Abstract
Neuronal growth and regeneration are regulated by local translation of mRNAs in axons. We examined RNA polyadenylation changes upon sensory neuron injury and found upregulation of a subset of polyadenylated B2-SINE repeat elements, hereby termed GI-SINEs (growth-inducing B2-SINEs). GI-SINEs are induced from ATF3 and other AP-1 promoter-associated extragenic loci in injured sensory neurons but are not upregulated in lesioned retinal ganglion neurons. Exogenous GI-SINE expression elicited axonal growth in injured sensory, retinal, and corticospinal tract neurons. GI-SINEs interact with ribosomal proteins and nucleolin, an axon-growth-regulating RNA-binding protein, to regulate translation in neuronal cytoplasm. Finally, antisense oligos against GI-SINEs perturb sensory neuron outgrowth and nucleolin-ribosome interactions. Thus, a specific subfamily of transposable elements is integral to a physiological circuit linking AP-1 transcription with localized RNA translation.
Original language | English |
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Journal | Cell |
Early online date | 16 May 2025 |
DOIs | |
State | Published Online - 16 May 2025 |
Keywords
- RNA localization
- Short Interspersed Nuclear Elements
- axon growth
- axonal transport
- local translation
- nerve injury
- neuronal length sensing
- non-coding RNA
All Science Journal Classification (ASJC) codes
- General Biochemistry,Genetics and Molecular Biology