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- W2014049097 abstract "DOC-2/hDab2 (DOC-2) has tumor suppressive functions in ovarian cancer and choriocarcinoma. In these tumors, it negatively influences mitogenic signal transduction of growth factors and blocks ras activity. Pancreatic cancer exhibits a high frequency of K-ras gene mutations; however, it is not known whether DOC-2 expression is altered in these tumors. Therefore, we investigated DOC-2 expression in 22 pancreatic adenocarcinomas and in 6 pancreatic cancer cell lines. Findings in human tumors were compared with normal controls and correlated with clinicopathological data. Additionally, the influence of K-ras on DOC-2 transcription was investigated. Northern blot and Western blot analyses both demonstrated an increase of DOC-2 mRNA and protein levels in primary pancreatic cancers in comparison with normal controls. In situ hybridization showed DOC-2 mRNA expression in the majority of cancer cells of primary tumors, as well as in chronic pancreatitis-like lesions surrounding the cancer mass. Immunohistochemistry mirrored the in situ hybridization findings. In contrast, levels of expression of DOC-2 in lymph node metastases were markedly decreased in comparison with levels in primary tumors. In addition, in 5 metastatic pancreatic cancer cell lines, DOC-2 mRNA and protein levels were low, whereas quantitative RT-PCR demonstrated relatively higher levels in a nonmetastatic pancreatic cancer cell line. In conclusion, DOC-2 is overexpressed in primary pancreatic adenocarcinoma but down-regulated in metastatic disease, suggesting a tumor suppressor function of DOC-2 in the late steps of pancreatic carcinogenesis." @default.
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- W2014049097 date "2001-06-01" @default.
- W2014049097 modified "2023-10-18" @default.
- W2014049097 title "DOC-2/hDab2 Expression Is Up-Regulated in Primary Pancreatic Cancer but Reduced in Metastasis" @default.
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- W2014049097 doi "https://doi.org/10.1038/labinvest.3780295" @default.
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