• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Functional reconstruction of neural circuits using differentiation of astrocytes into neurons

Research Project

Project/Area Number 21K19425
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 51:Brain sciences and related fields
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Tanaka Kohichi  東京医科歯科大学, 難治疾患研究所, 教授 (80171750)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsアストロサイト / 分化転換 / 神経変性疾患 / 神経細胞
Outline of Research at the Start

神経変性疾患を治療するためには、神経細胞を補充するのみならず、補充された神経細胞が既存の神経回路と機能的な結合をする必要がある。従来、iPS細胞から分化させた神経細胞の移植が行われてきたが、神経回路の再構築は困難である。最近アストロサイトのPtbp1遺伝子をノックダウンすると、アストロサイトが神経細胞に分化転換し、既存の神経回路に組み込まれることが示された。しかし、分化転換の効率は十分ではない。本研究では、脳の全ての部位におけるアストロサイトの分化転換能を解析できるin vivoの系を開発する。その系を用いて、アストロサイトから神経細胞への分化転換を阻害する遺伝子群を同定する。

Outline of Final Research Achievements

To treat neurodegenerative diseases, it is necessary not only to replenish lost neurons, but also to allow the replenished neurons to functionally connect with existing neuronal circuits. It has recently been shown that knockdown of the Ptbp1 gene in astrocytes can cause astrocytes to differentiate into cells with the same characteristics as the neurons at that site and integrate into existing neural circuits, but the efficiency of this differentiation is not sufficient. In this study, the Ptbp1 gene was deleted from astrocytes in all regions of the brain, and an in vivo system was developed to analyze the differentiation and conversion ability of astrocytes in each region. However, it was found that deletion of the Ptbp1 gene did not result in differentiation conversion from astrocytes to neurons.

Academic Significance and Societal Importance of the Research Achievements

神経変性疾患を治療するためには、失われた神経細胞を補充するのみならず、補充された神経細胞が既存の神経回路と機能的な結合をする必要がある。最近アストロサイトのPtbp1遺伝子をノックダウンすると、アストロサイトがその部位の神経細胞と同じ特徴を持った細胞に分化転換し、既存の神経回路に組み込まれることが示されたが、分化転換の効率は十分ではない。本研究では、アストロサイトから神経細胞への分化転換を阻害する遺伝子を同定し、その効率化を目指した。しかし、Ptbp1遺伝子の欠損ではアストロサイトから神経細胞への分化転換が起こらないことが明らかになった

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 5 results)

  • [Int'l Joint Research] Max Planck Institute(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Helsinki(フィンランド)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Functional synergy of a human-specific and an ape-specific metabolic regulator in human neocortex development2024

    • Author(s)
      Xing Lei、Gkini Vasiliki、Nieminen Anni I.、Zhou Hui-Chao、Aquilino Matilde、Naumann Ronald、Reppe Katrin、Tanaka Kohichi、Carmeliet Peter、Heikinheimo Oskari、P??bo Svante、Huttner Wieland B.、Namba Takashi
    • Journal Title

      Nature Communications

      Volume: 15 Issue: 1

    • DOI

      10.1038/s41467-024-47437-8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Astrotactin 2 ( <scp>ASTN2</scp> ) regulates emotional and cognitive functions by affecting neuronal morphogenesis and monoaminergic systems2023

    • Author(s)
      Ito Takahiro、Yoshida Mikio、Aida Tomomi、Kushima Itaru、Hiramatsu Yuka、Ono Maiko、Yoshimi Akira、Tanaka Kohichi、Ozaki Norio、Noda Yukihiro
    • Journal Title

      Journal of Neurochemistry

      Volume: in press Issue: 2 Pages: 211-229

    • DOI

      10.1111/jnc.15790

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glial modulation of the parallel memory formation2023

    • Author(s)
      Kanaya Teppei、Ito Ryo、Morizawa Yosuke M.、Sasaki Daichi、Yamao Hiroki、Ishikane Hiroshi、Hiraoka Yuichi、Tanaka Kohichi、Matsui Ko
    • Journal Title

      Glia

      Volume: 71 Issue: 10 Pages: 2401-2417

    • DOI

      10.1002/glia.24431

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Synaptic pruning through glial synapse engulfment upon motor learning2022

    • Author(s)
      Morizawa Yosuke M.、Matsumoto Mami、Nakashima Yuka、Endo Narumi、Aida Tomomi、Ishikane Hiroshi、Beppu Kaoru、Moritoh Satoru、Inada Hitoshi、Osumi Noriko、Shigetomi Eiji、Koizumi Schuichi、Yang Guang、Hirai Hirokazu、Tanaka Kohichi、Tanaka Kenji F.、Ohno Nobuhiko、Fukazawa Yugo、Matsui Ko
    • Journal Title

      Nature Neuroscience

      Volume: 25 Issue: 11 Pages: 1458-1469

    • DOI

      10.1038/s41593-022-01184-5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dorsal telencephalon-specific Nprl2- and Nprl3-knockout mice: novel mouse models for GATORopathy2021

    • Author(s)
      Ishida Saeko、Zhao Di、Sawada Yuta、Hiraoka Yuichi、Mashimo Tomoji、Tanaka Kohichi
    • Journal Title

      Human Molecular Genetics

      Volume: - Issue: 9 Pages: 1519-1530

    • DOI

      10.1093/hmg/ddab337

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2021-07-13   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi