Abstract
MicroRNA (miRNA or miR) is a small noncoding RNA molecule ~22 nucleotides in size, which is found in plants, animals, and some viruses. miRNAs are thought to primarily down regulate gene expression by binding to 3′ untranslated regions of target transcripts, thereby triggering mRNA cleavage or repression of translation. Recently, evidence has emerged that miRNAs can interact with the promoter and activate gene expression. This mechanism, called RNA activation (RNAa), is a process of transcriptional activation where the direct interaction of miRNA on the promoter triggers the recruitment of transcription factors and RNA-Polymerase-II on the promoter to activate gene transcription. To date, very little is known about the mechanism by which miRNA regulates RNA activation (RNAa) and their role in tumor progression. This is an emerging field in RNA biology. In this chapter, we describe the mechanisms utilized by miRNAs to activate transcription.
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Acknowledgments
P. Chaluvally-Raghavan is supported by the Liz-Tilberis Career Development Award and the Ann Schreiber Scholar Award from the Ovarian Cancer Research Foundation and funds from the Marsha Rivkin Center for Ovarian Cancer Research. Ramani Ramchandran is supported by endowment funds from the Department of OBGYN at MCW, programmatic support funds from the Department of Pediatrics, Children’s Research Institute, and NIH grants HL123338, HL112639, HL033833, and HL128374.
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The authors declare that there is no conflict of interest regarding the publication of this paper.
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Ramchandran, R., Chaluvally-Raghavan, P. (2017). miRNA-Mediated RNA Activation in Mammalian Cells. In: Li, LC. (eds) RNA Activation. Advances in Experimental Medicine and Biology, vol 983. Springer, Singapore. https://doi.org/10.1007/978-981-10-4310-9_6
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DOI: https://doi.org/10.1007/978-981-10-4310-9_6
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