Dear Editor,
The peripheral nervous system (PNS) regenerates more easily after injury than the central nervous system (CNS) [1].Sensory neurons in the L4-L6 dorsal root ganglia (DRGs) extend axons to form the sciatic nerve along with motor axons.The DRG neuron is one of the exceptional mature neurons whose axons can regenerate after injury.Following sciatic nerve crush or transection, these sensory neurons rapidly re-extend axons into the lesion site [2].The switch of DRG neurons from a transmitter to a regenerative state following injury requires the induction of widespread changes through transcription factors, epigenetic modifiers,and microRNAs.