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低酸素応答転写因子HIF-2αと膀胱癌の進展との関係

Research Project

Project/Area Number 14770799
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Urology
Research InstitutionTokyo Medical and Dental University

Principal Investigator

兵地 信彦  東京医科歯科大学, 大学院・医歯学総合研究科, 助手 (30275896)

Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2004: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords膀胱癌 / 低酸素応答転写因子
Research Abstract

過去に当院で手術治療を行った膀胱癌患者の膀胱全摘手術標本から薄切切片を作成して、免疫組織染色法を用いて低酸素応答転写因子HIF-2α発現の有無をまず検討した。研究対象はHIF-2αが血管新生を亢進し膀胱癌の浸潤・転移に関与している可能性を検討するため、組織学的に悪性度が高く筋層浸潤を有する浸潤性膀胱癌とした。方法は、免疫組織学的手法で低酸素応答転写因子HIF-2αに対するポリクローナル抗体を用いて行った。検討の結果、低酸素応答転写因子HIF-2αが膀胱癌の浸潤部で高頻度に発現していることが判明した(Urology. 2002 May ;59(5):774-8.)。また、特に悪性度の高い膀胱癌では浸潤部にCD-68陽性のマクロファージが増加しており、さらにそのマクロファージに低酸素応答転写因子HIF-2αの強発現が認められることが判明した。
以上の結果をもとに、次に低酸素応答転写因子HIF-2αの発現と生命予後との相関を解析した。膀胱全摘を受けた手術患者の各臨床的事項について解析を行ない、低酸素応答転写因子HIF-2αの発現との相関を検討した。その結果、低酸素応答転写因子HIF-2αの発現している膀胱癌患者では生命予後が不良である傾向が見られた。また、浸潤部マクロファージにおける低酸素応答転写因子HIF-2αの発現が高い膀胱癌ほど予後不良の傾向があり、低酸素応答転写因子HIF-2α陽性マクロファージが癌の進展に関与している可能性が示唆された(J Urol.2004 Mar ;171(3):1080-1084.)。

Report

(3 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (8 results)

All 2004 2003 2002 Other

All Journal Article (4 results) Publications (4 results)

  • [Journal Article] Prognostic Significance of Endothelial Per-Arnt-Sim Domain Protein 1/Hypoxia-Inducible Factor-2alpha Expression in a Subset of Tumor Associated Macrophages in Invasive Bladder Cancer.2004

    • Author(s)
      Koga F, Kageyama Y, Kawakami S, Fujii Y, Hyochi N, Ando N, Takizawa T, Saito K, Iwai A, Masuda H, Kihara K.
    • Journal Title

      Journal of Urology 171(3)

      Pages: 1080-1084

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Reconstruction of the sympathetic pathway projecting to the prostate by nerve grafting in the dog.2004

    • Author(s)
      Hyochi N, Kihara K, Arai G, Yonese J, Kobayashi T, Kageyama Y, Sato K.
    • Journal Title

      BJU International 94(1)

      Pages: 147-152

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Favorable outcome of preoperative low dose chemoradiotherapy against muscle-invasive bladder cancer.2003

    • Author(s)
      Kageyama Y, Yokoyama M, Sakai Y, Saito K, Koga F, Yano M, Arai G, Hyochi N, Masuda H, Fujii Y, Kawakami S, Kobayashi T, Kihara K.
    • Journal Title

      American Journal of Clinical Oncology 26(5)

      Pages: 504-507

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Positive expression of HIF-2alpha/EPAS1 in invasive bladder cancer.2002

    • Author(s)
      Xia G, Kageyama, Y, Hayashi T, Hyochi N, Kawakami S, Kihara K.
    • Journal Title

      Urology 59(5)

      Pages: 774-778

    • Related Report
      2004 Annual Research Report
  • [Publications] Koga F, Kageyama Y, Kawakami S, Fujii Y, Hyochi N, Ando N, Takizawa T, Saito K, Iwai A, Masuda H, Kihara K.: "Prognostic Significance of Endothelial Per-Arnt-Sim Domain Protein 1/Hypoxia-Inducible Factor-2alpha Expression in a Subset of Tumor Associated Macrophages in Invasive Bladder Cancer."Journal of Urology. 171(3). 1080-1084 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hyochi N, Kihara K, Arai G, Yonese J, Kobayashi T, Kageyama Y, Sato K.: "Reconstruction of the sympathetic pathway projecting to the prostate by nerve grafting in the dog."BJU International. in press. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kobayashi T, Kihara K, Hyochi N, Masuda H, Sato K.: "Spontaneous regeneration of the seriously injured sympathetic pathway projecting to the prostate over a long period in the dog."BJU International. 91(9). 868-872 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kageyama Y, Yokoyama M, Sakai Y, Saito K, Koga F, Yano M, Arai G, Hyochi N, Masuda H, Fujii Y, Kawakami S, Kobayashi T, Kihara K.: "Favorable outcome of preoperative low dose chemoradiotherapy against muscle-invasive bladder cancer."American Journal of Clinical Oncology. 26(5). 504-507 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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