BF-170 is a new probe for neurofibrillary tangles (tau fibrils) with greater binding affinity to tau than to Aβ fibrils.
BF-170 is a new probe for neurofibrillary tangles (tau fibrils). It exhibits greater binding affinity to tau than to Aβ fibrils, EC50 = 221 nM vs. EC50 = 786 nM (Ki for Aβ > 5,000 nM). BF-170 demonstrates fast clearance from the brain; clearly visualizes neurofibrillary tangles, neuropil threads, and paired helical filament-type neuritis. BF-70 may become one of the candidate compounds for in vivo imaging of tau pathology associated with Alzheimer′s disease and is a useful tool in distinguishing among tau and Aβ fibrils specifically in AD.