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- RA33 abstract "RA33, also known as heterogeneous nuclear ribonucleoprotein A2/B1 is an autoantigen in human autoimmune diseases.In 1989, a novel class of autoantibodies were detected in sera of patients with rheumatoid arthritis (RA) which were directed to a protein with an estimated molecular mass of approximately 33 kDa contained in nuclear extracts from HeLa cells. The antigen was therefore given the name RA33. Protein sequencing of highly purified RA33 revealed that it was identical to the hetergoneous nuclear ribonucleoprotein A2 (hnRPA2B1). Nowadays, the name anti-RA33 defines autoantibodies that are directed to hnRNP-A2 and its splice variant hnRNP-B1. Anti-RA33 occur in approximately 30-35% of patients with RA, in 20-25% of patients with systemic lupus erythematosus and in 35-40% of patients with mixed connective tissue disease, being rare or absent in other arthritic conditions with a non-autoimmune etiology. Anti-RA33 can be easily detected by immunoblotting employing crude nuclear extracts or the recombinant antigen. Fo routine diagnostics also ELISA can be employed which is somewhat less sensitive than immunoblotting. The use of indirect immunofluorescence is of limited usefulness for detecting anti-RA33. The pathogenic role of anti-RA33 is not fully understood. Anti-RA33 and T cells directed against RA33, that can be found in about 60% of RA patients might contribute to autoimmune inflammation by immune complex formation or by virtue of secretion of cytokines that may initiate and drive the pathogenic process. Of note, anti-RA33 are detectable already in the earliest disease stage of RA or even years before the onset of actual clinical disease. The positive predictive value of anti-RA33 is 74%. However, anti-RA33 are not associated with bone erosions or disease activity. In the absence of rheumatoid factor and anti-citrullinated protein antibody they are associated with a milder disease course of RA rather.".
- RA33 wikiPageID "17716635".
- RA33 wikiPageLength "2952".
- RA33 wikiPageOutDegree "16".
- RA33 wikiPageRevisionID "532105575".
- RA33 wikiPageWikiLink Anti-citrullinated_protein_antibody.
- RA33 wikiPageWikiLink Anti–citrullinated_protein_antibody.
- RA33 wikiPageWikiLink Autoantibodies.
- RA33 wikiPageWikiLink Autoantibody.
- RA33 wikiPageWikiLink Autoimmune_disease.
- RA33 wikiPageWikiLink Autoimmune_diseases.
- RA33 wikiPageWikiLink Category:Autoantigens.
- RA33 wikiPageWikiLink Cytokine.
- RA33 wikiPageWikiLink Cytokines.
- RA33 wikiPageWikiLink ELISA.
- RA33 wikiPageWikiLink HeLa.
- RA33 wikiPageWikiLink HnRPA2B1.
- RA33 wikiPageWikiLink Immune_complex.
- RA33 wikiPageWikiLink Immunoblotting.
- RA33 wikiPageWikiLink Mixed_connective_tissue_disease.
- RA33 wikiPageWikiLink Positive_and_negative_predictive_values.
- RA33 wikiPageWikiLink Positive_predictive_value.
- RA33 wikiPageWikiLink Rheumatoid_arthritis.
- RA33 wikiPageWikiLink Rheumatoid_factor.
- RA33 wikiPageWikiLink Systemic_lupus_erythematosus.
- RA33 wikiPageWikiLink T_cell.
- RA33 wikiPageWikiLink T_cells.
- RA33 wikiPageWikiLink Western_blot.
- RA33 wikiPageWikiLinkText "RA33".
- RA33 wikiPageWikiLinkText "hnRNPA2/B1".
- RA33 hasPhotoCollection RA33.
- RA33 wikiPageUsesTemplate Template:Reflist.
- RA33 subject Category:Autoantigens.
- RA33 hypernym Autoantigen.
- RA33 comment "RA33, also known as heterogeneous nuclear ribonucleoprotein A2/B1 is an autoantigen in human autoimmune diseases.In 1989, a novel class of autoantibodies were detected in sera of patients with rheumatoid arthritis (RA) which were directed to a protein with an estimated molecular mass of approximately 33 kDa contained in nuclear extracts from HeLa cells. The antigen was therefore given the name RA33.".
- RA33 label "RA33".
- RA33 sameAs m.047m265.
- RA33 sameAs Q7274954.
- RA33 sameAs Q7274954.
- RA33 wasDerivedFrom RA33?oldid=532105575.
- RA33 isPrimaryTopicOf RA33.