1
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Gao S, Song H. Integrated comparison of the mRNAome in cartilage, synovium, and macrophages in osteoarthritis. Z Rheumatol 2024; 83:62-70. [PMID: 35178608 DOI: 10.1007/s00393-022-01171-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2022] [Indexed: 11/09/2022]
Abstract
The precise molecular mechanisms associated with osteoarthritis (OA), the most common musculoskeletal disorder, are poorly understood. There are currently no effective treatments to prevent the initiation and progression of the disease. In recent years, the development of mRNAome has made it possible to identify new mechanisms and therapeutic targets. However, the differentially expressed genes screened by different microarrays are not completely the same. In order to avoid this shortcoming, we integrate the different genes from different tissues and data sets, and select the commonly expressed genes for further studies.
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Affiliation(s)
- Siming Gao
- Department of Rheumatology, Beijing Jishuitan Hospital, No. 31, Xin Jie Kou East Street, Xicheng District, 100035, Beijing, China
| | - Hui Song
- Department of Rheumatology, Beijing Jishuitan Hospital, No. 31, Xin Jie Kou East Street, Xicheng District, 100035, Beijing, China.
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2
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Hallam TM, Sharp SJ, Andreadi A, Kavanagh D. Complement factor I: Regulatory nexus, driver of immunopathology, and therapeutic. Immunobiology 2023; 228:152410. [PMID: 37478687 DOI: 10.1016/j.imbio.2023.152410] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/23/2023] [Accepted: 06/01/2023] [Indexed: 07/23/2023]
Abstract
Complement factor I (FI) is the nexus for classical, lectin and alternative pathway complement regulation. FI is an 88 kDa plasma protein that circulates in an inactive configuration until it forms a trimolecular complex with its cofactor and substrate whereupon a structural reorganization allows the catalytic triad to cleave its substrates, C3b and C4b. In keeping with its role as the master complement regulatory enzyme, deficiency has been linked to immunopathology. In the setting of complete FI deficiency, a consumptive C3 deficiency results in recurrent infections with encapsulated microorganisms. Aseptic cerebral inflammation and vasculitic presentations are also less commonly observed. Heterozygous mutations in the factor I gene (CFI) have been demonstrated to be enriched in atypical haemolytic uraemic syndrome, albeit with a very low penetrance. Haploinsufficiency of CFI has also been associated with decreased retinal thickness and is a strong risk factor for the development of age-related macular degeneration. Supplementation of FI using plasma purified or recombinant protein has long been postulated, however, technical difficulties prevented progression into clinical trials. It is only using gene therapy that CFI supplementation has reached the clinic with GT005 in phase I/II clinical trials for geographic atrophy.
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Affiliation(s)
- T M Hallam
- Gyroscope Therapeutics Limited, A Novartis Company, Rolling Stock Yard, London N7 9AS, UK; Translational and Clinical Research Institute, Newcastle University, Newcastle-upon-Tyne NE1 7RU, UK; National Renal Complement Therapeutics Centre, Building 26, Royal Victoria Infirmary, UK
| | - S J Sharp
- Gyroscope Therapeutics Limited, A Novartis Company, Rolling Stock Yard, London N7 9AS, UK
| | - A Andreadi
- Translational and Clinical Research Institute, Newcastle University, Newcastle-upon-Tyne NE1 7RU, UK; National Renal Complement Therapeutics Centre, Building 26, Royal Victoria Infirmary, UK
| | - D Kavanagh
- Translational and Clinical Research Institute, Newcastle University, Newcastle-upon-Tyne NE1 7RU, UK; National Renal Complement Therapeutics Centre, Building 26, Royal Victoria Infirmary, UK; NIHR Newcastle Biomedical Research Centre, Biomedical Research Building, Campus for Ageing and Vitality, Newcastle upon Tyne NE4 5PL, UK.
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3
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Shaughnessy J, Chabeda A, Lewis LA, Ram S. Alternative pathway amplification and infections. Immunol Rev 2023; 313:162-180. [PMID: 36336911 DOI: 10.1111/imr.13160] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The alternative pathway (AP) is the phylogenetically oldest arm of the complement system and may have evolved to mark pathogens for elimination by phagocytes. Studies using purified AP proteins or AP-specific serum showed that C3b amplification on bacteria commenced following a lag phase of about 5 min and was highly dependent on the concentration of complement. Most pathogens have evolved several elegant mechanisms to evade complement, including expressing proteases that degrade AP proteins and secreting proteins that block function of C3 convertases. In an example of convergent evolution, many microbes recruit the AP inhibitor factor H (FH) using molecular mechanisms that mimic FH interactions with host cells. In most instances, the AP serves to amplify C3b deposited on microbes by the classical pathway (CP). The role of properdin on microbes appears to be restricted to stabilization of C3 convertases; scant evidence exists for its role as an initiator of the AP on pathogens in the context of serum. Therapeutic complement inhibition carries with it an increased risk of infection. Antibody (Ab)-dependent AP activation may be critical for complement activation by vaccine-elicited Ab when the CP is blocked, and its molecular mechanism is discussed.
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Affiliation(s)
- Jutamas Shaughnessy
- Division of Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Aleyo Chabeda
- Division of Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Lisa A Lewis
- Division of Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Sanjay Ram
- Division of Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
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4
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Moon J. Rare genetic causes of meningitis and encephalitis. ENCEPHALITIS 2022; 2:29-35. [PMID: 37469651 PMCID: PMC10295911 DOI: 10.47936/encephalitis.2021.00164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/15/2021] [Accepted: 12/24/2021] [Indexed: 07/21/2023] Open
Abstract
Differential diagnosis of meningitis and encephalitis is often very challenging because it cannot be determined based on symptoms, and the diseases have various causes. This article explains rare genetic causes of meningitis and encephalitis. Autoinflammatory disorders include cryopyrin-associated periodic syndromes, familial Mediterranean fever, and tumor necrosis factor receptor-associated periodic syndrome. Furthermore, other genetic disorders, such as complement factor I deficiency, phosphatidylinositol glycan anchor biosynthesis class T mutation, and neuronal intranuclear inclusion disease, can present as meningitis and encephalitis.
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Affiliation(s)
- Jangsup Moon
- Rare Disease Center, Departments of Genomic Medicine and Neurology, Seoul National University Hospital, Seoul, Korea
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5
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Steininger J, Rossmanith R, Geier CB, Leiss-Piller A, Thonhauser L, Weiss S, Hainfellner JA, Freilinger M, Schmidt WM, Eibl MM, Wolf HM. Case Report: Meningoencephalitis With Thrombotic Occlusive Vasculopathy in a Young EBV-Naïve Boy Is Associated With a Novel SH2D1A Mutation. Front Immunol 2021; 12:747738. [PMID: 34987501 PMCID: PMC8721048 DOI: 10.3389/fimmu.2021.747738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 10/26/2021] [Indexed: 01/14/2023] Open
Abstract
X-linked lymphoproliferative disease (XLP1) is a combined immunodeficiency characterized by severe immune dysregulation caused by mutations in the SH2D1A/SAP gene. Loss or dysfunction of SH2D1A is associated with the inability in clearing Epstein-Barr-Virus (EBV) infections. Clinical manifestation is diverse and ranges from life-threatening hemophagocytic lymphohistiocytosis (HLH) and fulminant infectious mononucleosis (FIM) to lymphoma and antibody deficiency. Rare manifestations include aplastic anemia, chronic gastritis and vasculitis. Herein, we describe the case of a previously healthy eight-year old boy diagnosed with XLP1 presenting with acute non-EBV acute meningoencephalitis with thrombotic occlusive vasculopathy. The patient developed multiple cerebral aneurysms leading to repeated intracerebral hemorrhage and severe cerebral damage. Immunological examination was initiated after development of a susceptibility to infections with recurrent bronchitis and one episode of severe pneumonia and showed antibody deficiency with pronounced IgG1-3-4 subclass deficiency. We could identify a novel hemizygous SH2D1A point mutation affecting the start codon. Basal levels of SAP protein seemed to be detectable in CD8+ and CD4+ T- and CD56+ NK-cells of the patient what indicated an incomplete absence of SAP. In conclusion, we could demonstrate a novel SH2D1A mutation leading to deficient SAP protein expression and a rare clinical phenotype of non-EBV associated acute meningoencephalitis with thrombotic occlusive vasculopathy.
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Affiliation(s)
| | - Raphael Rossmanith
- Immunology Outpatient Clinic, Vienna, Austria
- Doctoral School Molecular Biology and Biochemistry, Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | | | | | | | - Simone Weiss
- Department of Pediatrics, Klinik Favoriten, Vienna, Austria
| | - Johannes A. Hainfellner
- Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Michael Freilinger
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
| | - Wolfgang M. Schmidt
- Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - Martha M. Eibl
- Immunology Outpatient Clinic, Vienna, Austria
- Biomedizinische Forschungs GmbH, Vienna, Austria
| | - Hermann M. Wolf
- Immunology Outpatient Clinic, Vienna, Austria
- Sigmund Freud Private University- Medical School, Vienna, Austria
- *Correspondence: Hermann M. Wolf,
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6
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Omoyinmi E, Rowczenio D, Sebire N, Brogan PA, Eleftheriou D. Vasculitis in a patient with mevalonate kinase deficiency (MKD): a case report. Pediatr Rheumatol Online J 2021; 19:161. [PMID: 34809655 PMCID: PMC8607720 DOI: 10.1186/s12969-021-00645-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 10/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mevalonate kinase deficiency (MKD) is a rare autoinflammatory condition caused by biallelic loss-of-function (LOF) mutations in mevalonate kinase (MVK) gene encoding the enzyme mevalonate kinase. Patients with MKD display a variety of non-specific clinical manifestations, which can lead to diagnostic delay. We report the case of a child presenting with vasculitis that was found by genetic testing to be caused by MKD, and now add this autoinflammatory disease to the ever-expanding list of causes of monogenic vasculitides. CASE PRESENTATION A 2-year-old male presented with an acute 7-day history of high-grade fever, abdominal pain, diarrhoea, rectal bleeding and extensive purpuric and necrotic lesions, predominantly affecting the lower limbs. He had been suffering from recurrent episodes of fever from early in infancy, associated with maculopapular/petechial rashes triggered by intercurrent infection, and after vaccines. Extensive infection screen was negative. Skin biopsy revealed small vessel vasculitis. Visceral digital subtraction arteriography was normal. With a diagnosis of severe idiopathic cutaneous vasculitis, he was treated with corticosteroids and mycophenolate mofetil. Despite that his acute phase reactants remained elevated, fever persisted and the vasculitic lesions progressed. Next-generation sequencing revealed compound heterozygous mutation in MVK c.928G > A (p.V310M) and c.1129G > A (p.V377I) while reduced mevalonate enzyme activity was confirmed suggesting a diagnosis of MKD as a cause of the severe vasculitis. Prompt targeted treatment with IL-1 blockade was initiated preventing escalation to more toxic vasculitis therapies and reducing unnecessary exposure to cytotoxic treatment. CONCLUSIONS Our report highlights the broad clinical phenotype of MKD that includes severe cutaneous vasculitis and emphasizes the need to consider early genetic screening for young children presenting with vasculitis to exclude a monogenic vasculitis which may be amenable to targeted treatment.
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Affiliation(s)
- Ebun Omoyinmi
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK.
- National Amyloidosis Centre, UCL Medical School, London, UK.
| | | | - Neil Sebire
- Department of Histopathology, Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - Paul A Brogan
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
- Paediatric Rheumatology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Despina Eleftheriou
- Infection, Immunity and Inflammation Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, UK
- Paediatric Rheumatology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, London, UK
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7
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Geier CB, Farmer JR, Foldvari Z, Ujhazi B, Steininger J, Sleasman JW, Parikh S, Dilley MA, Pai SY, Henderson L, Hazen M, Neven B, Moshous D, Sharapova SO, Mihailova S, Yankova P, Naumova E, Özen S, Byram K, Fernandez J, Wolf HM, Eibl MM, Notarangelo LD, Calabrese LH, Walter JE. Vasculitis as a Major Morbidity Factor in Patients With Partial RAG Deficiency. Front Immunol 2020; 11:574738. [PMID: 33193364 PMCID: PMC7609967 DOI: 10.3389/fimmu.2020.574738] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 08/31/2020] [Indexed: 12/30/2022] Open
Abstract
Vasculitis can be a life-threatening complication associated with high mortality and morbidity among patients with primary immunodeficiencies (PIDs), including variants of severe and combined immunodeficiencies ((S)CID). Our understanding of vasculitis in partial defects in recombination activating gene (RAG) deficiency, a prototype of (S)CIDs, is limited with no published systematic evaluation of diagnostic and therapeutic modalities. In this report, we sought to establish the clinical, laboratory features, and treatment outcome of patients with vasculitis due to partial RAG deficiency. Vasculitis was a major complication in eight (13%) of 62 patients in our cohort with partial RAG deficiency with features of infections and immune dysregulation. Vasculitis occurred early in life, often as first sign of disease (50%) and was complicated by significant end organ damage. Viral infections often preceded the onset of predominately non-granulomatous-small vessel vasculitis. Autoantibodies against cytokines (IFN-α, -ω, and IL-12) were detected in a large fraction of the cases tested (80%), whereas the majority of patients were anti-neutrophil cytoplasmic antibodies (ANCA) negative (>80%). Genetic diagnosis of RAG deficiency was delayed up to 2 years from the onset of vasculitis. Clinical cases with sole skin manifestation responded well to first-line steroid treatment, whereas systemic vasculitis with severe end-organ complications required second-line immunosuppression and/or hematopoietic stem cell transplantation (HSCT) for definitive management. In conclusion, our data suggest that vasculitis in partial RAG deficiency is prevalent among patients with partial RAG deficiency and is associated with high morbidity. Therefore, partial RAG deficiency should be included in the differential diagnosis of patients with early-onset systemic vasculitis. Diagnostic serology may be misleading with ANCA negative findings, and search for conventional autoantibodies should be extended to include those targeting cytokines.
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Affiliation(s)
| | - Jocelyn R Farmer
- Harvard Medical School, Massachusetts General Hospital, Boston, MA, United States
| | - Zsofia Foldvari
- Department of Cancer Immunology, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
| | - Boglarka Ujhazi
- University of South Florida and Johns Hopkins All Children's Hospital, Saint Petersburg, FL, United States
| | | | - John W Sleasman
- Division of Allergy, Immunology and Pulmonary Medicine, Duke University School of Medicine, Durham, NC, United States
| | - Suhag Parikh
- Emory University School of Medicine, Atlanta, GA, United States
| | - Meredith A Dilley
- Department of Immunology, Harvard Medical School, Boston Children's Hospital, Boston, MA, United States
| | - Sung-Yun Pai
- Division of Hematology-Oncology, Harvard Medical School, Boston Children's Hospital, Boston, MA, United States.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, United States.,Harvard Medical School, Boston, MA, United States
| | - Lauren Henderson
- Division of Immunology, Department of Rheumatology, Boston Children's Hospital, Boston, MA, United States
| | - Melissa Hazen
- Division of Immunology, Department of Rheumatology, Boston Children's Hospital, Boston, MA, United States
| | - Benedicte Neven
- Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France.,Pediatric Hematology-Immunology and Rheumatology Unit, Necker-Enfants Malades University Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France.,Laboratory "Immunogenetics of Pediatric autoimmune diseases", INSERM UMR1163, Institut Imagine, Université Paris Descartes Sorbonne Paris Cité, Paris, France
| | - Despina Moshous
- Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Paris, France.,Pediatric Hematology-Immunology and Rheumatology Unit, Necker-Enfants Malades University Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France.,Laboratory of Genome Dynamics in The Immune System, Paris, France
| | - Svetlana O Sharapova
- Research Department, Belarusian Research Center for Pediatric Oncology, Hematology and Immunology, Minsk, Belarus
| | - Snezhina Mihailova
- Department of Clinical Immunology Medical University of Sofia, Sofia, Bulgaria
| | - Petya Yankova
- Department of Clinical Immunology Medical University of Sofia, Sofia, Bulgaria
| | - Elisaveta Naumova
- Department of Clinical Immunology Medical University of Sofia, Sofia, Bulgaria
| | - Seza Özen
- Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Kevin Byram
- Cleveland Clinic Center for Vasculitis Care and Research, Cleveland, OH, United States
| | - James Fernandez
- Cleveland Clinic Center for Vasculitis Care and Research, Cleveland, OH, United States
| | - Hermann M Wolf
- Immunology Outpatient Clinic, Vienna, Austria.,Sigmund Freud Private University- Medical School, Vienna, Austria
| | - Martha M Eibl
- Immunology Outpatient Clinic, Vienna, Austria.,Biomedizinische Forschungs GmbH, Vienna, Austria
| | - Luigi D Notarangelo
- Laboratory of Clinical Immunology and Microbiology, NIAID, National Institutes of Health, Bethesda, MD, United States
| | - Leonard H Calabrese
- Cleveland Clinic Center for Vasculitis Care and Research, Cleveland, OH, United States
| | - Jolan E Walter
- University of South Florida at Johns Hopkins All Children's Hospital, Saint Petersburg, FL, United States.,Division of Allergy and Immunology, Massachusetts General Hospital for Children, Boston, MA, United States
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8
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Complement factor I deficiency in a 3-year-old boy with glomerulonephritis. Ann Allergy Asthma Immunol 2020; 125:613-614. [PMID: 32687990 DOI: 10.1016/j.anai.2020.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 07/08/2020] [Accepted: 07/13/2020] [Indexed: 01/11/2023]
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9
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Abstract
PURPOSE OF REVIEW Complement system dysfunction in terms of upregulation, downregulation, or dysregulation can create an imbalance of both host defense and inflammatory response leading to autoimmunity. In this review, we aimed at describing the role of complement system in host defense to inflection and in autoimmunity starting from the evidence from primary and secondary complement system deficiencies. RECENT FINDINGS Complement system has a determinant role in defense against infections: deficiencies of complement components are associated with increased susceptibility to infections. Primary complement system deficiencies are rare disorders that predispose to both infections and autoimmune diseases. Secondary complement system deficiencies are the result of the complement system activation with consumption. Complement system role in enhancing risk of infective diseases in secondary deficiencies has been demonstrated in patients affected by systemic autoimmune disorders, mainly systemic lupus erythematosus and vasculitis. SUMMARY The relationship between the complement system and autoimmunity appears paradoxical as both the deficiency and the activation contribute to inducing autoimmune diseases. In these conditions, the presence of complement deposition in affected tissues, decreased levels of complement proteins, and high levels of complement activation fragments in the blood and vessels have been documented.
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10
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Hong Y, Nanthapisal S, Omoyinmi E, Olbrich P, Neth O, Speckmann C, Lucena JM, Gilmour K, Worth A, Klein N, Eleftheriou D, Brogan P. Secondary C1q Deficiency in Activated PI3Kδ Syndrome Type 2. Front Immunol 2019; 10:2589. [PMID: 31781101 PMCID: PMC6859795 DOI: 10.3389/fimmu.2019.02589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 10/18/2019] [Indexed: 11/13/2022] Open
Abstract
Monogenic forms of vasculitis are rare but increasingly recognized. Furthermore, genetic immunodeficiency is increasingly associated with inflammatory immune dysregulatory features, including vasculitis. This case report describes a child of non-consanguineous parents who presented with chronic digital vasculitis early in life, is of short stature, has facial dysmorphia, immunodeficiency (low serum IgA, high serum IgM), recurrent bacterial infections, lymphoproliferation, absence of detectable serum C1q, and low classical complement pathway activity. We identified a previously reported de novo heterozygous pathogenic splice mutation in PIK3R1 (c.1425 + 1G > A), resulting in the skipping of exon 11 of the p85α subunit of phosphatidylinositol 3-kinase and causing activated PI3Kδ syndrome type II (APDS2). This explained the phenotype, with the exception of digital vasculitis and C1q deficiency, which have never been described in association with APDS2. No mutations were identified in C1QA, B, or C, their promoter regions, or in any other complement component. Functional studies indicated normal monocytic C1q production and release, suggesting that the observed C1q deficiency was caused by peripheral consumption of C1q. Since C1q deficiency has never been associated with APDS2, we assessed C1q levels in two unrelated patients with genetically confirmed APDS2 and confirmed C1q deficiency in those two cases as well. This observation suggests C1q deficiency to be an inherent but previously unrecognized feature of APDS2. We speculate that the consumption of C1q is driven by increased apoptotic bodies derived from immune cellular senescence, combined with elevated IgM production (both inherent features of APDS2). Secondary C1q deficiency in APDS2 may further contribute to immunodeficiency and could also be associated with inflammatory immune dysregulatory phenotypes, such as the digital vasculitis observed in our case.
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Affiliation(s)
- Ying Hong
- Infection, Immunology and Inflammation Research & Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Sira Nanthapisal
- Infection, Immunology and Inflammation Research & Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
- Department of Pediatrics, Thammasat University, Bangkok, Thailand
| | - Ebun Omoyinmi
- Infection, Immunology and Inflammation Research & Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Peter Olbrich
- Paediatric Infectious Diseases, Rheumatology and Immunology Unit, Institut of Biomedicine of Seville, Hospital Universitario Virgen del Rocío, Seville, Spain
| | - Olaf Neth
- Paediatric Infectious Diseases, Rheumatology and Immunology Unit, Institut of Biomedicine of Seville, Hospital Universitario Virgen del Rocío, Seville, Spain
| | - Carsten Speckmann
- Faculty of Medicine, Center for Chronic Immunodeficiency, Medical Center, University of Freiburg, Freiburg im Breisgau, Germany
| | - Jose Manuel Lucena
- Unidad de Inmunología, Hospital Universitario Virgen del Rocio, Seville, Spain
| | - Kimberly Gilmour
- Clinical Immunology Laboratory, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Austen Worth
- Clinical Immunology Laboratory, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Nigel Klein
- Infection, Immunology and Inflammation Research & Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Despina Eleftheriou
- Infection, Immunology and Inflammation Research & Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
- ARUK Centre for Adolescent Rheumatology, UCL, London, United Kingdom
| | - Paul Brogan
- Infection, Immunology and Inflammation Research & Teaching Department, University College London Great Ormond Street Institute of Child Health, London, United Kingdom
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11
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Abstract
Inflammation of the blood vessels that serve the central nervous system has been increasingly identified as an early and possibly initiating event among neurodegenerative conditions such as Alzheimer's disease and related dementias. However, the causal relevance of vascular inflammation to major retinal degenerative diseases is unresolved. Here, we describe how genetics, aging-associated changes, and environmental factors contribute to vascular inflammation in age-related macular degeneration, diabetic retinopathy, and glaucoma. We highlight the importance of mouse models in studying the underlying mechanisms and possible treatments for these diseases. We conclude that data support vascular inflammation playing a central if not primary role in retinal degenerative diseases, and this association should be a focus of future research.
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Affiliation(s)
- Ileana Soto
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, New Jersey 08028, USA;
| | - Mark P Krebs
- The Jackson Laboratory, Bar Harbor, Maine 04609, USA;
| | | | - Gareth R Howell
- The Jackson Laboratory, Bar Harbor, Maine 04609, USA; .,Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts 02111, USA.,Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, Maine 04469, USA
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12
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Shields AM, Pagnamenta AT, Pollard AJ, Taylor JC, Allroggen H, Patel SY. Classical and Non-classical Presentations of Complement Factor I Deficiency: Two Contrasting Cases Diagnosed via Genetic and Genomic Methods. Front Immunol 2019; 10:1150. [PMID: 31231365 PMCID: PMC6568211 DOI: 10.3389/fimmu.2019.01150] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 05/07/2019] [Indexed: 11/13/2022] Open
Abstract
Deficiency of complement factor I is a rare immunodeficiency that typically presents with increased susceptibility to encapsulated bacterial infections. However, non-infectious presentations including rheumatological, dermatological and neurological disease are increasingly recognized and require a high-index of suspicion to reach a timely diagnosis. Herein, we present two contrasting cases of complement factor I deficiency: one presenting in childhood with invasive pneumococcal disease, diagnosed using conventional immunoassays and genetics and the second presenting in adolescence with recurrent sterile neuroinflammation, diagnosed via a genomic approach. Our report and review of the literature highlight the wide spectrum of clinical presentations associated with CFI deficiency and the power of genomic medicine to inform rare disease diagnoses.
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Affiliation(s)
- Adrian M Shields
- Clinical Immunology Service, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom.,Department of Clinical Immunology, John Radcliffe Hospital, Oxford, United Kingdom
| | - Alistair T Pagnamenta
- NIHR Oxford Biomedical Research Centre, Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Andrew J Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
| | | | - Jenny C Taylor
- NIHR Oxford Biomedical Research Centre, Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Holger Allroggen
- Department of Neurology, University Hospital Coventry, Coventry, United Kingdom
| | - Smita Y Patel
- Clinical Immunology Service, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
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13
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Omoyinmi E, Mohamoud I, Gilmour K, Brogan PA, Eleftheriou D. Cutaneous Vasculitis and Digital Ischaemia Caused by Heterozygous Gain-of-Function Mutation in C3. Front Immunol 2018; 9:2524. [PMID: 30443255 PMCID: PMC6221951 DOI: 10.3389/fimmu.2018.02524] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 10/12/2018] [Indexed: 12/22/2022] Open
Abstract
It is now increasingly recognized that some monogenic autoinflammatory diseases and immunodeficiencies cause vasculitis, although genetic causes of vasculitis are extremely rare. We describe a child of non-consanguineous parents who presented with cutaneous vasculitis, digital ischaemia and hypocomplementaemia. A heterozygous p.R1042G gain-of-function mutation (GOF) in the complement component C3 gene was identified as the cause, resulting in secondary C3 consumption and complete absence of alternative complement pathway activity, decreased classical complement activity, and low levels of serum C3 with normal C4 levels. The same heterozygous mutation and immunological defects were also identified in another symptomatic sibling and his father. C3 deficiency due GOF C3 mutations is thus now added to the growing list of monogenic causes of vasculitis and should always be considered in vasculitis patients found to have persistently low levels of C3 with normal C4.
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Affiliation(s)
- Ebun Omoyinmi
- Infection, Inflammation and Rheumatology Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Iman Mohamoud
- Infection, Inflammation and Rheumatology Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Kimberly Gilmour
- Clinical Immunology Laboratory, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Paul A Brogan
- Infection, Inflammation and Rheumatology Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Despina Eleftheriou
- Infection, Inflammation and Rheumatology Section, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom.,Centre for Adolescent Rheumatology, Arthritis Research UK, University College London (UCL), University College London Hospital (UCLH) and Great Ormond Street Hospital (GOSH), London, United Kingdom
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