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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Paradoxical influence of hippocampal neurogenesis on working memory
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Paradoxical influence of hippocampal neurogenesis on working memory

机译:海马神经发生对工作记忆的悖论影响

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摘要

To explore the function of adult hippocampal neurogenesis, we ablated cell proliferation by using two independent and complementary methods: (ⅰ) a focal hippocampal irradiation and (ⅱ) an inducible and reversible genetic elimination of neural progenitor cells. Previous studies using these methods found a weakening of contextual fear conditioning but no change in spatial reference memory, suggesting a supportive role for neurogenesis in some, but not all, hippocampal-dependent memory tasks. In the present study, we examined hippocampal-dependent and -independent working memory using different radial maze tasks. Surprisingly, ablating neurogenesis caused an improvement of hippocampal-dependent working memory when repetitive information was presented in a single day. These findings suggest that adult-born cells in the dentate gyrus have different, and in some cases, opposite roles in distinct types of memory.
机译:为了探索成年海马神经发生的功能,我们通过使用两种独立且互补的方法来消融细胞增殖:(ⅰ)局灶性海马照射和(ⅱ)诱导性和可逆性遗传消除神经祖细胞。以前使用这些方法的研究发现,上下文恐惧条件减弱,但空间参考记忆没有改变,表明在某些(但不是全部)海马依赖性记忆任务中神经发生具有支持作用。在本研究中,我们使用不同的径向迷宫任务检查了海马依赖性和非依赖性工作记忆。出人意料的是,当一天出现重复信息时,消融神经发生可改善海马依赖性工作记忆。这些发现表明,齿状回中的成年细胞在不同类型的记忆中具有不同的作用,在某些情况下还具有相反的作用。

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