Crosstalk between the DNA damage response pathway and microRNAs

Cecil Han1, Guohui Wan, Robert R Langley

  • 1Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.

Summary

MicroRNAs (miRNAs) regulate gene expression and are crucial for the DNA damage response. This review details how miRNA expression is controlled after DNA damage and their protective roles.

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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