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Crude caffeine reduces memory impairment and amyloid ß(1-42) levels in an Alzheimer's mouse model

Author(s): Chu YF, Chang WH, Black RM, Liu JR, Sompol P, et al.

Abstract

Alzheimer’s disease (AD), a chronic neurodegenerative disorder associated with the abnormal accumulations of amyloid β (Aβ) peptide and oxidative stress in the brain, is the most common form of dementia among the elderly. Crude caffeine (CC), a major by-product of the decaffeination of coffee, has potent hydrophilic antioxidant activity and may reduce inflammatory processes. Here, we showed that CC and pure caffeine intake had beneficial effects in a mouse model of AD. Administration of CC or pure caffeine for 2 months partially prevented memory impairment in AD mice, with CC having greater effects than pure caffeine. Furthermore, consumption of CC, but not pure caffeine, reduced the Aβ1–42 levels and the number of amyloid plaques in the hippocampus. Moreover, CC and caffeine protected primary neurons from Aβ-induced cell death and suppressed Aβ-induced caspase-3 activity. Our data indicate that CC may contain prophylactic agents against the cell death and the memory impairment in AD.

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