ELAVL3 regulates splicing of RNAs encoding synaptic signaling proteins in D1 and D2 striatal medium spiny neurons.
Irmady, K.; Scheckel, C.; Singer, R. A.; Carroll, T.; Darnell, R. B.
Show abstract
The neuronal RNA-binding protein (RBP) family nELAVL regulates key neuronal processes by binding directly to target RNA transcripts. In this study, we demonstrate that ELAVL3 is the predominant nELAVL paralog expressed in D1 and D2 medium spiny neurons of the striatum. To investigate its function, we developed ELAVL3 cTag-crosslinking and immunoprecipitation (CLIP) to generate RBP-RNA interaction maps from these neurons. By integrating data from ELAVL3-cTag and Elavl3 knockout mice, we identified distinct regulatory effects of ELAVL3 on alternative splicing of its target transcripts. Notably, ELAVL3 modulates splicing of transcripts encoding proteins critical for glutamate and dopamine receptor signaling. These findings underscore the role of ELAVL3 in RNA-mediated regulation of molecular pathways essential for medium spiny neuron function in the striatum.
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