• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Cellular organization and neuronal inducer (inhibitor) in Xenopus adenohypothesis.

Research Project

Project/Area Number 08640841
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生物形態・構造
Research InstitutionShizuoka Universty (1997)
Gunma University (1996)

Principal Investigator

TANAKA Shigeyasu  Faculty of Sciense, Shizuoka University, Professor, 理学部, 教授 (90146233)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsPituitary gland / Pars intermedia / Hypothalum / Xenopus laevis / Neuronal inducer / Bioassay / Proopiomelanocortin / alpha-MSH / 視床下部神経
Research Abstract

The adenohypophysis consists of two distinct parts, the pars distalis and the pars intermedia, both derived from a common embryonic rudiment called Rathke's pouch and regulated by the hypothalamus. However, the control mechanisms of the pars distalis and the pars intermedia are different from each other. Hormone-producing cells in the pars distalis are controlled by hypothalamic hormones produced by hypothalamic neurons carried via hypothalamo-hypophysial blood vessels, whereas the melanotrope cells in the pars intermedia are controlled directly by the hypothalamic neurons. Evidence of these mechanisms is the great number of blood vessels located in the pars distalis, whereas in the pars intermedia, the blood vessels are not nearly so well developed, and also by the many axons penetrating the pars intermediate. Such histological observations create a working hypothesis that the pars intermedia produces some factors that induce neurons, whereas the pars distalis secretes some factors in … More ducing morphogenesis of blood vessels. To identify these factors, I have tried to establish an in vitro bioassay system for quantitating the presence and length of the axons projecting from hypothalamic neurons into the pars intermedia. I co-cultured suprachiasmatic nuclei from hypothalamus of Xenopus tadpoles in collagen-matrix with pars intermedia from identical stages of development or from the adult toad, and counted the number of axons growing from the superchiamatic nuclei a fixed period of incubation. I observed a slight difference in the outgrowth of the axons when the suprachiasmatic nuclei were co-cultured with either the pars distalis or the pars intermedia, but the quantity and reproducibility of the observation were low. In the course of studies on the characterization of melanotrope cells in the Xenopus pars intermedia, I have found that the prohormone convertases PC1 and PC2 are involved in the proteolytic processing of proopiomelanocortin into alpha-MSH by using specific antibodies against the mammalian enzymes. Less

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Tanaka, S.: "Proteolytic processing of pro-opiomclanocortin occurs in acidifying secretory granules of AtT-20 cells." J.Histochem.Cytochem.45. 425-436 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kurabuchi, S.: "Immunocytochemical localization of prohormone convertases PC1 and PC2 in anuran pituitary gland-subcellular localization in corticotrope and melanotrope cells." Cell Tissue Res.288. 485-496 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tanaka, S.: "Production and characterization of specific anti-peptide antiserum against free α-subunit of rat pituitary glycoprotein hormones." J.Histochem.Cytochem.45. 985-990 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Berghs, C.A.F.M.: "The secretory granule and pro-opiomelanocortin processing in Xenopus melanotrope cells during background adaptation." J.Histochem.Cytochem.45. 1673-1682 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kurabuchi, S.and Tanaka, S.: "Immunocytochemical localization of prohormone convertases PC1 and PC2 in anuran pituitary gland-subcellular localization in corticotrope and melanotrope cells" Cell Tissue Res.288. 485-496 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Berghs, C.A.F.M., Tanaka, S., Van Strien, F.J.C., Kurabuchi, S.and Roubos, E.W.: "The secretory granule and pro-opiomelanocortin processing in Xenopus melanotrope cells during background adaptation" J.Histochem.Cytochem.45. 1673-1682 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tanaka,S.: "Proteolytie processing of pro-opiomelanocortin occurs in acidifying secretory granules of AtT-20 cells." J.Histochem.Cytochem.45. 425-436 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kurabuchi,S.: "Immunocytochemical localization of prohormone convertases PC1 and PC2 in anuran pituitary gland-subcellular localization in corticotrope and melanotrope cells." Cell Tissue Res.288. 485-496 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Oguchi,A.: "Enhancement by prolactin on the GnRH-induced release of LH from dispersed anterior pituitary cells of the bullfrog(Rana catesbeiana)." Gen.Comp.Endocrinol.107. 128-135 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tanaka,S.: "Production and characterization of specific anti-peptide antiserum against free α-subunit of rat pituitary glycoprotein hormones." J.Histochem.Cytochem.45. 985-990 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Berghs,C.A.F.M.: "The secretory granule and pro-opiomelanocortin processing in Xenopus melanotrope cells during background adaptation." J.Histochem.Cytochem.45. 1673-1682 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Ohta,K.: "The receptor tyrosine kinase,Cek8,is transiently expressed on subtytpes of motonerons in the spinal cord during development." Mecdh.Develop.54. 59-69 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Pinelli,C.: "Immunohistochemical demonstration of FSH and LH in the pituitary of the developing frog,Rana esculenta." Gen.Comp.Endocrinol.104. 189-196 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yamaguchi,M.: "Immunohisto-and immunocytochemistry studies on the dynamics of TSH and GTH cells in normally metamorphosing,metamorphosed and metamorphosis-arrested Hynobius retardatus." Gen.Comp.Endocrinol.104. 273-283 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tanaka,S.: "Proteolytic processing of pro-opiomelanocortin occurs in acidifying Seretory granules of AtT-20 cells." J.Histochem.Cytochem.45(in press).

    • Related Report
      1996 Annual Research Report
  • [Publications] Tanaka,S.: "Production and characterization of specific anti-peptide antiserum against α-subunit of rat pituitary glycoprotein hormones." J.Histochem.Cytochem.45(in press).

    • Related Report
      1996 Annual Research Report
  • [Publications] Kurabuchi,S.: "Immunocytochemical localization of prohormone convertases PC1 and PC2 in anuran pituitary gland." Cell Tissue Res.(in press).

    • Related Report
      1996 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi