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Local Photodynamic Therapy of Gastrointestinal Tumors by Water-soluble Polymerized Fullerene

Research Project

Project/Area Number 10470134
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Gastroenterology
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

TABATA Yasuhiko  Institute for Frontier Medical Sciences, Kyoto University, Professor, 再生医科学研究科, 教授 (50211371)

Co-Investigator(Kenkyū-buntansha) OKAZAKI Kazuichi  Graduate School of Medicine, Kyoto University, Associate Professor, 医学研究科, 助教授 (70145126)
筏 義人  京都大学, 再生医科学研究所, 教授 (00025909)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥11,700,000 (Direct Cost: ¥11,700,000)
Fiscal Year 1999: ¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1998: ¥6,800,000 (Direct Cost: ¥6,800,000)
KeywordsFullerene / Poly(ethylene glycol) / Water-soluble conjugate / Light irradiation / Anti-tumor activity / Photodynamic therapy
Research Abstract

Fullerene is known to efficiently generate singlet oxygen when irradiated with light. This will facilitate to induce a photodynamic effect on tumor, if its preferential accumulation in the tumor tissue is attained. To explore this tumor targeting of Fullerene, we chemically modified the water-insoluble fullerene with polyethylene glycol (PEG) not only to make fullerene soluble in water but also to enlarge its molecular size. When injected intravenously to mice carrying a tumor mass in the back subcutis, the large-sized, water-soluble fullerene-PEG conjugate exhibited higher accumulation and more prolonged fullerene retention in the tumor tissue than in the normal tissue. The conjugate was excreted from the body with time without being accumulated in a specific organ. Following intravenous injection of fullerene-PEG conjugates to the tumor-bearing mice coupled with exposure of the tumor site to visible light, the volume increase of the tumor mass was suppressed. Histological examination revealed that conjugate injection plus light irradiation strongly induced tumor necrosis without any damage to the overlaying normal skin. The antitumor effect of the conjugates increased with the increasing irradiation power and the fullerene dose, and the treatment with fullerene in a conjugate (424 g/kg) cured tumor at an irradiation power of 107 J/cmィイD12ィエD1. These findings indicate that the PEG-modified fullerene is a high potential agent for photodynamic tumor therapy.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Y.Tabata, Y. Ikada,Y. murakami: "Tumor accumulation of poly (vinyl alcohol) of different sizes after intravenous injection"J. Controlled Release. 50. 123-133 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Tabata, K. Xi, K. Uno, Y. Ikada: "Chemical conjegation of interferon with pullian and its antiviral activity"STP Pharma Sciences. 9. 101-105 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田畑 泰彦、筏 義人: "超音波利用で薬物利用増強"超音波工業. 99(3). 37-49 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Yasukawa, H.Kimura, Y.Tabata, et al.: "Targeted delivery of anti-angiogenic agent TNP-470 using water-soluble polymer in the treatment of choroidal neovasucularization"Investigative Ophthalmokogy & Visual Science. 40(1). 2690-2696 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Tabata, Y.Noda, Y.Matsui, et al: "Targrting of tumor necrosisi factor to tumor by use of dextran and metal coordination"J. Controlled Release. 59. 187-196 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Tabata, Y.Matsui, K.Uno, et al: "Simple mixing of IFN with an polysaccharide having high liver affinity enables IFN to target the liver"J. Interferon Cytokine Research. 19. 287-292 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yasuhiko Tabata, Yoshiyuki Murakami, and Yoshito Ikada: "Tumor accumulation of poly (vinyl alcohol) of different sizes after intravenous injection."J. Controlled Release. 50. 123-133 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yasuhiko Tabata, Keli Xi, Kazuko Uno, and Yoshito Ikada: "Chemical conjugation of interferon with pullulan and its antiviral activity."STP Pharma Sciences. 9. 101-105 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yasuhiko Tabata and Yoshito Ikada: "Potentiation of drug activity by ultrasound."Ultrasound TECNO. 99 (3). 37-49 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tsutomu Yasukawa, Hideya Kimura, Yasuhiko Tabata, Hideki Miyamoto, Yoshihito Honda, Yoshito Ikada, and Yuichiro Ogura: "Targeted delivery of anti-angiogenic gent TNP-470 using water-soluble polymer in the treatment of choroidal neovascularization."Investigative Ophthalmology & Visual Science. 40 (1). 2690-2696 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yasuhiko Tabata, Yukitsugu Noda, Yasuhiro Matsui, and Yoshito Ikada: "Targeting of tumor necrosis factor to tumor by use of dextran and metal coordination."J. Controlled Release. 59. 187-196 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yasuhiko Tabata, Yasuhiro Matsui, Kazuko Uno, Yoshihiro Sokawa, and Yoshito Ikada: "Simple mixing of IFN with an polysaccharide having high liver affinity enables IFN to target to the liver."J. Inteferon Cytokine Res.. 19. 287-292 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary

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Published: 1998-04-01   Modified: 2016-04-21  

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