When you lose something, an easy solution can be to just replace it. But what if the something you’ve lost are cells in the brain? Can they simply be replaced? Some researchers have been working toward this for Huntington’s disease (HD) by injecting new cells into the brains of animal models. A recent publication that has garnered a lot of press looked at the effects of replacing cells in the brains of mice that model HD - with surprising findings. The work draws attention to a less well-known type of cell and could inform future studies.
The brain’s supporting cast
Neurons are one of many types of cells in the brain. They get a lot of attention in Huntington’s disease (HD), and rightfully so! Neurons are the cell type most affected by HD. They’re the ones that are shaped like a tree, with branches coming out the top, a long trunk, and roots at the bottom. This cell type transmits signals to help us think, feel, and move. We see neurons die over time in HD. But they’re not the only type of cell in the brain affected by HD.