SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Alfredsson Lars) ;lar1:(uu)"

Sökning: WFRF:(Alfredsson Lars) > Uppsala universitet

  • Resultat 1-10 av 84
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Sigurdsson, Snaevar, et al. (författare)
  • Association of a Haplotype in the Promoter Region of the Interferon Regulatory Factor 5 Gene With Rheumatoid Arthritis
  • 2007
  • Ingår i: Arthritis and Rheumatism. - : Wiley. - 0004-3591 .- 1529-0131. ; 56:7, s. 2202-2210
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective. To determine whether genetic variants of the interferon regulatory factor 5 (IRF-5) and Tyk-2 genes are associated with rheumatoid arthritis (RA). Methods. Five single-nucleotide polymorphisms (SNPs) in IRF5 and 3 SNPs in Tyk2 were analyzed in a Swedish cohort of 1,530 patients with RA and 881 controls. A replication study was performed in a Dutch cohort of 387 patients with RA and 181 controls. All patient sera were tested for the presence of autoantibodies against cyclic citrullinated peptides (anti-CCP). Results. Four of the 5 SNPs located in the 5' region of IRF5 were associated with RA, while no association was observed with the Tyk2 SNPs. The minor alleles of 3 of the IRF5 SNPs, which were in linkage disequilibrium and formed a relatively common haplotype with a frequency of ∼0.33, appeared to confer protection against RA. Although these disease associations were seen in the entire patient group, they were mainly found in RA patients who were negative for anti-CCP. A suggestive association of IRF5 SNPs with anti-CCP-negative RA was also observed in the Dutch cohort. Conclusion. Given the fact that anti-CCP-negative RA differs from anti-CCP-positive RA with respect to genetic and environmental risk factor profiles, our results indicate that genetic variants of IRF5 contribute to a unique disease etiology and pathogenesis in anti-CCP-negative RA.
  •  
2.
  •  
3.
  • Smedby, Karin E., et al. (författare)
  • GWAS of Follicular Lymphoma Reveals Allelic Heterogeneity at 6p21.32 and Suggests Shared Genetic Susceptibility with Diffuse Large B-cell Lymphoma
  • 2011
  • Ingår i: PLoS Genetics. - : Public Library of Science (PLoS). - 1553-7390 .- 1553-7404. ; 7:4, s. e1001378-
  • Tidskriftsartikel (refereegranskat)abstract
    • Non-Hodgkin lymphoma (NHL) represents a diverse group of hematological malignancies, of which follicular lymphoma (FL) is a prevalent subtype. A previous genome-wide association study has established a marker, rs10484561 in the human leukocyte antigen (HLA) class II region on 6p21.32 associated with increased FL risk. Here, in a three-stage genome-wide association study, starting with a genome-wide scan of 379 FL cases and 791 controls followed by validation in 1,049 cases and 5,790 controls, we identified a second independent FL-associated locus on 6p21.32, rs2647012 (ORcombined = 0.64, P-combined= 2x10(-21)) located 962 bp away from rs10484561 (r(2)< 0.1 in controls). After mutual adjustment, the associations at the two SNPs remained genome-wide significant (rs2647012: ORadjusted = 0.70, P-adjusted= 4x10(-12); rs10484561: ORadjusted = 1.64, P-adjusted= 5x10(-15)). Haplotype and coalescence analyses indicated that rs2647012 arose on an evolutionarily distinct haplotype from that of rs10484561 and tags a novel allele with an opposite (protective) effect on FL risk. Moreover, in a follow-up analysis of the top 6 FL-associated SNPs in 4,449 cases of other NHL subtypes, rs10484561 was associated with risk of diffuse large B-cell lymphoma (ORcombined = 1.36, P-combined = 1.4x10(-7)). Our results reveal the presence of allelic heterogeneity within the HLA class II region influencing FL susceptibility and indicate a possible shared genetic etiology with diffuse large B-cell lymphoma. These findings suggest that the HLA class II region plays a complex yet important role in NHL.
  •  
4.
  • Grönwall, Caroline, et al. (författare)
  • A Comprehensive Evaluation of the Relationship Between Different IgG and IgA Anti-Modified Protein Autoantibodies in Rheumatoid Arthritis
  • 2021
  • Ingår i: Frontiers in Immunology. - : Frontiers Media S.A.. - 1664-3224. ; 12
  • Tidskriftsartikel (refereegranskat)abstract
    • Seropositive rheumatoid arthritis (RA) is characterized by the presence of rheumatoid factor (RF) and anti-citrullinated protein autoantibodies (ACPA) with different fine-specificities. Yet, other serum anti-modified protein autoantibodies (AMPA), e.g. anti-carbamylated (Carb), -acetylated (KAc), and malondialdehyde acetaldehyde (MAA) modified protein antibodies, have been described. In this comprehensive study, we analyze 30 different IgG and IgA AMPA reactivities to Cit, Carb, KAc, and MAA antigens detected by ELISA and autoantigen arrays in N=1985 newly diagnosed RA patients. Association with patient characteristics such as smoking and disease activity were explored. Carb and KAc reactivities by different assays were primarily seen in patients also positive for anti-citrulline reactivity. Modified vimentin (mod-Vim) peptides were used for direct comparison of different AMPA reactivities, revealing that IgA AMPA recognizing mod-Vim was mainly detected in subsets of patients with high IgG anti-Cit-Vim levels and a history of smoking. IgG reactivity to acetylation was mainly detected in a subset of patients with Cit and Carb reactivity. Anti-acetylated histone reactivity was RA-specific and associated with high anti-CCP2 IgG levels, multiple ACPA fine-specificities, and smoking status. This reactivity was also found to be present in CCP2+ RA-risk individuals without arthritis. Our data further demonstrate that IgG autoreactivity to MAA was increased in RA compared to controls with highest levels in CCP2+ RA, but was not RA-specific, and showed low correlation with other AMPA. Anti-MAA was instead associated with disease activity and was not significantly increased in CCP2+ individuals at risk of RA. Notably, RA patients could be subdivided into four different subsets based on their AMPA IgG and IgA reactivity profiles. Our serology results were complemented by screening of monoclonal antibodies derived from single B cells from RA patients for the same antigens as the RA cohort. Certain CCP2+ clones had Carb or Carb+KAc+ multireactivity, while such reactivities were not found in CCP2- clones. We conclude that autoantibodies exhibiting different patterns of ACPA fine-specificities as well as Carb and KAc reactivity are present in RA and may be derived from multireactive B-cell clones. Carb and KAc could be considered reactivities within the "Cit-umbrella" similar to ACPA fine-specificities, while MAA reactivity is distinctly different.
  •  
5.
  • Hedström, Anna Karin, et al. (författare)
  • Complex Relationships of Smoking, HLA-DRB1 Genes, and Serologic Profiles in Patients With Early Rheumatoid Arthritis : Update From a Swedish Population-Based Case-Control Study
  • 2019
  • Ingår i: Arthritis & Rheumatology. - : WILEY. - 2326-5191 .- 2326-5205. ; 71:9, s. 1504-1511
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective Smoking is associated with an increased risk of rheumatoid arthritis (RA) in subsets of patients defined according to the presence or absence of anti-citrullinated protein antibodies (ACPAs) and rheumatoid factors (RFs). Moreover, an interaction between smoking and the HLA-DRB1 shared epitope (SE) has been demonstrated to be a risk factor for seropositive RA. The aim of this study was to investigate the interplay between smoking and the HLA-DRB1 SE with regard to risk of RA in different patient subsets based on ACPA and RF status. Methods Incident cases of RA (3,645 cases, 5,883 matched controls) were divided into 4 subgroups based on the presence or absence of RF and anti-cyclic citrullinated peptide 2 (anti-CCP2) antibodies. The influence of smoking on the risk of disease was determined in each RA subgroup, using logistic regression models with calculation of odds ratios and 95% confidence intervals (95% CIs). The potential interaction between smoking and HLA-DRB1 SE genes was evaluated by calculating the attributable proportion due to interaction (AP). Results In the RF+/anti-CCP2+ subset of RA patients, both smoking and the presence of the HLA-DRB1 SE conferred independent disease risks, and there was a strong interaction between the 2 risk factors (AP 0.4, 95% CI 0.3, 0.5). In the RF-/anti-CCP2+ patient subset, the HLA-DRB1 SE conferred an increased risk of RA, whereas the independent influence of smoking was limited. However, there was a significant interaction between the HLA-DRB1 SE and smoking (AP 0.2, 95% CI 0.02, 0.5). In the RF+/anti-CCP2- patient subset, there was an increased risk of disease among smokers, which was only marginally affected by the presence of the HLA-DRB1 SE, and no interaction between the 2 factors was observed (AP 0.002, 95% CI -0.3, 0.3). In the RF-/anti-CCP2- patient subset, neither smoking nor the presence of the HLA-DRB1 SE conferred an increased risk of RA. Conclusion These findings demonstrate different effects of smoking and HLA-DRB1 in the 4 serologically defined RA subsets.
  •  
6.
  •  
7.
  • Klareskog, Lars, et al. (författare)
  • Genes, environment and immunity in the development of rheumatoid arthritis
  • 2006
  • Ingår i: Current Opinion in Immunology. - : Elsevier BV. - 0952-7915 .- 1879-0372. ; 18:6, s. 650-655
  • Tidskriftsartikel (refereegranskat)abstract
    • The combined role of genes, environment and immunity in the development of rheumatoid arthritis (RA) has been the subject of recent investigations. New data support a gene-environment interaction between smoking and the MHC class II HLA-DRB1 shared epitope (SE) genes in anti-citrulline antibody (anti-CP(+)) RA but not in anti-CP(-) disease. These data from genetic epidemiology, together with information on citrullination in the lungs of smokers, have prompted the formulation of a new etiological hypothesis for anti-CP(+) RA, suggesting that smoking in the context of HLA-DR SE might trigger immunity to citrulline-modified proteins and that this immunity, after several years, might cause arthritis.
  •  
8.
  • Klareskog, Lars, et al. (författare)
  • Immunity to Citrullinated Proteins in Rheumatoid Arthritis
  • 2008
  • Ingår i: Annual Review of Immunology. - : Annual Reviews. - 0732-0582 .- 1545-3278. ; 26, s. 651-675
  • Forskningsöversikt (refereegranskat)abstract
    • Antibodies to citrullinated proteins (ACPA), i.e., to peptides posttranslationally modified by the conversion of arginine to citrulline, are specific serological markers for rheumatoid arthritis (RA). Studies on anticitrulline immunity, summarized in this review, demonstrate that the criterion-based syndrome RA should be subdivided into at least two distinct subsets (ACPA-positive and ACPA-negative disease). A new etiological model is proposed for ACPA-positive RA, built on MHC class II-dependent activation of adaptive immunity. Fundamentals of this model include the following: (a) ACPA antedate onset of arthritis; (b) ACPA may aggravate arthritis in rodents; (c) ACPA are triggered in the context of genes that confer susceptibility to RA (HLA-DRB1 SE) and by environmental agents triggering RA (smoking or bacterial stimuli); (d) ACPA may complex with citrullinated proteins present in target tissue as part of a multistep process for arthritis development. The model provides a new basis for molecular studies on the pathogenesis of ACPA-positive arthritis.
  •  
9.
  • Källberg, Henrik, et al. (författare)
  • Gene-gene and gene-environment interactions involving HLA-DRB1, PTPN22, and smoking in two subsets of rheumatoid arthritis
  • 2007
  • Ingår i: American Journal of Human Genetics. - : Elsevier BV. - 0002-9297 .- 1537-6605. ; 80:5, s. 867-875
  • Tidskriftsartikel (refereegranskat)abstract
    • Gene-gene and gene-environment interactions are key features in the development of rheumatoid arthritis (RA) and other complex diseases. The aim of this study was to use and compare three different definitions of interaction between the two major genetic risk factors of RA—the HLA-DRB1 shared epitope (SE) alleles and the PTPN22 R620W allele—in three large case-control studies: the Swedish Epidemiological Investigation of Rheumatoid Arthritis (EIRA) study, the North American RA Consortium (NARAC) study, and the Dutch Leiden Early Arthritis Clinic study (in total, 1,977 cases and 2,405 controls). The EIRA study was also used to analyze interactions between smoking and the two genes. “Interaction” was defined either as a departure from additivity, as interaction in a multiplicative model, or in terms of linkage disequilibrium—for example, deviation from independence of penetrance of two unlinked loci. Consistent interaction, defined as departure from additivity, between HLA-DRB1 SE alleles and the A allele of PTPN22 R620W was seen in all three studies regarding anti-CCP–positive RA. Testing for multiplicative interactions demonstrated an interaction between the two genes only when the three studies were pooled. The linkage disequilibrium approach indicated a gene-gene interaction in EIRA and NARAC, as well as in the pooled analysis. No interaction was seen between smoking and PTPN22 R620W. A new pattern of interactions is described between the two major known genetic risk factors and the major environmental risk factor concerning the risk of developing anti-CCP–positive RA. The data extend the basis for a pathogenetic hypothesis for RA involving genetic and environmental factors. The study also raises and illustrates principal questions concerning ways to define interactions in complex diseases.
  •  
10.
  • Källberg, Henrik, et al. (författare)
  • Smoking is a major preventable risk factor for rheumatoid arthritis : estimations of risks after various exposures to cigarette smoke
  • 2011
  • Ingår i: Annals of the Rheumatic Diseases. - : BMJ. - 0003-4967 .- 1468-2060. ; 70:3, s. 508-511
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Earlier studies have demonstrated that smoking and genetic risk factors interact in providing an increased risk of rheumatoid arthritis (RA). Less is known on how smoking contributes to RA in the context of genetic variability, and what proportion of RA may be caused by smoking. Objectives To determine the association between the amount of smoking and risk of RA in the context of different HLA-DRB1 shared epitope (SE) alleles, and to estimate proportions of RA cases attributed to smoking. Design, Setting and Participants Data from the Swedish Epidemiological Investigation of Rheumatoid Arthritis (EIRA) case-control study encompassing 1204 cases and 871 controls were analysed. Main Outcome Measure Estimated OR to develop RA and excess fraction of cases attributable to smoking according to the amount of smoking and genotype. Results Smoking was estimated to be responsible for 35% of anticitrullinated protein/peptide antibody (ACPA)positive cases. For each HLA-DRB1 SE genotype, smoking was dose-dependently associated with an increased risk of ACPA-positive RA (p trend <0.001). In individuals carrying two copies of the HLA-DRB1 SE, 55% of ACPA-positive RA was attributable to smoking. Conclusions Smoking is a preventable risk factor for RA. The increased risk due to smoking is dependent on the amount of smoking and genotype.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 84
Typ av publikation
tidskriftsartikel (79)
annan publikation (2)
rapport (1)
forskningsöversikt (1)
bokkapitel (1)
Typ av innehåll
refereegranskat (77)
övrigt vetenskapligt/konstnärligt (7)
Författare/redaktör
Alfredsson, Lars (72)
Klareskog, Lars (28)
Rönnelid, Johan (23)
Padyukov, Leonid (16)
Vingård, Eva (15)
Skillgate, Eva (10)
visa fler...
Josephson, Malin (10)
Hansson, Monika (8)
Bengtsson, Camilla (7)
Olsson, Tomas (7)
Alfredsson, Joakim (7)
Kockum, Ingrid (7)
Wolk, Alicja (6)
Jernberg, Tomas (6)
de Faire, Ulf (6)
Källberg, Henrik (6)
Hallqvist, Johan, 19 ... (5)
Holmdahl, Rikard (5)
Magnusson, Cecilia (5)
Hillert, Jan (5)
Syvänen, Ann-Christi ... (4)
Khademi, Mohsen (4)
Ding, Bo (4)
Wallentin, Lars, 194 ... (4)
Westerholm, Peter (4)
Askling, Johan (4)
Yndigegn, Troels (4)
Lindberg, Per (4)
Holm, Lena W. (4)
Westerlind, Helga (4)
Tuomi, Tiinamaija (3)
Groop, Leif (3)
Hallqvist, Johan (3)
Wahren-Herlenius, Ma ... (3)
Erlinge, David (3)
Rönnblom, Lars (3)
Catrina, Anca I (3)
Moradi, Tahereh (3)
Andersson, Tomas (3)
Eriksson, Per (3)
Hamsten, Anders (3)
Szummer, Karolina (3)
Theorell, Töres (3)
Swahn, Eva (3)
Knutsson, Anders (3)
Fransson, Eleonor (3)
Liljedahl, Ulrika (3)
Carlsson, Sofia (3)
Kellerth, Thomas (3)
Jagodic, Maja (3)
visa färre...
Lärosäte
Karolinska Institutet (50)
Linköpings universitet (7)
Umeå universitet (6)
Lunds universitet (6)
Stockholms universitet (3)
visa fler...
Jönköping University (2)
Mittuniversitetet (2)
Göteborgs universitet (1)
Högskolan i Gävle (1)
visa färre...
Språk
Engelska (83)
Svenska (1)
Forskningsämne (UKÄ/SCB)
Medicin och hälsovetenskap (44)
Naturvetenskap (4)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy