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Analuses of mitochondrial dysfunction depending on the species of pathogenic molecules in Alzheimer's disease

Research Project

Project/Area Number 16K09664
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Neurology
Research InstitutionUniversity of Tsukuba

Principal Investigator

Tamaoka Akira  筑波大学, 医学医療系, 教授 (50192183)

Co-Investigator(Kenkyū-buntansha) 冨所 康志  筑波大学, 医学医療系, 講師 (80447250)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsAlzheimer's disease / mitochondria / amyloid β protein / amyloid precursor / oxidative stress / autophagy / lysosome / transcription factor EB / アルツハイマー病 / アミロイドβ蛋白 / ミトコンドリア / アミロイドβ蛋白前駆体 / オートファジー・リソソーム経路 / 転写因子EB / 酸化ストレス / リソゾーム / アミロイドβ前駆体蛋白 / α-セクレターゼ / β-セクレターゼ / γ-セクレターゼ / BACE1 / APP / アポリポ蛋白E
Outline of Final Research Achievements

We investigated whether Amyloid β-protein (Aβ) is generated locally from amyloid precursor protein (APP) within mitochondria by analyzing the expression patterns of APP and related molecules in mitochondria separated from human neuroblastoma SH-SY5Y cells and those expressing Swedish mutant APP. In view of the particularly low expression levels of BACE1, γ-secretase complex proteins, and β-CTF in mitochondria, we propose that it is unlikely that Aβ generation from APP occurs locally within this organelle. On the other hand, abnormalities of the autophagy-lysosomal pathway (ALP) have been implicated in the pathology of AD. Activation of TFEB (transcription factor EB), a master regulator of the ALP, leads to ALP facilitation. The present study sought to clarify whether TFEB-mediated ALP facilitation influences the process of Aβ generation in neurons, indicating that TFEB-mediated ALP enhancement appears to have dual, but opposite, effects on Aβ production in neurons.

Academic Significance and Societal Importance of the Research Achievements

ADではAβのフリーラジカル化した毒性構造体が増加している事やAβオリゴマーがミトコンドリア障害性に作用する事が示されて来た。本研究では、AD発症における病因関連分子であるAβがAD発症を促進する機序に関して、特にミトコンドリアとの関係を中心に解析した。SH-SY5Y細胞を用いた実験により、APPよりのAβの産生は、ミトコンドリアにおいては生じていないものと考えられた。また、APPの細胞内代謝を解析では、TFEBによるALP促進がAβ分泌量に与える影響は、主にβ-CTFレベルの変化によるものと考えられた。今後は、酸化ストレスやミトコンドリア障害とALPやTFEBとの関係を解析する必要がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017

All Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 5 results,  Acknowledgement Compliant: 2 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] TFEB-mediated Enhancement of the Autophagy-lysosomal Pathway Dually Modulates the Process of Amyloid β-Protein Generation in Neurons.2019

    • Author(s)
      Yamamoto F, Taniguchi K, Mamada N, Tamaoka A, Kametani F, Lakshmana MK, Araki W.
    • Journal Title

      Neuroscience. 2

      Volume: 402 Pages: 11-22

    • DOI

      10.1016/j.neuroscience.2019.01.010

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The neurotoxicity of amyloid β-protein oligomers is reversible in a primary neuron model.2017

    • Author(s)
      Tanokashira D, Mamada N, Yamamoto F, Taniguchi K, Tamaoka A, Lakshmana MK, Araki W
    • Journal Title

      Mol Brain

      Volume: 10 Issue: 1 Pages: 4-4

    • DOI

      10.1186/s13041-016-0284-5

    • NAID

      120007135045

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Mitochondoria are devoid of amyloid beta-protein (Abeta)-producing secretases: Evidence for unlikely occurrence within mitochondria of Abeta generation from amyloid precursor protein.2017

    • Author(s)
      Naomi Mamada, Daisuke Tanokashira, Kazuhiro Ishii, Akira Tamaoka, Wataru Araki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 486 Issue: 2 Pages: 321-328

    • DOI

      10.1016/j.bbrc.2017.03.035

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Chronic treatment with a smart antioxidative nanoparticle for inhibition of amyloid plaque propagation in Tg2576 mouse model of Alzheimer’s disease2017

    • Author(s)
      Boonruamkaew Phetcharat、Chonpathompikunlert Pennapa、Vong Long Binh、Sakaue Sho、Tomidokoro Yasushi、Ishii Kazuhiro、Tamaoka Akira、Nagasaki Yukio
    • Journal Title

      Sci Rep

      Volume: 7 Issue: 1 Pages: 3785-3785

    • DOI

      10.1038/s41598-017-03411-7

    • NAID

      120007128892

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Neuron-specific methylome analysis reveals epigenetic regulation and tau-related dysfunction of BRCA1 in Alzheimer’s disease2017

    • Author(s)
      Mano Tatsuo、Nagata Kenichi、Nonaka Takashi、Tarutani Airi、Imamura Tomohiro、Hashimoto Tadafumi、Bannai Taro、Koshi-Mano Kagari、Tsuchida Takeyuki、Ohtomo Ryo、Takahashi-Fujigasaki Junko、Yamashita Satoshi、Ohyagi Yasumasa、Yamasaki Ryo、Tsuji Shoji、Tamaoka Akira、et al.
    • Journal Title

      Proc Natl Acad Sci U.S.A.

      Volume: 114 Issue: 45

    • DOI

      10.1073/pnas.1707151114

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Enhancement of the autophagy-lysosomal pathway modulates the process of amyloid β-protein generation2018

    • Author(s)
      Wataru Araki, Fumiko Yamamoto, Kaori Taniguchi, Naomi Mamada, Akira Tamaoka, Fuyuki Kametani, Madepalli K Lakshmana
    • Organizer
      18th World Congress of Basic and Clinical Pharmacology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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