Longevity & AgingTau Protein Sabotages Mitochondria in Alzheimer's — and Blocking It Helps
A new study from Stanford reveals that tau, a protein central to Alzheimer's disease, harms brain cells by disrupting mitochondria — the energy factories inside cells. Tau forces electrons to flow backward in a process called reverse electron transport, generating toxic reactive oxygen species, cellular stress, and inflammation. When researchers blocked this reverse flow in fruit flies and mice, learning and memory improved and cellular damage decreased. Human lab-grown cells and patient brain tissue also showed promising signs that blocking this mechanism could protect neurons. Two of the study's authors have launched a biotech company to develop drugs targeting this pathway, signaling real-world commercial interest in the findings.
