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Biochem/physiol Actions
PF-04447943 is a potent selective brain penetrant phosphodiesterase PDE9A inhibitor both potency (8 nM) and selectivity (>10 µM versus all the PDEs except PDE1C at >1 µM). It has been investigated for the treatment of cognitive disorders including Alzheimer′s Disease. PF-04447943 increased neurite outgrowth and synapse formation in hippocampal neurons in culture, exhibited synaptic stabilization in an amyloid precursor protein (APP) transgenic mouse model, and improved memory and enhanced attention in several animal models.
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