Outer layer of Vb neurons in medial entorhinal cortex project to hippocampal dentate gyrus in mice

Naoki Yamamoto, Jun Yokose, Kritika Ramesh, Takashi Kitamura, Sachie K. Ogawa

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Entorhinal cortical (EC)-hippocampal (HPC) circuits are crucial for learning and memory. Although it was traditionally believed that superficial layers (II/III) of the EC mainly project to the HPC and deep layers (V/VI) receive input from the HPC, recent studies have highlighted the significant projections from layers Va and VI of the EC into the HPC. However, it still remains unknown whether Vb neurons in the EC provide projections to the hippocampus. In this study, using a molecular marker for Vb and retrograde tracers, we identified that the outer layer of Vb neurons in the medial EC (MEC) directly project to both dorsal and ventral hippocampal dentate gyrus (DG), with a significant preference for the ventral DG. In contrast to the distribution of DG-projecting Vb cells, anterior thalamus-projecting Vb cells are distributed through the outer to the inner layer of Vb. Furthermore, dual tracer injections revealed that DG-projecting Vb cells and anterior thalamus-projecting Vb cells are distinct populations. These results suggest that the roles of MEC Vb neurons are not merely limited to the formation of EC-HPC loop circuits, but rather contribute to multiple neural processes for learning and memory.

本文言語英語
論文番号5
ジャーナルMolecular Brain
17
1
DOI
出版ステータス出版済み - 12月 2024
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 分子生物学
  • 細胞および分子神経科学

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