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Get Free AccessNon-coding RNAs (ncRNAs) have emerged as pivotal regulators in cellular biology, dispelling their former perception as ‘junk transcripts’. Notably, the DLK1-DIO3 region harbors numerous ncRNAs, including long non-coding RNAs (lncRNAs) and over 50 microRNA genes. While papillary thyroid cancer showcases a pervasive decrease in DLK1-DIO3-derived ncRNA expression, the precise mechanisms driving this alteration remain elusive. We hypothesized that epigenetic alterations underlie shifts in ncRNA expression during thyroid cancer initiation and progression. This study aimed to elucidate the epigenetic mechanisms governing DLK1-DIO3 region expression in this malignancy. We have combined the analysis of DNA methylation by bisulfite sequencing together with that of histone modifications through ChIP-qPCR to gain insights into the epigenetic contribution to thyroid cancer in cell lines representing malignancies with different genetic backgrounds. Our findings characterize the region’s epigenetic signature in thyroid cancer, uncovering distinctive DNA methylation patterns, particularly within CpG islands on the lncRNA MEG3-DMR, which potentially account for its downregulation in tumors. Pharmacological intervention targeting DNA methylation combined with histone deacetylation restored ncRNA expression. These results contribute to the understanding of the epigenetic mechanisms controlling the DLK1-DIO3 region in thyroid cancer, highlighting the combined role of DNA methylation and histone marks in regulating the locus’ expression.
Letícia Ferreira Alves, Isabelle Nogueira da Silva, Diego Claro de Mello, César Seigi Fuziwara, Sònia Guil, Manel Esteller, Murilo Vieira Geraldo (2024). Epigenetic Regulation of DLK1-DIO3 Region in Thyroid Carcinoma. , 13(12), DOI: https://doi.org/10.3390/cells13121001.
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Type
Article
Year
2024
Authors
7
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.3390/cells13121001
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