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Updated: Sep 1, 2025
Genetic Study of Axon Regeneration with Cultured Adult Dorsal Root Ganglion Neurons
Published on: August 17, 2012
Genetic control of neuronal activity enhances axonal growth only on permissive substrates
Francina Mesquida-Veny1,2,3,4, Sara Martínez-Torres1,2,3,4, José Antonio Del Río1,2,3,4
1Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia (IBEC), Barcelona, Spain.
Background:
Neural tissue has limited regenerative ability. To cope with that, in recent years a diverse set of novel tools has been used to tailor neurostimulation therapies and promote functional regeneration after axonal injuries.
Method:
In this report, we explore cell-specific methods to modulate neuronal activity, including opto- and chemogenetics to assess the effect of specific neuronal stimulation in the promotion of axonal regeneration after injury.
Results:
Opto- and chemogenetic stimulations of neuronal activity elicited increased in vitro neurite outgrowth in both sensory and cortical neurons, as well as in vivo regeneration in the sciatic nerve, but not after spinal cord injury. Mechanistically, inhibitory substrates such as chondroitin sulfate proteoglycans block the activity induced increase in axonal growth.
Conclusions:
We found that genetic modulations of neuronal activity on both dorsal root ganglia and corticospinal motor neurons increase their axonal growth capacity but only on permissive environments.
