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Erschienen in: Gastric Cancer 2/2012

01.04.2012 | Original Article

Clinical and therapeutic relevance of PIM1 kinase in gastric cancer

verfasst von: Benedict Yan, Ee Xuan Yau, Sanjay Samanta, Chee Wee Ong, Kol Jia Yong, Lai Kuan Ng, Bhaskar Bhattacharya, Kiat Hon Lim, Richie Soong, Khay Guan Yeoh, Niantao Deng, Patrick Tan, Yulin Lam, Manuel Salto-Tellez, Singapore Gastric Cancer Consortium

Erschienen in: Gastric Cancer | Ausgabe 2/2012

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Abstract

Background

Gastric cancer is a leading cause of cancer-related mortality, and chemotherapeutic options are currently limited. PIM1 kinase, an oncogene that promotes tumorigenesis in several cancer types, might represent a novel therapeutic target in gastric cancer.

Methods

We studied the expression and genomic status of PIM1 in human primary gastric normal and tumor tissue samples by immunohistochemistry and array-based comparative genomic hybridization (aCGH). To ascertain whether PIM1 expression predicted susceptibility to PIM1 kinase-specific inhibition, the cytotoxic effect of a previously reported PIM1-specific small molecular inhibitor (K00135) was investigated in two gastric cancer cell lines with high (IM95) and undetectable (NUGC-4) PIM1 expression levels.

Results

PIM1 expression was exclusively nuclear in normal gastric epithelial cells, while aberrant expression/localization (decreased nuclear and/or increased cytoplasmic expression) was observed in 75.6% (68/90) of the human gastric cancer tissue samples, with a significant inverse correlation between nuclear and cytoplasmic expression levels. Clinicopathological analyses revealed that decreased nuclear PIM1 expression correlated with poorer survival and greater depth of tumor invasion, while increased cytoplasmic PIM1 expression correlated inversely with the presence of lymphovascular invasion. High-level PIM1 amplification was identified in 10.5% of gastric cancers by aCGH. K00135 impaired the survival of IM95, while it had no significant effect on NUGC-4 survival.

Conclusion

Our findings demonstrate the clinical and therapeutic relevance of PIM1 in gastric cancers, and suggest that PIM1 represents a potential therapeutic target.
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Metadaten
Titel
Clinical and therapeutic relevance of PIM1 kinase in gastric cancer
verfasst von
Benedict Yan
Ee Xuan Yau
Sanjay Samanta
Chee Wee Ong
Kol Jia Yong
Lai Kuan Ng
Bhaskar Bhattacharya
Kiat Hon Lim
Richie Soong
Khay Guan Yeoh
Niantao Deng
Patrick Tan
Yulin Lam
Manuel Salto-Tellez
Singapore Gastric Cancer Consortium
Publikationsdatum
01.04.2012
Verlag
Springer Japan
Erschienen in
Gastric Cancer / Ausgabe 2/2012
Print ISSN: 1436-3291
Elektronische ISSN: 1436-3305
DOI
https://doi.org/10.1007/s10120-011-0097-2

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