Young dentate granule cells mediate pattern separation, whereas old granule cells facilitate pattern completion.

Young dentate granule cells mediate pattern separation, whereas old granule cells facilitate pattern completion.
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年轻的齿状颗粒细胞介导模式分离,而老颗粒细胞则促进模式完成。

DOI:
10.1016/j.cell.2012.01.046
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发表时间:
2012-03-30
期刊:
影响因子:
64.5
通讯作者:
Tonegawa S
Tonegawa S
中科院分区:
生物学1区
文献类型:
--
作者:
Nakashiba T;Cushman JD;Pelkey KA;Renaudineau S;Buhl DL;McHugh TJ;Rodriguez Barrera V;Chittajallu R;Iwamoto KS;McBain CJ;Fanselow MS;Tonegawa S

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成年出生的颗粒细胞(GC)是海马齿状回中的一小部分细胞,在功能整合到神经元网络(年轻GC)后的前几周内高度活跃,将其与不太活跃的老年出生的GC和发育产生的齿状GC(一起,老年GC)的主要群体区分开来。我们创造了一种转基因小鼠,其中老年GC的输出被特异性抑制,而留下相当大一部分年轻的GC完好无损。这些小鼠表现出增强或正常的模式之间的相似的背景下,减少年轻的GC通过X射线照射去除分离。此外,突变小鼠在快速模式完成方面表现出缺陷。因此,相似背景的模式分离需要成年出生的年轻GC,而老年GC是不必要的,而老年GC有助于通过模式完成快速回忆。我们的数据表明,随着成人出生的GC年龄的增长,它们的功能从模式分离切换到快速模式完成。
Adult-born granule cells (GCs), a minor population of cells in the hippocampal dentate gyrus, are highly active during the first few weeks following functional integration into the neuronal network (young GCs), distinguishing them from less active older adult-born GCs and the major population of dentate GCs generated developmentally (together, old GCs). We created a transgenic mouse in which output of old GCs was specifically inhibited while leaving a substantial portion of young GCs intact. These mice exhibited enhanced or normal pattern separation between similar contexts that was reduced following removal of young GCs by X-ray irradiation. Furthermore, mutant mice exhibited deficits in rapid pattern completion. Therefore, pattern separation of similar contexts requires adult-born young GCs while old GCs are unnecessary, whereas older GCs contribute to the rapid recall by pattern completion. Our data suggest that as adult-born GCs age, their function switches from pattern separation to rapid pattern completion.
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