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Souza EJR, Muller CS, Horimoto AMC, Rezende RA, Guimarães I, Mariz HA, Dantas AT, Da Costa IP, Del-Rio APT, Sekiyama J, Kahwage CB, Kayser C. Geographic variation as a risk factor for digital ulcers in systemic sclerosis patients: a multicentre registry. Scand J Rheumatol 2016; 46:288-295. [DOI: 10.1080/03009742.2016.1233994] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- EJR Souza
- Internal Medicine Service, Santa Casa Hospital, Belo Horizonte, Brazil
| | - CS Muller
- Rheumatology Division, Clinics Hospital, Federal University of Paraná, Curitiba, Brazil
| | - AMC Horimoto
- Rheumatology Division, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - RA Rezende
- Internal Medicine Service, Santa Casa Hospital, Belo Horizonte, Brazil
| | - I Guimarães
- Rheumatology Division, Clinics Hospital, Federal University of Paraná, Curitiba, Brazil
| | - HA Mariz
- Clinics Hospital, Federal University of Pernambuco, Recife, Brazil
| | - AT Dantas
- Clinics Hospital, Federal University of Pernambuco, Recife, Brazil
| | - IP Da Costa
- Rheumatology Division, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - APT Del-Rio
- School of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - J Sekiyama
- School of Medical Sciences, State University of Campinas, Campinas, Brazil
| | - CB Kahwage
- Rheumatology Division, Paulista School of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - C Kayser
- Rheumatology Division, Paulista School of Medicine, Federal University of São Paulo, São Paulo, Brazil
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Abstract
Significant advances have been made in understanding the genetic basis of systemic sclerosis (SSc) in recent years. Genomewide association and other large-scale genetic studies have identified 30 largely immunity-related genes which are significantly associated with SSc. We review these studies, along with genomewide expression studies, proteomic studies, genetic mouse models, and insights from rare sclerodermatous diseases. Collectively, these studies have begun to identify pathways that are relevant to SSc pathogenesis. The findings presented in this review illustrate how both genetic and genomic aberrations play important roles in the development of SSc. However, despite these recent discoveries, there remain major gaps between current knowledge of SSc, a unified understanding of pathogenesis, and effective treatment. To this aim, we address the important issue of SSc heterogeneity and discuss how future research needs to address this in order to develop a clearer understanding of this devastating and complex disease.
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Arismendi M, Giraud M, Ruzehaji N, Dieudé P, Koumakis E, Ruiz B, Airo P, Cusi D, Matucci-Cerinic M, Salvi E, Cuomo G, Hachulla E, Diot E, Caramaschi P, Riccieri V, Avouac J, Kayser C, Allanore Y. Identification of NF-κB and PLCL2 as new susceptibility genes and highlights on a potential role of IRF8 through interferon signature modulation in systemic sclerosis. Arthritis Res Ther 2015; 17:71. [PMID: 25880423 PMCID: PMC4422604 DOI: 10.1186/s13075-015-0572-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Accepted: 02/20/2015] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Systemic sclerosis (SSc) and primary biliary cirrhosis (PBC) are rare polygenic autoimmune diseases (AIDs) characterized by fibroblast dysfunction. Furthermore, both diseases share some genetic bases with other AIDs, as evidenced by autoimmune gene pleiotropism. The present study was undertaken to investigate whether single-nucleotide polymorphisms (SNPs) identified by a large genome-wide association study (GWAS) in PBC might contribute to SSc susceptibility. METHODS Sixteen PBC susceptibility SNPs were genotyped in a total of 1,616 patients with SSc and 3,621 healthy controls from two European populations (France and Italy). RESULTS We observed an association between PLCL2 rs1372072 (odds ratio (OR) = 1.22, 95% confidence interval (CI) 1.12 to 1.33, P adj = 7.22 × 10(-5)), nuclear factor-kappa-B (NF-κB) rs7665090 (OR = 1.15, 95% CI 1.06 to 1.25, P adj = 0.01), and IRF8 rs11117432 (OR = 0.75, 95% CI 0.67 to 0.86, P adj = 2.49 × 10(-4)) with SSc susceptibility. Furthermore, phenotype stratification showed an association between rs1372072 and rs11117432 with the limited cutaneous subgroup (lcSSc) (P adj = 4.45 × 10(-4) and P adj = 0.001), whereas rs7665090 was associated with the diffuse cutaneous subtype (dcSSc) (P adj = 0.003). Genotype-mRNA expression correlation analysis revealed that the IRF8 protective allele was associated with increased interferon-gamma (IFN-γ) expression (P = 0.03) in patients with SSc but decreased type I IFN (IFIT1) expression in patients and controls (P = 0.02). In addition, we found an epistatic interaction between NF-κB and IRF8 (OR = 0.56, 95% CI 0.00 to 0.74, P = 4 × 10(-4)) which in turn revealed that the IRF8 protective effect is dependent on the presence of the NF-κB susceptibility allele. CONCLUSIONS An analysis of pleiotropic genes identified two new susceptibility genes for SSc (NF-κB and PLCL2) and confirmed the IRF8 locus. Furthermore, the IRF8 variant influenced the IFN signature, and we found an interaction between IRF8 and NF-κB gene variants that might play a role in SSc susceptibility.
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Affiliation(s)
- Maria Arismendi
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France. .,CAPES Foundation, Ministry of Education of Brazil, Brasília, DF, 70040-020, Brazil.
| | - Matthieu Giraud
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France.
| | - Nadira Ruzehaji
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France.
| | - Philippe Dieudé
- Paris Diderot University, Rheumatology Department, Hôpital Bichat Claude Bernard, APHP, Paris, France. .,Paris Diderot University, INSERM U699, Hôpital Bichat Claude Bernard, Paris, France.
| | - Eugenie Koumakis
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France.
| | - Barbara Ruiz
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France.
| | - Paolo Airo
- Rheumatology and Clinical Immunology, Spedali Civili, Brescia, Italy.
| | - Daniele Cusi
- University of Milano, Department of Medicine, Surgery and Dentistry San Paolo & Genomics and Bioinformatics Platform, Fondazione Filarete, Milan, Italy.
| | - Marco Matucci-Cerinic
- Department of Biomedicine & Division of Rheumatology AOUC, Department of Rheumatology AVC, Department of Medicine & Denothe Centre, University of Florence, Florence, Italy.
| | - Erika Salvi
- University of Milano, Department of Medicine, Surgery and Dentistry San Paolo & Genomics and Bioinformatics Platform, Fondazione Filarete, Milan, Italy.
| | - Giovanna Cuomo
- Department of Clinical and Experimental Medicine, Rheumatology Unit, Second University of Naples, Naples, Italy.
| | - Eric Hachulla
- Université Lille II, Médecine Interne, Lille, France.
| | | | - Paola Caramaschi
- Rheumatology Unit, Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy.
| | - Valeria Riccieri
- Division of Rheumatology, Department of Medical Clinic and Therapy, University "Sapienza" of Rome, Rome, Italy.
| | - Jérôme Avouac
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France. .,Paris Descartes University, Rheumatology A Department, Cochin Hospital, APHP, Paris, France.
| | - Cristiane Kayser
- Department of Rheumatology, Federal University of São Paulo, São Paulo, Brazil.
| | - Yannick Allanore
- Paris Descartes University, INSERM U1016, Institut Cochin, Sorbonne Paris Cité, Paris, France. .,Paris Descartes University, Rheumatology A Department, Cochin Hospital, APHP, Paris, France.
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Perrot S, Dieudé P, Pérocheau D, Allanore Y. Comparison of Pain, Pain Burden, Coping Strategies, and Attitudes Between Patients with Systemic Sclerosis and Patients with Rheumatoid Arthritis: A Cross-Sectional Study. PAIN MEDICINE 2013; 14:1776-85. [DOI: 10.1111/pme.12213] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Coustet B, Bouaziz M, Dieudé P, Guedj M, Bossini-Castillo L, Agarwal S, Radstake T, Martin J, Gourh P, Elhai M, Koumakis E, Avouac J, Ruiz B, Mayes M, Arnett F, Hachulla E, Diot E, Cracowski JL, Tiev K, Sibilia J, Mouthon L, Frances C, Amoura Z, Carpentier P, Cosnes A, Meyer O, Kahan A, Boileau C, Chiocchia G, Allanore Y. Independent replication and meta analysis of association studies establish TNFSF4 as a susceptibility gene preferentially associated with the subset of anticentromere-positive patients with systemic sclerosis. J Rheumatol 2012; 39:997-1003. [PMID: 22422496 DOI: 10.3899/jrheum.111270] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Independent replication with large cohorts and metaanalysis of genetic associations are necessary to validate genetic susceptibility factors. The known tumor necrosis factor (ligand) superfamily, member 4 gene (TNFSF4) systemic lupus erythematosus (SLE) risk locus has been found to be associated with systemic sclerosis (SSc) in 2 studies, but with discrepancies between them for genotype-phenotype correlation. Our objective was to validate TNFSF4 association with SSc and determine the subset with the higher risk. METHODS Known SLE and SSc TNFSF4 susceptibility variants (rs2205960, rs1234317, rs12039904, rs10912580, and rs844648) were genotyped in 1031 patients with SSc and 1014 controls of French white ancestry. Genotype-phenotype association analysis and meta analysis of available data were performed, providing a population study of 4989 patients with SSc and 4661 controls, all of European white ancestry. RESULTS Allelic and genotypic associations were observed for the 5 single-nucleotide polymorphisms (SNP) with the subset of patients with SSc who are positive for anticentromere antibodies (ACA) and only a trend for association with SSc and limited cutaneous SSc. Rs2205960 exhibited the strongest allelic association in ACA+ patients with SSc [p = 0.0015; OR 1.37 (1.12-1.66)], with significant intra-cohort association when compared to patients with SSc positive for ACA. Metaanalysis confirmed overall association with SSc but also raised preferential association with the ACA+ subset and strongest effect with rs2205960 [T allele p = 0.00013; OR 1.33 (1.15-1.54) and TT genotype p = 0.00046; OR 2.02 (1.36-2.98)]. CONCLUSION We confirm TNFSF4 as an SSc susceptibility gene and rs2205960 as a putative causal variant with preferential association in the ACA+ SSc subphenotype.
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Affiliation(s)
- Baptiste Coustet
- Université Paris Descartes, Rhumatologie A, INSERM U1016, Hôpital Cochin, APHP, Paris, France
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Association of the interleukin-10 1082G/A, 819C/T and 3575T/A gene polymorphisms with systemic sclerosis: a meta-analysis. Mol Biol Rep 2012; 39:6851-5. [PMID: 22307790 DOI: 10.1007/s11033-012-1510-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 01/24/2012] [Indexed: 12/15/2022]
Abstract
Many environmental and genetic factors have been contributed to the development of systemic sclerosis (SSc). To determine whether IL-10 gene polymorphisms are associated with SSc, we conducted a meta-analysis approach. A total of eight studies involving 1,034 SSc cases and 1,815 controls were obtained by electronic database, i.e. Embase, Blackwell, Scopus, China National Knowledge Infrastructure database, Chinese Biomedical database, Google searching. We analyzed three gene polymorphisms, including IL-10 -1082G/A (rs1800896), IL-10 -819C/T (rs1800871), IL-10 -3575T/A (rs1800890). The combined odds ratio (OR) with its 95% confidence interval (95% CI) was calculated using fixed or random effect models. We found that IL-10 819C allele might contribute to SSc susceptibility by fixed effect model and IL-10 3575A allele could be an important risk factor for SSc, especially in European descent. No significant heterogeneity were observed. Under random effect model, there was no evidence of statistically significant association between IL-10 1082G/A polymorphism and SSc. Publication bias was absent in all analyses. However, larger scale primary studies are required to further evaluate the IL-10 polymorphism and SSc.
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Dieudé P, Bouaziz M, Guedj M, Riemekasten G, Airò P, Müller M, Cusi D, Matucci-Cerinic M, Melchers I, Koenig W, Salvi E, Wichmann HE, Cuomo G, Hachulla E, Diot E, Hunzelmann N, Caramaschi P, Mouthon L, Riccieri V, Distler J, Tarner I, Avouac J, Meyer O, Kahan A, Chiocchia G, Boileau C, Allanore Y. Evidence of the contribution of the X chromosome to systemic sclerosis susceptibility: association with the functional IRAK1 196Phe/532Ser haplotype. ACTA ACUST UNITED AC 2012; 63:3979-87. [PMID: 21898345 DOI: 10.1002/art.30640] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Several autoimmune disorders, including systemic sclerosis (SSc), are characterized by a strong sex bias. To date, it is not known whether genes on the sex chromosomes influence SSc susceptibility. Recently, an IRAK1 haplotype that contains the 196Phe functional variant (rs1059702), located on Xq28, was found to confer susceptibility to systemic lupus erythematosus (SLE). This study was undertaken to test for an association between SSc and the IRAK1 SLE risk haplotype. METHODS We tested for an association with the IRAK1 SLE risk haplotype in a discovery set of 849 SSc patients and 625 controls. IRAK1 rs1059702 was further genotyped in a replication set, which included Caucasian women from Italy (493 SSc patients and 509 controls) and Germany (466 SSc patients and 1,083 controls). RESULTS An association between the IRAK1 haplotype and SSc was detected in the discovery set. In both the discovery and replication sets, the rs1059702 TT genotype was found to be associated with specific SSc subsets, highlighting a potential contribution to disease severity. A meta-analysis provided evidence of an association of both the T allele and TT genotype with the overall disease, with an odds ratio (OR) of 1.20 and 95% confidence interval (95% CI) of 1.06-1.35 for the T allele (P = 0.003) and an OR of 1.49 and 95% CI of 1.06-2.10 for the TT genotype (P = 0.023). However, the most notable associations were observed with the diffuse cutaneous, anti-topoisomerase I antibody positive, and SSc-related fibrosing alveolitis subsets (OR 2.35 [95% CI 1.51-3.66], P = 1.56 × 10(-4), OR 2.84 [95% CI 1.87-4.32], P = 1.07 × 10(-6), and OR 2.09 [95% CI 1.35-3.24], P = 9.05 × 10(-4), respectively). CONCLUSION Our study provides the first evidence of an association between IRAK1 and SSc, demonstrating that a sex chromosome gene directly influences SSc susceptibility and its phenotypic heterogeneity.
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Affiliation(s)
- P Dieudé
- Paris Diderot University, AP-HP, INSERM U699, Paris, France.
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KOUMAKIS EUGÉNIE, DIEUDÉ PHILIPPE, AVOUAC JÉRÔME, KAHAN ANDRÉ, ALLANORE YANNICK. Familial Autoimmunity in Systemic Sclerosis — Results of a French-based Case-Control Family Study. J Rheumatol 2012; 39:532-8. [DOI: 10.3899/jrheum.111104] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Objective.To assess the prevalence of autoimmune diseases in first-degree relatives of patients with systemic sclerosis (SSc), and to compare those results with control families in order to identify patterns of autoimmune diseases in relatives.Methods.A retrospective case-control postal questionnaire survey was performed in France to recruit patients with SSc belonging to an association of patients with SSc and unrelated age-matched and sex-matched controls. Each participant was asked to self-report on the existence of autoimmune diseases in their first-degree relatives. The prevalence of autoimmune diseases in the families of patients with SSc was compared with the corresponding prevalence in the families of controls.Results.A total of 121 families out of 373 (32.4%) with a member having SSc reported at least 1 autoimmune disease in 1 or more first-degree relatives. The most frequent autoimmune diseases in SSc families when adjusted for family size were autoimmune thyroid disease (AITD; 4.9%), rheumatoid arthritis (4.1%), psoriasis (3.9%), and type 1 diabetes mellitus (2.9%). Compared with control families, AITD and connective tissue diseases (SSc, systemic lupus erythematosus, or Sjögren’s syndrome) were more likely to occur in families with SSc (p = 0.01 and p = 0.01, respectively), with OR of 3.20 (95% CI 1.25–8.18) and 5.20 (95% CI 1.22–21.8). In contrast, inflammatory bowel disease was less likely to occur within families with SSc (p = 0.02, OR 0.29, 95% CI 0.11–0.80). In addition, the coexistence of more than 1 autoimmune disease in the index SSc case was associated with familial aggregation of autoimmune diseases.Conclusion.Our results show that autoimmune diseases cluster within families of patients with SSc. This supports the notion that these diseases might arise on a shared genetic basis underlying several autoimmune phenotypes.
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Allanore Y, Saad M, Dieudé P, Avouac J, Distler JHW, Amouyel P, Matucci-Cerinic M, Riemekasten G, Airo P, Melchers I, Hachulla E, Cusi D, Wichmann HE, Wipff J, Lambert JC, Hunzelmann N, Tiev K, Caramaschi P, Diot E, Kowal-Bielecka O, Valentini G, Mouthon L, Czirják L, Damjanov N, Salvi E, Conti C, Müller M, Müller-Ladner U, Riccieri V, Ruiz B, Cracowski JL, Letenneur L, Dupuy AM, Meyer O, Kahan A, Munnich A, Boileau C, Martinez M. Genome-wide scan identifies TNIP1, PSORS1C1, and RHOB as novel risk loci for systemic sclerosis. PLoS Genet 2011; 7:e1002091. [PMID: 21750679 PMCID: PMC3131285 DOI: 10.1371/journal.pgen.1002091] [Citation(s) in RCA: 176] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Accepted: 04/05/2011] [Indexed: 12/18/2022] Open
Abstract
Systemic sclerosis (SSc) is an orphan, complex, inflammatory disease affecting the immune system and connective tissue. SSc stands out as a severely incapacitating and life-threatening inflammatory rheumatic disease, with a largely unknown pathogenesis. We have designed a two-stage genome-wide association study of SSc using case-control samples from France, Italy, Germany, and Northern Europe. The initial genome-wide scan was conducted in a French post quality-control sample of 564 cases and 1,776 controls, using almost 500 K SNPs. Two SNPs from the MHC region, together with the 6 loci outside MHC having at least one SNP with a P<10(-5) were selected for follow-up analysis. These markers were genotyped in a post-QC replication sample of 1,682 SSc cases and 3,926 controls. The three top SNPs are in strong linkage disequilibrium and located on 6p21, in the HLA-DQB1 gene: rs9275224, P = 9.18×10(-8), OR = 0.69, 95% CI [0.60-0.79]; rs6457617, P = 1.14×10(-7) and rs9275245, P = 1.39×10(-7). Within the MHC region, the next most associated SNP (rs3130573, P = 1.86×10(-5), OR = 1.36 [1.18-1.56]) is located in the PSORS1C1 gene. Outside the MHC region, our GWAS analysis revealed 7 top SNPs (P<10(-5)) that spanned 6 independent genomic regions. Follow-up of the 17 top SNPs in an independent sample of 1,682 SSc and 3,926 controls showed associations at PSORS1C1 (overall P = 5.70×10(-10), OR:1.25), TNIP1 (P = 4.68×10(-9), OR:1.31), and RHOB loci (P = 3.17×10(-6), OR:1.21). Because of its biological relevance, and previous reports of genetic association at this locus with connective tissue disorders, we investigated TNIP1 expression. A markedly reduced expression of the TNIP1 gene and also its protein product were observed both in lesional skin tissue and in cultured dermal fibroblasts from SSc patients. Furthermore, TNIP1 showed in vitro inhibitory effects on inflammatory cytokine-induced collagen production. The genetic signal of association with TNIP1 variants, together with tissular and cellular investigations, suggests that this pathway has a critical role in regulating autoimmunity and SSc pathogenesis.
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Affiliation(s)
- Yannick Allanore
- Université Paris Descartes, Rhumatologie A, INSERM, U1016, Hôpital Cochin, APHP, Paris, France.
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Coustet B, Dieudé P, Guedj M, Bouaziz M, Avouac J, Ruiz B, Hachulla E, Diot E, Cracowski JL, Tiev K, Sibilia J, Mouthon L, Frances C, Amoura Z, Carpentier P, Cosnes A, Meyer O, Kahan A, Boileau C, Chiocchia G, Allanore Y. C8orf13-BLK is a genetic risk locus for systemic sclerosis and has additive effects with BANK1: Results from a large french cohort and meta-analysis. ACTA ACUST UNITED AC 2011; 63:2091-6. [DOI: 10.1002/art.30379] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Coustet B, Agarwal SK, Gourh P, Guedj M, Mayes MD, Dieude P, Wipff J, Avouac J, Hachulla E, Diot E, Cracowski JL, Tiev K, Sibilia J, Mouthon L, Frances C, Amoura Z, Carpentier P, Meyer O, Kahan A, Boileau C, Arnett FC, Allanore Y. Association study of ITGAM, ITGAX, and CD58 autoimmune risk loci in systemic sclerosis: results from 2 large European Caucasian cohorts. J Rheumatol 2011; 38:1033-8. [PMID: 21362770 PMCID: PMC3404507 DOI: 10.3899/jrheum.101053] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
OBJECTIVE Accumulating evidence shows that shared autoimmunity is critical for the pathogenesis of many autoimmune diseases. Systemic sclerosis (SSc) belongs to the connective tissue disorders, and recent data have highlighted strong associations with autoimmunity genes shared with other autoimmune diseases. To determine whether novel risk loci associated with systemic lupus erythematosus or multiple sclerosis may confer susceptibility to SSc, we tested single-nucleotide polymorphisms (SNP) from ITGAM, ITGAX, and CD58 for associations. METHODS SNP harboring associations with autoimmune diseases, ITGAM rs9937837, ITGAX rs11574637, and CD58 rs12044852, were genotyped in 2 independent cohorts of European Caucasian ancestry: 1031 SSc patients and 1014 controls from France and 1038 SSc patients and 691 controls from the USA, providing a combined study population of 3774 individuals. ITGAM rs1143679 was additionally genotyped in the French cohort. RESULTS The 4 polymorphisms were in Hardy-Weinberg equilibrium in the 2 control populations, and allelic frequencies were similar to those expected in European Caucasian populations. Allelic and genotypic frequencies for these 3 SNP were found to be statistically similar in SSc patients and controls. Subphenotype analyses for subgroups having diffuse cutaneous subtype disease, specific autoantibodies, or fibrosing alveolitis did not reveal any difference between SSc patients and controls. CONCLUSION These results obtained through 2 large cohorts of SSc patients of European Caucasian ancestry do not support the implication of ITGAM, ITGAX, and CD58 genes in the genetic susceptibility of SSc, although they were recently identified as autoimmune disease risk genes.
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Affiliation(s)
- Baptiste Coustet
- Université Paris Descartes, Rhumatologie A, Hôpital Cochin, APHP, Paris, France
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Manetti M, Allanore Y, Revillod L, Fatini C, Guiducci S, Cuomo G, Bonino C, Riccieri V, Bazzichi L, Liakouli V, Cipriani P, Giacomelli R, Abbate R, Bombardieri S, Valesini G, Montecucco C, Valentini G, Ibba-Manneschi L, Matucci-Cerinic M. A genetic variation located in the promoter region of the UPAR (CD87) gene is associated with the vascular complications of systemic sclerosis. ACTA ACUST UNITED AC 2010; 63:247-56. [DOI: 10.1002/art.30101] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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