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  1. Article ; Online: Genetics of rheumatoid arthritis.

    Padyukov, Leonid

    Seminars in immunopathology

    2022  Volume 44, Issue 1, Page(s) 47–62

    Abstract: Rheumatoid arthritis (RA) is an inflammatory autoimmune disease involving symmetric joints and is generally characterized by persistent pain, tenderness, and destruction of joints. The vast majority of RA patients produce autoantibodies, and immune cell ... ...

    Abstract Rheumatoid arthritis (RA) is an inflammatory autoimmune disease involving symmetric joints and is generally characterized by persistent pain, tenderness, and destruction of joints. The vast majority of RA patients produce autoantibodies, and immune cell involvement in disease development is well recognized, as is the contribution of other types of cells in synovial tissue, like fibroblasts. It is known that there are major genetic associations with the HLA locus, while multiple non-HLA genetic variants display relatively low risk of RA. Both HLA and non-HLA associations suggest that the profiles of genetic associations for autoantibody-positive vs. autoantibody-negative RA are different. Several alleles of HLA-DRB1 are associated with high risk for autoantibody-positive RA, with the strongest risk characterized by valine at position 11 of the protein sequence (HLA-DRB1*04 and *10 alleles). There is a strong protective effect for the risk of autoantibody-positive RA associated with HLA-DRB1*13 alleles. Although major genetic associations have been known for several years, understanding of the specific mechanisms in the development of increased risk of RA for these variations is work in progress. Current studies focus on the binding of immune receptors involved in recognition of putative peptides in activation of T cells, as well as investigation of cell signaling mechanisms. At least a part of RA risk could be explained by gene-gene and gene-environment interactions. There are currently more than 150 candidate loci with polymorphisms that associate with RA, mainly related to seropositive disease, and new discoveries are anticipated in the future from investigation of diverse human populations. This new research will help create a strong foundation for the continuing process of integrating genetic, epigenetic, transcriptomic, and proteomic data in studies of RA.
    MeSH term(s) Alleles ; Arthritis, Rheumatoid/etiology ; Arthritis, Rheumatoid/genetics ; Autoantibodies ; Genetic Predisposition to Disease ; HLA-DRB1 Chains/genetics ; Humans ; Proteomics
    Chemical Substances Autoantibodies ; HLA-DRB1 Chains
    Language English
    Publishing date 2022-01-27
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2316828-6
    ISSN 1863-2300 ; 1863-2297
    ISSN (online) 1863-2300
    ISSN 1863-2297
    DOI 10.1007/s00281-022-00912-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The importance of differences; On environment and its interactions with genes and immunity in the causation of rheumatoid arthritis.

    Klareskog, L / Rönnelid, J / Saevarsdottir, S / Padyukov, L / Alfredsson, L

    Journal of internal medicine

    2020  Volume 287, Issue 5, Page(s) 514–533

    Abstract: The current review uses rheumatoid arthritis (RA) as a prominent example for how studies on the interplay between environmental and genetic factors in defined subsets of a disease can be used to formulate aetiological hypotheses that subsequently can be ... ...

    Abstract The current review uses rheumatoid arthritis (RA) as a prominent example for how studies on the interplay between environmental and genetic factors in defined subsets of a disease can be used to formulate aetiological hypotheses that subsequently can be tested for causality using molecular and functional studies. Major discussed findings are that exposures to airways from many different noxious agents including cigarette smoke, silica dust and more interact with major susceptibility genes, mainly HLA-DR genetic variants in triggering antigen-specific immune reactions specific for RA. We also discuss how several other environmental and lifestyle factors, including microbial, neural and metabolic factors, can influence risk for RA in ways that are different in different subsets of RA.The description of these processes in RA provides the best example so far in any immune-mediated disease of how triggering of immunity at one anatomical site in the context of known environmental and genetic factors subsequently can lead to symptoms that precede the classical inflammatory disease symptoms and later contribute also to the classical RA joint inflammation. The findings referred to in the review have led to a change of paradigms for very early therapy and prevention of RA and to efforts towards what we have named 'personalized prevention'. We believe that the progress described here for RA will be of relevance for research and practice also in other immune-mediated diseases.
    MeSH term(s) Arthritis, Rheumatoid/etiology ; Arthritis, Rheumatoid/genetics ; Arthritis, Rheumatoid/immunology ; Gene-Environment Interaction ; Genetic Predisposition to Disease/genetics ; Humans ; Life Style ; Risk Factors
    Language English
    Publishing date 2020-03-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 96274-0
    ISSN 1365-2796 ; 0954-6820
    ISSN (online) 1365-2796
    ISSN 0954-6820
    DOI 10.1111/joim.13058
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Analysis of IGH allele content in a sample group of rheumatoid arthritis patients demonstrates unrevealed population heterogeneity.

    Hardt, Uta / Corcoran, Martin M / Narang, Sanjana / Malmström, Vivianne / Padyukov, Leonid / Karlsson Hedestam, Gunilla B

    Frontiers in immunology

    2023  Volume 14, Page(s) 1073414

    Abstract: Immunoglobulin heavy chain (IGH) germline gene variations influence the B cell receptor repertoire, with resulting biological consequences such as shaping our response to infections and altering disease susceptibilities. However, the lack of information ... ...

    Abstract Immunoglobulin heavy chain (IGH) germline gene variations influence the B cell receptor repertoire, with resulting biological consequences such as shaping our response to infections and altering disease susceptibilities. However, the lack of information on polymorphism frequencies in the IGH loci at the population level makes association studies challenging. Here, we genotyped a pilot group of 30 individuals with rheumatoid arthritis (RA) to examine IGH allele content and frequencies in this group. Eight novel IGHV alleles and one novel IGHJ allele were identified in the study. 15 cases were haplotypable using heterozygous IGHJ6 or IGHD anchors. One variant, IGHV4-34*01_S0742, was found in three out of 30 cases and included a single nucleotide change resulting in a non-canonical recombination signal sequence (RSS) heptamer. This variant allele, shown by haplotype analysis to be non-expressed, was also found in three out of 30 healthy controls and matched a single nucleotide polymorphism (SNP) described in the 1000 Genomes Project (1KGP) collection with frequencies that varied between population groups. Our finding of previously unreported alleles in a relatively small group of individuals with RA illustrates the need for baseline information about IG allelic frequencies in targeted study groups in preparation for future analysis of these genes in disease association studies.
    MeSH term(s) Humans ; Immunoglobulin Heavy Chains/genetics ; Alleles ; Genes, Immunoglobulin Heavy Chain ; Arthritis, Rheumatoid/genetics ; Polymorphism, Single Nucleotide
    Chemical Substances Immunoglobulin Heavy Chains
    Language English
    Publishing date 2023-01-31
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1073414
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Response to Comment "Sex-specific exposures and sex-combined outcomes in two-sample Mendelian randomization may mislead the causal inference" on "Age at menarche, age at natural menopause, and risk of rheumatoid arthritis-a Mendelian randomization study".

    Zhu, Jingjing / Niu, Zheng / Alfredsson, Lars / Klareskog, Lars / Padyukov, Leonid / Jiang, Xia

    Arthritis research & therapy

    2022  Volume 24, Issue 1, Page(s) 239

    MeSH term(s) Male ; Female ; Humans ; Menarche/genetics ; Mendelian Randomization Analysis ; Menopause/genetics ; Genome-Wide Association Study ; Arthritis, Rheumatoid/genetics
    Language English
    Publishing date 2022-10-26
    Publishing country England
    Document type Letter ; Comment
    ZDB-ID 2107602-9
    ISSN 1478-6362 ; 1478-6354
    ISSN (online) 1478-6362
    ISSN 1478-6354
    DOI 10.1186/s13075-022-02923-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Report of the 60th annual meeting of the American Society of Human Genetics: several steps toward discoveries.

    Padyukov, Leonid

    Genome medicine

    2010  Volume 2, Issue 12, Page(s) 89

    Abstract: A report of the 60th annual meeting of the American Society of Human Genetics in Washington, DC, USA, 2-6 November 2010. ...

    Abstract A report of the 60th annual meeting of the American Society of Human Genetics in Washington, DC, USA, 2-6 November 2010.
    Language English
    Publishing date 2010-12-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 2484394-5
    ISSN 1756-994X ; 1756-994X
    ISSN (online) 1756-994X
    ISSN 1756-994X
    DOI 10.1186/gm210
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  6. Article ; Online: Journal club. A human geneticist explores genetic diversity in Asia.

    Padyukov, Leonid

    Nature

    2010  Volume 464, Issue 7289, Page(s) 653

    Language English
    Publishing date 2010-04-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/464653e
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  7. Article: Functional link between sarcoidosis-associated gene variants and quantitative levels of bronchoalveolar lavage fluid cell types.

    Abo Al Hayja, Muntasir / Kullberg, Susanna / Eklund, Anders / Padyukov, Leonid / Grunewald, Johan / Rivera, Natalia V

    Frontiers in medicine

    2023  Volume 10, Page(s) 1061654

    Abstract: Background: Sarcoidosis is an inflammatory disease that affects multiple organs. Cell analysis from bronchoalveolar lavage fluid (BALF) is a valuable tool in the diagnostic workup and differential diagnosis of sarcoidosis. Besides the expansion of ... ...

    Abstract Background: Sarcoidosis is an inflammatory disease that affects multiple organs. Cell analysis from bronchoalveolar lavage fluid (BALF) is a valuable tool in the diagnostic workup and differential diagnosis of sarcoidosis. Besides the expansion of lymphocyte expression-specific receptor segments (Vα2.3 and Vβ22) in some patients with certain HLA types, the relation between sarcoidosis susceptibility and BAL cell populations' quantitative levels is not well-understood.
    Methods: Quantitative levels defined by cell concentrations of BAL cells and CD4
    Results: Multiple genetic variants associated with sarcoidosis were significantly associated with quantitative levels of BAL cells. Specifically, LS genetic variants, mainly from the HLA locus, were associated with quantitative levels of BAL macrophages, lymphocytes, CD3
    Conclusion: Genetic variants associated with sarcoidosis are likely to modulate quantitative levels of BAL cell types and may regulate gene expression in immune cell populations. Thus, the role of sarcoidosis-associated gene-variants may be to influence cellular phenotypes underlying the disease immunopathology.
    Language English
    Publishing date 2023-02-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2775999-4
    ISSN 2296-858X
    ISSN 2296-858X
    DOI 10.3389/fmed.2023.1061654
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Haplotype-Specific Expression Analysis of MHC Class II Genes in Healthy Individuals and Rheumatoid Arthritis Patients.

    Houtman, Miranda / Hesselberg, Espen / Rönnblom, Lars / Klareskog, Lars / Malmström, Vivianne / Padyukov, Leonid

    Frontiers in immunology

    2021  Volume 12, Page(s) 707217

    Abstract: ... HLA- ... ...

    Abstract HLA-DRB1
    MeSH term(s) Aged ; Alleles ; Arthritis, Rheumatoid/genetics ; Arthritis, Rheumatoid/immunology ; Female ; HLA-DQ Antigens/genetics ; HLA-DRB1 Chains/genetics ; Haplotypes ; Humans ; Middle Aged
    Chemical Substances HLA-DQ Antigens ; HLA-DRB1 Chains
    Language English
    Publishing date 2021-08-17
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2021.707217
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  9. Article ; Online: Age at menarche, age at natural menopause, and risk of rheumatoid arthritis - a Mendelian randomization study.

    Zhu, Jingjing / Niu, Zheng / Alfredsson, Lars / Klareskog, Lars / Padyukov, Leonid / Jiang, Xia

    Arthritis research & therapy

    2021  Volume 23, Issue 1, Page(s) 108

    Abstract: Background: Hormonal reproductive factors have been suggested to play an important role in the etiology of rheumatoid arthritis (RA), an autoimmune inflammatory disorder affecting primarily women. We conducted a two-sample Mendelian randomization (MR) ... ...

    Abstract Background: Hormonal reproductive factors have been suggested to play an important role in the etiology of rheumatoid arthritis (RA), an autoimmune inflammatory disorder affecting primarily women. We conducted a two-sample Mendelian randomization (MR) study examining three relevant exposures, age at menarche (AAM), age at natural menopause (ANM), and age at first birth (AFB) with the risk of RA.
    Methods: We collected summary statistics from the hitherto largest GWAS conducted in AAM (N = 329,345), ANM (N = 69,360), AFB (N = 251,151), and RA (N
    Results: We did not find any evidence in support for a causal association between genetically predicted reproductive factors and risk of RA (OR
    Conclusions: Our MR study does not convincingly support a casual effect of reproductive factors, as reflected by age at menarche, age at menopause, and age at first birth, on the development of RA. Despite the largely augmented set of instruments we used, these instruments only explained a modest proportion of phenotypic variance of exposures. Our knowledge regarding this topic is still insufficient and future studies with larger sample size should be designed to replicate or dispute our findings.
    MeSH term(s) Arthritis, Rheumatoid/epidemiology ; Arthritis, Rheumatoid/genetics ; Female ; Genome-Wide Association Study ; Humans ; Menarche/genetics ; Mendelian Randomization Analysis ; Menopause/genetics ; Polymorphism, Single Nucleotide/genetics
    Language English
    Publishing date 2021-04-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2107602-9
    ISSN 1478-6362 ; 1478-6354
    ISSN (online) 1478-6362
    ISSN 1478-6354
    DOI 10.1186/s13075-021-02495-x
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  10. Article ; Online: Clinical characteristics of Vietnamese patients with idiopathic inflammatory myopathies and autoantibodies to aminoacyl-transfer RNA synthetases.

    Phuong, Thuy Nguyen Thi / Ngoc, Lan Nguyen Thi / Rönnelid, Johan / Padyukov, Leonid / Lundberg, Ingrid E

    International journal of rheumatic diseases

    2021  Volume 24, Issue 5, Page(s) 663–670

    Abstract: Objective: To assess clinical phenotypes of anti-aminoacyl-transfer RNA synthetases (aaRS) autoantibodies in Vietnamese patients of Kinh ethnicity with idiopathic inflammatory myopathies (IIM).: Methods: In a cross-sectional study 23 patients with ... ...

    Abstract Objective: To assess clinical phenotypes of anti-aminoacyl-transfer RNA synthetases (aaRS) autoantibodies in Vietnamese patients of Kinh ethnicity with idiopathic inflammatory myopathies (IIM).
    Methods: In a cross-sectional study 23 patients with anti-aaRS autoantibodies were compared to 36 patients with other myositis-specific antibodies and to 69 seronegative patients with IIM. Assessments included muscle performance, extra-muscular involvement, and disease activity according to the International Myositis Assessment and Clinical Studies (IMACS). Sera were tested by a line immunoassay (Euroline Myositis Profile 4).
    Results: The frequency of anti-Jo-1 antibodies was 56.5%, anti-EJ antibodies 26.1%, and anti-PL-7 antibodies 17.4%, while anti-PL-12 and anti-OJ antibodies were not present in any case. All patients with anti-aaRS autoantibodies had signs of myositis. At time of investigation 22/23 patients had muscle weakness, 52.2% arthritis, 34.8% Raynaud's phenomenon, 73.9% fever, 14.3% mechanic's hands and 56.5% dysphagia. Interstitial lung disease was present in 52.2%, and pulmonary hypertension in 56.5%. The anti-aaRS autoantibody positive group had higher disease activity in the domains of skin and pulmonary disease compared to the seronegative group and had lower disease activity in skeletal disease compared to the anti-melanoma differentiation-associated protein 5-positive patients. The clinical presentation of antisynthetase syndrome was similar between the aaRS autoantibody specificities with the exception of more frequent pulmonary hypertension in anti-Jo-1 positive patients.
    Conclusions: Different aaRS autoantibody specificities may vary between different ethnic populations for reasons that still need to be clarified. Furthermore, the high frequency of pulmonary hypertension is noteworthy but otherwise clinical manifestations associated with aaRS autoantibodies did not differ from other ethnic populations.
    MeSH term(s) Adult ; Aged ; Amino Acyl-tRNA Synthetases/immunology ; Antibodies, Antinuclear/blood ; Asian Continental Ancestry Group ; Autoantibodies/blood ; Autoantibodies/immunology ; Cross-Sectional Studies ; Female ; Humans ; Male ; Middle Aged ; Myositis/diagnosis ; Myositis/epidemiology ; Vietnam/epidemiology
    Chemical Substances Anti-Jo-1 autoantibody ; Antibodies, Antinuclear ; Autoantibodies ; Amino Acyl-tRNA Synthetases (EC 6.1.1.-)
    Language English
    Publishing date 2021-03-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 2426924-4
    ISSN 1756-185X ; 1756-1841
    ISSN (online) 1756-185X
    ISSN 1756-1841
    DOI 10.1111/1756-185X.14105
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