A 'microprotein' significantly raises the risk of disease in later life if it is mutated, scientists say — with a quarter of those of European ancestry already having the change.Researchers at the University of Southern (USC), in , analyzed data from more than 8,000 people and found that when a protein — named SHMOOSE — was deactivated it led to a 20 to 50 percent higher risk of the condition.Alzheimer's disease is thought to be caused by an abnormal build-up of proteins in the brain, although what leads to this is not clear. Being older, having a family history of the disease and a sedentary lifestyle are all thought to raise the risk.
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