1. Neuroscience
Download icon

Regeneration: Regrowing axons with alternative splicing

  1. Nicholas J Kramer  Is a corresponding author
  2. Aaron D Gitler  Is a corresponding author
  1. Stanford University School of Medicine, United States
Cite this article as: eLife 2016;5:e18707 doi: 10.7554/eLife.18707
1 figure


A regulatory pathway governing axon extension during neural regeneration.

Cutting axons with a laser allows the regeneration process to be studied. Chen et al. report that an RNA binding protein (called UNC-75 in worms and CELF2 in mice) promotes axon regeneration by controlling the alternative splicing of an mRNA that encodes a protein called Syntaxin. This process takes place in the nucleus of the nerve cell and essentially ‘tips the balance’ of alternative splicing towards an isoform of Syntaxin that is found predominantly in neurons (shown in dark blue and labeled “A”), and away from an isoform that is usually found in non-neuronal tissues (light blue; “B”). In fact, UNC-75 tips the balance so strongly that the Syntaxin isoform B was not found in neuronal tissues unless the gene for UNC-75 was mutated. It is not clear how the Syntaxin isoforms contribute to regeneration. It has been proposed that the Syntaxin proteins promote extra membrane to be added to the axon, possibly aiding in extending the axon after an injury (indicated by a “?”). It is also possible that different Syntaxin isoforms segregate into distinct regions of the axon membrane leading to the different functions of these isoforms.

Download links

A two-part list of links to download the article, or parts of the article, in various formats.

Downloads (link to download the article as PDF)

Download citations (links to download the citations from this article in formats compatible with various reference manager tools)

Open citations (links to open the citations from this article in various online reference manager services)