Fig. 3.
Caffeine regulates tau phosphorylation in cholesterol-fed rabbits in a dose-dependent manner. Western blots (a) and densitometric analyses (b) show that caffeine at 30 mg/day but not at 0.5 mg/day reduces tau phosphorylation in hippocampus from rabbits fed a 2% cholesterol-enriched diet. Tau phosphorylation is detected by PHF-1 and CP13 antibodies. **p<0.01 versus controls, #p<0.05 versus rabbits fed with 2% cholesterol diet.