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Elucidation of Effects of Oxidized Sterol Accumulation on the Progression of Diabetic Cardiomyopathy

Research Project

Project/Area Number 19K21324
Project/Area Number (Other) 18H06222 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0903:Organ-based internal medicine and related fields
Research InstitutionOsaka University

Principal Investigator

Okada Takeshi  大阪大学, 医学系研究科, 寄附講座助教 (20750136)

Project Period (FY) 2018-08-24 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords糖尿病性心筋症 / 酸化ステロール / ミトコンドリア機能障害 / 心不全
Outline of Research at the Start

糖尿病性心筋症は糖尿病性心不全の前段階と考えられ、心筋肥大と拡張機能不全を特徴とするが、詳細な発症メカニズムは明らかでない。糖尿病では腸管の脂質吸収が亢進していると考えられており、また糖尿病患者では血中の酸化ステロール濃度が増加していることが報告されている。糖尿病性心筋症の増悪因子として酸化ステロールが関与している可能性について、動物モデルを用いて検討し、病態進展における酸化ステロール蓄積の役割を明らかにする。

Outline of Final Research Achievements

The purpose of this study is to investigate the effect of long-term absorption of a small amount of dietary oxidized sterols on myocardial tissue as a mechanism for the development of diabetic cardiomyopathy. We have prepared diets with and without oxidized sterols and fed them to streptozotocin-induced diabetic rats for 16 weeks. The rats fed the diet with oxidized sterols showed lower value of left ventricular strain on cardiac MRI, suggesting regional myocardial dysfunction. Moreover, mRNA expression of inflammatory cytokines was enhanced in the heart, and infiltration of inflammatory cells into myocardial tissue was observed in these rats. We will continue to evaluate the localization of oxidized sterols in myocardial tissue and elucidate the mechanism focusing on immune system cells or mitochondrial function.

Academic Significance and Societal Importance of the Research Achievements

本邦において糖尿病患者数は増加の一途を辿っている。糖尿病の合併により心不全発症リスクは高まるが、その前段階として心筋肥大や拡張機能不全を特徴とする糖尿病性心筋症がある。しかしこれまで、糖尿病性心筋症において何が増悪因子なのか、どの病態を改善すれば進展を阻止できるのか、詳細な分子メカニズムは明らかでない。糖尿病では腸管の脂質吸収が亢進しており、食事由来成分である酸化ステロールが糖尿病性心筋症を進展させる可能性を着想し、動物モデルを用いて再現した。酸化ステロールの新たなエビデンスが集積されることで、酸化ステロールに対する介入という新規治療法の開発につながる可能性がある。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • Research Products

    (9 results)

All 2020 2019

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

  • [Journal Article] Progranulin deficiency leads to enhanced age-related cardiac hypertrophy through complement C1q-induced β-catenin activation.2020

    • Author(s)
      Zhu Y, Ohama T, Kawase R, Chang J, Inui H, Kanno K, Okada T, Masuda D, Koseki M, Nishida M, Sakata Y, Yamashita S.
    • Journal Title

      Journal of Molecular and Cellular Cardiology

      Volume: 138 Pages: 197-211

    • DOI

      10.1016/j.yjmcc.2019.12.009

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rivaroxaban Suppresses the Progression of Ischemic Cardiomyopathy in a Murine Model of Diet-Induced Myocardial Infarction2019

    • Author(s)
      Liu J, Nishida M, Inui H, Chang J, Zhu Y, Kanno K, Matsuda H, Sairyo M, Okada T, Nakaoka H, Ohama T, Masuda D, Koseki M, Yamashita S, Sakata Y.
    • Journal Title

      Journal of Atherosclerosis and Thrombosis

      Volume: 26 Issue: 10 Pages: 915-930

    • DOI

      10.5551/jat.48405

    • NAID

      130007722198

    • ISSN
      1340-3478, 1880-3873
    • Year and Date
      2019-10-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Shotgun proteomic analysis reveals proteome alterations in HDL of patients with cholesteryl ester transfer protein deficiency.2019

    • Author(s)
      Okada T, Ohama T, Takafuji K, Kanno K, Matsuda H, Sairyo M, Zhu Y, Saga A, Kobayashi T, Masuda D, Koseki M, Nishida M, Sakata Y, Yamashita S.
    • Journal Title

      J Clin Lipidol

      Volume: 印刷中 Issue: 2 Pages: 317-325

    • DOI

      10.1016/j.jacl.2019.01.002

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] コレステリルエステル転送蛋白(CETP)欠損症リポ蛋白の動脈硬化惹起性に関する検討2020

    • Author(s)
      岡田健志、大濱透、乾洋勉、冠野昂太郎、小関正博、西田誠、山下静也、坂田泰史
    • Organizer
      第54回日本成人病(生活習慣病)学会学術集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 当科脂質外来における家族性高コレステロール血症診療の現状2020

    • Author(s)
      岡田健志、小関正博、西田誠、冠野昂太郎、乾洋勉、嵯峨礼美、大濱透、山下静也、坂田泰史
    • Organizer
      第54回日本成人病(生活習慣病)学会学術集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development and Clinical Application of an Enzyme-Linked Immunosorbent Assay for Oxidized High Density Lipoprotein2020

    • Author(s)
      Takeshi Okada, Tohru Ohama, Ayami Saga, Hiroyasu Inui, Kotaro Kanno, Masahiro Koseki, Makoto Nishida, Yasushi Sakata, Shizuya Yamashita
    • Organizer
      American College of Cardiology 2020 World Congress of Cardiology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 当科脂質外来における家族性高コレステロール血症診療の現状2019

    • Author(s)
      岡田健志、小関正博、西田誠、冠野昂太郎、乾洋勉、嵯峨礼美、朝治真澄、大濱透、服部浩明、山下静也、坂田泰史
    • Organizer
      第51回日本動脈硬化学会総会・学術集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of an Enzyme-Linked Immunosorbent Assay for Oxidized High Density Lipoprotein and Its Clinical Application for Cardiovascular Risk Assessment2019

    • Author(s)
      Takeshi Okada, Shizuya Yamashita, Tohru Ohama, Hiroyasu Inui, Kotaro Kanno, Masahiro Koseki, Makoto Nishida, Yasushi Sakata
    • Organizer
      第3回日本循環器学会基礎研究フォーラム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Prevalence of Coronary Artery Disease and Achievement of Low-density Lipoprotein Cholesterol Management Targets in Familial Hypercholesterolemia Patients at Osaka University Hospital2019

    • Author(s)
      Takeshi Okada, Masahiro Koseki, Kotaro Kanno, Hiroyasu Inui, Jiuyang Chang, Yinghong Zhu, Ayami Saga, Masumi Asaji, Tohru Ohama, Makoto Nishida, Shizuya Yamashita, Yasushi Sakata
    • Organizer
      第36回国際心臓研究学会日本部会
    • Related Report
      2019 Annual Research Report

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Published: 2018-08-27   Modified: 2024-03-26  

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