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Published in: Journal of Cancer Research and Clinical Oncology 3/2008

01-03-2008 | Original Paper

Over-expression of FRZB in gastric cancer cell suppresses proliferation and induces differentiation

Authors: Ying Qu, Jian-fang Li, Qu Cai, Yun-wei Wang, Qin-long Gu, Zheng-gang Zhu, Bing-ya Liu

Published in: Journal of Cancer Research and Clinical Oncology | Issue 3/2008

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Abstract

Purpose

Frizzled motif associated with bone development (FRZB) was a member of secreted frizzled related proteins (sFRPs) family. Previous evidences showed that FRZB played role in embryogenesis and diseases such as osteoarthritis and prostate cancer. The purpose of our study is to clarify the role of FRZB in gastric cancer cell proliferation and differentiation.

Methods

The expression of FRZB in gastric cancer tissues were detected by immunohistochemistry. The expression of FRZB in eight gastric cancer cell lines and one immortal gastric epithelial cell GES-1 were detected by western blotting and real-time quantitative PCR. To investigate the role of over-expressed FRZB in gastric cancer cells, FRZB/pcDNA3.1 plasmid was constructed and transfected into gastric cancer cell line SGC7901. The changes of biological features in these stable transfectants were examined.

Results

FRZB was highly expressed in gastric cancer (90%), intestinal metaplasia (100%) and gastric dysplasia (90%), but no or just weakly (3/40) expressed in normal gastric mucosa. FRZB staining was stronger in intestinal-type gastric cancer tissues than that in diffuse-type ones and was positive correlated with differentiation grade. The expression of FRZB in eight gastric cancer cell lines was higher than in GES-1. Over-expressed FRZB inhibited cell proliferation in vitro and in vivo which was first caused by prolonged cell division progression in G2/M phase, and second by higher sensitivity to apoptotic inducing factors and spontaneous apoptosis. Our findings gave evidences that FRZB suppressed gastric cancer cell proliferation and modulated the balance between proliferation and differentiation in gastric cancer.
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Metadata
Title
Over-expression of FRZB in gastric cancer cell suppresses proliferation and induces differentiation
Authors
Ying Qu
Jian-fang Li
Qu Cai
Yun-wei Wang
Qin-long Gu
Zheng-gang Zhu
Bing-ya Liu
Publication date
01-03-2008
Publisher
Springer-Verlag
Published in
Journal of Cancer Research and Clinical Oncology / Issue 3/2008
Print ISSN: 0171-5216
Electronic ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-007-0291-0

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