New study shows how the brain repairs itself during development
New study shows how the brain repairs itself during development
Updated at: June 22, 2026 at 03:15 AM
A groundbreaking 2026 study from Kyoto University has unveiled a fascinating paradox: the human brain intentionally damages its own DNA to grow.
As newborn neurons migrate through the crowded cerebral cortex, they encounter mechanical stress that causes double-strand breaks in their DNA.
This damage is triggered by an enzyme called Topoisomerase IIβ, which helps untangle genetic material but often gets trapped under physical pressure.
While DNA damage is typically seen as a sign of decay, this study suggests it is a normal, healthy part of development.
The brain repairs these breaks within 24 hours using a process called non-homologous end joining.
Researchers found that when these repair mechanisms fail, such as in mice lacking the enzyme Ligase 4, permanent neurological issues occur.
By exploring how the brain tolerates and heals from genomic trauma, scientists hope to gain deeper insights into neurodevelopmental disorders and the long-term resilience of the human mind.
