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We studied the effect of ethyl acetate (EA) fraction from Acer okamotoanum on cognitive improvement and protective abilities in amyloid beta (Aβ)25–35 peptide-injected Alzheimer’s disease (AD) mice. EA was oral administration at 100 and 200 mg/kg/day during the 14 days. We studied the protective effect of EA against AD on the basis of behavioral tests including T-maze test, Novel object recognition test, and Morris water maze test. Control group injected with Aβ25–35 showed significant impairments in memory function. But the oral administration of EA (EA 100 and EA 200 groups) improved the cognition and memory function. In addition, EA against Aβ25–35 peptide has been shown to inhibit lipid peroxidation levels and nitric oxide production in tissues. Acetylcholinesterase (AChE) was elevated in the brain by Aβ25–35 peptide, whereas administration of EA (EA 100 and EA 200 groups) significantly decreased AChE level. Our results indicated that EA improves learning and long-term memory against Aβ25–35 peptide–caused deficit through attenuation of oxidative stress.

Acer okamotoanum improves cognition and memory function in Aβ25–35-induced Alzheimer’s mice model