Axolotl Regenerates Brain Tissue After Injury, Rebuilding Neurons and Circuits Over Weeks
Updated
Updated · Forbes · May 16
Axolotl Regenerates Brain Tissue After Injury, Rebuilding Neurons and Circuits Over Weeks
3 articles · Updated · Forbes · May 16
Axolotls can regrow damaged forebrain tissue after injury, producing new neurons, restoring lost structures and reconnecting neural circuits until the regenerated region resembles the original.
A 2013 Neural Development study found the process starts with wound closure without dense scar tissue, letting ependymoglial cells activate, divide and migrate to the injury site.
Over weeks, those cells become the specific neuron types needed and extend axons in the right locations, suggesting the brain follows embedded spatial and molecular instructions rather than random growth.
Researchers say the salamander's lower-energy, less specialized nervous system and unusual cellular plasticity help it survive months-long repair that mammals generally cannot match.
A 2009 review argued such regeneration may be an ancient vertebrate trait largely lost in mammals, while axolotls retained it through their ecology and juvenile-like neotenic state.
If science allows us to regenerate our brains, could we risk losing our memories and identity in the process?
Since gene therapy can regrow digits in mice, are we on the verge of unlocking human limb regeneration?
Will these new therapies cure disease, or create a new social divide between the rich and the 'biologically enhanced' poor?
Axolotl Brain Regeneration 2022–2023: Cellular Mechanisms, Evolutionary Insights, and Translational Advances for Human Neurorepair
Overview
Axolotls are remarkable animals known for their ability to regenerate complex body parts, including their brain and spinal cord. Recent research from 2022 to 2023 has greatly expanded our understanding of how axolotls repair their brains after injury. Scientists have discovered that axolotls can restore various brain regions, such as the telencephalon and forebrain, and even achieve up to 80% regeneration of the telencephalon within eight weeks, with full functional recovery by twelve weeks. These findings are crucial for understanding the basic principles of regeneration and have important implications for developing new treatments in regenerative medicine.