Brain HealthBreathing Low-Oxygen Air Reverses Fatal Brain Disease in Mice
Researchers discovered that breathing low-oxygen air can rescue a deadly brain disease caused by broken mitochondrial protein maintenance. Mice lacking HTRA2, a mitochondrial protease, develop severe neurodegeneration and die early — but continuous hypoxia reversed striatal brain degeneration and extended their lifespan. The team found HTRA2 partners with CLPB, a protein that untangles aggregates. Without either protein, key building blocks of the mitochondrial electron transport chain clump together, crippling energy production. This protein pile-up impairs the cell's ability to consume oxygen, paradoxically creating too much local oxygen — which hypoxia corrects. The findings open a new therapeutic avenue for a broad class of mitochondrial diseases.
