Formation of Superoxide Anion during Ferrous Ion-Induced Decomposition of Linoleic Acid Hydroperoxide under Aerobic Conditions

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概要

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• We studied the mechanism of formation of oxygen radicals during ferrous ion-induced decomposition of linoleic acid hydroperoxide using the spin trapping and chemiluminescence methods. The formation of the superoxide anion (O2.-) was verified in the present study. The hydroxyl radical is also generated through Fenton type decomposition of hydrogen peroxide produced on disproportionation of O2.-. A carbon-centered radical was detected using 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline N-oxide (DEPMPO) as a spin trap. Alkoxyl radical formation is essential for the conversion of linoleic acid hydroperoxide into the peroxyl radical by ferrous ion. It is likely that the alkoxyl radical [R1CH(O.)R2] is converted into the hydroxylcarbon radical [R1C.(OH)R2] in water, and that this carbon radical reacts with oxygen to give the α-hydroxyperoxyl radical [R1R2C(OH)OO.], which decomposes into the carbocation [R1C+(OH)R 2] and O2.-.

• 日本生化学会 = Japanese Biochemical Societyの論文
• 2003-12-01

著者

• OGINO Keiki

  Department of Public Health, Okayama University Graduate School of Medicine, Dentistry & Pharmaceuti

• KAMBAYASHI Yasuhiro

  Department of Environmental and Preventive Medicine, Graduate School of Medical Science, Kanazawa Un

• Ogino Keiki

  日本抗体研究所

• KATO Masashi

  Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology

• Ogino Keiki

  Department Of Environmental And Preventive Medicine Graduate School Of Medical Science Kanazawa Univ

• Tero(kubota) Shozo

  Institute Of Multidisciplinary Research For Advanced Materials Tohoku University

• Tero-kubota Shozo

  Institute For Chemical Reaction Science Tohoku University

• YAGI Kunio

  Institute of Applied Biochemistry, Yagi Memorial Park

• NAKANO MINORU

  Department of Anesthesia and Intensive Care Medicine, Maebashi Red Cross Hospital

• Yamamoto Yorihiro

  School Of Bionics Tokyo University Of Technology

• Kato Masashi

  Department Of Bioenvironmental Medicine Graduate School Of Medicine Chiba University

• Kambayashi Yasuhiro

  Department Of Environmental And Preventive Medicine Graduate School Of Medical Science Kanazawa Univ

• Yagi Kunio

  Institute Of Applied Biochemistry Yagi Memorial Park

• Nakano Minoru

  Department Of Anesthesia And Intensive Care Medicine Maebashi Red Cross Hospital

• Nakano Minoru

  Department Of Photon And Free Radical Research Japan Immunoresearch Laboratories

• Kato Masashi

  Department Of Applied Biological Chemistry Fuculty Of Agriculture Meijo University

• Kato Masashi

  Department Of Environmental And Preventive Medicine Graduate School Of Medical Science Kanazawa Univ

• Kambayashi Yasuhiro

  Department Of Environmental And Preventive Medicine Faculty Of Medicine Institute Of Medical Pharmaceutical And Health Sciences Kanazawa University

• Kato Masashi

  Department Of Applied Biological Chemistry Faculty Of Agriculture Meijo University

• Yamamoto Yorihiko

  School of Bionics, Tokyo University of Technology

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