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

basolatera

Research Project

Project/Area Number 19K22514
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 48:Biomedical structure and function and related fields
Research InstitutionOsaka University

Principal Investigator

Harada Akihiro  大阪大学, 大学院医学系研究科, 教授 (40251441)

Project Period (FY) 2019-06-28 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords細胞極性 / 脱核 / 上皮細胞 / 赤芽球 / EHBP1L1 / Rab8 / Rab10 / T細胞 / 小腸
Outline of Research at the Start

上皮細胞は極性を持つが、上皮細胞以外の細胞の極性の分子機構は上皮細胞のそれは共通であろうか?そのような「細胞極性の分子機構の細胞種間における普遍性」は想定されてはきたが、根拠が乏しかった。
我々はRab8、EHBP1L1、CD2APの、各組織での量、細胞内局在、ノックアウトマウスの解析から、小腸上皮細胞の極性機構は赤芽球、T細胞、腎臓足細胞の極性形成機構と共通性があるが、腎臓尿細管上皮細胞の極性機構とは異なる可能性を提示する。
我々はここでその共通機構を「Rab8依存性極性機構」と呼び、小腸の上皮細胞など、多種の細胞における極性の形成や維持に普遍的に働くことを実証することを本研究の目的とする。

Outline of Final Research Achievements

From the analysis of Rab8 and Rab8-binding proteins in various tissues, we found that the polarization mechanism of small intestinal epithelial cells has commonalities with those of erythroblasts, T cells, and renal podocytes and different from the one in renal tubules. We showed that the mechanism ``Rab8-dependent polarity mechanism'' works universally in the formation and maintenance of polarity in the above-mentioned cell types such as epithelial cells of the small intestine by the following observatons. 1.Rab8 and 10 are highly expressed in these cells. 2. Rab8 and its binding proteins co-localize to cellular recycling endosomes (RE). 3. Knockdown of these in erythroblasts decreased the enucleation efficiency.
These data were compiled and published in a paper.

Academic Significance and Societal Importance of the Research Achievements

細胞極性の形成維持機構が上皮細胞の極性のみならず、赤芽球や骨格筋の核の極性移動にも関与していることが明らかになったことで、極性には共通の分子機構があることが初めて明らかになった。これは細胞極性の分子機構の共通性を初めて示したことで学術的意義は高い。また、Rab8/10結合タンパク質EHBP1L1のノックアウトマウスやRab10のノックダウンによって赤芽球の脱核効率が低下することからEHBP1L1やRab10が脱核に重要であることが明らかとなった。この研究からEHBP1L1、Rab10のagonistが脱核効率を上げて赤血球産生を促進できる可能性が判明し社会的な意義も大きい。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Invited: 2 results) Remarks (2 results)

  • [Int'l Joint Research] UNPAD(インドネシア)

    • Related Report
      2020 Research-status Report
  • [Journal Article] The Hypothalamic Paraventricular Nucleus Is the Center of the Hypothalamic?Pituitary?Thyroid Axis for Regulating Thyroid Hormone Levels2021

    • Author(s)
      Kondo Yuri、Ozawa Atsushi、Kohno Daisuke、Saito Kazuma、Buyandalai Battsetseg、Yamada Sayaka、Horiguchi Kazuhiko、Nakajima Yasuyo、Shibusawa Nobuyuki、Harada Akihiro、Yokoo Hideaki、Akiyama Hideo、Sasaki Tsutomu、Kitamura Tadahiro、Yamada Masanobu
    • Journal Title

      Thyroid

      Volume: 32 Pages: 105-114

    • DOI

      10.1089/thy.2021.0444

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rab11-mediated post-Golgi transport of the sialyltransferase ST3GAL4 suggests a new mechanism for regulating glycosylation2021

    • Author(s)
      Kitano Masato、Kizuka Yasuhiko、Sobajima Tomoaki、Nakano Miyako、Nakajima Kazuki、Misaki Ryo、Itoyama Saki、Harada Yoichiro、Harada Akihiro、Miyoshi Eiji、Taniguchi Naoyuki
    • Journal Title

      Journal of Biological Chemistry

      Volume: 296 Pages: 100354-100354

    • DOI

      10.1016/j.jbc.2021.100354

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] SNAP23 deficiency causes severe brain dysplasia through the loss of radial glial cell polarity2020

    • Author(s)
      Kunii M、Noguchi Y、Yoshimura S、Kanda S、Iwano T、Avriyanti E、Atik N、Sato T、Sato K、Ogawa M、Harada A
    • Journal Title

      Journal of Cell Biology

      Volume: 220 Issue: 1 Pages: 1-21

    • DOI

      10.1083/jcb.201910080

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Loss of Rab6a in the small intestine causes lipid accumulation and epithelial cell death from lactation2022

    • Author(s)
      原田彰宏
    • Organizer
      日本解剖学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] リサイクルエンドソームと TGN との間のコンタクトサイトを介した、Rab11-RELCH-OSBP 複合体によるコレステ ロール輸送2020

    • Author(s)
      原田彰宏、傍嶋智明、吉村信一郎
    • Organizer
      日本細胞生物学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Roles of Rabs for apical transport, ciliogenesis, and diseases: lessons from knockout mice.2019

    • Author(s)
      Akihiro Harada
    • Organizer
      International seminar at National Taiwan University
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] The molecular mechanism of cell polarity and its impact on clinical research2019

    • Author(s)
      Akihiro Harada
    • Organizer
      International seminar at Konkuk University, Korea
    • Related Report
      2019 Research-status Report
    • Invited
  • [Remarks] 大阪大学大学院 細胞生物学 原田彰宏研究室

    • URL

      https://www.harada-lab.online/

    • Related Report
      2020 Research-status Report
  • [Remarks] 大阪大学大学院 細胞生物学 原田彰宏研究室

    • URL

      https://www.harada-lab.online/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi