Adult-born hippocampal neurons bidirectionally modulate entorhinal inputs into the dentate gyrus

Adult-born hippocampal neurons bidirectionally modulate entorhinal inputs into the dentate gyrus
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DOI:
10.1126/science.aat8789
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发表时间:
2019-05-10
期刊:
影响因子:
56.9
通讯作者:
Hen, Rene
Hen, Rene
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Luna, Victor M.;Anacker, Christoph;Hen, Rene

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年轻的成年出生的颗粒细胞(abGCs)在齿状回(DG)的认知和情绪有深远的影响。然而,目前还不清楚如何abGCs独特地有助于当地DG信息处理。我们发现,在DG的abGCs的行动取决于传入传入的起源。响应于外侧内嗅皮层(LEC)输入,abGCs通过组II代谢型谷氨酸受体对成熟颗粒细胞(mGCs)施加单突触抑制。相比之下,响应于内侧内嗅皮层(MEC)输入,abGC通过N-甲基-D-天冬氨酸受体直接激发mGC。因此,abGC的关键功能可能是调节LEO驱动的上下文信息与MEC驱动的空间信息的相对突触强度,以形成DG中的不同神经表征。
Young adult-born granule cells (abGCs) in the dentate gyrus (DG) have a profound impact on cognition and mood. However, it remains unclear how abGCs distinctively contribute to local DG information processing. We found that the actions of abGCs in the DG depend on the origin of incoming afferents. In response to lateral entorhinal cortex (LEC) inputs, abGCs exert monosynaptic inhibition of mature granule cells (mGCs) through group II metabotropic glutamate receptors. By contrast, in response to medial entorhinal cortex (MEC) inputs, abGCs directly excite mGCs through N-methyl-D-aspartate receptors. Thus, a critical function of abGCs may be to regulate the relative synaptic strengths of LEO-driven contextual information versus MEC-driven spatial information to shape distinct neural representations in the DG.