Neural Interaction of Gonadotropin-regulating Hormone Immunoreactive Neurons and the Suprachiasmatic Nucleus with the Paraventricular Organ in the Japanese Grass Lizard (Takydromus tachydromoides)(Endocrinology)

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概要

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• Our previous study demonstrated that the paraventricular organ (PVO) in the hypothalamus of the Japanese grass lizard (Takydromus tachydromoides) showed immunoreactivity against the light signal-transducing G-protein, transducin. This finding suggested that the PVO was a candidate for the deep-brain photoreceptor in this species. To understand functions of the PVO, we investigated distributions of transducin, serotonin, gonadotropin-releasing hormone (GnRH), and gonadotropininhibitory hormone (GnlH) in the lizard's brain. We immunohistochemically confirmed co-localization of transducin and serotonin in PVO neurons that showed structural characteristics of cerebrospinal fluid (CSF)-contacting neurons. GnRH-immunoreactive (ir) cells were localized in the posterior commissure and lateral hypothalamic area. Some of the serotonin-ir fibers extending from the PVO to the lateral hypothalamic area contacted the GnRH-ir cell bodies. GnlH-ir cells were localized in the nucleus accumbens, paraventricular nucleus, and upper medulla, and GnlH-ir fibers from the paraventricular nucleus contacted the lateral processes of serotonin-ir neurons in the PVO. In addition, we found that serotonin-ir fibers from the PVO extended to the suprachiasmatic nucleus (SCN), and the retrograde transport method confirmed the PVO projections to the SCN. These findings suggest that the PVO, by means of innervation mediated by serotonin, plays an important role in the regulation of pituitary function and the biological clock in the Japanese grass lizard.

• 社団法人日本動物学会の論文
• 2006-03-25

著者

• Tsutsui Kazuyoshi

  Laboratory of Brain Science, Faculty of Integrated Arts and Sciences, Hiroshima University

• Ukena Kazuyoshi

  Laboratory of Brain Science, Faculty of Integrated Arts and Sciences, Hiroshima University

• 筒井 和義

  広島大学総合科学研究科

• Tsutsui Kazuyoshi

  Laboratory Of Integrative Brain Sciences Department Of Biology Faculty Of Education And Integrated A

• Tsutsui Kazuyoshi

  富山大学 理学部

• Tsutsui Kazuyoshi

  Laboratory Of Integrative Brain Sciences Department Of Biology Faculty Of Education And Integrated A

• Ukena Kazuyoshi

  Laboratory Of Brain Science Faculty Of Integrated Arts And Sciences Hiroshima University And Integra

• Ukena Kazuyoshi

  富山大学 理学部

• Ukena K

  Department Of Biological Science Faculty Of Science Hiroshima University

• Ukena Kazuyoshi

  Laboratory Of Brain Science Faculty Of Integrated Arts And Science Hiroshima University

• 筒井 和義

  早稲田大学大学院先進理工学研究科生命理工学専攻統合脳科学

• Kobayashi Tetsuya

  Laboratory Of Integrative Brain Sciences Department Of Biology Faculty Of Education And Integrated A

• Tsutsui Kazuyoshi

  Laboratory Of Brain Science Faculty Of Integrated Arts And Science Hiroshima University

• TAMOTSU Satoshi

  Graduate School of Humanities and Science, Nara Women's University

• OISHI Tadashi

  Graduate School of Humanities and Science, Nara Women's University

• Kawano Emi

  Graduate School of Humanities and Sciences, Nara Women's University

• Takahata Yoko

  Department of Biological Sciences, Faculty of Science, Nara Women's University

• Kawano Emi

  Graduate School Of Humanities And Sciences Nara Women's University

• Takahata Yoko

  Department Of Biological Sciences Faculty Of Science Nara Women's University

• Oishi T

  Graduate School Of Humanities And Sciences Nara Women's University:department Of Biological Sci

• Oishi Tadashi

  Graduate School Of Human Culture Nara Women's University

• Tsutsui K

  Laboratory Of Integrative Brain Sciences Department Of Biology Faculty Of Education And Integrated A

• Tamotsu Satoshi

  Graduate School Of Humanities & Sciences Nara Women's University

• Tamotsu Satoshi

  Department Of Biological Science Nara Women's University

• Tamotsu Satoshi

  First Department Of Physiology Hamamatsu University School Of Medicine

• Ukena Kazuyoshi

  Laboratory Of Brain Science Faculty Of Integrated Arts And Sciences Hiroshima University:core Resear

• Tsutsui Kazuyoshi

  Laboratory Of Brain Science Faculty Of Integrated Arts And Sciences Hiroshima University:core Resear

• Tsutsui Kazuyoshi

  Laboratory Of Integrative Brain Science Department Of Biology Waseda University

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