Generation of hydroxyl radicals and singlet oxygen during oxidation of rhododendrol and rhododendrol-catechol
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- Miyaji Akimitsu
- Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology
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- Gabe Yu
- Biological Science Laboratories, Kao Corporation
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- Kohno Masahiro
- Department of Bioengineering, Tokyo Institute of Technology
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- Baba Toshihide
- Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology
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<p>The generation of hydroxyl radicals and singlet oxygen during the oxidation of 4-(4-hydroxyphenyl)-2-butanol (rhododendrol) and 4-(3,4-dihydroxyphenyl)-2-butanol (rhododendrol-catechol) with mushroom tyrosinase in a phosphate buffer (pH 7.4) was examined as the model for the reactive oxygen species generation via the two rhododendrol compounds in melanocytes. The reaction was performed in the presence of 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) spin trap reagents for hydroxyl radical or 2,2,6,6-tetramethyl-4-piperidone (4-oxo-TEMP), an acceptor of singlet oxygen, and their electron spin resonances were measured. An increase in the electron spin resonances signal attributable to the adduct of DMPO reacting with the hydroxyl radical and that of 4-oxo-TEMP reacting with singlet oxygen was observed during the tyrosinase-catalyzed oxidation of rhododendrol and rhododendrol-catechol, indicating the generation of hydroxyl radical and singlet oxygen. Moreover, hydroxyl radical generation was also observed in the autoxidation of rhododendrol-catechol. We show that generation of intermediates during tyrosinase-catalyzed oxidation of rhododendrol enhances oxidative stress in melanocytes.</p>
収録刊行物
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- Journal of Clinical Biochemistry and Nutrition
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Journal of Clinical Biochemistry and Nutrition 60 (2), 86-92, 2017
一般社団法人 日本酸化ストレス学会
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詳細情報 詳細情報について
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- CRID
- 1390001204672904064
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- NII論文ID
- 130005398534
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- ISSN
- 18805086
- 09120009
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可