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Extracellular diacyl phospholipids

Research Project

Project/Area Number 19K22508
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 InstitutionTokyo Medical and Dental University

Principal Investigator

Sasaki Takehiko  東京医科歯科大学, 難治疾患研究所, 教授 (50333365)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsリン脂質 / リン脂質シグナリング / 生理活性脂質
Outline of Research at the Start

申請者は最近、独自に開発したPIP3測定法によって、これまで細胞形質膜の内層に限局すると考えられていたPIP3が、血液中や細胞培養上清など細胞外にも存在することを発見した。多くのがん細胞では、PIP3の生成亢進や分解抑制が起きており、細胞膜に蓄積したPIP3は細胞内シグナル伝達因子として機能している。そのような細胞から分泌されたPIP3の細胞外機能について解明したい。

Outline of Final Research Achievements

Structure-activity relationship of macrophage activation by extracellular PIP3 was clarified using cytokine production as an indicator. The findings suggested the existence of specific receptors.
We found that extracellular PIP3 induced cytoskeletal reorganization in various cancer cell lines. About 50 cultured cell lines were examined, but only some of them were sensitive. Gene expression in 30 breast cancer cell lines was analyzed by RNA seq, and membrane proteins that correlated with PIP3 sensitivity were narrowed down to candidate receptor proteins.
We conducted receptor screening based on the working hypothesis that the PIP3 receptor belongs to the GTP-binding protein-coupled receptor family.

Academic Significance and Societal Importance of the Research Achievements

PIP3が新しいホルモン/オータコイドであれば、現在の膜構成因子としてのドグマでは目が向けられていない、PIP3の新規の生理活性とその発現機構が明らかになるなど、これまで見逃されていた生体調節機構の発見につながる可能性があることから、本研究は細胞膜脂質研究をはじめ生命科学の様々な研究分野の体系や考え方の方向を大きく転換する潜在性を有すると考えている。

Report

(2 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2019 Other

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (3 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Increased fatty acyl saturation of phosphatidylinositol phosphates in prostate cancer progression2019

    • Author(s)
      Koizumi Atsushi、Narita Shintaro、Nakanishi Hiroki、Ishikawa Masaki、Eguchi Satoshi、Kimura Hirotaka、Takasuga Shunsuke、Huang Mingguo、Inoue Takamitsu、Sasaki Junko、Yoshioka Toshiaki、Habuchi Tomonori、Sasaki Takehiko
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 13257-13257

    • DOI

      10.1038/s41598-019-49744-3

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Polarized PtdIns(4,5)P2distribution mediated by a voltage-sensing phosphatase (VSP) regulates sperm motility2019

    • Author(s)
      Kawai Takafumi、Miyata Haruhiko、Nakanishi Hiroki、Sakata Souhei、Morioka Shin、Sasaki Junko、Watanabe Masahiko、Sakimura Kenji、Fujimoto Toyoshi、Sasaki Takehiko、Ikawa Masahito、Okamura Yasushi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 116 Issue: 51 Pages: 26020-26028

    • DOI

      10.1073/pnas.1916867116

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Peptide Derived from Phosphoinositide 3-kinase Inhibits Endocytosis and Influenza Virus Infection2019

    • Author(s)
      Fujioka Y, Satoh AO, Horiuchi K, Fujioka M, Tsutsumi K, Sasaki J, Nepal P, Kashiwagi S, Paudel S, Nishide S, Nanbo A, Sasaki T, Ohba Y
    • Journal Title

      Cell Structure and Function

      Volume: 44 Issue: 1 Pages: 61-74

    • DOI

      10.1247/csf.19001

    • NAID

      130007636814

    • ISSN
      0386-7196, 1347-3700
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Negative Feedback Loop Regulates Integrin Inactivation and Promotes Neutrophil Recruitment to Inflammatory Sites2019

    • Author(s)
      McCormick Barry, Craig Helen E., Chu Julia Y., Carlin Leo M., Canel Marta, Wollweber Florian, Toivakka Matilda, Michael Melina, Astier Anne L., Norton Laura, Lilja Johanna, Felton Jennifer M., Sasaki Takehiko, Ivaska Johanna, Hers Ingeborg, Dransfield Ian, Rossi Adriano G., Vermeren Sonja
    • Journal Title

      JOURNAL OF IMMUNOLOGY

      Volume: 203 Issue: 6 Pages: 1579-1588

    • DOI

      10.4049/jimmunol.1900443

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hippo pathway controls cell adhesion and context-dependent cell competition to influence skin engraftment efficiency2019

    • Author(s)
      Nishio Miki、Miyachi Yousuke、Otani Junji、Tane Shoji、Omori Hirofumi、Ueda Fumihito、Togashi Hideru、Sasaki Takehiko、Mak Tak Wah、Nakao Kazuwa、Fujita Yasuyuki、Nishina Hiroshi、Maehama Tomohiko、Suzuki Akira
    • Journal Title

      The FASEB Journal

      Volume: 33 Issue: 4 Pages: 5548-5560

    • DOI

      10.1096/fj.201802005r

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lysophosphatidylinositol‐acyltransferase‐1 is involved in cytosolic Ca2+ oscillations in macrophages2019

    • Author(s)
      Takemasu Shinya、Ito Masaki、Morioka Shin、Nigorikawa Kiyomi、Kofuji Satoshi、Takasuga Shunsuke、Eguchi Satoshi、Nakanishi Hiroki、Matsuoka Isao、Sasaki Junko、Sasaki Takehiko、Hazeki Kaoru
    • Journal Title

      Genes to Cells

      Volume: - Issue: 5 Pages: 1-11

    • DOI

      10.1111/gtc.12681

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Lipoquality of phosphoinositides2019

    • Author(s)
      Takehiko Sasaki, Eiji Yamamoto, Toshiyoshi Yamamoto, Junko Sasaki
    • Organizer
      2nd International Conference on LipoQualit
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Molecular dissection of phosphoinositides2019

    • Author(s)
      Junko Sasaki, Eiji Yamamoto, Toshiyoshi Yamamoto, Takehiko Sasaki
    • Organizer
      The 14th International Symposium of the Institute Network for Biomedical Sciences 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Phosphoinositide Fingerprinting in Cancer2019

    • Author(s)
      Takehiko Sasaki, Eiji Yamamoto, Toshiyoshi Yamamoto, Junko Sasaki
    • Organizer
      TOHOKU FORUM for CREATIVITY Thematic Program Cancer from Biology to Acceptance International Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 脂質解析ハンドブック2019

    • Author(s)
      新井 洋由、清水 孝雄、横山 信治
    • Total Pages
      310
    • Publisher
      羊土社
    • Related Report
      2019 Research-status Report
  • [Remarks] 東京医科歯科大学 難治疾患研究所病態生理化学分野/医歯学総合研究科脂質生物学分野

    • URL

      https://sites.google.com/view/byoutaiseirikagaku-university/home?authuser=1

    • Related Report
      2019 Research-status Report

URL: 

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

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