Abstract
Neurons are vulnerable to injury, and failure to activate self-protective systems after injury leads to neuronal death. However, sensory neurons in dorsal root ganglions (DRGs) mostly survive and regenerate their axons. To understand the mechanisms of the neuronal injury response, we analyzed the injury-responsive transcriptome and found that Stc2 is immediately upregulated after axotomy. Stc2 is required for axon regeneration in vivo and in vitro, indicating that Stc2 is a neuronal factor regulating axonal injury response. The application of the secreted stanniocalcin 2 to injured DRG neurons promotes regeneration. Stc2 thus represents a potential secretory protein with a feedback function regulating regeneration. Finally, the in vivo gene delivery of STC2 increases regenerative growth after injury in peripheral nerves in mice. These results suggest that Stc2 is an injury-responsive gene required for axon regeneration and a potential target for developing therapeutic applications.
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Abbreviations
- AU:
-
arbitrary unit
- Ax:
-
axotomy
- AAV:
-
adeno-associated virus
- CM:
-
conditioned medium
- DRB:
-
5,6-dichlorobenzimidazole 1-β-D-ribofuranoside
- DRG:
-
dorsal root ganglion
- HDAC5:
-
histone deacetylase 5
- HDAC5nuc:
-
histone deacetylase 5, nuclear retention mutant form
- HIF-1:
-
hypoxia-inducible factor 1
- Iono:
-
ionomycin
- KD:
-
knockdown
- KO:
-
knockout
- NS:
-
not significant
- PNS:
-
peripheral nervous system
- ShRNA:
-
short hairpin RNA
- SOCE:
-
store-operated calcium entry
- Wk:
-
week
- WT:
-
wild type
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Funding
This work was supported by the Health Technology R&D Project (HI17C1459) through the Korea Health Industry Development Institute (KHIDI), funded by the Korean Ministry of Health & Welfare and supported by a Korea University Grant to Y.C., by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIT) 2016R1A5A2007009 to J.E.S.
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J.E.S., V.C., and Y.C. designed the research; J.E.S., Y.J., M.K., E.C., and Y.C. conducted the research; and J.E.S., V.C., and Y.C. wrote the manuscript.
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Jeon, Y., Shin, J.E., Kwon, M. et al. In Vivo Gene Delivery of STC2 Promotes Axon Regeneration in Sciatic Nerves. Mol Neurobiol 58, 750–760 (2021). https://doi.org/10.1007/s12035-020-02155-2
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DOI: https://doi.org/10.1007/s12035-020-02155-2