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Genetic and epigenetic events in human hepatocarcinogenesis (Review)

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Hepatocellular carcinoma (HCC) is the most frequently occurring liver carcinoma world-wide. Clinical and molecular medical analyses have produced a considerable amount of information about liver carcinogenesis. Loss of heterozygosity (LOH) analyses have revealed several chromosomal loci harboring potential tumor suppressors. These data support the idea that deletion or inactivation of tumor suppressors including RB, p53, BRCA2, E-cadherin and other candidate genes seem to be common events in HCC development. Factors associated with cell cycle regulation via the Wnt- and MAPK/ERK signaling pathways are frequently deregulated in hepatocarcinogenesis. Aberrant activation of telomerase also occurs in precancerous as well as cancerous lesions in HCC patients. To characterize the wide variety of genetic events that occur in HCC, mRNA expression has been compared in HCC and non-cancerous liver tissues, and several differentially expressed genes have been identified. Hepatitis B and C viruses are the main risk factors for HCC, and indeed some accessory functions of viral products seem to contribute to tumor development; however, whether they have a direct carcinogenic effect has not yet been established.
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Document Type: Research Article

Affiliations: Department of Biochemistry II, National Defense Medical College, Saitama 359-8513, Japan

Publication date: June 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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