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• W2144630076 abstract "Endometrioid carcinoma represents approximately 10% of cases of the malignant ovarian epithelial tumors. According to literature, the vitamin A (carotenoids and retinoids) plays an essential role in cell proliferation, differentiation and apoptosis in both normal and neoplastic ovarian tissues. Apart from that, the retinoids alter a cytotoxic effect of chemiotherapeutics, i.e. docetaxel, on ovarian cancer cell lines. Retinoids act on cancer cells throughout different mechanism than taxanes, so they may be the potential candidates for the new treatment strategies of ovarian cancer. The aim of the study was to determine the effects of vitamin A family compounds (retinol, beta-carotene, lycopene, all-trans -, 9-cis - and 13-cis retinoic acid) on the growth and proliferation of CRL-11731 endometrioid ovary cancer cell line and on docetaxel and estradiol activity in this culture. The assay was based on [3H] thymidine incorporation and the proliferative activity of PCNA- and Ki 67-positive cells. The apoptotic index and expression of the Bcl-2 and p53 antigens in CRL-11731 cells were also studied. Among vitamin A family compounds retinol and carotenoids, but not retinoids, inhibited the growth of cancer cells in dose dependent manner. Only the concentration of 100 muM of docetaxel inhibited incorporation [3H] thymidine into CRL-11731 cancer cells. Retinol (33.4%+/-8.5), carotenoids (beta-carotene 20 muM 4.7%+/-2.9, 50 muM 2.2%+/-0.9; lycopene 10 muM 7.6%+/-0.8, 20 muM 5.2%+/-2.5, 50 muM 2.9%+/-1.2), and 13-cis retinoic acid (19.7%+/-2.2) combined with docetaxel (100 muM) significantly decreased the percentage of proliferating cells (p<0.0001). The antiproliferative action of lycopene alone and in combination with docetaxel was also confirmed in immunohistochemical examination (decreased the percentage of PCNA and Ki67 positive cells). Also retinol (10 muM) and lycopene (20 and 50 muM) combined with estradiol (0.01 muM) statistically decreased the percentage of proliferating cells compared to the control (p<0.0001) and estradiol (p<0.01, p<0.0001) group (63.5%+/-14.8, 61.0%+/-20.6, 15.0%+/-5.5 respectively). In our experiments, the compounds tested induced an apoptotic effect. Docetaxel and estradiol increased the percentage of apoptotic cells (71% apoptotic cells after administration of 10 muM all-trans retinoic acid combined with 0.01 muM estradiol, p<0.0001). beta-carotene, lycopene and all-trans retinoic acid alone and in combination with docetaxel were found to influence the expression of bcl-2 and p53 antigen in the cells examined. The results of our study justified an important role of vitamin A in the pathophysiology of the ovarian endometrioid cancer." @default.
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• W2144630076 date "2010-01-14" @default.
• W2144630076 modified "2023-10-11" @default.
• W2144630076 title "Vitamin A family compounds, estradiol, and docetaxel in proliferation, apoptosis and immunocytochemical profile of human ovary endometrioid cancer cell line CRL-11731." @default.
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• W2144630076 doi "https://doi.org/10.2478/v10042-009-0052-9" @default.
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