๐ง Your Brain Secretly Recruits Blood Immune Cells Starting in Middle Age, Stanford Finds
Stanford researchers discovered that immune cells from your bloodstream actually migrate into your brain as early as middle age, where they transform into specialized microglia โ the brain's own immune defenders. The finding, published in Nature, overturns decades of thinking that the brain's immune system stays sealed off from the rest of the body. Strangely, it appears to be a uniquely human phenomenon โ the same migration doesn't happen in mice or non-human primates. Could this mean age-related brain diseases are partly driven by how the body's immune system responds to aging?
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