Updated on 2025/02/07

写真a

 
NOZU Tsukasa
 
Organization
Center Education Center
External link

Degree

  • 褐色脂肪組織の熱産生-ストレス交差適応について ( 1992.3   旭川医科大学 )

Research Areas

  • Life Science / Gastroenterology

Education

  • Asahikawa Medical College   Graduate School, Division of Medicine

    - 1992.3

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    Country: Japan

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  • Asahikawa Medical College   Faculty of Medicine

    - 1988.3

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    Country: Japan

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Professional Memberships

Studying abroad experiences

  • 1996.10 - 1998.9   カリフォルニア大学ロサンゼルス校消化器病研究センター   visiting researcher

Papers

  • Splenectomy prevents brain orexin, ghrelin, or oxytocin but not GLP-1-induced improvement of intestinal barrier function in rats Reviewed

    Funayama, T. Nozu, T. Ishioh, M. Igarashi, S. Tanaka, H. Sumi, C. Saito, T. Toki, Y. Hatayama, M. Yamamoto, M. Shindo, M. Takahashi, S. Okumura, T.

    Neurogastroenterology and Motility   e14949   2024.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/nmo.14949

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  • The neurotensin receptor 1 agonist PD149163 alleviates visceral hypersensitivity and colonic hyperpermeability in rat irritable bowel syndrome model Reviewed

    Tsukasa Nozu, Saori Miyagishi, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    Neurogastroenterology & Motility   2024.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/nmo.14925

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  • Brain histamine improves colonic hyperpermeability through the basal forebrain cholinergic neurons, adenosine A2B receptors and vagus nerve in rats Reviewed

    Ishioh, M. Nozu, T. Miyagishi, S. Igarashi, S. Funayama, T. Ueno, N. Okumura, T.

    Biochemical Pharmacology   2024.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.bcp.2024.116201

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  • Tranilast alleviates visceral hypersensitivity and colonic hyperpermeability by suppressing NLRP3 inflammasome activation in irritable bowel syndrome rat models Reviewed

    T. Nozu, H. Arie, S. Miyagishi, M. Ishioh, K. Takakusaki, T. Okumura

    International Immunopharmacology   133   112099   2024.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.intimp.2024.112099

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  • Imeglimin prevents visceral hypersensitivity and colonic hyperpermeability in irritable bowel syndrome rat model Reviewed

    Tsukasa Nozu, Saori Miyagishi, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of Pharmacological Sciences   153 ( 1 )   26 - 30   2023.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jphs.2023.07.002

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  • Phlorizin attenuates postoperative gastric ileus in rats Reviewed

    Tsukasa Nozu, Saori Miyagishi, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    Neurogastroenterology & Motility   2023.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/nmo.14659

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  • Brain neuropeptides, neuroinflammation and irritable bowel syndrome Invited Reviewed

    Masatomo Ishioh, Tsukasa Nozu, Toshikatsu Okumura

    Digestion   2023.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1159/000533275

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  • Ghrelin prevents lethality in a rat endotoxemic model through central effects on the vagal pathway and adenosine A2B signaling : Brain ghrelin and anti-septic action Reviewed

    Sho Igarashi, Tsukasa Nozu, Masatomo Ishioh, Takuya Funayama, Chihiro Sumi, Takeshi Saito, Yasumichi Toki, Mayumi Hatayama, Masayo Yamamoto, Motohiro Shindo, Hiroki Tanabe, Toshikatsu Okumura

    Journal of Physiology and Biochemistry   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s13105-023-00962-4

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  • Centrally administered GLP-1 analogue improves intestinal barrier function through the brain orexin and the vagal pathway in rats Reviewed

    Takuya Funayama, Tsukasa Nozu, Masatomo Ishioh, Sho Igarashi, Chihiro Sumi, Takeshi Saito, Yasumichi Toki, Mayumi Hatayama, Masayo Yamamoto, Motohiro Shindo, Hiroki Tanabe, Toshikatsu Okumura

    Brain Research   1809   148371   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.brainres.2023.148371

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  • Prostaglandin I2 suppresses the development of gut-brain axis disorder in irritable bowel syndrome in rats Reviewed

    Shima Kumei, Masatomo Ishioh, Tsukasa Nozu, Toshikatsu Okumura

    Biochimica et Biophysica Acta (BBA) - General Subjects   1867 ( 5 )   130344   2023.3

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    DOI: 10.1016/j.bbagen.2023.130344

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  • A Case of Adult-onset Periodic Fever, Aphthous Stomatitis, Pharyngitis and Cervical Adenitis Syndrome Responsive to Colchicine Reviewed

    Tsukasa Nozu, Masumi Ohhira, Masatomo Ishioh, Toshikatsu Okumura

    Internal Medicine   2023

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  • Activation of basal forebrain cholinergic neurons improves colonic hyperpermeability through the vagus nerve and adenosine A2B receptors in rats Reviewed

    Masatomo Ishioh, Tsukasa Nozu, Saori Miyagishi, Sho Igarashi, Takuya Funayama, Masumi Ohhira, Toshikatsu Okumura

    Biochemical Pharmacology   206   115331   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.bcp.2022.115331

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  • Oxytocin acts centrally in the brain to improve leaky gut through the vagus nerve and a cannabinoid signaling in rats Reviewed

    Toshikatsu Okumura, Tsukasa Nozu, Masatomo Ishioh, Sho Igarashi, Takuya Funayama, Shima Kumei, Masumi Ohhira

    Physiol Behav .   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physbeh.2022.113914

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  • A patient with familial Mediterranean fever mimicking diarrhea-dominant irritable bowel syndrome who successfully responded to treatment with colchicine: a case report Reviewed

    Shima Kumei, Masatomo Ishioh, Yuki Murakami, Katsuyoshi Ando, Tsukasa Nozu, Toshikatsu Okumura

    Journal of Medical Case Reports   16   2022.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1186/s13256-022-03446-z

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  • Pathophysiological Commonality Between Irritable Bowel Syndrome and Metabolic Syndrome: Role of Corticotropin-releasing Factor-Toll-like Receptor 4-Proinflammatory Cytokine Signaling Reviewed

    Tsukasa Nozu, Toshikatsu Okumura

    J Neurogastroenterol Motil   28 ( 2 )   173 - 184   2022.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5056/jnm21002

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  • Peripheral apelin mediates visceral hypersensitivity and impaired gut barrier in a rat irritable bowel syndrome model Reviewed

    Tsukasa Nozu, Saori Miyagishi, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    Neuropeptides   94   102248   2022.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.npep.2022.102248

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  • Activation of central adenosine A2B receptors mediate brain ghrelin-induced improvement of intestinal barrier function through the vagus nerve in rats Reviewed

    Masatomo Ishioh, Tsukasa Nozu, Sho Igarashi, Hiroki Tanabe, Shima Kumei, Masumi Ohhira, Kaoru Takakusaki, Toshikatsu Okumura

    Experimental Neurology   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.expneurol.2021.113708

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  • EMA401, an angiotensin II type 2 receptor antagonist blocks visceral hypersensitivity and colonic hyperpermeability in rat model of irritable bowel syndrome Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of Pharmacological Sciences   146 ( 3 )   121 - 124   2021.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jphs.2021.04.001

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  • Phlorizin attenuates visceral hypersensitivity and colonic hyperpermeability in a rat model of irritable bowel syndrome Reviewed

    Tsukasa Nozu, Saori Miyagishi, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    Biomedicine & Pharmacotherapy   139   2021.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.biopha.2021.111649

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  • Centrally administered butyrate improves gut barrier function, visceral sensation and septic lethality in rats Reviewed

    Toshikatsu Okumura, Tsukasa Nozu, Masatomo Ishioh, Sho Igarashi, Shima Kumei, Masumi Ohhira

    Journal of Pharmacological Sciences   146 ( 2021 )   183 - 191   2021.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jphs.2021.04.005

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  • Central regulatory mechanisms of visceral sensation in response to colonic distension with special reference to brain orexin Reviewed

    Okumura T., Ishioh M., Nozu T.

    Neuropeptides   2021.2

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    DOI: 10.1016/j.npep.2021.102129

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  • Centrally administered orexin prevents lipopolysaccharide and colchicine induced lethality via the vagal cholinergic pathway in a sepsis model in rats Reviewed

    Sho Igarashi, Tsukasa Nozu, Masatomo Ishioh, Shima Kumei, Takeshi Saito, Yasumichi Toki, Mayumi Hatayama, Masayo Yamamoto, Motohiro Shindo, Hiroki Tanabe, Toshikatsu Okumura

    Biochemical Pharmacology   182   2020.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.bcp.2020.114262

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  • Imipramine improves visceral sensation and gut barrier in rat models of irritable bowel syndrome Reviewed

    Tsukasa Nozu, Saori Miyagishi, Masatomo Ishioh, Kaoru Takakusaki, Toshikatsu Okumura

    European Journal of Pharmacology   2020.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ejphar.2020.173565

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  • Losartan improves visceral sensation and gut barrier in a rat model of irritable bowel syndrome. Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Neurogastroenterology and Motility   32 ( 6 )   2020.6

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    DOI: 10.1111/nmo.13819

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  • Ghrelin Acts in the Brain to Block Colonic Hyperpermeability in Response to Lipopolysaccharide Through the Vagus Nerve Reviewed

    Ishioh, M., Nozu, T., Igarashi, S., Tanabe, H., Kumei, S., Ohhira, M., Okumura, T.

    Neuropharmacology   173   108116   2020.5

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    DOI: 10.1016/j.neuropharm.2020.108116

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  • Adenosine A1 receptor agonist induces visceral antinociception via 5-HT1A, 5-HT2A, dopamine D1 or cannabinoid CB1 receptors, and the opioid system in the central nervous system Reviewed

    Okumura, T. Nozu, T. Ishioh, M. Igarashi, S. Kumei, S. Ohhira, M.

    Physiology & behavior   2020.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physbeh.2020.112881

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  • Brain orexin improves intestinal barrier function via the vagal cholinergic pathway. Reviewed

    Okumura T., Nozu T., Ishioh M., Igarashi S., Kumei S., Ohhira M.

    Neuroscience Letters   2020.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.neulet.2019.134592.

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  • 5-HT2A receptors but not cannabinoid receptors in the central nervous system mediate levodopa-induced visceral antinociception in conscious rats Reviewed

    Toshikatsu Okumura, Tsukasa Nozu

    Naunyn-Schmiedeberg's Archives of Pharmacology   2020

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  • Butyrate inhibits visceral allodynia and colonic hyperpermeability in rat models of irritable bowel syndrome Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Scientific Reports   2019.12

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  • Metformin inhibits visceral allodynia and increased gut permeability induced by stress in rats Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Toshikatsu Okumura, Kaoru Takakusaki

    Journal of Gastroenterology and Hepatology   34 ( 1 )   186 - 193   2019.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/jgh.14367

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  • Dehydroepiandrosterone sulfate improves visceral sensation and gut barrier in a rat model of irritable bowel syndrome Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    European Journal of Pharmacology   852   198 - 206   2019

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ejphar.2019.03.037

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  • Grape seed extract inhibits visceral allodynia and increased colonic permeability induced by repeated water avoidance stress in rats Reviewed

    Hideyuki Arie, Tsukasa Nozu, Saori Miyagishi, Masayuki Ida, Takayuki Izumo, Hiroshi Shibata

    Nutrients   2019

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  • [Mechanism of visceral hypersensitivity in patients with irritable bowel syndrome].

    Tsukasa Nozu, Toshikatsu Okumura

    Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology   116 ( 7 )   552 - 559   2019

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.11405/nisshoshi.116.552

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  • Central oxytocin signaling mediates the central orexin-induced visceral antinociception through the opioid system in conscious rats Reviewed

    Okumra T., Nozu T., Kumei S., Ohhira M.

    Physiology & behavior   198   96 - 101   2018.10

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    DOI: 10.1016/j.physbeh.2018.10.007

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  • Role of the cannabinoid signaling in the brain orexin- and ghrelin-induced visceral antinociception in conscious rats Reviewed

    Toshikatsu Okumura, Tsukasa Nozu

    Journal of Pharmacological Sciences   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jphs.2018.06.001

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  • Ghrelin acts centrally to induce an antinociceptive action during colonic distension through the orexinergic, dopaminergic and opioid systems in conscious rats Reviewed

    Okumura, T., Nozu, T., Kumei, S., Takakusaki, K., Ohhira, M.

    Brain research   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.brainres.2018.02.024

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  • A glucagon-like peptide-1 analog, liraglutide improves visceral sensation and gut permeability in rats Reviewed

    Tsukasa Nozu, Saori Miyagishi, Shima Kumei, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of Gastroenterology and Hepatology   33 ( 1 )   232 - 239   2018.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/jgh.13808

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  • Altered colonic sensory and barrier functions by CRF: roles of TLR4 and IL-1 Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of endocrinology   239 ( 2 )   241 - 252   2018

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1530/JOE-18-0441

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  • Pioglitazone improves visceral sensation and colonic permeability in a rat model of irritable bowel syndrome Reviewed

    Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of Pharmacological Sciences   139 ( 2019 )   46 - 49   2018

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jphs.2018.11.006.

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  • Central oxytocin signaling mediates the central orexin-induced visceral antinociception through the opioid system in conscious rats. Reviewed

    Toshikatsu Okumura, Tsukasa Nozu, Shima Kumei, Masumi Ohhira

    Physiology and Behavior   2018

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    DOI: 10.1016/j.physbeh

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  • Repeated water avoidance stress induces visceral hypersensitivity; role of IL-1, IL-6 and peripheral corticotropin-releasing factor Reviewed

    Nozu, T., Miyagishi, S., Nozu, R., Takakusaki, K., Okumura, T.

    J Gastroenterol Hepatol   32 ( 12 )   1958 - 1965   2017.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/jgh.13787

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  • Lovastatin inhibits visceral allodynia and increased colonic permeability induced by lipopolysaccharide or repeated water avoidance stress in rats Reviewed

    Tsukasa Nozu, Saori Myagishi, Shima Kumei, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    European Journal of Pharmacology   818   228 - 234   2017.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ejphar.2017.10.056

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  • Lipopolysaccharide induces visceral hypersensitivity: role of interleukin-1, interleukin-6, and peripheral corticotropin-releasing factor in rats. Reviewed

    Nozu T., Miyagishi S., Nozu R., Takakusaki K., Okumura T.

    Journal of Gstroenterology   52 ( 1 )   72 - 80   2017.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s00535-016-1208-y

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  • Cold Exposure Related Fever with an MEFV Gene Mutation Reviewed

    Shima Kumei, Tsukasa Nozu, Masumi Ohira, Saori Miyagishi, Toshikatsu Okumura

    Internal Medicine   2017

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  • Brainstem control of locomotion and muscle tone with special reference to the role of the mesopontine tegmentum and medullary reticulospinal systems. Reviewed

    K. Takakusaki, R. Chiba, T. Nozu, T. Okumura

    Journal of Neuralal Transmission   123 ( 7 )   695 - 729   2016.7

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    DOI: 10.1007/s00702-015-1475-4

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  • Water avoidance stress induces visceral hyposensitivity through peripheral corticotropin releasing factor receptor type 2 and central dopamine D2 receptor in rats. Reviewed

    T. NOZU, S. MIYAGISHI, R. NOZU, K. TAKAKUSAKI, T. OKUMURA

    Neurogastroenterology and Motility   28 ( 4 )   522 - 531   2016.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/nmo.12747

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  • Adenosine A1 receptors mediate the intracisternal injection of orexin-induced antinociceptive action against colonic distension in conscious rats. Reviewed

    Okumura T., Nozu T., Kumei S., Takakusaki K., Miyagishi S., Ohhira M.

    Journal of the Neurological Sciences   362   106 - 110   2016.3

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    DOI: 10.1016/j.jns.2016.01.031

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  • Levodopa acts centrally to induce an antinociceptive action against colonic distension through activation of D2 dopamine receptors and the orexinergic system in the brain in conscious rats. Reviewed

    Okumura T., Nozu T., Kumei S., Takakusaki K., Miyagishi S., Ohhira M.

    Journal of Pharmacological Science   130 ( 2 )   123 - 127   2016.2

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    DOI: 10.1016/j.jphs.2016.01.007

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  • Bullous pemphigoid and percutaneous endoscopic gastrostomy Reviewed

    Tsukasa Nozu, Toshikatsu Okumura

    Geriatrics and Gerontology International   16 ( 10 )   1173 - 1174   2016

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  • Retropharyngeal Calcific Tendinitis Reviewed

    Tsukasa Nozu, Shima Kumei, Masumi Ohhira, Toshikatsu Okumura

    Internal Medicine   54   2277 - 2277   2015.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2169/internalmedicine.54.4682

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  • Antinociceptive action against colonic distension by brain orexin in conscious rats. Reviewed

    Okumura T., Nozu T., Kumei S., Takakusaki K., Miyagishi S., Ohhira M.

    Brain Research   1598   12 - 17   2015.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.brainres.2014.12.021

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  • Corticotropin-releasing factor receptor type 1 and type 2 interaction in irritable bowel syndrome Reviewed

    Tsukasa Nozu, Toshikatsu Okumura

    Journal of Gastroenterology   50 ( 9 )   819 - 830   2015

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s00535-015-1086-8

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  • Colorectal distention induces acute and delayed visceral hypersensitivity: role of peripheral corticotropin-releasing factor and interleukin-1 in rats Reviewed

    Tsukasa Nozu, Shima Kumei, Saori Miyagishi, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of Gastroenterology   2015

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s00535-015-1070-3

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  • Screening for Major Depressive Disorder with the Patient Health Questionnaire (PHQ-9 and PHQ-2) in an Outpatient Clinic Staffed by Primary Care Physicians in Japan: A Case Control Study. Reviewed

    Keiko Suzuki, Shima Kumei, Masumi Ohhira, Tsukasa Nozu, Toshikatsu Okumura

    PLoS One   10 ( 3 )   e0119147   2015

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    DOI: 10.1371/journal.pone.0119147

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  • Involvement of the dopaminergic system in the central orexin-induced antinociceptive action against colonic distension in conscious rats Reviewed

    T. Okumura, T. Nozu, S. Kumei, K. Takakusaki, S. Miyagishi, M. Ohhira

    Neuroscience Letters   605   34 - 38   2015

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    DOI: 10.1016/j.neulet.2015.08.013

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  • Water-avoidance stress enhances gastric contractions in freely moving conscious rats: role of peripheral CRF receptors Reviewed

    Tsukasa Nozu, Shima Kumei, Kaoru Takakusaki, Toshikatsu Okumura

    Journal of Gastroenterology   49 ( 5 )   799 - 805   2014

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    DOI: 10.1007/s00535-013-0828-8

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  • A balance theory of peripheral corticotropin-releasing factor receptor type 1 and type 2 signaling to induce colonic contractions and visceral hyperalgesia in rats Reviewed

    Tsukasa Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Endocrinology   155 ( 12 )   4655 - 4664   2014

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1210/en.2014-1421

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  • An adult patient with cyclic vomiting syndrome successfully treated with oral sumatriptan. Reviewed

    Toshikatsu Okumura, Masumi Ohhira, Shima Kumei, Tsukasa Nozu

    American Journal of Gastroenterology   109 ( 2 )   292 - 293   2014

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/ajg.2013.372

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  • Urocortin 2 blocks the suppression of gastric antral contractions induced by lipopolysaccharide in freely moving conscious rats Reviewed

    Tsukasa Nozu, Kaoru Takakusaki, Toshikatsu Okumura

    Regulatory Peptides   190-191   12 - 17   2014

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.regpep.2014.04.004

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  • Peripheral corticotropin-releasing factor (CRF) induces stimulation of gastric contractions in freely moving conscious rats: role of CRF receptor types 1 and 2 Reviewed

    T.Nozu, Y.Tsuchiya, S.Kumei, K.Takakusaki, T.Okumura

    Neurogastroenterology and Motility   25   190 - 197   2013.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/nmo.12050

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  • A higher frequency of lumbar OPLL in erderly in an outpatient clinic in Japan Reviewed

    Okumura T., Ohhira, Kumei S., Nozu T.

    International Journal of General Medicine   6   729 - 732   2013

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    DOI: 10.2147/IJGM.S48941

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  • Inhibition of corticotropin releasing factor (CRF) receptor type 2 signaling enhances peripheral CRF-induced stimulation of colonic contractions in conscious rats Reviewed

    Tsukasa Nozu, Toshikatsu Okumura

    Gastroenterology   144 ( Suppl 1 )   S-712   2013

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  • Peritoneal loose body. Reviewed

    T. Nozu, T. Okumura

    Intern Med.   51   2057 - 2057   2012.8

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  • Clinical features of the patients with functional dyspepsia visiting primary care physician Invited

    T. Nozu

    55 ( 1 )   1 - 6   2012.7

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  • Endogenous orexin-A in the brain mediates 2-deoxy-D-glucose-induced stimulation of gastric motility in freely moving conscious rats. Reviewed

    T. Nozu, Y. Tsuchiya, S. Kumei, K. Takakusaki, K. Ataka, M. Fujimiya, T. Okumura

    J Gastroenterol.   47 ( 4 )   404 - 411   2012.4

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    DOI: 10.1007/s00535-011-0506-7

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  • Chronic right lower abdominal pain due to lumbar ossification of the posterior longitudinal ligament (OPLL). Reviewed

    T. Okumura, K. Ebisawa, M. Ohhira, T. Nozu, Y. Tsuchiya, M. Inoue, M. Tanaka

    Am J Gastroenterol.   107 ( 1 )   142 - 143   2012.1

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    DOI: 10.1038/ajg.2011.319

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  • The rate of polymyalgia rgheumatica (PMR) and remitting seronegative symmetrical synovitis with pitting edema (RS3PE) syndrome in a clinic where primari care physicians are working in Japan Reviewed

    T. Okumura, S. Tanno, M. Ohhira, T. Nozu

    Rheumatol Int.   32 ( 6 )   1695 - 1699   2012

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  • Epiploic appendagitis as an uncommon cause of lower abdominal pain. Reviewed

    T. Okumura, M. Ohhira, Y. Tsuchiya, Y. Kikuchi, Y. Kohogo, S. Yoshihara, H. Okabe, T. Nozu

    Open J Gastroenterol.   2   31 - 33   2012

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  • IL-1 Receptor Antagonist Blocks the Lipopolysaccharide-Induced Inhibition of Gastric Motility in Freely Moving Conscious Rats. Reviewed

    Y. Tsuchiya, T. Nozu, S. Kumei, M. Ohhira, T. Okumura

    Dig Dis Sci   57 ( 10 )   2555 - 2561   2012

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    DOI: 10.1007/s10620-012-2210-8

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  • Modulatory effects of the GABAergic basal ganglia neurons on the PPN and the muscle tone inhibitory system in cats. Reviewed

    K. Takakusaki, K. Obara, T. Nozu, T. Okumura

    Arch Ital Biol.   149 ( 4 )   385 - 405   2011.12

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  • Central orexin-A increases colonic motility in conscious rats. Reviewed

    T. Nozu, S. Kumei, K. Takakusaki, K. Ataka, M. Fujimiya, T. Okumura

    Neurosci Lett.   498 ( 2 )   143 - 146   2011.8

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  • Severe hyponatremia in association with I 131 therapy in patient with metastatic thyroid cancer. Reviewed

    T. Nozu, Y. Yoshida, M. Ohhira, T. Okumura

    Intern Med.   50 ( 19 )   2169 - 2174   2011

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  • Visceral sensation and irritable bowel syndrome; with special reference to comparison with functional abdominal pain syndrome. Invited

    T. Nozu, T. Okumura

    J Gastroenterol Hepatol.   26   122 - 127   2011

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    DOI: 10.1111/j.1440-1746.2011.06636.x

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  • Role of brain orexin in the pathophysiology of functional gastrointestinal disorders. Invited

    T. Okumura, T. Nozu

    J Gastroenterol Hepatol.   26   61 - 66   2011

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    DOI: 10.1111/j.1440-1746.2011.06626.x

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  • Acquired factor V inhibitor in a patient with a mechanical aortic valve under warfarinization Reviewed

    T. Nozu, H. Mita, T. Okumura

    Intern Med   49 ( 20 )   2229 - 2233   2010.4

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    DOI: 10.2169/internalmedicine.49.4042

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  • Bullous pemphigoid and percutaneous endoscopic gastrostomy Reviewed

    T. Nozu, H. Mita

    Intern Med.   49   971 - 975   2010.4

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  • Characteristics in patients with headache in an outpatient clinic in Japan Reviewed

    T. Okumura, S. Tanno, M. Ohhira, T. Nozu

    Asia Pac Fam Med.   9   10   2010

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    DOI: 10.1186/1447-056X-9-10

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  • Altered rectal sensory response induced by balloon distention in patients with functional abdominal pain syndrome Reviewed

    T. Nozu, M. Kudaira

    Biopsychosoc. Med   3   13 - 13   2009.4

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  • Idiopathic spontaneous intramural hematoma of the colon: a case report and review of the literature Reviewed

    T. Nozu

    Clin. J. Gatroenterol.   2 ( 3 )   161 - 165   2009.4

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  • Emphysematous cystitis with air bubbles in the inferior vena cava Reviewed

    T. Nozu

    Int. J. Urology   15   947 - 947   2008.4

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  • Clinical characteristics of asymptomatic esophagitis Reviewed

    T. Nozu, H. Komiyama

    J Gastroenterol   43   27 - 31   2008.4

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  • Pneumatosis cystoides intestinalis Reviewed

    T. Nozu

    Intern Med   47   325 - 325   2008.4

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  • Repetitive rectal painful distention induces rectal hypersensitivity in patients with irritable bowel syndrome. Reviewed

    T. Nozu, M. Kudaira, S. Kitamori, A. Uehara

    J. Gastroenterol   41   217 - 222   2006.4

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  • Corticotropin-releasing factor induces rectal hypersensitivity after repetitive rectal painful distention in healthy humans Reviewed

    T. Nozu, M. Kudaira

    J. Gastroenterol.   41   740 - 744   2006.4

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  • 消化管機能異常症とは?

    野津 司

    診断と治療   93 ( 3 )   348 - 353   2005.4

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  • The diagnoses and outcome of patients complaining of fever without any abnormal findings on diagnostic tests Reviewed

    T. Nozu, A. Uehara

    Intern. Med   44   901 - 902   2005.4

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  • Peripheral injection of sauvagine prevents repeated colorectal distension-induced visceral pain in female rats Reviewed

    M. Million, C. Maillo, D.A. Adelson, T. Nozu, A. Gauthier, J Rivier, G.P. Chrousos, A. Bayati, H. Mattsson, Y. Taché

    Peptides   26   1188 - 1195   2005.4

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  • Fitz-Hugh-Curtis syndrome. Reviewed

    T. Nozu, H. Komiyama

    Intern. Med.   45   1645 - 1645   2005.4

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  • 毎朝胃がもたれ,胸焼けがすると訴える患者が来たら

    野津 司

    診断と治療   93 ( 3 )   348 - 353   2005.4

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  • Isolated dissection of the superior mesenteric artery. Reviewed

    T. Nozu, H. Komiyama, T. Okumura

    Gastroenterol   127   1029 - 1282   2004.4

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  • Inadequate health care-seeking behavior of Japanese patients with functional gastrointestinal disorders: a preliminary survey. Reviewed

    T. Nozu, M. Kudaira, S. Kitamori, A. Uehara

    J. Gastroenterol.   37   231 - 232   2002

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  • Peripheral urocortin delays gastric emptying: role of CRF receptor 2. Reviewed

    T. Nozu, V. Martinez, J. Rivier, Y. Tache

    Am J Physiol   276   G867 - G874   1999

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  • Malignant intestinal schwannoma: a case report and a review of the literature in Japan. Reviewed

    T. Nozu, A. Takahashi, H. Asakawa, A. Uehara, Y. Kohgo, T. Suzuki

    Intern. Med.   34   1101 - 1105   1995

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    DOI: 10.2169/internalmedicine.34.1101

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  • Effects of ranitidine on gastric vesicles containing H, K-adenosine triphosphatase in rats. Reviewed

    K. Kubo, A. Uehara, T. Kubota, T. Nozu, M. Moriya, Y. Watanabe, E. Shoji, S.B. Santos, K. Harada, Y. Kohgo

    Scand.J. Gastroenterol.   30   944 - 951   1995

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  • Undifferentiated carcinoma in the cardioesophageal junction which produces parathyroid hormone related protein. Reviewed

    T. Nozu, A. Takahashi, A. Uehara, Y. Kohgo, T. Suzuki

    Intern. Med.   34   695 - 699   1995

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    DOI: 10.2169/internalmedicine.34.695

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  • Non-thermal stress-induced modifications of fatty acids profiles in rat brown adipose tissue. Reviewed

    T. Ohno, K. Ogawa, H. Ohinata, T. Nozu, A. Kuroshima

    J.Therm.Biol.   17   251 - 256   1992

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    DOI: 10.1016/0306-4565(92)90062-K

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  • Effects of running training on in vitro brown adipose tissue thermogenesis in rats. Reviewed

    T. Nozu, K. Kikuchi, K. Ogawa, A. Kuroshima

    Int.J. Biometeorol.   36   88 - 92   1992

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    DOI: 10.1007/BF01208918

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  • Effect of immobilization stress on in vitro and in vivo thermogenesis of brown adipose tissue. Reviewed

    T. Nozu, S. Okano, K. Kikuchi, T. Yahata, A. Kuroshima

    Jpn.J.Physiol.   42   299 - 308   1992

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    DOI: 10.2170/jjphysiol.42.299

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  • In vitro thermogenesis of brown adipose tissue in fasted rats. Reviewed

    K. Kikuchi, S. Okano, T. Nozu, T. Yahata, A. Kuroshima

    Jpn.J.Physiol.   42   165 - 170   1992

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Books

  • 機能性消化管疾患の診断と治療 : 神経消化器病学への招待

    金子, 宏, 千葉, 俊美, 福土, 審, 前田, 耕太郎, 三輪, 洋人( Role: Contributor難治性腹痛への対応)

    朝倉書店  2024.10  ( ISBN:9784254322729

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    Total pages:vii, 384p   Language:Japanese  

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MISC

  • 難治性腹痛への対応

    野津 司

    機能性消化管疾患の診断と治療   2024

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  • 脳腸相関にかかわる生理活性物質CRH

    野津 司

    臨床栄養5月増刊号   2016.5

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  • 【機能性消化管障害(FGID):診断と治療の進歩】 代表的疾患の診療の現況と将来展望 機能性腹痛症候群

    野津 司

    日本内科学会雑誌   102 ( 1 )   90 - 95   2013.1

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  • たかがアッペ,されどアッペ・・・これが見えたら虫垂炎!

    野津 司

    レジデントノート   14 ( 7 )   1318 - 1323   2012.8

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  • IBSの典型症例と治療例

    野津 司

    IBS診療QandA   2012

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Presentations

  • apelinは内臓知覚過敏と腸管バリアの傷害を誘導し過敏性腸症候群の病態に関与する

    野津 司, 奥村 利勝

    GI week 2024  日本潰瘍学会

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    Event date: 2024.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄コンベンションセンター(沖縄県宜野湾)  

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  • lovastatinはIBSモデルの内臓知覚過敏・腸管透過性亢進を抑制する

    野津 司, 奥村 利勝

    第25回日本神経消化器病学会 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 反復水回避ストレスによる内臓知覚過敏と腸管透過性亢進の機序について

    野津 司, 奥村 利勝

    第24回日本神経消化器病学会  神経消化器病学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:旭川  

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  • メトホルミンはIBSモデルの内臓知覚過敏・腸管透過性亢進を抑制する

    野津 司, 奥村 利勝

    第24回日本神経消化器病学会  神経消化器病学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:旭川  

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  • SGLT阻害薬のphlorizinはIBSモデルの内臓知覚過敏・腸管透過性亢 進を抑制する

    野津 司, 奥村 利勝

    潰瘍学会 

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    Event date: 2022.2

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • イミプラミンはIBSモデルの内臓知覚過敏・腸管透過性亢進を抑制する International conference

    野津 司, 石王 応知, 奥村 利勝

    神経消化器病学会 

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    Event date: 2021.10

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • アンジオテンシンII受容体拮抗薬はIBSモデルの内臓知覚過敏・腸管透過性亢進を抑制する International conference

    野津 司, 石王 応知, 奥村 利勝

    神経消化器病学会 

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    Event date: 2021.10

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • ストレスによる内臓知覚,腸管透過性の変化-末梢corticotropin-releasing factorの役割と過敏性腸症候群

    野津 司, 奥村 利勝

    消化器病学会週間 

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    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:神戸  

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  • ストレスによる内臓知覚,腸管透過性の変化-末梢corticotropin-releasing factorの役割と過敏性腸症候群

    野津 司, 奥村 利勝

    DDW Japan 2019  日本消化器病学会

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    Event date: 2019.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:神戸  

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  • 腹膜垂炎と腹腔内遊離体

    奥村利勝

    第123回日本消化器病学会北海道支部例会【地方】  日本消化器病学会北海道支部

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    Event date: 2018.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • 水疱性類天疱瘡と経皮内視鏡的胃瘻造設術

    奥村利勝

    第117回日本消化器内視鏡学会北海道支部例会【地方】  日本消化器内視鏡学会北海道支部

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    Event date: 2018.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • STRESS, CRF AND GUT International conference

    Tsukasa Nozu

    Summer School on Stress  Stress Education

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    Event date: 2018.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Osaka  

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  • ワークショップ15「過敏性腸症候群のすべて」glucagon-like peptide-1アナログ,リラグルチドの内臓知覚と腸管透過性に対する効果について

    野津 司, 奥村 利勝

    第14回日本消化管学会総会学術集会  日本消化管学会

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    Event date: 2018.2

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

    Venue:東京  

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  • 過敏性腸症候群におけるcorticotropin-releasing factorの役割

    野津 司, 奥村 利勝

    G+ The 3rd meeting  ゼリア新薬工業

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    Event date: 2017.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京  

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  • シンポジウム2 大腸機能性疾患の病態,診断治療の現状と展望ーストレス,CRF,過敏性腸症候群

    野津 司, 奥村 利勝

    第72回日本大腸肛門病学会学術集会  日本大腸肛門病学会

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    Event date: 2017.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福岡  

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  • 過敏性腸症候群とcorticotropin-releasing factor

    野津 司, 奥村 利勝

    消化器病学会北海道支部地方会  日本消化器病学会

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    Event date: 2017.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • Repeated water avoidance stress induces visceral hypersensitivity; role of IL-1, IL-6 and peripheral corticotropin-releasing factor International conference

    Tsukasa Nozu, Toshikatsu Okumura

    5th Biennial Congress of the Asian Neurogastroenterology & Motility Association 

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    Event date: 2017.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Osaka International Convention Center  

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  • 消化管運動と内臓知覚における末梢CRF受容体サブタイプの役割-balance theoryについて

    野津 司, 奥村 利勝

    日本神経消化器病学会 

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    Event date: 2016.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • 末梢corticotropin-releasing factorと胃運動-functional dyspepsiaとの関連について

    野津 司, 奥村 利勝

    第44回日本潰瘍学会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:旭川  

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  • 消化管運動と内臓知覚における末梢CRF受容体サブタイプの役割-balance theoryについて

    野津 司, 奥村 利勝

    日本神経消化器病学会 

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    Event date: 2015.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • Peripheral corticotropin-releasing factor (CRF) induces stimulation of colonic contractions and visceral hyperalgesia in rats; role of CRF receptor type 1 and 2

    Digestive Disease Week Japan 

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    Event date: 2014.10

    Language:English   Presentation type:Symposium, workshop panel (public)  

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  • 末梢CRFと胃運動-FDの病態生理との関連について

    野津 司, 奥村利勝

    日本消化器病学会週間  日本消化器病学会

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    Event date: 2013.10

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

    Venue:東京  

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  • Inhibition of corticotropin releasing factor (CRF) receptor type 2 signaling enhances peripheral CRF-induced stimulation of colonic contractions in conscious rats International conference

    Tsukasa Nozu, Tozhikatsu Okumura

    米国消化器病学会  AGA

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    Event date: 2013.5

    Language:English   Presentation type:Poster presentation  

    Venue:Olrando, Florida  

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  • オレキシンと消化管運動

    野津 司, 奥村利勝

    消化器学会週間  日本消化器病学会

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    Event date: 2012.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:神戸  

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  • Visceral sensation and irritable bowel syndrome; with special reference to comparison with functional abdominal pain syndrome International conference

    野津 司

    Asian Pacific Topic Conference 

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    Event date: 2010.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:東京  

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  • シンポジウム 無症候性逆流性食道炎患者の臨床的検討

    野津 司

    第49回日本消化器病学会大会 

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    Event date: 2007.10

    Language:Japanese   Presentation type:Symposium, workshop panel (public)  

    Venue:神戸  

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  • Repeated rectal distention induces visceral hypersensitivity in irritable bowel syndrome patients; possible contribution of corticotrophin-releasing factor International conference

    野津 司

    Digestive Disease Week and Annual Meeting of American Gastroenterological Association. 

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    Event date: 2007.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Washington, D.C  

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Awards

  • 第24回日本神経消化器病学会並木賞

    2022.9   日本神経消化器病学会  

    野津 司

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 日本消化器病学会北海道支部奨励賞

    2018.3   日本消化器病学会北海道支部  

    野津 司

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 日本潰瘍学会学会賞

    2016.9   日本潰瘍学会  

    野津 司

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 第3回Japan Gut Club奨励賞

    2012.11   Japan Gut Club  

    野津 司, 奥村 利勝

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 日本神経消化器病学会優秀演題賞

    2011.11   日本神経消化器病学会  

    野津 司

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Asian Pacific Topic Conference Young Investigator Award

    2010.11   Asian Pacific Topic Conference  

    野津 司

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    Award type:Award from international society, conference, symposium, etc.  Country:Japan

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  • Japan Gut Club奨励賞

    2010.10   Japan Gut Club  

    野津 司

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

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  • 第20回日本消化器病学会奨励賞受賞

    2007.4   日本消化器病学会  

    野津 司

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 日本内科専門医会研究奨励賞

    2000.4   日本内科専門医会  

    野津 司, 大滝純司, 首藤龍人, 久保光司

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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Research Projects

  • 脳内histamine神経系による腸管バリア制御機序の解明とleaky gut関連疾患への治療応用

    Grant number:24K11163  2024.4 - 2027.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    石王 応知, 野津 司, 奥村 利勝

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    Grant amount:\4,550,000 ( Direct Cost: \3,500,000 、 Indirect Cost:\1,050,000 )

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  • 中枢神経系を介した敗血症死阻止メカニズムの解明 -Ghrelinの関与ー

    Grant number:23K06842  2023.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    奥村 利勝, 高草木 薫, 野津 司

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    Grant amount:\4,680,000 ( Direct Cost: \3,600,000 、 Indirect Cost:\1,080,000 )

    申請者は、中枢神経系がどのように胃腸機能調節に関わるかについての基礎研究を、この30年継続研究し、Gastroenterology3編を含む約90編の脳腸相関に関わる英文原著論文を公表して来た。オレキシンが摂食亢進作用を有すと公表された1998年からこの25年間はオレキシンに関する研究を続け、論文を公表してきた。オレキシンは中枢神経系に作用して胃酸分泌や消化管運動を迷走神経依存性に促進させる。また、オレキシンは中枢神経系に作用して迷走神経依存性に腸管透過性亢進(leaky gut)を改善することを見出した。更に、オレキシンは中枢神経系に作用して、一部このleaky gut改善作用を介して、敗血症の病態を改善することを見出した。今回は脳内でオレキシンと機能的に連関するグレリンが脳に作用して敗血症の病態を改善するかを明らかにすることを目的にしている。この1年の研究では、グレリンの脳室内投与がラットの敗血症死モデル(lipopolysacharrideとコルヒチン皮下投与)において、容量依存性に敗血症死を抑制すること、この作用が迷走神経を介すること、更にこの作用には脳内のオレキシンは関与しないことを見出した。加えて、2-deoxy-d-glucoseによる中枢性迷走刺激は敗血症死を阻止するが、この作用はグレリンの受容体antagonistの脳室内投与によりブロックされたので、脳内で確かにグレリンが作用していることが明らかになった。今後は更にこのグレリンの中枢神経を介する敗血症死阻止作用における末梢のメカニズムを解明する。一つはvagal cholinergic anti-inflammatory pathwayを想定しており、このpathwayには脾臓が関与することが想定されているので、摘脾動物での検討を考慮中である。

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  • 腹部手術後イレウスと術後せん妄に対する新規治療法の探究

    2022.4 - 2026.3

    基盤研究(C)

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    腹部手術後イレウスと術後せん妄に対する新規治療法の探究

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  • Central mechanism of visceral sensation with special reference to brain orexin and its clinical application for irritable bowel syndrome

    Grant number:19K08410  2019.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Okumura Toshikatsu

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    Grant amount:\4,420,000 ( Direct Cost: \3,400,000 、 Indirect Cost:\1,020,000 )

    Visceral hypersensitivity is a major pathophysiology in irritable bowel syndrome (IBS). Little had been known how brain controls visceral sensation. To improve therapeutic strategy in IBS, we should develop a novel approach to control visceral hypersensitivity. Orexin, ghrelin or oxytocin in the brain is capable of inducing visceral antinociception. Dopamine, cannabinoid, adenosine or opioid in the central nervous system (CNS) plays a role in the visceral hyposensitivity. Central ghrelin could induce visceral antinociception via the orexinergic signaling. Orexin induces visceral antinociception through oxytocin. From these evidence, we would like to make a hypothesis that orexin signaling in the brain may play a role in the pathophysiology in a part of patients with IBS who are frequently accompanied with visceral hypersensitivity. We would suggest that modified orexin signaling may lead a novel therapeutic option for IBS.

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  • Exploring novel therapies on the basis of pathophysiological commonality between irritable bowel syndrome and metabolic syndrome

    Grant number:18K07896  2018.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Nozu Tsukasa

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    Grant amount:\4,420,000 ( Direct Cost: \3,400,000 、 Indirect Cost:\1,020,000 )

    Majority of the patients with irritable bowel syndrome (IBS) are known to display visceral hypersensitivity and increased gut permeability. In the present study, we demonstrated that these changes were mediated via CRF, TLR4 and proinflammatory cytokine signaling in rat IBS model. Incidentally, CRF, TLR4 and proinflammatory cytokine signaling have been also reported to be involved in the pathophysiology of metabolic syndrome. We also showed that the drugs used in metabolic syndrome improved these gastrointestinal changes in IBS model, possibly by the suppression of proinflammatory cytokine signaling. These results suggest that IBS and metabolic syndrome may have a similar pathophysiology, which may be a hint for the development of novel therapy of IBS.

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  • 過敏性腸症候群実験動物モデルにおける食品素材有効性の検証

    2017.10 - 2018.12

    サントリーウエルネス株式会社 

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  • 過敏性腸症候群の病態におけるCRF-LPS-サイトカイン経路の役割

    2017.4 - 2018.3

    民間財団等 

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  • Understanding the adaptive brain function in relation to the alteration of posture-locomotor synergies

    Grant number:26120004  2014.7 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Takakusaki Kaoru, Obara Kazuhiro, Nakajima Toshi, Takahashi Mirai, Miyagishi Saori, Nozu Tsukasa, Okumura Toshikatsu, Matsumoto seiji, Funakoshi Hiroshi

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    Grant amount:\122,980,000 ( Direct Cost: \94,600,000 、 Indirect Cost:\28,380,000 )

    In this project, attempts were made to elucidate neuronal mechanisms of adaptive posture-gait strategy using animal experimentation and human examination. Major findings are 1) the basic mechanisms which generate and coordinate posture-gait muscle synergies are located in the brain-stem and spinal cord, 2) cognitive information of the self-body and environment which is generated at the parietal cortex is sent to the motor areas at frontal cortex so that motor programs that induce "anticipatory postural adjustment" and "precise gait limb movements” are constructed, 3) these motor programs may achieve adaptive posture and gait control against the changes in environment through the activation of the brain-stem and spinal cord neural networks. These findings suggest that the higher order cortical function that is specifically inherent in the fronto-parietal cortical networks plays a crucial role in the execution of adaptive posture-gait behaviors.

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  • Role of brain orexin in the pathogenesis of irritable bowel syndrome

    Grant number:26460955  2014.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Toshikatsu Okumura

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    Grant amount:\5,070,000 ( Direct Cost: \3,900,000 、 Indirect Cost:\1,170,000 )

    We tried to clarify the brain mechanism to regulate visceral sensation. Visceral sensation was evaluated by colonic distension-induced abdominal withdrawal reflex (AWR) in conscious rats. Intracisternal injection of orexin-A dose-dependently increased the AWR threshold volume, suggesting that orexin acts centrally to induce an visceral antinociceptive action. The orexin-induced visceral antinociception mediate the morphin-, levodopa or brain ghrelin-induced visceral antinociception because orexin 1 receptor antagonist could significantly blocked the morphine-, levodopa- or ghrelin-induced visceral hyposensitivity. The orexin-induced visceral hyposensitivity was potently blocked by either dopamine D1 or D2 antagonist, adenoshine A1 antagonist or cannabinoid CB2 antagonist, suggesting that the dopaminergic, adenoshinergic or cannabinoid signaling may mediate the orexin-induced visceral antinociception.

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  • LPS,炎症性サイトカインと末梢CRF受容体サブタイプの消化管機能における相関

    2014.4 - 2018.3

    基盤研究(C)

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    最近我々は末梢corticotropin releasing factor (CRF)による胃運動の変化には,2種類のCRFサブタイプ受容体,すなわちCRF type 1受容体(CRF1),CRF type 2受容体(CRF2)のどちらかのみが関与するわけではなく,CRF1とCRF2の受容体-受容体相関が重要であることを見いだした.この新しい概念を念頭に本研究では意識下自由行動ラットで,lipopolysaccharide(LPS),炎症性サイトカインが消化管機能(運動,感覚)に与える影響と末梢CRFサブタイプ受容体の役割を明らかにすることを目的とした.これにより,脳腸相関とともに炎症が深く関与する機能性消化管障害(functional gastrointestinal disorders: FGIDs)の病態が明らかとなり,それを基にした新しい治療法の可能性を模索する.

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  • Mechanisms of postural control operated by the basal ganglia, brainstem and spinal cord

    Grant number:25290001  2013.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takakusaki Kaoru, OKUMURA Toshikatsu, NOZU Tsukasa, OBARA Kazuhiro, FUNAKOSHI Hiroshi, KOBAYASHI Kazuto

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    Grant amount:\17,680,000 ( Direct Cost: \13,600,000 、 Indirect Cost:\4,080,000 )

    The present study was designed to verify our hypothesis that an abnormal output from the basal ganglia to the brainstem-spinal cord causes posture-gait disturbance in basal ganglia disorders. For this purpose, we employed electrophysiological techniques combined with neuropharmacological assessments in decerebrate cats to examine how GABAergic output from the substantia nigra reticulata (SNr), one of the basal ganglia output nuclei, to the pedunculopontine tegmental nucleus (PPN) modulated activity descending brainstem-spinal cord motor pathways. Our results suggest that GABAergic SNr-PPN projection contribute to the posture-gait control by modulating the excitability of reticulospinal tract. Because the reticulospinal tract has dense connections with the vestibulospinal and monoaminergic tracts, the present results suggest that an abnormal activity in the SNr in basal ganglia motor disorders cause posture-gait disturbances by changing the excitability of brainstem-spinal cord systems.

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  • 神経ペプチドオレキシンの消化管運動調節機構とその意義

    2011.4 - 2014.3

    基盤研究(C)

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    神経ペプチドオレキシンの消化管運動調節機構の解明

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  • Relationship between sleep-awake cycle and gastrointestinal motility

    Grant number:23659391  2011.4 - 2013.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    OHHIRA Masumi, NOZU Tsukasa, OKUMURA Toshikatsu, TAKAKUSAKI Kaoru

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    Grant amount:\3,640,000 ( Direct Cost: \2,800,000 、 Indirect Cost:\840,000 )

    The present study was performed to clarify the relationship between sleep-awake cycle and gastrointestinal motility. We have successfully measured simultaneously gastric contractions, electroencephalogram, eye movement, and muscle tones in 2 freely moving conscious rats for a long time. To date, we do not obtain any significant relationship between gastric contractions and sleep-awake cycle analyzed by the monitors. To further study, we are trying to get data from additional rats.

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  • PPARγligandによる膵癌に対する抗腫瘍効果ー血管新生関連分子発現の解析ー

    2010.4 - 2013.3

    基盤研究(C)

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    PPARγligandによる膵癌に対する抗腫瘍効果ー血管新生関連分子発現の解析ー

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  • 秋山記念生命科学振興財団研究助成一般

    秋山記念生命科学振興財団 

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    Grant type:Competitive

    Grant amount:\1,000,000

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  • JGC研究奨励助成論文 奨励賞

    Japan Gut Club 

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    Grant type:Competitive

    Grant amount:\500,000

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  • JGC研究奨励助成論文 奨励賞

    Japan Gut Club 

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    Grant type:Competitive

    Grant amount:\500,000

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Social Activities

  • メディカルキャンプセミナー

    Role(s): Presenter, Lecturer, Planner, Organizing member

    北海道教育委員会  2024.8

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    Type:Seminar, workshop

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  • 柏葉meeting

    2024.7

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    地域医療にかんする講義

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  • 高校生による医療体験活動報告会・地域医療討論会

    2024.3

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  • メディカルキャンプセミナー

    2023.8

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    道教委主催の高校生向け地域医療セミナー

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  • 柏葉meeting

    2023.7

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    高校2年生対象の,地域医療関連の講義

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  • 高校生による医療体験活動報告会、地域医療討論会

    2023.3

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  • 札幌西高等学校探究授業

    2023.1

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    探究授業テーマ 地域医療
    に対する質疑・応答

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  • 第24回日本神経消化器病学会市民公開講座

    2022.9

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    テーマ;過敏性腸症候群—脳と腸の関係についてお話しします
    オンライン配信

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  • 高校生メディカル講座(釧路湖陵)

    2022.9

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  • メディカルキャンプセミナー

    2022.8

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  • 柏葉meeting

    2022.7

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    高校生に対する授業

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  • 第2回道東三域メディカル交流会

    2022.3

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    地域医療に関するGW

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  • 高校生による医療体験活動報告会、地域医療討論会

    2022.3

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  • 令和3年度高校生メディカル講座(釧路湖陵高校)

    2021.9

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  • 柏葉meeting

    2021.7

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    講演+討論 Zoom

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  • 第1回道東三域メディカル交流会

    2021.3

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    釧路湖陵高校、北見北斗高校、帯広柏葉高校の医学科を志す高校2年生による交流会

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  • 高校生による医療体験活動報告会、地域医療討論会

    2021.3

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  • 旭川龍谷高校派遣講座

    2019.9

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    旭川医大が目指す地域医療について講義

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  • 高校生による医療体験活動発表会

    2019.3

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  • 高校生による医療体験活動発表会

    2018.3

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    高校生による医療体験活動発表会でのfacilitator

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  • 足寄中学校3学年キャリア授業

    2017.11

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    地域医療とサイエンスのテーマで講演

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  • 足寄中学校PTA連合大会

    2017.11

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    地域医療とサイエンスのテーマで教育講演

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  • 高校生による医療体験活動発表会

    2017.3

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  • 高校生による医療体験活動発表会

    2016.3

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  • 高校生による医療体験活動発表会

    2015.3

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  • 高校生による医療体験活動発表会

    2014.3

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  • 派遣講座 高校生メディカル講座(釧路湖陵高等学校)

    2013.12

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    地域医療の現状 -旭川医大が目指す地域医療- 平成25年12月1日(日) 釧路市 北海道釧路湖陵高等学校

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  • 派遣講座 高校生メディカル講座(帯広柏葉高等学校)

    2013.11

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    地域医療の現状と旭川医大が目指す地域医療 平成25年11月3日(日) 帯広市 帯広柏葉高等学校

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  • 派遣講座 高校生メディカル講座(北見北斗高等学校)

    2013.9

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    地域医療の現状と旭川医大が目指す地域医療 平成25年9月22日(日) 北見市 北海道北見北斗高等学校

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  • 高校メディカルキャンプ

    2013.8

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  • 第3回高校生による地域医療討論会

    2013.3

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  • 十勝診療協議会ー旭川医大が目指す地域医療講演

    2013.3

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  • 派遣講座 「地域医療の現状-旭川医大が目指す地域医療-」 (帯広市)

    2012.11

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    「地域医療の現状-旭川医大が目指す地域医療-」(帯広市)24.11.18

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  • あさひかわオープンカレッジ

    2012.9

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    旭川医大が目指す地域医療講演

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  • 第2回高校生による地域医療討論会

    2012.3

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  • 派遣講座:地域医療の現状-旭川医大が目指す地域医療-

    2011.9

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  • 派遣講座:医師という仕事-これまでの歩みを振り返って-

    2011.9

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  • メディカルキャンプセミナー 旭川医大が目指す地域医療

    2011.8 - 2011.9

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Academic Activities

  • 日本内科学会生涯教育講演会Aセッション

    Role(s): Planning, management, etc., Panel moderator, session chair, etc.

    日本内科学会  2025.5

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    Type:Competition, symposium, etc. 

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  • 日本消化器病学会IBSガイドライン策定委員

    Role(s): Review, evaluation, Planning/Implementing academic research

    日本消化器病学会  2025.1

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    Type:Academic society, research group, etc. 

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  • 日本神経消化器病学会理事

    2023.11

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  • 日本内科学会生涯教育委員会委員 International contribution

    2023.1 - 2025.12

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  • 日本内科学会評議員 International contribution

    2022.4

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  • 日本内科学会認定医専門医試験症例要約査読委員

    2002.4

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