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Interaction between Long Noncoding RNAs and Syncytin-1/Syncytin-2 Genes and Transcripts: How Noncoding RNAs May Affect Pregnancy in Patients with Systemic Lupus Erythematosus. Int J Mol Sci 2023; 24:ijms24032259. [PMID: 36768581 PMCID: PMC9917164 DOI: 10.3390/ijms24032259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/27/2022] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Patients with systemic lupus erythematosus (SLE) often suffer from obstetric complications not necessarily associated with the antiphospholipid syndrome. These events may potentially result from the reduced placental synthesis of the fusogenic proteins syncytin-1 and syncytin-2, observed in women with pregnancy-related disorders. SLE patients have an aberrant noncoding (nc)RNA signature that may in turn dysregulate the expression of syncytin-1 and syncytin-2 during placentation. The aim of this research is to computationally evaluate and characterize the interaction between syncytin-1 and syncytin-2 genes and human ncRNAs and to discuss the potential implications for SLE pregnancy adverse outcomes. METHODS The FASTA sequences of the syncytin-1 and syncytin-2 genes were used as inputs to the Ensembl.org library to find any alignments with human ncRNA genes and their transcripts, which were characterized for their tissue expression, regulatory activity on adjacent genes, biological pathways, and potential association with human disease. RESULTS BLASTN analysis revealed a total of 100 hits with human long ncRNAs (lncRNAs) for the syncytin-1 and syncytin-2 genes, with median alignment scores of 151 and 66.7, respectively. Only lncRNAs TP53TG1, TTTY14, and ENSG00000273328 were reported to be expressed in placental tissue. Dysregulated expression of lncRNAs TP53TG1, LINC01239, and LINC01320 found in this analysis has previously been described in SLE patients as well as in women with a high-risk pregnancy. In addition, some of the genes adjacent to lncRNAs aligned with syncytin-1 or syncytin-2 in a regulatory region might increase the risk of pregnancy complications or SLE. CONCLUSIONS This is the first computational study showing alignments between syncytin-1 and syncytin-2 genes and human lncRNAs. Whether this mechanism affects syncytiotrophoblast morphogenesis in SLE females is unknown and requires further investigation.
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Saldanha CF, Kniphoff da Silva G, Glesse N, Tavares Brenol JC, Xavier RM, Bogo Chies JA, Monticielo OA. MBL2 gene polymorphisms and its relation to infection in Brazilian systemic lupus erythematosus patients: A 10-years follow-up study. Lupus 2022; 31:279-286. [PMID: 35104178 DOI: 10.1177/09612033211066457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Systemic lupus erythematosus (SLE) is a multifactorial disease and MBL2 genetic variants, which are associated to differential peripheral MBL levels, potentially affect its etiology and increase infection risk in this population. OBJECTIVE To evaluate the potential association of MBL2 polymorphisms of the coding and promoter gene region and haplotypes on hospitalization, number of admission and days of admission for major infection causes in Brazilian SLE patients. Methods: 325 SLE patients from a southern Brazilian outpatient SLE clinic were genotyped in 2006 for MBL2 gene polymorphisms from coding and promoter region (rs1800450, rs1800451, rs5030737, rs11003125, and rs7096206) and followed until 2016. Clinical and laboratory data from each patient were obtained and information regarding the need for hospitalization, the number of admissions and number of days admitted for infection treatment were compiled and compared with MBL2 gene polymorphisms and haplotypes. A linear regression analysis was constructed considering the variables of bivariate which demonstrated an association (p<0.05) and variables which had a theoretical basement. RESULTS No difference was found in polymorphism prevalence when comparing the group that was admitted for infection treatment and the group who did not. Allele C, and haplotypes LY and HY correlated with more infection hospitalizations [wild-type homozygosis for C: 2 (IQR 1-3), heterozygosis for C: 3 (IQR 2-6) p=0.038; LY 2 (IQR 1-3) p=0.049; HY 2 (IQR 1-3) p=0.005] and haplotype HY carriers stayed fewer days in hospital for infection treatment: 18 (IQR 10-38) p=0.041. When linear regression was applied HY associated with shorter admission time for infections (-18.11 days, p=0.021) and HY (-1.52 admission, p 0.001) carriers with older age at diagnosis had less admissions for infection (HY regression model: -0.42, p=0.006; LY regression model -0.04, p=0.010; -0.04, p=0.013). CONCLUSION The presence of the HY promoter haplotype associated to fewer in hospital care for infection treatment probably due to higher MBL plasma levels. Also, HY haplotype and older age at SLE diagnosis is related to less admissions for infection. This factor should be taken into consideration, since infection is a very import cause of mortality in SLE patients being also related to aggressive immunosuppressive treatment.
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Affiliation(s)
- Carla Forgiarini Saldanha
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Uruguaiana, Brazil
| | - Gabriela Kniphoff da Silva
- Department of Genetics, Programa de Pós-Graduação Em Genética e Biologia Molecular, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - Nadine Glesse
- Department of Genetics, Programa de Pós-Graduação Em Genética e Biologia Molecular, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - João Carlos Tavares Brenol
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Uruguaiana, Brazil
| | - Ricardo Machado Xavier
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Uruguaiana, Brazil
| | - José Artur Bogo Chies
- Department of Genetics, Programa de Pós-Graduação Em Genética e Biologia Molecular, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Brazil
| | - Odirlei André Monticielo
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, RinggoldID:%2028124Universidade Federal Do Rio Grande Do Sul, Uruguaiana, Brazil
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Chatterjee S, Ugonotti J, Lee LY, Everest-Dass A, Kawahara R, Thaysen-Andersen M. Trends in oligomannosylation and α1,2-mannosidase expression in human cancers. Oncotarget 2021; 12:2188-2205. [PMID: 34676051 PMCID: PMC8522845 DOI: 10.18632/oncotarget.28064] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/18/2021] [Indexed: 02/05/2023] Open
Abstract
Aberrant protein glycosylation is a prominent cancer feature. While many tumour-associated glycoepitopes have been reported, advances in glycoanalytics continue to uncover new associations between glycosylation and cancer. Guided by a comprehensive literature survey suggesting that oligomannosylation (Man5–9 GlcNAc2) is a widespread and often regulated glycosignature in human cancers, we here revisit a valuable compilation of nearly 500 porous graphitized carbon LC-MS/MS N-glycomics datasets acquired across 11 human cancer types to systematically test for oligomannose-cancer associations. Firstly, the quantitative glycomics data obtained across 34 cancerous cell lines demonstrated that oligomannosylation is a pan-cancer feature spanning in a wide abundance range. In keeping with literature, our quantitative glycomics data of tumour and matching control tissues and new MALDI-MS imaging data of tissue microarrays showed a strong cancer-associated elevation of oligomannosylation in both basal cell (p = 1.78 × 10–12) and squamous cell (p = 1.23 × 10–11) skin cancer and colorectal cancer (p = 8.0 × 10–4). The glycomics data also indicated that some cancer types including gastric and liver cancer exhibit unchanged or reduced oligomannose levels, observations also supported by literature and MALDI-MS imaging data. Finally, expression data from public cancer repositories indicated that several α1,2-mannosidases are regulated in tumour tissues suggesting that these glycan-processing enzymes may contribute to the cancer-associated modulation of oligomannosylation. This omics-centric study has compiled robust glycomics and enzyme expression data revealing interesting molecular trends that open avenues to better understand the role of oligomannosylation in human cancers.
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Affiliation(s)
| | - Julian Ugonotti
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | - Ling Y Lee
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | | | - Rebeca Kawahara
- Department of Molecular Sciences, Macquarie University, Sydney, Australia.,Joint senior authors
| | - Morten Thaysen-Andersen
- Department of Molecular Sciences, Macquarie University, Sydney, Australia.,Biomolecular Discovery Research Centre (BDRC), Macquarie University, Sydney, Australia.,Joint senior authors
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Ebrahimiyan H, Mostafaei S, Aslani S, Faezi ST, Farhadi E, Jamshidi A, Mahmoudi M. Association between complement gene polymorphisms and systemic lupus erythematosus: a systematic review and meta-analysis. Clin Exp Med 2021; 22:427-438. [PMID: 34519938 DOI: 10.1007/s10238-021-00758-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 08/21/2021] [Indexed: 11/26/2022]
Abstract
Complement dysfunction results in impaired ability in clearing apoptotic cell debris that may stimulate autoantibody production in systemic lupus erythematosus (SLE). Herein, we provided a comprehensive search to find and meta-analyze any complement gene polymorphisms associated with SLE. The ITGAM, C1q, and MBL gene polymorphisms were included in this meta-analysis to reveal the exact association with SLE risk. Electronic databases, including Scopus, PubMed, and Google Scholar, were searched to find studies investigating the ITGAM, C1q, and MBL gene polymorphisms and SLE risk in different populations. The pooled odds ratio (OR) and its corresponding 95% confidence interval (CI) were used to analyze the association between ITGAM, C1q, and MBL gene polymorphisms and susceptibility to SLE. According to inclusion criteria, a total of 24 studies, comprising 4 studies for C1QA rs292001, 5 studies for C1QA rs172378, 9 studies for ITGAM rs1143679, 8 studies for MBL rs1800450, 3 studies for MBL2 rs1800451, and 3 studies for MBL2 rs5030737, were included in the final meta-analysis. A significant positive association was found between rs1143679 and SLE risk, while rs1800451 significantly associated with decreased SLE susceptibility. In summary, ITGAM gene rs1143679 SNP and MBL gene rs1800451 SNP were positively and negatively associated with SLE risk, respectively.
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Affiliation(s)
- Hamidreza Ebrahimiyan
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Shayan Mostafaei
- Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Sorkheh-Ligeh Blvd, Kermanshah, Iran.
| | - Saeed Aslani
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
| | - Seyedeh Tahereh Faezi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran.
| | - Elham Farhadi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
- Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmadreza Jamshidi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
| | - Mahdi Mahmoudi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
- Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Gupta A, Gupta GS. Status of mannose-binding lectin (MBL) and complement system in COVID-19 patients and therapeutic applications of antiviral plant MBLs. Mol Cell Biochem 2021; 476:2917-2942. [PMID: 33745077 PMCID: PMC7981598 DOI: 10.1007/s11010-021-04107-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 02/11/2021] [Indexed: 02/07/2023]
Abstract
Coronavirus disease 2019 (COVID-19) is an infectious disease caused by a virus called "Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)." In the majority of patients, infection with COVID-19 may be asymptomatic or may cause only mild symptoms. However, in some patients, there can also be immunological problems, such as macrophage activation syndrome (CSS) that results in cytokine storm syndrome (CSS) and acute respiratory distress syndrome (ARDS). Comprehension of host-microbe communications is the critical aspect in the advancement of new therapeutics against infectious illnesses. Endogenous animal lectins, a class of proteins, may perceive non-self glycans found on microorganisms. Serum mannose-binding lectin (sMBL), as a part of the innate immune framework, recognizes a wide range of microbial microorganisms and activates complement cascade via an antibody-independent pathway. Although the molecular basis for the intensity of SARS-CoV-2 infection is not generally understood, scientific literature indicates that COVID-19 is correlated with unregulated activation of the complement in terms of disease severity. Disseminated intravascular coagulation (DIC), inflammation, and immune paralysis contribute to unregulated complement activation. Pre-existing genetic defects in MBL and their association with complement play a major role in immune response dysregulation caused by SARS-CoV-2. In order to generate anti-complement-based therapies in Covid-19, an understanding of sMBL in immune response to SARS-CoV-2 and complement is therefore essential. This review highlights the role of endogenous sMBL and complement activation during SARS-CoV-2 infection and their therapeutic management by various agents, mainly plant lectins, since antiviral mannose-binding plant lectins (pMBLs) offer potential applications in the prevention and control of viral infections.
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Affiliation(s)
- Anita Gupta
- Chitkara School of Health Sciences, Chitkara University, Rajpura, Punjab, India
| | - G S Gupta
- Department of Biophysics, Sector 25, Panjab University, Chandigarh, 160014, India.
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Immune-Related Urine Biomarkers for the Diagnosis of Lupus Nephritis. Int J Mol Sci 2021; 22:ijms22137143. [PMID: 34281193 PMCID: PMC8267641 DOI: 10.3390/ijms22137143] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/25/2021] [Accepted: 06/26/2021] [Indexed: 12/17/2022] Open
Abstract
The kidney is one of the main organs affected by the autoimmune disease systemic lupus erythematosus. Lupus nephritis (LN) concerns 30-60% of adult SLE patients and it is significantly associated with an increase in the morbidity and mortality. The definitive diagnosis of LN can only be achieved by histological analysis of renal biopsies, but the invasiveness of this technique is an obstacle for early diagnosis of renal involvement and a proper follow-up of LN patients under treatment. The use of urine for the discovery of non-invasive biomarkers for renal disease in SLE patients is an attractive alternative to repeated renal biopsies, as several studies have described surrogate urinary cells or analytes reflecting the inflammatory state of the kidney, and/or the severity of the disease. Herein, we review the main findings in the field of urine immune-related biomarkers for LN patients, and discuss their prognostic and diagnostic value. This manuscript is focused on the complement system, antibodies and autoantibodies, chemokines, cytokines, and leukocytes, as they are the main effectors of LN pathogenesis.
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Abstract
Purpose of Review Complement activation is a key event in the pathogenesis of tissue inflammation and injury in systemic lupus erythematosus (SLE). This review is aimed at comparing the usefulness of measurement of complement proteins in serum/plasma (C3, C4) to complement activation (split) products in plasma and on circulating blood cells for SLE diagnosis, disease monitoring, and prognosis. Recent Findings Complement split products, C3dg, iC3b, and C4d, are elevated in SLE, and C3dg/C3 and iC3b/C3 ratios correlate with active SLE. C4d also is higher in patients with lupus nephritis. An elevated level of the alternative pathway split product, Bb, in early lupus pregnancy is a predictor of adverse outcomes in SLE patients with antiphospholipid antibodies. Elevated levels of cell-bound complement activation products (CB-CAPs), namely, B cell-bound C4d (BC4d) and erythrocyte-bound C4d (EC4d), within a multiparameter assay panel, may predict transition to SLE more than other lupus biomarkers. EC4d better correlates with lupus disease activity than low plasma complement levels. Elevated platelet-bound C4d (PC4d) correlates with thrombosis in SLE. Both EC4d and PC4d are increased in primary and secondary anti-phospholipid syndrome, and anti-beta2glycoproteinI antibodies may directly activate the complement system. Summary Abnormal levels of plasma complement split products and CB-CAPs support complement activation as an important pathogenetic mechanism in SLE and the antiphospholipid syndromes. These tests show promise for the diagnosis of SLE and monitoring of disease activity.
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Affiliation(s)
- Arthur Weinstein
- Loma Linda University, Loma Linda, CA, USA. .,Georgetown University, Washington, DC, USA. .,Exagen Inc., Vista, CA, USA.
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Yuan ZC, Xu WD, Lan YY, Wang JM, Wu Q, Zhou J, Huang AF. Association of MBL2 gene polymorphisms and systemic lupus erythematosus susceptibility: A meta-analysis. Int J Rheum Dis 2020; 24:147-158. [PMID: 33146461 DOI: 10.1111/1756-185x.14017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/19/2020] [Accepted: 10/14/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Mannose binding lectin (MBL) gene single nucleotide polymorphisms have been associated with systemic lupus erythematosus (SLE) risk with inconsistent results. This study aimed to explore whether MBL2 A\B, A\C, A\D, A\O, L\H and Y\X polymorphisms affected SLE susceptibility. METHODS A meta-analysis was performed on 20 studies, containing allelic contrast, additive, dominant and recessive models. Odds ratio (OR) was calculated to reflect the effect of association. RESULTS A total of 64 pooled comparisons were conducted, including 7194 SLE patients and 7401 healthy controls. The meta-analysis inducted a significant association between allele B and SLE (OR = 0.766, 95% CI = 0.681-0.862, P < .001). The genotype BB in the additive model and AB + BB in the recessive model both reduced the risk of SLE (OR = 0.611, 95% CI = 0.422-0.882, P = .009; OR = 0.806, 95% CI = 0.688-0.944, P = .008). Regarding A\O polymorphisms, results revealed statistical differences in allelic contrast, additive model and recessive models (OR = 0.826, 95% CI = 0.732-0.931, P = .002; OR = 0.737, 95% CI = 0.557-0.977, P = .034 and OR = 0.793, 95% CI = 0.683-0.921, P = .002, respectively). As for L\H, meta-analysis revealed that allele H and genotype HH both decreased SLE susceptibility in allelic contrast and dominant models (OR = 1.463, 95% CI = 1.097-2.007, P = .018; OR = 1.383, 95% CI = 1.124-1.701, P = .002). Stratification by ethnicity indicated that allele H related to SLE in European populations (OR = 0.736, 95% CI = 0.617-0.879, P = .001), and the recessive model correlated with SLE in Asians (OR = 0.808, 95% CI = 0.667-0.979, P = .03). CONCLUSION The present study suggests that A\B and A\O polymorphisms were associated with SLE susceptibility, and the allele H may be a protective factor in SLE.
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Affiliation(s)
- Zhi-Chao Yuan
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, China
| | - Wang-Dong Xu
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, China
| | - You-Yu Lan
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, China
| | - Jia-Min Wang
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, China
| | - Qian Wu
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, China
| | - Jie Zhou
- Department of Evidence-Based Medicine, School of Public Health, Southwest Medical University, Luzhou, China
| | - An-Fang Huang
- Department of Rheumatology and Immunology, Affiliated Hospital of Southwest Medical University, Luzhou, China
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Mahto H, Pati A, Sahu SK, Sharma HP, Padhi A, Panda AK. Association of MBL-2 gene polymorphisms with systemic lupus erythematosus: an updated meta-analysis and trial sequential analysis. Lupus 2020; 29:1227-1237. [PMID: 32635881 DOI: 10.1177/0961203320939156] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Mannose-binding lectin (MBL), an essential innate immune molecule, enhances the opsonization process and activates the complement system. Genetic variations at the promoter and coding region of the MBL-2 gene have been associated with susceptibility to systemic lupus erythematosus (SLE); however, reports remained inconsistent. The present study performs a meta-analysis of published peer-reviewed articles to draw a definitive conclusion. MATERIALS AND METHODS Published peer-reviewed articles on the association of MBL-2 gene polymorphisms and SLE were screened on various databases such as PubMed (Medline), ScienceDirect, and Google Scholar. A total of 23 eligible articles were included in the present study, comprising 3074 SLE patients and 3985 controls. Genotype and/or allele data for MBL-2 polymorphisms (A > B, A > C, A > D, A > O, Y > X and H > L) were extracted and analyzed by Comprehensive Meta-Analysis software (CMA V3.1). RESULTS The overall analysis revealed a significant association of MBL-2 (A > O) polymorphism with a predisposition to SLE in allele contrast (p = 0.000; OR = 1.261), homozygous (p = 0.005; OR = 1.482), heterozygous (p = 0.004; OR = 1.247), dominant (p = 0.000; OR = 1.303) and recessive (p = 0.025; OR = 1.356) genetic comparison model. Similar results were also observed in the comparison of allele and the dominant genetic model of MBL-2 (A > B) polymorphism in overall (allele: p = 0.000, OR = 1.46, dominant: p = 0.001, OR = 1.31) and in the Asian cohorts (allele: p = 0.007, OR = 1.43, dominant: p = 0.008, OR = 1.32). Interestingly, MBL-2 (Y-221X) polymorphism exhibited protection against the development of SLE in heterozygous (p = 0.005, OR = 0.619) and dominant genetic comparison (p = 0.01, OR = 0.672) models. CONCLUSIONS MBL-2 variants (A > O and A > B) are associated with predisposition to SLE. Conversely, promoter polymorphism (Y-221X) offers protection against SLE development.
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Affiliation(s)
- Harishankar Mahto
- Department of Bioscience and Bioinformatics, Khallikote University, Transit Campus: GMax Building, Konisi, Berhampur, Odisha, India.,Department of Botany, Ranchi University, Ranchi, Jharkhand, India
| | - Abhijit Pati
- Department of Bioscience and Bioinformatics, Khallikote University, Transit Campus: GMax Building, Konisi, Berhampur, Odisha, India
| | - Sushil K Sahu
- Department of Zoology, Ravenshaw University, Cuttack, Odisha, India
| | | | - Archana Padhi
- Department of Biology, K. C. Public School, Berhampur, Odisha, India
| | - Aditya K Panda
- Department of Bioscience and Bioinformatics, Khallikote University, Transit Campus: GMax Building, Konisi, Berhampur, Odisha, India
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Bhargava S, Becker N, Kroumpouzos G. Atypical Clinical Presentation of Hidradenitis Suppurativa in a Patient with Severe Mannose-Binding Lectin Deficiency. Case Rep Dermatol 2020; 12:83-91. [PMID: 32508615 PMCID: PMC7250386 DOI: 10.1159/000507539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/26/2020] [Indexed: 12/18/2022] Open
Abstract
Mannose-binding lectin (MBL) deficiency is associated with recurrent infections, autoimmune and inflammatory skin disease, and vascular complications. MBL deficiency is not a recognized comorbidity in hidradenitis suppurativa (HS); the latter is associated with the group of autoinflammatory disorders. A 32-year-old woman presented with a history of recurrent painful, deep-seated abscesses and pustular lesions since the age of 13 years. Lesions were noted predominantly in HS distribution, i.e., submammary, inguinal, and perianal areas were affected. However, unusual locations (jawlines, neck) were also affected. The patient fulfilled the clinical criteria for HS but the presentation was atypical because lesions were noted in unusual locations, most lesions were in Hurley stage 1 (sparsity of sinus tracts and scarring), and most cultures from abscesses and pustular lesions were negative. The excruciating pain caused by constantly developing abscesses had a profound impact on the patient's quality of life. Laboratory workup showed an exceptionally low serum MBL level. Treatment was challenging with only a temporary, mild response to oral antibiotic therapy and no response to immunosuppressive and hormonal therapies. This atypical HS presentation may reflect an enhancement of proinflammatory mechanisms. Health care providers should be aware of this clinicopathologic presentation so that the establishment of HS diagnosis is not delayed and the patient receives appropriate counseling.
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Affiliation(s)
- Shashank Bhargava
- Department of Dermatology, R.D. Gardi Medical College, Ujjain, India
| | | | - George Kroumpouzos
- Department of Dermatology, Alpert Medical School, Brown University, Providence, Rhode Island, USA
- GK Dermatology, PC, South Weymouth, Massachusetts, USA
- Department of Dermatology, Medical School of Jundiaí, São Paulo, Brazil
- *George Kroumpouzos, MD, PhD, FAAD, Department of Dermatology, Alpert Medical School, Brown University, Rhode Island Hospital, APC 10, 593 Eddy Street, Providence, RI 02903 (USA),
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11
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Kieninger-Gräfitsch A, Vogt S, Ribi C, Dubler D, Chizzolini C, Huynh-Do U, Osthoff M, Trendelenburg M. No association of complement mannose-binding lectin deficiency with cardiovascular disease in patients with Systemic Lupus Erythematosus. Sci Rep 2020; 10:3693. [PMID: 32111865 PMCID: PMC7048794 DOI: 10.1038/s41598-020-60523-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 02/10/2020] [Indexed: 11/09/2022] Open
Abstract
Cardiovascular (CV) morbidity is the major cause of death in patients with Systemic Lupus Erythematosus (SLE). Previous studies on mannose-binding lectin (MBL) gene polymorphisms in SLE patients suggest that low levels of complement MBL are associated with cardiovascular disease (CVD). However, as large studies on MBL deficiency based on resulting MBL plasma concentrations are lacking, the aim of our study was to analyze the association of MBL concentrations with CVD in SLE patients. Plasma MBL levels SLE patients included in the Swiss SLE Cohort Study were quantified by ELISA. Five different CV organ manifestations were documented. Of 373 included patients (85.5% female) 62 patients had at least one CV manifestation. Patients with MBL deficiency (levels below 500 ng/ml or 1000 ng/ml) had no significantly increased frequency of CVD (19.4% vs. 15.2%, P = 0.3 or 17.7% vs. 15.7%, P = 0.7). After adjustment for traditional CV risk factors, MBL levels and positive antiphospholipid serology (APL+) a significant association of CVD with age, hypertension, disease duration and APL+ was demonstrated. In our study of a large cohort of patients with SLE, we could not confirm previous studies suggesting MBL deficiency to be associated with an increased risk for CVD.
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Affiliation(s)
- A Kieninger-Gräfitsch
- Division of Internal Medicine and Clinical Immunology Lab, Department of Biomedicine, University Hospital and University, Basel, Switzerland.
| | - S Vogt
- Division of Internal Medicine and Clinical Immunology Lab, Department of Biomedicine, University Hospital and University, Basel, Switzerland
| | - C Ribi
- Department of Immunology and Allergy, University Hospital, Lausanne, Switzerland
| | - D Dubler
- Division of Internal Medicine and Clinical Immunology Lab, Department of Biomedicine, University Hospital and University, Basel, Switzerland
| | - C Chizzolini
- Department of Internal Medicine Specialties, Clinical Immunology and Allergy, University Hospital and School of Medicine, Geneva, Switzerland
| | - U Huynh-Do
- Department of Nephrology and Hypertension, University Hospital, Bern, Switzerland
| | - M Osthoff
- Division of Internal Medicine and Clinical Immunology Lab, Department of Biomedicine, University Hospital and University, Basel, Switzerland
| | - M Trendelenburg
- Division of Internal Medicine and Clinical Immunology Lab, Department of Biomedicine, University Hospital and University, Basel, Switzerland
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12
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Casals C, García-Fojeda B, Minutti CM. Soluble defense collagens: Sweeping up immune threats. Mol Immunol 2019; 112:291-304. [DOI: 10.1016/j.molimm.2019.06.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 06/12/2019] [Accepted: 06/13/2019] [Indexed: 12/14/2022]
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Ulrich-Merzenich G, Hausen A, Zeitler H, Goldmann G, Oldenburg J, Pavlova A. The role of variant alleles of the mannose-binding lectin in the inhibitor development in severe hemophilia A. Thromb Res 2019; 179:140-146. [PMID: 31141731 DOI: 10.1016/j.thromres.2019.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/08/2019] [Accepted: 05/06/2019] [Indexed: 02/06/2023]
Abstract
INTRODUCTION The administration of FVIII leads to inhibitors in up to 30% of patients with hemophilia A (HA), the most severe treatment complication. FVIII-mannosylation fosters the presentation of FVIII to CD4+-T-lymphocytes. Mannose as primary ligand for the mannose-binding lectin (MBL) activates the lectin pathway of complement. MBL2 single nucleotide polymorphisms (SNPs) lead to low peripheral MBL concentrations that may hamper the removal of mannosylated FVIII. OBJECTIVE Investigation of the association between the inhibitor development in hemophilia A and MBL2-SNPs. METHODS In a case-control study the MBL2-SNPs in exon 1 at codons 52, 54 and 57 (C, B, D-Alleles respectively) were determined in 237 patients with severe hemophilia A with and without inhibitors to FVIII (119 vs 118). The association of MBL2-SNPs and the -308 G>A TNF-α-polymorphism with the presence of inhibitors were determined. RESULTS In the inhibitor group higher frequencies of the B allele (codon 54) (OR: 1.77, P < 0.05) were present. Summarising the MBL2 SNPs (alleles B, C and D) as 0, the 0/0 type occurred only in the inhibitor group (frequencies: 0.08 vs 0, P = 0.003). Based on the genetic background a functional immune response phenotype was determined. 11.8% of patients with inhibitors were of the low MBL/high TNF-α phenotype vs 0.03% of the non-inhibitor patients (OR: 3.71). CONCLUSION Data suggest an association of MBL2-SNPs alone or combined with the 308-TNF-α polymorphism in the inhibitor development. Investigations of components of all three complement pathways are required to comprehend their individual and overall contribution to the inhibitor development in HA.
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Affiliation(s)
- Gudrun Ulrich-Merzenich
- Medical Clinic III, University Hospital Bonn, Centre for Internal Medicine, Sigmund-Freud Street 25, D-53127 Bonn, Germany.
| | - Annekristin Hausen
- Medical Clinic I, University Hospital Bonn, Centre for Internal Medicine, Sigmund-Freud Street 25, D-53127 Bonn, Germany.
| | - Heike Zeitler
- Medical Clinic I, University Hospital Bonn, Centre for Internal Medicine, Sigmund-Freud Street 25, D-53127 Bonn, Germany.
| | - Georg Goldmann
- Institute of Experimental Haematology and Transfusion Medicine, University Hospital Bonn, Sigmund-Freud Street 25, D-53127 Bonn, Germany.
| | - Johannes Oldenburg
- Institute of Experimental Haematology and Transfusion Medicine, University Hospital Bonn, Sigmund-Freud Street 25, D-53127 Bonn, Germany.
| | - Anna Pavlova
- Institute of Experimental Haematology and Transfusion Medicine, University Hospital Bonn, Sigmund-Freud Street 25, D-53127 Bonn, Germany.
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Cildag S, Kara Y, Cakir E, Cildag MB, Senturk T. Comparison of Clinical and Laboratory Findings in Patients with Systemic Lupus Erythematosus with Regard to Age at Onset. Eurasian J Med 2019; 51:17-21. [PMID: 30911250 DOI: 10.5152/eurasianjmed.2018.18022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/22/2018] [Indexed: 12/18/2022] Open
Abstract
Objective Systemic lupus erythematosus (SLE) rarely has a late onset. Late-onset SLE (LSLE) has a milder course and less organ involvement. The purpose of the present study was to compare the clinical and laboratory (lab) findings of SLE regarding age at onset. Materials and Methods Seventy-two patients with SLE were included in the study. The age at onset was considered adult-onset SLE (ASLE) if it was <50 years and LSLE if it was ≥50 years. Lab parameters and clinical findings were compared accordingly. Results Overall, 41 (56.9%) patients had ASLE, and 31 (43.05%) patients had LSLE based on the age at onset. The ratio of female-to-male patients was higher in ASLE, and no significant difference was found with regard to gender distribution (12.6:1 and 5.2:1 for ASLE and LSLE, respectively; p=0.239). While malar rash and fever were more common in ASLE, no difference was found regarding the other clinical findings. Only IgG anti-cardiolipin was more common in LSE between the lab parameters. Conclusion Although it is known that LSLE has a milder course and less organ involvement, there are differences in clinical and lab findings and organ involvement in various studies. The results of our study showed no significant difference in organ involvement between ASLE and LSLE.
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Affiliation(s)
- Songul Cildag
- Department of Immunology-Rheumatology, Adnan Menderes University School of Medicine, Aydın, Turkey
| | - Yasemin Kara
- Department of Immunology-Rheumatology, Adnan Menderes University School of Medicine, Aydın, Turkey
| | - Ersin Cakir
- Department of Internal Medicine, Adnan Menderes University School of Medicine, Aydın, Turkey
| | - Mehmet Burak Cildag
- Department of Radiology, Adnan Menderes University School of Medicine, Aydın, Turkey
| | - Taskin Senturk
- Department of Immunology-Rheumatology, Adnan Menderes University School of Medicine, Aydın, Turkey
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15
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Abstract
INTRODUCTION Systemic lupus erythematosus (SLE) is a multi-system autoimmune disease. There are three drugs licensed for the treatment of lupus: corticosteroids, hydroxychloroquine and belimumab. Immunosuppressants such as azathioprine, methotrexate and mycophenolate are also used. Despite these treatments there is still considerable morbidity. New treatments are needed for the management of active lupus. Epratuzumab a humanized IgG1 monoclonal antibody that targets CD22 resulting in selective B cell modulation that has been considered a potential treatment for SLE. Areas covered: Summary of the relevant pathogenesis and disease activity measurements used in SLE patients, current treatments and unmet needs in SLE, pharmacokinetics and pharmacodynamics of epratuzumab therapy, and a summary of the 7 clinical trials that have investigated the efficacy and safety of epratuzumab in SLE. Expert commentary: It is not clear why trials have failed to demonstrate efficacy but high placebo response rates from optimisation of standard of care and a sub-optimal dosing regimen may have played a role. Post-hoc analysis suggested that there may be subgroups that did respond, such as anti-SSA positive patients with features of Sjogren's syndrome. Further research is needed to explore this and other potential sub-groups that might respond.
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Affiliation(s)
- Daniel Geh
- a Rheumatology Department , City Hospital, Sandwell and West Birmingham Hospitals NHS Trust , Birmingham , UK.,b University of Birmingham Research Labs , University Hospitals Birmingham NHS Foundation Trust , Birmingham , UK
| | - Caroline Gordon
- a Rheumatology Department , City Hospital, Sandwell and West Birmingham Hospitals NHS Trust , Birmingham , UK.,b University of Birmingham Research Labs , University Hospitals Birmingham NHS Foundation Trust , Birmingham , UK.,c Rheumatology Research Group, Institute of Inflammation and Ageing, College of Medical and Dental Sciences , University of Birmingham , Birmingham , UK
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Didel S, Suri D, Rawat A, Singh S. Functional mannose binding lectin levels in patients with pediatric onset systemic lupus erythematosus in remission. Int J Rheum Dis 2018; 21:710-715. [PMID: 29314753 DOI: 10.1111/1756-185x.13249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Complement system plays a crucial role in the pathogenesis of systemic lupus erythematosus (SLE). Excessive activation of complement causes tissue injury and SLE occurrence is typically associated with congenital deficiencies of the early components of the classical complement pathway. Mannose-binding lectin (MBL) is recognized as important causative factor in the etio-pathogenesis of SLE and MBL-2 gene has evolved as a candidate gene for SLE susceptibility. AIM This study was done to assess the functional MBL (fMBL) level in SLE patients in remission and its co-relation with disease severity and outcome. METHODS Functional MBL levels were compared with age and sex matched healthy controls and were correlated with duration of illness,complement levels and anti-double- stranded DNA antibody levels. RESULTS Mean fMBL level in patients was found to be 696.19 ± 408.98 U/mL and 579.52 ± 393.87 U/mL in the control group. Four children had very low fMBL levels (< 40 U/mL). Functional MBL levels were higher in patients with SLE even when the disease was in remission as compared to healthy controls, although not statistically significant. CONCLUSION Large variation exists in fMBL levels in patients with SLE even when in remission. Very low fMBL levels were found in some children with younger age of onset of SLE, multisystem involvement and severe course of the disease. Positive correlation of MBL levels with anti-ds DNA titers suggest that its values vary with activity and could be a potential biomarker of the disease.
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Affiliation(s)
- Siyaram Didel
- Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Deepti Suri
- Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Amit Rawat
- Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Surjit Singh
- Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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17
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Mannose-binding lectin (MBL) deficiency and tuberculosis infection in patients with ankylosing spondylitis. Clin Rheumatol 2017; 37:555-558. [PMID: 28879439 DOI: 10.1007/s10067-017-3813-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/28/2017] [Accepted: 08/30/2017] [Indexed: 12/16/2022]
Abstract
Ankylosing spondylitis (AS) patients may have higher prevalence of mannose-binding lectin (MBL) deficiency than normal individuals. MBL deficiency may influence susceptibility to infections. The aim of the study was to verify if MBL deficiency in patients with AS predisposes to infections. We studied 60 patients with AS diagnosed according to the Assessment of SpondyloArthritis international Society (ASAS) criteria. These patients had their MBL serum levels determinated. Twenty-five individuals were identified as MBL deficient (serum values 100 ng/mL). These patients were paired with 35 "sufficient" MBL producers (median serum level = 700 ng/mL; range 150-4100 ng/mL) for gender, age, use of medications, and tobacco exposure. Medical records of all patients were retrospectively investigated for the period of 5 years and the rate of infection occurrence was compared in the two groups. AS patients with MBL deficiency had higher number of urinary tract infections (p = 0.03; IRR = 2.33; 95% CI = 0.95-6.04) and tuberculosis (p = 0.008; IRR = 9.8; 95% CI = 1.2-441.6) than controls. Regarding tuberculosis infection, one patient (2.8%) in the MBL-sufficient group and six (24.0%) from the deficient group had this infection. The MBL-sufficient patient and five from the deficient group have had latent infections, detected in the screening tests done previous to anti-TNF drug use. The other, in the deficient group, had lung infection while not on anti-TNF treatment. Another patient, from the deficient group, has had tuberculosis skeletal infection in the past. We found a significant association between MBL deficiency and higher risk of tuberculosis and urinary tract infection in patients with AS. More studies with higher number of patients are needed to confirm this finding.
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18
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Cieslinski JZ, Skare TL, Nisihara R, De Messias-Reason IJ, Utiyama SRR. Mannose-binding lectin serum levels in patients with systemic lupus erythematosus: association with thrombocytopaenia and seizure. Lupus 2017; 27:372-379. [PMID: 28786770 DOI: 10.1177/0961203317722846] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The complement system contributes to the pathogenesis of systemic lupus erythematosus (SLE). Mannose-binding lectin (MBL) is a key molecule of the lectin pathway of complement and seems to be related to the clinical manifestations of this disease. We evaluated the serum levels of MBL and its relationship with disease onset and clinical findings in SLE patients. Serum samples were analysed in 195 patients and 145 healthy controls from southern Brazil. Patients with high MBL levels (above 2000 ng/ml) showed a significant increase in the frequency of thrombocytopaenia ( p = 0.007; OR = 2.71; 95% CI = 1.32-5.55); and seizures ( p = 0.034; OR = 2.61; 95% CI = 1.07-6.37). A positive correlation between disease activity and MBL levels (>2000 ng/ml; p = 0.031, rho = 0.279) as well as of MBL concentration with accumulated organ damage ( p = 0.021; rho = 0.232) was observed. Our results suggest a role for MBL in the development of clinical manifestations such as thrombocytopaenia and seizures in SLE patients. These findings corroborate the participation of the lectin pathway of complement in the pathophysiologic mechanisms underlying clinical manifestations of SLE.
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Affiliation(s)
- J Z Cieslinski
- 1 Laboratory of Immunopathology, Clinical Hospital, Federal University of Paraná, Curitiba, Brazil
| | - T L Skare
- 2 Rheumatology Clinic, Evangelical University Hospital of Curitiba, Curitiba, Brazil
| | - R Nisihara
- 1 Laboratory of Immunopathology, Clinical Hospital, Federal University of Paraná, Curitiba, Brazil.,3 Department of Medicine, Positivo University, Curitiba, Brazil
| | - I J De Messias-Reason
- 1 Laboratory of Immunopathology, Clinical Hospital, Federal University of Paraná, Curitiba, Brazil
| | - S R R Utiyama
- 1 Laboratory of Immunopathology, Clinical Hospital, Federal University of Paraná, Curitiba, Brazil.,4 Department of Clinical Analysis, Federal University of Paraná, Curitiba, Brazil
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Vignesh P, Rawat A, Sharma M, Singh S. Complement in autoimmune diseases. Clin Chim Acta 2017; 465:123-130. [PMID: 28040558 DOI: 10.1016/j.cca.2016.12.017] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/15/2016] [Accepted: 12/17/2016] [Indexed: 12/18/2022]
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20
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Negi VS, Devaraju P, Misra DP, Jain VK, Usdadiya JB, Antony PT, Gulati R. Mannose-binding lectin (MBL) codon 54 (rs1800450) polymorphism predisposes towards medium vessel vasculitis in patients with systemic lupus erythematosus. Clin Rheumatol 2017; 36:837-843. [DOI: 10.1007/s10067-017-3539-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 12/21/2016] [Accepted: 01/10/2017] [Indexed: 12/18/2022]
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21
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Glesse N, Vianna P, Paim LMG, Matte MCC, Aguiar AKK, Palhano PL, Monticielo OA, Brenol CV, Xavier RM, Chies JAB. Evaluation of polymorphic variants in apoptotic genes and their role in susceptibility and clinical progression to systemic lupus erythematosus. Lupus 2016; 26:746-755. [PMID: 27909160 DOI: 10.1177/0961203316678671] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Systemic lupus erythematosus (SLE) is an autoimmune disease marked by the disruption of the immune homeostasis. Patients exhibit a wide range of clinical manifestations, and environmental and genetic factors are involved in SLE pathogenesis. Evidence suggests that abnormalities in the cellular and molecular events that coordinate apoptosis may favour the generation of autoantigens involved in autoimmunity. In this way, the apoptotic deregulation may be affected by polymorphic variants in apoptotic-related genes. Methods We analyzed FAS, FASL, BCL-2 and BAX polymorphisms in order to correlate to SLE susceptibility and clinical features. A total of 427 SLE patients from the Hospital de Clínicas de Porto Alegre and 543 controls from southern Brazil were evaluated. Results We observed higher frequencies of the FASL -844CC genotype and -844C allele, as well as of the FASL-844C/IVS2nt-124A haplotype in African-derived SLE patients when compared to controls ( P < 0.001). FASL -844C, which is related to high FasL expression, could contribute to increased apoptosis and to the breakdown of immunological tolerance, favouring autoantibody production and inflammation. On the other hand, the BAX -248GA genotype and the -248A allele , related to low protein expression, were observed as a protective factor against SLE in this same population. The rate of apoptosis and cell death was evaluated in peripheral lymphocytes, and SLE patients presented a higher percentage of dead lymphocytes (CD3+Annexin V+ 7-AAD+) compared to the control group. Conclusion Our data support a role for apoptosis in SLE susceptibility.
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Affiliation(s)
- N Glesse
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - P Vianna
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - L M G Paim
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - M C C Matte
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A K K Aguiar
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - P L Palhano
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - O A Monticielo
- 2 Division of Rheumatology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - C V Brenol
- 2 Division of Rheumatology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - R M Xavier
- 2 Division of Rheumatology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - J A B Chies
- 1 Laboratory of Immunogenetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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22
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Sassi RH, Hendler JV, Piccoli GF, Gasparin AA, da Silva Chakr RM, Brenol JCT, Monticielo OA. Age of onset influences on clinical and laboratory profile of patients with systemic lupus erythematosus. Clin Rheumatol 2016; 36:89-95. [PMID: 27858177 DOI: 10.1007/s10067-016-3478-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 10/12/2016] [Accepted: 11/07/2016] [Indexed: 02/06/2023]
Abstract
The present study aims to evaluate differences in clinical and laboratory manifestations and medication use in the different ages of disease onset in patients with systemic lupus erythematosus (SLE). This cross-sectional study consisted of 598 SLE patients (550 female and 48 male), who attended the Rheumatology Clinic of the Hospital de Clínicas de Porto Alegre between 2003 and 2015. Demographic, clinical and laboratory data were collected. The patients were classified into three groups according to their ages at disease diagnosis. Mean age of diagnosis was 33.6 ± 14.3 years, and the median (25th-75th percentile) disease duration was 13 (7-20) years. Among the patients studied, 419 (70%) were adult-onset (aSLE), 90 (14.8%) were late-onset (lSLE) and 89 (14.8%) were childhood-onset (cSLE). The female to male ratio was higher in aSLE (18:1) compared to the other groups (p = 0.001). Arthritis was predominantly found in aSLE (78.5%) when compared with lSLE (57.7%) (p < 0.001). Nephritis was more common in cSLE (60.6%) than in lSLE (26.6%) (p < 0.001). Median (25th-75th percentile) of SLE disease activity index (SLEDAI) was higher in the cSLE group [2 (0-5)] when compared to the lSLE group [0 (0-4)] (p = 0.045). Childhood-onset SLE showed a more severe disease due to the higher incidence of nephritis and needed a more aggressive treatment with immunosuppressive drugs.
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Affiliation(s)
- Rafael Hennemann Sassi
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil
| | - Jordana Vaz Hendler
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil
| | - Giovana Fagundes Piccoli
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil
| | - Andrese Aline Gasparin
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil
| | - Rafael Mendonça da Silva Chakr
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil
| | - João Carlos Tavares Brenol
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil
| | - Odirlei André Monticielo
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul UFRGS, Rua Ramiro Barcelos, 2350, 645, Porto Alegre, 90035-003, Brazil.
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Losada López I, García Gasalla M, González Moreno J, Serrano A, Domínguez Valdés FJ, Milà J, Payeras A. Mannose binding lectin polymorphisms in systemic lupus erythematosus in Spain. EUR J INFLAMM 2016. [DOI: 10.1177/1721727x16646385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Low mannose binding lectin (MBL) producer genotypes have been considered as a systemic lupus erythematosus (SLE) risk factor. The aim of this study was to explore whether polymorphisms in the MBL gene are associated with susceptibility to SLE and disease-specific clinical manifestations or with disease severity in SLE patients in Son Llàtzer Hospital. MBL2 exon 1 and promoter polymorphisms were genotyped and MBL plasma levels were quantified by ELISA in 39 SLE cases and in 96 healthy controls. High MBL producer genotypes HYPA and LXPA were the most frequent haplotypes (65 and 62 participants, respectively). LYQC/HYPD, LXPA/LYQC and LYPB/HYPD were only found in SLE, and all of them were related to severe MBL deficiency. SLE patients showed a trend towards more severe MBL deficiency (MBL <100 ng/mL) compared to controls (10 [25.6%] and 11 [11.46%] respectively, P = 0.07). The wild-type genotype was more frequent in controls compared to SLE. The trend towards more severe MBL deficiency in SLE and the fact that some of the low-MBL producer genotypes were only found in SLE patients, suggest that low MBL levels or MBL2 variant could be a risk factor for the development of SLE.
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Affiliation(s)
| | | | | | - Araceli Serrano
- Internal Medicine, Son Llàtzer Hospital, Balearic Islands, Spain
| | | | - Joan Milà
- Immunology, Son Espases Hospital, Balearic Islands, Spain
| | - Antoni Payeras
- Internal Medicine, Son Llàtzer Hospital, Balearic Islands, Spain
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Perazzio SF, Silva NPD, Carneiro-Sampaio M, Andrade LEC. Mild and moderate Mannose Binding Lectin deficiency are associated with systemic lupus erythematosus and lupus nephritis in Brazilian patients. REVISTA BRASILEIRA DE REUMATOLOGIA 2016; 56:220-7. [PMID: 27267640 DOI: 10.1016/j.rbre.2016.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 09/17/2015] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE The potential association of mannose binding lectin (MBL) deficiency and systemic lupus erythematosus (SLE) has been investigated in several studies, but results have been mixed. One explanation for the conflicting results could be differences in ethnic background of study subjects. In this study we investigated the association of MBL deficiency and SLE in a large cohort of Brazilian SLE patients and controls. METHODS Serum MBL and Complement levels were determined for 286 Brazilian adult SLE patients and 301 healthy Brazilian adults as controls. MBL deficiency was classified as mild (<1000 and ≥500μg/L), moderate (<500 and ≥100μg/L) or severe (<100μg/L). RESULTS SLE patients presented higher frequency of mild and moderate MBL deficiency compared to controls. SLE patients with MBL deficiency presented higher frequency of lupus nephritis compared to those without MBL deficiency. MBL deficiency was not associated with any other clinical manifestation, use of immunosuppressant therapy, disease activity, disease severity serum or Complement levels. CONCLUSION This study shows that an association between MBL deficiency and SLE does exist in the Brazilian population. We also found an association between MBL deficiency and lupus nephritis. These findings support the hypothesis that MBL deficiency contributes to the development of SLE and lupus nephritis.
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Affiliation(s)
- Sandro Félix Perazzio
- Division of Rheumatology, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil; Grupo Fleury, São Paulo, SP, Brazil
| | - Neusa Pereira da Silva
- Division of Rheumatology, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Magda Carneiro-Sampaio
- Department of Pediatrics, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Luis Eduardo Coelho Andrade
- Division of Rheumatology, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil; Grupo Fleury, São Paulo, SP, Brazil.
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25
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Perazzio SF, Silva NPD, Carneiro‐Sampaio M, Andrade LEC. As deficiências leve e moderada de lectina ligadora de manose estão associadas ao lúpus eritematoso sistêmico e à nefrite lúpica em pacientes brasileiros. REVISTA BRASILEIRA DE REUMATOLOGIA 2016. [DOI: 10.1016/j.rbr.2015.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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26
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Wang FM, Song D, Pang Y, Song Y, Yu F, Zhao MH. The dysfunctions of complement factor H in lupus nephritis. Lupus 2016; 25:1328-40. [PMID: 27068115 DOI: 10.1177/0961203316642307] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 02/18/2016] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Our previous study showed that plasma levels of factor H (FH) were significantly decreased in patients with lupus nephritis and reflected lupus nephritis activity. The aim of this study was to further investigate in vitro biofunctions of plasma FH in patients with lupus nephritis. METHODS FH was purified from the first run of plasma exchange in four active lupus nephritis patients and two non-renal involvement systemic lupus erythematosus (SLE) patients, and plasma from two healthy controls. Then, the biofunctions of the purified FH were analyzed. In addition, FH exons sequencing analysis was performed. RESULTS Homogeneous FH was purified from the plasma fractions and the purity of the purified FH was comparable to the commercial FH. The abilities of FH binding with C3b and mCRP, and its protecting abilities from the lysis of sheep erythrocytes, from No. 3 and No. 4 lupus nephritis patients, decreased significantly compared with those in normal controls. The purified FH from lupus nephritis patients Nos. 2-4 could not induce the phagocytosis of late apoptotic cells significantly compared with normal controls. All four lupus nephritis patients had the known SNP rs1061147 (SCR5, A307A), rs1061170 (SCR7, Y402H), CM050194 (SCR20, S1191W) and CM010322 (SCR20, V1197A), which might be associated with the above dysfunctions. CONCLUSIONS Dysfunctions of FH, including the regulations of complement alternative pathway and the clearance of apoptotic cells, were found in some active lupus nephritis patients, which were associated with their clinical phenotypes. The FH SNPs might contribute to the dysfunctions of FH in patients with lupus nephritis.
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Affiliation(s)
- F-M Wang
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University, PR China Key Laboratory of Renal Disease, Ministry of Health of China, PR China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, PR China Institute of Nephrology, Zhongda Hospital, Southeast University, Nanjing, PR China
| | - D Song
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University, PR China Key Laboratory of Renal Disease, Ministry of Health of China, PR China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, PR China
| | - Y Pang
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University, PR China Key Laboratory of Renal Disease, Ministry of Health of China, PR China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, PR China
| | - Y Song
- Department of Nephrology, the First Affiliated Hospital of Chinese PLA General Hospital, Beijing, PR China
| | - F Yu
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University, PR China Key Laboratory of Renal Disease, Ministry of Health of China, PR China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, PR China Department of Nephrology, Peking University International Hospital, Beijing, PR China
| | - M-H Zhao
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University, PR China Key Laboratory of Renal Disease, Ministry of Health of China, PR China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, PR China Peking-Tsinghua Center for Life Sciences, Beijing, PR China
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Pradhan V, Surve P, Rajadhyaksha A, Rajendran V, Patwardhan M, Umare V, Ghosh K, Nadkarni A. Mannose binding lectin (MBL) 2 gene polymorphism & its association with clinical manifestations in systemic lupus erythematosus (SLE) patients from western India. Indian J Med Res 2016; 141:199-204. [PMID: 25900955 PMCID: PMC4418156 DOI: 10.4103/0971-5916.155558] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background & objectives: Systemic lupus erythematosus (SLE) is a prototypical autoimmune disease characterized by production of autoantibodies. Mannose binding lectin (MBL) is an important element of the innate defense system. The present study was undertaken to determine whether variant alleles in MBL2 gene were associated with disease severity in SLE patients. Methods: The MBL alleles [-550, -221, +4, Codon 52, Codon 54 and Codon 57] were studied by PCR- RFLP (restriction fragment length polymorphism) method in 100 SLE patients fulfilling ACR (American College of Rheumatology) criteria along with 100 healthy controls. SLE disease activity was evaluated using SLE Disease Activity Index (SLEDAI) score. Results: Homozygosity for MBL variant allele (O/O) was observed in 24 per cent of the SLE patients compared to 16 per cent of the normal controls, while no difference was found for heterozygosity (A/O) (37 vs 35%). A significant difference was reported in incidence of double heterozygosity for mutant allele B and D (B/D) among SLE patients as against control group (P = 0.015). MBL genotypes did not show any association with renal involvement. Interpretation & conclusions: In this study from western India, MBL gene polymorphism showed an influence as a possible risk factor for susceptibility to SLE, but had no direct effect on disease characteristics. Further studies need to be done on a larger number of SLE patients in different regions of the country.
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Affiliation(s)
| | | | | | | | | | | | | | - Anita Nadkarni
- National Institute of Immunohaematology (ICMR) , King Edward Memorial Hospital, Mumbai, India
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Troldborg A, Thiel S, Jensen L, Hansen S, Laska MJ, Deleuran B, Jensenius JC, Stengaard-Pedersen K. Collectin liver 1 and collectin kidney 1 and other complement-associated pattern recognition molecules in systemic lupus erythematosus. Clin Exp Immunol 2015; 182:132-8. [PMID: 26154564 PMCID: PMC4608502 DOI: 10.1111/cei.12678] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 07/02/2015] [Accepted: 07/03/2015] [Indexed: 11/30/2022] Open
Abstract
The objective of this study was to explore the involvement of collectin liver 1 (CL-L1) and collectin kidney 1 (CL-K1) and other pattern recognition molecules (PRMs) of the lectin pathway of the complement system in a cross-sectional cohort of systemic lupus erythematosus (SLE) patients. Concentrations in plasma of CL-L1, CL-K1, mannan-binding lectin (MBL), M-ficolin, H-ficolin and L-ficolin were determined in 58 patients with SLE and 65 healthy controls using time-resolved immunoflourometric assays. The SLE patients' demographic, diagnostic, clinical and biochemical data and collection of plasma samples were performed prospectively during 4 months. CL-L1, CL-K1 and M-ficolin plasma concentrations were lower in SLE patients than healthy controls (P-values < 0.001, 0.033 and < 0.001, respectively). H-ficolin concentration was higher in SLE patients (P < 0.0001). CL-L1 and CL-K1 plasma concentrations in the individuals correlated in both patients and controls. Patients with low complement component 3 (C3) demonstrated a negative correlation between C3 and CL-L1 and CL-K1 (P = 0.022 and 0.031, respectively). Patients positive for anti-dsDNA antibodies had lower levels of MBL in plasma than patients negative for anti-dsDNA antibodies (P = 0.02). In a cross-sectional cohort of SLE patients, we found differences in the plasma concentrations of CL-L1, CL-K1, M-ficolin and H-ficolin compared to a group of healthy controls. Alterations in plasma concentrations of the PRMs of the lectin pathway in SLE patients and associations to key elements of the disease support the hypothesis that the lectin pathway plays a role in the pathogenesis of SLE.
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Affiliation(s)
- A Troldborg
- Center of Cancer and InflammationDepartment of Rheumatology, Aarhus University Hospital, Aarhus University
- Institute of Clinical Medicine, Aarhus University
| | - S Thiel
- Department of Biomedicine, Aarhus University
| | - L Jensen
- Department of Biomedicine, Aarhus University
| | - S Hansen
- Department of Cancer and Inflammation Research, University of Southern Denmark
| | - M J Laska
- Department of Biomedicine, Aarhus University
| | - B Deleuran
- Center of Cancer and InflammationDepartment of Rheumatology, Aarhus University Hospital, Aarhus University
- Department of Biomedicine, Aarhus University
| | | | - K Stengaard-Pedersen
- Center of Cancer and InflammationDepartment of Rheumatology, Aarhus University Hospital, Aarhus University
- Institute of Clinical Medicine, Aarhus University
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Tam RCY, Lee ALH, Yang W, Lau CS, Chan VSF. Systemic Lupus Erythematosus Patients Exhibit Reduced Expression of CLEC16A Isoforms in Peripheral Leukocytes. Int J Mol Sci 2015; 16:14428-40. [PMID: 26121298 PMCID: PMC4519850 DOI: 10.3390/ijms160714428] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 05/28/2015] [Accepted: 06/15/2015] [Indexed: 02/06/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is a prototypic autoimmune disease with multiple etiological factors. The SLE susceptibility locus on chromosome 16p13 encodes a novel gene CLEC16A and its functional relationship with SLE is unclear. This study aimed to investigate the expression correlation of the two major CLEC16A spliced transcripts with SLE development. Expressions of the long (V1) and short (V2) CLEC16A isoforms in the peripheral blood mononuclear cells (PBMCs) were assayed by quantitative real time PCR and compared between healthy individuals and SLE patients. Correlation of CLEC16A isoform expression levels with SLE susceptibility, disease severity and twelve clinical parameters were also evaluated. Full length transcripts of CLEC16A V1 and V2 isoforms were readily amplified from PBMCs of healthy controls and patients at varying abundance. Compared with healthy controls (n = 86), expression levels of V1 and V2 were significantly reduced by ~two- and four-fold respectively in SLE patients (n = 181). The relative V2/V1 ratio was also significantly reduced by approximately two-fold. With regard to SLE disease parameters, only a weak positive correlation was found between CLEC16A V1 expression levels and SLE disease activity index (SLEDAI) score. Taken together, CLEC16A was found to be a susceptibility factor for SLE, with possible contribution to the development of the disease.
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Affiliation(s)
- Rachel C Y Tam
- Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
| | - Alfred L H Lee
- Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
| | - Wanling Yang
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
| | - Chak Sing Lau
- Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
| | - Vera S F Chan
- Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
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Troldborg A, Thiel S, Laska MJ, Deleuran B, Jensenius JC, Stengaard-Pedersen K. Levels in plasma of the serine proteases and associated proteins of the lectin pathway are altered in patients with systemic lupus erythematosus. J Rheumatol 2015; 42:948-51. [PMID: 25877499 DOI: 10.3899/jrheum.141163] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2015] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To examine whether proteins of the lectin pathway of the complement system are involved in systemic lupus erythematosus (SLE) pathogenesis. METHODS Using time-resolved immunofluorometric assays, plasma levels of mannan-binding lectin (MBL)-associated serine proteases 1 (MASP-1), MASP-2, MASP-3, MBL-associated protein of 19 kDa (MAp19), and MAp44 were determined in 58 patients with SLE and 65 healthy controls (HC). RESULTS Plasma concentrations in patients with SLE were higher than HC regarding MASP-1, MASP-3, and MAp44 (p < 0.0001, 0.0003, and 0.0013). Complement factor 3 correlated negatively and anti-dsDNA positively with levels of MAp19 (p = 0.0035, p = 0.0133). CONCLUSION In SLE, plasma levels of MASP and MAp are altered and associated with SLE characteristics, supporting a role in SLE pathogenesis.
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Affiliation(s)
- Anne Troldborg
- From the Department of Rheumatology, Aarhus University Hospital; Department of Clinical Medicine, and Department of Biomedicine, Aarhus University, Aarhus, Denmark.A. Troldborg, MD, PhD candidate, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University; S. Thiel, Professor; M.J. Laska, PhD, Assistant Professor, Department of Biomedicine, Aarhus University; B. Deleuran, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Biomedicine, Aarhus University; J.C. Jensenius, DrMed, DrPhil, Professor, Department of Biomedicine, Aarhus University; K. Stengaard-Pedersen, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University.
| | - Steffen Thiel
- From the Department of Rheumatology, Aarhus University Hospital; Department of Clinical Medicine, and Department of Biomedicine, Aarhus University, Aarhus, Denmark.A. Troldborg, MD, PhD candidate, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University; S. Thiel, Professor; M.J. Laska, PhD, Assistant Professor, Department of Biomedicine, Aarhus University; B. Deleuran, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Biomedicine, Aarhus University; J.C. Jensenius, DrMed, DrPhil, Professor, Department of Biomedicine, Aarhus University; K. Stengaard-Pedersen, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University
| | - Magdalena Janina Laska
- From the Department of Rheumatology, Aarhus University Hospital; Department of Clinical Medicine, and Department of Biomedicine, Aarhus University, Aarhus, Denmark.A. Troldborg, MD, PhD candidate, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University; S. Thiel, Professor; M.J. Laska, PhD, Assistant Professor, Department of Biomedicine, Aarhus University; B. Deleuran, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Biomedicine, Aarhus University; J.C. Jensenius, DrMed, DrPhil, Professor, Department of Biomedicine, Aarhus University; K. Stengaard-Pedersen, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University
| | - Bent Deleuran
- From the Department of Rheumatology, Aarhus University Hospital; Department of Clinical Medicine, and Department of Biomedicine, Aarhus University, Aarhus, Denmark.A. Troldborg, MD, PhD candidate, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University; S. Thiel, Professor; M.J. Laska, PhD, Assistant Professor, Department of Biomedicine, Aarhus University; B. Deleuran, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Biomedicine, Aarhus University; J.C. Jensenius, DrMed, DrPhil, Professor, Department of Biomedicine, Aarhus University; K. Stengaard-Pedersen, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University
| | - Jens Christian Jensenius
- From the Department of Rheumatology, Aarhus University Hospital; Department of Clinical Medicine, and Department of Biomedicine, Aarhus University, Aarhus, Denmark.A. Troldborg, MD, PhD candidate, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University; S. Thiel, Professor; M.J. Laska, PhD, Assistant Professor, Department of Biomedicine, Aarhus University; B. Deleuran, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Biomedicine, Aarhus University; J.C. Jensenius, DrMed, DrPhil, Professor, Department of Biomedicine, Aarhus University; K. Stengaard-Pedersen, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University
| | - Kristian Stengaard-Pedersen
- From the Department of Rheumatology, Aarhus University Hospital; Department of Clinical Medicine, and Department of Biomedicine, Aarhus University, Aarhus, Denmark.A. Troldborg, MD, PhD candidate, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University; S. Thiel, Professor; M.J. Laska, PhD, Assistant Professor, Department of Biomedicine, Aarhus University; B. Deleuran, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Biomedicine, Aarhus University; J.C. Jensenius, DrMed, DrPhil, Professor, Department of Biomedicine, Aarhus University; K. Stengaard-Pedersen, DrMed, Professor, Department of Rheumatology, Aarhus University Hospital and Department of Clinical Medicine, Aarhus University
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Pathogenesis and potential therapeutic targets in systemic lupus erythematosus: from bench to bedside. AUTOIMMUNITY HIGHLIGHTS 2014; 5:33-45. [PMID: 26000154 PMCID: PMC4389042 DOI: 10.1007/s13317-014-0058-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 06/12/2014] [Indexed: 12/18/2022]
Abstract
Systemic lupus erythematosus (SLE) is considered an autoimmune disease with multiorgan involvement. Many advances have been made during the last decade regarding inflammatory pathways, genetic and epigenetic alterations, adaptive and innate immune system mechanisms specifically involved in SLE pathogenesis. Apoptosis has been proposed as an important player in SLE pathogenesis more than a decade ago. However, only recently new key apoptotic pathways have been investigated and the link between apoptotic debris containing autoantigens, innate immunity and ongoing inflammation has been further elucidated. Better understanding of cellular mechanisms and involved cytokines contributed to the development of new biological drugs specifically addressed for SLE therapy.
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Chung CP, Solus JF, Oeser A, Li C, Raggi P, Smith JR, Stein CM. Genetic variation and coronary atherosclerosis in patients with systemic lupus erythematosus. Lupus 2014; 23:876-80. [PMID: 24699314 DOI: 10.1177/0961203314530019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 03/11/2014] [Indexed: 12/23/2022]
Abstract
Coronary artery disease is the major cause of mortality in patients with systemic lupus erythematosus (SLE). Increased cardiovascular risk in SLE is not explained by traditional risk factors. We examined the hypothesis that genetic variation contributes to the presence of coronary atherosclerosis in patients with SLE. The genotypes of single-nucleotide polymorphisms (SNP) in 152 candidate genes linked with autoimmune or cardiovascular risk were determined in 125 patients with SLE. Coronary artery calcium (CAC), a measure of coronary atherosclerosis, was detected in 32 patients (26%) by electron-beam computed tomography. Polymorphism in 20 of the candidate genes (ADAM33, ADIPOQ, CCL5, CCR7, CDKN2B, CSF1, IL4, IL12A, IL23R, INS, IRF5, MIF, MS4A1, PTGS1, PTPN22, RETN, SELE, TNFSF4, TNFRSF11B, and VCAM1) were nominally associated with the presence of CAC (p-values = 0.001-0.047 after adjustment for age, sex and race). Some of these are known susceptibility genes for SLE and others have been implicated in cardiovascular disease in other populations. No association withstood false discovery rate adjustment. Replication studies in additional cohorts of patients with SLE may be informative.
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Affiliation(s)
- C P Chung
- Departments of Medicine, Vanderbilt University, Nashville, TN, USA
| | - J F Solus
- Departments of Medicine, Vanderbilt University, Nashville, TN, USA
| | - A Oeser
- Departments of Medicine, Vanderbilt University, Nashville, TN, USA
| | - C Li
- Department of Biostatistics, Vanderbilt University, Nashville, TN, USA
| | - P Raggi
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - J R Smith
- Departments of Medicine, Vanderbilt University, Nashville, TN, USA
| | - C M Stein
- Departments of Medicine, Vanderbilt University, Nashville, TN, USA
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Gustafsson JT, Svenungsson E. Definitions of and contributions to cardiovascular disease in systemic lupus erythematosus. Autoimmunity 2013; 47:67-76. [PMID: 24228980 DOI: 10.3109/08916934.2013.856005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Patients with systemic lupus erythematosus (SLE) have a significantly increased risk of cardiovascular disease (CVD). Increased prevalence of atherosclerosis may explain part of this enhanced risk, but SLE related CVD can also result from other mechanisms. Vascular events may be the result of several pathophysiologic mechanisms; some can be caused by atherosclerosis, others may be primarily thrombotic, and some may be due to ongoing inflammation. The traditional risk factors are of importance for the development of CVD in lupus. However, lupus-related factors, such as endothelial dysfunction and inflammation, renal impairment and disease activity, lupus phenotype, autoantibodies and genetic predisposition are equally or even more important. Risk factors may also contribute separately or in combination to increase the risk of atherosclerosis and clinical CVD in SLE. Studies investigating risk factors for CVD in SLE vary with respect to definition of outcome, it is, e.g. common that the terms atherosclerosis and clinical CVD are used interchangeably. Varying definitions and outcomes may thus explain divergent results of different studies and make comparisons difficult. This review summarizes some of the current knowledge regarding risk factors and mechanisms for atherosclerosis and clinical CVD in SLE. Aspects on the importance of CVD definitions and outcomes are briefly discussed.
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Affiliation(s)
- Johanna T Gustafsson
- Rheumatology Unit, Department of Medicine, Karolinska Institutet, Karolinska University Hospital , Stockholm , Sweden
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Beccastrini E, D'Elios MM, Emmi G, Silvestri E, Squatrito D, Prisco D, Emmi L. Systemic lupus erythematosus: immunopathogenesis and novel therapeutic targets. Int J Immunopathol Pharmacol 2013; 26:585-96. [PMID: 24067455 DOI: 10.1177/039463201302600302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is the prototype of autoimmune diseases with multiorgan involvement. SLE presents many genetic and epigenetic associations and the pathogenesis is characterized by a complex network of alterations affecting both adaptative and innate immunity. The disclosure of novel mechanisms of SLE pathogenesis suggested new therapeutic targets, based on interference with the cytokine pathways or on depletion of the immune cells.
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Affiliation(s)
- E Beccastrini
- SOD Medical Pathology, Center for Autoimmune Systemic Diseases, Behcet Center and Lupus Clinic, AOU Careggi, Florence, Italy
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Hristova M, Dourmishev L, Kamenarska Z, Miteva L, Vinkov A, Kaneva R, Mitev V, Savov A. MBL2polymorphisms - manifestations in Bulgarian patients with adult dermatomyositis and systemic lupus erythematosus. Int J Immunogenet 2013; 41:119-25. [DOI: 10.1111/iji.12093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 08/12/2013] [Accepted: 08/25/2013] [Indexed: 11/30/2022]
Affiliation(s)
- M. Hristova
- Department of Clinical Laboratory and Clinical Immunology; Medical University-Sofia; Sofia Bulgaria
| | - L. Dourmishev
- Department of Dermatology and Venereology; Medical University-Sofia; Sofia Bulgaria
| | - Z. Kamenarska
- Molecular Medicine Center; Medical University-Sofia and Department of Medical Chemistry and Biochemistry; Medical University-Sofia; Sofia Bulgaria
| | - L. Miteva
- Department of Dermatology and Venereology; Medical University-Sofia; Sofia Bulgaria
| | - A. Vinkov
- XXVIII Diagnostic and Consultative Centre; Sofia Bulgaria
| | - R. Kaneva
- Molecular Medicine Center; Medical University-Sofia and Department of Medical Chemistry and Biochemistry; Medical University-Sofia; Sofia Bulgaria
| | - V. Mitev
- Molecular Medicine Center; Medical University-Sofia and Department of Medical Chemistry and Biochemistry; Medical University-Sofia; Sofia Bulgaria
| | - A. Savov
- National Genetic Laboratory; Majchin Dom Hospital; Sofia Bulgaria
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Pradhan V, Mahant G, Rajadhyaksha A, Surve P, Rajendran V, Patwardhan M, Nadkarni A, Dighe S, Ghosh K. A study on anti-mannose binding lectin (anti-MBL) antibodies and serum MBL levels in Indian systemic lupus erythematosus patients. Rheumatol Int 2012; 33:1533-9. [PMID: 23255139 DOI: 10.1007/s00296-012-2588-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Accepted: 11/30/2012] [Indexed: 11/26/2022]
Abstract
Systemic lupus erythematosus (SLE) is a prototype autoimmune disease characterized by systemic inflammation and autoantibody production. Anti-MBL autoantibodies have been studied in SLE for their possible effect on MBL levels and functional activity. This study aimed at detection of anti-MBL autoantibodies in Indian SLE patients and evaluates their relationship with related immunological parameters. Two hundred diagnosed SLE patients from Western India were included in the study where 87 patients were lupus nephritis (LN) (43.5 %) and remaining (56.5 %) were non-LN. Disease activity was assessed using the Systemic Lupus Erythematosus Disease Activity Index (SLEDAI). Anti-MBL autoantibodies to IgG and IgM isotypes, anti-C1q autoantibodies, MBL levels and circulating immune complex levels were detected by ELISA. C3, C4 and CRP levels were detected by nephelometer. Anti-MBL autoantibodies were detected in 52 % SLE patients, where 55 % had IgG-anti-MBL, 33.8 % had IgM-anti-MBL and 11.3 % had both subclasses. Low MBL levels were present in 64.4 % anti-MBL positives as compared with 61.5 % in anti-MBL negatives. Among anti-MBL positives, 74 % had anti-C1q antibodies, whereas 41.7 % of anti-MBL negatives had anti-C1q autoantibodies (p = 3.45E06). An inverse correlation was observed between serum MBL and CIC levels. A statistically significant difference was noted between anti-MBL positives and anti-MBL negative patients with hsCRP levels (p = 0.002). Occurrence of infections was higher among anti-MBL positives (65 %) as compared with anti-MBL negatives (35 %). The difference between SLEDAI scores among anti-MBL positive and negative groups was statistically insignificant. Anti-MBL autoantibodies in SLE patients can influence functional activity of MBL and have a significant role in SLE disease pathogenesis.
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Affiliation(s)
- Vandana Pradhan
- Department of Autoimmune Disorders, National Institute of Immunohaematology, Indian Council of Medical Research, King Edward Memorial Hospital, 13th floor, Parel, Mumbai 400 012, India.
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Panda AK, Parida JR, Tripathy R, Pattanaik SS, Ravindran B, Das BK. Mannose binding lectin: a biomarker of systemic lupus erythematosus disease activity. Arthritis Res Ther 2012; 14:R218. [PMID: 23068019 PMCID: PMC3580530 DOI: 10.1186/ar4057] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 09/27/2012] [Indexed: 01/05/2023] Open
Abstract
Introduction A role for mannose binding lectin (MBL) in autoimmune diseases has been demonstrated earlier and elevated level of MBL has been shown in systemic lupus erythematosus (SLE) patients. In the current study, we investigated MBL as a potential biomarker for disease activity in SLE. Methods In a case control study SLE patients (93 females) and 67 age, sex, ethnicity matched healthy controls were enrolled. Plasma MBL levels were quantified by enzyme linked immunosorbent assay (ELISA). Clinical, serological and other markers of disease activity (C3, C4 and anti-dsDNA) were measured by standard laboratory procedures. Results Plasma MBL levels were significantly high in SLE patients compared to healthy controls (P < 0.0001). MBL levels were variable in different clinical categories of SLE. Lower levels were associated with musculoskeletal and cutaneous manifestations (P = 0.002), while higher and intermediate MBL levels were significantly associated with nephritis in combination with other systemic manifestations (P = 0.01 and P = 0.04 respectively). Plasma MBL correlated with systemic lupus erythematosus disease activity index (SLEDAI) (P = 0.0003, r = 0.36), anti-dsDNA (P < 0.0001, r = 0.54), proteinuria (P < 0.0001, r = 0.42) and negatively correlated with C3 (P = 0.007, r = -0.27) and C4 (P = 0.01, r = -0.29). Conclusions Plasma MBL is a promising marker in the assessment of SLE disease activity.
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Association of RANTES and MBL gene polymorphisms with systemic lupus erythematosus: a meta-analysis. Mol Biol Rep 2012; 40:941-8. [PMID: 23065234 DOI: 10.1007/s11033-012-2135-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 10/03/2012] [Indexed: 12/16/2022]
Abstract
The RANTES (regulated on activation normal T cell expressed and secreted) and MBL (mannose binding lectin) single-nucleotide polymorphisms have been repeatedly associated with systemic lupus erythematosus (SLE), but the findings are not consistent across studies. The aim of this study was to determine whether the functional RANTES-28, -403 and MBL2 A/O polymorphisms confer susceptibility to SLE in multiple ethnic populations. A meta-analysis was conducted (allelic contrast, the additive model, the dominant model and the recessive model) on RANTES with seven studies (four studies for RANTES-28: three Asian and one American studies; three studies for RANTES-403: two Asian and one European studies), MBL with eight studies (five European and three American studies). OR is used as a measure of the effect of the association in a fixed/random effects model. The meta-analysis indicated that none of the two polymorphisms in gene of the RANTES showed any significant association with SLE risk, respectively, except for the recessive model (OR = 1.24, 95 % CI: 1.01-1.52, P = 0.04) in all study subjects combined with the two polymorphisms. According to the MBL2 A/O polymorphism, the results indicated a significant association between the polymorphism and SLE in allelic contrast (OR = 0.83, 95 % CI: 0.73-0.93, P = 0.002). While stratified by ethnicity in European, no significant association was found. In summary, the present study suggests that the RANTES-28, -403 polymorphisms do not associate with SLE, but the MBL2 A/O polymorphism might associate with SLE.
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Panda AK, Parida JR, Tripathy R, Pattanaik SS, Ravindran B, Das BK. Low producer MBL genotypes are associated with susceptibility to systemic lupus erythematosus in Odisha, India. Hum Immunol 2012; 74:114-9. [PMID: 23000377 DOI: 10.1016/j.humimm.2012.09.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Revised: 08/23/2012] [Accepted: 09/10/2012] [Indexed: 10/27/2022]
Abstract
Variants of MBL gene have been associated with autoimmune disorders. The aim of this study was to explore whether common polymorphisms in MBL gene are associated with susceptibility to systemic lupus erythematosus (SLE) and its clinical manifestations in a cohort from eastern India. A total of 108 female SLE patients and 105 age, sex, and ethnically matched healthy controls were enrolled in the study. MBL2 codon and promoter polymorphisms were genotyped by AS-PCR and dARMS PCR, respectively. Plasma level of MBL was quantified by ELISA. Higher frequency of BB genotype and minor allele (B) was observed in patients of SLE compared to healthy controls (BB genotype: P = 0.0002; OR = 5.75, 95% CI = 2.09-15.76, B allele: P < 0.0001; OR = 2.78, 95% CI = 1.66-4.64). MBL codon 54, H-550L, Y-221X polymorphisms and combined MBL genotypes contributed to plasma MBL levels. Prevalence of MBL low producer genotype (LXA/LYB, LYB/LYB and LXB/LXB) was significantly higher in SLE patients compared to healthy control. (P = 0.005; OR = 3.09, 95% CI = 1.38-6.91). On analysis of clinical manifestations, MBL low producer genotype was significantly associated with autoimmune haemolytic anaemia (P = 0.006; OR = 13.06). Results of the present study indicate MBL2 variants as possible risk factors for development of SLE and clinical manifestation in eastern India.
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Affiliation(s)
- Aditya K Panda
- Infectious Disease Biology Group, Institute of Life Sciences, Bhubaneswar, Odisha, India
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Pradhan V, Mahant G, Rajadhyaksha A, Surve P, Rajendran V, Patwardhan M, Nadkarni A, Dighe S, Ghosh K. A study on anti-mannose binding lectin (anti-MBL) antibodies and serum MBL levels in Indian systemic lupus erythematosus patients. Rheumatol Int 2012; 33:1193-9. [DOI: 10.1007/s00296-012-2519-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Accepted: 08/23/2012] [Indexed: 11/28/2022]
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Pradhan V, Rajadhyaksha A, Mahant G, Surve P, Patwardhan M, Dighe S, Ghosh K. Anti-C1q antibodies and their association with complement components in Indian systemic lupus erythematosus patients. Indian J Nephrol 2012; 22:353-7. [PMID: 23326045 PMCID: PMC3544056 DOI: 10.4103/0971-4065.103911] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a prototype autoimmune disease, characterized by immune complex formation and systemic inflammation. Complement components such as C1q and mannose-binding lectin (MBL) play an important role in the clearance of immune complexes. Anti-C1q antibodies are associated with lupus nephritis and reduced levels of the complement components. The objective of this study was to detect anti-C1q antibodies in SLE patients and to evaluate their association with the complement components. Sixty SLE patients were included, of whom 75% had lupus nephritis (LN) and 25% were without renal manifestations (non-LN). The disease activity was assessed at the time of evaluation by the systemic lupus erythematosus disease activity index (SLEDAI). Anti-C1q antibodies, circulating immune complexes, and serum MBL levels were detected by enzyme-linked immunosorbent assay. The anti-C1q antibody prevalence was 58.3%. The LN patients showed 60% anti-C1q positivity with a higher percentage in membranoproliferative glomerulonephritis patients (51.9%). Anti-dsDNA positivity was slightly higher among the anti-C1q positives than in the anti-C1q negatives (65.7% vs. 60%). A higher percentage of reduced C3 and C4 levels was noted among the anti-C1q positives. The LN patients showed a higher percentage of low MBL levels among anti-C1q negatives than in the anti-C1q positives (61.1% vs. 55.6%). Non-LN patients showed a higher percentage of low MBL levels among anti-C1q positives than among anti-C1q negatives (87.5% vs. 57.1%). Anti-C1q antibodies were found in both LN and non-LN patients, but there was no correlation with the clinical severity of the disease.
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Affiliation(s)
- V Pradhan
- Department of Autoimmune Disorders, National Institute of Immunohematology, Indian Council of Medical Research, Mumbai, India
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Alegretti AP, Schneider L, Piccoli AK, Xavier RM. The role of complement regulatory proteins in peripheral blood cells of patients with systemic lupus erythematosus: review. Cell Immunol 2012; 277:1-7. [PMID: 22795896 DOI: 10.1016/j.cellimm.2012.06.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 04/16/2012] [Accepted: 06/18/2012] [Indexed: 12/11/2022]
Abstract
CD55, CD59, CD35 and CD46 are cell membrane proteins that have regulatory properties on the activation of the complement cascade. Deficiency in the expression of these proteins may be associated with lower protection of healthy cells against complement mediated lysis and also with the accumulation of immune complexes in tissues. Few studies assess the expression of these proteins in patients with SLE and the mechanisms that regulate reduction in cellular expression, whereas its impact on manifestations of systemic lupus erythematosus is still unknown.
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Affiliation(s)
- Ana Paula Alegretti
- Serviço de Patologia Clínica, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Brazil.
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Liu Y, Liu FL, Bai ZJ, Zhao N, Zhang LY, Lu X, Chen ZL. Defective activities, but not secretions, resulting from gene point mutations of human mannan-binding lectin. Mol Med Rep 2012; 5:1121-7. [PMID: 22323042 PMCID: PMC3493102 DOI: 10.3892/mmr.2012.782] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 02/03/2012] [Indexed: 11/25/2022] Open
Abstract
Human mannan-binding lectin (MBL) plays a pivotal role in innate immunity. Substantial literature supports the belief that three point mutations, CGT52TGT, GGC54GAC and GGA57GAA, in the collagen-like region (CLR) of the human MBL gene, are associated with increased susceptibility to infection, autoimmunity and carcinogenesis. To investigate the mechanisms of MBL deficiency, human wild-type and three variant MBL genes were expressed in COS-7 and Chinese hamster ovary (CHO) cells. Results showed that no apparent differences were found among the levels of gene transcription and protein secretion of four forms of MBL. However, the degree of oligomerization of variant forms of MBL was found to be much lower than that of recombinant human wild-type MBL. The ability of variant MBL proteins to bind mannan was much weaker than that of the wild-type MBL protein, and the MBL variants failed to effectively activate the complement lectin pathway. These data suggested that a lower order oligomer, but not decreased plasma levels of MBL, may be the main result of MBL gene mutations and may be associated with immunodeficiency.
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Affiliation(s)
- Ying Liu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, PR China
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Heitzeneder S, Seidel M, Förster-Waldl E, Heitger A. Mannan-binding lectin deficiency - Good news, bad news, doesn't matter? Clin Immunol 2011; 143:22-38. [PMID: 22377282 DOI: 10.1016/j.clim.2011.11.002] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 11/03/2011] [Accepted: 11/04/2011] [Indexed: 01/13/2023]
Abstract
Mannan-binding lectin (MBL) deficiency has been classified as a commonly occurring immune disorder, affecting approximately 30% of the human population. MBL, being part of the innate immune system, supports the recognition of infectious pathogens by binding to carbohydrate moieties expressed on microorganisms and activates the lectin pathway of the complement system. MBL2 gene polymorphisms are associated with quantitative and qualitative MBL abnormalities in the serum. The clinical impact of MBL deficiency and its association to a wide variety of diseases has been extensively studied. The picture is puzzling as the studies suggest a detrimental or beneficial or no impact of low or high MBL serum levels on disease susceptibility. In this review we attempt to extract what is relevant from the literature and address controversial issues. We finally suggest that a comprehensive understanding of the role of MBL in human diseases requires considering its context-dependency.
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Tsai YC, Yeh KW, Yao TC, Huang YL, Kuo ML, Huang JL. Mannose-binding lectin expression genotype in pediatric-onset systemic lupus erythematosus: associations with susceptibility to renal disease and protection against infections. J Rheumatol 2011; 38:1429-35. [PMID: 21532056 DOI: 10.3899/jrheum.100961] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To study possible associations between extended mannose-binding lectin (MBL) expression genotypes and clinical manifestations and infections in children with systemic lupus erythematosus (SLE). METHODS Clinical and laboratory variables for a cohort of 125 patients with pediatric-onset SLE were obtained by clinical examinations and chart reviews. Controls were 137 age-matched and sex-matched healthy children and adolescents. MBL gene polymorphisms were genotyped by polymerase chain reaction. Serum MBL concentrations were measured by ELISA. RESULTS The frequencies of extended MBL expression genotypes did not differ between patients and controls. There were 82 patients with SLE who had high MBL expression genotypes and 43 who had medium and low MBL expression genotypes. Patients with the high MBL expression genotype had renal disorders more frequently than patients in the group with medium and low MBL expression genotypes [54/82 (65.9%) vs 18/43 (41.9%), respectively; p = 0.013] and fewer serious bacterial infections [22/82 (26.8%) vs 20/43 (46.5%); p = 0.030]. Using logistic regression for patients with SLE, a high MBL expression genotype was independently associated with renal disorders (OR 2.49, 95% CI 1.15-5.39, p = 0.021) and had a protective effect against serious bacterial infections (OR 0.29, 95% CI 0.12-0.71, p = 0.007). MBL levels decreased significantly when patients with active SLE reached an inactive stage (1.56 ± 0.55 μg/ml vs 1.08 ± 0.65 μg/ml; p = 0.001), but these levels were still higher than those in controls. CONCLUSION Our findings suggest that a high MBL expression genotype is a risk factor for renal disorder, while it has a protective effect against infections. Serum MBL levels reflect SLE activity.
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Affiliation(s)
- Yi-Chan Tsai
- Department of Pediatrics, Chang Gung Memorial Hospital, Chia-Yi, Taiwan
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Sandrin-Garcia P, Brandão LAC, Coelho AVC, Guimarães RL, Pancoto JAT, Segat L, Donadi EA, de Lima-Filho JL, Crovella S. Mannose binding lectin gene (MBL2) functional polymorphisms are associated with systemic lupus erythematosus in southern Brazilians. Hum Immunol 2011; 72:516-21. [PMID: 21510992 DOI: 10.1016/j.humimm.2011.03.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 03/16/2011] [Accepted: 03/31/2011] [Indexed: 11/16/2022]
Abstract
Susceptibility to systemic lupus erythematosus (SLE) has been associated with immunologic, environmental, and genetic factors. To uncover a possible association between MBL2 gene polymorphisms and SLE, we analyzed functional polymorphisms in the promoter and first exon of the MBL2 gene in 134 Brazilian SLE patients and 101 healthy controls. Genotype and allele frequencies of MBL2 A/O polymorphism were significantly different between patients and controls, and the O allele was associated with an increased risk of SLE. An association between low mannose binding lectin (MBL) producer combined genotypes and increased risk for SLE was also reported. Furthermore, when stratifying SLE patients according to clinical and laboratory data, an association between the A/O genotype and nephritic disorders and between the X/Y genotype and antiphospholipid syndrome was evident. Combined genotypes responsible for low MBL production were more frequently observed in SLE patients with nephritis. Our results indicate MBL2 polymorphisms as possible risk factors for SLE development and disease-related clinical manifestations.
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Affiliation(s)
- Paula Sandrin-Garcia
- Laboratory of Immunopathology Keizo Asami, Federal University of Pernambuco, Recife, Brazil
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Vianna P, Da Silva GK, Dos Santos BP, Bauer ME, Dalmáz CA, Bandinelli E, Chies JAB. Association between mannose-binding lectin gene polymorphisms and pre-eclampsia in Brazilian women. Am J Reprod Immunol 2011; 64:359-74. [PMID: 20408832 DOI: 10.1111/j.1600-0897.2010.00846.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
PROBLEM Mannose-binding lectin (MBL) is involved in the maintenance of an inflammatory environment in uterus. High MBL levels have been associated with successful pregnancies whereas low levels are involved in pre-eclampsia (PE) development. Here, we evaluated MBL2 gene polymorphisms in the structural and promoter regions addressing their association with PE. METHOD OF STUDY DNA samples from 162 control pregnant women and 157 pregnant PE women were genotyped and data compared with demographic and clinical characteristics. RESULTS High frequency of C and D alleles (related to low MBL levels) was observed in PE women when compared to controls (C: 0.08 versus 0.03, P = 0.006; D: 0.10 versus 0.05, P = 0.009). Grouping the MBL genotypes according to phenotype, a higher frequency of OO genotype was observed in PE women when compared to control women (0.15 versus 0.04, P = 0.007). CONCLUSION Our data suggest that women with genotypes associated with low MBL levels could be potential PE developers.
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Affiliation(s)
- Priscila Vianna
- Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, RS - Brazil
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The role of mannose-binding lectin gene polymorphisms in susceptibility to HIV-1 infection in Southern Brazilian patients. AIDS 2011; 25:411-8. [PMID: 21192229 DOI: 10.1097/qad.0b013e328342fef1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE This study investigates the role of mannose-binding lectin (MBL) in the susceptibility to HIV-1 infection analyzing polymorphisms located at the MBL2 promoter and exon 1 regions. MATERIALS AND METHODS The prevalence of MBL2 variant alleles was investigated in 410 HIV-1-infected patients from the South Brazilian HIV cohort and in 345 unexposed uninfected healthy individuals. The promoter variants were genotyped using polymerase chain reaction with sequence-specific primers (PCR-SSP) and exon 1 variants were analyzed by real-time PCR using a melting temperature assay and were confirmed by PCR-restriction fragment length polymorphism (RFLP). MBL2 genotypic and allelic frequencies were compared between HIV-1-infected patients and controls using the chi-squared tests. RESULTS The analyses were performed subdividing the individuals according to their ethnic origin. Among Euro-derived individuals a higher frequency of the LX/LX genotype was observed in patients when compared to controls (P < 0.001). The haplotypic analysis also showed a higher frequency of the haplotypes associated with lower MBL levels among HIV-1-infected patients (P = 0.0001). Among Afro-derived individuals the frequencies of LY/LY and HY/HY genotypes were higher in patients when compared to controls (P = 0.009 and P = 0.02). CONCLUSIONS An increased frequency of MBL2 genotypes associated with low MBL levels was observed in Euro-derived patients, suggesting a potential role for MBL in the susceptibility to HIV-1 infection in Euro-derived individuals.
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Litvack ML, Palaniyar N. Review: Soluble innate immune pattern-recognition proteins for clearing dying cells and cellular components: implications on exacerbating or resolving inflammation. Innate Immun 2010; 16:191-200. [PMID: 20529971 DOI: 10.1177/1753425910369271] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Soluble innate immune pattern-recognition proteins (sPRPs) identify non-self or altered-self molecular patterns. Dying cells often display altered-self arrays of molecules on their surfaces. Hence, sPRPs are ideal for recognizing these cells and their components. Dying cell surfaces often contain, or allow the access to different lipids, intracellular glycoproteins and nucleic acids such as DNA at different stages of cell death. These are considered as 'eat me' signals that replace the native 'don't eat me' signals such as CD31, CD47 present on the live cells. A programmed cell death process such as apoptosis also generates cell surface blebs that contain intracellular components. These blebs are easily released for effective clearance or signalling. During late stages of cell death, soluble components are also released that act as 'find me' signal (e.g. LysoPC, nucleotides). The sPRPs such as collectins, ficolins, pentraxins, sCD14, MFG-E8, natural IgM and C1q can effectively identify some of these specific molecular patterns. The biological end-point is different depending on sPRP, tissue, stage of apoptosis and the type of cell death. The sPRPs that reside in the immune-privileged surfaces such as lungs often act as opsonins and enhance a silent clearance of dying cells and cellular material by macrophages and other phagocytic cells. Although the recognition of these materials by complement-activating proteins could amplify the opsonic signal, this pathway may aggravate inflammation. Clear understanding of the involvement of specific sPRPs in cell death and subsequent clearance of dying cell and their components is essential for devising appropriate treatment strategies for diseases involving infection, inflammation and auto-antibody generation.
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Troelsen LN, Garred P, Christiansen B, Torp-Pedersen C, Jacobsen S. Genetically determined serum levels of mannose-binding lectin correlate negatively with common carotid intima-media thickness in systemic lupus erythematosus. J Rheumatol 2010; 37:1815-21. [PMID: 20595266 DOI: 10.3899/jrheum.100158] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE Patients with systemic lupus erythematosus (SLE) have excess cardiovascular morbidity and mortality due to accelerated atherosclerosis that cannot be attributed to traditional cardiovascular risk factors alone. Variant alleles of the mannose-binding lectin gene (MBL2) causing low serum concentrations of functional mannose-binding lectin (MBL) are associated with SLE and development of atherosclerosis. Recent studies show that these variant alleles are associated with increased risk of arterial thrombosis and cardiovascular disease in patients with SLE. Intima-media thickness of the common carotid artery (ccIMT) is a validated noninvasive anatomic measure of subclinical atherosclerosis. In a cross-sectional study we examined the relation among ccIMT, MBL2 genotypes, and serum concentrations of MBL. METHODS The MBL2 extended genotypes (YA/YA, YA/XA, XA/XA, YA/YO, XA/YO, YO/YO) and serum concentrations of MBL were determined in 41 outpatients with SLE. ccIMT was measured by means of ultrasonography. Traditional and nontraditional cardiovascular risk modifiers were assessed and controlled for. RESULTS Using nonparametric Mann-Whitney tests we found a significant difference in ccIMT between low-expressing (XA/XA+YA/YO+XA/YO+YO/YO) and high-expressing (YA/YA+YA/XA) MBL2 genotypes (p = 0.034). The difference in ccIMT remained significant in multivariable analysis adjusting for traditional and nontraditional cardiovascular risk modifiers (p = 0.049). ccIMT was negatively correlated to serum concentrations of MBL (Spearman rho = -0.33, p = 0.037). This relation also remained significant in multivariable analysis (p = 0.042). CONCLUSION In this group of SLE patients, MBL2 low-expressing genotypes and low serum levels of MBL were correlated with ccIMT, independent of the effects of traditional and nontraditional cardiovascular risk modifiers.
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Affiliation(s)
- Lone N Troelsen
- Department of Rheumatology, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, DK-2100 Copenhagen, Denmark.
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