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Distribution pattern of thalamo-cortical inputs to the enclosed type parvalbumin expressing interneurons in the mouse primary somatosensory cortex

Research Project

Project/Area Number 18K06487
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionKumamoto University

Principal Investigator

Shigematsu Naoki  熊本大学, 大学院生命科学研究部(医), 助教 (30469613)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsギャップ結合 / コネキシン36 / パルブアルブミン / GABAニューロン / バレル / ミニバレル / barrel cortex / parvalbumin / tracer injection / electron microscopy
Outline of Final Research Achievements

In the present study, we tried to figure out the distribution pattern of thelemo-cortical input against the parvalbumin GABAergic interneurons (PV neuron) in layer 4 of the mouse primary somatosensory cortex by using morphological strategies including CLSM microscopy and immunoelectron microscopy. From our previous study, PV neuron possess four subtypes depending on the location of soma and on the field of the dendritic arborization. Data from our present observation showed the distribution patterns of axon terminals from thalamus had no subclass selectivity.
Take into consider out previous study that represent the subclass specific connection patterns via gap junctions of PV neurons in this region, our results from the present study suggest the possibility of the sensory information from thalamus which projects randomly against the sensory cortex. And the information may acquire the information segregation through gap junctions formed by the PV neurons in the area.

Academic Significance and Societal Importance of the Research Achievements

大脳皮質は哺乳動物の脳内において最大の領域を占め、ヒトでは知覚・記憶・運動・思考などの高次脳機能を司る機関である。本研究では感覚入力の処理を行う体性感覚野に注目した。大脳皮質への主要な入力を行う視床の神経線維を可視化し、体性感覚野に存在する特定のGABAニューロンへの分布パターンを観察した。
観察の結果、視床からの入力にGABAニューロンへの細胞選択性は存在しなかった。これまでに行ってきた研究の成果を合わせて考察すると、大脳皮質の特定のGABAニューロンが視床から無作為に入ってくる情報を取捨選択している可能性が考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2019 2018

All Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] 体性感覚野ミニバレル領域におけるパルブアルブミン陽性ニューロンの分布と形態の3次元的解析2019

    • Author(s)
      重松直樹 福田孝一
    • Organizer
      124回 日本解剖学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Gap junctions mediate the connectivity among different subtypes of parvalbumin-positive interneurons in layer 4 of the mouse barrel cortex2018

    • Author(s)
      Naoki Shigematsu, Takaichi Fukuda
    • Organizer
      SfN's 48th annual meeting, Neuroscience 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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