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  1. No Access

    Article

    Alpha-fetoprotein-producing gastric cancer with ruptured liver metastasis mimicking hepatocellular carcinoma

    Alpha-fetoprotein (AFP)-producing gastric cancer is a rare subtype of gastric cancer known for its aggressive nature. We present an uncommon case of a 60s male with multiple liver tumors, initially suggested a...

    Masamichi Kimura, Ryo Matsuoka, Koji Nishikawa in Clinical Journal of Gastroenterology (2024)

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    Article

    The Challenge of Visualizing the Bridging Hydride at the Active Site and Proton Network of [NiFe]-Hydrogenase by Neutron Crystallography

    X-ray crystallography is the most powerful tool for obtaining structural information about protein molecules, affording accurate and precise positions for all of the atoms in the protein except for hydrogen. H...

    Takeshi Hiromoto, Koji Nishikawa, Taro Tamada, Yoshiki Higuchi in Topics in Catalysis (2021)

  3. Article

    Open Access

    Nicotinamide mononucleotide production by fructophilic lactic acid bacteria

    Nicotinamide mononucleotide (NMN), an intermediate in nicotinamide adenine dinucleotide biosynthesis, is recently attracting much attention for its pharmacological and anti-aging efficacies. However, current c...

    Kazane Sugiyama, Kana Iijima, Miyako Yoshino, Hideo Dohra in Scientific Reports (2021)

  4. Article

    Open Access

    A prospective trial of vaccine to prevent hepatitis B virus reactivation after hematopoietic stem cell transplantation

    Hepatitis B virus (HBV) reactivation reportedly occurs frequently after hematopoietic stem cell transplantation (HSCT) in resolved HBV-infected patients. Here, 50 patients with resolved HBV infections and sche...

    Koji Nishikawa, Kiminori Kimura, Yoshinobu Kanda in Bone Marrow Transplantation (2020)

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    Article

    MazF activation causes ACA sequence-independent and selective alterations in RNA levels in Escherichia coli

    Escherichia coli MazF is a toxin protein that cleaves RNA at ACA sequences. Its activation has been thought to cause growth inhibition, primarily through indiscriminate cleavage of RNA. To investigate responses f...

    Kentaro Akiyama, Kazuki Fujisawa, Hiro Kondo, Yuya Netsu in Archives of Microbiology (2020)

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    Article

    Medium-term in vitro conservation of virus-free parthenocarpic tomato plants

    Infection of field-maintained parthenocarpic Solanum lycopersicum L. (tomato) plants with Tomato yellow leaf curl virus provided the motivation to preserve the germplasm by in vitro methods. In this study, a meth...

    Sota Koeda, Shotaro Matsumoto in In Vitro Cellular & Developmental Biology … (2018)

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    Article

    Hydrogens detected by subatomic resolution protein crystallography in a [NiFe] hydrogenase

    A sub-ångström-resolution X-ray crystal structure of [NiFe] hydrogenase, with direct detection of the products of the heterolytic splitting of dihydrogen into a hydride bridging the Ni and Fe and a proton atta...

    Hideaki Ogata, Koji Nishikawa, Wolfgang Lubitz in Nature (2015)

  8. Article

    Open Access

    Association of lower limb muscle mass and energy expenditure with visceral fat mass in healthy men

    A high-calorie diet and physical inactivity, an imbalance between caloric intake and energy consumption, are major causes of metabolic syndrome (MetS), which manifests as accumulation of visceral fat and insul...

    Shusuke Yagi, Muneyuki Kadota, Ken-ichi Aihara in Diabetology & Metabolic Syndrome (2014)

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    Article

    Diffusion-weighted magnetic resonance imaging in autoimmune pancreatitis

    The aim of this study was to investigate the usefulness of diffusion-weighted magnetic resonance imaging (DWI MRI) for the diagnosis and evaluation of autoimmune pancreatitis (AIP).

    Takao Taniguchi, Hisato Kobayashi, Koji Nishikawa in Japanese Journal of Radiology (2009)

  10. No Access

    Chapter and Conference Paper

    Entropy and Mutual Information Analysis of Collective Behavior in Slime Mold Model

    In the research of a multiagent system, the indicators such as a task achievement ratio and a payoff have been used for analyzing a system. These indicators are important for the point that agents need to acco...

    Koji Nishikawa, Hidenori Kawamura in Soft Computing as Transdisciplinary Scienc… (2005)

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    Chapter

    An Organorhodium Tungsten Oxide Cluster with a Windmill-Like Skeleton: Synthesis of [(Cp*Rh)4W4O16] and Direct Observation by ESI-MS of an Unstable Intermediate [Cp*RhClWO4]

    Koji Nishikawa, Koichi Kido in Polyoxometalate Chemistry for Nano-Composi… (2002)