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Jiang YL, Chen BL, Yan XK, Xu Y, Zhao CC, Chen ZL, Wang P, Zhang JP, Skibsted LH. Conjugation Length Dependence of Free Radical Scavenging Efficiency of Retinal and Retinylisoflavonoid Homologues. ACS OMEGA 2020; 5:13770-13776. [PMID: 32566842 PMCID: PMC7301560 DOI: 10.1021/acsomega.0c00925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/18/2020] [Indexed: 06/11/2023]
Abstract
Retinal (C20) and the C25 and C30 homologues were compared as radical scavengers together with their C22, C27, and C32 homologues linked with daidzein through a B'3 (isoflavonoid) to oxo-carbon (aldehyde) covalent bond. Oxidation potential in acetonitrile determined by cyclic voltammetry and ionization potential calculated by density functional theory for the aldehydes and dyads (conjugates), of which the two longer are new, decreased linearly with the wavenumber for absorption maximum. The logarithm of the second-order rate constant for scavenging of the ABTS•+ increased linearly with decreasing oxidation potential suggesting that longer conjugation in the antioxidant increases the rate of electron transfer. A similar linear free energy relationship was found for the rate of scavenging DPPH•, including daidzein, which may indicate involvement of hydrogen atom transfer from an isoflavonoid phenol. Prediction of radical scavenging efficiency from visible absorption spectra was demonstrated with the perspective of rational design of bifunctional amphiphilic antioxidants.
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Affiliation(s)
- Yang-Lin Jiang
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Bai-Ling Chen
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiao-Kun Yan
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Yi Xu
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Chen-Chen Zhao
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Zi-Li Chen
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Peng Wang
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Jian-Ping Zhang
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Leif H. Skibsted
- Department
of Food Science, University of Copenhagen, Rolighedsvej 30, Frederiksberg C, Frederiksberg 1958, Denmark
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Línzembold I, Czett D, Böddi K, Kurtán T, Király SB, Gulyás-Fekete G, Takátsy A, Lóránd T, Deli J, Agócs A, Nagy V. Study on the Synthesis, Antioxidant Properties, and Self-Assembly of Carotenoid-Flavonoid Conjugates. Molecules 2020; 25:E636. [PMID: 32024181 PMCID: PMC7038153 DOI: 10.3390/molecules25030636] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 11/23/2022] Open
Abstract
Flavonoids and carotenoids possess beneficial physiological effects, such as high antioxidant capacity, anticarcinogenic, immunomodulatory, and anti-inflammatory properties, as well as protective effects against UV light. The covalent coupling of hydrophobic carotenoids with hydrophilic flavonoids, such as daidzein and chrysin, was achieved, resulting in new amphipathic structures. 7-Azidohexyl ethers of daidzein and chrysin were prepared in five steps, and their azide-alkyne [4 + 2] cycloaddition with pentynoates of 8'-apo-β-carotenol, zeaxanthin, and capsanthin afforded carotenoid-flavonoid conjugates. The trolox-equivalent antioxidant capacity against ABTS•+ radical cation and self-assembly of the final products were examined. The 1:1 flavonoid-carotenoid hybrids generally showed higher antioxidant activity than their parent flavonoids but lower than that of the corresponding carotenoids. The diflavonoid hybrids of zeaxanthin and capsanthin, however, were found to exhibit a synergistic enhancement in antioxidant capacities. ECD (electronic circular dichroism) and UV-vis analysis of zeaxanthin-flavonoid conjugates revealed that they form different optically active J-aggregates in acetone/water and tetrahydrofuran/water mixtures depending on the solvent ratio and type of the applied aprotic polar solvent, while the capsanthin derivatives showed no self-assembly. The zeaxanthin bis-triazole conjugates with daidzein and with chrysin, differing only in the position of a phenolic hydroxyl group, showed significantly different aggregation profile upon the addition of water.
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Affiliation(s)
- Ildikó Línzembold
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - Dalma Czett
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - Katalin Böddi
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary; (T.K.); (S.B.K.)
| | - Sándor Balázs Király
- Department of Organic Chemistry, University of Debrecen, POB 400, H-4002 Debrecen, Hungary; (T.K.); (S.B.K.)
| | - Gergely Gulyás-Fekete
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - Anikó Takátsy
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - Tamás Lóránd
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - József Deli
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
- Department of Pharmacognosy, University of Pécs, Faculty of Pharmacy, Rókus u. 2, H-7624 Pécs, Hungary
| | - Attila Agócs
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
| | - Veronika Nagy
- Department of Biochemistry and Medical Chemistry, University of Pécs, Medical School, Szigeti út 12, H-7624 Pécs, Hungary; (I.L.); (D.C.); (K.B.); (G.G.-F.); (A.T.); (T.L.); (J.D.); (A.A.)
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Papa TBR, Pinho VD, Nascimento ESPD, Santos WG, Burtoloso ACB, Skibsted LH, Cardoso DR. Astaxanthin diferulate as a bifunctional antioxidant. Free Radic Res 2014; 49:102-11. [DOI: 10.3109/10715762.2014.982112] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Hu F, Jia ZY, Liang R, Wang P, Ai XC, Zhang JP, Skibsted LH. β-Carotene as a Membrane Antioxidant Probed by Cholesterol-Anchored Daidzein. J Food Sci 2014; 79:C1688-94. [DOI: 10.1111/1750-3841.12557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 06/08/2014] [Indexed: 12/01/2022]
Affiliation(s)
- Feng Hu
- Dept. of Chemistry; Renmin Univ. of China; Beijing 100872 P.R. China
| | - Zhi-Yu Jia
- Dept. of Chemistry; Renmin Univ. of China; Beijing 100872 P.R. China
| | - Ran Liang
- Dept. of Chemistry; Renmin Univ. of China; Beijing 100872 P.R. China
| | - Peng Wang
- Dept. of Chemistry; Renmin Univ. of China; Beijing 100872 P.R. China
| | - Xi-Cheng Ai
- Dept. of Chemistry; Renmin Univ. of China; Beijing 100872 P.R. China
| | - Jian-Ping Zhang
- Dept. of Chemistry; Renmin Univ. of China; Beijing 100872 P.R. China
| | - Leif H. Skibsted
- Food Chemistry; Dept. of Food Science; Univ. of Copenhagen; Rolighedsvej 30, DK-1958 Frederiksberg C Denmark
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Springer JW, Taniguchi M, Krayer M, Ruzié C, Diers JR, Niedzwiedzki DM, Bocian DF, Lindsey JS, Holten D. Photophysical properties and electronic structure of retinylidene–chlorin–chalcones and analogues. Photochem Photobiol Sci 2014; 13:634-50. [DOI: 10.1039/c3pp50421b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Hu F, Bu YZ, Liang R, Duan RM, Wang S, Han RM, Wang P, Ai XC, Zhang JP, Skibsted LH. Quercetin and daidzein β-apo-14'-carotenoic acid esters as membrane antioxidants. Free Radic Res 2013; 47:413-21. [PMID: 23480575 DOI: 10.3109/10715762.2013.784396] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Esterification by β-apo-14'-carotenoic acid was found to have opposite effects on antioxidant activity of quercetin (at B4', B3' hydroxyl) as of daidzein (at A7 hydroxyl) in phosphatidylcholine liposomes. The daidzein ester had increased activity, while quercetin had a significant decreased activity. Quantum mechanical calculations using density function theory (DFT) indicate a modest decrease in bond dissociation enthalpy, BDE, for (weakest) hydrogen-oxygen phenolic bond in daidzein from 368.4 kJ · mol(- 1) to 367.7 kJ · mol(- 1) compared to a significant increase in quercetin from 329.5 kJ · mol(- 1) to 356.6 kJ · mol(- 1) upon derivatization. These opposite changes in tendency for hydrogen atom transfer from phenolic groups to lipid radicals combined with an increase in A-to-B dihedral angle from 0.0° to 36.4° and in dipole moment from 0.40 D to 6.01 D for quercetin upon derivatization, while less significant for daidzein (36.4°-36.7° and 3.26 D-7.87 D, respectively), together provide a rationale for the opposite effect of esterification on antioxidation.
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Affiliation(s)
- F Hu
- Department of Chemistry, Renmin University of China, Beijing, PR China
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Skibsted LH. Carotenoids in antioxidant networks. Colorants or radical scavengers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:2409-2417. [PMID: 22339058 DOI: 10.1021/jf2051416] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Optical and electronic properties of carotenoids as also reflected in their colors have been fine-tuned through evolution, resulting in a structural diversity important for carotenoid properties as radical scavengers and as quenchers of electronically excited states. Carotenoids form antioxidant networks based on one-electron transfer with other carotenoids depending on the balance between ionization energy and electron affinity of the individual carotenoids as has been demonstrated by real-time kinetic studies and later confirmed by quantum mechanical calculations. The more hydrophilic xanthophylls serve as molecular wiring across membranes in these networks through anchoring in water/lipid interfaces resulting in synergism with more lipophilic carotenoids. Radical scavenging of such networks seems to be thermodynamically controlled according to a two-dimensional classification of potential antioxidants. Carotenoids in birds' plumage, as reflected by their color and color intensity, seem to be indicators of good antioxidant status and health of the bird, and such antioxidant networks appear to be in "equilibrium". Carotenoids are under other conditions involved in networks with other types of antioxidants as in egg yolk and in some fish. For the more hydrophilic (iso)flavonoids and their glycosides, antioxidant synergism through regeneration of the lipophilic carotenoids active as radical scavengers becomes kinetically controlled at interfaces. Carotenoids appear accordingly, and also in food, as antioxidants under two types of conditions: (i) in "equilibrium" with other antioxidants in thermodynamically controlled networks serving as color indicators of good antioxidant status and (ii) as antioxidants active through radical scavenging in networks with kinetically controlled regeneration.
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Affiliation(s)
- Leif H Skibsted
- Food Chemistry, Department of Food Science, University of Copenhagen, Frederiksberg C, Denmark.
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Han RM, Zhang JP, Skibsted LH. Reaction dynamics of flavonoids and carotenoids as antioxidants. Molecules 2012; 17:2140-60. [PMID: 22354191 PMCID: PMC6268464 DOI: 10.3390/molecules17022140] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 01/30/2012] [Accepted: 02/03/2012] [Indexed: 11/16/2022] Open
Abstract
Flavonoids and carotenoids with rich structural diversity are ubiquitously present in the plant kingdom. Flavonoids, and especially their glycosides, are more hydrophilic than most carotenoids. The interaction of flavonoids with carotenoids occurs accordingly at water/lipid interfaces and has been found important for the functions of flavonoids as antioxidants in the water phase and especially for the function of carotenoids as antioxidants in the lipid phase. Based on real-time kinetic methods for the fast reactions between (iso)flavonoids and radicals of carotenoids, antioxidant synergism during protection of unsaturated lipids has been found to depend on: (i) the appropriate distribution of (iso)flavonoids at water/lipid interface, (ii) the difference between the oxidation potentials of (iso)flavonoid and carotenoid and, (iii) the presence of electron-withdrawing groups in the carotenoid for facile electron transfer. For some (unfavorable) combinations of (iso)flavonoids and carotenoids, antioxidant synergism is replaced by antagonism, despite large potential differences. For contact with the lipid phase, the lipid/water partition coefficient is of importance as a macroscopic property for the flavonoids, while intramolecular rotation towards coplanarity upon oxidation by the carotenoid radical cation has been identified by quantum mechanical calculations to be an important microscopic property. For carotenoids, anchoring in water/lipid interface by hydrophilic groups allow the carotenoids to serve as molecular wiring across membranes for electron transport.
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Affiliation(s)
- Rui-Min Han
- Department of Chemistry, Renmin University of China, Zhongguancun Street, No. 59, Haidian District, Beijing, 100872, China
- Authors to whom correspondence should be addressed; (R.-M.H.); (J.-P.Z.); Tel.: +86-10-6251-6604; Fax: +86-10-6251-6444
| | - Jian-Ping Zhang
- Department of Chemistry, Renmin University of China, Zhongguancun Street, No. 59, Haidian District, Beijing, 100872, China
- Authors to whom correspondence should be addressed; (R.-M.H.); (J.-P.Z.); Tel.: +86-10-6251-6604; Fax: +86-10-6251-6444
| | - Leif H. Skibsted
- Food Chemistry, Department of Food Science, University of Copenhagen, Rolighedsvej 30, DK-1958 Frederiksberg C, Denmark;
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