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Inhibition of the growth and metastasis of human colon cancer by restoration of RUNX3 expression in cancer cells

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Recent studies demonstrated an epigenetic inactivation of the runt-related transcription factor 3 (RUNX3) gene in human colon cancer. However, it remains unclear whether RUNX3 is tumor suppressive in colon cancer and, if so, the underlying molecular mechanisms of this activity are still unknown. In the present study, we sought to determine the level of RUNX3 expression in human colon tumor specimens and used an animal model of colon cancer to determine the impact of RUNX3 expression on tumor growth and metastasis. First, we analyzed RUNX3 expression in 83 human colon tumor specimens using immunohistochemical, reverse transcriptase-polymerase chain reaction, and Western blot analysis. RUNX3 mRNA and protein expression levels were consistently lower in tumor tissue specimens than in matched normal colon tissue specimens. Also, restoration of RUNX3 expression in colon cancer cells using gene transfer inhibited colon tumor growth and metastasis in our animal model, which was consistent with inhibition of colon tumor growth in vitro. Collectively, our clinical and experimental data support the notion that RUNX3 is a tumor suppressor in human colon cancer.
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Document Type: Research Article

Affiliations: Department of General Surgery, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai, P.R. China

Publication date: November 1, 2008

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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