Probing the pathology of impaired cognition

October 29, 2018 by Bill Snyder, Vanderbilt University
Credit: CC0 Public Domain

Neurofilament light (NFL) is a support protein within large axons in the brain's white matter that supports nerve signal transmission. When axons are injured, increased NFL concentrations are found in the cerebrospinal fluid that surrounds the brain, representing an important biomarker for axonal breakdown.

Elevated NFL levels correlate with extensive white matter disease on brain imaging in older adults with and dementia. Whether established biomarkers of Alzheimer's disease, including amyloid and tau, affect this correlation is less clear.

Now Angela Jefferson, Ph.D., and colleagues have shown that NFL correlates with more sensitive measurements of white matter microstructure assessed by . The association was particularly strong in participants with elevated tau proteins that comprise the characteristic tangles within neurons in Alzheimer's disease.

Their findings, published this month in Neurobiology of Aging, are a step toward earlier and more precise detection of neuropathology underlying that may lead to new targeted therapies, the researchers concluded.

Explore further: Machine learning IDs markers to help predict Alzheimer's

More information: Elizabeth E. Moore et al. Neurofilament relates to white matter microstructure in older adults, Neurobiology of Aging (2018). DOI: 10.1016/j.neurobiolaging.2018.06.023

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