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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Arthritis+Rheumatol
2016 ; 68
(7
): 1677-87
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Distinct Functions of Autoantibodies Against Interferon in Systemic Lupus
Erythematosus: A Comprehensive Analysis of Anticytokine Autoantibodies in Common
Rheumatic 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
PMID26815287
show ga
OBJECTIVE: 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. This study was
undertaken to examine the distinct functions of anticytokine autoantibodies in
patients with systemic lupus erythematosus (SLE) compared to patients with other
rheumatic diseases and healthy controls. METHODS: Serum samples from patients
with SLE (n?=?199), patients with primary Sjögren's syndrome (SS) (n?=?150),
patients with rheumatoid arthritis (RA) (n?=?149), and healthy controls (n?=?200)
were screened for 24 anticytokine autoantibodies using a multiplex bead-based
assay. To evaluate the biologic 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 a subset of healthy
controls and patients with SLE. RESULTS: Patients with SLE and those with SS had
a striking excess of autoantibodies against interferons and the
interferon-responsive chemokine interferon-inducible protein 10 (IP-10). Only
autoantibodies against type I interferon, interleukin-12 (IL-12), and IL-22
exhibited neutralizing activity. In SLE, the presence of anti-interferon-?
autoantibodies was correlated with more severe disease activity, higher levels of
anti-double-stranded DNA antibodies, and elevated expression of
interferon-?/?-inducible genes. Conversely, in SLE patients with blocking
anti-interferon-? autoantibodies, the type I interferon gene expression signature
was normalized. Anti-type III interferon autoantibodies (?2, ?3) and anti-IP-10
autoantibodies were newly recognized in SLE patient serum, and autoantibodies
against macrophage-colony stimulating factor, IL-4, IL-7, IL-17, and IL-22, none
of which have been previously identified in rheumatic conditions, were
discovered. CONCLUSION: Anticytokine autoantibodies are associated with distinct
patterns of disease in SLE, SS, and RA. Anti-interferon autoantibodies are
overrepresented in patients with SLE and those with SS, and fall into distinct
functional classes, with only a subset of anti-type I interferon antibodies
exhibiting neutralizing activity. Anti-interferon-? autoantibodies are correlated
with increased disease activity and interferon-related gene expression,
suggesting that such autoantibodies may contribute to the pathogenesis of SLE.