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• W3164191036 abstract "Enhancer RNAs (eRNA) are non-coding transcripts produced from active enhancers and have potential gene regulatory function. CCAAT enhancer-binding protein alpha (CEBPA) is a transcription factor generally involved in metabolism, cell cycle inhibition, hematopoiesis, adipogenesis, hepatogenesis, and is associated with tumorigenesis. In this study, we demonstrate that an enhancer-associated long non-coding RNA (elncRNA), transcribed from an enhancer located 9kb downstream from the transcriptional start site (TSS) of CEBPA, positively regulates the expression of CEBPA. As a result, we named this elncRNA 'CEBPA regulatory elncRNA downstream 9kb' or 'CRED9'. CRED9 expression level positively correlates with CEBPA mRNA expression across multiple cell lines as detected by RT droplet digital PCR. Knockdown of CRED9 resulted in a reduction of CEBPA mRNA expression in Hep3B cells. Additionally, CRED9 knockdown in Hep3B and HepG2 cells resulted in lower CEBPA protein expression. We also found that knockdown of CRED9 in Hep3B cells caused a 57.8% reduction in H3K27ac levels at the +9kb CEBPA enhancer. H3K27ac has previously been described as a marker of active enhancers. Taken together, the evidence presented here supports a previously proposed model whereby, in some contexts, eRNA transcripts are necessary to amplify and maintain H3K27ac levels at a given enhancer. Ultimately, this study adds to the growing body of evidence that elncRNA transcripts have important roles in enhancer function and gene regulation." @default.
• W3164191036 created "2021-06-07" @default.
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• W3164191036 date "2021-05-26" @default.
• W3164191036 modified "2023-10-14" @default.
• W3164191036 title "CRED9: a differentially expressed elncRNA regulates expression of transcription factor CEBPA" @default.
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• W3164191036 doi "https://doi.org/10.1261/rna.078752.121" @default.
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