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2016 ; 20
(2
): 147-52
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Curcumin protects against the intestinal ischemia-reperfusion injury: involvement
of the tight junction protein ZO-1 and TNF-? related mechanism
#MMPMID26937210
Tian S
; Guo R
; Wei S
; Kong Y
; Wei X
; Wang W
; Shi X
; Jiang H
Korean J Physiol Pharmacol
2016[Mar]; 20
(2
): 147-52
PMID26937210
show ga
Present study aimed to investigate the eff ect of curcumin-pretreatment on
intestinal I/R injury and on intestinal mucosa barrier. Thirty Wistar rats were
randomly divided into: sham, I/R, and curcumin groups (n=10). Animals in curcumin
group were pretreated with curcumin by gastric gavage (200 mg/kg) for 2 days
before I/R. Small intestine tissues were prepared for Haematoxylin & Eosin (H&E)
staining. Serum diamine oxidase (DAO) and tumor necrosis factor (TNF)-? levels
were measured. Expression of intestinal TNF-? and tight junction protein (ZO-1)
proteins was detected by Western blot and/or immunohistochemistry. Serum DAO
level and serum and intestinal TNF-? leves were signifi cantly increased after
I/R, and the values were markedly reduced by curcumin pretreatment although still
higher than that of sham group (p<0.05 or p<0.001). H&E staining showed the
significant injury to intestinal mucosa following I/R, and curcumin pretreatment
signifi cantly improved the histological structure of intestinal mucosa. I/R
insult also induced significantly down-regulated expression of ZO-1, and the eff
ect was dramatically attenuated by curcumin-pretreatment. Curcumin may protect
the intestine from I/R injury through restoration of the epithelial structure,
promotion of the recovery of intestinal permeability, as well as enhancement of
ZO-1 protein expression, and this eff ect may be partly attributed to the TNF-?
related pathway.