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http://dx.doi.org/10.4110/in.2009.9.6.236

Selenium Inhibits Metastasis of Murine Melanoma Cells through the Induction of Cell Cycle Arrest and Cell Death  

Song, Hyun-Keun (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Hur, In-Do (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Park, Hyun-Jin (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Nam, Joo-Hyung (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Park, Ga-Bin (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Kong, Kyoung-Hye (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Hwang, Young-Mi (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Kim, Yeong-Seok (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Cho, Dae-Ho (Department of LifeScience, Sookmyung Women's University)
Lee, Wang-Jae (Department of Anatomy and Cancer Immunology, Seoul National University College of Medicine)
Hur, Dae-Young (Department of Anatomy and Research Center for Tumor Immunology, Inje University College of Medicine)
Publication Information
IMMUNE NETWORK / v.9, no.6, 2009 , pp. 236-242 More about this Journal
Abstract
Background: Melanoma is the most fatal form of skin cancer due to its rapid metastasis. Recently, several studies reported that selenium can induce apoptosis in melanoma cells. However, the precise mechanism remains to be elucidated. In this study, we investigated the effect of selenium on cell proliferation in murine melanoma and on tumor growth and metastasis in C57BL/6 mice. Methods: Cell proliferation was measured by MTT assay in selenium-treated melanoma cells. Cell cycle distribution was analysized by staining DNA with propidum iodide (PI). mRNA and protein expression related to cell cycle arrest was measured by reverse transcription PCR and western blot. Tumor growth and metastasis was measured by in vivo model. Results: Selenium was suppressed the proliferation of melanoma cells in a dose dependent manner. The growth inhibition of melanoma by selenium was associated with an arrest of cell cycle distribution at G0/G1 stage. The mRNA and protein level of CDK2/CDK4 was suppressed by treatment with selenium in a time-dependent manner. In vivo, tumor growth was not suppressed by selenium; however tumor metastasis was suppressed by selenium in mouse model. Conclusion: These results suggest that selenium might be a potent agent to inhibit proliferative activity of melanoma cells.
Keywords
selenium; metastasis; tumor immunity; apoptosis;
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