Blood test could detect Alzheimer’s up to 16 years before symptoms begin

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A simple blood test could predict if a patient will develop Alzheimer’s disease up to 16 years before symptoms begin, a new study finds.

By measuring changes in the levels of a protein in the blood, called neurofilament light chain, researchers believe any rise in levels of the protein could be an early sign of the disease, according to the study published Monday in the journal Nature Medicine.

NfL is a “marker in the blood which gives an indication of nerve cell loss in the brain,” explained lead researcher Mathias Jucker, professor of cell biology of neurological diseases at the German Center for Neurodegenerative Diseases. ”The more neurofilament you have in the blood, the more brain damage you have,” he said.

There is still no effective treatment for Alzheimer’s, but Jucker thinks the new blood test will be “very important for clinical studies.” He hopes the test will allow researchers to monitor the effectiveness of new treatments before people have started to experience symptoms, by measuring how levels of the protein are affected.

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