections. Given that replication and dissemination of the highly pathogenic Nipah virus (NiV) include exposure to environments rich in complement factors, we tested the in vitro sensitivity of NiV to complement-mediated neutralization. Here we show that NiV was completely resistant to in vitro neutralization by normal human serum (NHS). Treatment of purified NiV with NHS activated complement pathways, but there was very little C3 deposition on virus particles. In in vitro reconstitution experiments, NiV particles provided time- and dose-dependent factor I-like protease activity capable of cleaving C3b into inactive C3b (iC3b). NiV-dependent inactivation of C3b only occurred with the cofactors factor H and soluble CR1 but not with CD46. Purified NiV particles did not support C4b cleavage. Electron microscopy of purified NiV particles showed immunogold labeling with anti-factor I antibodies. Our results suggest a novel mechanism by which NiV evades the human complement system through a unique factor I-like activity. IMPORTANCE Viruses have evolved mechanisms to limit complement-mediated neutralization, some of which involve hijacking cellular proteins involved in control of inappropriate complement activation. Here we report a previously unknown mechanism whereby NiV provides a novel protease activity capable of in vitro cleavage and inactivation of C3b, a key component of the complement cascade. These data help to explain how an enveloped virus such as NiV can infect and disseminate through body fluids that are rich in complement activity. Disruption of the ability of NiV to recruit complement inhibitors could form the basis for the development of effective therapies and safer vaccines to combat these highly pathogenic emerging viruses.
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Geurtsen J, Fae KC, van den Dobbelsteen GPJM. Importance of (antibody-dependent) complement-mediated serum killing in protection against Bordetella pertussis. Expert Rev Vaccines 2014; 13:1229-40. [PMID: 25081731 DOI: 10.1586/14760584.2014.944901] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pertussis is a highly contagious respiratory disease that is caused by Bordetella pertussis. Despite being vaccine preventable, pertussis rates have been rising steadily over the last decades, even in areas with high vaccine uptake. Recently, experiments with infant baboons indicated that although vaccination with acellular pertussis vaccines prevented disease, no apparent effect was observed on infection and transmission. One explanation may be that current acellular pertussis vaccines do not induce high levels of opsonophagocytic and/or bactericidal activity, implying that engineering of vaccines that promote bacterial killing may improve efficacy. Here, we discuss the importance of complement-mediated killing in vaccine-induced protection against B. pertussis. We first examine how B. pertussis may have evolved different complement evasion strategies. Second, we explore the benefits of opsonophagocytic and/or bactericidal killing in vaccine-induced protection and discuss whether or not inclusion of new opsonophagocytic or bactericidal target antigens in pertussis vaccines may benefit efficacy.
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Affiliation(s)
- Jeroen Geurtsen
- Crucell Holland B.V, one of the Janssen Pharmaceutical Companies of Johnson & Johnson - Bacterial Vaccines Research and Development, PO Box 2048, Archimedesweg 4-6, 2333 CN Leiden, The Netherlands
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Liu K, Mao YF, Zheng J, Peng ZY, Liu WW, Liu Y, Xu WG, Sun XJ, Jiang CL, Jiang L. SC5b-9-induced pulmonary microvascular endothelial hyperpermeability participates in ventilator-induced lung injury. Cell Biochem Biophys 2014; 67:1421-31. [PMID: 23760612 DOI: 10.1007/s12013-013-9675-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Mechanical ventilation with large tidal volumes can increase lung alveolar permeability and initiate inflammatory responses, termed ventilator-induced lung injury (VILI). VILI is characterized by an influx of inflammatory cells, increased pulmonary permeability, and endothelial and epithelial cell death. But the underlying molecular mechanisms that regulate VILI remain unclear. The purpose of this study was to investigate the mechanisms that regulate pulmonary endothelial barrier in an animal model of VILI. These data suggest that SC5b-9, as the production of the complement activation, causes increase in rat pulmonary microvascular permeability by inducing activation of RhoA and subsequent phosphorylation of myosin light chain and contraction of endothelial cells, resulting in gap formation. In general, the complement-mediated increase in pulmonary microvascular permeability may participate in VILI.
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Affiliation(s)
- Kan Liu
- Department of Diving Medicine, Faculty of Nautical Medicine, Second Military Medical University, Shanghai, 200433, China
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Moliva JI, Rajaram MVS, Sidiki S, Sasindran SJ, Guirado E, Pan XJ, Wang SH, Ross P, Lafuse WP, Schlesinger LS, Turner J, Torrelles JB. Molecular composition of the alveolar lining fluid in the aging lung. AGE (DORDRECHT, NETHERLANDS) 2014; 36:9633. [PMID: 24584696 PMCID: PMC4082594 DOI: 10.1007/s11357-014-9633-4] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 02/14/2014] [Indexed: 06/01/2023]
Abstract
As we age, there is an increased risk for the development of pulmonary diseases, including infections, but few studies have considered changes in lung surfactant and components of the innate immune system as contributing factors to the increased susceptibility of the elderly to succumb to infections. We and others have demonstrated that human alveolar lining fluid (ALF) components, such as surfactant protein (SP)-A, SP-D, complement protein C3, and alveolar hydrolases, play a significant innate immune role in controlling microbial infections. However, there is a lack of information regarding the effect of increasing age on the level and function of ALF components in the lung. Here we addressed this gap in knowledge by determining the levels of ALF components in the aging lung that are important in controlling infection. Our findings demonstrate that pro-inflammatory cytokines, surfactant proteins and lipids, and complement components are significantly altered in the aged lung in both mice and humans. Further, we show that the aging lung is a relatively oxidized environment. Our study provides new information on how the pulmonary environment in old age can potentially modify mucosal immune responses, thereby impacting pulmonary infections and other pulmonary diseases in the elderly population.
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Affiliation(s)
- Juan I. Moliva
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
| | - Murugesan V. S. Rajaram
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
- />Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH USA
| | - Sabeen Sidiki
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
| | - Smitha J. Sasindran
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
| | - Evelyn Guirado
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
| | - Xueliang Jeff Pan
- />Center for Biostatistics, The Ohio State University, Columbus, OH USA
| | - Shu-Hua Wang
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
- />Division of Infectious Diseases, Department of Internal Medicine, The Ohio State University, Columbus, OH USA
| | - Patrick Ross
- />Division of Thoracic Surgery, Department of Surgery, The Ohio State University, Columbus, OH USA
| | - William P. Lafuse
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
- />Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH USA
| | - Larry S. Schlesinger
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
- />Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH USA
| | - Joanne Turner
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
- />Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH USA
| | - Jordi B. Torrelles
- />Center for Microbial Interface Biology, The Ohio State University, Columbus, OH USA
- />Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH USA
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Naito M, Taguchi O, Kobayashi T, Takagi T, D'Alessandro-Gabazza CN, Matsushima Y, Boveda-Ruiz D, Gil-Bernabe P, Matsumoto T, Chelakkot-Govindalayathil AL, Toda M, Yasukawa A, Hataji O, Morser J, Takei Y, Gabazza EC. Thrombin-activatable fibrinolysis inhibitor protects against acute lung injury by inhibiting the complement system. Am J Respir Cell Mol Biol 2014; 49:646-53. [PMID: 23721130 DOI: 10.1165/rcmb.2012-0454oc] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Acute lung injury (ALI) is a devastating disease with an overall mortality rate of 30 to 40%. The coagulation/fibrinolysis system is implicated in the pathogenesis of ALI. Thrombin-activatable fibronolysis inhibitor (TAFI) is an important component of the fibrinolysis system. Recent studies have shown that the active form of TAFI can also regulate inflammatory responses by its ability to inhibit complement C3a, C5a, and osteopontin. We hypothesized that TAFI might have a protective role in ALI. To demonstrate this hypothesis, the development of ALI was compared between wild-type (WT) and TAFI-deficient mice. ALI was induced by intratracheal instillation of LPS. Control mice were treated with saline. Animals were killed 24 hours after LPS. The number of inflammatory cells and the concentration of total protein and inflammatory cytokines were significantly increased in bronchoalveolar lavage fluid from LPS-treated, TAFI-deficient mice compared with their WT counterparts. Significantly higher concentrations of C5a were found in bronchoalveolar lavage fluid and plasma in LPS-treated TAFI knockout mice compared with WT mice. Pretreatment with inhaled C5a receptor antagonist blocked the detrimental effects of TAFI deficiency to levels found in WT mice. Our results show that TAFI protects against ALI, at least in part, by inhibiting the complement system.
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Ganguly T, Johnson JB, Kock ND, Parks GD, Deora R. The Bordetella pertussis Bps polysaccharide enhances lung colonization by conferring protection from complement-mediated killing. Cell Microbiol 2014; 16:1105-18. [PMID: 24438122 DOI: 10.1111/cmi.12264] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 12/24/2013] [Accepted: 01/06/2014] [Indexed: 01/01/2023]
Abstract
Bordetella pertussis is a human-restricted Gram-negative bacterial pathogen that causes whooping cough or pertussis. Pertussis is the leading vaccine preventable disease that is resurging in the USA and other parts of the developed world. There is an incomplete understanding of the mechanisms by which B. pertussis evades killing and clearance by the complement system, a first line of host innate immune defence. The present study examined the role of the Bps polysaccharide to resist complement activity in vitro and in the mouse respiratory tract. The isogenic bps mutant strain containing a large non-polar in-frame deletion of the bpsA-D locus was more sensitive to serum and complement mediated killing than the WT strain. As determined by Western blotting, flow cytometry and electron microscopic studies, the heightened sensitivity of the mutant strain was due to enhanced deposition of complement proteins and the formation of membrane attack complex, the end-product of complement activation. Bps was sufficient to confer complement resistance as evidenced by a Bps-expressing Escherichia coli being protected by serum killing. Additionally, Western blotting and flow cytometry assays revealed that Bps inhibited the deposition of complement proteins independent of other B. pertussis factors. The bps mutant strain colonized the lungs of complement-deficient mice at higher levels than that observed in C57Bl/6 mice. These results reveal a previously unknown interaction between Bps and the complement system in controlling B. pertussis colonization of the respiratory tract. These findings also make Bps a potential target for the prevention and therapy of whooping cough.
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Affiliation(s)
- Tridib Ganguly
- Department of Microbiology and Immunology, Medical Center Blvd., Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA
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Desoubeaux G, Jourdan ML, Valera L, Jardin B, Hem S, Caille A, Cormier B, Marchand-Adam S, Bailly É, Diot P, Chandenier J. Proteomic demonstration of the recurrent presence of inter-alpha-inhibitor H4 heavy-chain during aspergillosis induced in an animal model. Int J Med Microbiol 2013; 304:327-38. [PMID: 24360996 DOI: 10.1016/j.ijmm.2013.11.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 11/07/2013] [Accepted: 11/25/2013] [Indexed: 11/30/2022] Open
Abstract
Invasive pulmonary aspergillosis remains a matter of great concern in oncology/haematology, intensive care units and organ transplantation departments. Despite the availability of various diagnostic tools with attractive features, new markers of infection are required for better medical care. We therefore looked for potential pulmonary biomarkers of aspergillosis, by carrying out two-dimensional (2D) gel electrophoresis comparing the proteomes of bronchial-alveolar lavage fluids (BALF) from infected rats and from control rats presenting non-specific inflammation, both immunocompromised. A bioinformatic analysis of the 2D-maps revealed significant differences in the abundance of 20 protein spots (ANOVA P-value<0.01; q-value<0.03; power>0.8). One of these proteins, identified by mass spectrometry, was considered of potential interest: inter-alpha-inhibitor H4 heavy-chain (ITIH4), characterised for the first time in this infectious context. Western blotting confirmed its overabundance in all infected BALF, particularly at early stages of murine aspergillosis. Further investigations were carried on rat serum, and confirmed that ITIH4 levels increased during experimental aspergillosis. Preliminary results in human samples strengthened this trend. To our knowledge, this is the first description of the involvement of ITIH4 in aspergillosis.
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Affiliation(s)
- Guillaume Desoubeaux
- CHU de Tours, Service de Parasitologie - Mycologie - Médecine tropicale, Tours, France; Université François Rabelais, CEPR UMR-INSERM U1100/E.A. 6305, Faculté de Médecine, Tours, France.
| | - Marie-Lise Jourdan
- CHU de Tours, Service d'Hématologie Biologique, Tours, France; Université François Rabelais, INSERM U1069/N2C, Faculté de Médecine, Tours, France
| | - Lionel Valera
- Sysdiag, CNRS UMR 3145 Bio-Rad, Cap Delta, Montpellier, France
| | | | - Sonia Hem
- Plateforme de spectrométrie de masse protéomique - MSPP, Laboratoire de Protéomique Fonctionnelle, INRA UR1199, Montpellier, France
| | - Agnès Caille
- CHU de Tours, Centre d'Investigation Clinique, Tours, France; Université François Rabelais, INSERM 202, Faculté de Médecine, Tours, France
| | - Bénédicte Cormier
- CHU de Tours, Service d'Anatomie et Cytologie Pathologiques, Tours, France
| | - Sylvain Marchand-Adam
- Université François Rabelais, CEPR UMR-INSERM U1100/E.A. 6305, Faculté de Médecine, Tours, France; CHU de Tours, Service de Pneumologie, Tours, France
| | - Éric Bailly
- CHU de Tours, Service de Parasitologie - Mycologie - Médecine tropicale, Tours, France
| | - Patrice Diot
- Université François Rabelais, CEPR UMR-INSERM U1100/E.A. 6305, Faculté de Médecine, Tours, France; CHU de Tours, Service de Pneumologie, Tours, France
| | - Jacques Chandenier
- CHU de Tours, Service de Parasitologie - Mycologie - Médecine tropicale, Tours, France; Université François Rabelais, CEPR UMR-INSERM U1100/E.A. 6305, Faculté de Médecine, Tours, France
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Paramyxovirus activation and inhibition of innate immune responses. J Mol Biol 2013; 425:4872-92. [PMID: 24056173 DOI: 10.1016/j.jmb.2013.09.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/12/2013] [Accepted: 09/12/2013] [Indexed: 12/18/2022]
Abstract
Paramyxoviruses represent a remarkably diverse family of enveloped nonsegmented negative-strand RNA viruses, some of which are the most ubiquitous disease-causing viruses of humans and animals. This review focuses on paramyxovirus activation of innate immune pathways, the mechanisms by which these RNA viruses counteract these pathways, and the innate response to paramyxovirus infection of dendritic cells (DC). Paramyxoviruses are potent activators of extracellular complement pathways, a first line of defense that viruses must face during natural infections. We discuss mechanisms by which these viruses activate and combat complement to delay neutralization. Once cells are infected, virus replication drives type I interferon (IFN) synthesis that has the potential to induce a large number of antiviral genes. Here we describe four approaches by which paramyxoviruses limit IFN induction: by limiting synthesis of IFN-inducing aberrant viral RNAs, through targeted inhibition of RNA sensors, by providing viral decoy substrates for cellular kinase complexes, and through direct blocking of the IFN promoter. In addition, paramyxoviruses have evolved diverse mechanisms to disrupt IFN signaling pathways. We describe three general mechanisms, including targeted proteolysis of signaling factors, sequestering cellular factors, and upregulation of cellular inhibitors. DC are exceptional cells with the capacity to generate adaptive immunity through the coupling of innate immune signals and T cell activation. We discuss the importance of innate responses in DC following paramyxovirus infection and their consequences for the ability to mount and maintain antiviral T cells.
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Chen X, Shan Q, Jiang L, Zhu B, Xi X. Quantitative proteomic analysis by iTRAQ for identification of candidate biomarkers in plasma from acute respiratory distress syndrome patients. Biochem Biophys Res Commun 2013; 441:1-6. [PMID: 24041686 DOI: 10.1016/j.bbrc.2013.09.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 09/05/2013] [Indexed: 01/08/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is a major cause of morbidity and mortality in critical patients. Proteomic analysis of plasma from individuals with ARDS could elucidate new biomarkers for diagnosis and pathophysiology and identify potential ARDS treatment targets. In this study, we recruited 26 patients (15 controls, 11 ARDS). The ARDS group was subdivided into two groups depending on the type of injury: (1) direct lung injury (AD) and (2) indirect lung injury (AI). Using iTRAQ (isobaric tags for relative and absolute quantitation) analysis, we identified 2429 peptides representing 132 plasma proteins. Among these, 16 were differentially expressed in ARDS patients, including 11 overlapping proteins between the AI and AD group and 5 AI-specific proteins. Protein annotation revealed that lipid transport and complement activation were significantly enriched in the biological process category, and lipid transporter, transporter, and serine-type peptidase activities were significantly enriched in the molecular function category. IPA (Ingenuity Pathway Analysis) signaling pathways revealed that the overlapping proteins were involved in a variety of signaling pathways, including those underlying acute phase response; liver X receptor/retinoid X receptor (LXR/RXR) and farnesoid X (FXR)/RXR activation; clathrin-mediated endocytosis; atherosclerosis; interleukin (IL)-12; complement system; and cytokine, nitric oxide, and reactive oxygen species production in macrophages. We present the first proteomic analysis of ARDS plasma using the iTRAQ approach. Our data provide new biomarker candidates and shed light on potential pathological mechanisms underlying ARDS.
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Affiliation(s)
- Xia Chen
- Department of Critical Care Medicine, Fuxing Hospital, Capital Medical University, 20A Fu Xing Men Wai Da Jie, Beijing 100038, PR China
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He Y, Scholes MA, Wiet GJ, Li Q, Clancy C, Tong HH. Complement activation in pediatric patients with recurrent acute otitis media. Int J Pediatr Otorhinolaryngol 2013; 77:911-7. [PMID: 23537925 PMCID: PMC3660544 DOI: 10.1016/j.ijporl.2013.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 01/31/2013] [Accepted: 03/02/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Otitis media (OM) is one of the most common childhood diseases. The relative contribution of complement activation in protection and pathogenesis during OM remains largely unknown. The purpose of this study was to investigate the beneficial and pathogenic contributions of complement activation in the middle ear of pediatric patients with recurrent acute otitis media (rAOM), and therefore to provide a rational approach to prevent sequelae of OM such as hearing loss. METHODS Twenty children undergoing pressure equalization tube placement with or without adenoidectomy for rAOM were enrolled in the study. Bacterial cultures, enzyme-linked immunosorbent assay (ELISA) for complement components and cytokines and western blot for complement activation were performed on middle ear effusion (MEE) and serum samples. The levels of complement C3a, C5a and sC5-b9 in MEEs and serum samples were compared. The levels of these factors were also examined in regards to length of episode. Pearson's correlation coefficients were calculated on variables between C5a and IL-6 or IL-8. Complement gene expression in human middle ear epithelial (HMEE) cells induced by otopathogens was evaluated. Data were analyzed with Student's t test or the Mann-Whitney rank sum test. In all cases, a P value of <0.05 was set as the measure of significance. RESULTS Our data demonstrated that the complement classical/lectin, alternative and terminal pathways were activated in the middle ear of children with rAOM. Increased complement components of C3a, C5a and sC5-b9 in MEEs were detected in patients with the episode lasting more than six weeks. There was a strong correlation between C5a and IL-6 or IL-8 in the MEEs. Additionally, otopathogens induced enhanced gene expression of factor B and C3 in HMEE cells, which is beneficial for host defense against invading pathogens. CONCLUSION Our studies provided important new insights on how complement activation contributes to inflammatory process during rAOM. Knowledge of the activity of the complement pathway in patients with rAOM may stimulate the development of new strategies to prevent middle ear inflammatory tissue destruction by directing treatment to specific pathways within the complement cascade.
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Affiliation(s)
- Yujuan He
- Department of Otolaryngology, College of Medicine and Public Health, The Ohio State University, Columbus, OH 43210, USA
- Department of Clinical Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Melissa A. Scholes
- Department of Otolaryngology, Nationwide Children’s Hospital, Columbus, OH
| | - Gregory J. Wiet
- Department of Otolaryngology, College of Medicine and Public Health, The Ohio State University, Columbus, OH 43210, USA
- Department of Otolaryngology, Nationwide Children’s Hospital, Columbus, OH
| | - Qian Li
- Department of Otolaryngology, College of Medicine and Public Health, The Ohio State University, Columbus, OH 43210, USA
- Department of Infectious Diseases, FuDan University affiliated Hua Shan Hospital, Shanghai, China
| | - Caitlin Clancy
- Department of Otolaryngology, College of Medicine and Public Health, The Ohio State University, Columbus, OH 43210, USA
| | - Hua Hua Tong
- Department of Otolaryngology, College of Medicine and Public Health, The Ohio State University, Columbus, OH 43210, USA
- Corresponding author Mailing address: The Ohio State University, Department of Otolaryngology-Head and Neck Surgery, 4024 Cramblett Hall, Columbus, OH 43210, Phone: 614-293-8103, Fax: 614-293-5506,
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Foster MW, Thompson JW, Que LG, Yang IV, Schwartz DA, Moseley MA, Marshall HE. Proteomic analysis of human bronchoalveolar lavage fluid after subsgemental exposure. J Proteome Res 2013; 12:2194-205. [PMID: 23550723 DOI: 10.1021/pr400066g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The analysis of airway fluid, as sampled by bronchoalveolar lavage (BAL), provides a minimally invasive route to interrogate lung biology in health and disease. Here, we used immunodepletion, coupled with gel- and label-free LC-MS/MS, for quantitation of the BAL fluid (BALF) proteome in samples recovered from human subjects following bronchoscopic instillation of saline, lipopolysaccharide (LPS) or house dust mite antigen into three distinct lung subsegments. Among more than 200 unique proteins quantified across nine samples, neutrophil granule-derived and acute phase proteins were most highly enriched in the LPS-exposed lobes. Of these, peptidoglycan response protein 1 was validated and confirmed as a novel marker of neutrophilic inflammation. Compared to a prior transcriptomic analysis of airway cells in this same cohort, the BALF proteome revealed a novel set of response factors. Independent of exposure, the enrichment of tracheal-expressed proteins in right lower lung lobes suggests a potential for constitutive intralobar variability in the BALF proteome; sampling of multiple lung subsegments also appears to aid in the identification of protein signatures that differentiate individuals at baseline. Collectively, this proof-of-concept study validates a robust workflow for BALF proteomics and demonstrates the complementary nature of proteomic and genomic techniques for investigating airway (patho)physiology.
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Affiliation(s)
- Matthew W Foster
- Division of Pulmonary, Allergy and Critical Care Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA.
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Jayachandran R, Scherr N, Pieters J. Elimination of intracellularly residing Mycobacterium tuberculosis through targeting of host and bacterial signaling mechanisms. Expert Rev Anti Infect Ther 2013; 10:1007-22. [PMID: 23106276 DOI: 10.1586/eri.12.95] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
With more than 2 billion latently infected people, TB continues to represent a serious threat to human health. According to the WHO, 1.1 million people died from TB in 2010, which is equal to approximately 3000 deaths per day. The causative agent of the disease, Mycobacterium tuberculosis, is a highly successful pathogen having evolved remarkable strategies to persist within the host. Although normally, upon phagocytosis by macrophages, bacteria are readily eliminated by lysosomes, pathogenic mycobacteria actively prevent destruction within macrophages. The strategies that pathogenic mycobacteria apply range from releasing virulence factors to manipulating host molecules resulting in the modulation of host signal transduction pathways in order to sustain their viability within the infected host. Here, we analyze the current status of how a better understanding of both the bacterial and host factors involved in virulence can be used to develop drugs that may be helpful to curb the TB epidemic.
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Affiliation(s)
- Rajesh Jayachandran
- Biozentrum, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland
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Lilja-Maula LIO, Palviainen MJ, Heikkilä HP, Raekallio MR, Rajamäki MM. Proteomic analysis of bronchoalveolar lavage fluid samples obtained from West Highland White Terriers with idiopathic pulmonary fibrosis, dogs with chronic bronchitis, and healthy dogs. Am J Vet Res 2013; 74:148-54. [DOI: 10.2460/ajvr.74.1.148] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wickramaarachchi WDN, Wan Q, Lee Y, Lim BS, De Zoysa M, Oh MJ, Jung SJ, Kim HC, Whang I, Lee J. Genomic characterization and expression analysis of complement component 9 in rock bream (Oplegnathus fasciatus). FISH & SHELLFISH IMMUNOLOGY 2012; 33:707-717. [PMID: 22796422 DOI: 10.1016/j.fsi.2012.06.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 05/29/2012] [Accepted: 06/15/2012] [Indexed: 06/01/2023]
Abstract
The complement component 9 (C9) is a single-chain glycoprotein that mediates formation of the membrane attack complex (MAC) on the surface of target cells. Full-length C9 sequence was identified from a cDNA library of rock bream (Oplegnathus fasciatus), and its genomic sequence was obtained by screening and sequencing of a bacterial artificial chromosome (BAC) genomic DNA library of rock bream. The rock bream complement component 9 (Rb-C9) gene contains 11 exons and 10 introns and is composed of a 1782 bp complete open reading frame (ORF) that encodes a polypeptide of 593 amino acids. Sequence analysis revealed that the Rb-C9 protein contains two thrombospondin type-1domains, a low-density lipoprotein receptor domain class A, a membrane attack complex & perforin (MACPF) domain, and an epidermal growth factor (EGF)-like domain. Important putative transcription factor binding sites, including those for NF-κB, SP-1, C/EBP, AP-1 and OCT-1, were found in the 5' flanking region. Phylogenetic analysis revealed a close proximity of Rb-C9 with the orthologues in puffer fish, and Japanese flounder. Quantitative real-time RT-PCR analysis confirmed that Rb-C9 was constitutively expressed in all the examined tissues isolated from healthy rock bream, with highest expression occurring in liver. Pathogen challenge, including Edwardsiella tarda, Streptococcus iniae, lipopolysaccharide endotoxin and rock bream iridovirus led to up-regulation of Rb-C9 in liver but no change in peripheral blood cells. The observed response to bacterial and viral challenges and high degree of evolutionary relationship to respective orthologues, confirmed that Rb-C9 is an important immune gene, likely involved in the complement system lytic pathway of rock bream.
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Virion-associated complement regulator CD55 is more potent than CD46 in mediating resistance of mumps virus and vesicular stomatitis virus to neutralization. J Virol 2012; 86:9929-40. [PMID: 22761385 DOI: 10.1128/jvi.01154-12] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Enveloped viruses can incorporate host cell membrane proteins during the budding process. Here we demonstrate that mumps virus (MuV) and vesicular stomatitis virus (VSV) assemble to include CD46 and CD55, two host cell regulators which inhibit propagation of complement pathways through distinct mechanisms. Using viruses which incorporated CD46 alone, CD55 alone, or both CD46 and CD55, we have tested the relative contribution of these regulators in resistance to complement-mediated neutralization. Virion-associated CD46 and CD55 were biologically active, with VSV showing higher levels of activity of both cofactors, which promoted factor I-mediated cleavage of C3b into iC3b as well as decay-accelerating factor (DAF) activity against the C3 convertase, than MuV. Time courses of in vitro neutralization with normal human serum (NHS) showed that both regulators could delay neutralization, but viruses containing CD46 alone were neutralized faster and more completely than viruses containing CD55 alone. A dominant inhibitory role for CD55 was most evident for VSV, where virus containing CD55 alone was not substantially different in neutralization kinetics from virus harboring both regulators. Electron microscopy showed that VSV neutralization proceeded through virion aggregation followed by lysis, with virion-associated CD55 providing a delay in both aggregation and lysis more substantial than that conferred by CD46. Our results demonstrate the functional significance of incorporation of host cell factors during virion envelope assembly. They also define pathways of virus complement-mediated neutralization and suggest the design of more effective viral vectors.
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DIGE enables the detection of a putative serum biomarker of fungal origin in a mouse model of invasive aspergillosis. J Proteomics 2012; 75:2536-49. [DOI: 10.1016/j.jprot.2012.01.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 01/27/2012] [Accepted: 01/30/2012] [Indexed: 11/20/2022]
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