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A research on the character and the specific gene expression of spermatogonial stem cells

Research Project

Project/Area Number 12670025
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General anatomy (including Histology/Embryology)
Research InstitutionYokohama City University

Principal Investigator

SAWADA Hajime  Sch. Medicine, Dept. Anatomy, Yokohama City University, Professor, 医学部, 教授 (90101112)

Co-Investigator(Kenkyū-buntansha) ONO Michio  Sch. Medicine, Dept. Anatomy, Yokohama City University, Assist. Prof., 医学部, 助手 (50264601)
YAZAMA Futoshi  Sch. Medicine, Dept. Anatomy, Yokohama City University, Assist. Prof., 医学部, 助手 (00254160)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsSpermatogonia / Transplantation / Leuprorelin / Gonadotropin / Teststerone / c-Kit / Stem cell factor / 精祖細胞 / 精巣 / GFP / 再生 / 分化 / GnRH
Research Abstract

Male germ cells were isolated from donor mice, and successfully transplanted in mice devoid of germ cells. By using GFP transgenic mice as donors, transplanted germline stem cells could be distinguished from the cells of recipients, and their mode of expansion were traced under a fluorscent microscope. Three weeks after transplantation, most of the transplanted cells were undifferentiated spermatogoniae megative to c-Kit antibody, and formed distinct colonies. Later, more differentiated cells such as differentiated spermatogoniae and spermatocytes appeared in the colony.
With this transplantation system, we ingestigated the effect of a gonadotropin antagonist, leuprorelin, which suppresses the secretion of gonadotropin from the pituitary and thus raise the intratesticular production of testosterone.
When leuprorelin was adiministered, donor-derived colonies increased in size, showing the activation of growth of spermatogonial stem cells by leuprorelin. This indicates the inhibitory effect of testosterone in the process of spermatogonial growth, which is in contrast to the widely-accepted notion that testosterone is necessary for the survival and differentiation of germ cells after the meiotic stage.
In search for the mechanism of leuprorelin inhibition, we hypothesized that stem cell factor/c-Kit signalling system has the highest possibility, and investigated the effect of leuprorelin in Sl/Sl mutant mice which do not express stem cell factor. The donor derived colonies, however, were formed in the Sl/Sl recipeint testes without any detrimental effect. We concluded that leuprorelin showed its effect on spermatogoniae through signalling mechanisms other than SCF/c-Kit.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Dezawa, M: "Sciatic nerve regeneration in rats induced by transplantation of in vitro differentiated bon emarrow stromal cells"Eur.J.Neursci.. 14. 1771-1776 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Dezawa, M: "Effects of light and darkness on cell deaths in damaged retinal ganglion cells of the carp retina"Acta Neurobiol.Exp.. 61. 85-91 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Dezawa, M: "Gene transfer Into retinal ganglion cells by In vivo electroporation : a new approach"Micron. 33. 1-6 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kadonosono, K.: "Treatment of retinal detachftient resulting from myopic macular hole with internal limining membrane removal"Am.J.Ophthalmol.. 131. 203-207 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ono, M.: "Quantitative comparison of anti-fading mounting media for confocal laser scanning microscopy"J.Histochem.Cytochem.. 49. 305-311 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yazama, F.: "27kDa extracellular matrix protein revealed by a monoclonal antibody raised against rat testis"Anat.Rec.. 260. 402-409 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sawada, H.: "Gold and Silver Staining : Techniques in Molecular Morphology"Eaton Pub.(未定). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sawada,H., Esaki,M.: "A practical technique to postfix the nanogold-immunolabeled specimens with osmium and embed them in Epon for electron microscopy"J. Histochem. Cytochem.. 48. 493-498 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Isekl, E., Maarul, W., Sawada, H., Ueda, K., Kosaka, K.: "Accumulation of human α-synuclein in different cytoskeletons in Lewy bodies in brains of dementia with Lewy bodies"Neurosci. Lett.. 290. 41-44 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nakano,M., Atobe.Y., Goris,R.C., Yazama.F., Ono.M., Sawada.H., Kadota.T., Funakoshi,K., Kishida.R.: "Ultrastructure of the capillary pericytes and the expression of smooth muscle α-actin and desmin in the snake infrared sensory organs"Anat. Rec.. 260. 299-307 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yazama,F., Sawada, H.: "27kDa extracellular matrix protein revealed by a monoclonal antibody raised against rat testis"Anat. Rec.. 260. 402-409 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ono,M., Murakami,T., Kudo,A., Isshiki,M., Sawada,H., Segawa,A.: "Quantitative comparison of anti-fading mounting media for confocal laser scanning microscopy"J. Histochem. Cytochem.. 49. 305-311 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Iseki,E., Matsumura,T., Marui,W., Hino,H., Odawara,T., Sugiyama,N., Suzuki.K., Sawada,H., Arai,T., Kosaka,K.: "Familial frontotemporal dementia and parkinsonism with a novel N296H mutation in exon 10 of the tau gene and a widespread tau accumulation in the glial cells"Acta Neuropathol. 102. 285-292 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kadonosono.K., Yazama.F., Itoh.N., Uchino,E., Nakamura,S., Akura, J., Sawada,H., Ohno,S.: "Treatment of retinal detachment resulting from myopic macular hole with internal limining membrane removal"Am. J. Ophthalmol. 131. 203-207 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Dezawa.M., Mo,X., Oshitari,T., Takano,M., Meyer-Rochow,V.B., Sawada,H., Eguchi,E.: "Effects of light and darkness on cell deaths in damaged retinal ganglion cells of the carp retina"Acta Neurobiol. Exp.. 61. 85-91 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Dezawa,M., Takahashi,I., Esaki,M., Takano,M., Sawada,H.: "Sciatic nerve regeneration in rats induced by transplantation of in vitro differentiated bon emarrow stromal cells"Eur. J. Neurosci.. 14. 1771-1776 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Dezawa,M., Takano,M., Negishi,H., Mo,X., Oshitari,T., Sawada,H.: "Gene transfer into retinal ganglion cells by in vivo electroporation : a new approach"Micron. 33. 1-6 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sawada,H., Esaki,M: "In Gold and Silver Staining : Techniques in Molecular Morphology"G. W. Hacker & J. Gu (eds.) Eaton Pub., Natick, Ma.. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Dezawa, M: "Sciatic nerve regeneration in rats induced by transplantation of in vitro differentiated bon emarrow stromal cells"Eur. J. Neursci.. 14. 1771-1776 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Dezawa, M: "Effects of light and darkness on cell deaths in damaged retinal ganglion cell of the carp retina"Acta Neurobiol. Exp.. 61. 85-91 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Dezawa, M: "Gene transfer into retinal ganglion cells by in vivo electroporation : a new approach"Micron. 33. 1-6 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kadonosono, K.: "Treatment of retinal detachment resulting from myopic macular hole with internal limining membrane removal"Am. J. Ophthalmol.. 131. 203-207 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sawada, H: "Gold and Silver Staining : Techniques in Molecular Morphology"Eaton Pub. (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Sawada,M.Esaki: "A practical technique to postfix the nanogold-immunolabeled specimens with osmium and embed them in Epon for electron microscopy."J.Histochem.Cytochem.. 48. 493-498 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Ono,T.Murakami,A.Kudo,M.Isshiki,H.Sawada,A.Segawa: "Quantitative comparison of anti fading mounting media for confocal laser scanning microscopy."J.Histochem.Cytochem.. 49. 305-312 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Nakano,Y.Atobe.R.G.Goris,F.Yazama,M.Ono.,H.Sawada,.T.Kadota.K.Funakoshi.R.Kishida: "Ultrastructure of the capillary perioytes and the expression of smooth muscle actin and desmin in the snake infrared sensory organ."Anatomical Record. 260. 299-307 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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