Abstract: The present invention concerns compositions and methods for the treatment of neurodegenerative diseases in which the cognitive functions are altered, such as observed in Alzheimer's disease. More particularly, the invention presents a strategy for human clinical monitoring of the activity and/or effectiveness of neuroprotective treatments, based on biochemical assay of certain platelet parameters, and thus can be done by blood sampling. The invention also concerns methods, tools, constructions and compositions suitable for implementing these strategies.