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Breast cancer is one of the common malignant diseases among women in Japan as well as in western countries, and its incidence continues to increase. Normal mammary duct epithelial cells exhibit a well-organized apicobasal polarity, which forms the basis for their specific structure and function. Although the loss of epithelial cell polarity is one of the major changes that occur during the progression...
Mutations of p53 tumor suppressor gene occur in a subset of aggressive prostatic carcinomas and are detectable by immunohistochemistry. However, it is uncertain whether p53 overexpression really reflects p53 gene mutation or loss of p53 function. p21 WAF1 , an inhibitor of cyclin-dependent kinases, is activated by wild-type p53 protein, not by mutant type. Therefore, it is possible...
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