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10.1080/08916930400010611 http://scihub22266oqcxt.onion/10.1080/08916930400010611 C4624307!4624307 !15621569     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=15621569 &cmd=llinks): Failed to open stream: HTTP request failed! 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Ongoing immunoglobulin class switch DNA recombination in lupus B cells: analysis of switch regulatory regions |pdf=|usr=}}{{15621569 }} gab.com Text Ongoing immunoglobulin class switch DNA recombination in lupus B cells: analysis of switch regulatory regions JO: Autoimmunity http://www.kidney.de/pget.php?&tw=1&pmid=15621569 #FOAvip Inflammation and tissue damage in systemic lupus erythematosus (SLE) are mediated by class-switched autoantibodies reactive with nucleic acids, nucleic acid-binding proteins, phospholipids and other self-antigens. While some healthy individuals produce IgM antibodies with specificities similar to those of lupus patients, immunoglobulin class switching to mature downstream isotypes appears to be required for the generation of pathogenic autoantibodies. To characterize the cellular and molecular basis of pathogenic autoantibody production in SLE, we studied the capacity of peripheral blood B cells of naive phenotype from patients with SLE, rheumatoid arthritis (RA) or healthy control subjects to spontaneously switch to IgG and IgA. In addition, we determined the DNA sequences of the upstream evolutionary conserved sequence (ECS)-Igamma promoter regulatory regions that control germline IH-CH transcription and class switch DNA recombination (CSR) to IgG1, IgG2 and IgG4. IgM+IgD+ B cells from patients with SLE, but not those from RA or healthy control subjects, underwent spontaneous CSR, as assessed by expression of germline Igamma1-Cgamma1, Igamma2-Cgamma2, Igamma3-Cgamma3, Igamma4-Cgamma4 and Ialpha1-Calpha1 transcripts, mature (switched) VHDJH-Cgamma1, VHDJH-Cgamma2, VHDJH-Cgamma3 and VHDJH-Calpha1 transcripts and secreted IgG and IgA. Although polymorphic DNA sequences were identified in the ECS-Igamma1, ECS-Igamma2 and ECS-Igamma4 promoter regions, the transcription factor-binding sites that mediate germline Igamma-Cgamma transcription were conserved in patients and controls. However, distinct patterns of nuclear protein binding to an ECS-Igamma promoter sequence that contains both positive and negative regulatory elements were observed in SLE patients and controls. These results support a role for exogenous signals, such as through CD40 ligation, rather than altered genomic sequence, in the increased production of class switched autoantibodies in SLE. Twit Text FOAVip Ongoing immunoglobulin class switch DNA recombination in lupus B cells: analysis of switch regulatory regions ????Autoimmunity http://www.kidney.de/pget.php?&tw=1&pmid=15621569 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=15621569 #FOAvip English Wikipedia <ref>{{Cite pmid|15621569 }}</ref> Ongoing immunoglobulin class switch DNA recombination in lupus B cells: analysis of switch regulatory regions #MMPMID15621569 Liu S ; Cerutti A ; Casali P ; Crow MK Autoimmunity 2004[Sep]; 37 (6-7 ): 431-443 PMID15621569 show ga Inflammation and tissue damage in systemic lupus erythematosus (SLE) are mediated by class-switched autoantibodies reactive with nucleic acids, nucleic acid-binding proteins, phospholipids and other self-antigens. While some healthy individuals produce IgM antibodies with specificities similar to those of lupus patients, immunoglobulin class switching to mature downstream isotypes appears to be required for the generation of pathogenic autoantibodies. To characterize the cellular and molecular basis of pathogenic autoantibody production in SLE, we studied the capacity of peripheral blood B cells of naive phenotype from patients with SLE, rheumatoid arthritis (RA) or healthy control subjects to spontaneously switch to IgG and IgA. In addition, we determined the DNA sequences of the upstream evolutionary conserved sequence (ECS)-Igamma promoter regulatory regions that control germline IH-CH transcription and class switch DNA recombination (CSR) to IgG1, IgG2 and IgG4. IgM+IgD+ B cells from patients with SLE, but not those from RA or healthy control subjects, underwent spontaneous CSR, as assessed by expression of germline Igamma1-Cgamma1, Igamma2-Cgamma2, Igamma3-Cgamma3, Igamma4-Cgamma4 and Ialpha1-Calpha1 transcripts, mature (switched) VHDJH-Cgamma1, VHDJH-Cgamma2, VHDJH-Cgamma3 and VHDJH-Calpha1 transcripts and secreted IgG and IgA. Although polymorphic DNA sequences were identified in the ECS-Igamma1, ECS-Igamma2 and ECS-Igamma4 promoter regions, the transcription factor-binding sites that mediate germline Igamma-Cgamma transcription were conserved in patients and controls. However, distinct patterns of nuclear protein binding to an ECS-Igamma promoter sequence that contains both positive and negative regulatory elements were observed in SLE patients and controls. These results support a role for exogenous signals, such as through CD40 ligation, rather than altered genomic sequence, in the increased production of class switched autoantibodies in SLE. |*Gene Rearrangement, B-Lymphocyte/immunology [MESH] |Base Sequence [MESH] |Gene Expression Regulation/immunology [MESH] |Genes, Regulator [MESH] |Humans [MESH] |Immunoglobulin Class Switching/*genetics/immunology [MESH] |Immunoglobulin D/genetics/immunology [MESH] |Immunoglobulin Isotypes/genetics/immunology [MESH] |Immunoglobulin M/genetics/immunology [MESH] |Lupus Erythematosus, Systemic/*immunology [MESH] |Molecular Sequence Data [MESH] |Polymorphism, Genetic [MESH]Ongoing immunoglobulin class switch DNA recombination in lupus B cells(epmc).pdf DeepDyve Pubget Overpricing