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Published in: International Journal of Clinical Oncology 2/2011

01-04-2011 | Original Article

Expression of thrombospondin-1 and Ski are prognostic factors in advanced gastric cancer

Authors: Toshihiro Nakao, Nobuhiro Kurita, Masato Komatsu, Kozo Yoshikawa, Takashi Iwata, Toru Utsunomiya, Mitsuo Shimada

Published in: International Journal of Clinical Oncology | Issue 2/2011

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Abstract

Background

It has been suggested that thrombospondin-1 (TSP-1) plays a role in angiogenesis in many cancers. In addition, TSP-1 has been shown to suppress tumor growth by activating transforming growth factor-β (TGF-β). Recent studies have shown that Ski protein suppresses TGF-β signaling. The aim of this study was to investigate the role of TSP-1 and Ski expression in advanced gastric cancer.

Methods

Sixty-five recurrent patients who underwent resection of advanced gastric cancer (n = 62) or who had unresectable tumors (n = 3) between March 2003 and October 2007 participated in this study. All patients were treated with chemotherapy after collection of the tumor tissue. Twenty-three of them were also treated with chemotherapy before collection of the tumor specimen. The TSP-1, Ski, vascular endothelial growth factor (VEGF) and TGF-β protein expression were examined by immunohistochemical staining, and microvessels in the tumor were counted.

Results

There were 17 (26.2%) gastric cancers with positive staining for TSP-1. There was no relationship between TSP-1 expression and clinicopathological factors.

TSP-1 expression had positive association with VEGF expression, microvessel density (MVD) and TGF-β expression. However, there was no relationship between TSP-1 and Ski expression. TSP-1 correlated with good survival in advanced gastric cancer, and Ski correlated with poor survival in the patients with TGF-β-positive advanced gastric cancer.

Conclusions

This study shows that TSP-1 enhances angiogenesis due to its positive correlation with VEGF and MVD, and is a good prognostic factor for survival in advanced gastric cancer. This study also shows that Ski inhibits the prolonged effects of TGF-β for survival in advanced gastric cancer.

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Metadata
Title
Expression of thrombospondin-1 and Ski are prognostic factors in advanced gastric cancer
Authors
Toshihiro Nakao
Nobuhiro Kurita
Masato Komatsu
Kozo Yoshikawa
Takashi Iwata
Toru Utsunomiya
Mitsuo Shimada
Publication date
01-04-2011
Publisher
Springer Japan
Published in
International Journal of Clinical Oncology / Issue 2/2011
Print ISSN: 1341-9625
Electronic ISSN: 1437-7772
DOI
https://doi.org/10.1007/s10147-010-0147-5

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