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Effects of the platelet CLEC-2 on podocytes of injured glomeruli

Research Project

Project/Area Number 20K17257
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53040:Nephrology-related
Research InstitutionOkayama University (2021-2023)
Tokai University (2020)

Principal Investigator

Tanaka Keiko  岡山大学, 医歯薬学域, 助教 (80794370)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsポドサイト / 血小板 / CLEC-2 / Podoplanin / 慢性腎臓病 / 腎臓
Outline of Research at the Start

Podoplaninは腎糸球体ポドサイトの細胞膜に強く発現するが、その機能は不明である。Podoplaninの内因性結合分子は、血小板に発現するC-type lectin like receptor-2(CLEC-2)である。正常時、ポドサイトは糸球体基底膜により血小板から隔絶されているが、基底膜傷害時に血小板や血漿中の可溶性CLEC-2がポドサイトに作用する事が考えられた。本研究計画では、in vitroおよびin vivoでCLEC-2がPodoplaninを介してポドサイトに与える影響を評価し、CLEC-2の傷害ポドサイトへの効果を明らかにする。

Outline of Final Research Achievements

Podoplanin (PDPN) is strongly expressed on podocyte cell membranes; the endogenous ligand for PDPN is CLEC-2 expressing on platelets. Podocytes are normally sequestered from CLEC-2, but when glomerular barrier is injured, podocytes gain access to CLEC-2. We tested the effect of CLEC-2 on podocytes in vitro and in vivo. Cultured podocytes treated with Fc-CLEC-2 showed that CLEC-2 induced dephosphorylation of ERM proteins. Treated podocytes also showed dissociation of F-actin filaments from PDPN, F-actin degradation, detachment, and round morphology. Normal mouse kidneys were perfused with FLAG-CLEC-2. CLEC-2 induced dephosphorylation of ERM and widening of foot processes of podocytes. Platelets were detected by immunostaining for CD41 in the urine of mice with podocyte injury. These findings suggest that when platelets leak from injured glomeruli, platelet-derived CLEC-2 may act on PDPNs on podocytes, causing morphological changes and detachment, further exacerbating podocyte injury.

Academic Significance and Societal Importance of the Research Achievements

本研究は、古くから知られていたポドサイトタンパク質Podoplaninの知られざる新たな機能を解明し、ポドサイトが糸球体濾過バリア破綻を伝えるCLEC-2のセンサーを備えているという事を明らかにした。このことは今後ポドサイト保全の新しい治療ターゲットにつながる可能性がある。また今まで顧みられなかった尿中血小板に、蛋白尿や血尿とは異なる新たな診断的価値を与える可能性がある。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021

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

  • [Journal Article] Serum sCD40L and IL-31 in Association with Early Phase of IgA Nephropathy2023

    • Author(s)
      Keiko Tanaka, Hitoshi Sugiyama, Hiroshi Morinaga, Masashi Kitagawa, Yuzuki Kano, Yasuhiro Onishi, Koki Mise, Katsuyuki Tanabe, Haruhito A Uchida, Jun Wada
    • Journal Title

      Journal of Clinical Medicine

      Volume: 12 Issue: 5 Pages: 2023-2023

    • DOI

      10.3390/jcm12052023

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elderly Brothers With Fabry Disease Exhibiting Cardiac and Renal Manifestations2023

    • Author(s)
      Tanaka Keiko、Sugiyama Hitoshi、Morinaga Hiroshi、Onishi Akifumi、Kano Yuzuki、Takeuchi Hidemi、Tsuji Kenji、Kubo Motoki、Tanabe Katsuyuki、Uchida Haruhito A.、Nakamura Kazufumi、Wada Jun
    • Journal Title

      Annals of Internal Medicine: Clinical Cases

      Volume: 2 Issue: 5 Pages: 1-6

    • DOI

      10.7326/aimcc.2022.1003

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Podocytes are lost from glomeruli before completing apoptosis2022

    • Author(s)
      Yamamoto Kazuyoshi、Okabe Masahiro、Tanaka Keiko、Yokoo Takashi、Pastan Ira、Araoka Toshikazu、Osafune Kenji、Udagawa Tomohiro、Koizumi Masahiro、Matsusaka Taiji
    • Journal Title

      American Journal of Physiology-Renal Physiology

      Volume: 323 Issue: 5 Pages: F515-F526

    • DOI

      10.1152/ajprenal.00080.2022

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] C-type lectin-like receptor (CLEC)-2, the ligand of podoplanin, induces morphological changes in podocytes2022

    • Author(s)
      Tanaka Keiko、Tanaka Masafumi、Watanabe Nobuo、Ito Masatoshi、Pastan Ira、Koizumi Masahiro、Matsusaka Taiji
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 22356-22356

    • DOI

      10.1038/s41598-022-26456-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] C-type lectin-like receptor (CLEC)-2, the ligand of podoplanin, induced dynamic change of F-actin filaments in podocytes2021

    • Author(s)
      Keiko Tanaka, Taiji Matsusaka
    • Organizer
      ASN Kidney Week 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dach1 is essential for maintaining normal podocytes.2021

    • Author(s)
      Keiko Tanaka, Taiji Matsusaka
    • Organizer
      ASN Kidney Week 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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