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2016 ; 6
(ä): 28370
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Alpinetin attenuates inflammatory responses by suppressing TLR4 and NLRP3
signaling pathways in DSS-induced acute colitis
#MMPMID27321991
He X
; Wei Z
; Wang J
; Kou J
; Liu W
; Fu Y
; Yang Z
Sci Rep
2016[Jun]; 6
(ä): 28370
PMID27321991
show ga
Alpinetin, a composition of Alpinia katsumadai Hayata, has been reported to have
a number of biological properties, such as antibacterial, antitumor and other
important therapeutic activities. However, the effect of alpinetin on
inflammatory bowel disease (IBD) has not yet been reported. The purpose of this
study was to investigate the anti-inflammatory effect and mechanism of alpinetin
on dextran sulfate sodium (DSS)-induced colitis in mice. In vivo, DSS-induced
mice colitis model was established by giving mice drinking water containing 5%
(w/v) DSS for 7 days. Alpinetin (25, 50 and 100 mg/kg) were administered once a
day by intraperitoneal injection 3 days before DSS treatment. In vitro, phorbol
myristate acetate (PMA)-differentiated monocytic THP-1 macrophages were treated
with alpinetin and stimulated by lipopolysaccharide (LPS). The results showed
that alpinetin significantly attenuated diarrhea, colonic shortening,
histological injury, myeloperoxidase (MPO) activity and the expressions of tumor
necrosis factor (TNF-?) and interleukin (IL-1?) production in mice. In vitro,
alpinetin markedly inhibited LPS-induced TNF-? and IL-1? production, as well as
Toll-like receptor 4 (TLR4) mediated nuclear transcription factor-kappaB (NF-?B)
and NOD-like receptor protein 3 (NLRP3) inflammasome activation. In conclusion,
this study demonstrated that alpinetin had protective effects on DSS-induced
colitis and may be a promising therapeutic reagent for colitis treatment.