Potentiation of Bleomycin in Jurkat Cells by Fungal Pycnidione
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- Kaneko Mayumi
- Graduate School of Pharmaceutical Sciences, Kitasato University
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- Matsuda Daisuke
- Graduate School of Pharmaceutical Sciences, Kitasato University
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- Ohtawa Masaki
- Graduate School of Pharmaceutical Sciences, Kitasato University
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- Fukuda Takashi
- Kitasato Institute for Life Sciences and Graduate School of Infection Control Sciences, Kitasato University
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- Nagamitsu Tohru
- Graduate School of Pharmaceutical Sciences, Kitasato University
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- Yamori Takao
- Division of Molecular Pharmacology, Cancer Chemotherapy Center, Japanese Foundation for Cancer Research
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- Tomoda Hiroshi
- Graduate School of Pharmaceutical Sciences, Kitasato University
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抄録
Most cancer cells have mutations in genes at the G1 checkpoint and repair DNA only in the G2 phase; therefore, the G2 checkpoint is a potential target to develop novel therapy. In the course of screening, a known compound, pycnidione, was isolated from the fungal culture broth of Gloeotinia sp. FKI-3416. Pycnidione irreversibly abrogated bleomycin-induced G2 arrest in Jurkat cells and synergically potentiated the cytotoxicity of bleomycin. To elucidate the mechanism of action, the effect of pycnidione on the signal transduction of the G2 checkpoint was analyzed, showing that the increased phospho-cyclin dependent kinase-1 (CDK1) level caused by bleomycin was abrogated in the presence of pycnidione, indicating that cells did not arrest at the G2 phase. Moreover, under these conditions, Chk1 and Chk2 levels were markedly down-regulated. Thus, we concluded that pycnidione abrogated bleomycin-induced G2 arrest by decreasing Chk1 and Chk2.
収録刊行物
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- Biological & Pharmaceutical Bulletin
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Biological & Pharmaceutical Bulletin 35 (1), 18-28, 2012
公益社団法人 日本薬学会
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詳細情報 詳細情報について
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- CRID
- 1390001204632429952
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- NII論文ID
- 130001872337
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- NII書誌ID
- AA10885497
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- ISSN
- 13475215
- 09186158
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- NDL書誌ID
- 024029581
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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