血检能预估阿尔茨海默病发病时间

Core Insights - A research team from the University of Washington School of Medicine has developed a convenient blood test method that can estimate an individual's risk of developing Alzheimer's disease and predict the onset time [1] - The method focuses on detecting an abnormal Tau protein, which accumulates in the brain before symptoms like memory loss appear [1] - If confirmed through large-scale studies, this method could provide opportunities for early intervention in neurodegenerative diseases [1] Group 1 - The abnormal Tau protein forms fibrous tangles that hinder neural signal transmission, with traditional diagnosis relying on brain imaging, which is complex and costly [1] - The research team analyzed blood and cognitive data from 600 elderly individuals in two large studies, identifying an abnormal protein called p-tau217 [1] - It was found that the ratio of p-tau217 to normal Tau protein in the blood increased before cognitive symptoms appeared, with a consistent rate of increase among individuals [1] Group 2 - The team constructed a model combining age and p-tau217 levels to predict the onset of the disease, with an error margin of 3 to 4 years [1] - This method provides quantifiable biomarkers that could significantly lower the barriers and costs of clinical trials [1] - Accurate predictions of disease onset and timing can aid in designing preventive or delaying intervention strategies [1] Group 3 - The next steps for the team include incorporating more related protein indicators to reduce error margins [2] - Further research with a more diverse sample is needed to confirm the results [2]