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• W3100127985 abstract "Women with inherited mutations in BRCA1 gene have a high (40-70%) genetic risk of developing ovarian cancer. Epidemiological studies suggest an inverse correlation between serum vitamin D (VD) levels and the risk of ovarian cancer, but there is a lack of data from BRCA1 mutation (BRCA1mut) carriers. Therefore, we investigated VD levels and actions in cancer free women with BRCA1 mutations.Blood, ovary and fallopian tube samples were collected from healthy pre-menopausal women with BRCA1mut and without BRCA1 mutations (BRCAwt). Serum calcifediol (major circulating form of VD) concentrations were measured by electrochemiluminescence immunoassay. Immunohistochemistry was performed on paraffin-embedded ovarian and fallopian tube sections to determine vitamin D receptor (VDR) expression. Ovarian surface epithelial cells (OSEs) from BRCA1mut carriers were cultured with or without calcitriol supplementation for 72 hrs. VDR protein levels, cell proliferation and cell viability were analyzed.BRCA1mut women had lower serum calcifediol levels compared to BRCAwt women (p = 0.003). VDR protein expression was evident in ovarian and the fallopian tube epithelium of BRCAwt patients, but was reduced in BRCA1mut women. Calcitriol (biologically active VD) supplementation elevated VDR expression in cultured BRCA1mut OSEs (p = 0.005) and decreased cell proliferation rates in a dose-dependent manner without inducing apoptosis.VD biosynthesis and signaling via VDR in the ovarian and fallopian tube epithelium are impaired in BRCA1mut women. VD treatment may limit BRCA1mut epithelial cell proliferation without affecting cell viability, providing a rationale for exploring the potential for VD in ovarian cancer prevention in BRCA1mut carriers." @default.
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• W3100127985 date "2020-11-10" @default.
• W3100127985 modified "2023-09-30" @default.
• W3100127985 title "Association between vitamin D and ovarian cancer development in BRCA1 mutation carriers" @default.
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• W3100127985 doi "https://doi.org/10.18632/oncotarget.27803" @default.
• W3100127985 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7665231" @default.
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• W3100127985 hasPublicationYear "2020" @default.
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