Abstract
Recently, aluminium (Al) has been proposed to be one of the environmental factors responsible for cause Alzheimer's disease (AD). However, the relationship between Al and AD is controversial. To investigate the effects of subchronic Aluminium-maltolate (Al (mal)(3)) exposure on the behavioral, electrophysiological functions. Forty Sprague-Dawley (SD) rats were randomly distributed into five groups. Over two months, rats in the saline group received daily intraperitoneal (i.p.) injections 0.9% saline, rats in the maltolate group received 7.56 mg/kg maltolate, and rats in the 0.27, 0.54, 1.08 mg/kg Al (mal)(3) groups received i.p. administrations of these three doses, respectively. Neural behavior was assessed in Morris water maze. Long-term potentiation (LTP) in hippocampus was recorded. Al content in the neocortex was determined using a graphite furnace atomic absorption spectrophotometer. Our studies indicate that subchronic Al (mal)(3) exposure significantly impaired spatial learning and memory abilities, suppressed the LTP in the CA1 hippocampal area, and elevated Al levels in cerebral cortex in a dose-dependent fashion. In conclusion, low doses of Al (mal)(3) can still lead to dramatic Al accumulation in the brain, severely impair learning and memory capacities, and hippocampal LTP.
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