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Reversing age-linked memory loss

机译:逆转与年龄有关的记忆丧失

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摘要

Normal ageing results in the decline of higher cognitive functions, such as working memory and the ability to concentrate. A connection between the neurochemical environment and neuronal function in the prefrontal cortex (PFC) has been proposed as a key factor modulating these declines. Recordings from PFC neurons in young, 'middle-aged' and older monkeys during a learning task reveal a significant decline in persistent firing in the aged PFC neurons that are responsible for maintaining the signal in working memory during a delay following a cue. This firing level can be rescued by restoring an optimal neurochemical environment present at younger ages through inhibition of cyclic AMP signalling and closure of the potassium channels that weaken network connectivity. These findings suggest potential therapeutic targets for cognitive enhancers in humans.
机译:正常的衰老导致较高的认知功能下降,例如工作记忆和专心致志。前额叶皮质(PFC)中神经化学环境与神经元功能之间的联系已被提议作为调节这些下降的关键因素。在学习任务期间,来自年轻,“中年”和较大猴子的PFC神经元的记录显示,老年PFC神经元持续放电的现象显着下降,这负责在提示后的延迟期间将信号维持在工作记忆中。可以通过抑制循环AMP信号传导和关闭削弱网络连通性的钾通道来恢复年轻时存在的最佳神经化学环境,从而挽救这一发射水平。这些发现提示了人类认知增强剂的潜在治疗靶标。

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  • 来源
    《Nature》 |2011年第7357期|p.457|共1页
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  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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