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Deprecated: Implicit conversion from float 300.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Arthritis+Rheumatol 2016 ; 68 (7): 1677-87 Nephropedia Template TP
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Distinct Functions of Anti-interferon Autoantibodies in Systemic Lupus Erythematosus: A Comprehensive Analysis of Anticytokine Autoantibodies in Common Rheumatologic Diseases #MMPMID26815287
Gupta S; Tatouli IP; Rosen LB; Hasni S; Alevizos I; Manna ZG; Rivera J; Jiang C; Siegel RM; Holland SM; Moutsopoulos HM; Browne SK
Arthritis Rheumatol 2016[Jul]; 68 (7): 1677-87 PMID26815287show ga
Background: Anticytokine autoantibodies occur across a range of hematologic, pulmonary and infectious diseases, however, systematic investigation of their presence and significance in autoimmune diseases is lacking. Methods: Serum samples from patients with systemic lupus erythematosus (SLE) (n=199), primary Sjögren?s syndrome (SS) (n=150), rheumatoid arthritis (RA) (n=149) and healthy controls (n=200) were screened for 24 anticytokine autoantibodies using a multiplex bead-based assay. To evaluate biological activity of anticytokine autoantibodies, their ability to block cytokine-induced signal transduction or protein expression was measured. RNA sequencing was performed on whole blood in subset of controls and SLE patients. Results: SLE and SS patients had striking excess of autoantibodies against interferons and the interferon-responsive chemokine interferon-inducible-protein-10 (IP-10). Only autoantibodies against type I interferon, interleukin (IL)-12 and IL-22 exhibited neutralizing activity. In SLE, anti-interferon-? autoantibodies tracked with more disease activity, anti-double-stranded-DNA antibodies, and elevated expression of interferon-?/?-inducible genes. Conversely, SLE patients with blocking anti-interferon-? autoantibodies normalized their type I interferon gene expression signature. Anti-type III interferons (?2, ?3), and anti-IP-10 autoantibodies were newly recognized and autoantibodies against macrophage-colony stimulating factor, IL-4, IL-7, IL-17 and IL-22, that have not been previously identified in rheumatologic conditions, were discovered. Conclusions: Anticytokine autoantibodies were associated with distinct patterns of SLE, SS and RA. Anti-interferon autoantibodies were overrepresented in SLE and SS and fall into distinct functional classes with only a subset of anti-type I interferon antibodies exhibiting neutralizing activity. Anti-interferon-? autoantibodies correlated with increased disease activity and interferon-related gene expression, suggesting that they may contribute to the pathogenesis of SLE.