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PMID: 16959035 Published · epublish English Journal Article Research Support, Non-U.S. Gov't Validation Study

Identification of genes regulated by Wnt/beta-catenin pathway and involved in apoptosis via microarray analysis.

BMC cancer ·Vol. 6 ·2006-09-07 ·Pages 221

Huang M, Wang Y, Sun D, Zhu H, Yin Y, Zhang W, Yang S, Quan L, Bai J, Wang S, Chen Q, Li S, Xu N

Abstract

Wnt/beta-catenin pathway has critical roles in development and oncogenesis. Although significant progress has been made in understanding the downstream signaling cascade of this pathway, little is known regarding Wnt/beta-catenin pathway modification of the cellular apoptosis. To identify potential genes regulated by Wnt/beta-catenin pathway and involved in apoptosis, we used a stably integrated, inducible RNA interference (RNAi) vector to specific inhibit the expression and the transcriptional activity of beta-catenin in HeLa cells. Meanwhile, we designed an oligonucleotide microarray covering 1384 apoptosis-related genes. Using oligonucleotide microarrays, a series of differential expression of genes was identified and further confirmed by RT-PCR. Stably integrated inducible RNAi vector could effectively suppress beta-catenin expression and the transcriptional activity of beta-catenin/TCF. Meanwhile, depletion of beta-catenin in this manner made the cells more sensitive to apoptosis. 130 genes involved in some important cell-apoptotic pathways, such as PTEN-PI3K-AKT pathway, NF-kappaB pathway and p53 pathway, showed significant alteration in their expression level after the knockdown of beta-catenin. Coupling RNAi knockdown with microarray and RT-PCR analyses proves to be a versatile strategy for identifying genes regulated by Wnt/beta-catenin pathway and for a better understanding the role of this pathway in apoptosis. Some of the identified beta-catenin/TCF directed or indirected target genes may represent excellent targets to limit tumor growth.

MeSH Terms
Apoptosis/genetics Cluster Analysis Down-Regulation HeLa Cells Humans Oligonucleotide Array Sequence Analysis/methods RNA Interference/physiology Signal Transduction/genetics T Cell Transcription Factor 1/metabolism Transcription, Genetic Transfection/methods Wnt Proteins/metabolism,physiology beta Catenin/metabolism,physiology
Chemicals
T Cell Transcription Factor 1 Wnt Proteins beta Catenin
Authors & Affiliations
13 authors, click to expand affiliations / ORCID
Huang Moli
Center of Bioinformatics, National Laboratory of Genetic Engineering and Protein Engineering, College of Life Sciences, Peking University, Beijing, PR China. huangml@mail.cbi.pku.edu.cn
Wang Yihua
Sun Daochun
Zhu Hongxia
Yin Yanbing
Zhang Wei
Yang Shangbin
Quan Lanping
Bai Jinfeng
Wang Shengqi
Chen Quan
Li Songgang
Xu Ningzhi
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Article Info
Journal
BMC cancer
Abbr.
BMC Cancer
ISSN
1471-2407
Published
2006-09-07
Epub
2006-00-07
Pages
221
Language
English
Region
England
NLM ID
100967800
PMCID
PMC1574340
Subset
IM
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