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Valei Lopes de Oliveira E, Tremeschin de Almeida Vieira F, de Souza Pinhel MA, Gripp AC, Marzocchi-Machado CM, Donadi EA, Roselino AM. Differential FCGR2A and FCGR3A Alleles/Genotypes in Pemphigus Vulgaris and Pemphigus Foliaceus in Southeastern Brazil. J Invest Dermatol 2024; 144:702-705.e1. [PMID: 37806444 DOI: 10.1016/j.jid.2023.09.268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 08/14/2023] [Accepted: 09/06/2023] [Indexed: 10/10/2023]
Affiliation(s)
- Ederson Valei Lopes de Oliveira
- University Hospital, Division of Dermatology, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes Ribeirão Preto, Brazil; Biology Molecular Laboratory, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil
| | - Flavia Tremeschin de Almeida Vieira
- Biology Molecular Laboratory, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil
| | - Marcela Augusta de Souza Pinhel
- Laboratory of Studies in Nutrigenomic, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil
| | - Alexandre Carlos Gripp
- Dermatologia, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cleni Mara Marzocchi-Machado
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil
| | - Eduardo Antonio Donadi
- Biology Molecular Laboratory, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil; Division of Clinical Immunology, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil
| | - Ana Maria Roselino
- University Hospital, Division of Dermatology, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes Ribeirão Preto, Brazil; Biology Molecular Laboratory, Department of Medical Clinics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, Ribeirão Preto, Brazil.
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Cornwell MG, Bannoudi HE, Luttrell-Williams E, Engel A, Barrett TJ, Myndzar K, Izmirly P, Belmont HM, Clancy R, Ruggles KV, Buyon JP, Berger JS. Modeling of clinical phenotypes in systemic lupus erythematosus based on the platelet transcriptome and FCGR2a genotype. J Transl Med 2023; 21:247. [PMID: 37029410 PMCID: PMC10082503 DOI: 10.1186/s12967-023-04059-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 03/12/2023] [Indexed: 04/09/2023] Open
Abstract
BACKGROUND The clinical heterogeneity of SLE with its complex pathogenesis remains challenging as we strive to provide optimal management. The contribution of platelets to endovascular homeostasis, inflammation and immune regulation highlights their potential importance in SLE. Prior work from our group showed that the Fcγ receptor type IIa (FcγRIIa)-R/H131 biallelic polymorphism is associated with increased platelet activity and cardiovascular risk in SLE. The study was initiated to investigate the platelet transcriptome in patients with SLE and evaluate its association across FcγRIIa genotypes and distinct clinical features. METHODS Fifty-one patients fulfilling established criteria for SLE (mean age = 41.1 ± 12.3, 100% female, 45% Hispanic, 24% black, 22% Asian, 51% white, mean SLEDAI = 4.4 ± 4.2 at baseline) were enrolled and compared with 18 demographically matched control samples. The FCGR2a receptor was genotyped for each sample, and RNA-seq was performed on isolated, leukocyte-depleted platelets. Transcriptomic data were used to create a modular landscape to explore the differences between SLE patients and controls and various clinical parameters in the context of FCGR2a genotypes. RESULTS There were 2290 differentially expressed genes enriched for pathways involved in interferon signaling, immune activation, and coagulation when comparing SLE samples vs controls. When analyzing patients with proteinuria, modules associated with oxidative phosphorylation and platelet activity were unexpectedly decreased. Furthermore, genes that were increased in SLE and in patients with proteinuria were enriched for immune effector processes, while genes increased in SLE but decreased in proteinuria were enriched for coagulation and cell adhesion. A low-binding FCG2Ra allele (R131) was associated with decreases in FCR activation, which further correlated with increases in platelet and immune activation pathways. Finally, we were able to create a transcriptomic signature of clinically active disease that performed significantly well in discerning SLE patients with active clinical disease form those with inactive clinical disease. CONCLUSIONS In aggregate, these data demonstrate the platelet transcriptome provides insight into lupus pathogenesis and disease activity, and shows potential use as means of assessing this complex disease using a liquid biopsy.
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Affiliation(s)
- MacIntosh G Cornwell
- Division of Precision Medicine, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
- Institute for Systems Genetics, New York University Grossman School of Medicine, New York, NY, USA
| | - Hanane El Bannoudi
- Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Elliot Luttrell-Williams
- Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Alexis Engel
- Division of Rheumatology, Department of Medicine, New York University Grossman School of Medicine, NYU Grossman School of Medicine, Medical Science Building 593, 530 First Avenue, New York, NY, 10016, USA
| | - Tessa J Barrett
- Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
- Center for the Prevention of Cardiovascular Disease, New York University Grossman School of Medicine, 530 First Avenue, Skirball 9R, New York, NY, 10016, USA
| | - Khrystyna Myndzar
- Division of Rheumatology, Department of Medicine, New York University Grossman School of Medicine, NYU Grossman School of Medicine, Medical Science Building 593, 530 First Avenue, New York, NY, 10016, USA
| | - Peter Izmirly
- Division of Rheumatology, Department of Medicine, New York University Grossman School of Medicine, NYU Grossman School of Medicine, Medical Science Building 593, 530 First Avenue, New York, NY, 10016, USA
| | - H Michael Belmont
- Division of Rheumatology, Department of Medicine, New York University Grossman School of Medicine, NYU Grossman School of Medicine, Medical Science Building 593, 530 First Avenue, New York, NY, 10016, USA
| | - Robert Clancy
- Division of Rheumatology, Department of Medicine, New York University Grossman School of Medicine, NYU Grossman School of Medicine, Medical Science Building 593, 530 First Avenue, New York, NY, 10016, USA
| | - Kelly V Ruggles
- Division of Precision Medicine, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA.
- Institute for Systems Genetics, New York University Grossman School of Medicine, New York, NY, USA.
| | - Jill P Buyon
- Division of Rheumatology, Department of Medicine, New York University Grossman School of Medicine, NYU Grossman School of Medicine, Medical Science Building 593, 530 First Avenue, New York, NY, 10016, USA.
| | - Jeffrey S Berger
- Division of Cardiology, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA.
- Center for the Prevention of Cardiovascular Disease, New York University Grossman School of Medicine, 530 First Avenue, Skirball 9R, New York, NY, 10016, USA.
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Kim J, Lee JY, Kim HG, Kwak MW, Kang TH. Fc Receptor Variants and Disease: A Crucial Factor to Consider in the Antibody Therapeutics in Clinic. Int J Mol Sci 2021; 22:9489. [PMID: 34502398 PMCID: PMC8431278 DOI: 10.3390/ijms22179489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 12/19/2022] Open
Abstract
The fragment crystallizable (Fc) domain of antibodies is responsible for their protective function and long-lasting serum half-life via Fc-mediated effector function, transcytosis, and recycling through its interaction with Fc receptors (FcRs) expressed on various immune leukocytes, epithelial, and endothelial cells. Therefore, the Fc-FcRs interaction is a control point of both endogenous and therapeutic antibody function. There are a number of reported genetic variants of FcRs, which include polymorphisms in (i) extracellular domain of FcRs, which change their affinities to Fc domain of antibodies; (ii) both cytoplasmic and intracellular domain, which alters the extent of signal transduction; and (iii) the promoter region of the FcRs gene, which affects the expression level of FcRs, thus being associated with the pathogenesis of disease indications. In this review, we firstly describe the correlation between the genetic variants of FcRs and immunological disorders by individual differences in the extent of FcRs-mediated regulations. Secondly, we discuss the influence of the genetic variants of FcRs on the susceptibility to infectious diseases or cancer in the perspective of FcRs-induced effector functions. Overall, we concluded that the genetic variants of FcRs are one of the key elements in the design of antibody therapeutics due to their variety of clinical outcomes among individuals.
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Affiliation(s)
- Jin Kim
- Department of Interdisciplinary Program for Bio-Health Convergence, Kookmin University, Seoul 02707, Korea;
| | - Ji Young Lee
- Department of Chemistry, Kookmin University, Seoul 02707, Korea;
| | - Han Gil Kim
- Department of Biopharmaceutical Chemistry, Kookmin University, Seoul 02707, Korea; (H.G.K.); (M.W.K.)
| | - Min Woo Kwak
- Department of Biopharmaceutical Chemistry, Kookmin University, Seoul 02707, Korea; (H.G.K.); (M.W.K.)
| | - Tae Hyun Kang
- Department of Interdisciplinary Program for Bio-Health Convergence, Kookmin University, Seoul 02707, Korea;
- Department of Chemistry, Kookmin University, Seoul 02707, Korea;
- Department of Biopharmaceutical Chemistry, Kookmin University, Seoul 02707, Korea; (H.G.K.); (M.W.K.)
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Junker F, Gordon J, Qureshi O. Fc Gamma Receptors and Their Role in Antigen Uptake, Presentation, and T Cell Activation. Front Immunol 2020; 11:1393. [PMID: 32719679 PMCID: PMC7350606 DOI: 10.3389/fimmu.2020.01393] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/01/2020] [Indexed: 12/24/2022] Open
Abstract
The cellular uptake, intracellular processing, and presentation of foreign antigen are crucial processes for eliciting an effective adaptive host response to the majority of pathogens. The effective recognition of antigen by T cells requires that it is first processed and then presented on MHC molecules that are expressed on other cells. A critical step leading to the presentation of antigen is delivering the foreign cargo to an intracellular compartment where the antigen can be processed and loaded onto MHC molecules. Fc-gamma receptors (FcγRs) recognize IgG-coated targets, such as opsonized pathogens or immune complexes (ICs). Cross-linking leads to internalization of the cargo with associated activation of down-stream signaling cascades. FcγRs vary in their affinity for IgG and intracellular trafficking, and therefore have an opportunity to regulate antigen presentation by controlling the shuttling and processing of their cargos. In this way, they critically influence physiological and pathophysiological adaptive immune cell functions. In this review, we will cover the contribution of FcγRs to antigen-presentation with a focus on the intracellular trafficking of IgG-ICs and the pathways that support this function. We will also discuss genetic evidence linking FcγR biology to immune cell activation and autoimmune processes as exemplified by systemic lupus erythematosus (SLE).
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Affiliation(s)
- Fabian Junker
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - John Gordon
- Celentyx Ltd, Birmingham Research Park, Birmingham, United Kingdom
| | - Omar Qureshi
- Celentyx Ltd, Birmingham Research Park, Birmingham, United Kingdom
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Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by multiple system involvement and positive serum autoantibodies. Lupus nephritis (LN) is the most common and serious complication of SLE, and it is the main cause of death in patients with SLE. Abnormalities in the immune system lead to LN and involve a variety of cells (T cells, B cells, macrophages, NK cells, etc.), cytokines (interleukin, tumor necrosis factor α, etc.) and their related pathways. Previous studies have shown that the interactions of genetic, epigenetic and environmental factors contribute to the pathogenesis and development of LN. In recent years, one genome-wide association study (GWAS) and a number of gene association studies have explored the susceptibility genes of LN, including immunization-, inflammation-, adhesion- and other pathway-related genes. These genes participate in or suggest the pathogenesis and progression of LN. In this review, we summarize the genetic susceptibility of LN and discuss the possible mechanism underlying the susceptibility genes of LN.
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Song K, Liu L, Zhang X, Chen X. An update on genetic susceptibility in lupus nephritis. Clin Immunol 2019; 210:108272. [PMID: 31683055 DOI: 10.1016/j.clim.2019.108272] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/11/2019] [Accepted: 10/09/2019] [Indexed: 12/17/2022]
Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by multiple system involvement and positive serum autoantibodies. Lupus nephritis (LN) is the most common and serious complication of SLE, and it is the main cause of death in patients with SLE. Abnormalities in the immune system lead to LN and involve a variety of cells (T cells, B cells, macrophages, NK cells, etc.), cytokines (interleukin, tumor necrosis factor α, etc.) and their related pathways. Previous studies have shown that the interactions of genetic, epigenetic and environmental factors contribute to the pathogenesis and development of LN. In recent years, one genome-wide association study (GWAS) and a number of gene association studies have explored the susceptibility genes of LN, including immunization-, inflammation-, adhesion- and other pathway-related genes. These genes participate in or suggest the pathogenesis and progression of LN. In this review, we summarize the genetic susceptibility of LN and discuss the possible mechanism underlying the susceptibility genes of LN.
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Affiliation(s)
- Kangkang Song
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, 28 Fuxing Road, Beijing, China
| | - Lu Liu
- Institute of Dermatology and Department of Dermatology at No.1 Hospital, Anhui Medical University, Key Laboratory of Dermatology, Ministry of Education (Anhui Medical University), Hefei, Anhui, China
| | - Xuejun Zhang
- Institute of Dermatology and Department of Dermatology at No.1 Hospital, Anhui Medical University, Key Laboratory of Dermatology, Ministry of Education (Anhui Medical University), Hefei, Anhui, China; Institute of Dermatology and Department of Dermatology, Huashan Hospital of Fudan University, Shanghai, China
| | - Xiangmei Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases, 28 Fuxing Road, Beijing, China.
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Valenzuela NM, Hickey MJ, Reed EF. Antibody Subclass Repertoire and Graft Outcome Following Solid Organ Transplantation. Front Immunol 2016; 7:433. [PMID: 27822209 PMCID: PMC5075576 DOI: 10.3389/fimmu.2016.00433] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Accepted: 10/03/2016] [Indexed: 12/20/2022] Open
Abstract
Long-term outcomes in solid organ transplantation are constrained by the development of donor-specific alloantibodies (DSA) against human leukocyte antigen (HLA) and other targets, which elicit antibody-mediated rejection (ABMR). However, antibody-mediated graft injury represents a broad continuum, from extensive complement activation and tissue damage compromising the function of the transplanted organ, to histological manifestations of endothelial cell injury and mononuclear cell infiltration but without concurrent allograft dysfunction. In addition, while transplant recipients with DSA as a whole fare worse than those without, a substantial minority of patients with DSA do not experience poorer graft outcome. Taken together, these observations suggest that not all DSA are equally pathogenic. Antibody effector functions are controlled by a number of factors, including antibody concentration, antigen availability, and antibody isotype/subclass. Antibody isotype is specified by many integrated signals, including the antigen itself as well as from antigen-presenting cells or helper T cells. To date, a number of studies have described the repertoire of IgG subclasses directed against HLA in pretransplant patients and evaluated the clinical impact of different DSA IgG subclasses on allograft outcome. This review will summarize what is known about the repertoire of antibodies to HLA and non-HLA targets in transplantation, focusing on the distribution of IgG subclasses, as well as the general biology, etiology, and mechanisms of injury of different humoral factors.
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Affiliation(s)
- Nicole M Valenzuela
- UCLA Immunogenetics Center, University of California Los Angeles, Los Angeles, CA, USA; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Michelle J Hickey
- UCLA Immunogenetics Center, University of California Los Angeles, Los Angeles, CA, USA; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Elaine F Reed
- UCLA Immunogenetics Center, University of California Los Angeles, Los Angeles, CA, USA; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
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Mohsin SN, Mahmood S, Amar A, Ghafoor F, Raza SM, Saleem M. Association of FcγRIIa Polymorphism with Clinical Outcome of Dengue Infection: First Insight from Pakistan. Am J Trop Med Hyg 2015; 93:691-6. [PMID: 26240159 DOI: 10.4269/ajtmh.15-0199] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 06/17/2015] [Indexed: 02/03/2023] Open
Abstract
Dengue illness has been a major health concern in Pakistan during the last decade. Dengue infection can result in a spectrum of clinically distinct outcomes, ranging from asymptomatic infection to potentially life-threatening forms of dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS). A single-nucleotide polymorphism in FcγRIIa (rs1801274) results in altered affinity of the receptor for different subclasses of immunoglobulin G, and is a key player in determining the susceptibility to or protection from severe clinical infection of dengue. In this study, we analyzed the allelic and genotypic distribution of rs1801274 in subjects of Pakistani origin with subclinical dengue infection (n = 40), dengue fever (DF) (n = 40), and DHF/DSS (n = 30). We found that HH homozygotes and heterozygotes were significantly more likely to develop clinical dengue (odds ratio [OR] = 3.21, 95% confidence interval [CI] = 1.29-7.97, P = 0.009), either DF (OR = 2.82, 95% CI = 1.00-7.97, P = 0.045) or DHF/DSS (OR = 3.90, 95% CI = 1.13-13.07, P = 0.024) than the asymptomatic dengue infection. Results of allelic distribution comparisons and logistic regression analysis also supported the same relationship. The results suggest complex nature of interacting factors in determining the course for severe dengue illness.
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Affiliation(s)
- Saima Naz Mohsin
- Pakistan Medical Research Council Research Centre, National Health Research Complex, Shaikh Zayed Medical Complex, Lahore, Pakistan; Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan; Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan; Department of Physiology and Cell Biology, University of Health Sciences, Lahore, Pakistan
| | - Saqib Mahmood
- Pakistan Medical Research Council Research Centre, National Health Research Complex, Shaikh Zayed Medical Complex, Lahore, Pakistan; Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan; Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan; Department of Physiology and Cell Biology, University of Health Sciences, Lahore, Pakistan
| | - Ali Amar
- Pakistan Medical Research Council Research Centre, National Health Research Complex, Shaikh Zayed Medical Complex, Lahore, Pakistan; Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan; Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan; Department of Physiology and Cell Biology, University of Health Sciences, Lahore, Pakistan
| | - Farkhanda Ghafoor
- Pakistan Medical Research Council Research Centre, National Health Research Complex, Shaikh Zayed Medical Complex, Lahore, Pakistan; Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan; Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan; Department of Physiology and Cell Biology, University of Health Sciences, Lahore, Pakistan
| | - Syed Mohsin Raza
- Pakistan Medical Research Council Research Centre, National Health Research Complex, Shaikh Zayed Medical Complex, Lahore, Pakistan; Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan; Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan; Department of Physiology and Cell Biology, University of Health Sciences, Lahore, Pakistan
| | - Mahjabeen Saleem
- Pakistan Medical Research Council Research Centre, National Health Research Complex, Shaikh Zayed Medical Complex, Lahore, Pakistan; Institute of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan; Department of Human Genetics and Molecular Biology, University of Health Sciences, Lahore, Pakistan; Department of Physiology and Cell Biology, University of Health Sciences, Lahore, Pakistan
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Valenzuela NM, Trinh KR, Mulder A, Morrison SL, Reed EF. Monocyte recruitment by HLA IgG-activated endothelium: the relationship between IgG subclass and FcγRIIa polymorphisms. Am J Transplant 2015; 15:1502-18. [PMID: 25648976 PMCID: PMC4439339 DOI: 10.1111/ajt.13174] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/01/2014] [Accepted: 12/15/2014] [Indexed: 01/25/2023]
Abstract
It is currently unclear which donor specific HLA antibodies confer the highest risk of antibody-mediated rejection (AMR) and allograft loss. In this study, we hypothesized that two distinct features (HLA IgG subclass and Fcγ receptor [FcγR] polymorphisms) which vary from patient to patient, influence the process of monocyte trafficking to and macrophage accumulation in the allograft during AMR in an interrelated fashion. Here, we investigated the contribution of human IgG subclass and FcγR polymorphisms in monocyte recruitment in vitro by primary human aortic endothelium activated with chimeric anti-HLA I human IgG1 and IgG2. Both subclasses triggered monocyte adhesion to endothelial cells, via a two-step process. First, HLA I crosslinking by antibodies stimulated upregulation of P-selectin on endothelium irrespective of IgG subclass. P-selectin-induced monocyte adhesion was enhanced by secondary interactions of IgG with FcγRs, which was highly dependent upon subclass. IgG1 was more potent than IgG2 through differential engagement of FcγRs. Monocytes homozygous for FcγRIIa-H131 adhered more readily to HLA antibody-activated endothelium compared with FcγRIIa-R131 homozygous. Finally, direct modification of HLA I antibodies with immunomodulatory enzymes EndoS and IdeS dampened recruitment by eliminating antibody-FcγR binding, an approach that may have clinical utility in reducing AMR and other forms of antibody-induced inflammation.
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Affiliation(s)
- Nicole M. Valenzuela
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA
| | - K. Ryan Trinh
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA
| | - Arend Mulder
- Department of Immunohaematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Sherie L. Morrison
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, CA
| | - Elaine F. Reed
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA
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Li Y, Fang X, Li QZ. Biomarker profiling for lupus nephritis. GENOMICS PROTEOMICS & BIOINFORMATICS 2013; 11:158-65. [PMID: 23732627 PMCID: PMC4357827 DOI: 10.1016/j.gpb.2013.05.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Revised: 05/26/2013] [Accepted: 05/26/2013] [Indexed: 12/04/2022]
Abstract
Lupus nephritis (LN) is one of the most severe manifestations of systemic lupus erythematosus (SLE), which is associated with significant morbidity and mortality of SLE patients. The pathogenesis of LN involves multiple factors, including genetic predisposition, epigenetic regulation and environmental interaction. Over the last decade, omics-based techniques have been extensively utilized for biomarker screening and a wide variety of variations which are associated with SLE and LN have been identified at the levels of genomics, transcriptomics and proteomics. These studies and discoveries have expanded our understanding of the molecular basis of the disease and are important for identification of potential therapeutic targets for disease prediction and early treatment. In this review, we summarize some of the recent studies targeted at the identification of LN-associated biomarkers using genomics and proteomic approaches.
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Affiliation(s)
- Yajuan Li
- Department of Immunology and Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiangdong Fang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Quan-Zhen Li
- Department of Immunology and Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Corresponding author.
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Polymorphic genetic variation in immune system genes: a study of two populations of Espirito Santo, Brazil. Mol Biol Rep 2013; 40:4843-9. [PMID: 23666056 PMCID: PMC7088621 DOI: 10.1007/s11033-013-2582-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 04/29/2013] [Indexed: 11/25/2022]
Abstract
Mapping single nucleotide polymorphisms (SNPs) in genes potentially involved in immune responses may help understand the pathophysiology of infectious diseases in specific geographical regions. In this context, we have aimed to analyze the frequency of immunogenetic markers, focusing on genes CD209 (SNP -336A/G), FCγRIIa (SNP -131H/R), TNF-α (SNP -308A/G) and VDR (SNP Taq I) in two populations of the Espirito Santo State (ES), Brazil: general and Pomeranian populations. Peripheral blood genomic DNA was extracted from one hundred healthy individuals of the general population and from 59 Pomeranians. Polymorphic variant identification was performed by polymerase chain reaction-restriction fragment length polymorphism (PCR–RFLP). SNP genotype frequencies were in Hardy–Weinberg Equilibrium. There was no statistically significant difference in allelic and genotypic distributions between the two populations studied. Statistically significant differences were observed for SNP genotype distribution in genes CD209, TNF-α and VDR when comparing the ES populations with other Brazilian populations. This is the first report of CD209, FcγRIIa, TNF-α and VDR allelic frequencies for the general and Pomeranian populations of ES.
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García G, González D, Sánchez L, Pérez AB, Sierra B, Guzmán MG. Polimorfismo del receptor FcγRIIa y su posible relación con las manifestaciones clínicas del dengue. Enferm Infecc Microbiol Clin 2012; 30:621-3. [DOI: 10.1016/j.eimc.2012.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 05/15/2012] [Accepted: 05/27/2012] [Indexed: 10/28/2022]
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13
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Genetics of SLE: functional relevance for monocytes/macrophages in disease. Clin Dev Immunol 2012; 2012:582352. [PMID: 23227085 PMCID: PMC3511832 DOI: 10.1155/2012/582352] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2012] [Revised: 08/24/2012] [Accepted: 09/25/2012] [Indexed: 01/13/2023]
Abstract
Genetic studies in the last 5 years have greatly facilitated our understanding of how the dysregulation of diverse components of the innate immune system contributes to pathophysiology of SLE. A role for macrophages in the pathogenesis of SLE was first proposed as early as the 1980s following the discovery that SLE macrophages were defective in their ability to clear apoptotic cell debris, thus prolonging exposure of potential autoantigens to the adaptive immune response. More recently, there is an emerging appreciation of the contribution both monocytes and macrophages play in orchestrating immune responses with perturbations in their activation or regulation leading to immune dysregulation. This paper will focus on understanding the relevance of genes identified as being associated with innate immune function of monocytes and macrophages and development of SLE, particularly with respect to their role in (1) immune complex (IC) recognition and clearance, (2) nucleic acid recognition via toll-like receptors (TLRs) and downstream signalling, and (3) interferon signalling. Particular attention will be paid to the functional consequences these genetic associations have for disease susceptibility or pathogenesis.
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Long-term persistence of clinical symptoms in dengue-infected persons and its association with immunological disorders. Int J Infect Dis 2011; 15:e38-43. [DOI: 10.1016/j.ijid.2010.09.008] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 08/18/2010] [Accepted: 09/11/2010] [Indexed: 01/19/2023] Open
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García G, Sierra B, Pérez AB, Aguirre E, Rosado I, Gonzalez N, Izquierdo A, Pupo M, Danay Díaz DR, Sánchez L, Marcheco B, Hirayama K, Guzmán MG. Asymptomatic dengue infection in a Cuban population confirms the protective role of the RR variant of the FcgammaRIIa polymorphism. Am J Trop Med Hyg 2010; 82:1153-6. [PMID: 20519616 DOI: 10.4269/ajtmh.2010.09-0353] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The role of human Fcgamma receptors (FcgammaR) has been recognized considerably over the last years. These receptors vary in their affinity for IgG subclasses and the intracellular signals elicited by them. Allelic variants of FcgammaR genes may influence the biological phagocyte activity, accounting for an inherited pre-disposition to disease. The specific FcgammaRIIa (CD32) contains a polymorphic variant (H/R131) that has been associated to a reduced risk for developing dengue hemorrhagic fever (DHF). Here, we investigated the role of this polymorphism in a very well-characterized group of Cuban individuals with antecedents of DHF, dengue fever (DF), or subclinical dengue infection. The HH131 genotype was significantly associated with dengue disease, either DF (*P = 0.016; odds ratio = 4.425; 95% confidence interval = 1.10-20.52) or DHF (P = 0.00018; odds ratio = 10.56; 95% confidence interval = 2.33-54.64) with respect to the subclinical infection.
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Affiliation(s)
- Gissel García
- Department of Virology, Tropical Medicine Institute "Pedro Kourí," Havana, Cuba.
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Pradhan V, Patwardhan M, Nadkarni A, Ghosh K. Fc γ RIIA Genotypes and Its Association with Anti-C1q Autoantibodies in Lupus Nephritis (LN) Patients from Western India. Autoimmune Dis 2010; 2010:470695. [PMID: 21188236 PMCID: PMC3005808 DOI: 10.4061/2010/470695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 10/15/2009] [Accepted: 12/06/2009] [Indexed: 11/22/2022] Open
Abstract
To identify Fc γ RIIA genotypes in Systemic Lupus Erythematosus (SLE) patients and their association with anti-C1q antibodies. Methods. Fc γ RIIA genotyping was done in eighty Indian SLE patients and eighty healthy controls using allele-specific PCR. Anti-C1q antibodies were measured by ELISA. Results. LN patients showed higher SLEDAI (6–32) as compared to SLE patients without renal manifestations and had SLEDAI between 6–23. Fc γ RIIA polymorphic frequency in SLE patients was R131/H131 (67.5%), R131/R131 (20%) and H131/ H131 (12.5%) as against that of normal population (62.5%, 10%, and 27.5%), respectively. Sixty two patients (77.5%) showed positivity for anti-C1q antibodies. LN patients showed elevated levels of anti-C1q antibodies (258.2 u/ml ± 38.5 U/mL) as compared to SLE patients without nephritis (134.6 ± 24.6 U/mL). Among anti-C1q positive patients, 71% had R131/H131 genotype, 22.6% had R131/R131 and remaining 6.4%, patients had H131/H131 genotype. All anti-C1q positive patients with R131/R131 genotype had elevated levels of anti-C1q antibodies (>100 U/ml), whereas among anti-C1q negative patients, none had R131/R131 genotype. Conclusion. This first report on Indian SLE patients supports the hypothesis that Fc γ RIIA R131 variant over expression may constitute a susceptibility factor for development of severe SLE manifestations in LN patients.
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Affiliation(s)
- Vandana Pradhan
- National Institute of Immunohaematology, Indian Council of Medical Research, 13th floor, KEM Hospital, Parel, Mumbai 400 012, India
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Bournazos S, Woof JM, Hart SP, Dransfield I. Functional and clinical consequences of Fc receptor polymorphic and copy number variants. Clin Exp Immunol 2009; 157:244-54. [PMID: 19604264 DOI: 10.1111/j.1365-2249.2009.03980.x] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Receptors for immunoglobulins (Fc receptors) play a central role during an immune response, as they mediate the specific recognition of antigens of almost infinite diversity by leucocytes, thereby linking the humoral and cellular components of immunity. Indeed, engagement of Fc receptors by immunoglobulins initiates a range of immunoregulatory processes that might also play a role in disease pathogenesis. In the circulation, five main types of immunoglobulins (Ig) exist - namely IgG, IgA, IgE, IgM and IgD and receptors with the ability to recognize and bind to IgG (Fc gamma receptor family), IgE (Fc epsilon RI and CD23), IgA (CD89; Fc alpha/microR) and IgM (Fc alpha/microR) have been identified and characterized. However, it is astonishing that nearly all the known human Fc receptors display extensive genetic variation with clear implications for their function, thus representing a substantial genetic risk factor for the pathogenesis of a range of chronic inflammatory disorders.
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Affiliation(s)
- S Bournazos
- Medical Research Council (MRC) Centre for Inflammation Research, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh, UK
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Yuan H, Pan HF, Li LH, Feng JB, Li WX, Li XP, Ye DQ. Meta analysis on the association between FcgammaRIIa-R/H131 polymorphisms and systemic lupus erythematosus. Mol Biol Rep 2008; 36:1053-8. [PMID: 18535921 DOI: 10.1007/s11033-008-9280-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2008] [Accepted: 05/22/2008] [Indexed: 10/22/2022]
Abstract
In order to study the association between FcgammaRIIa gene polymorphisms and the risk of systemic lupus erythematosus (SLE) and lupus nephritis, relevant studies were identified from electronic databases. A meta-analysis of relevant studies was performed for heterogeneity test and pooled OR calculation. When all groups were pooled, a significant association of FcgammaRIIa-R131 allele and increased SLE risk was found. But this association was not observed in lupus nephritis. In the subgroup analysis, a clear effect of R allele in SLE was shown in European and Asian subgroups. Similarly, RR homozygous genotype was found to be a risk factor of SLE and lupus nephritis. The association between RR genotype and SLE was shown in European and Asian descents. However, the association between RR genotype and lupus nephritis was not found in any ethnic subgroups. Taken together, our study suggests that the FcgammaRIIa-R/H131 polymorphism might contribute to the susceptibility to SLE and lupus nephritis.
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Affiliation(s)
- Hui Yuan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, Peoples' Republic of China
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Brown EE, Edberg JC, Kimberly RP. Fc receptor genes and the systemic lupus erythematosus diathesis. Autoimmunity 2008; 40:567-81. [PMID: 18075791 DOI: 10.1080/08916930701763710] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Fc receptors represent a distinct group of hematopoeitic cell surface glycoproteins that have a characterized role in affecting the efficiency of the mononuclear phagocyte system to clear IgG immune complexes. Functional genetic variations in this family of receptors have been identified as heritable susceptibility factors for SLE and lupus nephritis across diverse populations. In this review, we describe the roles of the classical Fc receptors for IgG (Fc gamma) and non-classical Fc-like receptors (FCR1-FCRL6L), Fc receptors for IgE (Fc epsilon RI) and IgA and IgM (Fc alpha/mu R) in SLE diathesis. The combined effects of these genes on SLE pathogenesis, either via linkage disequilibrium or epistasis with additional genetic or environmental factors, provide a challenge for future investigations. The pursuit of a polygenic SLE-profile that includes longitudinal evaluations of SLE and markers involved in the protean clinical manifestations associated with SLE will facilitate our understanding of the cascade of inflammatory events associated with the diathesis.
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Affiliation(s)
- Elizabeth E Brown
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA
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Nimmerjahn F. Activating and inhibitory FcγRs in autoimmune disorders. ACTA ACUST UNITED AC 2006; 28:305-19. [PMID: 17115158 DOI: 10.1007/s00281-006-0052-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2006] [Accepted: 09/29/2006] [Indexed: 10/24/2022]
Abstract
Autoimmune disorders are characterized by the destruction of self-tissues by the immune system. Multiple checkpoints are in place to prevent autoreactivity under normal circumstances. Coexpression of activating and inhibitory Fc receptors (FcR) represents such a checkpoint by establishing a threshold for immune cell activation. In many human autoimmune diseases, however, balanced FcR expression is disturbed. Analysis of murine model systems provides strong evidence that aberrant FcR expression can result in uncontrolled immune responses and the initiation of autoimmune disease. This review will summarize this data and explain how this information might be used to better understand human autoimmune diseases and to develop novel therapeutic strategies.
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Affiliation(s)
- Falk Nimmerjahn
- Laboratory of Molecular Genetics and Immunology, 1230 York Avenue, New York, NY, 10021, USA,
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Mackay M, Stanevsky A, Wang T, Aranow C, Li M, Koenig S, Ravetch JV, Diamond B. Selective dysregulation of the FcgammaIIB receptor on memory B cells in SLE. ACTA ACUST UNITED AC 2006; 203:2157-64. [PMID: 16923849 PMCID: PMC2118390 DOI: 10.1084/jem.20051503] [Citation(s) in RCA: 205] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The inappropriate expansion and activation of autoreactive memory B cells and plasmablasts contributes to loss of self-tolerance in systemic lupus erythematosus (SLE). Defects in the inhibitory Fc receptor, FcγRIIB, have been shown to contribute to B cell activation and autoimmunity in several mouse models of SLE. In this paper, we demonstrate that expression of FcγRIIB is routinely up-regulated on memory B cells in the peripheral blood of healthy controls, whereas up-regulation of FcγRIIB is considerably decreased in memory B cells of SLE patients. This directly correlates with decreased FcγRIIB-mediated suppression of B cell receptor–induced calcium (Ca2+) response in those B cells. We also found substantial overrepresentation of African-American patients among those who failed to up-regulate FcγRIIB. These results suggest that the inhibitory receptor, FcγRIIB, may be impaired at a critical checkpoint in SLE in the regulation of memory B cells; thus, FcγRIIB represents a novel target for therapeutic interventions in this disease.
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Affiliation(s)
- Meggan Mackay
- Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA.
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Current World Literature. Curr Opin Nephrol Hypertens 2005. [DOI: 10.1097/01.mnh.0000172731.05865.69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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