Aggregation and accumulation of beta-amyloid peptide (Abeta) in brain tissues contribute to the pathogenesis of Alzheimer's disease. Therefore, the promotion of Abeta clearance is one of the key targets for preventing and treatment Alzheimer's disease. Studies proved that some traditional Chinese medicine (TCM) compounds and extracts could impact the activity of degrading enzyme in amyloid peptide, the transport of hemato encephalic barrier and the phagocytosis of microglial cells, promote Abeta clearance, and improve learning and memory of animal models with Alzheimer's disease. In this review, we made an summary for the relations between Abeta and Alzheimer's disease, the Abeta clearance mechanism and the clearance effect of traditional Chinese medicines.
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