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  1. Article

    Open Access

    Phosphatidylinositol-3,4,5-trisphosphate interacts with alpha-synuclein and initiates its aggregation and formation of Parkinson’s disease-related fibril polymorphism

    Lipid interaction with α-synuclein (αSyn) has been long implicated in the pathogenesis of Parkinson’s disease (PD). However, it has not been fully determined which lipids are involved in the initiation of αSyn...

    Chi-**g Choong, César Aguirre, Keita Kakuda, Goichi Beck in Acta Neuropathologica (2023)

  2. No Access

    Article

    Adding heat stress to repeated-sprint training in hypoxia does not enhance performance improvements in canoe/kayak athletes

    The present study investigated the effects of adding heat stress to repeated-sprint training in hypoxia on performance and physiological adaptations in well-trained athletes.

    Keiichi Yamaguchi, Seishiro Kayanuma, Ayano Imai in European Journal of Applied Physiology (2023)

  3. Article

    Open Access

    Macromolecular crowding and supersaturation protect hemodialysis patients from the onset of dialysis-related amyloidosis

    Dialysis-related amyloidosis (DRA), a serious complication among long-term hemodialysis patients, is caused by amyloid fibrils of β2-microglobulin (β2m). Although high serum β2m levels and a long dialysis vint...

    Kichitaro Nakajima, Keiichi Yamaguchi, Masahiro Noji in Nature Communications (2022)

  4. Article

    Open Access

    Two-step screening method to identify α-synuclein aggregation inhibitors for Parkinson’s disease

    Parkinson’s disease is a neurodegenerative disease characterized by the formation of neuronal inclusions of α-synuclein in patient brains. As the disease progresses, toxic α-synuclein aggregates transmit throu...

    Makoto Hideshima, Yasuyoshi Kimura, César Aguirre, Keita Kakuda in Scientific Reports (2022)

  5. No Access

    Article

    Effects of combined hot and hypoxic conditions on muscle blood flow and muscle oxygenation during repeated cycling sprints

    The purpose of the present study was to determine muscle blood flow and muscle oxygenation during repeated-sprint exercise under combined hot and hypoxic conditions.

    Keiichi Yamaguchi, Daichi Sumi, Nanako Hayashi in European Journal of Applied Physiology (2021)

  6. No Access

    Article

    Hepcidin response to three consecutive days of endurance training in hypoxia

    The purpose of this study was to determine the effects of 3 consecutive days of endurance training in hypoxia on hepcidin responses.

    Daichi Sumi, Nanako Hayashi, Keiichi Yamaguchi in European Journal of Applied Physiology (2021)

  7. Article

    Open Access

    Breakdown of supersaturation barrier links protein folding to amyloid formation

    The thermodynamic hypothesis of protein folding, known as the “Anfinsen’s dogma” states that the native structure of a protein represents a free energy minimum determined by the amino acid sequence. However, i...

    Masahiro Noji, Tatsushi Samejima, Keiichi Yamaguchi, Masatomo So in Communications Biology (2021)

  8. No Access

    Article

    A designer molecular chaperone against transmissible spongiform encephalopathy slows disease progression in mice and macaques

    Transmissible spongiform encephalopathies (TSEs) are fatal neurodegenerative diseases that lack therapeutic solutions. Here, we show that the molecular chaperone (N,N′-([cyclohexylmethylene]di-4,1-phenylene)bis(2...

    Keiichi Yamaguchi, Yuji O. Kamatari, Fumiko Ono in Nature Biomedical Engineering (2019)

  9. No Access

    Chapter and Conference Paper

    HTS Millimeter Wave Mixer Antenna-II

    We report on high temperature superconducting (HTS) millimeter wave mixer-antenna-IC performances, such as frequency conversion and fundamental / harmonic mixings in the wide frequency range from 10GHz up to m...

    Katsumi Suzuki, Masahito Ban, Seiichi Tokunaga in Advances in Superconductivity VIII (1996)

  10. No Access

    Chapter and Conference Paper

    Characteristics of Thin Film YBCO Micro-Stripline Resonator by Laser Etching

    The micro-stripline type resonators have been fabricated by YBCO films using maskless laser etching methods. YBCO thin films on MgO(100) substrates are deposited by pulsed excimer laser. In addition, standard ...

    Tsuyoshi Takenaka, Shuichi Fu**o, Keiichi Yamaguchi in Advances in Superconductivity V (1993)

  11. No Access

    Chapter and Conference Paper

    14GHz Y-Ba-Cu-O Microstripline Resonators

    High-Tc superconductor(HTS) resonators are reported in this paper. The YBa2Cu3O7-δ(YBCO) films in this work were pulsed laser deposited onto 0.5mm thick [100] MgO substrates. We have developed superconducting 13....

    Katsumi Suzuki, Shuichi Fu**o, Tsuyosi Takenaka in Advances in Superconductivity IV (1992)