Faculty Profiles - YOSHIMURA, Takashi

Papers - YOSHIMURA, Takashi

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Positional identification of a quantitative trait gene that controls "behavioral despair" in mice

Shigeru Tomida, Hirotake Sakamaki, Junya Kobayashi, Kuniya Abe, Tsutomu Kameyama, Takayoshi Mamiya, Akira Ishikawa, Takashi Yoshimura, Shizufumi Ebihara

NEUROSCIENCE RESEARCH Vol. 61 page： S70 - S70 2008

Molecular mechanisms of vertebrate photoperiodism

Shizufumi Ebihara, Shinobu Yasuo, Nobuhiro Nakao, Takashi Yoshimura

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY Vol. 148 ( 3 ) page： 338 - 338 2007.11

Temporal dynamics of type 2 deiodinase expression after melatonin injections in Syrian hamsters Open Access

Yasuo Shinobu, Yoshimura Takashi, Ebihara Shizufumi, Korf Horst-Werner

ENDOCRINOLOGY Vol. 148 ( 9 ) page： 4385 - 4392 2007.9

Photoperiodic changes in hypothalamic insulin receptor gene expression are regulated by gonadal testosterone

Anraku Tsubasa, Takagi Tsuyoshi, Nakao Nobuhiro, Watanabe Miwa, Yasuo Shinobu, Katou Yasuhiro, Ueda Yukihiro, Murai Atsushi, Ligo Masayuki, Ebihara Shizufumi, Yoshimura Takashi

BRAIN RESEARCH Vol. 1163 page： 86 - 90 2007.8

Circadian clock gene regulation of steroidogenic acute regulatory protein gene expression in preovulatory ovarian follicles

Nakao Nobuhiro, Yasuo Shinobu, Nishimura Atsuko, Yamamura Takashi, Watanabe Tsuyoshi, Anraku Tsubasa, Okano Toshiyuki, Fukada Yoshitaka, Sharp Peter J., Ebihara Shizufumi, Yoshimura Takashi

ENDOCRINOLOGY Vol. 148 ( 7 ) page： 3031 - 3038 2007.7

Molecular evolution of prepro-thyrotropin-releasing hormone in the chicken (Gallus gallus) and its expression in the brain Reviewed

Aoki, Y., Ono, H., Yasuo, S., Masuda, T., Yoshimura, T., Ebihara, S., Iigo, M., Yanagisawa, T.

Zoological Science Vol. 24 ( 7 ) page： 686 - 692 2007.7

Involvement of transforming growth factor alpha in the photoperiodic regulation of reproduction in birds Open Access

Takagi Tsuyoshi, Yamamura Takashi, Anraku Tsubasa, Yasuo Shinobu, Nakao Nobuhiro, Watanabe Miwa, Iigo Masayuki, Ebihara Shizufumi, Yoshimura Takashi

ENDOCRINOLOGY Vol. 148 ( 6 ) page： 2788 - 2792 2007.6

Bimodal clock gene expression in mouse suprachiasmatic nucleus and peripheral tissues under a 7-hour light and 5-hour dark schedule. Reviewed

Watanabe T, Naito E, Nakao N, Tei H, Yoshimura T, Ebihara S

Journal of biological rhythms Vol. 22 ( 1 ) page： 58 - 68 2007.2

時計遺伝子の進化 Invited

吉村崇, 海老原史樹文

生体の科学 Vol. 57 page： 440-441 2007

Photoperiodic changes in hypothalamic insulin receptor gene expression are regulated by gonadal testosterone Reviewed

Vol. 1163 page： 86-90 2007

Temporal dynamics of type 2 deiodinase expression after melatonin injections in Syrian hamsters Reviewed Open Access

Yasuo S, Yoshimura T, Ebihara S, Korf HW

Endocrinology Vol. 148 page： 4385-4392 2007

Involvement of transforming growth factor alpha in the photoperiodic regulation of reproduction in birds. Reviewed Open Access

Takagi T, Yamamura T, Anraku T, Yasuo S, Nakao N, Watanabe M, Iigo M, Ebihara S, Yoshimura T

Endocrinology Vol. 148 page： 2788-2792 2007

Differential response of type 2 deiodinase gene expression to photoperiod between photoperiodic F344 and nonphotoperiodic Wistar rats Reviewed

Yasuo S, Watanabe M, Iigo M, Nakamura TJ, Watanabe T, Takagi T, Ono H, Ebihara S, Yoshimura T

American Journal of Physiology Vol. 292 page： R1315-R1319 2007

Hypothalamic expression of thyroid hormone-activating and -inactivating enzyme genes in relation to photorefractoriness in birds and mammals Reviewed

Watanabe T, Yamamura T, Watanabe M, Yasuo S, Nakao N, Dawson A, Ebihara S, Yoshimura T

American Journal of Physiology Vol. 292 page： R568-R572 2007

Photoperiodic regulation of seasonal reproduction in birds

T. Yoshimura, S. Yasuo, N. Nakao, T. Yamamura, S. Ebihara

JOURNAL OF ORNITHOLOGY Vol. 147 ( 5 ) page： 65 - 65 2006.8

Overview of avian circadian system

Ebihara S., Yasuo S., Tada A., Yoshimura T.

JOURNAL OF ORNITHOLOGY Vol. 147 ( 5 ) page： 64 - 65 2006.8

Reciprocal switching of type 2 and type 3 deiodinase genes triggers photoperiodic gonadal response in Japanese Quail

S. Yasuo, M. Watanabe, N. Nakao, T. Takagi, S. Ebihara, T. Yoshimura

JOURNAL OF ORNITHOLOGY Vol. 147 ( 5 ) page： 276 - 277 2006.8

Molecular mechanism of the photoperiodic response of gonads in birds and mammals

T Yoshimura

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY Vol. 144 ( 3 ) page： 345 - 350 2006.7

Language：English Publisher：ELSEVIER SCIENCE INC

Appropriate timing of various seasonal processes is crucial to the survival and reproductive success of animals living in temperate regions. When seasonally breeding animals are subjected to annual changes in day length, dramatic changes in neuroendocrine-gonadal activity take place. However, the molecular mechanism underlying the photoperiodic response of gonads remains unknown for all living organisms. It is well known that a circadian clock is somehow involved in the regulation of photoperiodism. Recently, rhythmic expression of circadian clock genes was observed in the mediobasal hypothalamus (MBH) of Japanese quail. The MBH is believed to be the center for photoperiodism. In addition, long-day-induced hormone conversion of the prohormone thyroxine (T-4) to the bioactive triiodothyronine (T-3) by deiodinase in the MBH has been proven to be important to the photoperiodic response of the gonads. Although the regulating mechanism for the photoperiodic response of gonads in birds and mammals has long been considered to be quite different, the long-day-induced expression of the deiodinase gene in the hamster hypothalamus suggests the existence of a conserved regulatory mechanism in avian and mammalian photoperiodism. (c) 2005 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.cbpa.2005.09.009

Web of Science

Scopus

T<sub>3</sub> implantation mimics photoperiodically reduced encasement of nerve terminals by glial processes in the median eminence of Japanese quail

Yamamura T, Yasuo S, Hirunagi K, Ebihara S, Yoshimura T

CELL AND TISSUE RESEARCH Vol. 324 ( 1 ) page： 175 - 179 2006.4

Publisher：Cell and Tissue Research

Photoperiodically generated triiodothyronin (T3) in the mediobasal hypothalamus (MBH) has critical roles in the photoperiodic response of the gonads in Japanese quail. In a previous study, we demonstrated seasonal morphological changes in the neuro-glial interaction between gonadotrophin-releasing hormone (GnRH) nerve terminals and glial endfeet in the median eminence (ME). However, a direct relationship between photoperiodically generated T3 and seasonal neuro-glial plasticity in the ME remained unclear. In the present study, we examined the effect of T3 implantation into the MBH on the neuro-glial interaction in the ME. T 3 implantation caused testicular growth and reduced encasement of nerve terminals in the external zone of the ME. In contrast, no morphological changes were observed in birds given an excessive dose of T3, which did not cause testicular growth. These results support the hypothesis that thyroid hormone regulates photoperiodic GnRH secretion via neuro-glial plasticity in the ME. © Springer-Verlag 2006.

DOI： 10.1007/s00441-005-0126-8

Web of Science

Scopus

Peripheral clock gene expression in CS mice with bimodal locomotor rhythms. Reviewed

Watanabe T, Kojima M, Tomida S, Nakamura TJ, Yamamura T, Nakao N, Yasuo S, Yoshimura T, Ebihara S

Neuroscience research Vol. 54 ( 4 ) page： 295 - 301 2006.4

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Papers - YOSHIMURA, Takashi