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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 J+Autoimmun
2016 ; 74
(ä): 182-193
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Dysregulation of innate and adaptive serum mediators precedes systemic lupus
erythematosus classification and improves prognostic accuracy of autoantibodies
#MMPMID27338520
Lu R
; Munroe ME
; Guthridge JM
; Bean KM
; Fife DA
; Chen H
; Slight-Webb SR
; Keith MP
; Harley JB
; James JA
J Autoimmun
2016[Nov]; 74
(ä): 182-193
PMID27338520
show ga
Systemic lupus erythematosus (SLE) is a complex autoimmune disease with a poorly
understood preclinical stage of immune dysregulation and symptom accrual.
Accumulation of antinuclear autoantibody (ANA) specificities is a hallmark of
impending clinical disease. Yet, many ANA-positive individuals remain healthy,
suggesting that additional immune dysregulation underlies SLE pathogenesis.
Indeed, we have recently demonstrated that interferon (IFN) pathways are
dysregulated in preclinical SLE. To determine if other forms of immune
dysregulation contribute to preclinical SLE pathogenesis, we measured
SLE-associated autoantibodies and soluble mediators in samples from 84
individuals collected prior to SLE classification (average timespan = 5.98
years), compared to unaffected, healthy control samples matched by race, gender,
age (±5 years), and time of sample procurement. We found that multiple soluble
mediators, including interleukin (IL)-5, IL-6, and IFN-?, were significantly
elevated in cases compared to controls more than 3.5 years pre-classification,
prior to or concurrent with autoantibody positivity. Additional mediators,
including innate cytokines, IFN-associated chemokines, and soluble tumor necrosis
factor (TNF) superfamily mediators increased longitudinally in cases approaching
SLE classification, but not in controls. In particular, levels of B lymphocyte
stimulator (BLyS) and a proliferation-inducing ligand (APRIL) were comparable in
cases and controls until less than 10 months pre-classification. Over the entire
pre-classification period, random forest models incorporating ANA and anti-Ro/SSA
positivity with levels of IL-5, IL-6, and the IFN-?-induced chemokine, MIG,
distinguished future SLE patients with 92% (±1.8%) accuracy, compared to 78%
accuracy utilizing ANA positivity alone. These data suggest that immune
dysregulation involving multiple pathways contributes to SLE pathogenesis.
Importantly, distinct immunological profiles are predictive for individuals who
will develop clinical SLE and may be useful for delineating early pathogenesis,
discovering therapeutic targets, and designing prevention trials.