Molecular mechanisms of epigenetic alterations in gastrointestinal cancer and application to diagnosis and therapy

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Molecular mechanisms how this epigenetic alterations contribute to development of tumors remains to be determined. DNA methylation also leads to silencing of genes involved in cell signaling, which in turn leads to dysregulation of the oncogenic signaling such as Ras, WNT, and microRNA. We found that epigenetic inactivation of IGFBP7 plays a critical role in escaping senescence in CIMP positive colorectal cancers. We also found that epigenetic information can be used to detect cancer cells from colorectal mucosal solution.