Exploring the Brain, One Neuron at a Time

Scientists reversed multiple signs of aging in mice by restoring a brain protein called Menin, suggesting this decline could be a key driver of aging itself. Restoring Menin reversed inflammation, cognitive decline, weakened bones, and thinner skin—opening a promising new target for healthy aging interventions.

Hidden inside the skull lies an immune organ that acts as the brain's first-line defense against cancer, a discovery that upends our understanding of brain immunology. Strengthening this local immune response improved tumor rejection and survival in mice, pointing toward radically new brain cancer treatments.

What we've learned about brain anatomy from century-old textbooks may be fundamentally wrong—axons aren't smooth tubes but rather pearl-like beads that change with neural activity. These tiny structures could play a crucial role in controlling how fast electrical signals zip through the brain.

The human brain undergoes dramatic reorganization between ages 50 and 75, including a shift in immune cells that become more inflammatory and weakening of the blood-brain barrier. This transformation may explain why aging sharply increases vulnerability to Alzheimer's and other neurodegenerative diseases.