摘要
Alzheimer's disease(AD) is a progressive and irreversible neurodegenerative disorder that is characterized by memory loss and a decline in activities of daily life. More than 50 million people worldwide are affected by AD, and this number will continue to rise over 100 million within next three decades. Its major pathological features are the extracellular plaque deposits of the β-amyloid peptide and the intracellular flame-shaped neurofibrillary tangle-aggregation of hyperphosphorylated tau-proteins(pTau).