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Williams EM, Bruner L, Adkins A, Vrana C, Logan A, Kamen D, Oates JC. I too, am America: a review of research on systemic lupus erythematosus in African-Americans. Lupus Sci Med 2016; 3:e000144. [PMID: 27651918 PMCID: PMC5013381 DOI: 10.1136/lupus-2015-000144] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 07/27/2016] [Accepted: 07/28/2016] [Indexed: 12/21/2022]
Abstract
Systemic lupus erythematosus (SLE) is a multi-organ autoimmune disorder that can cause significant morbidity and mortality. A large body of evidence has shown that African-Americans experience the disease more severely than other racial-ethnic groups. Relevant literature for the years 2000 to August 2015 were obtained from systematic searches of PubMed, Scopus, and the EBSCOHost platform that includes MEDLINE, CINAHL, etc. to evaluate research focused on SLE in African-Americans. Thirty-six of the 1502 articles were classified according to their level of evidence. The systematic review of the literature reported a wide range of adverse outcomes in African-American SLE patients and risk factors observed in other mono and multi-ethnic investigations. Studies limited to African-Americans with SLE identified novel methods for more precise ascertainment of risk and observed novel findings that hadn't been previously reported in African-Americans with SLE. Both environmental and genetic studies included in this review have highlighted unique African-American populations in an attempt to isolate risk attributable to African ancestry and observed increased genetic influence on overall disease in this cohort. The review also revealed emerging research in areas of quality of life, race-tailored interventions, and self-management. This review reemphasizes the importance of additional studies to better elucidate the natural history of SLE in African-Americans and optimize therapeutic strategies for those who are identified as being at high risk.
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Affiliation(s)
- Edith M Williams
- Division of Rheumatology, Department of Public Health Sciences, Medicine,MUSC Center for Health Disparities Research, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Larisa Bruner
- Arnold School of Public Health, University of South Carolina, Columbia, South Carolina, USA
| | - Alyssa Adkins
- University of South Carolina, Columbia, South Carolina, USA
| | - Caroline Vrana
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Ayaba Logan
- The Department of Public Health and Programs in Nurse Anesthesia, Liaison for College of Nursing, Medical University of South Carolina Library, Charleston, South Carolina, USA
| | - Diane Kamen
- Department of Rheumatology and Immunology, Medical University of South Carolina, Charleston, South Carolina, USA
| | - James C Oates
- Department of Medicine, Division of Rheumatology,Medical University of South Carolina, Charleston, South Carolina, USA
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Stiborová I, Král V, Rovenský J, Blažíčková S. Clinical significance of anti-C1q antibodies in SLE. ACTA FACULTATIS PHARMACEUTICAE UNIVERSITATIS COMENIANAE 2015. [DOI: 10.1515/afpuc-2015-0045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Lupus nephritis (LN) is a severe and frequent complication of systemic lupus erythematosus (SLE). Untreated cases very often lead to patients’ death; therefore, it is important to use markers sensitive and specific enough for the diagnosis and subsequent monitoring of nephritis. Autoantibodies against double-stranded DNA (anti-dsDNA) are believed to play a major role in SLE in general and so their significance in prediction and monitoring of glomerular inflammation is low. For prediction of renal flares and effective, well-timed therapy, it is required to have an appropriate marker available. In our study, we have tested sera of 85 SLE patients with or without LN. The criterion for LN determination was the degree of proteinuria (persistent proteinuria > 0.5 g/day, according to ACR criteria for LN). Disease activity was described by SLE disease index (SLEDAI) score, renal functions were stated according to British Isles Lupus Assessment Group score. There were anti-C1q, total anti-dsDNA and high-avidity anti-dsDNA detected in the patients’ sera. We did not find any significant difference in average SLEDAI value between patients with renal and non-renal organ complications. Positivity of anti-C1q was more frequent in patients with nephritis than in those without any history of renal disease (58.3 vs. 39.1%). Higher prevalence of these antibodies was evident in patients with clinically active LN than in those without renal improvement (73.1 vs. 39.1%). When comparing anti-C1q with antibodies against structures of DNA, significant differences were found in case of high avidity anti-dsDNA. Our results have confirmed the studies showing that anti-C1q antibodies could serve as a reliable serological marker of LN activity along with other laboratory tests. Detection of anti-C1q together with high avidity anti-dsDNA antibodies seems to be a good algorithm for the prediction of possible renal flares in SLE patients.
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Demethylation within the proximal promoter region of human estrogen receptor alpha gene correlates with its enhanced expression: Implications for female bias in lupus. Mol Immunol 2014; 61:28-37. [DOI: 10.1016/j.molimm.2014.05.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 04/28/2014] [Accepted: 05/02/2014] [Indexed: 11/19/2022]
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Lin HL, Yen JH, Chiou SS, Tsai WC, Ou TT, Wu CC, Liu HW, 林慧麗, 顏正賢, 邱世欣, 蔡文展, 歐燦騰, 吳正欽, 劉宏文. Estradiol upregulates calcineurin expression via overexpression of estrogen receptor alpha gene in systemic lupus erythematosus. Kaohsiung J Med Sci 2011; 27:125-31. [DOI: 10.1016/j.kjms.2010.12.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 11/04/2010] [Indexed: 01/10/2023] Open
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Rasmussen A, Sevier S, Kelly JA, Glenn SB, Aberle T, Cooney CM, Grether A, James E, Ning J, Tesiram J, Morrisey J, Powe T, Drexel M, Daniel W, Namjou B, Ojwang JO, Nguyen KL, Cavett JW, Te JL, James JA, Scofield RH, Moser K, Gilkeson GS, Kamen DL, Carson CW, Quintero-del-Rio AI, del Carmen Ballesteros M, Punaro MG, Karp DR, Wallace DJ, Weisman M, Merrill JT, Rivera R, Petri MA, Albert DA, Espinoza LR, Utset TO, Shaver TS, Arthur E, Anaya JM, Bruner GR, Harley JB. The lupus family registry and repository. Rheumatology (Oxford) 2010; 50:47-59. [PMID: 20864496 DOI: 10.1093/rheumatology/keq302] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The Lupus Family Registry and Repository (LFRR) was established with the goal of assembling and distributing materials and data from families with one or more living members diagnosed with SLE, in order to address SLE genetics. In the present article, we describe the problems and solutions of the registry design and biometric data gathering; the protocols implemented to guarantee data quality and protection of participant privacy and consent; and the establishment of a local and international network of collaborators. At the same time, we illustrate how the LFRR has enabled progress in lupus genetics research, answering old scientific questions while laying out new challenges in the elucidation of the biologic mechanisms that underlie disease pathogenesis. Trained staff ascertain SLE cases, unaffected family members and population-based controls, proceeding in compliance with the relevant laws and standards; participant consent and privacy are central to the LFRR's effort. Data, DNA, serum, plasma, peripheral blood and transformed B-cell lines are collected and stored, and subject to strict quality control and safety measures. Coded data and materials derived from the registry are available for approved scientific users. The LFRR has contributed to the discovery of most of the 37 genetic associations now known to contribute to lupus through 104 publications. The LFRR contains 2618 lupus cases from 1954 pedigrees that are being studied by 76 approved users and their collaborators. The registry includes difficult to obtain populations, such as multiplex pedigrees, minority patients and affected males, and constitutes the largest collection of lupus pedigrees in the world. The LFRR is a useful resource for the discovery and characterization of genetic associations in SLE.
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Affiliation(s)
- Astrid Rasmussen
- Arthritis and Immunology Research Program, Oklahoma Medical Research Foundation, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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Aggarwal R, Namjou B, Li S, D'Souza A, Tsao BP, Bruner BF, James JA, Scofield RH. Male-only systemic lupus. J Rheumatol 2010; 37:1480-7. [PMID: 20472921 DOI: 10.3899/jrheum.090726] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Systemic lupus erythematosus (SLE) is more common among women than men, a ratio of about 10 to 1. We undertook this study to describe familial male SLE within a large familial SLE cohort. METHODS SLE families (2 or more patients) were identified from the Lupus Multiplex Registry and Repository. Genomic DNA and blood samples were obtained using standard methods. Autoantibodies were determined by multiple methods. Medical records were abstracted for SLE clinical data. Fluorescent in situ hybridization (FISH) was performed with X and Y centromere-specific probes, and a probe specific for the Toll-like receptor 7 gene on the X chromosome. RESULTS Among 523 SLE families, we found 5 families in which all the SLE patients were male. FISH found no yaa gene equivalent in these families. SLE-unaffected primary female relatives from the 5 families with only-male SLE patients had a statistically increased rate of positive antinuclear antibodies compared to SLE-unaffected female relatives in other families. White men with SLE were 5 times more likely to have an offspring with SLE than White women with SLE, but there was no difference in this likelihood among Black men. CONCLUSION Because women in the all-male families had positive antinuclear antibodies, and men are more likely to have children with SLE, these data suggest genetic susceptibility factors that act only in men.
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Affiliation(s)
- Rachna Aggarwal
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
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Lu LJ, Wallace DJ, Navarra SV, Weisman MH. Lupus Registries: Evolution and Challenges. Semin Arthritis Rheum 2010; 39:224-45. [DOI: 10.1016/j.semarthrit.2008.08.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 08/07/2008] [Accepted: 08/25/2008] [Indexed: 11/27/2022]
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Lu LJ, Wallace DJ, Ishimori ML, Scofield RH, Weisman MH. Review: Male systemic lupus erythematosus: a review of sex disparities in this disease. Lupus 2009; 19:119-29. [PMID: 19946032 DOI: 10.1177/0961203309350755] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Although males with systemic lupus erythematosus (SLE) represent 4-22% of all SLE patients, it may not be appropriate that these cases should be subordinated to females with SLE in terms of most health-related issues. Over the past few decades, some distinctive features of male lupus have been observed with regard to genetic and environmental aspects of sex differences, clinical features, and outcome. In addition, recent insights into sex disparities in this disease have brought forth a few plausible and novel pathogenetic hypotheses. This review discusses these findings and sex disparities in SLE that appear to be especially noteworthy and pertinent to our understanding of male SLE.
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Affiliation(s)
- L-J Lu
- Cedars Sinai Medical Center, Los Angeles, California 90048, USA
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Osteopontin and systemic lupus erythematosus association: a probable gene-gender interaction. PLoS One 2008; 3:e0001757. [PMID: 18335026 PMCID: PMC2258418 DOI: 10.1371/journal.pone.0001757] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2007] [Accepted: 02/02/2008] [Indexed: 01/01/2023] Open
Abstract
Osteopontin (SPP1) is an important bone matrix mediator found to have key roles in inflammation and immunity. SPP1 genetic polymorphisms and increased osteopontin protein levels have been reported to be associated with SLE in small patient collections. The present study evaluates association between SPP1 polymorphisms and SLE in a large cohort of 1141 unrelated SLE patients [707 European-American (EA) and 434 African-American (AA)], and 2009 unrelated controls (1309 EA and 700 AA). Population-based case-control association analyses were performed. To control for potential population stratification, admixture adjusted logistic regression, genomic control (GC), structured association (STRAT), and principal components analysis (PCA) were applied. Combined analysis of 2 ethnic groups, showed the minor allele of 2 SNPs (rs1126616T and rs9138C) significantly associated with higher risk of SLE in males (P = 0.0005, OR = 1.73, 95% CI = 1.28–2.33), but not in females. Indeed, significant gene-gender interactions in the 2 SNPs, rs1126772 and rs9138, were detected (P = 0.001 and P = 0.0006, respectively). Further, haplotype analysis identified rs1126616T-rs1126772A-rs9138C which demonstrated significant association with SLE in general (P = 0.02, OR = 1.30, 95%CI 1.08–1.57), especially in males (P = 0.0003, OR = 2.42, 95%CI 1.51–3.89). Subgroup analysis with single SNPs and haplotypes also identified a similar pattern of gender-specific association in AA and EA. GC, STRAT, and PCA results within each group showed consistent associations. Our data suggest SPP1 is associated with SLE, and this association is especially stronger in males. To our knowledge, this report serves as the first association of a specific autosomal gene with human male lupus.
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Prasse A, Katic C, Germann M, Buchwald A, Zissel G, Müller-Quernheim J. Phenotyping Sarcoidosis from a Pulmonary Perspective. Am J Respir Crit Care Med 2008; 177:330-6. [DOI: 10.1164/rccm.200705-742oc] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Rybicki BA, Sinha R, Iyengar S, Gray-McGuire C, Elston RC, Iannuzzi MC. Genetic linkage analysis of sarcoidosis phenotypes: the sarcoidosis genetic analysis (SAGA) study. Genes Immun 2007; 8:379-86. [PMID: 17476268 DOI: 10.1038/sj.gene.6364396] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The sarcoidosis genetic analysis (SAGA) study previously identified eight chromosomal regions with suggestive evidence for linkage to sarcoidosis susceptibility in African-American sib pairs. Since the clinical course of sarcoidosis is variable and likely under genetic control, we used the affected relative pair portion of the SAGA sample (n=344 pairs) to perform multipoint linkage analyses with covariates based on pulmonary and organ involvement phenotypes. Chest radiographic resolution was the pulmonary phenotype with the highest LOD (logarithm of the backward odds, or likelihood ratio) score of 5.11 at D1S3720 on chromosome 1p36 (P=4 x 10(-5)). In general, higher LOD scores were attained for covariates that modeled clustered organ system involvement rather than individual organ systems, with the cardiac/renal group having the highest LOD score of 6.65 at chromosome 18q22 (P=2 x 10(-5)). The highest LOD scores for the other three organ involvement groups of liver/spleen/bone marrow, neuro/lymph and ocular/skin/joint were 3.72 at 10p11 (P=0.0004), 5.16 at 7p22 (P=4 x 10(-5)) and 2.93 at 10q26 (P=0.001), respectively. Most of the phenotype linkages did not overlap with the regions previously found linked to susceptibility. Our results suggest that genes influencing clinical presentation of sarcoidosis in African Americans are likely to be different from those that underlie disease susceptibility.
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Affiliation(s)
- B A Rybicki
- Department of Biostatistics and Research Epidemiology, Henry Ford Health System, Detroit, MI 48202, USA.
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Xing C, Sestak AL, Kelly JA, Nguyen KL, Bruner GR, Harley JB, Gray-McGuire C. Localization and replication of the systemic lupus erythematosus linkage signal at 4p16: interaction with 2p11, 12q24 and 19q13 in European Americans. Hum Genet 2006; 120:623-31. [PMID: 16983533 DOI: 10.1007/s00439-006-0248-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Accepted: 08/26/2006] [Indexed: 11/29/2022]
Abstract
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease characterized by both population and phenotypic heterogeneity. Our group previously identified linkage to SLE at 4p16 in European Americans (EA). In the present study we replicate this linkage effect in a new cohort of 76 EA families multiplex for SLE by model-free linkage analysis. Using densely spaced microsatellite markers in the linkage region, we have localized the potential SLE susceptibility gene(s) to be telomeric to the marker D4S2928 by haplotype construction. In addition, marker D4S394 showed marginal evidence of linkage disequilibrium with the putative disease locus by the transmission disequilibrium test and significant evidence of association using a family-based association approach as implemented in the program ASSOC. We also performed both two-point and multipoint model-based analyses to characterize the genetic model of the potential SLE susceptibility gene(s), and the lod scores both maximized under a recessive model with penetrances of 0.8. Finally, we performed a genome-wide scan of the total 153 EA pedigrees and evaluated the possibility of interaction between linkage signals at 4p16 and other regions in the genome. Fourteen regions on 11 chromosomes (1q24, 1q42, 2p11, 2q32, 3p14.2, 4p16, 5p15, 7p21, 8p22, 10q22, 12p11, 12q24, 14q12, 19q13) showed evidence of linkage, among which, signals at 2p11, 12q24 and 19q13 also showed evidence of interaction with that at 4p16. These results provide important additional information about the SLE linkage effect at 4p16 and offer a unique approach to uncovering susceptibility loci involved in complex human diseases.
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MESH Headings
- Chromosomes, Human, Pair 12
- Chromosomes, Human, Pair 19
- Chromosomes, Human, Pair 2
- Chromosomes, Human, Pair 4
- Europe/ethnology
- Female
- Genetic Linkage/genetics
- Genetic Predisposition to Disease/genetics
- Genome, Human
- Genotype
- Haplotypes
- Humans
- Lupus Erythematosus, Systemic/genetics
- Male
- Microsatellite Repeats/genetics
- Models, Genetic
- Pedigree
- United States
- White People/genetics
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Affiliation(s)
- Chao Xing
- Division of Genetic and Molecular Epidemiology, Department of Biostatistics and Epidemiology, Case Western Reserve University, Wolstein Research Building Rm 1312, 10900 Euclid Avenue, Cleveland, OH 44106-7281, USA.
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Forabosco P, Gorman JD, Cleveland C, Kelly JA, Fisher SA, Ortmann WA, Johansson C, Johanneson B, Moser KL, Gaffney PM, Tsao BP, Cantor RM, Alarcón-Riquelme ME, Behrens TW, Harley JB, Lewis CM, Criswell LA. Meta-analysis of genome-wide linkage studies of systemic lupus erythematosus. Genes Immun 2006; 7:609-14. [PMID: 16971955 DOI: 10.1038/sj.gene.6364338] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A genetic contribution to the development of systemic lupus erythematosus (SLE) is well established. Several genome-wide linkage scans have identified a number of putative susceptibility loci for SLE, some of which have been replicated in independent samples. This study aimed to identify the regions showing the most consistent evidence for linkage by applying the genome scan meta-analysis (GSMA) method. The study identified two genome-wide suggestive regions on 6p21.1-q15 and 20p11-q13.13 (P-value=0.0056 and P-value=0.0044, respectively) and a region with P-value<0.01 on 16p13-q12.2. The region on chromosome 6 contains the human leukocyte antigen cluster, and the chromosome 16 and 20 regions have been replicated in several cohorts. The potential importance of the identified genomic regions are also highlighted. These results, in conjunction with data emerging from dense single nucleotide polymorphism typing of specific regions or future genome-wide association studies will help guide efforts to identify the actual predisposing genetic variation contributing to this complex genetic disease.
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Affiliation(s)
- P Forabosco
- Department of Medical and Molecular Genetics, King's College London School of Medicine at Guy's, King's College and St Thomas' Hospitals, London, UK
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Ramos PS, Kelly JA, Gray-McGuire C, Bruner GR, Leiran AN, Meyer CM, Namjou B, Espe KJ, Ortmann WA, Reichlin M, Langefeld CD, James JA, Gaffney PM, Behrens TW, Harley JB, Moser KL. Familial aggregation and linkage analysis of autoantibody traits in pedigrees multiplex for systemic lupus erythematosus. Genes Immun 2006; 7:417-32. [PMID: 16775618 DOI: 10.1038/sj.gene.6364316] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Autoantibodies are clinically relevant biomarkers for numerous autoimmune disorders. The genetic basis of autoantibody production in systemic lupus erythematosus (SLE) and other autoimmune diseases is poorly understood. In this study, we characterized autoantibody profiles in 1,506 individuals from 229 multiplex SLE pedigrees. There was strong familial aggregation of antinuclear antibodies (ANAs), anti-double-stranded DNA (dsDNA), anti-La/SSB, anti-Ro/SSA, anti-Sm, anti-nRNP (nuclear ribonucleoprotein), IgM antiphospholipid (aPL) antibodies (Abs) and rheumatoid factor (RF) across these families enriched for lupus. We performed genome-wide linkage analyses in an effort to map genes that contribute to the production of the following autoantibodies: Ro/SSA, La/SSB, nRNP, Sm, dsDNA, RF, nuclear and phospholipids. Using an approach to minimize false positives and adjust for multiple comparisons, evidence for linkage was found to anti-La/SSB Abs on chromosome 3q21 (adjusted P=1.9 x 10(-6)), to anti-nRNP and/or anti-Sm Abs on chromosome 3q27 (adjusted P=3.5 x 10(-6)), to anti-Ro/SSA and/or anti-La/SSB Abs on chromosome 4q34-q35 (adjusted P=3.4 x 10(-4)) and to anti-IgM aPL Abs on chromosome 13q14 (adjusted P=2.3 x 10(-4)). These results support the hypothesis that autoantibody production is a genetically complex trait. Identification of the causative alleles will advance our understanding of critical molecular mechanisms that underlie SLE and perhaps other autoimmune diseases.
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Affiliation(s)
- P S Ramos
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN 55455, USA
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