for PET studies was described previously35 (link),41 (link) with minor modification in this work. Briefly, PET scans were carried
out with an Inveon PET scanner (Siemens Medical Solutions, Knoxville,
TN). Sprague–Dawley rats were kept under anesthesia using 1–2%
(v/v) isoflurane during the scan. The radiotracer (ca. 0.5 mCi/150
μL) was injected into the tail vein via a preinstalled catheter.
A dynamic scan in the three-dimensional (3D) list mode was acquired
for 60 min. For pretreatment studies, a solution of PF06447475 (3
mg/kg) in 300 μL saline containing 10% ethanol and 5% Tween
80 was injected via the pre-embedded tail vein catheter at 30 min
prior to tracer injection. As we previously reported,40 (link)−42 (link) the PET dynamic images were reconstructed using ASIPro VW software
(Analysis Tools and System Setup/Diagnostics Tool, Siemens Medical
Solutions). Volumes of interest, including the hippocampus, cortex,
cerebellum, striatum, and thalamus, were placed using ASIPro software.
The radioactivity was decay-corrected and expressed as the standard
uptake value: SUV = (radioactivity per mL tissue/injected radioactivity)
× body weight.