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Axon-Seq Decodes the Motor Axon Transcriptome and Its Modulation in Response to ALS
Jik Nijssen1, Julio Aguila1, Rein Hoogstraaten2
1Department of Neuroscience, Karolinska Institutet, Stockholm 171 77, Sweden.
Stem Cell Reports
|December 13, 2018
Summary
Researchers developed Axon-seq to study spinal motor axons, revealing distinct axonal gene expression crucial for energy and ribosome production. This method identified key genes dysregulated in amyotrophic lateral sclerosis (ALS).
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Spinal motor axons are long and require local cellular control for function.
- Understanding axonal gene expression is vital for peripheral nerve biology and diseases like ALS.
Purpose of the Study:
- To develop and validate Axon-seq, a novel method for RNA sequencing (RNA-seq) of isolated axons.
- To characterize the axonal transcriptome and identify genes involved in axonal function and disease.
Main Methods:
- Axon-seq combines microfluidics, RNA sequencing, and bioinformatic quality control for isolating and analyzing axonal RNA.
- Applied to mouse and human stem cell-derived spinal motor axons.
Main Results:
- The axonal transcriptome is distinct from the soma, with fewer genes.
- Identified 3,500-5,000 transcripts in axons, primarily related to oxidative energy production and ribogenesis.
- Discovered 121 transcripts dysregulated in SOD1G93A mutant axons, including Nrp1, Dbn1, and Nek1, implicating them in ALS pathogenesis.
Conclusions:
- Axon-seq offers an improved approach for studying peripheral axon biology.
- The findings enhance understanding of axonal gene expression and identify potential therapeutic targets for motor neuron diseases like ALS.
Keywords:
RNA sequencingamyotrophic lateral sclerosismicrofluidic devicesmotor neuronsstem cellstranscription factorsMore Related Videos
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