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Clarification of the pathogenesis of childhood nephrotic syndrome using iPS cell-derived kidney organoids

Research Project

Project/Area Number 20H03698
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53040:Nephrology-related
Research InstitutionKobe University

Principal Investigator

Iijima Kazumoto  神戸大学, 医学研究科, 客員教授 (00240854)

Co-Investigator(Kenkyū-buntansha) 堀之内 智子  神戸大学, 医学研究科, 助教 (30754593)
高里 実  国立研究開発法人理化学研究所, 生命機能科学研究センター, チームリーダー (40788676)
野津 寛大  神戸大学, 医学研究科, 教授 (70362796)
長野 智那  神戸大学, 医学研究科, 医学研究員 (60814316)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Keywords小児ネフローゼ症候群 / iPS細胞 / 腎臓オルガノイド
Outline of Research at the Start

本研究では、小児NS患者由来のiPS細胞を分化誘導し作成した腎臓オルガノイドを用いて、NPHS1のsynonymous variantがNSの発症に関与するメカニズムを解明することを目的とする。本研究は、小児NSの発症機序の解明、新規治療法や個別化医療の開発に繋がる極めて先進的・独創的な研究であり、本疾患に苦しむ世界中の子供たちの福音となる非常に重要な研究である。

Outline of Final Research Achievements

From 11 Japanese pediatric patients with nephrotic syndrome, we generated iPS cells with null (n = 5), hetero (n = 4) or homo (n = 2) risk haplotypes of the gene NPHS1 that encodes Nephrin, the most important slit-membrane major component protein as a urinary protein prevention mechanism. They also succeeded in producing kidney organoids from some of the iPS cells. In the future, all iPS cells will be induced to differentiate into kidney organoids or renal glomerular podocytes to clarify the relationship between NPHS1 risk haplotype and NPHS1 gene expression.

Academic Significance and Societal Importance of the Research Achievements

我々は、日本人小児ネフローゼ症候群(NS)患者のゲノムワイド関連解析を行い、Nephrinをコードする遺伝子NPHS1のvariantがNSの発症に関連する可能性を世界で初めて見出したが、NPHS1 variantがNPHS1 mRNA発現を制御する機序として、Allele-specific expression(ASE)の可能性が高いと考えられた。
今後、小児NS患者由来のiPS細胞から腎臓オルガノイドを分化誘導し、ASEが生じているかを確認することで、NSの発症機序の解明に繋がることが期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 4 results)

  • [Journal Article] A multicenter retrospective study of calcineurin inhibitors in nephrotic syndrome secondary to podocyte gene variants2023

    • Author(s)
      Malakasioti G, Iancu D, Milovanova A, Tsygin A, Horinouchi T, Nagano C, Nozu K, Kamei K, Fujinaga S, Iijima K, et al. ; CNI in Monogenic SRNS Study Investigators
    • Journal Title

      Kidney International

      Volume: 103 Issue: 5 Pages: 962-972

    • DOI

      10.1016/j.kint.2023.02.022

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Is influenza vaccination associated with nephrotic syndrome relapse in children? A multicenter prospective study2022

    • Author(s)
      Ishimori S, Horinouchi T, Fujimura J, Yamamura T, Matsunoshita N, Kamiyoshi N, Sato M, Ogura M, Kamei K, Ishikura K, Iijima K, Nozu K
    • Journal Title

      Pediatric Nephrology

      Volume: Nov 30 Issue: 7 Pages: 2107-2116

    • DOI

      10.1007/s00467-022-05783-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Clinical, Pathological, and Genetic Characteristics in Patients with Focal Segmental Glomerulosclerosis2022

    • Author(s)
      Nagano C, Hara S, Yoshikawa N, Takeda A, Gotoh Y, Hamada R, Matsuoka K, Yamamoto M, Fujinaga S, Sakuraya K, Kamei K, Hamasaki Y, Oguchi H, Araki Y, Ogawa Y, Okamoto T, Ito S, Tanaka S, Kaito H, Aoto Y, Ishiko S, Rossanti R, Sakakibara N, Horinouchi T, Yamamura T, Nagase H, Iijima K, Nozu K
    • Journal Title

      Kidney360

      Volume: 3 Issue: 8 Pages: 1384-1393

    • DOI

      10.34067/kid.0000812022

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An updated view of the pathogenesis of steroid-sensitive nephrotic syndrome2022

    • Author(s)
      Horinouchi Tomoko、Nozu Kandai、Iijima Kazumoto
    • Journal Title

      Pediatric Nephrology

      Volume: - Issue: 9 Pages: 1957-1965

    • DOI

      10.1007/s00467-021-05401-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Common risk variants in NPHS1 and TNFSF15 are associated with childhood steroid-sensitive nephrotic syndrome2020

    • Author(s)
      Jia Xiaoyuan、Yamamura Tomohiko、et al.
    • Journal Title

      Kidney International

      Volume: 98 Issue: 5 Pages: 1308-1322

    • DOI

      10.1016/j.kint.2020.05.029

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] State of the art nephrotic syndrome: Insights into pathogenesis and treatment2022

    • Author(s)
      Kazumoto Iijima
    • Organizer
      54th Annual Scientific Meeting of the European Society for Pediatric Nephrology
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MMF after rituximab for complicated FRNS/SDNS2022

    • Author(s)
      Kazumoto Iijima
    • Organizer
      19th Congress of the International Pediatric Nephrology Association
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] エビデンスに基づいた小児ネフローゼ症候群の治療2021

    • Author(s)
      飯島一誠
    • Organizer
      第42回日本小児腎不全学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 小児ネフローゼ症候群の病因探索研究および治療開発研究 UP TO Date2021

    • Author(s)
      飯島一誠、野津寛大、佐古まゆみ
    • Organizer
      第55回日本小児腎臓病学会学術集会
    • Related Report
      2020 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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