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2016 ; 6
(ä): 32587
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Colchicine prevents NSAID-induced small intestinal injury by inhibiting
activation of the NLRP3 inflammasome
#MMPMID27585971
Otani K
; Watanabe T
; Shimada S
; Takeda S
; Itani S
; Higashimori A
; Nadatani Y
; Nagami Y
; Tanaka F
; Kamata N
; Yamagami H
; Tanigawa T
; Shiba M
; Tominaga K
; Fujiwara Y
; Arakawa T
Sci Rep
2016[Sep]; 6
(ä): 32587
PMID27585971
show ga
The inflammasome is a large, multiprotein complex that consists of a
nucleotide-binding oligomerization domain-like receptor (NLR), an
apoptosis-associated speck-like protein containing a caspase recruitment domain,
and pro-caspase-1. Activation of the inflammasome results in cleavage of
pro-caspase-1 into cleaved caspase-1, which promotes the processing of
pro-interleukin (IL)-1? into mature IL-1?. We investigated the effects of
colchicine on non-steroidal anti-inflammatory drug (NSAID)-induced small
intestinal injury and activation of the NLR family pyrin domain-containing 3
(NLRP3) inflammasome. Colchicine treatment inhibited indomethacin-induced small
intestinal injury by 86% (1?mg/kg) and 94% (3?mg/kg) as indicated by the lesion
index 24?h after indomethacin administration. Colchicine inhibited the protein
expression of cleaved caspase-1 and mature IL-1?, without affecting the mRNA
expression of NLRP3 and IL-1?. Although treatment with recombinant IL-1?
(0.1??g/kg) did not change the severity of small intestinal damage, the
preventive effects of colchicine were abolished by supplementation with the same
dose of recombinant IL-1?. Indomethacin-induced small intestinal damage was
reduced by 77%, as determined by the lesion index in NLRP3(-/-) mice, and
colchicine treatment failed to inhibit small intestinal damage in NLRP3(-/-)
mice. These results demonstrate that colchicine prevents NSAID-induced small
intestinal injury by inhibiting activation of the NLRP3 inflammasome.