Study finds blocking T cells entry into brain slows neurodegeneration in mice

Researchers at Washington University in St. Louis reported that preventing certain immune cells, specifically T cells, from entering the brain reduced signs of neurodegeneration in a mouse model.

The team used genetic and pharmacologic methods to limit T‑cell infiltration and observed slower loss of neurons compared with untreated mice.

These findings suggest that T‑cell activity in the brain may play a role in neurodegenerative processes and could represent a new therapeutic avenue, although further studies in humans are needed.

The study adds to growing evidence that the immune system interacts with brain health, highlighting potential targets for future drug development.