Korean J Med.
2010 Aug;79(2):113-118.
Understanding of molecular pathogenesis and genetic markers in colorectal cancer
- Affiliations
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- 1Department of Gastroenterology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Abstract
- Colorectal cancers results from the progressive accumulation of genetic and epigenetic alterations that lead to cellular transformation and tumor progression. Genomic instability, including chromosomal translocations and microsatellite instability, plays a role in acquisition of enough mutations for malignant transformation. In addition, epigenetic silencing is an important mechanism in the evolution of a subgroup of colorectal cancers. These genetic and epigenetic changes causes activation of oncogene pathway (APC, KRAS) and inactivation of tumor-suppressor pathway (p53, TGF-beta). Recent advance in colorectal carcinogenensis leads to development of molecular markers for early detection and predictive and prognostic markers.