Pomegranate Phytoconstituents Blunt The Inflammatory Cascade In A Chemically Induced Rodent Model Of Hepatocellular Carcinogenesis

Title

Pomegranate Phytoconstituents Blunt The Inflammatory Cascade In A Chemically Induced Rodent Model Of Hepatocellular Carcinogenesis

Creator

Bishayee A; Thoppil R J; Darvesh A S; Ohanyan V; Meszaros J G; Bhatia D

Publisher

Journal of Nutritional Biochemistry

Date

2013
2013-01

Description

Liver cancer, predominantly hepatocellular carcinoma (HCC), represents a complex and fatal malignancy driven primarily by oxidative stress and inflammation. Due to dismal prognosis and limited therapeutic intervention, chemoprevention has emerged as a viable approach to reduce the morbidity and mortality of HCC. Pomegranate fruit is a rich source of phytochemicals endowed with potent antioxidant and anti-inflammatory properties. We previously reported that pomegranate phytochemicals inhibit diethylnitrosamine (DENA)-initiated hepatocarcinogenesis in rats though nuclear factor E2-related factor 2 (Nrf2)-mediated antioxidant mechanisms. Since Nrf2 also acts as a key mediator of the nuclear factor-kappaB (NF-kappa B)-regulated inflammatory pathway, our present study investigated the anti-inflammatory mechanisms of a pomegranate emulsion (PE) during DENA-induced rat hepatocarcinogenesis. Rats were administered with PE (1 or 10 g/kg) 4 weeks before and 18 weeks following DENA initiation. There was a significant increase in hepatic expressions of inducible nitric oxide synthase, 3-nitrotyrosine, heat shock protein 70 and 90, cyclooxygenase-2 and NF-kappa B in DENA-exposed rat livers. PE dose-dependently suppressed all aforementioned elevated inflammatory markers. A conspicuous finding of this study involves lack of cardiotoxicity of PE as assessed by monitoring cardiac function using noninvasive echocardiography. Our results provide substantial evidence that suppression of the inflammatory cascade through modulation of NF-kappa B signaling pathway may represent a novel mechanism of liver tumor inhibitory effects of PE against experimental hepatocarcinogenesis. Data presented here coupled with those of our earlier study underline the importance of simultaneously targeting two interconnected molecular circuits, namely, Nrf2-mediated redox signaling and NF-kappa B-regulated inflammatory pathway, by pomegranate phytoconstituents to achieve chemoprevention of HCC. (C) 2013 Elsevier Inc. All rights reserved.

Subject

Biochemistry & Molecular Biology; cancer chemoprevention; Chemoprevention; cyclooxygenase-2; cyclooxygenase-2; factor-kappa-b; gene-expression; heat-shock proteins; hepatocarcinogenesis; human-disease; Inflammation; inhibitors; molecular chaperones; nitric-oxide synthase; Nuclear factor-kappaB; Nutrition & Dietetics; oxidative stress; Pomegranate; punica-granatum l.

Format

Journal Article or Conference Abstract Publication

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Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

178-187

Issue

1

Volume

24

Citation

Bishayee A; Thoppil R J; Darvesh A S; Ohanyan V; Meszaros J G; Bhatia D, “Pomegranate Phytoconstituents Blunt The Inflammatory Cascade In A Chemically Induced Rodent Model Of Hepatocellular Carcinogenesis,” NEOMED Bibliography Database, accessed January 27, 2021, https://neomed.omeka.net/items/show/9987.

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