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• W2004017206 abstract "Osteopontin (OPN) and CEACAM1 have diverse biological functions in the uterus and placenta throughout the estrous cycle and pregnancy and have been shown to interact with integrin beta3. OPN is a glycoprotein of the extracellular matrix, which has been shown to mediate cellular migration and invasion and to contribute to tumorigenesis in several types of cancers. Recently we showed the expression pattern of OPN in gestational trophoblastic tumors. CEACAM1 is an adhesion molecule of the carcinoembryonic antigen family that we have recently found to be expressed in endometrial cancer and that has been shown to be down-regulated in colorectal, prostate, and breast cancer. In this study, immunohistochemistry and immunofluorescence with specific antibodies were performed on a series of 20 normal endometrial samples, 17 endometrial hyperplasias, and 43 endometrial carcinomas (28 endometrioid, 10 serous, and 5 clear cell carcinomas) to investigate the expression pattern and cell-type specific localization of OPN and to correlate it with the expression of CEACAM1. In addition, Western blot was performed on normal human endometrium and endometrial neoplasia. Strong OPN expression with a consistent cytoplasmic localization in epithelial glandular cells was observed in the normal human endometrium in 80% of the samples of the proliferative and secretory phase (score 8-12). Similar results could be found in endometrial hyperplasias. Strong expression of OPN could be observed in 29 (67.4%) of the 43 analyzed endometrial carcinomas. Of the 43 analyzed tumors, 18 (41.8%) were in the high score (8-12) category with a strong OPN expression level; 11 of 43 (25.5%) showed a moderate score (4-7) category. In endometrioid carcinoma with increasing malignancy grade, increasing areas with low OPN expression level or complete loss of OPN expression could be observed. In contrast, serous tumors showed a strong OPN expression level. Similar results could be found in Western blot analysis. CEACAM1 showed similar results and could be found to be coexpressed with OPN in normal human endometrium and in endometrial neoplasia as we showed using immunofluorescence. In this study, the different expression patterns of OPN in endometrial tumors could additionally support the biological diversity of endometrioid and serous carcinomas together with other markers. We suggest that OPN might play a different role in the pathogenesis of endometrial cancer (possibly as a functional complex with CEACAM1) and could be relevant for invasive growth of such lesions." @default.
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• W2004017206 date "2006-04-01" @default.
• W2004017206 modified "2023-10-18" @default.
• W2004017206 title "Expression Pattern of Osteopontin in Endometrial Carcinoma: Correlation With Expression of the Adhesion Molecule CEACAM1" @default.
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• W2004017206 doi "https://doi.org/10.1097/01.pgp.0000189243.49522.ae" @default.
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