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Physiological function of Arf6 in melanocytes

Research Project

Project/Area Number 19K06653
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Ohbayashi Norihiko  筑波大学, 医学医療系, 准教授 (40421979)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords小胞輸送 / 色素細胞 / メラニン / 低分子量Gタンパク質 / 樹状突起 / Arf6
Outline of Research at the Start

メラニンを産生することで知られる色素細胞は、その突起を伸長させることで隣接するケラチノサイトや毛母細胞にメラニンを受け渡し、皮膚や毛髪を暗色化する。本研究は、小胞輸送調節などに関わる低分子量Gタンパク質Arf6に着目し、色素細胞におけるArf6の生理機能を細胞レベル・個体レベルで解析することで、未だ理解が進んでいない色素細胞の突起形成過程の解明を目指している。

Outline of Final Research Achievements

FSK and IBMX inhibited the extension of dendritic growth in Arf6-KD melanocytes, implying that cAMP-regulated signals are necessary for Arf6-induced melanocytic dendrite formation. We investigated the capacity of several Rab proteins to bind to Arf6-GAPs in vitro and discovered numerous new Rab binding with Arf6-GAPs. The overexpression of ACAP1, expressed in melanocytes, promoted dendritic elongation irrespective of IBMX therapy in melanocytes, which shows that ACAP1 regulates Arf6 activation downstream of the melanocytic activation of the intracellular signaling pathway.

Academic Significance and Societal Importance of the Research Achievements

色素細胞におけるメラノソーム形成や輸送過程には、多くのRab低分子量Gタンパク質の重要性が報告されてきている。しかしながら、Rabと共に小胞輸送を調節するArf低分子量Gタンパク質の色素細胞での生理機能については、いまだ不明な点が多い。本研究成果は、Arfの中でもArf6およびArf6-GAPであるACAP1がcAMP依存的に色素細胞の樹状突起伸長に関与することを突き止めたもので、「RabとACAP1の新たな相互作用と色素細胞樹状突起伸長機構の詳細」を今後明らかにすることが、色素細胞活性化の総合的理解やシミそばかす予防への新たな対応策構築へとつながる可能性を秘めている。

Report

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

    (9 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (4 results) (of which Invited: 1 results)

  • [Journal Article] Unveiling the interaction between the molecular motor Myosin Vc and the small GTPase Rab3A.2020

    • Author(s)
      Dolce, L. G., Ohbayashi, N., da Silva, D. F. C., Ferrari, A. J. R., Pirolla, R. A. S., Schwarzer, A. C. de A. P., Zanphorlin, L. M., Cabral, L., Fioramonte, M., Ramos, C. H. I., Gozzo, F. C., Fukuda, M., de Giuseppe P. O. and Murakami, M. T.
    • Journal Title

      J. Proteomics

      Volume: 212 Pages: 103549-103549

    • DOI

      10.1016/j.jprot.2019.103549

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] TBC1D24 regulates recycling of clathrin-independent cargo proteins mediated by tubular recycling endosomes2020

    • Author(s)
      Kim Nguyen NT, Ohbayashi N, Kanaho Y, Funakoshi Y.
    • Journal Title

      Biochem Biophys Res Commun

      Volume: 528 Issue: 1 Pages: 220-226

    • DOI

      10.1016/j.bbrc.2020.05.007

    • NAID

      120007132607

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Recent advances in understanding the molecular basis of melanogenesis in melanocytes2020

    • Author(s)
      Ohbayashi Norihiko、Fukuda Mitsunori
    • Journal Title

      F1000Research

      Volume: 9 Pages: 608-608

    • DOI

      10.12688/f1000research.24625.1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unveiling the interaction between the molecular motor Myosin Vc and the small GTPase Rab3A.2020

    • Author(s)
      Dolce LG, Ohbayashi N, Silva DFCD, Ferrari AJR, Pirolla RAS, Schwarzer ACAP, Zanphorlin LM, Cabral L, Fioramonte M, Ramos CHI, Gozzo FC, Fukuda M, Giuseppe PO, Murakami MT.
    • Journal Title

      J Proteomics.

      Volume: 212 Pages: 103549-103549

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cytoplasmic control of Rab family small GTPases through BAG62019

    • Author(s)
      Takahashi Toshiki、Minami Setsuya、Tsuchiya Yugo、Tajima Kazu、Sakai Natsumi、Suga Kei、Hisanaga Shin‐ichi、Ohbayashi Norihiko、Fukuda Mitsunori、Kawahara Hiroyuki
    • Journal Title

      EMBO reports

      Volume: 20 Issue: 4

    • DOI

      10.15252/embr.201846794

    • NAID

      120007127921

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] BAG6によるメラニン合成酵素輸送因子Rab32/38の新規制御機構2021

    • Author(s)
      大林典彦、田島佳寿,高橋俊樹,福田光則,川原裕之
    • Organizer
      第30回日本色素細胞学会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 小胞輸送が司るメラノソーム形成機構2019

    • Author(s)
      大林典彦
    • Organizer
      第29回日本色素細胞学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Ubiquitin-specific protease TRE17/USP6 promotes cancer cell invasion through the regulation of CD147 recycling.2019

    • Author(s)
      Kanaho Yasunori; 船越祐司; Nguyen Nguyen Thi Kim; 大林典彦
    • Organizer
      第42回分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 脱ユビキチン化酵素TRE17/USP6は、膜蛋白質の輸送を介して癌細胞浸潤能を亢進する.2019

    • Author(s)
      Kanaho Yasunori; 船越祐司; 小倉由希乃; 大林典彦
    • Organizer
      第42回分子生物学会年会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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