1995 Fiscal Year Final Research Report Summary
Immuno-electron microscopic alalysis of brain photoreceptor in birds.
| Project/Area Number |
06806035
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Basic veterinary science/Basic zootechnical science
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| Research Institution | Nagoya University |
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Principal Investigator |
HIRUNAGI Kanjun Nagoya Univ., Agricultural Sciences, Asso.Prof., 農学部, 助教授 (00126898)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Thoru Nagoya Univ., Agricultural Sciences, Pfor., 農学部, 教授 (30023427)
EBIHARA Shizufumi Nagoya Univ., Agricultural Sciences, Asso.Prof., 農学部, 助教授 (50135331)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Pigeon / VIP neuron / GnRH neuron / Deep brain photoreceptor / Lateral septum / Immunoelectron microscopy |
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| Research Abstract |
In the lateral septum of the avian brain, the presence of vasoactive intestinal polypeptide (VIP) -and gonadotrophin releasing hormone (GnRH) -containing neurons has been reported. An accumulation of VIP-like immunoreactive (ir) neurons is found in the area adjacent to the lateral ventricles which is called pars medialis of lateral septal organ (LSOm) and many of them displayd the characteristic features of CSF-contacting neurons. Recently, this type of neuron is considered as a candidate of deep brain photoreceptor in birds. GnRH-ir neurons are located in the deeper layr of LSOm. In the present study, we used double-labeling techniques at the light (LM) and electron-microscopic (EM) levels to investigate whether VIP-and GnRH-ir neurons communicate in the lateral septum of the pigeon. At the LM levels, VIP-ir neurons and GnRH-ir neurons were seen in close association and some VIP-ir fibers ran near GnRH-ir cell bodies. Examination of these neurons at the EM revealed that VIP-ir axon terminals had synaptoid contacts with perikarya and dendrite of GnRH-ir neurons. These results suggest that VIP neurons could communicate directly with GnRH neurons in the lateral septum of the pigeon and this area might play an important role for reproductive phenomena.
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[Publications] Hirunagi,K.,Kiyoshi,K.,Adachi,A.,Hasegawa,M.,Ebihara,S.,Korf,H.W.: "Electron-microscopic investigations of vasoactive intestinal peptide(VIP)-like immunoreacitve terminal formations in the lateral septum of the pigeon." Cell Tissue Res.278. 415-418 (1994)
Description
「研究成果報告書概要(和文)」より
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[Publications] Ebihara,S.,Hasegawa,M,Adachi,A.,Hirunagi,K.: "Photic regulation of pineal melatonin rhythms in the pigeon." In:Evolution of Circadian Clock (Hiroshige,T.& Honma,K.eds.) Hokkaido Univ.Press,Sapporro.117-126 (1994)
Description
「研究成果報告書概要(和文)」より
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[Publications] Hirunagi,K.,Kiyoshi,K.,Adachi,A.Ebihara,S.,Maeda,K.,Korf,H.W.: "Vasoactive intestinal peptide (VIP) -like immunoreactive cerebrospinal fluid (CSF)-contacting neurons in the avian lateral septum." Neuroendocrinology. 60,Sippl.1. -76 (1994)
Description
「研究成果報告書概要(和文)」より
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[Publications] Hirunagi,K.,Kiyoshi,K.,Sakakibara,K.,Adachi,A.,Ebihara,S.,Silver,R.: "Opsin-and VIP-like immunoreactive cerebrospinal fluid (CSF) -contacting neurons in the lateral septum of the pigeon." Fourth IBRO World Congress of Neuroscience ABSTRACTS,Rapid Communications,Oxford,New York. -276 (1995)
Description
「研究成果報告書概要(和文)」より
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[Publications] Kiyoshi,K.,Adachi,A.,Ebihara,S.,Hirunagi,K.: "Morphological relationships between VIP-and GnRH-like immunoreactive neurons in the lateral septum of the pigeon." Abstracts of 6th international symposium on avian endocrinology,1996,Calgary,Canada. (印刷中). (1996)
Description
「研究成果報告書概要(和文)」より
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[Publications] Hirunagi, K., Kiyoshi, K., Adachi, A., Hasegawa, M., Ebihara, S., Korf, H.W.: "Electron-microscopic investigations of vasoactive intestinal peptide (VIP)-like immunoreactive terminal formations in the lateral septum of the pigeon." Cell Tissue Res.278. 415-418 (1994)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Ebihara, S., Hasagawa, M,Adachi, a., Hirunagi, K.: "Photic regulation of pineal melatonin rhythms in the pigeon." In : Evolution of Circadian Clock (Hiroshige, T.& Honma, K.eds.) Hokkaido Univ.Press, Sapporro. 117-126 (1994)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Hirunagi, K., Kiyoshi, K., Adachi, A., Ebihara, S., Maeda, K., Korf, H.W.: "Vasoactive intestinal peptide (VIP)-like immunoreactive cerebrospinal fluid (CSF)-contacting neurons in the avian lateral septum." Neuroendocrinology. 60, Suppl.1. 76 (1994)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Hirunagi, K., Kiyoshi, K., Sakakibara, K., Adachi, A., Ebihara, S., Silver, R.: "Opsin-and VIP-like immunoreactive cerebrospinal fluid (CSF) -contacting neurons in the lateral septum of the pigeon." Fourth IBRO World Congress of Neuroscience ABSTRACTS,Rapid Communications, Oxford, New York. 276 (1995)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Kiyoshi, K., Adachi, A., Ebihara, S., Hirunagi, K.: "Morphological relationships between VIP-and GnRH-like immunoreactive neurons in the lateral septum of the pigeon." Abstracts of 6th International Symposium on Avian Endocrinology, 1996, Calgary, Canada. (in press).
Description
「研究成果報告書概要(欧文)」より
