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Updated: Feb 26, 2026
07:06
Isolation and Quantification of Axonal mRNAs Using Porous Membrane Inserts and RTddPCR
Published on: February 6, 2026
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Neuronal TDP-43 regulates myelin formation via neurexin 1 mRNA stabilization
Jiayi Li1, Yohei Iguchi1, Kenji Yoshida2
1Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Aichi 4668550, Japan.
Summary
Neuronal TDP-43 loss causes hypomyelination and memory deficits in mice. Restoring TDP-43 or Neurexin-1 (NRXN1) in neurons rescues these deficits, revealing TDP-43
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration (FTLD) are linked to TAR DNA-binding protein 43 (TDP-43) pathology.
- Neuronal and glial cell interactions are crucial in these neurodegenerative diseases.
Purpose of the Study:
- To investigate the role of neuronal TDP-43 in neuron-oligodendrocyte interactions.
- To elucidate the molecular mechanisms underlying TDP-43-mediated myelin formation and neuronal function.
Main Methods:
- Utilized neuron-specific TDP-43 knockout (TDP-43cKO) mice.
- Performed immunohistochemistry, ultrastructural analysis, and electrophysiological recordings.
- Conducted neuron-specific transcriptome analysis and mRNA stabilization assays.
Main Results:
- TDP-43 depletion in neurons led to hypomyelination and impaired nerve conduction.
- Neurexin-1 (NRXN1) was identified as a direct transcriptional target of TDP-43, promoting myelin formation.
- Supplementation of TDP-43 or NRXN1 in neurons restored myelin and cognitive function.
Conclusions:
- Neuronal TDP-43 is essential for maintaining myelin integrity through NRXN1 mRNA stabilization.
- Dysregulation of this pathway contributes to the pathophysiology of ALS and FTLD.
- Targeting the TDP-43-NRXN1 axis may offer therapeutic strategies for neurodegenerative diseases.
Keywords:
TAR DNA-binding protein 43amyotrophic lateral sclerosisfrontotemporal lobar degenerationneurexin 1neurodegenerationMore Related Videos
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