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2017 ; 8
(6
): e2866
Nephropedia Template TP
gab.com Text
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English Wikipedia
ARRDC4 regulates enterovirus 71-induced innate immune response by promoting K63
polyubiquitination of MDA5 through TRIM65
#MMPMID28594402
Meng J
; Yao Z
; He Y
; Zhang R
; Zhang Y
; Yao X
; Yang H
; Chen L
; Zhang Z
; Zhang H
; Bao X
; Hu G
; Wu T
; Cheng J
Cell Death Dis
2017[Jun]; 8
(6
): e2866
PMID28594402
show ga
Enterovirus 71 (EV71) is the main causative agent of hand, foot and mouth disease
(HFMD), which induces significantly elevated levels of cytokines and chemokines,
leading to local or system inflammation and severe complications, whereas the
underlying regulatory mechanisms and the inflammatory pathogenesis remain
elusive. ARRDC4 is one member of arrestins family, having important roles in
glucose metabolism and G-protein-coupled receptors (GPCRs) related physiological
and pathological processes, however, the function of ARRDC4 in innate immune
system is largely unknown. Here we identified that ARRDC4 expression was
increased after EV71 infection in THP-1-derived macrophages and verified in
EV71-infected HFMD patients and the healthy candidates. The expression level of
ARRDC4 was positively correlated with the serum concentration of IL-6, TNF-? and
CCL3 in clinical specimens. ARRDC4 interacted with MDA5 via the arrestin-like N
domain, and further recruited TRIM65 to enhance the K63 ubiquitination of MDA5,
resulting in activation of the downstream innate signaling pathway and
transcription of proinflammatory cytokines during EV71 infection. Our data
highlight new function of ARRDC4 in innate immunity, contributing to the better
understanding about regulation of MDA5 activation after EV71 infection, and also
suggest ARRDC4 may serve as a potential target for intervention of EV71-induced
inflammatory response.