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Tohru Kobayashi

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Masatoshi Nakamoto; Kazusuke Shimamori; Aya Suzuki; Satomi Tanaka; Motoaki Fukasawa; Tohru Kobayashi; Masaru Matsuda; Yoshitaka Nagahama; Naoki Shibata
Expression of 3β-hydroxysteroid dehydrogenase (hsd3b), star and ad4bp/sf-1 during gonadal development in medaka (Oryzias latipes).
Ryosuke Murata; Kiyoshi Soyano; Ryo Horiguchi; Hirofumi Karimata; Motofumi Kimura; Kazuo Kishimoto; Tohru Kobayashi; Yasuhisa Kobayashi; Masaru Nakamura
Differentiation of steroid-producing cells during ovarian differentiation in the protogynous Malabar grouper, Epinephelus malabaricus.
De-Shou Wang; Lin-Yan Zhou; Tohru Kobayashi; Masaru Matsuda; Yasushi Shibata; Fumie Sakai; Yoshitaka Nagahama
Doublesex- and Mab-3-related transcription factor-1 repression of aromatase transcription, a possible mechanism favoring the male pathway in tilapia.

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All Publications

2012: Masatoshi Nakamoto; Kazusuke Shimamori; Aya Suzuki; Satomi Tanaka; Motoaki Fukasawa; Tohru Kobayashi; Masaru Matsuda; Yoshitaka Nagahama; Naoki Shibata
Expression of 3β-hydroxysteroid dehydrogenase (hsd3b), star and ad4bp/sf-1 during gonadal development in medaka (Oryzias latipes).
General and comparative endocrinology 2012;176(2):222-30.
2011: Ryosuke Murata; Kiyoshi Soyano; Ryo Horiguchi; Hirofumi Karimata; Motofumi Kimura; Kazuo Kishimoto; Tohru Kobayashi; Yasuhisa Kobayashi; Masaru Nakamura
Differentiation of steroid-producing cells during ovarian differentiation in the protogynous Malabar grouper, Epinephelus malabaricus.
The International journal of developmental biology 2011;55(6):619-25.
2010: De-Shou Wang; Lin-Yan Zhou; Tohru Kobayashi; Masaru Matsuda; Yasushi Shibata; Fumie Sakai; Yoshitaka Nagahama
Doublesex- and Mab-3-related transcription factor-1 repression of aromatase transcription, a possible mechanism favoring the male pathway in tilapia.
Endocrinology 2010;151(3):1331-40.
2010: Wei-Li Zhang; Lin-Yan Zhou; Balasubramanian Senthilkumaran; Bao-Feng Huang; Cheni Chery Sudhakumari; Tohru Kobayashi; Yoshitaka Nagahama; De-Shou Wang
Molecular cloning of two isoforms of 11beta-hydroxylase and their expressions in the Nile tilapia, Oreochromis niloticus.
General and comparative endocrinology 2010;165(1):34-41.
2009: Yasuhisa Kobayashi; Masaru Nakamura; Tomoki Sunobe; Takeshi Usami; Tohru Kobayashi; Hisaya Manabe; Bindhu Paul-Prasanth; Norio Suzuki; Yoshitaka Nagahama
Sex change in the Gobiid fish is mediated through rapid switching of gonadotropin receptors from ovarian to testicular portion or vice versa.
Endocrinology 2009;150(3):1503-11.
2009: Balasubramanian Senthilkumaran; Cheni Chery Sudhakumari; De-Shou Wang; G Sreenivasulu; Tohru Kobayashi; H-K Kobayashi; Michiyasu Yoshikuni; Yoshitaka Nagahama
Novel 3beta-hydroxysteroid dehydrogenases from gonads of the Nile tilapia: phylogenetic significance and expression during reproductive cycle.
Molecular and cellular endocrinology 2009;299(2):146-52.
2008: Yoh Matsuoka; Tohru Kobayashi; Kazunori Kihara; Yoshitaka Nagahama
Molecular cloning of Plk1 and Nek2 and their expression in mature gonads of the teleost fish Nile tilapia (Oreochromis niloticus).
Molecular reproduction and development 2008;75(6):989-1001.
2008: Shigeho Ijiri; Hiroyo Kaneko; Tohru Kobayashi; De-Shou Wang; Fumie Sakai; Bindhu Paul-Prasanth; Masaru Nakamura; Yoshitaka Nagahama
Sexual dimorphic expression of genes in gonads during early differentiation of a teleost fish, the Nile tilapia Oreochromis niloticus.
Biology of reproduction 2008;78(2):333-41.
2008: Tohru Kobayashi; Hiroko Kajiura-Kobayashi; Guijun Guan; Yoshitaka Nagahama
Sexual dimorphic expression of DMRT1 and Sox9a during gonadal differentiation and hormone-induced sex reversal in the teleost fish Nile tilapia (Oreochromis niloticus).
Developmental dynamics : an official publication of the American Association of Anatomists 2008;237(1):297-306.
2007: Lin-Yan Zhou; De-Shou Wang; Tohru Kobayashi; Akihiro Yano; Bindhu Paul-Prasanth; Aya Suzuki; Fumie Sakai; Yoshitaka Nagahama
A novel type of P450c17 lacking the lyase activity is responsible for C21-steroid biosynthesis in the fish ovary and head kidney.
Endocrinology 2007;148(9):4282-91.
2007: Masaru Matsuda; Ai Shinomiya; Masato Kinoshita; Aya Suzuki; Tohru Kobayashi; Bindhu Paul-Prasanth; En-lieng Lau; Satoshi Hamaguchi; Mitsuru Sakaizumi; Yoshitaka Nagahama
DMY gene induces male development in genetically female (XX) medaka fish.
Proceedings of the National Academy of Sciences of the United States of America 2007;104(10):3865-70.
2007: De-Shou Wang; Tohru Kobayashi; Lin-Yan Zhou; Bindhu Paul-Prasanth; Shigeho Ijiri; Fumie Sakai; Kataaki Okubo; Ken-ichirou Morohashi; Yoshitaka Nagahama
Foxl2 up-regulates aromatase gene transcription in a female-specific manner by binding to the promoter as well as interacting with ad4 binding protein/steroidogenic factor 1.
Molecular endocrinology (Baltimore, Md.) 2007;21(3):712-25.
2006: Bindhu Paul-Prasanth; Masaru Matsuda; En-lieng Lau; Aya Suzuki; Fumie Sakai; Tohru Kobayashi; Yoshitaka Nagahama
Knock-down of DMY initiates female pathway in the genetic male medaka, Oryzias latipes.
Biochemical and biophysical research communications 2006;351(4):815-9.
2005: Lin-Yan Zhou; De-Shou Wang; Balasubramanian Senthilkumaran; Michiyasu Yoshikuni; Yasushi Shibata; Tohru Kobayashi; Cheni Chery Sudhakumari; Yoshitaka Nagahama
Cloning, expression and characterization of three types of 17beta-hydroxysteroid dehydrogenases from the Nile tilapia, Oreochromis niloticus.
Journal of molecular endocrinology 2005;35(1):103-16.
2005: De-Shou Wang; Balasubramanian Senthilkumaran; Cheni Chery Sudhakumari; Fumie Sakai; Masaru Matsuda; Tohru Kobayashi; Michiyasu Yoshikuni; Yoshitaka Nagahama
Molecular cloning, gene expression and characterization of the third estrogen receptor of the Nile tilapia, Oreochromis niloticus.
Fish physiology and biochemistry 2005;31(2-3):255-66.
2005: Fumie Sakai; I Swapna; Cheni Chery Sudhakumari; M V N L Ganesh; H Kagawa; Tohru Kobayashi; H Fan; Yoshitaka Nagahama; Balasubramanian Senthilkumaran
Immunocytochemical localization of gonadotropins during the development of XX and XY Nile tilapia.
Fish physiology and biochemistry 2005;31(2-3):177-81.
2005: Cheni Chery Sudhakumari; Balasubramanian Senthilkumaran; Tohru Kobayashi; Hiroko Kajiura-Kobayashi; De-Shou Wang; Michiyasu Yoshikuni; Yoshitaka Nagahama
Ontogenic expression patterns of several nuclear receptors and cytochrome P450 aromatases in brain and gonads of the Nile tilapia Oreochromis niloticus suggests their involvement in sex differentiation.
Fish physiology and biochemistry 2005;31(2-3):129-35.
2005: Yasuhisa Kobayashi; Tomoki Sunobe; Tohru Kobayashi; Yoshitaka Nagahama; Masaru Nakamura
Promoter analysis of two aromatase genes in the serial-sex changing gobiid fish, Trimma okinawae.
Fish physiology and biochemistry 2005;31(2-3):123-7.
2005: Hiroko Kajiura-Kobayashi; Tohru Kobayashi; Yoshitaka Nagahama
Cloning of cDNAs and the differential expression of A-type cyclins and Dmc1 during spermatogenesis in the Japanese eel, a teleost fish.
Developmental dynamics : an official publication of the American Association of Anatomists 2005;232(4):1115-23.
2004: Tohru Kobayashi; Masaru Matsuda; Hiroko Kajiura-Kobayashi; Aya Suzuki; Noriko Saito; Masatoshi Nakamoto; Naoki Shibata; Yoshitaka Nagahama
Two DM domain genes, DMY and DMRT1, involved in testicular differentiation and development in the medaka, Oryzias latipes.
Developmental dynamics : an official publication of the American Association of Anatomists 2004;231(3):518-26.
2004: Hiroko Kajiura-Kobayashi; Tohru Kobayashi; Yoshitaka Nagahama
The cloning of cyclin B3 and its gene expression during hormonally induced spermatogenesis in the teleost, Anguilla japonica.
Biochemical and biophysical research communications 2004;323(1):288-92.
2004: Deshou Wang; Tohru Kobayashi; Linyan Zhou; Yoshitaka Nagahama
Molecular cloning and gene expression of Foxl2 in the Nile tilapia, Oreochromis niloticus.
Biochemical and biophysical research communications 2004;320(1):83-9.
2003: J Q Jiang; De-Shou Wang; Balasubramanian Senthilkumaran; Tohru Kobayashi; H K Kobayashi; A Yamaguchi; W Ge; G Young; Yoshitaka Nagahama
Isolation, characterization and expression of 11beta-hydroxysteroid dehydrogenase type 2 cDNAs from the testes of Japanese eel (Anguilla japonica) and Nile tilapia (Oreochromis niloticus).
Journal of molecular endocrinology 2003;31(2):305-15.
2003: Yasutoshi Yoshiura; Balasubramanian Senthilkumaran; Masatada Watanabe; Yuichi Oba; Tohru Kobayashi; Yoshitaka Nagahama
Synergistic expression of Ad4BP/SF-1 and cytochrome P-450 aromatase (ovarian type) in the ovary of Nile tilapia, Oreochromis niloticus, during vitellogenesis suggests transcriptional interaction.
Biology of reproduction 2003;68(5):1545-53.
2003: Tohru Kobayashi; Hiroko Kajiura-Kobayashi; Yoshitaka Nagahama
Induction of XY sex reversal by estrogen involves altered gene expression in a teleost, tilapia.
Cytogenetic and genome research 2003;101(3-4):289-94.
2002: Balasubramanian Senthilkumaran; Cheni Chery Sudhakumari; Xiao-Tian Chang; Tohru Kobayashi; Yuichi Oba; Guijun Guan; Yasutoshi Yoshiura; Michiyasu Yoshikuni; Yoshitaka Nagahama
Ovarian carbonyl reductase-like 20beta-hydroxysteroid dehydrogenase shows distinct surge in messenger RNA expression during natural and gonadotropin-induced meiotic maturation in nile tilapia.
Biology of reproduction 2002;67(4):1080-6.
2002: De-Shou Wang; Tohru Kobayashi; Balasubramanian Senthilkumaran; Fumie Sakai; Cheni Chery Sudhakumari; Taiga Suzuki; Michiyasu Yoshikuni; Masaru Matsuda; Ken-ichirou Morohashi; Yoshitaka Nagahama
Molecular cloning of DAX1 and SHP cDNAs and their expression patterns in the Nile tilapia, Oreochromis niloticus.
Biochemical and biophysical research communications 2002;297(3):632-40.
2002: Masaru Matsuda; Yoshitaka Nagahama; Ai Shinomiya; Tadashi Sato; Chika Matsuda; Tohru Kobayashi; Craig E Morrey; Naoki Shibata; Shuichi Asakawa; Nobuyoshi Shimizu; Hiroshi Hori; Satoshi Hamaguchi; Mitsuru Sakaizumi
DMY is a Y-specific DM-domain gene required for male development in the medaka fish.
Nature 2002;417(6888):559-63.
2002: Tohru Kobayashi; Hiroko Kajiura-Kobayashi; Yoshitaka Nagahama
Two isoforms of vasa homologs in a teleost fish: their differential expression during germ cell differentiation.
Mechanisms of development 2002;111(1-2):167-71.
2002: Toshitaka Ikeuchi; Takashi Todo; Tohru Kobayashi; Yoshitaka Nagahama
A novel progestogen receptor subtype in the Japanese eel, Anguilla japonica.
FEBS letters 2002;510(1-2):77-82.
2001: Toshitaka Ikeuchi; Takashi Todo; Tohru Kobayashi; Yoshitaka Nagahama
Two subtypes of androgen and progestogen receptors in fish testes.
Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology 2001;129(2-3):449-55.
2001: Yuichi Oba; T Hirai; Yasutoshi Yoshiura; Tohru Kobayashi; Yoshitaka Nagahama
Fish gonadotropin and thyrotropin receptors: the evolution of glycoprotein hormone receptors in vertebrates.
Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology 2001;129(2-3):441-8.
2000: Tohru Kobayashi; Hiroko Kajiura-Kobayashi; Yoshitaka Nagahama
Differential expression of vasa homologue gene in the germ cells during oogenesis and spermatogenesis in a teleost fish, tilapia, Oreochromis niloticus.
Mechanisms of development 2000;99(1-2):139-42.
2000: Yuichi Oba; T Hirai; Yasutoshi Yoshiura; Tohru Kobayashi; Yoshitaka Nagahama
Cloning, functional characterization, and expression of thyrotropin receptors in the thyroid of amago salmon (Oncorhynchus rhodurus).
Biochemical and biophysical research communications 2000;276(1):258-63.
2000: Ai Shinomiya; M Tanaka; Tohru Kobayashi; Yoshitaka Nagahama; Satoshi Hamaguchi
The vasa-like gene, olvas, identifies the migration path of primordial germ cells during embryonic body formation stage in the medaka, Oryzias latipes.
Development, growth & differentiation 2000;42(4):317-26.
2000: Guijun Guan; Tohru Kobayashi; Yoshitaka Nagahama
Sexually dimorphic expression of two types of DM (Doublesex/Mab-3)-domain genes in a teleost fish, the Tilapia (Oreochromis niloticus).
Biochemical and biophysical research communications 2000;272(3):662-6.
2000: Takashi Todo; Toshitaka Ikeuchi; Tohru Kobayashi; Hiroko Kajiura-Kobayashi; K Suzuki; Michiyasu Yoshikuni; K Yamauchi; Yoshitaka Nagahama
Characterization of a testicular 17alpha, 20beta-dihydroxy-4-pregnen-3-one (a spermiation-inducing steroid in fish) receptor from a teleost, Japanese eel (Anguilla japonica).
FEBS letters 2000;465(1):12-7.
1999: Toshitaka Ikeuchi; Takashi Todo; Tohru Kobayashi; Yoshitaka Nagahama
cDNA cloning of a novel androgen receptor subtype.
The Journal of biological chemistry 1999;274(36):25205-9.
1999: Takashi Todo; Toshitaka Ikeuchi; Tohru Kobayashi; Yoshitaka Nagahama
Fish androgen receptor: cDNA cloning, steroid activation of transcription in transfected mammalian cells, and tissue mRNA levels.
Biochemical and biophysical research communications 1999;254(2):378-83.
1998: Tohru Kobayashi; Hiroko Kajiura-Kobayashi; Yoshitaka Nagahama
A novel stage-specific antigen is expressed only in early stages of spermatogonia in Japanese eel, Anguilla japonica testis.
Molecular reproduction and development 1998;51(4):355-61.
1998: J Q Jiang; G Young; Tohru Kobayashi; Yoshitaka Nagahama
Eel (Anguilla japonica) testis 11beta-hydroxylase gene is expressed in interrenal tissue and its product lacks aldosterone synthesizing activity.
Molecular and cellular endocrinology 1998;146(1-2):207-11.
1998: Craig E Morrey; M Nakamura; Tohru Kobayashi; E Gordon Grau; Yoshitaka Nagahama
P450scc-like immunoreactivity throughout gonadal restructuring in the protogynous hermaphrodite Thalassoma duperrey.
The International journal of developmental biology 1998;42(6):811-6.
1998: Tohru Kobayashi; Masaru Nakamura; Hiroko Kajiura-Kobayashi; G Young; Yoshitaka Nagahama
Immunolocalization of steroidogenic enzymes (P450scc, P450c17, P450arom, and 3beta-HSD) in immature and mature testes of rainbow trout (Oncorhynchus mykiss).
Cell and tissue research 1998;292(3):573-7.
1998: Tohru Kobayashi
[Mechanism of gonadal differentiation and spermatogenesis in teleost].
Tanpakushitsu kakusan koso. Protein, nucleic acid, enzyme 1998;43(4):438-45.
1997: X T Chang; Tohru Kobayashi; H Kajiura; Masaru Nakamura; Yoshitaka Nagahama
Isolation and characterization of the cDNA encoding the tilapia (Oreochromis niloticus) cytochrome P450 aromatase (P450arom): changes in P450arom mRNA, protein and enzyme activity in ovarian follicles during oogenesis.
Journal of molecular endocrinology 1997;18(1):57-66.
1996: J Q Jiang; Tohru Kobayashi; W Ge; H Kobayashi; M Tanaka; M Okamoto; Y Nonaka; Yoshitaka Nagahama
Fish testicular 11beta-hydroxylase: cDNA cloning and mRNA expression during spermatogenesis.
FEBS letters 1996;397(2-3):250-2.