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Receptors for Growth Factors in Capillaries Isolated from Human Glioblastomas and Meningiomas

Research Project

Project/Area Number 06671401
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Cerebral neurosurgery
Research InstitutionNAGASAKI UNIVERSITY

Principal Investigator

NIWA Masami  School of Medicine, Nagasaki University, Professor, 医学部, 教授 (20136641)

Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsBrain Tumor / Radioluminographic imaging plate system / Quantitative receptor autoradiography / Growth factor receptors / Glioblastoma / Meningioma / Brain tumor capillary / Growth factors / radioluminographic imaging plate system / glioblastoma / meningioma
Research Abstract

We identified and characterized ^<125>I-endothelin-1 (^<125>I-ET-1) and ^<125>I-vascular endothelial growth factor (^<125>I-VEGF) binding sites in tumor capillaries isolated from human glioblastomas and meningiomas, using the quantitative receptor autoradiographic technique with pellet sections. Quantification was done using the computerized radioluminographic imaging system. High-affinity ET system receptors were localized in capillaries from glioblastomas (Kd=0.47<plus-minus>0.01 nM,Bmax=161<plus-minus>38 fmol/mg, mean<plus-minus>SEM,n=5) and the surrounding brain tissues (Kd=0.16<plus-minus>0.03nM,Bmax=140<plus-minus>37 fmol/mg, n=5). The ET_A receptor occupied 70 and 55% and the ET_B receptor occupied 30 and 45% of the binding to capillaries from glioblastomas and brains, respectively. In cases of capillaries from meningiomas, there were relatively low-affinity binding sites of ^<125>I-ET-1 with a Kd of 1.2<plus-minus>0.3 nM and Bmax of 185<plus-minus>56 fmol/mg (n=9). Capillaries in human meningiomas expressed a large number of the ET_A receptor with a small proportion of the ET_B receptor. We also detected a high-affinity binding of ^<125>I-VEGF to capillaries from glioblastomas, a candidate of VEGF receptors. Our results suggest that ET and VEGF have a role in neovascularization, tumor blood flow, and/or function of the blood-tumor barrier in meningioma and blioblastoma tissues by interacting with specific receptors present on the surface of the endothelium.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Keisuke Tsutsumi et al.: "Effects of suramin on ^<125>I-insulin-like growth factor I binding to human meningiomas and inhibits proliferation of meningioma cells" Journal of Neurosurgery. 80. 502-509 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Naoki Kitagawa et al.: "Expression of a functional endothelin (ET_A) receptor in human meninqiomas" Journal of Neurosurgery. 80. 723-731 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Naoki Kitagawa et al.: "A selective endothelin ET_A antagonist BQ-123 inhibits ^<125>I-endothelin-1 (ET-1) binding to human meningiomas antagonizes ET-1-induced proliferation of meningioma cells" Cellular and Molecular Neurobiology. 14. 105-118 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Keisuke Tsutsumi et al.: "Enhanced expression of an endothelin ET_A receptor in capillaries from human glioblastoma : A guantitative receptor autoradiographic analysis using a radioluminographic imaging plate system" Journal of Neurochemistry. 63. 2240-2247 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 堤 圭介 他: "脳腫瘍の微小血管における増殖因子受容体の定量化" 神経免疫研究. 7. 43-51 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Sei-ichi Yamaga et al.: "Endothelin receptors in microvessels isolated from human meningiomas:A quantification with radioluminography" Cellular and Molecular Neurobiology. 15. 327-340 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Keisuke Tsutsumi et al.: "Effects of suramin on ^<125>I-insulin-like growth I binding to human meningiomas and inhibits proliferation of meningioma cells" Journal of Neurosurgery. 80. 502-509 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Naoki Kitagawa et al.: "Expression of a functional endothelin (ET_A) receptor in human meningiomas" Journal of Neurosurgery. 80. 723-731 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Naoki Kitagawa et al.: "A selective endothelin ET_A antagonist BQ-123 inhibits ^<125>I-endothelin-1 (ET-1) binding to human meningiomas antagonizes ET-1-induced proliferation of meningioma cells" Cellular and Molecular Neurobiology. 14. 105-118 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Keisuke Tsutsumi et al.: "Enhanced expression of an endothelin ET_A receptor in capillaries from human glioblastoma : A quantitative receptor autoradiographic analysis using a radioluminographic imaging plate system" Journal of Neurochemistry. 63. 2240-2247 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Masami Niwa: "Quantitative receptor autoradiography" Folia Pharmacologica Japonica. 103. 151-160 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Sei-ichi Yamaga et al.: "Endothelin receptors in microvessels isolated from human meningiomas : A quantification with radioluminography" Cellular and Molecular Neurobiology. 15. 327-340 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Keisuke Tsutsumi: "Effects of suramin on ^<125>I-insulin-like growth factor I binding to human meningiomas and inhibits proliferation of meningioma cells" Journal of Neurosurgery. 80. 502-509 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Naoki Kitagawa: "Expression of a functional endothelin (ET_A) receptor in human meningiomas" Journal of Neurosurgery. 80. 723-731 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Naoki Kitagawa: "A selective endothelin ET_A antagonist BQ-123 inhibits ^<125>I-endothelin-1(ET-1) binding to human meningiomas antagonizes ET-1-induced proliferation of meningioma cells" Cellular and Molecular Neurobiology. 14. 105-118 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Keisuke Tsutsumi: "Enhanced expression of an endothelin ET_A receptor in capillaries from human glioblastoma : A quantitative receptor autoradiographic analysis using a radioluminographic imaging plate system" Journal of Neurochemistry. 63. 2240-2247 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] 堤 圭介: "脳腫瘍の微小血管における増殖因子受容体の定量化" 神経免疫研究. 7. 43-51 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Sei-ichi Yamaga: "Endothelin receptors in microvessels isolated from human meningiomas : A quantification with radioluminography" Cellular and Molecular Neurobiology. 15. 327-340 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Keisuke Tsutsumi: "Effects of suramin on ^<125>I-insulin-like growth factor I binding to human meningiomas and inhibits proliferation of meningima cells" Journal of Neurosurgery. 80. 502-509 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Naoki Kitagawa: "Expression of a functional endothelin(ETA)receptor in human meningiomas" Journal of Neurosurgery. 80. 723-731 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Naoki Kitagawa: "A selective endothelin ETA antagonist BQ-123 inhibits ^<125>I-endothelin-1(ET-1) binding to human meningiomas and antagonizes ET-1-induced proliferation of meningioma cells" Cellular and Molecular Neurobilogy. 14. 105-118 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Keisuke Tsutsumi: "Enhanced expression of an endothelin ETA receptor in capillaries from human glioblastoma: A quantitative receptor autoradiographic analysis using a radioluminographic imaging plate system" Journal of Neurochemistry. 63. 2240-2247 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Sei-ichi Yamaga: "Endothelin receptors in microvessels isolated from human meningiomas: A quantification with radioluminography" Cellular and Molecular Neurobiology. (in press). (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 堤 圭介: "脳腫瘍の微小血管に発現する増殖因子受容体の定量的解析" 神経免疫研究. (in press). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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