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Poteete O, Cox P, Ruffin F, Sutton G, Brinkac L, Clarke TH, Fouts DE, Fowler VG, Thaden JT. Serum susceptibility of Escherichia coli and its association with patient clinical outcomes. PLoS One 2024; 19:e0307968. [PMID: 39074102 DOI: 10.1371/journal.pone.0307968] [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: 03/15/2024] [Accepted: 07/14/2024] [Indexed: 07/31/2024] Open
Abstract
The innate immune system eliminates bloodstream pathogens such as Escherichia coli in part through complement protein deposition and subsequent bacterial death (i.e., "serum killing"). Some E. coli strains have developed mechanisms to resist serum killing, though the extent of variation in serum killing among bloodstream infection (BSI) isolates and the clinical impact of this variation is not well understood. To address this issue, we developed a novel assay that uses flow cytometry to perform high throughput serum bactericidal assays (SBAs) with E. coli BSI isolates (n = 183) to define the proportion of surviving bacteria after exposure to serum. We further determined whether E. coli resistance to serum killing is associated with clinical outcomes (e.g., in-hospital attributable mortality, in-hospital total mortality, septic shock) and bacterial genotype in the corresponding patients with E. coli BSI. Our novel flow cytometry-based SBA performed similarly to a traditional SBA, though with significantly decreased hands-on bench work. Among E. coli BSI isolates, the mean proportion that survived exposure to 25% serum was 0.68 (Standard deviation 0.02, range 0.57-0.93). We did not identify associations between E. coli resistance to serum killing and clinical outcomes in our adjusted models. Together, this study describes a novel flow cytometry-based approach to the bacterial SBA that allowed for high-throughput testing of E. coli BSI isolates and identified high variability in resistance to serum killing among a large set of BSI isolates.
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Affiliation(s)
- Orianna Poteete
- Department of Medicine, Division of Infectious Diseases, Duke University School of Medicine, Durham, NC, United States of America
| | - Phillip Cox
- Department of Medicine, Division of Infectious Diseases, Duke University School of Medicine, Durham, NC, United States of America
| | - Felicia Ruffin
- Department of Medicine, Division of Infectious Diseases, Duke University School of Medicine, Durham, NC, United States of America
| | - Granger Sutton
- J. Craig Venter Institute, Rockville, MD, United States of America
| | - Lauren Brinkac
- J. Craig Venter Institute, Rockville, MD, United States of America
| | - Thomas H Clarke
- J. Craig Venter Institute, Rockville, MD, United States of America
| | - Derrick E Fouts
- J. Craig Venter Institute, Rockville, MD, United States of America
| | - Vance G Fowler
- Department of Medicine, Division of Infectious Diseases, Duke University School of Medicine, Durham, NC, United States of America
- Duke Clinical Research Institute, Durham, NC, United States of America
| | - Joshua T Thaden
- Department of Medicine, Division of Infectious Diseases, Duke University School of Medicine, Durham, NC, United States of America
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2
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Libby P, Smith R, Rubin EJ, Glassberg MK, Farkouh ME, Rosenson RS. Inflammation unites diverse acute and chronic diseases. Eur J Clin Invest 2024:e14280. [PMID: 39046830 DOI: 10.1111/eci.14280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 06/10/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND Inflammation and immunity contribute pivotally to diverse acute and chronic diseases. Inflammatory pathways have become increasingly targets for therapy. Yet, despite substantial similarity in mechanisms and pathways, the scientific, medical, pharma and biotechnology sectors have generally focused programs finely on a single disease entity or organ system. This insularity may impede progress in innovation and the harnessing of powerful new insights into inflammation biology ripe for clinical translation. METHODS A multidisciplinary thinktank reviewed highlights how inflammation contributes to diverse diseases, disturbed homeostasis, ageing and impaired healthspan. We explored how common inflammatory and immune mechanisms that operate in key conditions in their respective domains. This consensus review highlights the high degree of commonality of inflammatory mechanisms in a diverse array of conditions that together contribute a major part of the global burden of morbidity and mortality and present an enormous challenge to public health and drain on resources. RESULTS We demonstrate how that shared inflammatory mechanisms unite many seemingly disparate diseases, both acute and chronic. The examples of infection, cardiovascular conditions, pulmonary diseases, rheumatological disorders, dementia, cancer and ageing illustrate the overlapping pathogenesis. We outline opportunities to synergize, reduce duplication and consolidate efforts of the clinical, research and pharmaceutical communities. Enhanced recognition of these commonalties should promote cross-fertilization and hasten progress in this rapidly moving domain. CONCLUSIONS Greater appreciation of the shared mechanisms should simplify understanding seemingly disparate diseases for clinicians and help them to recognize inflammation as a therapeutic target which the development of novel therapies is rendering actionable.
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Affiliation(s)
- Peter Libby
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Eric J Rubin
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
| | | | - Michael E Farkouh
- Division of Cardiology, University Health Network, Toronto, Ontario, Canada
- Peter Munk Centre of Excellence in Multinational Clinical Trials, University Health Network, Toronto, Ontario, Canada
| | - Robert S Rosenson
- Cardiometabolics Unit, Mount Sinai Icahn School of Medicine, Mount Sinai Hospital, New York, New York, USA
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3
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Fang Z, Hu C, Zhou S, Yu L. PIGW-related glycosylphosphatidylinositol deficiency: A case report and literature review. Neurol Sci 2024; 45:2253-2260. [PMID: 38055078 DOI: 10.1007/s10072-023-07225-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/22/2023] [Indexed: 12/07/2023]
Abstract
INTRODUCTION PIGW-related glycosylphosphatidylinositol deficiency is a rare disease that manifests heterogeneous clinical phenotypes. METHODS We describe a patient with PIGW deficiency and summarize the clinical characteristics of the case. In addition, we conducted a literature review of previously reported patients with pathogenic variants of PIGW. RESULTS A Chinese girl presented with refractory epilepsy, severe intellectual disability, recurrent respiratory infections, and hyperphosphatasia. Seizures worsened during fever and infections, making her more susceptible to epileptic status. She was found to carry a heterozygous variant of PIGW and a deletion of chromosome 17q12 containing PIGW. Only six patients with homozygous or compound heterozygous pathogenic variants of PIGW have been identified in the literature thus far. Epileptic seizures were reported in all patients, and the most common types of seizures were epileptic spasms. Distinctive facial and physical features and recurrent respiratory infections are common in these patients with developmental delays. Serum alkaline phosphatase (ALP) levels were elevated in four of the six patients. CONCLUSIONS PIGW-related glycosylphosphatidylinositol deficiency is characterized by developmental delay, epilepsy, distinctive facial features, and multiple organ anomalies. Genetic testing is an important method for diagnosing this disease, and flow cytometry and serum ALP level detection are crucial complements for genetic testing.
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Affiliation(s)
- Zhixu Fang
- Department of Neurology, National Children's Medical Center, Children's Hospital of Fudan University, No. 399, Wanyuan Road, Minhang District, Shanghai, 201102, China
| | - Chaoping Hu
- Department of Neurology, National Children's Medical Center, Children's Hospital of Fudan University, No. 399, Wanyuan Road, Minhang District, Shanghai, 201102, China
| | - Shuizhen Zhou
- Department of Neurology, National Children's Medical Center, Children's Hospital of Fudan University, No. 399, Wanyuan Road, Minhang District, Shanghai, 201102, China
| | - Lifei Yu
- Department of Neurology, National Children's Medical Center, Children's Hospital of Fudan University, No. 399, Wanyuan Road, Minhang District, Shanghai, 201102, China.
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4
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Casanova JL, Peel J, Donadieu J, Neehus AL, Puel A, Bastard P. The ouroboros of autoimmunity. Nat Immunol 2024; 25:743-754. [PMID: 38698239 DOI: 10.1038/s41590-024-01815-y] [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: 01/15/2024] [Accepted: 03/13/2024] [Indexed: 05/05/2024]
Abstract
Human autoimmunity against elements conferring protective immunity can be symbolized by the 'ouroboros', a snake eating its own tail. Underlying infection is autoimmunity against three immunological targets: neutrophils, complement and cytokines. Autoantibodies against neutrophils can cause peripheral neutropenia underlying mild pyogenic bacterial infections. The pathogenic contribution of autoantibodies against molecules of the complement system is often unclear, but autoantibodies specific for C3 convertase can enhance its activity, lowering complement levels and underlying severe bacterial infections. Autoantibodies neutralizing granulocyte-macrophage colony-stimulating factor impair alveolar macrophages, thereby underlying pulmonary proteinosis and airborne infections, type I interferon viral diseases, type II interferon intra-macrophagic infections, interleukin-6 pyogenic bacterial diseases and interleukin-17A/F mucocutaneous candidiasis. Each of these five cytokine autoantibodies underlies a specific range of infectious diseases, phenocopying infections that occur in patients with the corresponding inborn errors. In this Review, we analyze this ouroboros of immunity against immunity and posit that it should be considered as a factor in patients with unexplained infection.
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Affiliation(s)
- Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, New York, NY, USA.
- Howard Hughes Medical Institute, New York, NY, USA.
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM, Necker Hospital for Sick Children, Paris, France.
- Paris Cité University, Imagine Institute, Paris, France.
- Pediatric Hematology-Immunology and Rheumatology Unit, Necker Hospital for Sick Children, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.
| | - Jessica Peel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, New York, NY, USA
| | - Jean Donadieu
- Trousseau Hospital for Sick Children, Centre de référence des neutropénies chroniques, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Anna-Lena Neehus
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM, Necker Hospital for Sick Children, Paris, France
- Paris Cité University, Imagine Institute, Paris, France
| | - Anne Puel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM, Necker Hospital for Sick Children, Paris, France
- Paris Cité University, Imagine Institute, Paris, France
| | - Paul Bastard
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM, Necker Hospital for Sick Children, Paris, France
- Paris Cité University, Imagine Institute, Paris, France
- Pediatric Hematology-Immunology and Rheumatology Unit, Necker Hospital for Sick Children, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
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5
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Mastellos DC, Hajishengallis G, Lambris JD. A guide to complement biology, pathology and therapeutic opportunity. Nat Rev Immunol 2024; 24:118-141. [PMID: 37670180 DOI: 10.1038/s41577-023-00926-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/20/2023] [Indexed: 09/07/2023]
Abstract
Complement has long been considered a key innate immune effector system that mediates host defence and tissue homeostasis. Yet, growing evidence has illuminated a broader involvement of complement in fundamental biological processes extending far beyond its traditional realm in innate immunity. Complement engages in intricate crosstalk with multiple pattern-recognition and signalling pathways both in the extracellular and intracellular space. Besides modulating host-pathogen interactions, this crosstalk guides early developmental processes and distinct cell trajectories, shaping tissue immunometabolic and regenerative programmes in different physiological systems. This Review provides a guide to the system-wide functions of complement. It highlights illustrative paradigm shifts that have reshaped our understanding of complement pathobiology, drawing examples from evolution, development of the central nervous system, tissue regeneration and cancer immunity. Despite its tight spatiotemporal regulation, complement activation can be derailed, fuelling inflammatory tissue pathology. The pervasive contribution of complement to disease pathophysiology has inspired a resurgence of complement therapeutics with major clinical developments, some of which have challenged long-held dogmas. We thus highlight major therapeutic concepts and milestones in clinical complement intervention.
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Affiliation(s)
| | - George Hajishengallis
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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6
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West EE, Woodruff T, Fremeaux-Bacchi V, Kemper C. Complement in human disease: approved and up-and-coming therapeutics. Lancet 2024; 403:392-405. [PMID: 37979593 PMCID: PMC10872502 DOI: 10.1016/s0140-6736(23)01524-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/07/2023] [Accepted: 07/20/2023] [Indexed: 11/20/2023]
Abstract
The complement system is recognised as a protector against blood-borne pathogens and a controller of immune system and tissue homoeostasis. However, dysregulated complement activity is associated with unwanted or non-resolving immune responses and inflammation, which induce or exacerbate the pathogenesis of a broad range of inflammatory and autoimmune diseases. Although the merit of targeting complement clinically has long been acknowledged, the overall complement drug approval rate has been modest. However, the success of the humanised anti-C5 antibody eculizumab in effectively treating paroxysmal nocturnal haemoglobinuria and atypical haemolytic syndrome has revitalised efforts to target complement therapeutically. Increased understanding of complement biology has led to the identification of novel targets for drug development that, in combination with advances in drug discovery and development technologies, has resulted in a surge of interest in bringing new complement therapeutics into clinical use. The rising number of approved drugs still almost exclusively target rare diseases, but the substantial pipeline of up-and-coming treatment options will possibly provide opportunities to also expand the clinical targeting of complement to common diseases.
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Affiliation(s)
- Erin E West
- Complement and Inflammation Research Section, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Trent Woodruff
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Veronique Fremeaux-Bacchi
- Inserm UMRS1138, Centre de Recherche des Cordeliers, Inflammation, Complement, and Cancer Team, Paris, France; Department of Immunology, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Claudia Kemper
- Complement and Inflammation Research Section, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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7
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Witkin AJ, Jaffe GJ, Srivastava SK, Davis JL, Kim JE. Retinal Vasculitis After Intravitreal Pegcetacoplan: Report From the ASRS Research and Safety in Therapeutics (ReST) Committee. JOURNAL OF VITREORETINAL DISEASES 2024; 8:9-20. [PMID: 38223782 PMCID: PMC10786078 DOI: 10.1177/24741264231220224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Purpose: To analyze post-marketing cases of retinal vasculitis after intravitreal pegcetacoplan. Methods: The American Society of Retina Specialists (ASRS) Research and Safety in Therapeutics (ReST) Committee as well as an expert panel performed a retrospective review of cases of retinal vasculitis reported to the ASRS. Clinical and imaging characteristics were reviewed for evidence of retinal vasculitis and analyzed. Results: Fourteen eyes of 13 patients were confirmed to have retinal vasculitis by review of imaging studies. All cases occurred after the first pegcetacoplan injection. Occlusive retinal vasculopathy was confirmed in 11 eyes (79%). Patients presented a median of 10.5 days (range, 8-23 days) after pegcetacoplan injection. All eyes had anterior chamber inflammation, and 12 eyes (86%) had vitritis. Vasculopathy involved retinal veins (100%) more than arteries (73%), and 12 eyes (86%) had retinal hemorrhages. The median visual acuity (VA) was 20/60 (range, 20/30-5/200) at baseline, 20/300 (range, 20/100-no light perception [NLP]) at vasculitis presentation, and 20/200 (range 20/70-NLP) at the last follow-up. Eight eyes (57%) had more than a 3-line decrease in VA, and 6 eyes (43%) had more than a 6-line decrease in VA from baseline to the final follow-up, including 2 eyes that were enucleated. Six eyes (43%) developed signs of anterior segment neovascularization. Conclusions: There is currently no known etiology for vasculitis in this series. Optimum treatment strategies remain unknown. Infectious etiologies should be considered, and corticosteroid treatments may hasten resolution of inflammatory findings. Continued treatment of affected patients with pegcetacoplan should be avoided.
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Affiliation(s)
| | | | | | - Janet L. Davis
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Judy E. Kim
- UT Southwestern Medical Center, Dallas, TX, USA
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8
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Nishimura JI, Kawaguchi T, Ito S, Murai H, Shimono A, Matsuda T, Fukamizu Y, Akiyama H, Hayashi H, Nakano T, Maruyama S. Real-world safety profile of eculizumab in patients with paroxysmal nocturnal hemoglobinuria, atypical hemolytic uremic syndrome, or generalized myasthenia gravis: an integrated analysis of post-marketing surveillance in Japan. Int J Hematol 2023; 118:419-431. [PMID: 37515657 DOI: 10.1007/s12185-023-03630-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/19/2023] [Accepted: 06/20/2023] [Indexed: 07/31/2023]
Abstract
Eculizumab is a C5 inhibitor approved for the treatment of paroxysmal nocturnal hemoglobinuria (PNH), atypical hemolytic uremic syndrome (aHUS), and anti-acetylcholine receptor antibody-positive generalized myasthenia gravis (AChR + gMG) in Japan. We report integrated safety data from post-marketing surveillance in these three indications, focusing on commonly occurring adverse events (AEs) and infection-related AEs. Of 1219 patients registered, 1055 (PNH: 780; aHUS: 192; AChR + gMG: 83) had available safety data. Total eculizumab exposure was 3977.361 patient-years. AEs were reported in 74.03% of patients. AEs with an incidence of ≥ 1.0 per 100 patient-years included hemolysis, headache, nasopharyngitis, renal impairment, anemia, pneumonia, upper respiratory tract inflammation, influenza, condition aggravated, and infection. The incidence of infection-related AEs was 21.30 per 100 patient-years, the most frequent types (≥ 1.0 per 100 patient-years) being nasopharyngitis, pneumonia, influenza, and infection. Meningococcal infections were reported in four patients (0.10 per 100 patient-years). Two patients died from meningococcal sepsis, with a mortality rate of 0.05 per 100 patient-years. This is the largest safety dataset on eculizumab in Japan derived from more than 10 years of clinical experience. No new safety signals were observed and the safety profile of eculizumab was consistent with that in previous clinical trials and international real-world safety analyses.
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Affiliation(s)
- Jun-Ichi Nishimura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan.
| | - Tatsuya Kawaguchi
- Department of Medical Technology, Kumamoto Health Science University, Kumamoto, Japan
| | - Shuichi Ito
- Department of Pediatrics, Graduate School of Medicine, Yokohama City University, Yokohama, Japan
| | - Hiroyuki Murai
- Department of Neurology, International University of Health and Welfare, Narita, Japan
| | | | | | | | | | | | - Takashi Nakano
- Department of Pediatrics, Kawasaki Medical School, Okayama, Japan
| | - Shoichi Maruyama
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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9
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Yanes T, Sullivan A, Barbaro P, Brion K, Hollway G, Peake J, McNaughton P. Evaluation and pilot testing of a multidisciplinary model of care to mainstream genomic testing for paediatric inborn errors of immunity. Eur J Hum Genet 2023; 31:1125-1132. [PMID: 36864115 PMCID: PMC10545723 DOI: 10.1038/s41431-023-01321-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 02/01/2023] [Accepted: 02/13/2023] [Indexed: 03/04/2023] Open
Abstract
Molecular diagnosis of paediatric inborn errors of immunity (IEI) influences management decisions and alters clinical outcomes, through early use of targeted and curative therapies. The increasing demand for genetic services has resulted in growing waitlists and delayed access to vital genomic testing. To address this issue, the Queensland Paediatric Immunology and Allergy Service, Australia, developed and evaluated a mainstreaming model of care to support point-of-care genomic testing for paediatric IEI. Key features of the model of care included a genetic counsellor embedded in the department, state-wide multidisciplinary team meetings, and variant prioritisation meetings to review whole exome sequencing (WES) data. Of the 62 children presented at the MDT, 43 proceeded to WES, of which nine (21%) received a confirmed molecular diagnosis. Changes to treatment and management were reported for all children with a positive result, including curative hematopoietic stem cell transplantation (n = 4). Four children were also referred for further investigations of variants of uncertain significance or additional testing due to ongoing suspicion of genetic cause after negative result. Demonstrating engagement with the model of care, 45% of the patients were from regional areas and on average, 14 healthcare providers attended the state-wide multidisciplinary team meetings. Parents demonstrated understanding of the implications of testing, reported minimal decisional regret post-test, and identified benefits to genomic testing. Overall, our program demonstrated the feasibility of a mainstreaming model of care for paediatric IEI, improved access to genomic testing, facilitated treatment decision-making, and was acceptable to parents and clinicians alike.
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Affiliation(s)
- Tatiane Yanes
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia.
- The Frazer Institute, Dermatology Research Centre, The University of Queensland, Brisbane, QLD, 4102, Australia.
| | - Anna Sullivan
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia
| | - Pasquale Barbaro
- Queensland Paediatric Haematology Service, Queensland Children's Hospital, Brisbane, QLD, 4101, Australia
- Queensland Children's Hospital Laboratory, Pathology Queensland, South Brisbane, QLD, 4101, Australia
| | - Kristian Brion
- Department of Molecular Genetics, Pathology Queensland, Royal Brisbane and Women's Hospital, Brisbane, QLD, 4029, Australia
| | - Georgina Hollway
- Department of Molecular Genetics, Pathology Queensland, Royal Brisbane and Women's Hospital, Brisbane, QLD, 4029, Australia
| | - Jane Peake
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia
- Department of Paediatrics and Child Health, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Peter McNaughton
- Queensland Paediatric Immunology and Allergy Service, Children's Health Queensland, Brisbane, QLD, 4101, Australia
- Department of Paediatrics and Child Health, The University of Queensland, Brisbane, QLD, 4072, Australia
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10
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Balduit A, Bianco AM, Mangogna A, Zicari AM, Leonardi L, Cinicola BL, Capponi M, Tommasini A, Agostinis C, d’Adamo AP, Bulla R. Genetic bases of C7 deficiency: systematic review and report of a novel deletion determining functional hemizygosity. Front Immunol 2023; 14:1192690. [PMID: 37304269 PMCID: PMC10248053 DOI: 10.3389/fimmu.2023.1192690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/15/2023] [Indexed: 06/13/2023] Open
Abstract
Primary complement system (C) deficiencies are rare but notably associated with an increased risk of infections, autoimmunity, or immune disorders. Patients with terminal pathway C-deficiency have a 1,000- to 10,000-fold-higher risk of Neisseria meningitidis infections and should be therefore promptly identified to minimize the likelihood of further infections and to favor vaccination. In this paper, we performed a systematic review about clinical and genetic patterns of C7 deficiency starting from the case of a ten-year old boy infected by Neisseria meningitidis B and with clinical presentation suggestive of reduced C activity. Functional assay via Wieslab ELISA Kit confirmed a reduction in total C activity of the classical (0.6% activity), lectin (0.2% activity) and alternative (0.1% activity) pathways. Western blot analysis revealed the absence of C7 in patient serum. Sanger sequencing of genomic DNA extracted from peripheral blood of the patient allowed the identification of two pathogenetic variants in the C7 gene: the already well-characterized missense mutation G379R and a novel heterozygous deletion of three nucleotides located at the 3'UTR (c.*99_*101delTCT). This mutation resulted in an instability of the mRNA; thus, only the allele containing the missense mutation was expressed, making the proband a functional hemizygote for the expression of the mutated C7 allele.
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Affiliation(s)
- Andrea Balduit
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Anna Monica Bianco
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Alessandro Mangogna
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Anna Maria Zicari
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Lucia Leonardi
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Bianca Laura Cinicola
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Martina Capponi
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Alberto Tommasini
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
- Department of Medical, Surgical and Health Science, University of Trieste, Trieste, Italy
| | - Chiara Agostinis
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Adamo Pio d’Adamo
- Institute for Maternal and Child Health - IRCCS “Burlo Garofolo”, Trieste, Italy
- Department of Medical, Surgical and Health Science, University of Trieste, Trieste, Italy
| | - Roberta Bulla
- Department of Life Sciences, University of Trieste, Trieste, Italy
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11
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Will a hyperactive classical complement pathway exacerbate autoimmune diseases? Clin Exp Rheumatol 2023; 22:103241. [PMID: 36494043 DOI: 10.1016/j.autrev.2022.103241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/20/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
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12
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Schubart A, Flohr S, Junt T, Eder J. Low-molecular weight inhibitors of the alternative complement pathway. Immunol Rev 2023; 313:339-357. [PMID: 36217774 PMCID: PMC10092480 DOI: 10.1111/imr.13143] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Dysregulation of the alternative complement pathway predisposes individuals to a number of diseases. It can either be evoked by genetic alterations in or by stabilizing antibodies to important pathway components and typically leads to severe diseases such as paroxysmal nocturnal hemoglobinuria, atypical hemolytic uremic syndrome, C3 glomerulopathy, and age-related macular degeneration. In addition, the alternative pathway may also be involved in many other diseases where its amplifying function for all complement pathways might play a role. To identify specific alternative pathway inhibitors that qualify as therapeutics for these diseases, drug discovery efforts have focused on the two central proteases of the pathway, factor B and factor D. Although drug discovery has been challenging for a number of reasons, potent and selective low-molecular weight (LMW) oral inhibitors have now been discovered for both proteases and several molecules are in clinical development for multiple complement-mediated diseases. While the clinical development of these inhibitors initially focuses on diseases with systemic and/or peripheral tissue complement activation, the availability of LMW inhibitors may also open up the prospect of inhibiting complement in the central nervous system where its activation may also play an important role in several neurodegenerative diseases.
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Affiliation(s)
- Anna Schubart
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Stefanie Flohr
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Tobias Junt
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Jörg Eder
- Novartis Institutes for BioMedical Research, Basel, Switzerland
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13
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Sharma A, Gupta S, Patil AB, Vijay N. Birth and death in terminal complement pathway. Mol Immunol 2022; 149:174-187. [PMID: 35908437 DOI: 10.1016/j.molimm.2022.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 06/15/2022] [Accepted: 07/18/2022] [Indexed: 10/16/2022]
Abstract
The cytolytic activity of the membrane attack complex (MAC) is pivotal in the complement-mediated elimination of pathogens. Terminal complement pathway (TCP) genes encode the proteins that form the MAC. Although the TCP genes are well conserved within most vertebrate species, the early evolution of the TCP genes is poorly understood. Based on the comparative genomic analysis of the early evolutionary history of the TCP homologs, we evaluated four possible scenarios that could have given rise to the vertebrate TCP. Currently available genomic data support a scheme of complex sequential protein domain gains that may be responsible for the birth of the vertebrate C6 gene. The subsequent duplication and divergence of this vertebrate C6 gene formed the C7, C8α, C8β, and C9 genes. Compared to the widespread conservation of TCP components within vertebrates, we discovered that C9 has disintegrated in the genomes of galliform birds. Publicly available genome and transcriptome sequencing datasets of chicken from Illumina short read, PacBio long read, and Optical mapping technologies support the validity of the genome assembly at the C9 locus. In this study, we have generated a > 120X coverage whole-genome Chromium 10x linked-read sequencing dataset for the chicken and used it to verify the loss of the C9 gene in the chicken. We find multiple CR1 (chicken repeat 1) element insertions within and near the remnant exons of C9 in several galliform bird genomes. The reconstructed chronology of events shows that the CR1 insertions occurred after C9 gene loss in an early galliform ancestor. Loss of C9 in galliform birds, in contrast to conservation in other vertebrates, may have implications for host-pathogen interactions. Our study of C6 gene birth in an early vertebrate ancestor and C9 gene death in galliform birds provides insights into the evolution of the TCP.
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Affiliation(s)
- Ashutosh Sharma
- Computational Evolutionary Genomics Lab, Department of Biological Sciences, IISER Bhopal, Bhauri, Madhya Pradesh, India
| | - Saumya Gupta
- Computational Evolutionary Genomics Lab, Department of Biological Sciences, IISER Bhopal, Bhauri, Madhya Pradesh, India
| | - Ajinkya Bharatraj Patil
- Computational Evolutionary Genomics Lab, Department of Biological Sciences, IISER Bhopal, Bhauri, Madhya Pradesh, India
| | - Nagarjun Vijay
- Computational Evolutionary Genomics Lab, Department of Biological Sciences, IISER Bhopal, Bhauri, Madhya Pradesh, India.
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14
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Raina R, Sethi SK, Dragon-Durey MA, Khooblall A, Sharma D, Khandelwal P, Shapiro R, Boyer O, Yap HK, Bagga A, Licht C. Systematic review of atypical hemolytic uremic syndrome biomarkers. Pediatr Nephrol 2022; 37:1479-1493. [PMID: 35118546 DOI: 10.1007/s00467-022-05451-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND AND OBJECTIVES Observing biomarkers that affect alternative pathway dysregulation components may be effective in obtaining a new and more rapid diagnostic portrayal of atypical hemolytic uremic syndrome. We have conducted a systematic review on the aHUS biomarkers: C3, C5a, C5b-9, factor B, complement factor B, H, and I, CH50, AH50, D-dimer, as well as anti-CFH antibodies. METHODS An exhaustive literature search was conducted for aHUS patient population plasma/serum, collected/reported at the onset of diagnosis. A total of 60 studies were included with the data on 837 aHUS subjects, with at least one biomarker reported. RESULTS The biomarkers C3 [mean (SD): 72.1 (35.0), median: 70.5 vs. reference range: 75-175 mg/dl, n = 752]; CH50 [28.3 (32.1), 24.3 vs. 30-75 U/ml, n = 63]; AH50 [27.6% (30.2%), 10% vs. ≥ 46%, n = 23]; and CFB [13.1 (6.6), 12.4, vs. 15.2-42.3 mg/dl, n = 19] were lower among aHUS subjects as compared with the reference range. The biomarkers including C4 [mean (SD): 20.4 (9.5), median: 20.5 vs. reference range: 14-40 mg/dl, n = 343]; C4d [7.2 (6.5), 4.8 vs. ≤ 9.8 μg/ml, n = 108]; CFH [40.2 (132.3), 24.5 vs. 23.6-43.1 mg/dl, n = 123 subjects]; and CFI [8.05 (5.01), 6.55 mg/dl vs. 4.4-18.1 mg/dl, n = 38] were all observed to be within the reference range among aHUS subjects. The biomarkers C5a [mean (SD): 54.9 (32.9), median: 48.8 vs. reference range: 10.6-26.3 mg/dl, n = 117]; C5b-9 [466.0 (401.4), 317 (186-569.7) vs. ≤ 250 ng/ml, n = 174]; Bb [2.6 (2.1), 1.9 vs. ≤ 1.6 μg/ml, n = 77] and D-dimer [246 (65.05), 246 vs. < 2.2 ng/ml, 2, n = 2 subjects] were higher among patients with aHUS compared with the reference range. CONCLUSION If a comprehensive complement profile were built using our data, aHUS would be identified by low levels of C3, CH50, AH50, and CFB along with increased levels of C5a, C5b-9, Bb, anti-CFH autoantibodies, and D-dimer. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Rupesh Raina
- Akron Nephrology Associates/Cleveland Clinic Akron General Medical Center, Akron, OH, USA. .,Department of Nephrology, Akron Children's Hospital, Akron, OH, USA.
| | - Sidharth K Sethi
- Kidney and Renal Transplant Institute, Medanta, The Medicity Hospital, Gurgaon, Haryana, India
| | | | - Amrit Khooblall
- Akron Nephrology Associates/Cleveland Clinic Akron General Medical Center, Akron, OH, USA.,Department of Nephrology, Akron Children's Hospital, Akron, OH, USA
| | - Divya Sharma
- Department of Medicine, Northeast Ohio Medical University, Rootstown, OH, USA
| | - Priyanka Khandelwal
- Division of Nephrology, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | | | - Olivia Boyer
- Service de Néphrologie Pédiatrique, AP-HP, Centre de Référence de maladies rénales rares de l'enfant et de l'adulte (MARHEA), Hôpital Necker - Enfants Malades, 149 Rue de Sèvres, 75015, Paris, France.,Institut Imagine, Laboratoire des maladies rénales héréditaires, INSERM UMR 1163, Université de Paris, Paris, France
| | - Hui Kim Yap
- Shaw-NKF-NUH Children's Kidney Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, Kent Ridge, Singapore.,Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Arvind Bagga
- Division of Nephrology, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Christoph Licht
- Cell Biology Program, SickKids Research Institute, Toronto, ON, Canada.,Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.,Division of Nephrology, The Hospital for Sick Children, Toronto, ON, Canada
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15
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Estrada CC, Cardona S, Guo Y, Revelo MP, D'Agati VD, Koganti S, Devaraj J, He JC, Heeger PS, Mallipattu SK. Endothelial-specific loss of Krüppel-Like Factor 4 triggers complement-mediated endothelial injury. Kidney Int 2022; 102:58-77. [PMID: 35483525 DOI: 10.1016/j.kint.2022.03.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 03/02/2022] [Accepted: 03/14/2022] [Indexed: 12/20/2022]
Abstract
Thrombotic microangiopathy (TMA) in the kidney represents the most severe manifestation of kidney microvascular endothelial injury. Despite the source of the inciting event, the diverse clinical forms of kidney TMA share dysregulation of endothelial cell transcripts and complement activation. Here, we show that endothelial-specific knockdown of Krüppel-Like Factor 4 (Klf4)ΔEC, an anti-inflammatory and antithrombotic zinc-finger transcription factor, increases the susceptibility to glomerular endothelial injury and microangiopathy in two genetic murine models that included endothelial nitric oxide synthase knockout mice and aged mice (52 weeks), as well as in a pharmacologic model of TMA using Shiga-toxin 2. In all models, Klf4ΔEC mice exhibit increased pro-thrombotic and pro-inflammatory transcripts, as well as increased complement factors C3 and C5b-9 deposition and histologic features consistent with subacute TMA. Interestingly, complement activation in Klf4ΔEC mice was accompanied by reduced expression of a key KLF4 transcriptional target and membrane bound complement regulatory gene, Cd55. To assess a potential mechanism by which KLF4 might regulate CD55 expression, we performed in silico chromatin immunoprecipitation enrichment analysis of the CD55 promotor and found KLF4 binding sites upstream from the CD55 transcription start site. Using patient-derived kidney biopsy specimens, we found glomerular expression of KLF4 and CD55 was reduced in patients with TMA as compared to control biopsies of the unaffected pole of patient kidneys removed due to kidney cancer. Thus, our data support that endothelial Klf4 is necessary for maintenance of a quiescent glomerular endothelial phenotype and its loss increases susceptibility to complement activation and induction of prothrombotic and pro-inflammatory pathways.
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Affiliation(s)
- Chelsea C Estrada
- Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA; Renal Section, Northport Veterans Affairs Medical Center, Northport, New York, USA
| | - Stephanie Cardona
- Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Yiqing Guo
- Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Monica P Revelo
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Vivette D D'Agati
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA
| | - Siva Koganti
- Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Jason Devaraj
- Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - John C He
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Peter S Heeger
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Sandeep K Mallipattu
- Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA; Renal Section, Northport Veterans Affairs Medical Center, Northport, New York, USA.
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16
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Padron GT, Hernandez-Trujillo VP. Autoimmunity in Primary Immunodeficiencies (PID). Clin Rev Allergy Immunol 2022:10.1007/s12016-022-08942-0. [PMID: 35648371 DOI: 10.1007/s12016-022-08942-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2022] [Indexed: 11/25/2022]
Abstract
Primary immunodeficiency (PID) may impact any component of the immune system. The number of PID and immune dysregulation disorders is growing steadily with advancing genetic detection methods. These expansive recognition methods have changed the way we characterize PID. While PID were once characterized by their susceptibility to infection, the increase in genetic analysis has elucidated the intertwined relationship between PID and non-infectious manifestations including autoimmunity. The defects permitting opportunistic infections to take hold may also lead the way to the development of autoimmune disease. In some cases, it is the non-infectious complications that may be the presenting sign of PID autoimmune diseases, such as autoimmune cytopenia, enteropathy, endocrinopathies, and arthritis among others, have been reported in PID. While autoimmunity may occur with any PID, this review will look at certain immunodeficiencies most often associated with autoimmunity, as well as their diagnosis and management strategies.
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Affiliation(s)
- Grace T Padron
- Nicklaus Children's Hospital, Miami, FL, USA.
- Allergy and Immunology Care Center of South Florida, Miami Lakes, FL, USA.
| | - Vivian P Hernandez-Trujillo
- Nicklaus Children's Hospital, Miami, FL, USA
- Allergy and Immunology Care Center of South Florida, Miami Lakes, FL, USA
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17
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Terminal Complement Pathway Deficiency in an Adult Patient with Meningococcal Sepsis. Case Reports Immunol 2022; 2022:9057000. [PMID: 35655932 PMCID: PMC9152416 DOI: 10.1155/2022/9057000] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 04/26/2022] [Indexed: 11/17/2022] Open
Abstract
The complement system is an essential part of our innate immune system. Three enzymatic activation pathways are described, all converging into a common terminal pathway which causes lysis of the target cell. Late complement deficiencies (LCDs) are typically diagnosed in children or adolescents with invasive meningococcal disease (IMD). However, IMD can also be a first manifestation in adulthood and should prompt for the evaluation of the LCD. We report the case of a young adult with IMD who was found to have a LCD, caused by a compound heterozygous mutation in C6. His vaccination status was optimized and prophylactic antibiotic treatment was initiated. By means of this case, we would like to raise awareness of underlying LCD in (young) adults presenting with IMD by N. meningitidis. Screening for complement deficiencies after IMD, followed by genetic testing, can be lifesaving and allows for genetic counselling. In addition, we discuss the diagnosis and treatment of LCD.
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18
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Silberberg E, Filep JG, Ariel A. Weathering the Storm: Harnessing the Resolution of Inflammation to Limit COVID-19 Pathogenesis. Front Immunol 2022; 13:863449. [PMID: 35615359 PMCID: PMC9124752 DOI: 10.3389/fimmu.2022.863449] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/22/2022] [Indexed: 12/13/2022] Open
Abstract
The resolution of inflammation is a temporally and spatially coordinated process that in its innate manifestations, primarily involves neutrophils and macrophages. The shutdown of infection or injury-induced acute inflammation requires termination of neutrophil accumulation within the affected sites, neutrophil demise, and clearance by phagocytes (efferocytosis), such as tissue-resident and monocyte-derived macrophages. This must be followed by macrophage reprogramming from the inflammatory to reparative and consequently resolution-promoting phenotypes and the production of resolution-promoting lipid and protein mediators that limit responses in various cell types and promote tissue repair and return to homeostatic architecture and function. Recent studies suggest that these events, and macrophage reprogramming to pro-resolving phenotypes in particular, are not only important in the acute setting, but might be paramount in limiting chronic inflammation, autoimmunity, and various uncontrolled cytokine-driven pathologies. The SARS-CoV-2 (COVID-19) pandemic has caused a worldwide health and economic crisis. Severe COVID-19 cases that lead to high morbidity are tightly associated with an exuberant cytokine storm that seems to trigger shock-like pathologies, leading to vascular and multiorgan failures. In other cases, the cytokine storm can lead to diffuse alveolar damage that results in acute respiratory distress syndrome (ARDS) and lung failure. Here, we address recent advances on effectors in the resolution of inflammation and discuss how pro-resolution mechanisms with particular emphasis on macrophage reprogramming, might be harnessed to limit the universal COVID-19 health threat.
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Affiliation(s)
- Esther Silberberg
- Department of Biology and Human Biology, University of Haifa, Haifa, Israel
| | - János G. Filep
- Department of Pathology and Cell Biology, University of Montreal, Montreal, QC, Canada
- Research Center, Maisonneuve-Rosemont Hospital, Montreal, QC, Canada
- *Correspondence: Amiram Ariel, ; János G. Filep,
| | - Amiram Ariel
- Department of Biology and Human Biology, University of Haifa, Haifa, Israel
- *Correspondence: Amiram Ariel, ; János G. Filep,
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19
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Laich A, Patel H, Zarantonello A, Sim R, Inal J. C2 by-pass: cross-talk between the complement classical and alternative pathways. Immunobiology 2022; 227:152225. [DOI: 10.1016/j.imbio.2022.152225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/12/2022] [Accepted: 05/03/2022] [Indexed: 11/17/2022]
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20
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Proteomics Analysis in Japanese Medaka Oryzias latipes Exposed to Humic Acid Revealed Suppression of Innate Immunity and Coagulation Proteins. BIOLOGY 2022; 11:biology11050683. [PMID: 35625410 PMCID: PMC9138666 DOI: 10.3390/biology11050683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/21/2022] [Accepted: 04/28/2022] [Indexed: 12/04/2022]
Abstract
Simple Summary Humic acids are one of the main components of the natural organic matter in surface waters that give them brown color. These compounds are known to have positive effects on aquatic animals such as increased growth and stress resistance. At the same time, there is experimental evidence that humic acids, being natural xenobiotics, act as follows: they cause stress responses at the molecular level. Our aim was to study humic acid-related effects on fish by performing the proteomic analysis of the blood plasma from Japanese medaka exposed to humic acid in concentrations that can be found in natural waters. Results of the study showed that most of the plasma proteins in the exposed fish had a lower abundance compared to that of the intact fish; humic acid caused a reduction in circulating levels of complement components, coagulation factors, and their regulators. Abstract Humic acids (HA), one of the major components of dissolved organic matter, can interfere with different metabolic pathways in aquatic animals, causing various biological effects. This study aimed to provide a molecular basis for HA-related responses in fish by analyzing changes in the blood plasma proteome following short-term exposure to environmentally relevant HA concentrations using the Japanese medaka Oryzias latipes Hd-rR strain as a model organism. Proteomics data were obtained by high-performance liquid chromatography with tandem mass spectrometry analysis employing a label-free quantification approach. HA caused dysregulation of proteins involved in various biological processes, including protein folding, signaling, transport, metabolism, regulation, immune response, and coagulation. The majority of the differentially abundant proteins were down-regulated, including those involved in humoral immunity and coagulation. HA caused the decrease of the complement cascade and membrane attack complex proteins abundance, as well as proteins participating in activation and regulation of secondary hemostasis. The most pronounced suppression was observed at the highest tested HA concentration.
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21
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Mastellos DC, Lambris JD. Recent developments in C3-targeted complement therapeutics. Semin Immunol 2022; 60:101645. [PMID: 35915008 DOI: 10.1016/j.smim.2022.101645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Dimitrios C Mastellos
- National Center for Scientific Research "Demokritos", Aghia Paraskevi, Athens, Greece.
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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22
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Leonardi L, La Torre F, Soresina A, Federici S, Cancrini C, Castagnoli R, Cinicola BL, Corrente S, Giardino G, Lougaris V, Volpi S, Marseglia GL, Cardinale F. Inherited defects in the complement system. Pediatr Allergy Immunol 2022; 33 Suppl 27:73-76. [PMID: 35080299 PMCID: PMC9544610 DOI: 10.1111/pai.13635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/28/2021] [Accepted: 08/06/2021] [Indexed: 11/26/2022]
Abstract
The complement system plays an essential role in both innate and adaptive immune responses. Any dysregulation in this system can disturb normal host defense and alter inflammatory response leading to both infections and autoimmune diseases. The complement system can be activated through three different pathways. Inherited complement deficiencies have been described for all complement components and their regulators. Despite being rare diseases, complement deficiencies are often severe, with a frequent onset during childhood. We provide an overview of clinical disorders related to these disorders and describe current diagnostic strategies required for their comprehensive characterization and management.
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Affiliation(s)
- Lucia Leonardi
- Department of Maternal Infantile and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Francesco La Torre
- Department of Pediatrics, Giovanni XXIII Pediatric Hospital, University of Bari, Bari, Italy
| | - Annarosa Soresina
- Unit of Pediatric Immunology, Pediatrics Clinic, University of Brescia, ASST Spedali Civili Brescia, Brescia, Italy
| | - Silvia Federici
- Division of Rheumatology, IRCCS, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Caterina Cancrini
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.,Academic Department of Pediatrics, Immune, and Infectious Diseases Division, Research Unit of Primary Immunodeficiencies, Bambino Gesù, Children's Hospital, IRCCS, Rome, Italy
| | - Riccardo Castagnoli
- Department of Pediatrics, Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Bianca Laura Cinicola
- Department of Maternal Infantile and Urological Sciences, Sapienza University of Rome, Rome, Italy.,Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | | | - Giuliana Giardino
- Pediatric Section, Department of Translational Medical Sciences, Federico II University, Naples, Italy
| | - Vassilios Lougaris
- Department of Clinical and Experimental Sciences, Pediatrics Clinic and Institute for Molecular Medicine A. Nocivelli, University of Brescia and ASST-Spedali Civili di Brescia, Brescia, Italy
| | - Stefano Volpi
- Center for Autoinflammatory Diseases and Immunodeficiency, IRCCS Istituto Giannina Gaslini, Università degli Studi di Genova, Genoa, Italy
| | - Gian Luigi Marseglia
- Department of Pediatrics, Pediatric Clinic, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Fabio Cardinale
- Department of Pediatrics, Giovanni XXIII Pediatric Hospital, University of Bari, Bari, Italy
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23
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Hematopoiesis and innate immunity: an inseparable couple for good and bad times, bound together by an hormetic relationship. Leukemia 2022; 36:23-32. [PMID: 34853440 PMCID: PMC8727304 DOI: 10.1038/s41375-021-01482-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/11/2021] [Accepted: 11/15/2021] [Indexed: 12/13/2022]
Abstract
Hematopoietic and immune cells originate from a common hematopoietic/lymphopoietic stem cell what explains that these different cell types often share the same receptors and respond to similar factors. Moreover, the common goal of both lineages is to ensure tissue homeostasis under steady-state conditions, fight invading pathogens, and promote tissue repair. We will highlight accumulating evidence that innate and adaptive immunity modulate several aspects of hematopoiesis within the hormetic zone in which the biological response to low exposure to potential stressors generally is favorable and benefits hematopoietic stem/progenitor cells (HSPCs). Innate immunity impact on hematopoiesis is pleiotropic and involves both the cellular arm, comprised of innate immunity cells, and the soluble arm, whose major component is the complement cascade (ComC). In addition, several mediators released by innate immunity cells, including inflammatory cytokines and small antimicrobial cationic peptides, affect hematopoiesis. There are intriguing observations that HSPCs and immune cells share several cell-surface pattern-recognition receptors (PRRs), such as Toll-like receptors (TLRs) and cytosol-expressed NOD, NOD-like, and RIG-I-like receptors and thus can be considered "pathogen sensors". In addition, not only lymphocytes but also HSPCs express functional intracellular complement proteins, defined as complosome which poses challenging questions for further investigation of the intracellular ComC-mediated intracrine regulation of hematopoiesis.
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24
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Auler N, Tonner H, Pfeiffer N, Grus FH. Antibody and Protein Profiles in Glaucoma: Screening of Biomarkers and Identification of Signaling Pathways. BIOLOGY 2021; 10:biology10121296. [PMID: 34943212 PMCID: PMC8698915 DOI: 10.3390/biology10121296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/24/2021] [Accepted: 12/03/2021] [Indexed: 12/12/2022]
Abstract
Simple Summary Glaucoma is a chronic eye disease that is one of the leading causes of blindness worldwide. Currently, the only therapeutic option is to lower intraocular pressure. The onset of the disease is often delayed because patients do not notice visual impairment until very late, which is why glaucoma is also known as “the silent thief of sight”. Therefore, early detection and definition of specific markers, the so-called biomarkers, are immensely important. For the methodical implementation, high-throughput methods and omic-based methods came more and more into focus. Thus, interesting targets for possible biomarkers were already suggested by clinical research and basic research, respectively. This review article aims to join the findings of the two disciplines by collecting overlaps as well as differences in various clinical studies and to shed light on promising candidates concerning findings from basic research, facilitating conclusions on possible therapy options. Abstract Glaucoma represents a group of chronic neurodegenerative diseases, constituting the second leading cause of blindness worldwide. To date, chronically elevated intraocular pressure has been identified as the main risk factor and the only treatable symptom. However, there is increasing evidence in the recent literature that IOP-independent molecular mechanisms also play an important role in the progression of the disease. In recent years, it has become increasingly clear that glaucoma has an autoimmune component. The main focus nowadays is elucidating glaucoma pathogenesis, finding early diagnostic options and new therapeutic approaches. This review article summarizes the impact of different antibodies and proteins associated with glaucoma that can be detected for example by microarray and mass spectrometric analyzes, which (i) provide information about expression profiles and associated molecular signaling pathways, (ii) can possibly be used as a diagnostic tool in future and, (iii) can identify possible targets for therapeutic approaches.
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25
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Costagliola G, Cappelli S, Consolini R. Autoimmunity in Primary Immunodeficiency Disorders: An Updated Review on Pathogenic and Clinical Implications. J Clin Med 2021; 10:jcm10204729. [PMID: 34682853 PMCID: PMC8538991 DOI: 10.3390/jcm10204729] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/18/2022] Open
Abstract
During the last years, studies investigating the intriguing association between immunodeficiency and autoimmunity led to the discovery of new monogenic disorders, the improvement in the knowledge of the pathogenesis of autoimmunity, and the introduction of targeted treatments. Autoimmunity is observed with particular frequency in patients with primary antibody deficiencies, such as common variable immunodeficiency (CVID) and selective IgA deficiency, but combined immunodeficiency disorders (CIDs) and disorders of innate immunity have also been associated with autoimmunity. Among CIDs, the highest incidence of autoimmunity is described in patients with autoimmune polyendocrine syndrome 1, LRBA, and CTLA-4 deficiency, and in patients with STAT-related disorders. The pathogenesis of autoimmunity in patients with immunodeficiency is far to be fully elucidated. However, altered germ center reactions, impaired central and peripheral lymphocyte negative selection, uncontrolled lymphocyte proliferation, ineffective cytoskeletal function, innate immune defects, and defective clearance of the infectious agents play an important role. In this paper, we review the main immunodeficiencies associated with autoimmunity, focusing on the pathogenic mechanisms responsible for autoimmunity in each condition and on the therapeutic strategies. Moreover, we provide a diagnostic algorithm for the diagnosis of PIDs in patients with autoimmunity.
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Liu S, Liu F, Wang T, Liu J, Hu C, Sun L, Wang G. Polysaccharides Extracted From Panax Ginseng C.A. Mey Enhance Complement Component 4 Biosynthesis in Human Hepatocytes. Front Pharmacol 2021; 12:734394. [PMID: 34566655 PMCID: PMC8461058 DOI: 10.3389/fphar.2021.734394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 08/30/2021] [Indexed: 11/23/2022] Open
Abstract
Panax ginseng C.A. Mey (ginseng) is a classic medicinal plant which is well known for enhancing immune capacity. Polysaccharides are one of the main active components of ginseng. We isolated water-soluble ginseng polysaccharides (WGP) and analyzed the physicochemical properties of WGP including molecular weight, monosaccharide composition, and structural characteristics. WGP had minimal effect on the growth of hepatocytes. Interestingly, WGP significantly increased the mRNA and protein levels of complement component 4 (C4), one of the core components of the complement system. Promoter reporter gene assays revealed that WGP significantly enhanced activity of the C4 gene promoter. Deletion analyses determined that the E-box1 and Sp1 regions play key roles in WGP-induced C4 transcription. Taken together, our results suggest that WGP promotes C4 biosynthesis through upregulation of transcription. These results provide new explanation for the intrinsic mechanism by which ginseng boosts human immune capacity.
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Affiliation(s)
- Shuang Liu
- National Engineering Laboratory for AIDS Vaccine, Key Laboratory for Molecular Enzymology and Engineering, School of Life Sciences, Jilin University, Changchun, China
| | - Fangbing Liu
- National Engineering Laboratory for AIDS Vaccine, Key Laboratory for Molecular Enzymology and Engineering, School of Life Sciences, Jilin University, Changchun, China
| | - Tingting Wang
- National Engineering Laboratory for AIDS Vaccine, Key Laboratory for Molecular Enzymology and Engineering, School of Life Sciences, Jilin University, Changchun, China
| | - Jianzeng Liu
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Cheng Hu
- National Engineering Laboratory for AIDS Vaccine, Key Laboratory for Molecular Enzymology and Engineering, School of Life Sciences, Jilin University, Changchun, China
| | - Liwei Sun
- Research Center of Traditional Chinese Medicine, The Affiliated Hospital of Changchun University of Chinese Medicine, Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Changchun University of Chinese Medicine, Changchun, China
| | - Guan Wang
- National Engineering Laboratory for AIDS Vaccine, Key Laboratory for Molecular Enzymology and Engineering, School of Life Sciences, Jilin University, Changchun, China
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Frazer-Abel A, Kirschfink M, Prohászka Z. Expanding Horizons in Complement Analysis and Quality Control. Front Immunol 2021; 12:697313. [PMID: 34434189 PMCID: PMC8381195 DOI: 10.3389/fimmu.2021.697313] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 07/19/2021] [Indexed: 01/09/2023] Open
Abstract
Complement not only plays a key role in host microbial defense but also modulates the adaptive immune response through modification of T- and B-cell reactivity. Moreover, a normally functioning complement system participates in hematopoiesis, reproduction, lipid metabolism, and tissue regeneration. Because of its powerful inflammatory potential, multiple regulatory proteins are needed to prevent potential tissue damage. In clinical practice, dysregulation and overactivation of the complement system are major causes of a variety of inflammatory and autoimmune diseases ranging from nephropathies, age-related macular degeneration (AMD), and systemic lupus erythematosus (SLE) to graft rejection, sepsis, and multi-organ failure. The clinical importance is reflected by the recent development of multiple drugs targeting complement with a broad spectrum of indications. The recognition of the role of complement in diverse diseases and the advent of complement therapeutics has increased the number of laboratories and suppliers entering the field. This has highlighted the need for reliable complement testing. The relatively rapid expansion in complement testing has presented challenges for a previously niche field. This is exemplified by the issue of cross-reactivity of complement-directed antibodies and by the challenges of the poor stability of many of the complement analytes. The complex nature of complement testing and increasing clinical demand has been met in the last decade by efforts to improve the standardization among laboratories. Initiated by the IUIS/ICS Committee for the Standardization and Quality Assessment in Complement Measurements 14 rounds of external quality assessment since 2010 resulted in improvements in the consistency of testing across participating institutions, while extending the global reach of the efforts to more than 200 laboratories in 30 countries. Worldwide trends of assay availability, usage, and analytical performance are summarized based on the past years’ experiences. Progress in complement analysis has been facilitated by the quality assessment and standardization efforts that now allow complement testing to provide a comprehensive insight into deficiencies and the activation state of the system. This in turn enables clinicians to better define disease severity, evolution, and response to therapy.
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Affiliation(s)
| | | | - Zoltán Prohászka
- Department of Medicine and Hematology, Research Laboratory Semmelweis University, Budapest, Hungary
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28
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Halting targeted and collateral damage to red blood cells by the complement system. Semin Immunopathol 2021; 43:799-816. [PMID: 34191092 PMCID: PMC8243056 DOI: 10.1007/s00281-021-00859-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 04/18/2021] [Indexed: 12/12/2022]
Abstract
The complement system is an important defense mechanism against pathogens; however, in certain pathologies, the system also attacks human cells, such as red blood cells (RBCs). In paroxysmal nocturnal hemoglobinuria (PNH), RBCs lack certain complement regulators which sensitize them to complement-mediated lysis, while in autoimmune hemolytic anemia (AIHA), antibodies against RBCs may initiate complement-mediated hemolysis. In recent years, complement inhibition has improved treatment prospects for these patients, with eculizumab now the standard of care for PNH patients. Current complement inhibitors are however not sufficient for all patients, and they come with high costs, patient burden, and increased infection risk. This review gives an overview of the underlying pathophysiology of complement-mediated hemolysis in PNH and AIHA, the role of therapeutic complement inhibition nowadays, and the high number of complement inhibitors currently under investigation, as for almost every complement protein, an inhibitor is being developed. The focus lies with novel therapeutics that inhibit complement activity specifically in the pathway that causes pathology or those that reduce costs or patient burden through novel administration routes.
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Willrich MAV, Braun KMP, Moyer AM, Jeffrey DH, Frazer-Abel A. Complement testing in the clinical laboratory. Crit Rev Clin Lab Sci 2021; 58:447-478. [PMID: 33962553 DOI: 10.1080/10408363.2021.1907297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The complement system is the human's first line of defense against microbial pathogens because of its important housekeeping and infection/inflammation roles. It is composed of a series of soluble and cell-bound proteins that are activated in a cascade effect, similar to the coagulation pathways. There are different pattern recognizing molecules that activate the complement system in response to stimuli or threats, acting through three initiation pathways: classical, lectin, and alternative. All three activation pathways converge at the C3 component and share the terminal pathway. The main outputs of the complement system action are lytic killing of microbes, the release of pro-inflammatory anaphylatoxins, and opsonization of targets. Laboratory testing is relevant in the setting of suspected complement deficiencies, as well as in the emerging number of diseases related to dysregulation (over-activation) of complement. Most common assays measure complement lytic activity and the different complement component concentrations. Specialized testing includes the evaluation of autoantibodies against complement components, activation fragments, and genetic studies. In this review, we cover laboratory testing for complement and the conditions with complement involvement, as well as current challenges in the field.
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Affiliation(s)
| | - Karin M P Braun
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Ann M Moyer
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - David H Jeffrey
- Exsera Biolabs, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - Ashley Frazer-Abel
- Exsera Biolabs, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA
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Abstract
PURPOSE OF REVIEW To discuss the crosstalk between the complement system and hemostatic factors (coagulation cascade, platelet, endothelium, and Von Willebrand Factor), and the consequences of this interaction under physiologic and pathologic conditions. RECENT FINDINGS The complement and coagulation systems are comprised of serine proteases and are genetically related. In addition to the common ancestral genes, the complement system and hemostasis interact directly, through protein-protein interactions, and indirectly, on the surface of platelets and endothelial cells. The close interaction between the complement system and hemostatic factors is manifested both in physiologic and pathologic conditions, such as in the inflammatory response to thrombosis, thrombosis at the inflamed area, and thrombotic complications of complement disorders. SUMMARY The interaction between the complement system and hemostasis is vital for homeostasis and the protective response of the host to tissue injury, but also results in the pathogenesis of several thrombotic and inflammatory disorders.
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Pulmonary Manifestations of Immunodeficiency and Immunosuppressive Diseases Other than Human Immunodeficiency Virus. Pediatr Clin North Am 2021; 68:103-130. [PMID: 33228927 DOI: 10.1016/j.pcl.2020.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Immune deficiencies may alter normal lung function and protective mechanisms, resulting in a myriad of pulmonary manifestations. Primary immunodeficiencies involve multiple branches of the immune system, and defects may predispose to recurrent upper and lower respiratory infections by common pathogens; opportunistic infections; and autoimmune, inflammatory, and malignant processes that may result in interstitial pneumonias. Secondary immunodeficiencies may result from neoplasms or their treatment, organ transplant and immunosuppression, and from autoimmune diseases and their treatments. Primary and secondary immunodeficiencies and their pulmonary manifestations may be difficult to diagnose and treat. A multidisciplinary approach to evaluation is essential.
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Hevey R, Pouw RB, Harris C, Ricklin D. Sweet turning bitter: Carbohydrate sensing of complement in host defence and disease. Br J Pharmacol 2020; 178:2802-2822. [PMID: 33140840 DOI: 10.1111/bph.15307] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/20/2020] [Accepted: 10/26/2020] [Indexed: 12/27/2022] Open
Abstract
The complement system plays a major role in threat recognition and in orchestrating responses to microbial intruders and accumulating debris. This immune surveillance is largely driven by lectins that sense carbohydrate signatures on foreign, diseased and healthy host cells and act as complement activators, regulators or receptors to shape appropriate immune responses. While carbohydrate sensing protects our bodies, misguided or impaired recognition can contribute to disease. Moreover, pathogenic microbes have evolved to evade complement by mimicking host signatures. While complement is recognized as a disease factor, we only slowly start to appreciate the role of carbohydrate interactions in the underlying processes. A better understanding of complement's sweet side will contribute to a better description of disease mechanisms and enhanced diagnostic and therapeutic options. This review introduces the key components in complement-mediated carbohydrate sensing, discusses their role in health and disease, and touches on the potential effects of carbohydrate-related disease intervention. LINKED ARTICLES: This article is part of a themed issue on Canonical and non-canonical functions of the complement system in health and disease. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v178.14/issuetoc.
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Affiliation(s)
- Rachel Hevey
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Richard B Pouw
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Claire Harris
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Daniel Ricklin
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
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33
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Krenev IA, Umnyakova ES, Eliseev IE, Dubrovskii YA, Gorbunov NP, Pozolotin VA, Komlev AS, Panteleev PV, Balandin SV, Ovchinnikova TV, Shamova OV, Berlov MN. Antimicrobial Peptide Arenicin-1 Derivative Ar-1-(C/A) as Complement System Modulator. Mar Drugs 2020; 18:md18120631. [PMID: 33321960 PMCID: PMC7764584 DOI: 10.3390/md18120631] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/27/2020] [Accepted: 12/08/2020] [Indexed: 12/25/2022] Open
Abstract
Antimicrobial peptides (AMPs) are not only cytotoxic towards host pathogens or cancer cells but also are able to act as immunomodulators. It was shown that some human and non-human AMPs can interact with complement proteins and thereby modulate complement activity. Thus, AMPs could be considered as the base for complement-targeted therapeutics development. Arenicins from the sea polychaete Arenicola marina, the classical example of peptides with a β-hairpin structure stabilized by a disulfide bond, were shown earlier to be among the most prospective regulators. Here, we investigate the link between arenicins' structure and their antimicrobial, hemolytic and complement-modulating activities using the derivative Ar-1-(C/A) without a disulfide bond. Despite the absence of this bond, the peptide retains all important functional activities and also appears less hemolytic in comparison with the natural forms. These findings could help to investigate new complement drugs for regulation using arenicin derivatives.
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Affiliation(s)
- Ilia A. Krenev
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
- Faculty of Chemistry, Saint Petersburg State University, Universitetskaya Emb, 7/9, 199034 Saint Petersburg, Russia;
| | - Ekaterina S. Umnyakova
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
- Correspondence: ; Tel.: +7-981-971-4975
| | - Igor E. Eliseev
- Nanobiotechnology Laboratory, Alferov University, Khlopin Str. 8/3, 194021 Saint Petersburg, Russia;
| | - Yaroslav A. Dubrovskii
- Faculty of Chemistry, Saint Petersburg State University, Universitetskaya Emb, 7/9, 199034 Saint Petersburg, Russia;
- Almazov National Medical Research Centre, Akkuratov Str, 2, 197341 Saint Petersburg, Russia
| | - Nikolay P. Gorbunov
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
| | - Vladislav A. Pozolotin
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
| | - Alexei S. Komlev
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
| | - Pavel V. Panteleev
- M.M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia; (P.V.P.); (S.V.B.); (T.V.O.)
| | - Sergey V. Balandin
- M.M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia; (P.V.P.); (S.V.B.); (T.V.O.)
| | - Tatiana V. Ovchinnikova
- M.M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Str., 16/10, 117997 Moscow, Russia; (P.V.P.); (S.V.B.); (T.V.O.)
- Department of Biotechnology, I.M. Sechenov First Moscow State Medical University, Trubetskaya Str., 8-2, 119991 Moscow, Russia
| | - Olga V. Shamova
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
| | - Mikhail N. Berlov
- Department of General Pathology and Pathological Physiology, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint Petersburg, Russia; (I.A.K.); (N.P.G.); (V.A.P.); (A.S.K.); (O.V.S.); (M.N.B.)
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de Boer ECW, van Mourik AG, Jongerius I. Therapeutic Lessons to be Learned From the Role of Complement Regulators as Double-Edged Sword in Health and Disease. Front Immunol 2020; 11:578069. [PMID: 33362763 PMCID: PMC7758290 DOI: 10.3389/fimmu.2020.578069] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/12/2020] [Indexed: 12/22/2022] Open
Abstract
The complement system is an important part of the innate immune system, providing a strong defense against pathogens and removing apoptotic cells and immune complexes. Due to its strength, it is important that healthy human cells are protected against damage induced by the complement system. To be protected from complement, each cell type relies on a specific combination of both soluble and membrane-bound regulators. Their importance is indicated by the amount of pathologies associated with abnormalities in these complement regulators. Here, we will discuss the current knowledge on complement regulatory protein polymorphisms and expression levels together with their link to disease. These diseases often result in red blood cell destruction or occur in the eye, kidney or brain, which are tissues known for aberrant complement activity or regulation. In addition, complement regulators have also been associated with different types of cancer, although their mechanisms here have not been elucidated yet. In most of these pathologies, treatments are limited and do not prevent the complement system from attacking host cells, but rather fight the consequences of the complement-mediated damage, using for example blood transfusions in anemic patients. Currently only few drugs targeting the complement system are used in the clinic. With further demand for therapeutics rising linked to the wide range of complement-mediated disease we should broaden our horizon towards treatments that can actually protect the host cells against complement. Here, we will discuss the latest insights on how complement regulators can benefit therapeutics. Such therapeutics are currently being developed extensively, and can be categorized into full-length complement regulators, engineered complement system regulators and antibodies targeting complement regulators. In conclusion, this review provides an overview of the complement regulatory proteins and their links to disease, together with their potential in the development of novel therapeutics.
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Affiliation(s)
- Esther C W de Boer
- Sanquin Research, Department of Immunopathology, and Landsteiner Laboratory, Amsterdam University Medical Centre, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands.,Department of Pediatric Immunology, Rheumatology, and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centre, Amsterdam, Netherlands
| | - Anouk G van Mourik
- Sanquin Research, Department of Immunopathology, and Landsteiner Laboratory, Amsterdam University Medical Centre, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| | - Ilse Jongerius
- Sanquin Research, Department of Immunopathology, and Landsteiner Laboratory, Amsterdam University Medical Centre, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands.,Department of Pediatric Immunology, Rheumatology, and Infectious Diseases, Emma Children's Hospital, Amsterdam University Medical Centre, Amsterdam, Netherlands
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35
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Willems E, Lorés-Motta L, Zanichelli A, Suffritti C, van der Flier M, van der Molen RG, Langereis JD, van Drongelen J, van den Heuvel LP, Volokhina E, van de Kar NC, Keizer-Garritsen J, Levin M, Herberg JA, Martinon-Torres F, Wessels HJ, de Breuk A, Fauser S, Hoyng CB, den Hollander AI, de Groot R, van Gool AJ, Gloerich J, de Jonge MI. Quantitative multiplex profiling of the complement system to diagnose complement-mediated diseases. Clin Transl Immunology 2020; 9:e1225. [PMID: 33318796 PMCID: PMC7724921 DOI: 10.1002/cti2.1225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/16/2020] [Accepted: 11/16/2020] [Indexed: 02/06/2023] Open
Abstract
Objectives Complement deficiencies are difficult to diagnose because of the variability of symptoms and the complexity of the diagnostic process. Here, we applied a novel ‘complementomics’ approach to study the impact of various complement deficiencies on circulating complement levels. Methods Using a quantitative multiplex mass spectrometry assay, we analysed 44 peptides to profile 34 complement proteins simultaneously in 40 healthy controls and 83 individuals with a diagnosed deficiency or a potential pathogenic variant in 14 different complement proteins. Results Apart from confirming near or total absence of the respective protein in plasma of complement‐deficient patients, this mass spectrometry‐based profiling method led to the identification of additional deficiencies. In many cases, partial depletion of the pathway up‐ and/or downstream of the absent protein was measured. This was especially found in patients deficient for complement inhibitors, such as angioedema patients with a C1‐inhibitor deficiency. The added value of complementomics was shown in three patients with poorly defined complement deficiencies. Conclusion Our study shows the potential clinical utility of profiling circulating complement proteins as a comprehensive read‐out of various complement deficiencies. Particularly, our approach provides insight into the intricate interplay between complement proteins due to functional coupling, which contributes to the better understanding of the various disease phenotypes and improvement of care for patients with complement‐mediated diseases.
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Affiliation(s)
- Esther Willems
- Laboratory of Medical Immunology Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands.,Radboud Center for Infectious Diseases Radboud University Medical Center Nijmegen The Netherlands.,Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Laura Lorés-Motta
- Department of Ophthalmology Donders Institute for Brain Cognition and Behaviour Radboud University Medical Center Nijmegen The Netherlands
| | - Andrea Zanichelli
- Department of Biomedical and Clinical Sciences Luigi Sacco ASST Fatebenefratelli Sacco University of Milan Milan Italy
| | - Chiara Suffritti
- Department of Biomedical and Clinical Sciences Luigi Sacco ASST Fatebenefratelli Sacco University of Milan Milan Italy
| | - Michiel van der Flier
- Laboratory of Medical Immunology Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands.,Radboud Center for Infectious Diseases Radboud University Medical Center Nijmegen The Netherlands.,Department of Pediatrics University Medical Center Utrecht Utrecht The Netherlands.,Amalia Children's Hospital Radboud University Medical Center Nijmegen The Netherlands
| | - Renate G van der Molen
- Laboratory of Medical Immunology Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Jeroen D Langereis
- Laboratory of Medical Immunology Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Joris van Drongelen
- Department of Obstetrics and Gynecology Radboud University Medical Center Nijmegen The Netherlands
| | - Lambert P van den Heuvel
- Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands.,Amalia Children's Hospital Radboud University Medical Center Nijmegen The Netherlands
| | - Elena Volokhina
- Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands.,Amalia Children's Hospital Radboud University Medical Center Nijmegen The Netherlands
| | - Nicole Caj van de Kar
- Amalia Children's Hospital Radboud University Medical Center Nijmegen The Netherlands
| | - Jenneke Keizer-Garritsen
- Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Michael Levin
- Department of Medicine Section for Paediatrics Imperial College London London UK
| | - Jethro A Herberg
- Department of Medicine Section for Paediatrics Imperial College London London UK
| | - Federico Martinon-Torres
- Translational Pediatrics and Infectious Diseases Instituto de Investigación Sanitaria de Santiago Hospital Clínico Universitario de Santiago Santiago de Compostela Spain
| | - Hans Jtc Wessels
- Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Anita de Breuk
- Department of Ophthalmology Donders Institute for Brain Cognition and Behaviour Radboud University Medical Center Nijmegen The Netherlands
| | - Sascha Fauser
- Department of Ophthalmology University Hospital Cologne Koln Germany.,F. Hoffmann - La Roche AG Basel Switzerland
| | - Carel B Hoyng
- Department of Ophthalmology Donders Institute for Brain Cognition and Behaviour Radboud University Medical Center Nijmegen The Netherlands
| | - Anneke I den Hollander
- Department of Ophthalmology Donders Institute for Brain Cognition and Behaviour Radboud University Medical Center Nijmegen The Netherlands
| | - Ronald de Groot
- Laboratory of Medical Immunology Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands.,Radboud Center for Infectious Diseases Radboud University Medical Center Nijmegen The Netherlands
| | - Alain J van Gool
- Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Jolein Gloerich
- Translational Metabolic Laboratory Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands
| | - Marien I de Jonge
- Laboratory of Medical Immunology Department of Laboratory Medicine Radboud Institute for Molecular Life Sciences Radboud University Medical Center Nijmegen The Netherlands.,Radboud Center for Infectious Diseases Radboud University Medical Center Nijmegen The Netherlands
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Host genetics and infectious disease: new tools, insights and translational opportunities. Nat Rev Genet 2020; 22:137-153. [PMID: 33277640 PMCID: PMC7716795 DOI: 10.1038/s41576-020-00297-6] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/14/2020] [Indexed: 12/22/2022]
Abstract
Understanding how human genetics influence infectious disease susceptibility offers the opportunity for new insights into pathogenesis, potential drug targets, risk stratification, response to therapy and vaccination. As new infectious diseases continue to emerge, together with growing levels of antimicrobial resistance and an increasing awareness of substantial differences between populations in genetic associations, the need for such work is expanding. In this Review, we illustrate how our understanding of the host–pathogen relationship is advancing through holistic approaches, describing current strategies to investigate the role of host genetic variation in established and emerging infections, including COVID-19, the need for wider application to diverse global populations mirroring the burden of disease, the impact of pathogen and vector genetic diversity and a broad array of immune and inflammation phenotypes that can be mapped as traits in health and disease. Insights from study of inborn errors of immunity and multi-omics profiling together with developments in analytical methods are further advancing our knowledge of this important area. Infectious diseases are an ever-present global threat. In this Review, Kwok, Mentzer and Knight discuss our latest understanding of how human genetics influence susceptibility to disease. Furthermore, they discuss emerging progress in the interplay between host and pathogen genetics, molecular responses to infection and vaccination, and opportunities to bring these aspects together for rapid responses to emerging diseases such as COVID-19.
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37
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Li PH, Wong WW, Leung EN, Lau CS, Au E. Novel pathogenic mutations identified in the first Chinese pedigree of complete C6 deficiency. Clin Transl Immunology 2020; 9:e1148. [PMID: 32670577 PMCID: PMC7343556 DOI: 10.1002/cti2.1148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 01/25/2023] Open
Abstract
Objectives Complete C6 deficiency (C6Q0) is a rare primary immunodeficiency leading to increased susceptibility to recurrent Neisseria infections. Patients with C6Q0 have mostly been reported in individuals of African ancestry previously, but never in Chinese. We identify the first Chinese patients with C6Q0 through family screening of an index case presenting with recurrent Neisseria meningitis with septicaemia and performed extensive clinical, serological and genetic investigations. Methods Two variants in C6 were identified by next‐generation sequencing and confirmed by Sanger sequencing in an index case of C6Q0. Immunological investigations, complement haemolytic assays (CH50/AH50), C6 gene sequencing and quantification of serum C6 levels were performed for all available members of his nonconsanguineous family. Results Three C6Q0 patients were identified with near‐absent C6 levels, absent CH50/AH50 activity and compound heterozygous for two nonsense mutations in the C6 gene: NM_000065.4:c.1786C>T (p.Arg596Ter) and NM_000065.4:c.1816C>T (p.Arg606Ter). Neither mutations have been reported to be pathogenic previously. Two other family members who were heterozygous for either p.Arg596Ter or and p.Arg606Ter had intermediate C6 levels but preserved CH50/AH50 activity. These two loss‐of‐function mutations showed a strong genotype–phenotype correlation in C6 levels. Conclusions We report on two compound heterozygous mutations in C6, p.Arg596Ter and p.Arg606Ter inherited in three patients of the first recorded Chinese pedigree of C6Q0. Neither mutations had been reported to be pathogenic previously. We demonstrate that heterozygous family members with subtotal C6 levels had preserved complement haemolytic function and demonstrate a threshold effect of C6 protein level.
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Affiliation(s)
- Philip H Li
- Division of Rheumatology & Clinical Immunology Department of Medicine Queen Mary Hospital The University of Hong Kong Hong Kong
| | - William Wy Wong
- Division of Clinical Immunology Department of Pathology Queen Mary Hospital Hong Kong
| | - Evelyn Ny Leung
- Division of Clinical Immunology Department of Pathology Queen Mary Hospital Hong Kong
| | - Chak-Sing Lau
- Division of Rheumatology & Clinical Immunology Department of Medicine Queen Mary Hospital The University of Hong Kong Hong Kong
| | - Elaine Au
- Division of Clinical Immunology Department of Pathology Queen Mary Hospital Hong Kong
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Amann K, Daniel C, Büttner-Herold M. [The complement system-a "hot topic" not only for kidney diseases]. DER PATHOLOGE 2020; 41:238-247. [PMID: 32240352 DOI: 10.1007/s00292-020-00773-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Increasing interest in the role of the complement system in systemic and renal disease is based on new pathophysiological and therapeutic insights of the recent past and particularly in genetic analyses in children with atypical hemolytic uremic syndrome (aHUS). aHUS is the prototypical systemic disease associated with excessive activation of the alternative complement pathway and manifests in the kidney, but also in other organs as thrombotic microangiopathy (TMA). Pathomechanisms discovered to induce the overactivation of the alternative complement pathway in aHUS led to the first successful therapeutic application of a C5b9 inhibitor. This suppression of the terminal complement cascade succeeded in inhibiting local tissue damage. Thereafter, thanks to advanced modern technologies, further systemic and renal diseases associated with mutations or auto-antibodies targeting the complement pathway were identified. Hereby, disease onset is frequently associated with an additional trigger, e.g. infection or hormonal alterations/imbalances, against the background of a pre-existing predisposition of the patient.Due to the growing understanding of the regulation, and thus the possibility of therapeutic modulation of the different complement pathways, and due to the increasing availability of a variety of drugs inhibiting the complement system, interest in complement-mediated systemic and renal disease has been steadily increasing, making it a "hot-topic" in medicine in recent years.
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Affiliation(s)
- Kerstin Amann
- Abt. Nephropathologie, Pathologisches Institut, Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland.
| | - Christoph Daniel
- Abt. Nephropathologie, Pathologisches Institut, Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland
| | - Maike Büttner-Herold
- Abt. Nephropathologie, Pathologisches Institut, Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, Krankenhausstr. 8-10, 91054, Erlangen, Deutschland
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Criscitiello MF, Kraev I, Petersen LH, Lange S. Deimination Protein Profiles in Alligator mississippiensis Reveal Plasma and Extracellular Vesicle-Specific Signatures Relating to Immunity, Metabolic Function, and Gene Regulation. Front Immunol 2020; 11:651. [PMID: 32411128 PMCID: PMC7198796 DOI: 10.3389/fimmu.2020.00651] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 03/23/2020] [Indexed: 12/13/2022] Open
Abstract
Alligators are crocodilians and among few species that endured the Cretaceous-Paleogene extinction event. With long life spans, low metabolic rates, unusual immunological characteristics, including strong antibacterial and antiviral ability, and cancer resistance, crocodilians may hold information for molecular pathways underlying such physiological traits. Peptidylarginine deiminases (PADs) are a group of calcium-activated enzymes that cause posttranslational protein deimination/citrullination in a range of target proteins contributing to protein moonlighting functions in health and disease. PADs are phylogenetically conserved and are also a key regulator of extracellular vesicle (EV) release, a critical part of cellular communication. As little is known about PAD-mediated mechanisms in reptile immunology, this study was aimed at profiling EVs and protein deimination in Alligator mississippiensis. Alligator plasma EVs were found to be polydispersed in a 50-400-nm size range. Key immune, metabolic, and gene regulatory proteins were identified to be posttranslationally deiminated in plasma and plasma EVs, with some overlapping hits, while some were unique to either plasma or plasma EVs. In whole plasma, 112 target proteins were identified to be deiminated, while 77 proteins were found as deiminated protein hits in plasma EVs, whereof 31 were specific for EVs only, including proteins specific for gene regulatory functions (e.g., histones). Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis revealed KEGG pathways specific to deiminated proteins in whole plasma related to adipocytokine signaling, while KEGG pathways of deiminated proteins specific to EVs included ribosome, biosynthesis of amino acids, and glycolysis/gluconeogenesis pathways as well as core histones. This highlights roles for EV-mediated export of deiminated protein cargo with roles in metabolism and gene regulation, also related to cancer. The identification of posttranslational deimination and EV-mediated communication in alligator plasma revealed here contributes to current understanding of protein moonlighting functions and EV-mediated communication in these ancient reptiles, providing novel insight into their unusual immune systems and physiological traits. In addition, our findings may shed light on pathways underlying cancer resistance, antibacterial and antiviral resistance, with translatable value to human pathologies.
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Affiliation(s)
- Michael F. Criscitiello
- Comparative Immunogenetics Laboratory, Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
- Department of Microbial Pathogenesis and Immunology, College of Medicine, Texas A&M Health Science Center, Texas A&M University, College Station, TX, United States
| | - Igor Kraev
- Electron Microscopy Suite, Faculty of Science, Technology, Engineering and Mathematics, Open University, Milton Keynes, United Kingdom
| | - Lene H. Petersen
- Department of Marine Biology, Texas A&M University at Galvestone, Galveston, TX, United States
| | - Sigrun Lange
- Tissue Architecture and Regeneration Research Group, School of Life Sciences, University of Westminster, London, United Kingdom
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Criscitiello MF, Kraev I, Lange S. Post-Translational Protein Deimination Signatures in Serum and Serum-Extracellular Vesicles of Bos taurus Reveal Immune, Anti-Pathogenic, Anti-Viral, Metabolic and Cancer-Related Pathways for Deimination. Int J Mol Sci 2020; 21:E2861. [PMID: 32325910 PMCID: PMC7215346 DOI: 10.3390/ijms21082861] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 12/14/2022] Open
Abstract
The bovine immune system is known for its unusual traits relating to immunoglobulin and antiviral responses. Peptidylarginine deiminases (PADs) are phylogenetically conserved enzymes that cause post-translational deimination, contributing to protein moonlighting in health and disease. PADs also regulate extracellular vesicle (EV) release, forming a critical part of cellular communication. As PAD-mediated mechanisms in bovine immunology and physiology remain to be investigated, this study profiled deimination signatures in serum and serum-EVs in Bos taurus. Bos EVs were poly-dispersed in a 70-500 nm size range and showed differences in deiminated protein cargo, compared with whole sera. Key immune, metabolic and gene regulatory proteins were identified to be post-translationally deiminated with some overlapping hits in sera and EVs (e.g., immunoglobulins), while some were unique to either serum or serum-EVs (e.g., histones). Protein-protein interaction network analysis of deiminated proteins revealed KEGG pathways common for serum and serum-EVs, including complement and coagulation cascades, viral infection (enveloped viruses), viral myocarditis, bacterial and parasitic infections, autoimmune disease, immunodeficiency intestinal IgA production, B-cell receptor signalling, natural killer cell mediated cytotoxicity, platelet activation and hematopoiesis, alongside metabolic pathways including ferroptosis, vitamin digestion and absorption, cholesterol metabolism and mineral absorption. KEGG pathways specific to EVs related to HIF-1 signalling, oestrogen signalling and biosynthesis of amino acids. KEGG pathways specific for serum only, related to Epstein-Barr virus infection, transcription mis-regulation in cancer, bladder cancer, Rap1 signalling pathway, calcium signalling pathway and ECM-receptor interaction. This indicates differences in physiological and pathological pathways for deiminated proteins in serum-EVs, compared with serum. Our findings may shed light on pathways underlying a number of pathological and anti-pathogenic (viral, bacterial, parasitic) pathways, with putative translatable value to human pathologies, zoonotic diseases and development of therapies for infections, including anti-viral therapies.
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Affiliation(s)
- Michael F. Criscitiello
- Comparative Immunogenetics Laboratory, Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA;
- Department of Microbial Pathogenesis and Immunology, College of Medicine, Texas A&M Health Science Center, Texas A&M University, College Station, TX 77843, USA
| | - Igor Kraev
- Electron Microscopy Suite, Faculty of Science, Technology, Engineering and Mathematics, Open University, Milton Keynes MK7 6AA, UK;
| | - Sigrun Lange
- Tissue Architecture and Regeneration Research Group, School of Life Sciences, University of Westminster, London W1W 6XH, UK
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Peron A, Iascone M, Salvatici E, Cavirani B, Marchetti D, Corno S, Vignoli A. PIGW-related glycosylphosphatidylinositol deficiency: Description of a new patient and review of the literature. Am J Med Genet A 2020; 182:1477-1482. [PMID: 32198969 DOI: 10.1002/ajmg.a.61555] [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: 11/26/2019] [Revised: 02/20/2020] [Accepted: 03/02/2020] [Indexed: 12/13/2022]
Abstract
Inherited glycosylphosphatidylinositol (GPI) deficiencies are a group of clinically and genetically heterogeneous conditions belonging to the congenital disorders of glycosylation. PIGW is involved in GPI biosynthesis and modification, and biallelic pathogenic variants in this gene cause autosomal recessive GPI biosynthesis defect 11. Only five patients and two fetuses have been reported in the literature thus far. Here we describe a new patient with a novel homozygous missense variant in PIGW, who presented with hypotonia, severe intellectual disability, early-onset epileptic seizures, brain abnormalities, nystagmus, hand stereotypies, recurrent respiratory infections, distinctive facial features, and hyperphosphatasia. Our report expands the phenotype of GPI biosynthesis defect 11 to include stereotypies and recurrent respiratory infections. A detailed and long-term analysis of the electroclinical characteristics and review of the literature suggest that early-onset epileptic seizures are a key manifestation of GPI biosynthesis defect 11. West syndrome and focal-onset epileptic seizures are the most common seizure types, and the fronto-temporal regions may be the most frequently involved areas in these patients.
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Affiliation(s)
- Angela Peron
- Child Neuropsychiatry Unit-Epilepsy Center (Medical Genetics Clinic), ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, Università degli Studi di Milano, Milan, Italy.,Department of Pediatrics, Division of Medical Genetics, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Maria Iascone
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Elisabetta Salvatici
- Department of Pediatrics, ASST Santi Paolo e Carlo, San Paolo Hospital, Milan, Italy
| | - Benedetta Cavirani
- Child Neuropsychiatry Unit-Epilepsy Center, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Daniela Marchetti
- Laboratorio di Genetica Medica, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Silvia Corno
- Child Neuropsychiatry Unit-Epilepsy Center, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Aglaia Vignoli
- Child Neuropsychiatry Unit-Epilepsy Center, ASST Santi Paolo e Carlo, San Paolo Hospital, Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
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Lima M. Laboratory studies for paroxysmal nocturnal hemoglobinuria, with emphasis on flow cytometry. Pract Lab Med 2020; 20:e00158. [PMID: 32195308 PMCID: PMC7078534 DOI: 10.1016/j.plabm.2020.e00158] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 01/28/2020] [Accepted: 02/28/2020] [Indexed: 12/15/2022] Open
Abstract
Paroxysmal nocturnal hemoglobinuria (PNH) is a rare acquired clonal hematopoietic stem cell disorder caused by somatic mutations in the PIG-A gene, leading to the production of blood cells with absent or decreased expression of glycosylphosphatidylinositol-anchored proteins, including CD55 and CD59. Clinically, PNH is classified into three variants: classic (hemolytic), in the setting of another specified bone marrow disorder (such as aplastic anemia or myelodysplastic syndrome) and subclinical (asymptomatic). PNH testing is recommended for patients with intravascular hemolysis, acquired bone marrow failure syndromes and thrombosis with unusual features. Despite the availability of consensus guidelines for PNH diagnosis and monitoring, there are still discrepancies on how PNH tests are carried out, and these technical variations may lead to an incorrect diagnosis. Herein, we provide a brief historical overview of PNH, focusing on the laboratory tests available and on the current recommendations for PNH diagnosis and monitoring based in flow cytometry.
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Affiliation(s)
- Margarida Lima
- Laboratório de Citometria, Unidade de Diagnóstico Hematológico, Serviço de Hematologia Clínica, Hospital de Santo António (HSA), Centro Hospitalar Universitário do Porto (CHUP), Porto, Portugal
- Unidade Multidisciplinar de Investigação Biomédica, Instituto de Ciências Biomédicas da Universidade do Porto (UMIB/ICBAS/UP), Porto, Portugal
- Laboratório de Citometria, Hospital de Santo António (HSA), Centro Hospitalar Universitário do Porto (CHUP), Ex-CICAP, Rua D. Manuel II, s/n, 4099-001, Porto, Portugal.
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Ricklin D, Mastellos DC, Lambris JD. Therapeutic targeting of the complement system. Nat Rev Drug Discov 2019:10.1038/s41573-019-0055-y. [PMID: 31819218 PMCID: PMC7346643 DOI: 10.1038/s41573-019-0055-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The human complement system constitutes a Janus-faced part of our immune machinery, which confers rapid protection against microbial intruders but can quickly turn against the host and contribute to inflammatory, immune-, age- and foreign body-related clinical complications1 The defence–offence profile often tilts unfavourably during ageing, traumatic insults or genetic dysregulation of the cascade. The list of disorders with known complement contribution is growing constantly, and with it the incentive to control complement activation therapeutically1 –3 . Since the introduction of complement-specific drugs in 2007, and the generally positive experience in the clinic, the interest in developing new therapeutic inhibitors has been growing constantly and has led to a cornucopious pipeline2 –3 . While the clinically available arsenal is currently limited to a few targets and mostly orphan and rare indications, it is expected that the recently sparked confidence and commercial interest will soon lead to a significant broadening of treatment options and, consequently, clinical conditions in which complement-targeted drugs will be applied2 . New frontiers, such as applications in the therapy of cancer or neurological diseases are already on the horizon4 ,5 .
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Affiliation(s)
- Daniel Ricklin
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | | | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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