AUTHOR=Eacker Stephen M., Dawson Ted M., Dawson Valina L. TITLE=The interplay of microRNA and neuronal activity in health and disease JOURNAL=Frontiers in Cellular Neuroscience VOLUME=Volume 7 - 2013 YEAR=2013 URL=https://www.frontiersin.org/journals/cellular-neuroscience/articles/10.3389/fncel.2013.00136 DOI=10.3389/fncel.2013.00136 ISSN=1662-5102 ABSTRACT= MicroRNA (miRNA) are small 19-23nt regulatory RNAs that function by modulating mRNA translation and/or turnover in a sequence-specific fashion. In the nervous system, miRNA regulate the production of numerous proteins involved in synaptic transmission. In turn neuronal activity can regulate the production and turnover of miRNA through a variety of mechanisms. In this way, miRNAs and neuronal activity are in a reciprocal homeostatic relationship that balances neuronal function. MiRNA function is critical in pathological states related to over-excitation such as epilepsy and stroke, suggesting miRNA’s potential as a therapeutic target. We review the current literature relating the interplay of miRNA and neuronal activity and provide future directions for defining miRNA’s role in disease.