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Erschienen in: Journal of Gastrointestinal Surgery 5/2012

01.05.2012 | Original Article

CIP2A Is a Predictor of Poor Prognosis in Colon Cancer

verfasst von: Hao-Wei Teng, Shung-Haur Yang, Jen-Kou Lin, Wei-Shone Chen, Tzu-Chen Lin, Jeng-Kai Jiang, Chueh-Chuan Yen, Anna Fen-Yau Li, Paul Chih-Hsueh Chen, Yuan-Tzu Lan, Chun-Chi Lin, Yen-Ning Hsu, Hsei-Wei Wang, Kuen-Feng Chen

Erschienen in: Journal of Gastrointestinal Surgery | Ausgabe 5/2012

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Abstract

Purpose

The cancerous inhibitor of protein phosphatase 2A (CIP2A) oncoprotein is overexpressed in colon cancer tissue compared to normal colon mucosa. We investigated the impact of CIP2A on colon cancer.

Methods

A tissue microarray consisting of 167 colon cancer specimens was investigated. The association between CIP2A and clinicopathological parameters was analyzed using the χ 2 test. Survival was analyzed using the Kaplan–Meier method. The impact of CIP2A on proliferation and drug resistance was evaluated using the 3-(4, 5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide test. An anchorage-independent colony formation assay was also performed.

Results

CIP2A was an independent prognostic factor in colon cancer after controlling for other clinical confounding factors, such as stage and lymphovascular invasion, particularly in stages III and IV (hazard ratio = 2.974, P < 0.001). The knockdown of CIP2A reduced the proliferation and anchorage-independent colony formation of colon cancer cells. Knockdown of CIP2A decreased the resistance of the cells to 5-fluorouracil, oxaliplatin, and SN38 (an active metabolite of irinotecan). Treatment with 5-fluorouracil, oxaliplatin, and SN38 decreased CIP2A expression.

Conclusions

CIP2A is a prognostic factor in colon cancer. The knockdown of CIP2A reduced proliferation and anchorage-independent colony formation and increased 5-fluorouracil, oxaliplatin, and SN38 efficacy in colon cancer cell lines.
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Metadaten
Titel
CIP2A Is a Predictor of Poor Prognosis in Colon Cancer
verfasst von
Hao-Wei Teng
Shung-Haur Yang
Jen-Kou Lin
Wei-Shone Chen
Tzu-Chen Lin
Jeng-Kai Jiang
Chueh-Chuan Yen
Anna Fen-Yau Li
Paul Chih-Hsueh Chen
Yuan-Tzu Lan
Chun-Chi Lin
Yen-Ning Hsu
Hsei-Wei Wang
Kuen-Feng Chen
Publikationsdatum
01.05.2012
Verlag
Springer-Verlag
Erschienen in
Journal of Gastrointestinal Surgery / Ausgabe 5/2012
Print ISSN: 1091-255X
Elektronische ISSN: 1873-4626
DOI
https://doi.org/10.1007/s11605-012-1828-3

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