Abstract
All cells are exposed to chemicals that can damage their nucleic acids. Cells must protect these polymers because they code for key factors or complexes essential for life. Much of the work on nucleic acid damage has naturally focused on DNA, partly due to the connection between mutagenesis and human disease, especially cancer. Recent work has shed light on the importance of RNA damage, which triggers a host of conserved RNA quality control mechanisms. Because many RNA species are transient, and because of their ability to be retranscribed, RNA damage has largely been ignored. Yet, because of the connection between damaged RNA and DNA during transcription, and the association between essential complexes that process or decode RNAs, notably spliceosomes and ribosomes, the appropriate handling of damaged RNAs is critical for maintaining cellular homeostasis. This notion is bolstered by disease states, including neurodevelopmental and neurodegenerative diseases, that may arise upon loss or misregulation of RNA quality control mechanisms.
Published Version
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