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The mechanism of microstructural damage of the proximal tubule of the kidney caused by oxidative stress

Research Project

Project/Area Number 21H02355
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 42020:Veterinary medical science-related
Research InstitutionThe University of Tokyo

Principal Investigator

Yonezawa Tomohiro  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (10433715)

Co-Investigator(Kenkyū-buntansha) 柏原 直樹  川崎医科大学, 医学部, 教授 (10233701)
桃井 康行  東京大学, 大学院農学生命科学研究科(農学部), 教授 (40303515)
中島 修  山形大学, 医学部, 教授 (80312841)
前田 真吾  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (80755546)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Keywords慢性腎臓病 / 酸化ストレス / 猫 / 病態生理 / 抗酸化物質 / 腎臓病
Outline of Research at the Start

腎臓病は、獣医療でもヒト医療でも罹患率や致死率の高い治療困難な疾患である。これまでに応募者は、抗酸化物質 5-アミノレブリン酸の合成酵素であるALAS1のヘテロ欠損マウスが、腎臓近位尿細管上皮細胞のミトコンドリアに特徴的な障害をもつことを明らかにした。本研究では、尿細管上皮細胞株の3D培養系、上記のモデルマウス、およびネコ臨床症例を用いて、獣医療・ヒト医療に役立つ新しい腎臓病予防/治療薬の確立を目指す。

Outline of Final Research Achievements

Cats have a high incidence of chronic kidney disease (CKD). In this study, we aimed to clarify the relationship between the progression of chronic kidney disease and oxidative stress, and to evaluate the possibility of therapeutic intervention with 5-aminolevulinic acid (5-ALA). Feline renal epithelial cells, ALAS1 (+/-) mice, healthy experimental cats, and clinical patients with chronic kidney disease were used. The results suggest that oxidative stress could cause mitochondrial damage mainly in the renal proximal tubules, that some definitive oxidative stress markers increase in the CKD cats, and that administration of 5-ALA could alleviates the oxidative damage. These findings should be useful for understanding and treating chronic kidney disease not only in cats but also in humans.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、猫の慢性腎臓病の進行過程において酸化障害が糸球体の基底膜の構造や近位尿細管のミトコンドリア機能を犯すことを示した点でが学術的意義がある。また、抗酸化物質の一つである5-ALAを合成する代謝酵素の不全が腎臓病を増悪し、5-ALAを経口投薬することによってこれを改善しうることを示したことは、治療法の開発に直結する点で社会的な意義がある。さらに、猫を用いた安全性試験および症例を用いた臨床試験を実施したことにより、これらの成果の社会的な意義の高さが裏打ちされている。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (13 results)

All 2024 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (6 results) (of which Invited: 2 results)

  • [Journal Article] Effect of diazoxide on a cat with insulinoma2024

    • Author(s)
      Sato Shiori、Hori Koji、Tanabe Gaku、Maeda Shingo、Momoi Yasuyuki、Yonezawa Tomohiro
    • Journal Title

      Journal of Feline Medicine and Surgery Open Reports

      Volume: 10 Issue: 1 Pages: 1-5

    • DOI

      10.1177/20551169231220290

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 8-Hydroxy-2′-deoxyguanosine and malondialdehyde in plasma and their association with disease severity in 20 cats with chronic kidney disease2023

    • Author(s)
      Nishi Reo、Harada Airi、Hori Koji、Maeda Shingo、Momoi Yasuyuki、Yonezawa Tomohiro
    • Journal Title

      Journal of Feline Medicine and Surgery

      Volume: 25 Issue: 6 Pages: 942-947

    • DOI

      10.1177/1098612x231173519

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rapid visualization of mammary gland tumor lesions of dogs using the enzyme-activated fluorogenic probe; γ-glutamyl hydroxymethyl rhodamine green2022

    • Author(s)
      HIROSE Yui、UCHIDA Mona、TSUBOI Masaya、NAKAGAWA Takayuki、YAGA Leo、MAEDA Shingo、MOMOI Yasuyuki、KURIKI Yugo、KAMIYA Mako、URANO Yasuteru、YONEZAWA Tomohiro
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 84 Issue: 4 Pages: 593-599

    • DOI

      10.1292/jvms.22-0003

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adverse effect of repeated treatment with 5-aminoleveuic acid in healthy cats and those with chronic kidney disease2022

    • Author(s)
      Nishi R, Uchida M, Nakahara M, Maeda S, Hayashi A, Iwatani N, Tanaka T, Yonezawa T
    • Journal Title

      ALA-Porphyrin Science

      Volume: 11(1) Pages: 1-12

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The urinary lipid profile in cats with idiopathic cystitis2022

    • Author(s)
      TAKENOUCHI Shinya、KOBAYASHI Yui、SHINOZAKI Tatsuya、KOBAYASHI Koji、NAKAMURA Tatsuro、YONEZAWA Tomohiro、MURATA Takahisa
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 84 Issue: 5 Pages: 689-693

    • DOI

      10.1292/jvms.22-0049

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of Canine Urothelial Carcinoma Cells in Urine Using 5-Aminolevulinic Acid2022

    • Author(s)
      Kaji Kenjiro、Yonezawa Tomohiro、Momoi Yasuyuki、Maeda Shingo
    • Journal Title

      Animals

      Volume: 12 Issue: 4 Pages: 485-485

    • DOI

      10.3390/ani12040485

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The profile of urinary lipid metabolites in cats with bacterial cystitis2021

    • Author(s)
      KOBAYASHI Yui、NAKAMURA Tatsuro、YONEZAWA Tomohiro、KOBAYASHI Koji、MURATA Takahisa
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 83 Issue: 12 Pages: 1977-1981

    • DOI

      10.1292/jvms.21-0433

    • NAID

      130008132281

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] 持続的な低血糖の管理にジアゾキシドを用いたインスリノーマ疑いの猫の1例2023

    • Author(s)
      佐藤志織, 田辺岳, 前田真吾, 桃井康行, 米澤智洋
    • Organizer
      第19回日本獣医内科学アカデミー学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 不完全型重複腎盂尿管と診断された猫の一例2023

    • Author(s)
      今尾賢人, 山本貴恵, 中川泰輔, 川口悠爾, 橋本裕子, 茂木朋貴, 前田真吾, 米澤 智洋
    • Organizer
      第15回 獣医腎泌尿器学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 慢性腎臓病の猫の尿中および血漿中8-ヒドロキシ-2’-デオキシグアノシン濃度2023

    • Author(s)
      堀甲二, 西玲央, 原田愛理, 前田真吾, 桃井康行, 米澤智洋
    • Organizer
      日本獣医臨床病理学会2022年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ネコの膀胱炎バイオマーカー2023

    • Author(s)
      米澤智洋
    • Organizer
      第 41回 日本獣医師会獣医学術学会年次大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 排尿障害の診断アプローチと内科治療2023

    • Author(s)
      米澤智洋
    • Organizer
      第20回日本獣医内科学アカデミー学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] IRIS CKDガイドライン2023をもとに考える腎臓病の食事管理2023

    • Author(s)
      米澤智洋
    • Organizer
      日本臨床獣医学フォーラム第4回名古屋地区大会
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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