Good news: Alzheimer’s disease has long been seen as irreversible — but a new study in mice challenges that idea.
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Good news: Alzheimer’s disease has long been seen as irreversible — but a new study in mice challenges that idea. American researchers say they have fully reversed the condition in lab mice, even in animals with advanced disease.
The team, from Case Western Reserve University, University Hospitals, and the Louis Stokes Cleveland VA Medical Center, published their findings in the journal Cell Reports Medicine. They used an experimental compound called P7C3-A20 on two types of Alzheimer’s-like mice — one with amyloid-related mutations and one with tau-related mutations. Both developed severe brain damage and memory problems similar to human Alzheimer’s.
The drug works by restoring a key molecule called NAD+, which helps brain cells produce energy and stay alive. NAD+ naturally drops as we age, but in Alzheimer’s patients, that drop is much steeper. Without enough NAD+, brain cells struggle and inflammation rises.
When young mice were given the compound, it stopped the disease before it started. More surprisingly, when older mice with full-blown Alzheimer’s received treatment, their brains recovered. Their thinking abilities returned, and signs of the disease in their brains cleared up.
The researchers say this offers a powerful message of hope: Alzheimer’s damage may not be permanent. The brain may be able to repair itself under the right conditions. The study also used a blood test already approved for Alzheimer’s patients to confirm the recovery, which makes the findings more relevant to future human trials.
Still, the researchers caution that these results are from mice only. Human tests are needed before any treatment could be made available.
If those trials succeed, this approach could completely change how we think about Alzheimer’s care — moving from simply slowing the disease to actually restoring lost brain function.