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- W2994848839 abstract "DNA methyltransferases (DNMTs) regulate gene expression by methylating cytosine residues within CpG dinucleotides. Aberrant methylation patterns have been shown in a variety of human tumours including prostate cancer. However, the expression of DNMTs in clinical samples across the spectrum of prostate cancer progression has not been studied before. Tissue microarrays were constructed from the prostatectomy specimens of 309 patients across the spectrum of prostate cancer progression: hormone-naïve low-grade prostate cancer (n=49), hormone-naïve high-grade prostate cancer (n=151), hormonally treated high-grade prostate cancer (n=65), and castrate-resistant prostate cancer (CRPC) including neuroendocrine carcinoma (n=44). Adjacent non-neoplastic parenchyma was also available in 100 patients. In 71 patients with high-grade carcinoma and lymph node metastasis, tissue from the metastasis was also available for analysis. Immunohistochemical staining was performed with antibodies against DNMT1, DNMT2, DNMT3A, DNMT3B, and DNMT3L. Our results showed that DNMT1 and DNMT3L were upregulated early in prostate cancer progression, whereas DNMT2 was upregulated as a response to androgen ablation. DNMT1, DNMT3A, and DNMT3B were higher in the late stages of prostate cancer progression, i.e., the emergence of castrate resistance and androgen-independent growth. Lastly, DNMT1, DNMT2, and DNMT3L were upregulated in lymph node metastases compared to primary carcinomas. Our results highlight a cascade of epigenetic events in prostate cancer progression." @default.
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- W2994848839 date "2020-02-01" @default.
- W2994848839 modified "2023-10-16" @default.
- W2994848839 title "Epigenetics and prostate cancer: defining the timing of DNA methyltransferase deregulation during prostate cancer progression" @default.
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- W2994848839 doi "https://doi.org/10.1016/j.pathol.2019.10.006" @default.
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