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2000 Fiscal Year Final Research Report Summary

Molecular Basis for Neurohormonal Control of Salmonid Spawning Migration

Research Project

Project/Area Number 10102001
Research Category

Grant-in-Aid for Specially Promoted Research

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionGrant-in Aid for Specially Promoted Research (2)

Principal Investigator

URANO Akihisa  Hokkaido Univ., Grad.Sch.of Sci., Prof., 大学院・理学研究科, 教授 (00142232)

Co-Investigator(Kenkyū-buntansha) ANDO Hironori  Hokkaido Univ., Grad.Sch.of Sci., Assist.Prof., 大学院・理学研究科, 助手 (60221743)
ITO Etsuro  Hokkaido Univ., Grad.Sch.of Sci., Assoc.Prof., 大学院・理学研究科, 助教授 (80203131)
ABE Shuiti  Hokkaido Univ., Fac.of Sci., Assoc.Prof., 理学部, 助教授 (80125278)
Project Period (FY) 1998 – 2000
KeywordsSalmon / Migration / Neurohormone / GnRH / Vasotocin / Genetic Program / Instinctive Behavior
Research Abstract

Spawning migration of salmon is a typical stereotyped or instinctive behavior which is genetically programmed. However, molecular approaches are rare to reveal what is a genetic program of salmon migration. Aiming clarification of such genetic program as the final goal, we examined molecular bases of neuroendocrine mechanisms for salmon spawning migration. Since spawning migration is reproductive behavior, we hypothesized that preoptic neurons producing gonadotropin-releasing hormone (GnRH) and vasotocin (VT) have a crucial role in coordination of the sensory, motor and motivational function of the central nervous system and the neuroendocrine function of the brain-pituitary-gonadal axis. The coordinated activity of the central nervous system and the neuroendocrine system should be crucial for the success of reproduction, that is, the neural controls of migratory and spawning behavior must be temporally and spacially coincident. Herewith. we determined absolute changes in the amounts of mRNAs encoding neurohormones and pituitary hormones along migratory pathways to elucidate changes in expression of hormonal genes during migration. We further analyzed regulatory mechanisms of expression of hormonal genes in salmonids. The results obtained through the present project actually support our hypothesis mentioned above.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Taniyama,S.: "Effects of GnRH analogue on expression of genes encoding GH/PRL/SL family and Pit-1/GHF-1 in the pituitaries of pre-spawning sockeve salmon"General and Comparative Endocrinology. 118(3). 418-424 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Salam,MD.A.: "Immunohistochemical analysis of pituitary cells in pre-spawning chum salmon."Zoological Sciences. 17(6). 805-819 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Higa,M.: "Quantitative analysms of fushi tarazu factor l homolog mRNAs in the pituitary of salmon at different pre-spawning stages."Biology of Reproduction. 63. 1756-1763 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kitahashi,T.: "Micro data logger analyses of homing behavior of chum salmon in Ishikari bay."Zoological Sciences. 17(9). 1247-1253 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sato,S.: "Genetic variations among Japanese populations of chum salmon inferred from the nucleotide sequences of the mitochondrial DNA control region."Zoological Science. 18(6). 99-106 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Saito,D.: "Effects of sexual maturation and osmoregulatory capacity on expression of vasotocin gene in pre-spawning chum salmon."Zoological Sciences. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ando,H.: "Signal transduction pathways and transcription factors in the gonadotropin-releasing hormone-stimulated gonadotropin subunit gene expression"Comparative Biochemistry and Physiology. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Higa,M.: "Expression of Pit-1 and fushi-tarazu factor 1 homolog genes in the pituitary of pre-spawning chum and sockege salmons"Comparative Biochemistry and Physiology. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 浦野明央: "行動の分子生物学 : サケの回遊行動を支配するホルモンと遺伝子"シュプリンガー・フェアラーク東京. 162 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taniyama, S., Kitahashi, T., Ando, H., Kaeriyama, M., Zohar, Y., Ueda, H.and Urano, A.: "Effects of GnRH analogue on expression of genes encoding GH/PRL/SL family and Pit-1/GHF-1 in the pituitaries of pre-spawning sockeye salmon."General and Comparative Endocrinology. 118(3). 418-424 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Salam, MD.A., Ando, H., Ban, M., Ueda, H.and Urano, A.: "Immunohistochemical analysis of pituitary cells in pre-spawning chum salmon."Zoological Science. 17(6). 805-819 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Higa, M., Kanda, H., Kitahashi, T., Ito, M., Shiba, T.and Ando, H.: "Quantitative analysis of fushi tarazu factor 1 homolog mRNAs in the pituitary of salmon at different pre-spawning stages."Biology of Reproduction. 63. 1756-1763 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kitahashi, T., Ando, H., Urano, A., Ban, M., Saito, S., Tanaka, H., Naito, Y.and Ueda, H.: "Micro data logger analyses of homing behavior of chum salmon in Ishikari bay."Zoological Science. 17(9). 1247-1253 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sato, S., Ando, J., Ando, H., Urawa, S., Urano, A.and Abe, S.: "Genetic variations among Japanese populations of chum salmon inferred from the nucleotide sequences of the mitochondrial DNA control region."Zoological Science. 18(1). 99-106 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Saito, D., Ota, Y., Hiraoka, S., Hyodo, S., Ando, H.and Urano, A.: "Effects of sexual maturation and osmoregulatory capacity on expression of vasotocin gene in pre-spawning chum salmon."Zoological Science. 18(in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ando, H., Hew, C.L.and Urano, A.: "Signal transduction pathways and transcription factors involved in the gonadotropin-releasing hormone-stimulated gonadotropin subunit gene expression."Comparative Biochemistry and Physiology. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Higa, M., Ando, H.and Urano, A.: "Expression of fushi tarazu factor 1 homolog and Pit-1 genes in the pituitaries of pre-spawning chum and sockeye salmon."Comparative Biochemistry and Physiology. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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