Scientists looked at twelve different studies involving mice with Alzheimer's disease. These animals had specific genes changed to mimic human brain problems. The researchers tested what happened when they made a protein called TREM2 work better in these mice.
When TREM2 activity went up, the number of sticky protein clumps in the brain went down significantly. These clumps are known to cause memory loss and confusion. The studies found that both the amount and size of these clumps were much smaller in the treated mice.
The treatment also helped lower levels of another harmful protein called Tau. Most importantly, the mice that received the treatment showed better memory skills. They were able to learn and remember things just like healthy mice do.
While this is very promising for mice, it does not mean the same will happen in people yet. The study notes that more careful testing is needed before trying this in humans. Researchers say we must be very careful about how we test new treatments for brain diseases.