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- W4367672459 abstract "Long interspersed nuclear element-1 (LINE-1, L1) affects the transcriptome landscape in multiple ways. Promoter activity within its 5’UTR plays a critical role in regulating diverse L1 activities. However, the epigenetic status of L1 promoters in adult brain cells and their relationship with psychiatric disorders remain poorly understood. Here, we examined DNA methylation and hydroxymethylation of the full-length L1s in neurons and nonneurons and identified “epigenetically active” L1s. Notably, some of epigenetically active L1s were retrotransposition competent, which even had chimeric transcripts from the antisense promoters at their 5’UTRs. We also identified differentially methylated L1s in the prefrontal cortices of patients with psychiatric disorders. In nonneurons of bipolar disorder patients, one L1 was significantly hypomethylated and showed an inverse correlation with the expression level of the overlapping gene NREP. Finally, we observed that altered DNA methylation levels of L1 in patients with psychiatric disorders were not affected by the surrounding genomic regions but originated from the L1 sequences. These results suggested that altered epigenetic regulation of the L1 5’UTR in the brain was involved in the pathophysiology of psychiatric disorders." @default.
- W4367672459 created "2023-05-03" @default.
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- W4367672459 creator A5085717963 @default.
- W4367672459 date "2023-05-01" @default.
- W4367672459 modified "2023-10-02" @default.
- W4367672459 title "Identification of epigenetically active L1 promoters in the human brain and their relationship with psychiatric disorders" @default.
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