Protective effect of β-asarone on PC12 cells injury induced by Aβ1-42 astrocytic activation Protective effects of notoginsenoside R1 against amyloid-β(1-42) induced mitochondrial apopototic death in SH-SY5Y cells Effect of hyperforin on learning and memory abilities and Aβ1-42, βAPP and BACE1 protein expressions in hippocampus of Alzheimer‘s disease model mice