1 Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Room 4235A, Building 46, 77 Massachusetts Avenue, Cambridge, MA, USA 02139.
2 Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Room 4235A, Building 46, 77 Massachusetts Avenue, Cambridge, MA, USA 02139; Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Room 4235A, Building 46, 77 Massachusetts Avenue, Cambridge, MA, USA 02139. Electronic address: lhtsai@mit.edu.
In this issue of Neuron, Weng et al. (2017) reveal a role for active DNA demethylation in allowing axon regeneration to occur in the mature nervous system following axonal injury.