EBM Email Content Delivery
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

First published online October 10, 2008
Experimental Biology and Medicine 233:1537-1545 (2008)
doi: 10.3181/0805-RM-164
© 2008 by the Society for Experimental Biology and Medicine
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
233/12/1537    most recent
0805-RM-164v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Song, G.
Right arrow Articles by Ouyang, G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Song, G.
Right arrow Articles by Ouyang, G.

ORIGINAL RESEARCH ARTICLE

Osteopontin Prevents Curcumin-Induced Apoptosis and Promotes Survival Through Akt Activation via {alpha}vβ3 Integrins in Human Gastric Cancer Cells

Gang Song*,{dagger},1, Yanlin Ming*,1, Yubin Mao*,{dagger}, Shideng Bao* and Gaoliang Ouyang*,2

* Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen 361005, China; and {dagger} Cancer Research Center, Medical College, Xiamen University, Xiamen 361005, China

To whom requests for reprints should be addressed at 2 Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen 361005, China. E-mail: oygldz{at}yahoo.com.cn

Osteopontin (OPN) is a secreted, integrin-binding matrix phosphorylated glycoprotein that is overexpressed in many advanced cancers. However, the functional mechanisms by which OPN contributes to gastric cancer development are poorly understood. Here, we report that curcumin inhibited the growth of SGC7901 cell and induced apoptosis in a concentration- and time-dependent manner, while the acquired expression of OPN in SGC7901 cells dramatically promoted cell survival under serum depletion and prevented curcumin-induced apoptosis. Furthermore, PI3-K inhibitor LY294002 attenuated OPN-mediated Akt activation. Moreover, inhibiting the binding of OPN to {alpha}vβ3 integrins reduced activation of Akt. Taken together, these results demonstrate that the pro-survival and anti-apoptosis activities of OPN in gastric cancer cells are mediated in part through PI3-K/Akt pathway via {alpha}vβ3 integrins.

Key Words: osteopontin (OPN) • gastric cancer • curcumin • apoptosis • Akt






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2008 by the Society for Experimental Biology and Medicine.