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首页> 外文期刊>Neuron >Distinct Contribution of Adult-Born Hippocampal Granule Cells to Context Encoding
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Distinct Contribution of Adult-Born Hippocampal Granule Cells to Context Encoding

机译:成人出生的海马颗粒细胞对上下文编码的不同贡献

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Adult-born granule cells (abGCs) have been implicated in cognition and mood; however, it remains unknown how these cells behave in vivo. Here, we have used two-photon calcium imaging to monitor the activity of young abGCs in awake behaving mice. We find that young adult-born neurons fire at a higher rate in vivo but paradoxically exhibit less spatial tuning than their mature counterparts. When presented with different contexts, mature granule cells underwent robust remapping of their spatial representations, and the few spatially tuned adult-born cells remapped to a similar degree. We next used optogenetic silencing to confirm the direct involvement of abGCs in context encoding and discrimination, consistent with their proposed role in pattern separation. These results provide the first in vivo characterization of abGCs and reveal their participation in the encoding of novel information.
机译:成人出生的颗粒细胞(abGCs)与认知和情绪有关。然而,这些细胞在体内的行为尚不清楚。在这里,我们已使用双光子钙成像来监测清醒行为小鼠中年轻abGC的活性。我们发现,年轻的成年神经元在体内以较高的速率发射,但与成熟的神经元相比,自相矛盾地表现出更少的空间调节。当在不同的环境中展示时,成熟的颗粒细胞对其空间表示进行了强有力的重映射,而少数经过空间调整的成年新生细胞以相似的程度被重映射。接下来,我们使用光遗传学沉默来确认abGC直接参与情境编码和区分,与其拟议的模式分离作用相一致。这些结果提供了abGCs的第一个体内表征,并揭示了它们参与新型信息的编码。

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