Why Huntington’s disease may take so long to develop
Repeated bits of the disease-causing gene pile up in some brain cells
![This image shows an MRI scan of the brain of someone with Huntington's disease.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/11/110823_ts_huntingtons-disease_feat.jpg?fit=1030%2C580&ssl=1)
Huntington’s disease causes certain brain regions to die, as indicated by the darker areas in the center of this MRI image of the brain of a 21-year-old with the disease. Researchers have discovered that adding extra DNA to the gene that causes the disease leads to brain cell death.
Zephyr/Science Source