text:  PfC PDE9 Tg+, rep6 Prefrontal Cortex Tg2576 mouse after 28 days of chronic sc PF-04447943 infusion age: 4 months; strain: B6SJLF1 (F1 cross between C57Bl/6 and SJL); genotype/variation: Tg+ (over-expressing human mutant amyloid precursor protein); tissue: Prefrontal Cortex; treated with: PF-04447943 (PDE9A-inhibitor) for 28 days