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Icaritin exhibits anti-inflammatory effects in the mouse peritoneal macrophages and peritonitis model.

Abstract：

:Icaritin, an intestinal metabolite of prenylflavonoids from Herba Epimedii, has been known to regulate many cellular processes. The purpose of this study was to investigate the protective effects of icaritin on inflammation in lipopolysaccharide (LPS) stimulated mouse peritoneal macrophages in vitro and zymosan induced peritonitis model in vivo. The release of Nitric oxide (NO) was measured by a Griess reagent system. The phagocytosis, the expression of CD69, the production of inflammatory cytokines and the leukocytes numbers were determined by flow cytometry. The Ca(2+) influx was recorded by confocal microscopy. The phosphorylation of p38, c-Jun N-terminal kinase (JNK), and extracellular signal-regulated kinase (ERK) was determined by Western blot. The results showed that icaritin significantly inhibited the NO, IL-6, IL-10 TNF-α, and MCP-1 production both in vitro and in vivo. Icaritin efficiently diminished the uptake of nonopsonized pHrodo™-labeled Escherichia coli bacteria on the LPS-stimulated macrophages. In addition, icaritin significantly inhibited the expression of CD69 on CD11b(+) macrophages. Icaritin pretreatment significantly inhibited the elevation of intracellular Ca(2+) induced by LPS. Furthermore, icaritin markedly decreased phospho-p38 and JNK protein expression in LPS-stimulated mouse peritoneal macrophages. In vivo study, it was also observed that icaritin prolonged survival of peritonitis mice, and inhibited massive leukocyte influx into the peritoneal cavity. These results suggest that icaritin possesses significant anti-inflammatory effects that may be mediated through the regulation of inflammatory cytokines and phosphorylation of p38 and JNK.

journal_name

Int Immunopharmacol

journal_title

International immunopharmacology

authors

Lai X,Ye Y,Sun C,Huang X,Tang X,Zeng X,Yin P,Zeng Y

doi

10.1016/j.intimp.2013.03.025

subject

Has Abstract

pub_date

2013-05-01 00:00:00

pages

41-9

issue

1

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(13)00119-7

journal_volume

16

pub_type

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