1
|
Sakurai Y, Yamaguchi S, Yamashita T, Lu Y, Kuwabara K, Yamaguchi T, Miyake Y, Kanaori K, Watanabe S, Tajima K. Mechanisms Associated with Superoxide Radical Scavenging Reactions Involving Phenolic Compounds Deduced Based on the Correlation between Oxidation Peak Potentials and Second-Order Rate Constants Determined Using Flow-Injection Spin-Trapping EPR Methods. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:16018-16031. [PMID: 38960914 DOI: 10.1021/acs.jafc.4c02873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Flow-injection spin-trapping electron paramagnetic resonance (FI-EPR) methods that involve the use of 5,5-dimethyl-pyrroline-N-oxide (DMPO) as a spin-trapping reagent have been developed for the kinetic study of the O2•- radical scavenging reactions occurring in the presence of various plant-derived and synthetic phenolic antioxidants (Aox), such as flavonoid, pyrogallol, catechol, hydroquinone, resorcinol, and phenol derivatives in aqueous media (pH 7.4 at 25 °C). The systematically estimated second-order rate constants (ks) of these phenolic compounds span a wide range (from 4.5 × 10 to 1.0 × 106 M-1 s-1). The semilogarithm plots presenting the relationship between ks values and oxidation peak potential (Ep) values of phenolic Aox are divided into three groups (A1, A2, and B). The ks-Ep plots of phenolic Aox bearing two or three OH moieties, such as pyrogallol, catechol, and hydroquinone derivatives, belonged to Groups A1 and A2. These molecules are potent O2•- radical scavengers with ks values above 3.8 × 104 (M-1 s-1). The ks-Ep plots of all phenol and resorcinol derivatives, and a few catechol and hydroquinone derivatives containing carboxyl groups adjacent to the OH groups, were categorized into the group poor scavengers (ks < 1.6 × 103 M-1 s-1). The ks values of each group correlated negatively with Ep values, supporting the hypothesis that the O2•- radical scavenging reaction proceeds via one-electron and two-proton processes. The processes were accompanied by the production of hydrogen peroxide at pH 7.4. Furthermore, the correlation between the plots of ks and the OH proton dissociation constant (pKa•) of the intermediate aroxyl radicals (ks-pKa• plots) revealed that the second proton transfer process could potentially be the rate-determining step of the O2•- radical scavenging reaction of phenolic compounds. The ks-Ep plots provide practical information to predict the O2•- radical scavenging activity of plant-derived phenolic compounds based on those molecular structures.
Collapse
Affiliation(s)
- Yasuhiro Sakurai
- National Institute of Technology, Akashi College, Akashi, Hyogo 674-8501, Japan
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shuhei Yamaguchi
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tomoyuki Yamashita
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yao Lu
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Keiko Kuwabara
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tomoko Yamaguchi
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yusuke Miyake
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kenji Kanaori
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Seiya Watanabe
- Department of Bioscience, Graduate School of Agriculture, Ehime University, Matsuyama, Ehime 790-8566, Japan
| | - Kunihiko Tajima
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Department of Bioscience, Graduate School of Agriculture, Ehime University, Matsuyama, Ehime 790-8566, Japan
| |
Collapse
|
2
|
Yang Y, Wang G, Li X, Iradukunda Y, Liu F, Li Z, Gao H, Shi G. Preparation of Electrospun Active Molecules Membrane Application to Atmospheric Free Radicals. MEMBRANES 2022; 12:membranes12050480. [PMID: 35629806 PMCID: PMC9143268 DOI: 10.3390/membranes12050480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/27/2022] [Accepted: 04/27/2022] [Indexed: 12/04/2022]
Abstract
Atmospheric reactive oxygen species (ROS) play a key role in the process of air pollution and oxidative damage to organisms. The analysis of ROS was carried out by the capture-derivative method. Therefore, it is necessary to prepare an effective molecular membrane to trap and detect ROS. Electrospinning membranes were prepared by combining the electrospinning technique with chrysin, baicalein, scutellarin, genistein, quercetin, and baicalin. By comparing the structures of the membranes before and after the reaction, the fluorescence enhancement characteristics of the reactive molecular membranes and the atmospheric radicals were studied. The ability of the active molecular membranes to trap atmospheric radicals was also studied. It was found that the genistein active molecular membrane had good trapping ability in four environments. The fluorescence enhancement rates in ROS, OH radical and O3 simulated environments were 39.32%, 7.99% and 11.92%, respectively. The fluorescence enhancement rate in atmospheric environment was 16.16%. Indeed, the sites where the atmospheric radicals react with the active molecular membranes are discussed. It is found that it is mainly related to the 5,7 phenolic hydroxyl of ring A, catechol structure and the coexistence structure of 4′ phenolic hydroxyl of ring B and 7 phenolic hydroxyl of ring A. Therefore, the genistein molecular membrane has shown great potential in its trapping ability and it is also environmentally friendly.
Collapse
Affiliation(s)
- Yang Yang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Guoying Wang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
- Correspondence:
| | - Xin Li
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Yves Iradukunda
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
| | - Fengshuo Liu
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Zhiqian Li
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Hongli Gao
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Gaofeng Shi
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| |
Collapse
|
3
|
Kuwabara K, Nishio N, Nakano R, Sakurai Y, Yamaguchi T, Miyake Y, Kanaori K, Tajima K. Stopped-flow-optical Absorption and -ESR Detection of Rutin (quercetin-3-O-rutinoside) B-ring Catechol Aroxyl Radicals Generated during Redox Reaction between Rutin and O2−• Radical in DMSO. CHEM LETT 2022. [DOI: 10.1246/cl.220009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Keiko Kuwabara
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Natsuki Nishio
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Ryota Nakano
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yasuhiro Sakurai
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tomoko Yamaguchi
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yusuke Miyake
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kenji Kanaori
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kunihiko Tajima
- Department of Molecular Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| |
Collapse
|