著者

金村 米博 市村 幸一 正札 智子 山崎 麻美 渋井 壮一郎 新井 一 西川 亮

出版者

日本脳神経外科コングレス

雑誌

脳神経外科ジャーナル (ISSN:0917950X)

巻号頁・発行日

vol.24, no.7, pp.436-444, 2015

被引用文献数

1

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 近年, 髄芽腫の分子遺伝学的診断および国際コンセンサス4分子亜群分類 (WNT, SHH, Group 3, Group 4) は, 腫瘍特性解析, 腫瘍分類, 臨床的リスク評価, 新規治療法開発に大きなブレークスルーを引き起こしている. 国内では, 日本小児分子脳腫瘍グループ (JPMNG) が組織され, 全国から試料を収集し, 国際的コンセンサスに基づく小児脳腫瘍の遺伝子診断実施体制の構築が開始されている. 髄芽腫の分子遺伝学的診断は, 今後の診療および研究において, 重要かつ不可欠な手法になると思われ, 本邦のJPMNG研究は, 現在いまだに完治が困難な髄芽腫の診療水準のさらなる向上と予後改善に大きく貢献し得ると考える.

著者

渋井 壮一郎

出版者

日本脳神経外科学会

雑誌

Neurologia medico-chirurgica (ISSN:04708105)

巻号頁・発行日

vol.24, no.2, pp.65-72, 1984

被引用文献数

1

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The antitumor effect of 5'-deoxy-5-fluorouridine (5'-DFUR) against experimental glioma cells was investigated in vitro and in vivo. 5'-DFUR is a newly synthesized masked compound of 5-FU, which is activated only in the presence of pyrimidine nucleoside phosphorylase. This enzyme has been reported to exist much more in malignant tumors, such as Sarcoma 180 and Ehrlich ascites carcinoma, than in normal tissues. The activities analysed in 9L, RG12, and 203GL cells were 24.3, 75.1, and 8.1% respectively of the activity in Sarcoma 180. Normal rat brain showed 22.8% of the activity. Growth curves of cultured 9L and RG12 cells showed a dose-dependent 5'-DFUR antitumor effect when it was used at a concentration of over 10 μgml. The colony forming rate of 9L cells treated with 20 μgml of 5'-DFUR decreased to 10%. The inhibition rate of 203GL cells transplanted subcutaneously into C57BL mice was 52.3% in weight, and that of human glioblastoma cells transplanted subcutaneously into nude mice was 20.9% in size after treatment with 5'-DFUR, 400 mgkgday for ten consecutive days. When 9L cells were transplanted intracranially into CD Fisher rats, their median survival time became four days longer than that of non-treated rats. Flowcytometric analysis of in vitro 9L cells and in vivo 203GL cells showed an accumulation in the cells between the 2C and 4C components after treatment of 5'-DFUR. It seems that a delay in DNA synthesis occurred in the presence of this drug. This newly synthesized antitumor drug is expected to be effective for the treatment of malignant brain tumors.