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Updated: Sep 19, 2025
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Use of Alu Element Containing Minigenes to Analyze Circular RNAs
Published on: March 10, 2020
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ELAV mediates circular RNA biogenesis in neurons
Carlos Alfonso-Gonzalez1,2, Mengjin Shi3,2, Sakshi Gorey3,2
1Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; hilgers@ie-freiburg.mpg.de carlos.alfonso@embl.de.
Genes & Development
|June 9, 2025
Summary
The RNA-binding protein ELAV directly controls the creation of circular RNAs (circRNAs) in neurons. ELAV protein is essential for neuronal circRNA production, influencing gene expression and synaptic function.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Circular RNAs (circRNAs) are prevalent in animal nervous systems.
- circRNAs are implicated in regulating gene expression and synaptic function.
Purpose of the Study:
- To investigate the role of the ELAV protein in neuronal circRNA biosynthesis.
- To characterize the circRNA landscape in Drosophila neurons with and without functional ELAV.
Main Methods:
- Comparative analysis of circRNA profiles in normal and ELAV-deficient Drosophila neurons.
- Investigating ELAV's interaction with pre-mRNA introns and its effect on splicing.
- Assessing the impact of ELAV expression on ectopic RNA circularization.
Main Results:
- Neuronal circRNAs were globally depleted (>75%) in ELAV knockout mutants.
- ELAV expression induced ectopic circRNA formation.
- ELAV binds to introns flanking circRNAs, promoting circularization over linear splicing.
Conclusions:
- The pan-neuronal RNA-binding protein ELAV is a key mediator of neuronal circRNA biosynthesis.
- ELAV directly influences alternative splicing to generate the neuronal circRNA landscape.
- Findings provide mechanistic insight into circRNA generation in the nervous system.
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