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자료유형
학술저널
저자정보
저널정보
한국실험동물학회 Laboratory Animal Research Laboratory Animal Research Vol.25 No.1
발행연도
2009.3
수록면
41 - 46 (6page)

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The oncogene c-Fos involved in cell cycle progression is rapidly and transiently induced by a variety of agents and functions as a transcriptional regulator for several genes such as activator protein-1 (AP-1). In various cancers including squamous cell carcinoma, hepatocellular carcinoma and osteosarcoma, c-Fos expression may be relevant to the carcinogenic events. In the present study, the expression patterns and the potential importance of c-Fos in cholangiocarcinogenesis were evaluated by immunohistochemical staining for c-Fos in the selected each five cases of precancerous lesion (interim stage of cholangiocarcinogenesis, 8 weeks after liver fluke infection) and cholangiocarcinoma (ChC) derived from the hamster ChC model. Additionally, c-Fos immunoreactivity of 5 cases of carcinogen-unaffected hyperplastic bile ducts obtained from 12-day bile duct ligation model was also evaluated. Nuclear expression of c-Fos was apparent in most of the cell components of dysplastic bile ducts and cholangiocarcinoma. However, normal and well-organized hyperplastic bile ducts (type 1 hyperplastic bile ducts) were almost negative. These expression patterns were positively correlated with those of proliferating cell nuclear antigen (PCNA), suggesting that c-Fos overexpression might be associated with the high cellular proliferating activity and cell transformation in the hamster cholangiocarcinogenesis.

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Materials and Methods
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