Axon-dependent expression of YAP/TAZ mediates Schwann cell remyelination but not proliferation after nerve injury
- Temple University, United States
Abstract
Previously we showed that YAP/TAZ promote not only proliferation but also differentiation of immature Schwann cells (SCs), thereby forming and maintaining the myelin sheath around peripheral axons (Grove et al., 2017). Here we show that YAP/TAZ are required for mature SCs to restore peripheral myelination, but not to proliferate, after nerve injury. We find that YAP/TAZ dramatically disappear from SCs of adult mice concurrent with axon degeneration after nerve injury. They reappear in SCs only if axons regenerate. YAP/TAZ ablation does not impair SC proliferation or transdifferentiation into growth promoting repair SCs. SCs lacking YAP/TAZ, however, fail to upregulate myelin-associated genes and completely fail to remyelinate regenerated axons. We also show that both YAP and TAZ are redundantly required for optimal remyelination. These findings suggest that axons regulate transcriptional activity of YAP/TAZ in adult SCs and that YAP/TAZ are essential for functional regeneration of peripheral nerve.
Data availability
All data generated during this study are included in the manuscript.
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Funding
National Institute of Neurological Disorders and Stroke (NS105796)
- Young-Jin Son
Shriners Hospitals for Children (Research award)
- Young-Jin Son
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: All surgical procedures and animal maintenance complied with the National Institute of Health guidelines regarding the care and use of experimental animals and were approved by the Institutional Animal Care and Use Committee of Temple University, Philadelphia, PA, USA. Protocol 4920
Copyright
© 2020, Grove et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Axon-dependent expression of YAP/TAZ mediates Schwann cell remyelination but not proliferation after nerve injury
eLife 9:e50138.
https://doi.org/10.7554/eLife.50138
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