Green tea polyphenols ameliorate pancreatic injury in cerulein-induced murine acute pancreatitis.

Abstract:

OBJECTIVE:Green tea polyphenols (GTPs) are naturally occurring antioxidants acting through pathways that include reactive oxygen species and nuclear factor kappa B (NF-kappaB). This study investigates the effect of GTPs in a cerulein-induced murine model of acute pancreatitis (AP). METHODS:Male CD mice (median weight, 37.7 g) were divided into 4 groups: mice administered with cerulein alone, cerulein and GTP, saline alone (sham), and GTP alone. Acute pancreatitis was induced by serial intraperitoneal administration of cerulein (50 microg/kg, x6). Green tea polyphenol was administered intraperitoneally at 25 mg/kg on the first, third, and sixth hours after pancreatitis induction.We analyzed histologic and biochemical features of AP, NF-kappaB pathway activity, leukocyte-mediated damage, cytokine levels, oxidative stress injury, lipid peroxidation, expression of poly-(adenosine diphosphate-ribose) synthetase, and presence of apoptosis. RESULTS:Treatment with GTP reduced the histologic and biochemical features of AP. Western blot revealed significant NF-kappaB inactivation. Immunostaining for P selectin and intercellular adhesion molecule 1, tumor necrosis factor alpha, transforming growth factor beta, vascular endothelial growth factor, nitrotirosine, poly-(adenosine diphosphate ribose) synthetase, and malondialdheide levels were significantly reduced. There was a significant down-regulation of apoptotic markers. CONCLUSIONS:Our results demonstrated that GTP significantly ameliorated the effects of cerulein-induced AP in mice. These effects of GTP are mediated by actions at the NF-kappaB/IkB (inhibitor kB) proteins and oxidative stress pathways.

journal_name

Pancreas

journal_title

Pancreas

authors

Babu BI,Malleo G,Genovese T,Mazzon E,Di Paola R,Crisafulli C,Caminiti R,Siriwardena AK,Cuzzocrea S

doi

10.1097/MPA.0b013e3181b28d11

subject

Has Abstract

pub_date

2009-11-01 00:00:00

pages

954-67

issue

8

eissn

0885-3177

issn

1536-4828

journal_volume

38

pub_type

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