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Reduced expression of REIC/Dkk-3 gene in non-small cell lung cancer

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Dickkopfs (Dkks) are secretory glycoproteins and are important for inducing amphibian head formation. Some Dkks have the ability to antagonize the Wnt proto-oncoprotein, which can promote cell proliferation and transformation when it is mutated or overexpressed. We recently cloned the REIC/Dkk-3 gene, one of the Dkks, and found that expression of the gene was markedly decreased in many human immortalized and tumor-derived cell lines. To further investigate the function of the REIC/Dkk-3 gene in vivo, the gene expression was quantified in 57 surgically-resected non-small cell lung cancer (NSCLC) tissues and their adjacent normal lung tissues by real-time quantitative PCR analysis based on TaqMan methodology. The REIC/Dkk-3 mRNA level was significantly lower in NSCLC tissues than in normal lung tissues. Reduced expression of REIC/Dkk-3 in NSCLC was observed in 36 (63%) of the 57 tumors. Reduced expression of REIC/Dkk-3 was frequently observed in poorly differentiated adenocarcinoma and squamous cell carcinoma. These results indicate that reduced expression of REIC/Dkk-3 may be correlated with rapid cell proliferation in human NSCLC.
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Document Type: Research Article

Affiliations: Department of Cell Biology, Institute of Molecular and Cellular Biology, Okayama University Medical School, Okayama 700-8558, Japan

Publication date: July 1, 2001

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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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