| The radical scavenger edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one) reacts with a pterin derivative and produces a cytotoxic substance that induces intracellular reactive oxygen species generation and cell death. | |
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MedLine Citation:
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PMID: 18029546 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cytotoxic effects of the combined use of edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one), a radical scavenger and an approved medicine for acute brain infarction in Japan, with a pterin derivative, were examined in vitro. When pancreatic cancer cell line Panc-1 cells were incubated with 50 to 400 microM of a pterin derivative, 2-(N,N-dimethylaminomethyleneamino)-6-formyl-3-pivaloylpteridine-4-one (DFP), and the equivalent dose of edaravone, reactive oxygen species (ROS), were generated, and cell death was induced. ROS generation and the loss of mitochondrial membrane potential (MMP) preceding cell death were simultaneously monitored using time-lapse microscopy with an ROS-sensitive dye and a probe to monitor MMP, respectively. Cell death was also estimated quantitatively by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. ROS generation and cell death were prominent when more than 100 microM of each agent was used in combination, whereas the sole use of each agent did not show any effects even at the highest dose, 400 microM. Chemical analysis revealed that DFP and edaravone react immediately in aqueous solution and produce a new compound named DFP-E. DFP-E chemically reacted with NADH much faster than DFP and generated ROS, and biologically, it was much more cell-permeable than DFP. These findings collectively indicated that the combined use of DFP with edaravone produced DFP-E, which caused intracellular ROS generation and cell death. Cell death was observed in normal cells, and edaravone reacted with another pterin derivative to yield an ROS-generating compound. As a result, care should be taken with the clinical use of edaravone when pterin derivatives stay in the body. |
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Authors:
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Toshiyuki Arai; Mitsuru Nonogawa; Keisuke Makino; Nobuyuki Endo; Hiroko Mori; Takashi Miyoshi; Kouhei Yamashita; Masataka Sasada; Masahiro Kakuyama; Kazuhiko Fukuda |
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Publication Detail:
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Type: Comparative Study; Journal Article Date: 2007-11-20 |
Journal Detail:
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Title: The Journal of pharmacology and experimental therapeutics Volume: 324 ISSN: 1521-0103 ISO Abbreviation: J. Pharmacol. Exp. Ther. Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2008-01-25 Completed Date: 2008-02-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376362 Medline TA: J Pharmacol Exp Ther Country: United States |
Other Details:
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Languages: eng Pagination: 529-38 Citation Subset: IM |
Affiliation:
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Department of Anesthesia, Kyoto University Hospital, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan. arai@kuhp.kyoto-u.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Antipyrine
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analogs & derivatives*,
chemistry,
metabolism Cell Death / physiology Cell Survival / drug effects, physiology Cells, Cultured Cytotoxins / metabolism* Free Radical Scavengers / chemistry, metabolism* Humans Intracellular Fluid / metabolism* Pterins / chemistry, metabolism* Reactive Oxygen Species / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Cytotoxins; 0/Free Radical Scavengers; 0/Pterins; 0/Reactive Oxygen Species; 60-80-0/Antipyrine; 89-25-8/phenylmethylpyrazolone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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