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Piracetam improves cognitive function in animals and in human beings, but its mechanism of action is still not completely known. In the present study, we investigated whether enzymes involved in extracellular adenine nucleotide metabolism, adenosine triphosphate diphosphohydrolase (NTPDase), 5′-nucleotidase and adenosine deaminase (ADA) are affected by piracetam in the hippocampus and cerebral cortex...
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