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2016 ; 7
(ä): 390
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Piperine Suppresses Pyroptosis and Interleukin-1? Release upon ATP Triggering and
Bacterial Infection
#MMPMID27812336
Liang YD
; Bai WJ
; Li CG
; Xu LH
; Wei HX
; Pan H
; He XH
; Ouyang DY
Front Pharmacol
2016[]; 7
(ä): 390
PMID27812336
show ga
Piperine is a phytochemical present in black pepper (Piper nigrum Linn) and other
related herbs, possessing a wide array of pharmacological activities including
anti-inflammatory effects. Previously, we demonstrated that piperine has
therapeutic effects on bacterial sepsis in mice, but the underlying mechanism has
not been fully elucidated. In this study, we aimed to investigate the influences
of piperine on pyroptosis in murine macrophages. The results showed that piperine
dose-dependently inhibited ATP-induced pyroptosis, thereby suppressing
interleukin-1? (IL-1?) or high mobility group box-1 protein (HMGB1) release in
LPS-primed bone marrow-derived macrophages and J774A.1 cells. Accompanying this,
ATP-induced AMP-activated protein kinase (AMPK) activation was greatly suppressed
by piperine, whereas AMPK agonist metformin counteracted piperine's inhibitory
effects on pyroptosis. Moreover, piperine administration greatly reduced both
peritoneal and serum IL-1? levels in the mouse model intraperitoneally infected
with Escherichia coli, suggestive of suppressing systemic inflammation and
pyroptosis. Our data indicated that piperine could protect macrophages from
pyroptosis and reduced IL-1? and HMGB1 release by suppressing ATP-induced AMPK
activation, suggesting that piperine may become a potential therapeutic agent
against bacterial sepsis.