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BMC Cancer
Published in: BMC Cancer 1/2015

Open Access 01-12-2015 | Research article

FGF9 from cancer-associated fibroblasts is a possible mediator of invasion and anti-apoptosis of gastric cancer cells

Authors: Chao Sun, Hirokazu Fukui, Ken Hara, Xinxing Zhang, Yoshitaka Kitayama, Hirotsugu Eda, Toshihiko Tomita, Tadayuki Oshima, Shojiro Kikuchi, Jiro Watari, Mitsuru Sasako, Hiroto Miwa

Published in: BMC Cancer | Issue 1/2015

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Abstract

Background

Cancer-associated fibroblasts (CAFs), which reside around tumor cells, are suggested to play a pivotal role in tumor progression. Here we performed microarray analyses to compare gene expression profiles between CAFs and non-cancerous gastric fibroblasts (NGFs) from a patient with gastric cancer and found that fibroblast growth factor 9 (FGF9) was a novel growth factor overexpressed in CAFs. We then examined the biological effects of FGF9 during progression of gastric cancer.

Methods

Expression of FGF9 in CAFs and NGFs, and their secreted products, were examined by Western blotting. The effects of FGF9 on AGS and MKN28 gastric cancer cells in terms of proliferation, invasion and anti-apoptosis were assessed by WST-1 assay, invasion chamber assay and FACS, respectively. Furthermore, the intracellular signaling by which FGF9 exerts its biological roles was examined in vitro.

Results

FGF9 was strongly expressed in CAFs in comparison with NGFs, being compatible with microarray data indicating that FGF9 was a novel growth factor overexpressed in CAFs. Treatment with FGF9 promoted invasion and anti-apoptosis through activation of the ERK and Akt signaling pathways in AGS and MKN28 cells, whereas these effects were attenuated by treatment with anti-FGF9 neutralizing antibody. In addition, FGF9 treatment significantly enhanced the expression of matrix metalloproteinase 7 (MMP7) in both cell lines.

Conclusions

FGF9 is a possible mediator secreted by CAFs that promotes the anti-apoptosis and invasive capability of gastric cancer cells.
Appendix
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Metadata
Title
FGF9 from cancer-associated fibroblasts is a possible mediator of invasion and anti-apoptosis of gastric cancer cells
Authors
Chao Sun
Hirokazu Fukui
Ken Hara
Xinxing Zhang
Yoshitaka Kitayama
Hirotsugu Eda
Toshihiko Tomita
Tadayuki Oshima
Shojiro Kikuchi
Jiro Watari
Mitsuru Sasako
Hiroto Miwa
Publication date
01-12-2015
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2015
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-015-1353-3

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