Name Position
Shiro Minami Graduate School Professor
Chitose Orikasa Associate Professor
Yuka Toyoshima Senior Assistant Professor
Tomoko Nakata Assistant Professor
Harumi Katsumata Management Support Staff
Reiko Tokita Technical Staff
Yoko Kato Post-doctoral Fellow
Hiroyuki Yano Graduate Student
Kanako Oki Research Assistant
Nobuchika Suzuki Research Fellow
Kayoko Fujii Research Fellow
Ruriko Suzuki Research Fellow
Akiko Otsuki Research Fellow
Mayumi Ishikawa Clinical Assistant Professor, Nippon Medical School Musashikosugi Hospital
Takashi Yagi Assistant Professor, Nippon Medical School Musashikosugi Hospital

Research Interests

     The regulatory systems to maintain homeostasis are the basis of the creature on the earth, organized so mysteriously, which we, researchers for biology and medicine, are charmed and trapped to participate in. We are interested in the cellular mechanisms to adapt the changes of nutritional status, and in the central regulatory mechanisms of animal behavior to adapt the changes of their social environment. We are doing animal experiments, focusing on the actions, regulations, signaling, and pathophysiological significances of hormones. The subjects of our current research are as follows;

  • ・Neuronal basis of parental behavior in male mice
  • ・Significance of insulin signaling for changes of nutritional status
  • ・Physiological roles of insulin receptor substrate-1 and -2 in rats

・Impact of growth hormone on glucose and lipid metabolism in relation with ER stress

Selected papers

Horiuchi M, Takeda T, Takanashi H, Ozaki-Masuzawa Y, Taguchi Y, Toyoshima Y, Otani L, Kato H, Sone-Yonezawa M, Hakuno F, Takahashi S, Takenaka A. Branched-chain amino aid supplementation restores reduced insulinotropic activity of a low-protein diet throgh the vagus nerve in rats. Nutr Metab (Lond). 2017 Sep 15; 14:59.

Taguchi Y, Toyoshima Y, Tokita R, Kato H, Takahashi S, Minami S. Triglyceride synthesis in hepatocytes isolated from rats fed a low-protein diet is enhanced independently of upregulation of insulin signaling. Biochem Biophys Res Commun. 2017 Aug 26; 490(3):800-805

Orikasa C, Kondo Y, Katsumata H, Terada M, Akimoto T, Sakuma Y, Minami S. Vomeronasal signal deficiency enhances parental behavior in socially isolated male mice. Physiol Behav. 2017 Jan 1; 168:98-102.

Orikasa C, Nagaoka K, Katsumata H, Sato M, Kondo Y, Minami S, Sakuma Y. Social isolation prompts maternal behavior in sexually naïve male ddN mice. Physiol Behav. 2015 Nov 1; 151:9-15.

Fukushima M, Okamoto Y, Katsumata H, Ishikawa M, Ishii S, Okamoto M, Minami S. Growth hormone ameliorates adipose dysfunction during oxidative stress and inflammation and improves glucose tolerance in obese mice. Horm Metab Res. 2014 Aug;46 (9):656-662.

Toyoshima Y, Tokita R, Taguchi Y, Akiyama-Akanishi N, Takenaka A, Kato H, Chida K, Hakuno F, Minami S, Takahashi S. Tissue-specific effects of protein malnutrition on insulin signaling pathway and lipid accumulation in growing rats. Endocr J. 2014 May 31;61(5):499-512.

Ishikawa M, Tachibana T, Hashimoto H, Toyomura J, Ito T, Tsuboi K, Shibuya K, Hirose T, Minami S, Yoshino G. Functional analysis of three novel cell lines derived from human papillary thyroid carcinomas with three different clinical courses. Hum Cell. 2014 Feb 25. [Epub ahead of print]

Kaneko M, Hakuno F, Kamei H, Yamanaka D, Chida K, Minami S, Coe IR, Takahashi S. Steroid hormones are novel nucleoside transport inhibitors by competition with nucleosides for their transporters. Biochem Biophys Res Commun. 2014 Jan 10;443(2):505-510.

Ishii S, Okamoto Y, Katsumata H, Egawa S, Yamanaka D, Fukushima M, Minami S. Sunitinib, a small-molecule receptor tyrosine kinase inhibitor, suppresses neointimal hyperplasia in balloon-injured rat carotid artery. J Cardiovasc Pharmacol Ther. 2013 Jul;18(4):359-366.

Okamoto Y, Ishii So, Croce K, Katsumata H, Fukushima M, Kihara S, Libby P, Minami S. Adiponectin inhibits macrophage tissue factor, a key trigger of thrombosis in disrupted atherosclerotic plaques. Atherosclerosis. 2013 Feb;226(2):373-377.

Fukushima T, Nakamura Y, Yamanaka D, Shibano T, Chida K, Minami S, Asano T, Hakuno F, Takahashi S. Phosphatidylinositol 3-Kinase (PI3K) activity bound to insulin-like growth factor-I (IGF-I) receptor, which is continuously sustained by IGF-I stimulation, is required for IGF-I-induced cell proliferation. J Biol Chem. 2012 Aug 24;287(35):29713-29721.

Yamanaka D, Akama T, Fukushima T, Nedachi T, Kawasaki C, Chida K, Minami S, Suzuki K, Hakuno F, Takahashi S. Phosphatidylinositol 3-kinase-binding protein, PITKAP/XB130, is required for cAMP-induced amplification of IGF mitogenic activity in FRTL-5 thyroid cells. Mol Endocrinol. 2012 Jun 26(6):1043-1055.

Okamoto Y. Adiponectin provides cardiovascular protection in metabolic syndrome. Cardiol Res Pract. 2011 Jan 23;2011:313179.

Barclay JL, Nelson CN, Ishikawa M, Murray LA, Kerr LM, McPhee TR, Powell EE, Waters MJ. GH-dependent STAT5 signaling plays an important role in hepatic lipid metabolism. Endocrinology. 2011 Jan;152(1):181-192.

Cha P-C, Mushiroda T, Takahashi A, Kubo M, Minami S, Kamatani N, Nakamura Y. Genome-wide association study identifies genetic determinants of warfarin responsiveness for Japanese. Hum Mol Genet. 2010 Dec 1;19(23):4735-4744.

Toyoshima Y, Tokita R, Ohne Y, Hakuno F, Noguchi T, Minami S, Kato H, Takahashi S. Dietary protein deprivation upregulates insulin signaling and inhibits gluconeogenesis in rat liver. J Mol Endocrinol. 2010 Nov;45(5):329-340.

Ishikawa M, Tachibana T, Yoshino G, Hashimoto H, Tanaka T. Novel functional hepatocyte cell line derived from spontaneous dwarf rat: model of growth hormone function in vitro. Hum Cell. 2010 Nov;23(4):164-172.

Orikasa C, Sakuma Y. Estrogen configures sexual dimorphism in the preoptic area of C57BL/6J and ddN strains of mice. J Comp Neurol. 2010 Sep 1;518(17):3618-3629.

Orikasa C, Kondo Y, Usui S, Sakuma Y. Similar numbers of neurons are generated in the male and female rat preoptic area in utero. Neurosci Res. 2010 Sep;68(1):9-14.

Osaka M, Tokita R, Minami S. Volley-like male GH secretion indicates exsistance of an intrinsic 1-h oscillator in the hypothalamus. Applied Mathematical and Computational Sciencs. 2010;1(2):225-242.

Toyoshima Y, Tokita R, Hakuno F, Kato H, Minami S, Takahashi SI. Suppression of insulin signaling in white adipose tissues contributes to preferential lipid accumulation in rat liver under protein malnutrition. Growth Horm IGF Res. 2010;20 S22-23.

Sue M, Yoshihara A, Okubo Y, Ishikawa M, Ando Y, Hiroi N, Shibuya K, Yoshino G. A case of juvenile acromegaly that was initially diagnosed as severe congestive heart failure from acromegaly-induced dilated cardiomyopathy. Intern Med. 2010;49(19):2117-2121.

Shibata M, Hakuno F, Yamanaka D, Okajima H, Fukushima T, Hasegawa T, Ogata T, Toyoshima Y, Chida K, Kimura K, Sakoda H, Takenaka A, Asano T, Takahashi S. Paraquat-induced oxidative stress represses phosphatidylinositol 3-kinase activities leading to impaired glucose uptake in 3T3-L1 adipocytes. J Biol Chem. 2010 Jul 2;285(27):20915-20925.

Ishikawa M , Kimura K , Tachibana T, Hashimoto H, Shimojo M, Ueshiba H, Tsuboi K, Shibuya K, Yoshino  Establishment and characterization of a novel cell line derived from a human small cell lung carcinoma that secretes PTH, PTH-related protein, and pro-opiomelanocortin. Hum Cell. 2010 May;23(2):58-64.

Libby P, Okamoto Y, Rocha VZ, Folco E. Inflammation in atherosclerosis: transition from theory to practice. Circ J. 2010;74(2):213-220.

Barclay JL, Kerr LM, Arthur L, Rowland JE, Nelson CN, Ishikawa M, d'Aniello EM, White M, Noakes PG, Waters MJ. In vivo targeting of the growth hormone receptor (GHR) Box1 sequence demonstrates that the GHR does not signal exclusively through JAK2. Mol Endocrinol. 2010 Jan;24(1):204-217.