Rat cells grew in mice brains, and helped sniff out cookies
Chimeric mice are helping to reveal the biology of flexible brain development
![A photograph of two mice looking in the direction of the camera, one brown mouse on the left and one brown and white mouse on the right.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2024/04/042424_ls_rat-mouse-brains_feat.jpg?fit=1030%2C580&ssl=1)
A mouse (right) was genetically tweaked to have no forebrain, usually a lethal condition. But rat cells helped populate its brain, a new study shows. Rat cells were less likely to integrate into the mouse on the left, which didn’t have the genetic tweak.
J. Huang et al/Cell 2024