Science Daily·3 min read·medium
Immune cells flood into the aging brain, Stanford scientists discover
✦AI Summary
Stanford researchers have discovered that immune cells from the body increasingly enter the brain as humans age. This finding challenges the long-held belief that the brain is a closed system and could lead to new treatments for neurological diseases.
For decades, scientists have generally viewed the brain's immune system as largely separate from the immune defenses operating throughout the rest of the body. The brain has its own specialized immune cells, along with the blood-brain barrier, which restricts many substances and cells from entering brain tissue.
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