Pharmaceutical Research

, Volume 22, Issue 11, pp 1805–1820

Comparison of (−)-Epigallocatechin-3-Gallate Elicited Liver and Small Intestine Gene Expression Profiles Between C57BL/6J Mice and C57BL/6J/Nrf2 (−/−) Mice

  • Guoxiang Shen
  • Changjiang Xu
  • Rong Hu
  • Mohit R. Jain
  • Sujit Nair
  • Wen Lin
  • Chung S. Yang
  • Jefferson Y. Chan
  • A.-N. Tony Kong
Research Paper

DOI: 10.1007/s11095-005-7546-8

Cite this article as:
Shen, G., Xu, C., Hu, R. et al. Pharm Res (2005) 22: 1805. doi:10.1007/s11095-005-7546-8

Purpose

This study was conducted to study global gene expression profiles elicited by (−)-epigallocatechin-3-gallate (EGCG) in mouse liver and small intestine, as well as to identify EGCG-regulated Nrf2-dependent genes.

Methods

C57BL/6J and C57BL/6J/Nrf2(−/−) mice were given an oral dose of EGCG at 200 mg/kg or treated with vehicle. Both liver and small intestine were collected 3 h and 12 h after treatment. Total RNA was extracted from the tissues and gene expression profiles were analyzed using Affymetrix mouse genome 430 2.0 array and GeneSpring 6.1 software. Microarray data were validated using quantitative real-time reverse transcription-PCR chain reaction analysis.

Results

Genes that were either induced or suppressed more than two fold by EGCG treatment compared with vehicle treatment in the same genotype group were filtered using the GeneSpring software. Among these well-defined genes, 671 EGCG-regulated Nrf2-dependent genes and 256 EGCG-regulated Nrf2-independent genes were identified in liver, whereas 228 EGCG-regulated Nrf2-dependent genes and 98 EGCG-regulated Nrf2-independent genes were identified in the small intestine. Based on their biological functions, these genes mainly fall into the category of ubiquitination and proteolysis, electron transport, detoxification, transport, cell growth and apoptosis, cell adhesion, kinase and phosphatases, and transcription factors.

Conclusions

Genes expressed in mouse liver are more responsive to oral treatment of EGCG than those expressed in small intestine. EGCG could regulate many genes in both organs in an Nrf2-dependent manner. The identification of genes related to detoxification, transport, cell growth and apoptosis, cell adhesion, kinase, and transcription regulated by EGCG not only provide potential novel insight into the effect of EGCG on global gene expression and chemopreventive effects, but also point to the potential role of Nrf2 in these processes.

Key Words

chemoprevention (−)-epigallocatechin-3-gallate global gene expression profile microarray nuclear factor E2-related factor 2 

Abbreviations

ABC

ATP-binding cassette

ALOX

arachidonate 12-lipoxygenase

ARE

antioxidant response element

DNMT

DNA methyltransferases

EGCG

(−)-epigallocatechin-3-gallate

IGF-1R

insulin-like growth factor 1 receptor gene

MAPK

mitogen-activated protein kinase

MMP

matrix metalloprotease

NF-κB

nuclear factor kappa B

Nrf2

nuclear factor E2-related factor 2

NOS

nitric oxide synthase

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  • Guoxiang Shen
    • 1
  • Changjiang Xu
    • 2
  • Rong Hu
    • 1
  • Mohit R. Jain
    • 2
  • Sujit Nair
    • 1
  • Wen Lin
    • 1
  • Chung S. Yang
    • 1
    • 3
    • 4
  • Jefferson Y. Chan
    • 5
  • A.-N. Tony Kong
    • 1
    • 2
    • 4
  1. 1.Graduate Program in Pharmaceutical Science, Ernest Mario School of Pharmacy, RutgersThe State University of New JerseyPiscatawayUSA
  2. 2.Department of Pharmaceutics, Ernest Mario School of Pharmacy, RutgersThe State University of New JerseyPiscatawayUSA
  3. 3.Department of Chemical Biology, Ernest Mario School of Pharmacy, RutgersThe State University of New JerseyPiscatawayUSA
  4. 4.Center for Cancer Prevention Research, Ernest Mario School of Pharmacy, RutgersThe State University of New JerseyPiscatawayUSA
  5. 5.Department of PathologyUniversity of CaliforniaIrvineUSA

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