Okello EJ

Perry EK

Savelev SU

The primary target of licensed drugs for the treatment of Alzheimer\u27s disease is the inhibition of the enzyme acetylcholinesterase, although preventing β-amyloidosis is a prime target for drugs in development. The in vitro dual anti-cholinesterase and β-secretase activities of Camellia sinensis L. extract (tea) is reported. Green and black tea inhibited human acetylcholinesterase (AChE) with IC50 values of 0.03 mg/mL and 0.06 mg/mL respectively, and human butyrylcholinesterase (BuChE) with IC50 values 0.05 mg/mL. Green tea at a final assay concentration of 0.03 mg/mL inhibited β-seretase by 38%. These novel findings suggest that tea infusions contain biologically active principles, perhaps acting synergisticaly, that may be used to retard the progression of the disease assuming that these principles, yet to be identified, reach the brain. Copyright \ua9 2004 John Wiley &amp; Sons, Ltd

In vitro anti-β-secretase and dual anti-cholinesterase activities of Camellia sinensis L. (tea) relevant to treatment of dementia

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