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

Elucidation of neuroprotection and neural axon regeneration mechanism by PACAP

Research Project

Project/Area Number 20K09262
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55060:Emergency medicine-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

RAKWAL RANDEEP  筑波大学, 体育系, 教授 (70590850)

Co-Investigator(Kenkyū-buntansha) 柴藤 淳子  湘南医療大学, 臨床医学研究所, 研究員 (10611121)
塩田 清二  湘南医療大学, 薬学部医療薬学科, 教授 (80102375)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
KeywordsPACAP / CRMP2 / PAC1R / トランスクリプトーム解析 / プロテオーム解析 / PAC1受容体 / pacap / 神経保護 / 神経新生
Outline of Research at the Start

本研究ではPACAPによる神経保護と再生メカニズム作用機序において重要な働きをする因子を虚血再灌流In vitroモデルとスクラッチ創傷アッセイでのオミックス解析により網羅的に同定する。PACAPによる軸索回復効果が認められた条件でオミックス解析を行い、バイオインフォマティクス解析ソフトを利用した生物学的機能解析やパスウェイ解析を行うことでPACAPによる神経保護と再生における因子やシグナル経路を明らかにする。さらにショットガンプロテオーム法で得られたデータについては、分化誘導、足場タンパク質、軸索ガイダンスなど軸索伸長作用に関与する因子を中心に検討を進める。

Outline of Final Research Achievements

Although dephosphorylation of CRMP2 by Pac1 receptor-mediated PI3K/AKT and MEK/ERK is important for PACAP-induced projection elongation, details of PACAP-induced projection elongation including CRMP2 dephosphorylation by GSK-3β, CDK5 and Rho/ROCK are unclear. Since CRMP2 dephosphorylation is detected within 3 hours of PACAP addition, we considered it important to identify initial factors involved in CRMP2 dephosphorylation effect by PACAP and performed high-throughput omics analyses. Many important regulators involved in neurite outgrowth, including known ones, were detected, and factors that may be involved in CRMP2 dephosphorylation were identified. Though this research could not confirm exact role and position of CRMP2 in PACAP mediated cell elongation, it appears that its phosphorylation and de-phosphorylation has a correlation with neurite protrusion elongation through interplay of CDK5, which needs further investigation.

Academic Significance and Societal Importance of the Research Achievements

これまでの研究により、CRMP2のリン酸化が軸索誘導や軸索再生に関与していることが明らかにされている。本報告では、PC12細胞をモデルとしたPACAPのCRMP2の脱リン酸化による突起伸長作用の分子機構について明らかにすることを目的としてオミックス解析を行い、突起伸長作用に関与する初期因子を同定することができた。CRMP2の脱リン酸化作用がアルツハイマー病や多発性硬化症など、神経変性疾患の治療標的として注目されている。PACAPによるCRMP2のリン酸化抑制を促進するメカニズムについて新たな知見を得ることで、新規治療法の開発などに貢献できると考えている。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Pusan National University(韓国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] OMICS Analyses Unraveling Related Gene and Protein-Driven Molecular Mechanisms Underlying PACAP 38-Induced Neurite Outgrowth in PC12 Cells2023

    • Author(s)
      Shibato Junko、Takenoya Fumiko、Yamashita Michio、Gupta Ravi、Min Cheol Woo、Kim Sun Tae、Kimura Ai、Takasaki Ichiro、Hori Motohide、Shioda Seiji、Rakwal Randeep
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 24 Issue: 4 Pages: 4169-4169

    • DOI

      10.3390/ijms24044169

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Molecular Mechanism for PACAP 38-Induced Neurite Outgrowth in PC12 Cells2021

    • Author(s)
      Shibato J, Takenoya F, Hirabayashi T, Kimura A, Yamashita M, Takasaki I, Rakwal R, Shioda S.
    • Journal Title

      Neural Plasticity

      Volume: 2021 Pages: 2522454-2522454

    • DOI

      10.1155/2021/2522454

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 神経ペプチドPACAPによるPC12細胞を用いた神経突起伸長作用の分子制御機構について2023

    • Author(s)
      山下 道生、柴藤 淳子、Rakwal Randeep、平林 敬浩、千葉 義彦、髙﨑 一朗、塩田 清二、竹ノ谷 文子
    • Organizer
      日本薬学会第143年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] PC12細胞におけるPACAPの突起伸長の分子制御機構解析2022

    • Author(s)
      山下 道生, 竹ノ谷 文子, 柴藤 淳子, Rakwal Randeep, 平林 敬浩, 千葉 義彦, 塩田 清二
    • Organizer
      第96回日本薬理学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Molecular Mechanisms Underlying PACAP 38 Induced Neurite Outgrowth in PC12 Cells: Towards OMICS2022

    • Author(s)
      Randeep Rakwal
    • Organizer
      VPAC ISBAP 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi