Abstract
In the evolution of colon rectal cancer (CRC) the imbalance between cell proliferation and apoptosis is considered one of the prominent causes of tumor induction and/or progression. In order to establish the role of anti apoptotic proteins in colon cancer development, we studied with immunohistochemical techniques the expression of Survivin in a mouse model of colon carcinogenesis induced by 1,2-dimethyl-hydrazine treatment. In this mouse model Survivin was over-expressed during tumor development, showing a distribution mimicking that described in the correspondent human malignancies. We also correlated Survivin distribution with COX-2 and beta-Catenin expression patterns. The co-localization of COX-2/beta-Catenin/Survivin in the same epithelial cells in tumor samples lends credence to possible in vivo regulatory effects of COX-2 and beta-Catenin on the intracellular Survivin levels in mouse and human colon cancer.
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