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Szpakowicz A, Szum-Jakubowska A, Lisowska A, Dubatówka M, Raczkowski A, Czajkowski M, Szczerbiński Ł, Chlabicz M, Krętowski A, Kamiński KA. The FCGR2A Is Associated with the Presence of Atherosclerotic Plaques in the Carotid Arteries-A Case-Control Study. J Clin Med 2023; 12:6480. [PMID: 37892617 PMCID: PMC10607679 DOI: 10.3390/jcm12206480] [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: 09/01/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Atherosclerotic plaques in carotid arteries (APCA) are a prevalent condition with severe potential complications. Studies continuously search for innovative biomarkers for APCA, including those participating in cellular metabolic processes, cell adhesion, immune response, and complement activation. This study aimed to assess the relationship between APCA presence and a broad range of cardiometabolic biomarkers in the general population. METHODS The study group consisted of consecutive participants of the population study Bialystok PLUS. The proximity extension assay (PEA) technique from the Olink Laboratory (Uppsala, Sweden) was used to measure the levels of 92 cardiometabolic biomarkers. RESULTS The study comprised 693 participants (mean age 48.78 ± 15.27 years, 43.4% males, N = 301). APCA was identified in 46.2% of the participants (N = 320). Of the 92 biomarkers that were investigated, 54 were found to be significantly linked to the diagnosis of APCA. After adjusting for the traditional risk factors for atherosclerosis in multivariate analysis, the only biomarker that remained significantly associated with APCA was FCGR2A. CONCLUSION In the general population, the prevalence of APCA is very high. A range of biomarkers are linked with APCA. Nonetheless, the majority of these associations are explained by traditional risk factors for atherosclerosis. The only biomarker that was independently associated with APCA was the FCGR2A.
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Affiliation(s)
- Anna Szpakowicz
- Department of Cardiology, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland; (A.S.)
| | - Aleksandra Szum-Jakubowska
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Waszyngtona 13a, 15-269 Bialystok, Poland
| | - Anna Lisowska
- Department of Cardiology, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland; (A.S.)
| | - Marlena Dubatówka
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Waszyngtona 13a, 15-269 Bialystok, Poland
| | - Andrzej Raczkowski
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Waszyngtona 13a, 15-269 Bialystok, Poland
| | - Marcin Czajkowski
- Department of Informatics, Bialystok University of Technology, Wiejska 45A, 15-351 Bialystok, Poland
| | - Łukasz Szczerbiński
- Clinical Research Centre, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland
- Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland
| | - Małgorzata Chlabicz
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Waszyngtona 13a, 15-269 Bialystok, Poland
- Department of Invasive Cardiology, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland
| | - Adam Krętowski
- Clinical Research Centre, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland
- Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, M. Skłodowskiej-Curie 24A, 15-276 Białystok, Poland
| | - Karol Adam Kamiński
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Waszyngtona 13a, 15-269 Bialystok, Poland
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Dahlqvist J, Fulco CP, Ray JP, Liechti T, de Boer CG, Lieb DJ, Eisenhaure TM, Engreitz JM, Roederer M, Hacohen N. Systematic identification of genomic elements that regulate FCGR2A expression and harbor variants linked with autoimmune disease. Hum Mol Genet 2021; 31:1946-1961. [PMID: 34970970 PMCID: PMC9239749 DOI: 10.1093/hmg/ddab372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/20/2021] [Accepted: 12/23/2021] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND FCGR2A binds antibody-antigen complexes to regulate the abundance of circulating and deposited complexes along with downstream immune and autoimmune responses. Although the abundance of FCRG2A may be critical in immune-mediated diseases, little is known about whether its surface expression is regulated through cis genomic elements and non-coding variants. In the current study, we aimed to characterize the regulation of FCGR2A expression, the impact of genetic variation and its association with autoimmune disease. METHODS We applied CRISPR-based interference and editing to scrutinize 1.7 Mb of open chromatin surrounding the FCGR2A gene to identify regulatory elements. Relevant transcription factors (TFs) binding to these regions were defined through public databases. Genetic variants affecting regulation were identified using luciferase reporter assays and were verified in a cohort of 1996 genotyped healthy individuals using flow cytometry. RESULTS We identified a complex proximal region and five distal enhancers regulating FCGR2A. The proximal region split into subregions upstream and downstream of the transcription start site, was enriched in binding of inflammation-regulated TFs, and harbored a variant associated with FCGR2A expression in primary myeloid cells. One distal enhancer region was occupied by CCCTC-binding factor (CTCF) whose binding site was disrupted by a rare genetic variant, altering gene expression. CONCLUSIONS The FCGR2A gene is regulated by multiple proximal and distal genomic regions, with links to autoimmune disease. These findings may open up novel therapeutic avenues where fine-tuning of FCGR2A levels may constitute a part of treatment strategies for immune-mediated diseases.
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Affiliation(s)
- Johanna Dahlqvist
- Center for Cell Circuits, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA,Department of Medical Sciences, Uppsala University, 751 85 Uppsala, Sweden
| | - Charles P Fulco
- Center for Cell Circuits, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA,Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA,Bristol Myers Squibb, Cambridge, MA 02142, USA
| | - John P Ray
- Center for Cell Circuits, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA,Systems Immunology, Benaroya Research Institute, Seattle, WA 98101, USA
| | - Thomas Liechti
- ImmunoTechnology Section, Vaccine Research Center, NIAID, NIH, Bethesda, MD 20814, USA
| | - Carl G de Boer
- Klarman Cell Observatory, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA,School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - David J Lieb
- Center for Cell Circuits, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA
| | - Thomas M Eisenhaure
- Center for Cell Circuits, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA
| | - Jesse M Engreitz
- Center for Cell Circuits, Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA,Department of Genetics, Stanford University School of Medicine, Stanford, CA, USA,BASE Initiative, Betty Irene Moore Children’s Heart Center, Lucile Packard Children’s Hospital, Stanford University School of Medicine, Stanford, CA, USA
| | - Mario Roederer
- ImmunoTechnology Section, Vaccine Research Center, NIAID, NIH, Bethesda, MD 20814, USA
| | - Nir Hacohen
- To whom correspondence should be addressed at: The Broad Institute of MIT and Harvard University, 415 Main Street, Cambridge, MA 02142, USA. Tel: +1 6177147234, Fax: +1 6177148956;
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3
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Li YH, Luo JY, Fang BB, Du GL, Tian T, Liu F, Li XM, Yang YN. Association between CCN1 gene polymorphism and acute coronary syndrome in Chinese Han and Uygur populations. Hereditas 2021; 158:16. [PMID: 33906697 PMCID: PMC8080382 DOI: 10.1186/s41065-021-00180-2] [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: 12/07/2020] [Accepted: 04/13/2021] [Indexed: 12/04/2022] Open
Abstract
Background CCN1 plays a crucial role in the modulation of cardiovascular diseases. However, whether CCN1 genetic variants are involved in the susceptibility of ACS remains unknown. Hence, the present study investigates the association between CCN1 polymorphisms and ACS among Han and Uygur populations in Xinjiang, China. Results In this case-control study, 1234 Han (547 ACS patients and 687 controls) and 932 Uygur (471 ACS patients and 461 controls) were genotyped using SNPscanTM for three single-nucleotide polymorphisms (SNPs, rs6576776, rs954353, and rs3753794) of the human CCN1 gene. In the Uygur population, we found that the detected frequencies of the C allele (25.3% vs. 18.3%, P<0.001) and CC genotype (6.4% vs. 3.0%, P=0.001) of rs6576776 were significantly higher in the ACS patients than in the control participants. Differences in rs6576776 regarding the dominant model (CC+CG vs. GG, 44.2% vs. 55.8%, P=0.001) and the recessive model (CC vs. CG+GG, 6.4% vs. 93.6%, P=0.016) were observed between the two groups. The frequencies of the GGC and AGC haplotypes in those with ACS were significantly higher than those in the control group (all P<0.05) in the Uygur population. After adjusting for hypertension, diabetes, lipids and smoking, all of which indicate that the rs6576776 C allele is associated with higher risk of ACS (odds ratio (OR)=1.798, 95% confidence interval (CI), 1.218-2.656, P=0.003). In Han population, neither the distribution of genotypes and alleles of the CCN1 gene three SNPs nor the distribution of haplotypes constructed with the three SNPs exhibited a significant difference between the ACS patients and control participants. Conclusions Our study document that the CCN1 gene rs6576776 C allele is associated with higher susceptibility of ACS and that the frequencies of GGC and AGC haplotypes are higher among the Uygur ACS patients.
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Affiliation(s)
- Yan-Hong Li
- Department of Clinical Laboratory, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China.,Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China
| | - Jun-Yi Luo
- Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China.,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, Xinjiang, China
| | - Bin-Bin Fang
- Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China.,State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China
| | - Guo-Li Du
- Department of Endocrinology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China
| | - Ting Tian
- Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China
| | - Fen Liu
- Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China.,State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China
| | - Xiao-Mei Li
- Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China. .,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, Xinjiang, China.
| | - Yi-Ning Yang
- Department of Cardiology, State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, China. .,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, Xinjiang, China. .,People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, 830054, China.
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Henze LA, Luong TT, Boehme B, Masyout J, Schneider MP, Brachs S, Lang F, Pieske B, Pasch A, Eckardt KU, Voelkl J, Alesutan I. Impact of C-reactive protein on osteo-/chondrogenic transdifferentiation and calcification of vascular smooth muscle cells. Aging (Albany NY) 2019; 11:5445-5462. [PMID: 31377747 PMCID: PMC6710049 DOI: 10.18632/aging.102130] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 07/25/2019] [Indexed: 05/01/2023]
Abstract
Medial vascular calcification occurs during the aging process and is strongly accelerated by chronic kidney disease (CKD). Elevated C-reactive protein (CRP) levels are associated with vascular calcification, cardiovascular events and mortality in CKD patients. CRP is an important promoter of vascular inflammation. Inflammatory processes are critically involved in initiation and progression of vascular calcification. Thus, the present study explored a possible impact of CRP on vascular calcification. We found that CRP promoted osteo-/chondrogenic transdifferentiation and aggravated phosphate-induced osteo-/chondrogenic transdifferentiation and calcification of primary human aortic smooth muscle cells (HAoSMCs). These effects were paralleled by increased cellular oxidative stress and corresponding pro-calcific downstream-signaling. Antioxidants or p38 MAPK inhibition suppressed CRP-induced osteo-/chondrogenic signaling and mineralization. Furthermore, silencing of Fc fragment of IgG receptor IIa (FCGR2A) blunted the pro-calcific effects of CRP. Vascular CRP expression was increased in the klotho-hypomorphic mouse model of aging as well as in HAoSMCs during calcifying conditions. In conclusion, CRP augments osteo-/chondrogenic transdifferentiation of vascular smooth muscle cells through mechanisms involving FCGR2A-dependent induction of oxidative stress. Thus, systemic inflammation may actively contribute to the progression of vascular calcification.
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MESH Headings
- Aging/metabolism
- Aging/pathology
- Animals
- C-Reactive Protein/metabolism
- Cell Transdifferentiation/physiology
- Cells, Cultured
- Chondrogenesis/physiology
- Disease Models, Animal
- Glucuronidase/genetics
- Glucuronidase/metabolism
- Humans
- Klotho Proteins
- Mice
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Osteogenesis/physiology
- Oxidative Stress
- RNA, Small Interfering/genetics
- Receptors, IgG/antagonists & inhibitors
- Receptors, IgG/genetics
- Receptors, IgG/metabolism
- Renal Insufficiency, Chronic/complications
- Renal Insufficiency, Chronic/metabolism
- Renal Insufficiency, Chronic/pathology
- Signal Transduction
- Vascular Calcification/etiology
- Vascular Calcification/metabolism
- Vascular Calcification/pathology
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Affiliation(s)
- Laura A. Henze
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
| | - Trang T.D. Luong
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
- Institute for Physiology and Pathophysiology, Johannes Kepler University Linz, Linz 4040, Austria
| | - Beate Boehme
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
| | - Jaber Masyout
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
| | - Markus P. Schneider
- Department of Nephrology and Hypertension, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany
| | - Sebastian Brachs
- Department of Endocrinology, Diabetes and Nutrition, Charité - Universitätsmedizin Berlin, Campus Mitte, Berlin 10115, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin 10115, Germany
| | - Florian Lang
- Department of Physiology I, Eberhard-Karls University, Tübingen 72076, Germany
| | - Burkert Pieske
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin 10115, Germany
- Berlin Institute of Health (BIH), Berlin 10178, Germany
- Department of Internal Medicine and Cardiology, German Heart Center Berlin (DHZB), Berlin 13353, Germany
| | - Andreas Pasch
- Institute for Physiology and Pathophysiology, Johannes Kepler University Linz, Linz 4040, Austria
- Calciscon AG, 2560 Nidau-Biel, Switzerland
| | - Kai-Uwe Eckardt
- Department of Nephrology and Medical Intensive Care, Charité – Universitätsmedizin Berlin, Berlin 10117, Germany
| | - Jakob Voelkl
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
- Institute for Physiology and Pathophysiology, Johannes Kepler University Linz, Linz 4040, Austria
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin 10115, Germany
- Department of Nephrology and Medical Intensive Care, Charité – Universitätsmedizin Berlin, Berlin 10117, Germany
| | - Ioana Alesutan
- Department of Internal Medicine and Cardiology, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin 13353, Germany
- Institute for Physiology and Pathophysiology, Johannes Kepler University Linz, Linz 4040, Austria
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin 10115, Germany
- Berlin Institute of Health (BIH), Berlin 10178, Germany
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Anania JC, Chenoweth AM, Wines BD, Hogarth PM. The Human FcγRII (CD32) Family of Leukocyte FcR in Health and Disease. Front Immunol 2019; 10:464. [PMID: 30941127 PMCID: PMC6433993 DOI: 10.3389/fimmu.2019.00464] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/21/2019] [Indexed: 12/15/2022] Open
Abstract
FcγRs have been the focus of extensive research due to their key role linking innate and humoral immunity and their implication in both inflammatory and infectious disease. Within the human FcγR family FcγRII (activatory FcγRIIa and FcγRIIc, and inhibitory FcγRIIb) are unique in their ability to signal independent of the common γ chain. Through improved understanding of the structure of these receptors and how this affects their function we may be able to better understand how to target FcγR specific immune activation or inhibition, which will facilitate in the development of therapeutic monoclonal antibodies in patients where FcγRII activity may be desirable for efficacy. This review is focused on roles of the human FcγRII family members and their link to immunoregulation in healthy individuals and infection, autoimmunity and cancer.
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Affiliation(s)
- Jessica C Anania
- Centre for Biomedical Research, Burnet Institute, Melbourne, VIC, Australia.,Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Alicia M Chenoweth
- Centre for Biomedical Research, Burnet Institute, Melbourne, VIC, Australia.,Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Bruce D Wines
- Centre for Biomedical Research, Burnet Institute, Melbourne, VIC, Australia.,Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia.,Department of Pathology, The University of Melbourne, Melbourne, VIC, Australia
| | - P Mark Hogarth
- Centre for Biomedical Research, Burnet Institute, Melbourne, VIC, Australia.,Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia.,Department of Pathology, The University of Melbourne, Melbourne, VIC, Australia
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Li L, Liu H, Hu X, Huang Y, Wang Y, He Y, Lei Q. Identification of key genes in non‑alcoholic fatty liver disease progression based on bioinformatics analysis. Mol Med Rep 2018; 17:7708-7720. [PMID: 29620197 PMCID: PMC5983972 DOI: 10.3892/mmr.2018.8852] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 02/22/2018] [Indexed: 12/18/2022] Open
Abstract
Due to economic development and lifestyle changes, the incidence of non-alcoholic fatty liver disease (NAFLD) has gradually increased in recent years. However, the pathogenesis of NAFLD is not yet fully understood. To identify candidate genes that contribute to the development and progression of NAFLD, two microarray datasets were downloaded from the Gene Expression Omnibus database. The differentially expressed genes (DEGs) were identified and functional enrichment analyses were performed. A protein-protein interaction network was constructed and modules were extracted using the Search Tool for the Retrieval of Interacting Genes and Cytoscape. The enriched functions and pathways of the DEGs included ‘cellular macromolecule biosynthetic process’, ‘cellular response to chemical stimulus’, ‘extracellular matrix organization’, ‘metabolic pathways’, ‘insulin resistance’ and ‘forkhead box protein O1 signaling pathway’. The DEGs, including type-1 angiotensin II receptor, formin-binding protein 1-like, RNA-binding protein with serine-rich domain 1, Ras-related C3 botulinum toxin substrate 1 and polyubiquitin-C, were identified using multiple bioinformatics methods and validated in vitro with reverse transcription-quantitative polymerase chain reaction analysis. In conclusion, five hub genes were identified in the present study, and they may aid in understanding of the molecular mechanisms underlying the development and progression of NAFLD.
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Affiliation(s)
- Lin Li
- Department of Liver Disease, Chongqing Traditional Chinese Medicine Hospital, Chongqing 400021, P.R. China
| | - Huabao Liu
- Department of Liver Disease, Chongqing Traditional Chinese Medicine Hospital, Chongqing 400021, P.R. China
| | - Xiaoyu Hu
- Department of Infectious Disease, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610072, P.R. China
| | - Yi Huang
- Department of Liver Disease, Chongqing Traditional Chinese Medicine Hospital, Chongqing 400021, P.R. China
| | - Yanan Wang
- Department of Liver Disease, Chongqing Traditional Chinese Medicine Hospital, Chongqing 400021, P.R. China
| | - Yansha He
- Department of Liver Disease, Chongqing Traditional Chinese Medicine Hospital, Chongqing 400021, P.R. China
| | - Qingsong Lei
- Department of Infectious Disease, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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7
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Waje-Andreassen U, Naess H, Thomassen L, Maroy TH, Mazengia KY, Eide GE, Vedeler CA. Biomarkers Related to Carotid Intima-Media Thickness and Plaques in Long-Term Survivors of Ischemic Stroke. Transl Stroke Res 2015; 6:276-83. [PMID: 25948070 PMCID: PMC4485696 DOI: 10.1007/s12975-015-0403-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Revised: 03/28/2015] [Accepted: 04/28/2015] [Indexed: 12/31/2022]
Abstract
Lifestyle risk factors, inflammation and genetics play a role in the development of atherosclerosis. We therefore studied Fc gamma receptor (FcγR) polymorphisms, interleukin (IL)-10 polymorphisms and other biomarkers related to carotid intima-media thickness (cIMT) in patients with ischemic stroke at a young age. Patients were evaluated 12 years after stroke occurrence. Patients (n = 232) 49 years of age or younger with an index stroke between 1988 and 1997 were retrospectively selected. Blood samples were taken at a first follow-up 6 years after the stroke. At a second follow-up, additional arterial events were registered for 140 patients, new blood samples were taken, and measurements of cIMT and blood pressure (BP) were performed. Unadjusted logistic regression analysis showed that cIMT ≥1 mm was associated with age, male gender, additional arterial events, BP, cholesterol, sedimentation rate, haemoglobin, triglycerides, creatinine, glycolysed haemoglobin (HbA1c) and FcγRIIIB-NaII/NaII. Adjusted backward stepwise logistic regression showed significance for age (odds ratio (OR) 1.13, 95 % confidence interval (CI) 1.04 to1.23, p = 0.003), male gender (OR 4.07, 95 % CI 1.15 to 14.5, p = 0.030), HbA1c (OR 6.65, 95 % CI 1.21 to 36.5, p = 0.029) and FcγRIIIB-NaII/NaII (OR 3.94, 95 % CI 1.08 to 14.3, p = 0.037). In this long-term follow-up study of patients with ischemic stroke at a young age, FcγRIIIB-NaII/NaII was identified as a possible contributing factor for cIMT ≥1 mm together with known risk factors, such as age, male gender, systolic BP, additional arterial events and HbA1c.
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Affiliation(s)
- Ulrike Waje-Andreassen
- Department of Neurology, Haukeland University Hospital, Jonas Lies vei 65, N-5021, Bergen, Norway,
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8
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Tanigaki K, Sundgren N, Khera A, Vongpatanasin W, Mineo C, Shaul PW. Fcγ receptors and ligands and cardiovascular disease. Circ Res 2015; 116:368-84. [PMID: 25593280 DOI: 10.1161/circresaha.116.302795] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Fcγ receptors (FcγRs) classically modulate intracellular signaling on binding of the Fc region of IgG in immune response cells. How FcγR and their ligands affect cardiovascular health and disease has been interrogated recently in both preclinical and clinical studies. The stimulation of activating FcγR in endothelial cells, vascular smooth muscle cells, and monocytes/macrophages causes a variety of cellular responses that may contribute to vascular disease pathogenesis. Stimulation of the lone inhibitory FγcR, FcγRIIB, also has adverse consequences in endothelial cells, antagonizing NO production and reparative mechanisms. In preclinical disease models, activating FcγRs promote atherosclerosis, whereas FcγRIIB is protective, and activating FcγRs also enhance thrombotic and nonthrombotic vascular occlusion. The FcγR ligand C-reactive protein (CRP) has undergone intense study. Although in rodents CRP does not affect atherosclerosis, it causes hypertension and insulin resistance and worsens myocardial infarction. Massive data have accumulated indicating an association between increases in circulating CRP and coronary heart disease in humans. However, Mendelian randomization studies reveal that CRP is not likely a disease mediator. CRP genetics and hypertension warrant further investigation. To date, studies of genetic variants of activating FcγRs are insufficient to implicate the receptors in coronary heart disease pathogenesis in humans. However, a link between FcγRIIB and human hypertension may be emerging. Further knowledge of the vascular biology of FcγR and their ligands will potentially enhance our understanding of cardiovascular disorders, particularly in patients whose greater predisposition for disease is not explained by traditional risk factors, such as individuals with autoimmune disorders.
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Affiliation(s)
- Keiji Tanigaki
- From the Department of Pediatrics, Center for Pulmonary and Vascular Biology (K.T., N.S., C.M., P.W.S.), and Division of Cardiology, Department of Internal Medicine (A.K., W.V.), University of Texas Southwestern Medical Center, Dallas
| | - Nathan Sundgren
- From the Department of Pediatrics, Center for Pulmonary and Vascular Biology (K.T., N.S., C.M., P.W.S.), and Division of Cardiology, Department of Internal Medicine (A.K., W.V.), University of Texas Southwestern Medical Center, Dallas
| | - Amit Khera
- From the Department of Pediatrics, Center for Pulmonary and Vascular Biology (K.T., N.S., C.M., P.W.S.), and Division of Cardiology, Department of Internal Medicine (A.K., W.V.), University of Texas Southwestern Medical Center, Dallas
| | - Wanpen Vongpatanasin
- From the Department of Pediatrics, Center for Pulmonary and Vascular Biology (K.T., N.S., C.M., P.W.S.), and Division of Cardiology, Department of Internal Medicine (A.K., W.V.), University of Texas Southwestern Medical Center, Dallas
| | - Chieko Mineo
- From the Department of Pediatrics, Center for Pulmonary and Vascular Biology (K.T., N.S., C.M., P.W.S.), and Division of Cardiology, Department of Internal Medicine (A.K., W.V.), University of Texas Southwestern Medical Center, Dallas
| | - Philip W Shaul
- From the Department of Pediatrics, Center for Pulmonary and Vascular Biology (K.T., N.S., C.M., P.W.S.), and Division of Cardiology, Department of Internal Medicine (A.K., W.V.), University of Texas Southwestern Medical Center, Dallas.
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Raaz-Schrauder D, Ekici AB, Klinghammer L, Stumpf C, Achenbach S, Herrmann M, Reis A, Garlichs CD. The proinflammatory effect of C-reactive protein on human endothelial cells depends on the FcγRIIa genotype. Thromb Res 2013; 133:426-32. [PMID: 24440139 DOI: 10.1016/j.thromres.2013.12.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 12/18/2013] [Accepted: 12/20/2013] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The stimulatory effects of CRP (C-reactive protein) on endothelial cells are mainly mediated via FcγRIIa. This receptor exists in two different allotypes bearing either arginine (R131) or histidine (H131) at the extracellular amino acid position 131 of the mature protein, but only FcγRIIa-R131 displays high avidity for CRP. This study investigated the role of the FcγRIIa genotype in CRP-stimulated endothelial cells. MATERIALS AND METHODS We tested the effects of CRP on expression of the adhesion molecules ICAM-1, VCAM-1, and E-selectin, as well as the endothelial release of pro-inflammatory molecules as a function of the FcγRIIa-genotype (FcγRIIa-H/H131, FcγRIIa-H/R131, FcγRIIa-R/R131) in HUVEC (Human Umbilical Vein Endothelial Cells). HUVEC were grouped according to their FcγRIIa status by genotyping with an allele specific nested-PCR. The expression of ICAM-1, VCAM-1, and E-selectin on HUVEC was detected by flow cytometry. The release of soluble markers (sCD40L, IL-6, IL-8, MCP-1, tPA, sP-selectin, and sVCAM-1) was measured using a multiplex assay for flow cytometry. RESULTS AND CONCLUSIONS CRP-stimulated expression of ICAM-1 and E-selectin was dependent on the specific FcγRIIa-genotype, with most pronounced induction in HUVEC with the FcγRIIa-R/R genotype, followed by H/R and H/H. In accordance with this finding, the supernatants of stimulated HUVEC with the R/R genotype showed significantly higher levels of tPA, MCP-1, and IL-6. Our data show that CRP stimulates the expression of adhesion molecules and the release of soluble markers by HUVEC as a function of the FcγRIIa-genotype. These findings could be relevant in the context of risk stratification in patients with cardiovascular disease.
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Affiliation(s)
- Dorette Raaz-Schrauder
- Department of Cardiology and Angiology, University Hospital Erlangen, Erlangen, Germany.
| | - Arif B Ekici
- Institute of Human Genetics, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Lutz Klinghammer
- Department of Cardiology and Angiology, University Hospital Erlangen, Erlangen, Germany
| | - Christian Stumpf
- Department of Cardiology and Angiology, University Hospital Erlangen, Erlangen, Germany
| | - Stephan Achenbach
- Department of Cardiology and Angiology, University Hospital Erlangen, Erlangen, Germany
| | - Martin Herrmann
- Department of Rheumatology and Immunology, University Hospital Erlangen, Erlangen, Germany
| | - André Reis
- Institute of Human Genetics, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Christoph D Garlichs
- Department of Cardiology and Angiology, University Hospital Erlangen, Erlangen, Germany
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Mallavia B, Oguiza A, Lopez-Franco O, Recio C, Ortiz-Muñoz G, Lazaro I, Lopez-Parra V, Egido J, Gomez-Guerrero C. Gene Deficiency in Activating Fcγ Receptors Influences the Macrophage Phenotypic Balance and Reduces Atherosclerosis in Mice. PLoS One 2013; 8:e66754. [PMID: 23805273 PMCID: PMC3689671 DOI: 10.1371/journal.pone.0066754] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 05/10/2013] [Indexed: 01/18/2023] Open
Abstract
Immunity contributes to arterial inflammation during atherosclerosis. Oxidized low-density lipoproteins induce an autoimmune response characterized by specific antibodies and immune complexes in atherosclerotic patients. We hypothesize that specific Fcγ receptors for IgG constant region participate in atherogenesis by regulating the inflammatory state of lesional macrophages. In vivo we examined the role of activating Fcγ receptors in atherosclerosis progression using bone marrow transplantation from mice deficient in γ-chain (the common signaling subunit of activating Fcγ receptors) to hyperlipidemic mice. Hematopoietic deficiency of Fcγ receptors significantly reduced atherosclerotic lesion size, which was associated with decreased number of macrophages and T lymphocytes, and increased T regulatory cell function. Lesions of Fcγ receptor deficient mice exhibited increased plaque stability, as evidenced by higher collagen and smooth muscle cell content and decreased apoptosis. These effects were independent of changes in serum lipids and antibody response to oxidized low-density lipoproteins. Activating Fcγ receptor deficiency reduced pro-inflammatory gene expression, nuclear factor-κB activity, and M1 macrophages at the lesion site, while increasing anti-inflammatory genes and M2 macrophages. The decreased inflammation in the lesions was mirrored by a reduced number of classical inflammatory monocytes in blood. In vitro, lack of activating Fcγ receptors attenuated foam cell formation, oxidative stress and pro-inflammatory gene expression, and increased M2-associated genes in murine macrophages. Our study demonstrates that activating Fcγ receptors influence the macrophage phenotypic balance in the artery wall of atherosclerotic mice and suggests that modulation of Fcγ receptor-mediated inflammatory responses could effectively suppress atherosclerosis.
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Affiliation(s)
- Beñat Mallavia
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
| | - Ainhoa Oguiza
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
| | - Oscar Lopez-Franco
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Carlota Recio
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
| | - Guadalupe Ortiz-Muñoz
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Cardiovascular Research Institute, University of California San Francisco, San Francisco, California, United States of America
| | - Iolanda Lazaro
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
| | - Virginia Lopez-Parra
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
| | - Jesus Egido
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
| | - Carmen Gomez-Guerrero
- Renal and Vascular Inflammation Lab, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- Nephrology Department, IIS-Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
- * E-mail:
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11
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Abstract
Pentraxins are innate pattern recognition molecules whose major function is to bind microbial pathogens or cellular debris during infection and inflammation and, by doing so, contribute to the clearance of necrotic cells as well as pathogens through complement activations. Fc receptors are the cellular mediators of antibody functions. Although conceptually separated, both pentraxins and antibodies are important factors in controlling acute and chronic inflammation and infections. In recent years, increasing experimental evidence suggests a direct link between the innate pentraxins and humoral Fc receptors. Specifically, both human and mouse pentraxins recognize major forms of Fc receptors in solution and on cell surfaces with affinities similar to antibodies binding to their low affinity Fc receptors. Like immune complex, pentraxin aggregation and opsonization of pathogen result in Fc receptor and macrophage activation. The recently published crystal structure of human serum amyloid P (SAP) in complex with FcγRIIA further illustrated similarities to antibody recognition. These recent findings implicate a much broader role than complement activation for pentraxins in immunity. This review summarizes the structural and functional work that bridge the innate pentraxins and the adaptive Fc receptor functions. In many ways, pentraxins can be regarded as innate antibodies.
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Affiliation(s)
- Jinghua Lu
- Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Kristopher D. Marjon
- Department of Internal Medicine and Department of Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM, USA
| | - Carolyn Mold
- Department of Internal Medicine and Department of Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM, USA
| | - Terry W. Du Clos
- Department of Internal Medicine and Department of Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, NM, USA
- VA Medical Center, Albuquerque, NM, USA
| | - Peter D. Sun
- Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
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12
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Lopez-Parra V, Mallavia B, Lopez-Franco O, Ortiz-Muñoz G, Oguiza A, Recio C, Blanco J, Nimmerjahn F, Egido J, Gomez-Guerrero C. Fcγ receptor deficiency attenuates diabetic nephropathy. J Am Soc Nephrol 2012; 23:1518-27. [PMID: 22859852 DOI: 10.1681/asn.2011080822] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Among patients with diabetes, increased production of immunoglobulins against proteins modified by diabetes is associated with proteinuria and cardiovascular risk, suggesting that immune mechanisms may contribute to the development of diabetes complications, such as nephropathy. We investigated the contribution of IgG Fcγ receptors to diabetic renal injury in hyperglycemic, hypercholesterolemic mice. We used streptozotocin to induce diabetes in apolipoprotein E-deficient mice and in mice deficient in both apolipoprotein E and γ-chain, the common subunit of activating Fcγ receptors. After 15 weeks, the mice lacking Fcγ receptors had significantly less albuminuria and renal hypertrophy, despite similar degrees of hyperglycemia and hypercholesterolemia, immunoglobulin production, and glomerular immune deposits. Moreover, diabetic Fcγ receptor-deficient mice had less mesangial matrix expansion, inflammatory cell infiltration, and collagen and α-smooth muscle actin content in their kidneys. Accordingly, expression of genes involved in leukocyte infiltration, fibrosis, and oxidative stress was significantly reduced in diabetic kidneys and in mesangial cells cultured from Fcγ receptor-deficient mice. In summary, preventing the activation of Fcγ receptors alleviates renal hypertrophy, inflammation, and fibrosis in hypercholesterolemic mice with diabetes, suggesting that modulating Fcγ receptor signaling may be renoprotective in diabetic nephropathy.
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Affiliation(s)
- Virginia Lopez-Parra
- Renal and Vascular Inflammation Laboratory, IIS-Fundacion Jimenez Diaz, Autonoma University, Avda Reyes Catolicos, 2 28040 Madrid, Spain
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13
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Raaz-Schrauder D, Ekici AB, Munoz LE, Klinghammer L, Voll RE, Leusen JHW, van de Winkel JGJ, Reis A, Schett G, Garlichs CD, Herrmann M. Patients with unstable angina pectoris show an increased frequency of the Fc gamma RIIa R131 allele. Autoimmunity 2012; 45:556-64. [PMID: 22559288 DOI: 10.3109/08916934.2012.682665] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Patients with Systemic Lupus Erythematosus (SLE) carry an increased risk for the development of coronary artery disease (CAD). The R131 allele of the Fc gamma receptor IIa (FcγRIIa) is associated with SLE incidence and disease severity but also with CAD. Compared to stable angina pectoris (SAP) the unstable angina (UAP), as a manifestation of destabilizing CAD, is associated with increased risk of persistent instability, myocardial infarction, and death. Identification of clinically relevant determinants for unstable angina promises reduction of UAP-associated mortality in patients with SLE. We conducted a clinical study among 553 consecutive patients with stable angina pectoris (n = 330) and unstable angina pectoris (n = 223). All patients were genotyped for a frequent functional variant at position 131 of the mature FcγRIIa. UAP, but not SAP was significantly associated with the R/R131 genotype (P < 0.001). In troponin-negative patients with angina carrying the R/R131 genotype the odds ratio for suffering from UAP was 4.02 (95% confidence interval, 2.52-6.41) compared to those with non-R/R131 genotypes. In a multivariable analysis, the R/R131 genotype independently predicted the risk for development of UAP in a model adjusted for classical atherogenic risk factors. Our data imply that risk stratification of SLE- and other high risk patients with troponin-negative angina could be significantly improved by FcγRIIa genotyping.
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14
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Wang X, Liu X, Kishimoto C, Yuan Z. The role of Fcγ receptors in atherosclerosis. Exp Biol Med (Maywood) 2012; 237:609-16. [PMID: 22688821 DOI: 10.1258/ebm.2012.011373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Atherosclerosis is widely considered to be an immune-mediated process. Fcγ receptors (Fcγ Rs) contribute to the regulation of a multitude of immune and inflammatory responses and are implicated in human atherosclerotic lesions. Major cell types involved in the pathogenesis of atherosclerosis express Fcγ Rs and their proatherogenic ligands such as immune complexes and C-reactive protein, which act to activate Fcγ R signaling pathways. This review summarizes recent significant progress addressing the multifaceted roles of Fcγ Rs in atherogenesis which comes from the studies of Fcγ R-deficient animal models, clinical investigations and in vitro molecular and cellular studies. These new findings help us appreciate the emerging role of Fcγ Rs in atherosclerosis, and suggest Fcγ Rs as a potential therapeutic target for atherosclerosis.
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Affiliation(s)
- Xinhong Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, 277 Yanta West Road, Xi'an, China
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15
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Ng HP, Burris RL, Nagarajan S. Attenuated atherosclerotic lesions in apoE-Fcγ-chain-deficient hyperlipidemic mouse model is associated with inhibition of Th17 cells and promotion of regulatory T cells. THE JOURNAL OF IMMUNOLOGY 2011; 187:6082-93. [PMID: 22043015 DOI: 10.4049/jimmunol.1004133] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Though the presence of antioxidized low-density lipoprotein IgG is well documented in clinical and animal studies, the role for FcγRs to the progression of atherosclerosis has not been studied in detail. In the current study, we investigated the role for activating FcγR in the progression of atherosclerosis using apolipoprotein E (apoE)-Fcγ-chain double-knockout (DKO) mice. Relative to apoE knockout (KO) mice, arterial lesion formation was significantly decreased in apoE-Fcγ-chain DKO mice. Bone marrow chimera studies showed reduced lesions in apoE KO mice receiving the bone marrow of apoE-Fcγ-chain DKO mice. Compared to apoE KO mice, antioxidized low-density lipoprotein IgG1 (Th2) and IgG2a (Th1), IL-10, and IFN-γ secretion by activated T cells was increased in apoE-Fcγ-chain DKO mice. These findings suggest that reduced atherosclerotic lesion in apoE-Fcγ-chain DKO mice is not due to a Th1/Th2 imbalance. Interestingly, the number of Th17 cells and the secretion of IL-17 by activated CD4(+) cells were decreased in apoE-Fcγ-chain DKO mice. Notably, the number of regulatory T cells, expression of mRNA, and secretion of TGF-β and IL-10 were increased in apoE-Fcγ-chain DKO mice. Furthermore, secretions of IL-6 and STAT-3 phosphorylation essential for Th17 cell genesis were reduced in apoE-Fcγ-chain DKO mice. Importantly, decrease in Th17 cells in apoE-Fcγ-chain DKO mice was due to reduced IL-6 release by APC of apoE-Fcγ-chain DKO mice. Collectively, our data suggest that activating FcγR promotes atherosclerosis by inducing a Th17 response in the hyperlipidemic apoE KO mouse model.
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Affiliation(s)
- Hang Pong Ng
- Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
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16
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Schneider MP, Leusen JHW, Herrmann M, Garlichs CD, Amann K, John S, Schmieder RE. The Fcγ receptor IIA R131H gene polymorphism is associated with endothelial function in patients with hypercholesterolaemia. Atherosclerosis 2011; 218:411-5. [PMID: 21813128 DOI: 10.1016/j.atherosclerosis.2011.07.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2011] [Revised: 05/29/2011] [Accepted: 07/05/2011] [Indexed: 10/17/2022]
Abstract
OBJECTIVE A gene polymorphism substituting arginine (R) for histidine (H) at position 131 has been described within the Fcγ receptor IIa (FcγRIIa). The R allele is associated with increased binding of CRP and enhanced activation of monocytes. FcγRIIa is also expressed on endothelial cells, and we hypothesized this polymorphism would be associated with alterations of endothelial function. METHODS Genomic DNA was extracted and allele-specific PCR reactions were used to determine the FcγRIIa H131R polymorphism in 78 hypercholesterolaemic subjects. Using strain gauge plethysmography, forearm blood flow (FBF) responses were determined to intra-arterial infusion of acetylcholine (ACH), for endothelium-dependent vasodilatation (EDV), to nitroprusside (NP), for endothelium-independent vasodilatation (EIV), to NG-monomethyl-l-arginine (l-NMMA), for basal NO activity, and to ACH in the presence of l-NMMA, to assess the contribution of NO release to EDV. RESULTS Homozygous carriers of the H allele (n=30) had significantly better EDV than homozygous carriers of the R allele (n=15), while heterozygotes showed an intermediate phenotype (n=33) (e.g. % increase of FBF to ACH 48μg/min: 527±359% in H/H versus 452±262% in H/R versus 332±413% in R/R, p=0.0012 by 2-way ANOVA). EIV and basal NO activity were not affected by genotype, and co-infusion of l-NMMA abolished the differences in EDV. CONCLUSIONS The R allele of the FcγRIIa polymorphism is associated with impaired EDV and reduced NO activity during endothelial cell stimulation. These data suggest that the functional effects of the FcγRIIa H131R gene polymorphism previously observed in vitro translate into clinically relevant alterations of endothelial function in vivo.
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Affiliation(s)
- Markus P Schneider
- Department of Nephrology and Hypertension, University of Erlangen-Nuremberg, Germany.
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17
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Kroupis C, Theodorou M, Chaidaroglou A, Dalamaga M, Oliveira SC, Cokkinos DV, Degiannis D, Manginas A. The Association Between a CommonFCGR2APolymorphism and C-Reactive Protein and Coronary Artery Disease Revisited. Genet Test Mol Biomarkers 2010; 14:839-46. [DOI: 10.1089/gtmb.2010.0108] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Christos Kroupis
- Department of Clinical Biochemistry, Attikon University Hospital, University of Athens Medical School, Haidari, Greece
- Molecular Immunopathology Laboratory, Onassis Cardiac Center, Kalithea, Greece
| | - Maria Theodorou
- Department of Clinical Biochemistry, Attikon University Hospital, University of Athens Medical School, Haidari, Greece
- Molecular Immunopathology Laboratory, Onassis Cardiac Center, Kalithea, Greece
| | | | - Maria Dalamaga
- Department of Clinical Biochemistry, Attikon University Hospital, University of Athens Medical School, Haidari, Greece
| | - Samantha C. Oliveira
- Department of Clinical Biochemistry, Attikon University Hospital, University of Athens Medical School, Haidari, Greece
| | - Dennis V. Cokkinos
- 1st Department of Cardiology, Onassis Cardiac Center, Kalithea, Greece
- Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Dimitrios Degiannis
- Molecular Immunopathology Laboratory, Onassis Cardiac Center, Kalithea, Greece
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18
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Erdmann J, Willenborg C, Nahrstaedt J, Preuss M, Konig IR, Baumert J, Linsel-Nitschke P, Gieger C, Tennstedt S, Belcredi P, Aherrahrou Z, Klopp N, Loley C, Stark K, Hengstenberg C, Bruse P, Freyer J, Wagner AK, Medack A, Lieb W, Grosshennig A, Sager HB, Reinhardt A, Schafer A, Schreiber S, El Mokhtari NE, Raaz-Schrauder D, Illig T, Garlichs CD, Ekici AB, Reis A, Schrezenmeir J, Rubin D, Ziegler A, Wichmann HE, Doering A, Meisinger C, Meitinger T, Peters A, Schunkert H. Genome-wide association study identifies a new locus for coronary artery disease on chromosome 10p11.23. Eur Heart J 2010; 32:158-68. [DOI: 10.1093/eurheartj/ehq405] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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The inhibitory FcγRIIb modulates the inflammatory response and influences atherosclerosis in male apoE(-/-) mice. Atherosclerosis 2010; 214:73-80. [PMID: 21084088 DOI: 10.1016/j.atherosclerosis.2010.10.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 10/05/2010] [Accepted: 10/11/2010] [Indexed: 01/18/2023]
Abstract
BACKGROUND Atherosclerosis is widely accepted as an inflammatory disease involving both innate and adaptive immunity. B cells and/or antibodies have previously been shown to play a protective role against atherosclerosis. Aside from their ability to bind to antigens, antibodies can influence inflammatory responses by interacting with various Fcγ receptors on the surface of antigen presenting cells. Although studies in mice have determined that stimulatory Fcγ receptors contribute to atherosclerosis, the role of the inhibitory Fcγ receptor IIb (FcγRIIb) has only recently been investigated. METHODS AND RESULTS To determine the importance of FcγRIIb in modulating the adaptive immune response to hyperlipidemia, we generated FcγRIIb-deficient mice on the apoE-deficient background (apoE/FcγRIIb(-/-)). We report that male apoE/FcγRIIb(-/-) mice develop exacerbated atherosclerosis that is independent of lipid levels, and is characterized by increased antibody titers to modified LDL and pro-inflammatory cytokines in the aorta. CONCLUSIONS These findings suggest that antibodies against atherosclerosis-associated antigens partially protect against atherosclerosis in male apoE(-/-) mice by conveying inhibitory signals through the FcγRIIb that downregulate pro-inflammatory signaling via other immune receptors. These data are the first to describe a significant in vivo effect for FcγRIIb in modulating the cytokine response in the aorta in male apoE(-/-) mice.
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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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