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Functional analysis of Alfy, a selective autophagy related molecule involved in brain formation

Research Project

Project/Area Number 18K15043
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionJuntendo University (2019)
Niigata University (2018)

Principal Investigator

Kageyama Shun  順天堂大学, 医学部, 助教 (30624225)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsオートファジー / Alfy / 小胞輸送経路 / 自閉症スペクトラム症 / 神経突起 / Rab / メンブレントラフィック / 選択的オートファジー / GABARAP / アダプタータンパク質 / 小胞輸送
Outline of Final Research Achievements

Impairment of selective autophagy that selectively degrades target molecules in lysosomes may contribute to disease development. However, its molecular mechanism is still largely unknown. In this study, we focused on Alfy, which is one of the selective autophagy-related protein and identified as the causative gene of autism spectrum disease, and analyzed its cellular function and physiological function. As a result, it was revealed that Alfy is not essential for autophagy and is involved in neurite formation by controlling the vesicle transport pathway. Furthermore, we found that the nerve-specific Alfy-deficient brain showed hypoplasia. These results imply that Alfy is involved in fetal brain formation.

Academic Significance and Societal Importance of the Research Achievements

選択的オートファジーの破綻に起因する疾患発症の分子病態を明らかにすることは、新規治療法の開発の上で必要不可欠である。本課題の研究対象であるAlfyは、近年、自閉症スペクトラム症の原因遺伝子として同定されたが、疾患発症とオートファジーとの関連は明らかにされていない。本課題では、Alfyが小胞輸送経路への関わりから、神経突起形成ならびに胎生期の脳形成に関連することを明らかにした。本研究により得られた結果は、Alfyの機能の全貌を明らかにするための基礎的知見となり、今後の病態発症機序の解明に役立つと期待される。

Report

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

    (5 results)

All 2020 2019 2018

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

  • [Journal Article] NBR1‐mediated p62‐liquid droplets enhance the Keap1‐Nrf2 system2020

    • Author(s)
      Sanchez-Martin Pablo、Komatsu Masaaki
    • Journal Title

      EMBO reports

      Volume: 21 Issue: 3

    • DOI

      10.15252/embr.201948902

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hyperosmotic Stress Induces Unconventional Autophagy Independent of the Ulk1 Complex2019

    • Author(s)
      Tamura Naoki、Kageyama Shun、Komatsu Masaaki、Waguri Satoshi
    • Journal Title

      Molecular and Cellular Biology

      Volume: 39 Issue: 16

    • DOI

      10.1128/mcb.00024-19

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deletion of exons encoding carboxypeptidase domain of Nna1 results in Purkinje cell degeneration (pcd) phenotype2018

    • Author(s)
      Zhou Li、Hossain M. Ibrahim、Yamazaki Maya、Abe Manabu、Natsume Rie、Konno Kohtaro、Kageyama Shun、Komatsu Masaaki、Watanabe Masahiko、Sakimura Kenji、Takebayashi Hirohide
    • Journal Title

      Journal of Neurochemistry

      Volume: 147 Issue: 4 Pages: 557-572

    • DOI

      10.1111/jnc.14591

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] p62/SQSTM1液滴のオートファジー2019

    • Author(s)
      蔭山俊、Sigurdur Gudmundsson、一村義信、野田展生、和栗聡、Eeva-Liisa Eskelinen、小松雅明
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Nbr1 modulates the activation of the p62-Keap1-Nrf2 pathway during oxidative stress2019

    • Author(s)
      蔭山俊、Sanchez‐Martin Pablo、小松雅明
    • Organizer
      第12回オートファジー研究会 第1回新学術領域研究「マルチモードオートファジー」班会議
    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2021-02-19  

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