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- W2022800855 abstract "Oxidative stress is a major factor implicated in the degeneration of cholinergic neurons in Alzheimer's disease. Presently, cholinesterase inhibitors are the mainstay of therapy for Alzheimer's disease. However, the potential of cholinesterase inhibitors as antioxidants, an important aspect for neuroprotection, has not been properly investigated. Therefore, the present study was designed to investigate the influence of antidementia drugs, tacrine and donepezil, on biochemical markers of oxidative stress, glutathione (GSH) and malondialdehyde (MDA), and acetylcholinesterase activity in the brain in a streptozotocin-induced experimental model of dementia in mice. Intracerebral (i.c.) injection of streptozotocin at a dose of 0.5 mg/kg on 1st and 3rd days caused significant deficits in memory function, as evaluated in a passive avoidance test and Morris Water Maze (spatial memory) test 14 days after the 1st dose. Mice were treated with tacrine and donepezil at a dose of 5 mg/kg orally in separate groups. Both tacrine- and donepezil-treated mice showed a significant improvement of the streptozotocin (i.c.)-induced memory impairment. Streptozotocin (i.c.) administration caused a significant decrease in GSH and increase in MDA as compared to control, indicating a state of oxidative stress in the brain of streptozotocin (i.c.) amnesic mice. Treatment of streptozotocin (i.c.) amnesic mice with tacrine or donepezil did not cause significant changes in GSH and MDA levels in the brain as compared to control. Streptozotocin amnesic mice had raised acetylcholinesterase activity in the brain while there was a significant decrease in brain acetylcholinesterase activity in tacrine- and donepezil-treated streptozotocin (i.c.) mice. Thus, results indicate that tacrine and donepezil, beside inhibition of acetylcholinesterase, may also suppress oxidative stress." @default.
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- W2022800855 date "2003-10-01" @default.
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- W2022800855 title "P.4.047 Memory deficits and neuropathology induced by central amyloid-beta injections in rats" @default.
- W2022800855 doi "https://doi.org/10.1016/s0924-977x(03)92241-3" @default.
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