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Erschienen in: Journal of Cancer Research and Clinical Oncology 7/2015

01.07.2015 | Original Article – Cancer Research

Anti-LeY antibody enhances therapeutic efficacy of celecoxib against gastric cancer by downregulation of MAPKs/COX-2 signaling pathway: correlation with clinical study

verfasst von: Faisal Aziz, Xuesong Yang, Xiaoqi Wang, Qiu Yan

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 7/2015

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Abstract

Introduction

Helicobacter pylori (H. pylori) is a major causative agent for the induction of chronic gastritis, gastric ulcer and gastric cancer. Celecoxib (COX-2 inhibitor) inhibits gastric cancer cell proliferation, but with low treatment efficacy, limiting its applications. It is important to develop a better strategy to improve the efficacy of celecoxib. Lewis Y (LeY) is a difucosylated oligosaccharide, highly expressed in 60–90 % of human epithelial cancers, including gastric cancer. We previously found that H. pylori infection was associated with high level of LeY in gastric cancer.

Material and Methods

Herein, we analyzed the correlation between H. pylori and cyclo-oxygenase-2 (COX-2), LeY, gastric markers (CA724 and GRN) in gastric patient’s tissue and serum samples by IHC and ELISA. Furthermore, we treated the primary gastric cancer cells with celecoxib, anti-LeY antibody or the combination, and analyzed their therapeutic efficacy on CA724, GRN and COX-2 expression by Western blot, flow cytometry and ELISA.

Results

We found that gastric cancer had significantly high expression of H. pylori, COX-2, CA724, and GRN compared to gastric ulcers and chronic gastritis (P < 0.0001). H. pylori level showed significant correlation with COX-2 (R—0.552), LeY (R—0.861), CA724 (R—0.714) and GRN (R—0.664) (P < 0.0001). Additionally, the combination therapy led to impressive inhibition of gastric cancer cell proliferation, with decreased expression of COX-2, CA724 and GRN through downregulation of MAPKs/COX-2 pathway (P < 0.01).

Conclusions

Our findings suggest that anti-LeY antibody enhances the cancer cell proliferation inhibitory effects of celecoxib, which might be a new feasible way for gastric cancer therapy.
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Metadaten
Titel
Anti-LeY antibody enhances therapeutic efficacy of celecoxib against gastric cancer by downregulation of MAPKs/COX-2 signaling pathway: correlation with clinical study
verfasst von
Faisal Aziz
Xuesong Yang
Xiaoqi Wang
Qiu Yan
Publikationsdatum
01.07.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 7/2015
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-014-1892-z

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