Rogue immune cells can infiltrate old brains
Killer T cells may dampen new nerve cell production in aged mice

UNWELCOME GUESTS In a brain region called the subventricular zone, stem cells (purple) create new nerve cells in mice’s brains. T cells (white), which are more common in older brains (right) than young brains (left), may interfere with this process.
Paloma Navarro
This article is only available to Science News subscribers.
Subscribers, enter your e-mail address to access our archives.
