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Study to clarify the pathophysiology of childhood nephrotic syndrome and HLA class II

Research Project

Project/Area Number 20K16892
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionKobe University

Principal Investigator

Horinouchi Tomoko  神戸大学, 医学研究科, 助教 (30754593)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords小児ネフローゼ症候群 / ステロイド感受性ネフローゼ症候群 / 自己抗体 / HLA class II / ネフリン / NPHS1 / 小児特発性ネフローゼ症候群 / HLA
Outline of Research at the Start

小児特発性ネフローゼ症候群(INS)は、最も発症頻度の高い小児慢性腎疾患であり、病態解明とそれに基づいた根本療法の開発が急務である。申請者らは小児SSNSを対象としたゲノムワイド関連解析(GWAS)においてHLA class II risk/protective alleleの存在と、腎糸球体スリット膜の重要構成因子であるネフリンをコードするNPHS1が疾患感受性遺伝子であることを明らかとした。本研究では、HLA class II alleleがネフリンを提示する細胞・マウスの各実験系を用いて小児SSNSの病態を解明し、根本治療開発の足掛かりとする。

Outline of Final Research Achievements

Many patients with childhood idiopathic nephrotic syndrome are steroid-sensitive (SSNS). Several genome-wide association studies have shown that HLA class II, which is related to immunity, and NPHS1, which encodes nephrin in glomeruli, are involved in pediatric SSNS. HLA class II genes are associated with susceptibility to many kinds of autoimmune diseases, one of the mechanisms being misfolded protein/HLA class II complexes, which is aberrantly transported to the cell surface in the affected tissues inducing immune responses. In this study, we investigated the relationship between each HLA allele and nephrin based on the hypothesis that nephrin protein/HLA class II complexes might be involved in the development of SSNS. We also searched for autoantibodies that respond to the nephrin complex (neo-self).

Academic Significance and Societal Importance of the Research Achievements

小児ネフローゼ症候群において、日本人や欧米人において報告されているHLA class IIのRisk alleleによりコードされるHLA-DR分子はProtective alleleによりコードされるHLA-DR分子に比較し、ネフリンを抗原として呈示しやすい傾向があることが明らかになった。また、ネフリンやHLA class IIの複合体に対する自己抗体が存在する可能性が明らかになった。

Report

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

    (15 results)

All 2023 2022 2021 2020

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (2 results) Funded Workshop (1 results)

  • [Journal Article] Steroid resistant nephrotic syndrome with collapsing focal segmental glomerulosclerosis in a 12-year-old Japanese female after SARS-CoV-2 vaccination2023

    • Author(s)
      Horinouchi Tomoko、Ueda Chika、Kitakado Hideaki、Yoshikawa Norishige、Nozu Kandai
    • Journal Title

      Journal of Nephrology

      Volume: online ahead of print Issue: 5 Pages: 1-4

    • DOI

      10.1007/s40620-023-01577-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [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
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cite Share Detecting MUC1 Variants in Patients Clinicopathologically Diagnosed With Having Autosomal Dominant Tubulointerstitial Kidney Disease2022

    • Author(s)
      Okada E, Morisada N, Horinouchi T, Fujii H, Tsuji T, Miura M, Katori H, Kitagawa M, Morozumi K, Toriyama T, Nakamura Y, Nishikomori R, Nagai S, Kondo A, Aoto Y, Ishiko S, Rossanti R, Sakakibara N, Nagano C, Yamamura T, Ishimori S, Usui J, Yamagata K, Iijima K, Imasawa T, Nozu K.
    • Journal Title

      Kidney Int Rep.

      Volume: 7 Issue: 4 Pages: 857-866

    • DOI

      10.1016/j.ekir.2021.12.037

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clear Evidence of <i>LAMA5</i> Gene Biallelic Truncating Variants Causing Infantile Nephrotic Syndrome2021

    • Author(s)
      Taniguchi Yukimasa、Nagano China、Sekiguchi Kiyotoshi、Tashiro Atsushi、Sugawara Noriko、Sakaguchi Haruhide、Umeda Chisato、Aoto Yuya、Ishiko Shinya、Rossanti Rini、Sakakibara Nana、Horinouchi Tomoko、Yamamura Tomohiko、Kondo Atsushi、Nagai Sadayuki、Nagase Hiroaki、Iijima Kazumoto、Miner Jeffrey H.、Nozu Kandai
    • Journal Title

      Kidney360

      Volume: 2 Issue: 12 Pages: 1968-1978

    • DOI

      10.34067/kid.0004952021

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Glomerular galactose-deficient IgA1 expression analysis in pediatric patients with glomerular diseases2020

    • Author(s)
      Ishiko Shinya、Horinouchi Tomoko、Fujimaru Rika、Shima Yuko et al.
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1

    • DOI

      10.1038/s41598-020-71101-y

    • NAID

      120006954852

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Twelve-year-old girl with steroid resistant nephrotic syndrome with collapsing focal segmental glomerulosclerosis after COVID-19 vaccination2022

    • Author(s)
      Masuda C, Horinouchi T, Kitakado H et al.
    • Organizer
      ASN kidney week 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 15.Treatment with antisense-oligonucleotide or splicing regulating proteins for X-linked Alport syndrome cases with deep intronic variants2021

    • Author(s)
      Horinouchi Tomoko, Yamamura Tomohiko, Nagai Sadayuki, Kondo Atsushi, Aoto Yuya, Okada Eri, Rossanti Rini, Sakakibara Nana, Nagano China, Ninchoji Takeshi, Iijima Kazumoto, Nozu Kandai
    • Organizer
      第64回日本腎臓学会学術総会
    • Related Report
      2021 Research-status Report
  • [Presentation] 16.小児から成人へのシームレスなネフローゼ診療 単一遺伝子異常と小児および成人におけるネフローゼ症候群2021

    • Author(s)
      堀之内 智子, 野津 寛大, 長野 智那, 飯島 一誠
    • Organizer
      第64回日本腎臓学会学術総会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Alport syndrome UP TO DATE 2 Genetics and novel treatment Tomoko2021

    • Author(s)
      HORINOUCHI, Kandai NOZU, Tomohiko YAMAMURA and Kazumoto IIJIMA
    • Organizer
      The 18thJAPAN-KOREA-CHINA Pediatric Nephrology Seminar
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Novel nephrin protein/HLA classII complexes: A new mechanism of steroid sensitive nephrotic syndrome2020

    • Author(s)
      Tomoko Horinouchi, China Nagano, Tomohiko Yamamura, Masako Kohyama, Kandai Nozu, Kazumoto Iijima, Hisashi Arase
    • Organizer
      第55回日本小児腎臓病学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Novel nephrin protein/HLA class II complexes: A new mechanism of steroid sensitive nephrotic syndrome2020

    • Author(s)
      Tomoko Horinouchi, Sadayuki Nagai, Atsushi Kondo, Yuya Aoto, Shinya Ishiko, Rini Rossanti, Nana Sakakibara, China Nagano, Tomohiko Yamamura, Takeshi Ninchoji, Kandai Nozu, Kazumoto Iijima
    • Organizer
      American Society of Nephrology, Kidney week 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Book] 6.【~エキスパートの経験に学ぶ~小児科Decision Making】腎・泌尿器に関する病態 蛋白尿(解説/特集)2021

    • Author(s)
      堀之内 智子, 野津 寛大, 飯島 一誠
    • Total Pages
      3
    • Publisher
      診断と治療社
    • Related Report
      2021 Research-status Report
  • [Book] 3.【腎疾患-エキスパートへの質問で学ぶ診療のキホンと最新情報】遺伝性腎疾患 遺伝学的検査をすべき成人の遺伝性腎疾患について教えてください(解説/特集)2021

    • Author(s)
      堀之内智子, 野津寛大
    • Total Pages
      3
    • Publisher
      医学書院
    • Related Report
      2021 Research-status Report
  • [Funded Workshop] ASN kidney week 20222022

    • Related Report
      2022 Annual Research Report

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

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