– PF04802367 is a potent, highly selective GSK-3 inhibitor with IC50 of 2.1 nM for human GSK-3? in enzyme assays; shows equal effectivity against GSK-3? and GSK-3? with IC50 of 10.0 and 9.0 nM respectively in mobility shift assays, inhibits phosphorylation of tau with an IC50 of 466 nM in a stable inducible CHO cell line over-expressing GSK-3? and substrate tau; modulates tau phosphorylation in?vitro and in?vivo.