PDK1 is a negative regulator of axon regeneration

Hyemin Kim, Jinyoung Lee, Yongcheol Cho

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Axon regeneration in the central nervous system is inefficient. However, the neurons in the peripheral nervous system display robust regeneration after injury, indicating that axonal regeneration is differentially controlled under various conditions. To identify those molecules regulating axon regeneration, comparative analysis from dorsal root ganglion neurons at embryonic or adult stages is utilized, which reveals that PDK1 is functions as a negative regulator of axon regeneration. PDK1 is downregulated in embryonic neurons after axotomy. In contrast, sciatic nerve axotomy upregulated PDK1 at protein levels from adult mice. The knockdown of PDK1 or the chemical inhibition of PDK1 promotes axon regeneration in vitro and in vivo. Here we present PDK1 as a new player to negatively regulate axon regeneration and as a potential target in the development of therapeutic applications.

Original languageEnglish
Article number31
JournalMolecular brain
Issue number1
Publication statusPublished - 2021 Dec

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF). Grant funded by the Korean government (MSIT) 2019R1A2C1005380 to Y.C.

Publisher Copyright:
© 2021, The Author(s).


  • Axon regeneration
  • CNS
  • DLK
  • Kinase
  • PDK1
  • PDPK1
  • PNS

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience


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