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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+Res+Ther
2016 ; 18
(1
): 264
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English Wikipedia
Circulating exosomes from patients with systemic lupus erythematosus induce an
proinflammatory immune response
#MMPMID27852323
Lee JY
; Park JK
; Lee EY
; Lee EB
; Song YW
Arthritis Res Ther
2016[Nov]; 18
(1
): 264
PMID27852323
show ga
BACKGROUND: Exosomes are involved in intercellular communication. The aim of this
study was to investigate whether circulating exosomes effectively contribute to
the inflammatory response in systemic lupus erythematosus (SLE). METHODS:
Exosomes were purified from SLE patients and healthy controls (HCs). Healthy
peripheral blood mononuclear cells (PBMCs) were stimulated with exosomes isolated
from SLE patients and HCs in the presence or absence of Toll-like receptor (TLR)
inhibitors. Production of interferon (IFN)-?, tumor necrosis factor (TNF)-?,
interleukin (IL)-1?, and IL-6 were measured. Correlation between exosome levels
and SLE disease activity was examined. RESULTS: The serum exosomes levels were
significantly higher in SLE patients than in HCs. SLE exosomes induced a higher
production of IFN-?, TNF-?, IL-1?, and IL-6 compared to healthy exosomes. SLE
serum that was depleted of exosomes and SLE exosomes that were mechanically
disrupted failed to induce any significant cytokine production. Exosome-mediated
production of TNF-?, IL-1?, and IL-6 was decreased by the TLR4 antagonist,
whereas that of IFN-? was suppressed by the TLR1/2, TLR7, and TLR9 antagonists.
Exosome levels correlated with disease activity in SLE patients (rho?=?0.846,
p?=?0.008). CONCLUSIONS: The circulating exosomes are immunologically active and
their levels correlate with disease activity in SLE patients. The circulating
exosomes might serve as novel biomarkers of SLE disease activity.