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Here’s a rare way that an Alzheimer’s protein can spread

Author: Laura Sanders / Source: Science News

Amyloid-beta illustration
BRAIN BUILDUP Amyloid-beta (illustrated in brown) from vials of contaminated growth hormone spread in the brains of mice, researchers found.

An Alzheimer’s protein found in contaminated vials of human growth hormone can spread in the brains of mice. That finding, published online December 13 in Nature, adds heft to the idea that, in very rare cases, amyloid-beta can travel from one person’s brain to another’s.

Decades ago, over a thousand young people in the United Kingdom received injections of growth hormone derived from cadavers’ brains as treatment for growth deficiencies.

Four of these people died with unusually high levels of A-beta in their brains, a sign of Alzheimer’s disease (SN: 10/17/15, p. 12). The results…

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