Submitted Successfully!
To reward your contribution, here is a gift for you: A free trial for our video production service.
Thank you for your contribution! You can also upload a video entry or images related to this topic.
Version Summary Created by Modification Content Size Created at Operation
1 + 2510 word(s) 2510 2021-08-20 09:34:39 |
2 format correct Meta information modification 2510 2021-08-23 05:53:50 |

Video Upload Options

Do you have a full video?


Are you sure to Delete?
If you have any further questions, please contact Encyclopedia Editorial Office.
Shubina, V. Antioxidant Properties of Taxifolin. Encyclopedia. Available online: (accessed on 13 June 2024).
Shubina V. Antioxidant Properties of Taxifolin. Encyclopedia. Available at: Accessed June 13, 2024.
Shubina, Victoria. "Antioxidant Properties of Taxifolin" Encyclopedia, (accessed June 13, 2024).
Shubina, V. (2021, August 20). Antioxidant Properties of Taxifolin. In Encyclopedia.
Shubina, Victoria. "Antioxidant Properties of Taxifolin." Encyclopedia. Web. 20 August, 2021.
Antioxidant Properties of Taxifolin

Polyphenols are the most numerous and widely distributed compounds of plant origin. They are involved in various processes of the growth and development of plants, and their protection against unfavorable environmental factors. They enter the body of humans and animals with plant food. The intake of polyphenols or polyphenol-rich food products might be associated with a lower risk of cardiovascular, neurodegenerative, and other diseases. More than 8000 polyphenols have been identified; of these, more than 4000 compounds belong to the group of flavonoids. In nature, polyphenols occur as monomers, oligomers, and polymers (proanthocyanidins, condensed tannins). There is also evidence indicating that, during the storage and aging of food products and beverages with a high content of flavonoids, the latter react with carbonyl compounds such as acetaldehyde, methylglyoxal, glyoxylic acid, and furfurol, which results in the formation of monomeric, oligomeric, and polymeric adducts.

flavonoids glyoxylate-taxifolin condensation product antioxidant activity metal-reducing ability iron-chelating activity ferrozine

1. Overview

It is known that flavonoids can react with toxic carbonyl compounds in the process of the storage, aging, and digestion of flavonoid-rich foods and beverages. However, the effect of these reactions on the antioxidant properties of the polyphenolic fraction and the properties of the resulting products remain poorly studied. The aim of the present work was to study the antioxidant activity of quercetin, taxifolin, catechin, eriodictyol, hesperetin, naringenin and a product of the condensation of taxifolin with glyoxylic acid, as well as to reveal the structure–activity relationship of these polyphenols. It was found that flavonoids containing the catechol moiety exhibited higher antioxidant activity than hesperetin and naringenin. The product showed the highest hydrogen peroxide scavenging activity, a lower metal-reducing and a higher iron-binding ability than catechol-containing flavonoids, and a lipid peroxidation inhibitory activity comparable with that of taxifolin. Thus, the condensation of flavonoids with toxic carbonyl compounds might lead to the formation of products exhibiting high antioxidant activity. Meanwhile, the conditions under which parent flavonoids and their products exhibit the maximal antioxidant activity may differ. The data suggest that the antioxidant profile of the polyphenolic fraction and bioavailability of polyphenols, carbonyl compounds, and metal ions may change when these reactions occur. 

2. Polyphenols

Polyphenols are the most numerous and widely distributed compounds of plant origin [1]. They are involved in various processes of the growth and development of plants [2], and their protection against unfavorable environmental factors [3][4][5]. They enter the body of humans and animals with plant food. The intake of polyphenols or polyphenol-rich food products might be associated with a lower risk of cardiovascular [6][7][8], neurodegenerative [9][10][11][12], and other diseases [6][13][14]. More than 8000 polyphenols have been identified; of these, more than 4000 compounds belong to the group of flavonoids [1]. In nature, polyphenols occur as monomers, oligomers, and polymers (proanthocyanidins, condensed tannins). There is also evidence indicating that, during the storage and aging of food products and beverages with a high content of flavonoids, the latter react with carbonyl compounds such as acetaldehyde, methylglyoxal, glyoxylic acid, and furfurol, which results in the formation of monomeric, oligomeric, and polymeric adducts [15][16][17][18][19][20][21][22].
When entering the human gastrointestinal tract (GIT), polyphenols either remain in the native form or undergo various chemical transformations [23]. Both parent and modified polyphenols are capable of producing local effects. In addition, when entering the circulation, they may induce systemic effects [23]. In the first case, the effect of polyphenols can be appreciable because their concentration in the GIT can reach rather high values [23][24][25]. In particular, they can cause antioxidant effects by interacting with reactive oxygen species (ROS) and ions of metals of variable valency or react with toxic compounds formed during the preparation and digestion of food. This is evidenced by the literature data indicating that the consumption of some food products containing partially oxidized lipids increases the level of toxic hydroperoxides and malonic aldehyde in the stomach and, as a result of their absorption, in the blood plasma. The combined consumption of these food products with polyphenolic compounds substantially reduces or completely prevents the accumulation of these toxic compounds [26][27][28][29][30], producing a protective effect on the body. However, the properties of the resulting compounds as well as the effect of the condensation of polyphenols with carbonyl compounds on the antioxidant properties of the polyphenolic fraction remain poorly understood.
The goal of the present work was to study the antioxidant activity of six structurally similar flavonoids (quercetin, taxifolin, catechin, eriodictyol, hesperetin, naringenin) and a product of the condensation of taxifolin with glyoxylic acid (Figure 1), as well as to reveal the structure–activity relationship of these polyphenols. For this purpose, the ability of the polyphenols to scavenge hydrogen peroxide and inhibit iron-induced lipid peroxidation was examined. In addition, the ability of the polyphenols to reduce iron and cooper ions was estimated.
Figure 1. Structures of polyphenols being tested. The product of the condensation of taxifolin with glyoxylic acid is designated as DfTf.

3. Conclusions

Compounds containing hydroxyl groups in the B ring and being in the ortho-position relative to each other (the catechol fragment) have the most effective antioxidant activity (DfTf, eriodictyol, quercetin, taxifolin, catechin). The methylation of the hydroxyl group at the 4′-position (hesperetin) or the absence of the hydroxyl group at the 3′-position of the B ring (naringenin) leads to a significant reduction in activity. The presence of the 2,3-double bond, or the carbonyl group at the C4 atom, or the aliphatic hydroxyl group at the 3-position of the C ring affects the antioxidant properties of these compounds substantially less. These results agree well with the literature data indicating that quercetin exhibits high scavenging activity toward radicals generated in the aqueous phase (ABTS and DPPH radicals). Catechin and taxifolin show a lower radical scavenging activity than quercetin, whereas hesperetin and naringenin possess a lower antiradical activity than flavonoids mentioned above [31][32]. In spite of the fact that the order of efficacy of flavonoids as radical scavengers can change depending on experimental conditions and methods used by the authors, the most important structural feature of high antiradical activity for these compounds remains the same: the presence of the ortho-dihydroxy group in the B-ring [31][32]. DfTf is a dimer consisting of two taxifolin units, which are linked via the carboxymethine bridge at the C-6 and C-8 positions of the A ring [33]. Consequently, DfTf contains twice as many hydroxyl groups in the structure as the parent flavonoid and, as indicated above, shows the highest hydrogen peroxide scavenging activity. Based on these data and on our previous results, it can be concluded that the effectiveness of DfTf against ROS present in the aqueous phase is higher than that of the parent flavonoid taxifolin [33] and its structural analogs (quercetin, eriodictyol, catechin, hesperetin, and naringenin).
Although the properties of the products of condensation and polymerization of flavonoids remain poorly studied [34][35], there is evidence that these compounds exhibit higher antioxidant, antimicrobal, and enzyme inhibitory activities than parent flavonoids [35][36][37][38][39][40][41]. In particular, the polycondensates of catechin-aldehyde and poly(rutin) show higher superoxide-anion scavenging activity and inhibit the oxidation of human low-density lipoprotein to a greater extent than the monomeric form of flavonoids [36][38][39]. Poly(naringenin) has a greater activity in reducing ABTS and DPPH radicals than naringenin [41]. Proanthocyanidins found in various plants exhibit potent antioxidant activity, which positively correlates with the degree of their polymerization [42][43][44][45]. The products of reactions between quercetin and methylglyoxal (mono- and di-MGO quercetin adducts) retain the ability to scavenge DPPH radical and carbonyl compounds [19]. Thus, the condensation of flavonoids with toxic lipid peroxidation products leads not only to the utilization of the latter, but also to the formation of compounds exhibiting high antioxidant activity.
The antioxidant activity of polyphenols in turn determines their capacity to reduce transition metal ions, which can participate in the Fenton reaction in the presence of hydrogen peroxide, resulting in the initiation and branching of radical chains [46][47]. It is worth noting that, in systems containing polyphenol and transition metal ions, such as Fe (III) and Cu (II), several processes affecting each other may take place simultaneously. In particular, it is known that polyphenols bind transition metal ions, forming complexes with different stoichiometry, a process which highly depends on experimental conditions [48][49][50][51][52]. The redox process leads to changes in the composition and the ratio of the components present in the system. As a result, various complexes are composed, among other things, of oxidized forms of flavonoids and reduced metal ions form [52][53]. On the other hand, complex formation leads to changes in the redox potential of the system and a shift of the equilibrium of the redox reaction. Reagents used for the estimation of the metal-reducing activity of compounds, such as ferrozine and BCDS, firmly bind reduced metal ions (the constant of binding of ferrozine to Fe2+ is logβ = 15.5 [54] and that of BCDS to Cu+ is logβ = 19.8 [55]), minimizing the effects of processes proceeding simultaneously on the result of the measurement. Nevertheless, if a polyphenol is capable of firmly binding metal ions, it may compete with the reagent (ferrozine, BCDS) for the binding of the corresponding metal ions [51][53][56][57][58][59][60]. In these cases, the concentration of ions that was reduced in the presence of the polyphenol may also be considered as a measure of its redox activity in the reaction mixture and can be used to compare the metal-reducing activity of this polyphenol and other compounds. In turn, the model system containing reagents competing with polyphenols for metal ions offers an additional tool for studying polyphenol–metal ion interaction. The data being obtained by means of these systems form the basis necessary for a better understanding of the mechanisms underlying the pro- and antioxidant effects of polyphenols as well as a switch from antioxidant to prooxidant properties of these compounds [46][47].
An examination of the metal-reducing activity of polyphenols showed that copper (II) and iron (III) ions are reduced most effectively in the presence of four compounds containing a catechol fragment: catechin, quercetin, eriodictyol, and taxifolin. In the literature, there is evidence indicating a high metal-reducing activity of catechol-containing compounds (quercetin, taxifolin, catechin) [48][61][62]. However, the order of metal-reducing efficacy of flavonoids may change depending on pH, the flavonoid/metal ion molar ratio, and the time interval [61][62][63]. Most likely, in the first two cases, the changes in the redox potentials of the systems play a key role, while in the last case the decisive factor is the kinetics of the redox reactions [62]. In general, the results obtained here and the available literature data demonstrate high metal-reducing activity of polyphenols containing the catechol group [48][61][62]. DfTf contains two catechol moieties in the structure. Nevertheless, the metal-reducing activity of this compound is lower than that of catechol-containing flavonoids, suggesting that this polyphenol is less likely to act as a prooxidant. The metal-reducing capacity of poly(catechin)s condensed through acetaldehyde was also lower than that of the parent flavonoid and decreased as their molecular weight increased [36]. The copper-reducing activity of poly(naringenin) was lower than that of naringenin [41]. On the other hand, the metal-reducing power of proanthocyanidins increased with increasing size of polyphenols [56].
On the whole, our results support the data indicating that polyphenols (including DfTf) exhibit higher reducing capacity toward copper ions than toward iron ions [48]. It is significant that the concentration of iron (II) ions in the presence of DfTf depends only insignificantly on its concentration in the system, which we have shown earlier at pH 5.4 [33]. This effect is not revealed in the presence of other catechol-containing compounds studied (taxifolin, eriodictyol, catechin, and quercetin) and may be associated with the metal-binding capacity of DfTf and its oxidized forms. This assumption is supported by the fact that ferrozine and DfTf compete with each other for the binding of Fe (II) ions; in this case, DfTf rather firmly binds these ions. To date there are no studies devoted to the evaluation of the stability of complexes formed between the conjugates of flavonoids with carbonyl compounds and transition metal ions. However, in the literature there is evidence indicating that some polyphenols compete for binding of the corresponding ions with well-known chelators, including ferrozine. These are baicalein (acidic and neutral pH) [51][57], quercetin (neutral pH) [51][53][58], isorhamnetin and tamarixetin (neutral pH) [59], isoquercetin (slightly acidic and neutral pH) [58], proanthocyanidins [56], and tannic acid [60]. Therefore, both monomeric and polymeric polyphenols are capable of firmly binding transition metal ions. Nevertheless, the data available in the literature do not enable one to directly estimate the impact of condensation reactions on the metal-binding capacity of the polyphenolic fraction. Here, we demonstrate for the first time that the interaction of taxifolin with glyoxylic acid leads to the formation of a product (DfTf) exhibiting higher metal-binding activity in comparison not only to the parent flavonoid but also to its structural analog quercetin, which possesses higher metal-binding capacity than taxifolin [51]. Taking into account the structural features of polyphenols and the data presented in the literature, several iron binding sites of DfTf can be proposed: (1) the 4-carbonyl group in the C ring and the 5-hydroxyl group of the A ring; (2) the 4-carbonyl group in the C ring and the 3-hydroxyl group of the C ring; and (3) the 3′- and 4′-hydroxy groups of the B ring [46][49][51][64]. Our previous results have shown that naringenin lacking the 3-hydroxyl group in the C ring and 3′-hydroxy groups in the B ring [49][50] are able to form complexes with iron (II) and copper (I) ions, suggesting that the coordination of metal ions involves the carbonyl and 3-hydroxyl groups. It may be assumed that the coordination of metal ions in DfTf-iron complexes occurs at the same positions. Taxifolin also forms complexes with iron (II) and copper (I) ions [49][50]. With due regard for the stoichiometry of the complexes, it may be concluded that, in contrast to naringenin, one molecule of taxifolin is capable of binding two metal ions [49][50], indicating that taxifolin has two coordination sites. Presumably, DfTf has similar coordination sites. In favor of this suggestion are our previous data indicating that DfTf is able to bind up to four iron (II) ions [33]. Supposing that one metal ion is coordinated at the carbonyl group in the fourth position of the C ring and at the 5-OH-group, it is more likely that the other ion is coordinated at the 3′- and 4′-hydroxy groups of the B ring. Nevertheless, the involvement of the 3-hydroxyl and 4-oxo groups in the complex formation by the polyphenols cannot be excluded.
A study of LPO in the presence of polyphenols and iron (II) ions showed that quercetin, catechin, eriodictyol, and taxifolin (compounds containing a catechol fragment) are effective inhibitors of LPO and exert similar inhibitory effects. Other studies on the effects of flavonoids on the lipid peroxidation demonstrated a different order of the effectiveness of these compounds, which depends on the system used [65][66]. Thus, Shahidi and coworkers have shown that quercetin and taxifolin exhibit similar antioxidant activity in a lipid system [67], while in another study quercetin inhibited the lipid peroxidation to a lesser extent than taxifolin [68]. Quercetin better protects lipids from oxidation induced by ultraviolet radiation or Fe (II) than catechin [66]. In addition, quercetin prevents the autooxidation of rat cerebral membranes better than hesperetin and naringenin [65]. On the other hand, hesperetin prevents linoleate peroxidation induced by Fe (II) better than quercetin [65]. On the whole, the data indicate that compounds containing the ortho-dihydroxy group exhibit a high lipid peroxidation inhibitory activity [32][69][70].


  1. Tsao, R. Chemistry and biochemistry of dietary polyphenols. Nutrients 2010, 2, 1231–1246.
  2. Gould, K.S.; Lister, C. Flavonoid functions in plants. In Flavonoids: Chemistry, Biochemistry and Applications; Andersen, O.M., Markham, K.R., Eds.; CRC Press: Boca Raton, FL, USA, 2006; p. 1237. ISBN 978-0-8493-2021-7.
  3. Mathesius, U. Flavonoid functions in plants and their interactions with other organisms. Plants 2018, 7, 30.
  4. Šamec, D.; Karalija, E.; Šola, I.; Vujčić Bok, V.; Salopek-Sondi, B. The role of polyphenols in abiotic stress response: The influence of molecular structure. Plants 2021, 10, 118.
  5. Tuladhar, P.; Sasidharan, S.; Saudagar, P. Role of phenols and polyphenols in plant defense response to biotic and abiotic stresses. In Biocontrol Agents and Secondary Metabolites; Elsevier: Amsterdam, The Netherlands, 2021; pp. 419–441. ISBN 978-0-12-822919-4.
  6. Tresserra-Rimbau, A.; Rimm, E.B.; Medina-Remón, A.; Martínez-González, M.A.; de la Torre, R.; Corella, D.; Salas-Salvadó, J.; Gómez-Gracia, E.; Lapetra, J.; Arós, F.; et al. Inverse Association between habitual polyphenol intake and incidence of cardiovascular events in the predimed study. Nutr. Metab. Cardiovasc. Dis. 2014, 24, 639–647.
  7. Cassidy, A.; Bertoia, M.; Chiuve, S.; Flint, A.; Forman, J.; Rimm, E.B. Habitual intake of anthocyanins and flavanones and risk of cardiovascular disease in men. Am. J. Clin. Nutr. 2016, 104, 587–594.
  8. Johanna Rienks; Janett Barbaresko; Ute nöthlings association of polyphenol biomarkers with cardiovascular disease and mortality risk: A systematic review and meta-analysis of observational studies. Nutrients 2017, 9, 415.
  9. Lindsay, J. Risk factors for alzheimer’s disease: A prospective analysis from the Canadian study of health and aging. Am. J. Epidemiol. 2002, 156, 445–453.
  10. Devore, E.E.; Kang, J.H.; Breteler, M.M.B.; Grodstein, F. Dietary intakes of berries and flavonoids in relation to cognitive decline. Ann. Neurol. 2012, 72, 135–143.
  11. Letenneur, L.; Proust-Lima, C.; Le Gouge, A.; Dartigues, J.; Barberger-Gateau, P. Flavonoid intake and cognitive decline over a 10-year period. Am. J. Epidemiol. 2007, 165, 1364–1371.
  12. Commenges, D.; Scotet, V.; Renaud, S.; Jacqmin-Gadda, H.; Barberger-Gateau, P.; Dartigues, J.-F. Intake of flavonoids and risk of dementia. Eur. J. Epidemiol. 2000, 16, 357–363.
  13. Vauzour, D.; Rodriguez-Mateos, A.; Corona, G.; Oruna-Concha, M.J.; Spencer, J.P.E. Polyphenols and human health: Prevention of disease and mechanisms of action. Nutrients 2010, 2, 1106–1131.
  14. Goetz, M.E.; Judd, S.E.; Hartman, T.J.; McClellan, W.; Anderson, A.; Vaccarino, V. Flavanone intake is inversely associated with risk of incident ischemic stroke in the REasons for Geographic and Racial Differences in Stroke (REGARDS) study. J. Nutr. 2016, 146, 2233–2243.
  15. Es-Safi, N.-E.; Cheynier, V.; Moutounet, M. Study of the reactions between (+)-catechin and furfural derivatives in the presence or absence of anthocyanins and their implication in food color change. J. Agric. Food Chem. 2000, 48, 5946–5954.
  16. Es-Safi, N.-E.; Cheynier, V.; Moutounet, M. Role of aldehydic derivatives in the condensation of phenolic compounds with emphasis on the sensorial properties of fruit-derived foods. J. Agric. Food Chem. 2002, 50, 5571–5585.
  17. Lo, C.-Y.; Li, S.; Tan, D.; Pan, M.-H.; Sang, S.; Ho, C.-T. Trapping reactions of reactive carbonyl species with tea polyphenols in simulated physiological conditions. Mol. Nutr. Food Res. 2006, 50, 1118–1128.
  18. Totlani, V.M.; Peterson, D.G. Epicatechin carbonyl-trapping reactions in aqueous maillard systems: Identification and structural elucidation. J. Agric. Food Chem. 2006, 54, 7311–7318.
  19. Liu, G.; Xia, Q.; Lu, Y.; Zheng, T.; Sang, S.; Lv, L. Influence of quercetin and its methylglyoxal adducts on the formation of α-dicarbonyl compounds in a lysine/glucose model system. J. Agric. Food Chem. 2017, 65, 2233–2239.
  20. Delgado, R.M.; Hidalgo, F.J.; Zamora, R. Antagonism between lipid-derived reactive carbonyls and phenolic compounds in the strecker degradation of amino acids. Food Chem. 2016, 194, 1143–1148.
  21. Hidalgo, F.J.; Delgado, R.M.; Zamora, R. Protective effect of phenolic compounds on carbonyl-amine reactions produced by lipid-derived reactive carbonyls. Food Chem. 2017, 229, 388–395.
  22. Zamora, R.; Aguilar, I.; Hidalgo, F.J. Epoxyalkenal-trapping ability of phenolic compounds. Food Chem. 2017, 237, 444–452.
  23. Oteiza, P.I.; Fraga, C.G.; Mills, D.A.; Taft, D.H. Flavonoids and the gastrointestinal tract: Local and systemic effects. Mol. Asp. Med. 2018, 61, 41–49.
  24. Scalbert, A.; Williamson, G. Dietary intake and bioavailability of polyphenols. J. Nutr. 2000, 130, 2073S–2085S.
  25. Manach, C.; Scalbert, A.; Morand, C.; Rémésy, C.; Jiménez, L. Polyphenols: Food sources and bioavailability. Am. J. Clin. Nutr. 2004, 79, 727–747.
  26. Gorelik, S.; Ligumsky, M.; Kohen, R.; Kanner, J. The stomach as a “bioreactor”: When red meat meets red wine. J. Agric. Food Chem. 2008, 56, 5002–5007.
  27. Gorelik, S.; Ligumsky, M.; Kohen, R.; Kanner, J. A Novel function of red wine polyphenols in humans: Prevention of absorption of cytotoxic lipid peroxidation products. FASEB J. 2008, 22, 41–46.
  28. Kanner, J.; Gorelik, S.; Roman, S.; Kohen, R. Protection by polyphenols of postprandial human plasma and low-density lipoprotein modification: The stomach as a bioreactor. J. Agric. Food Chem. 2012, 60, 8790–8796.
  29. Sirota, R.; Gorelik, S.; Harris, R.; Kohen, R.; Kanner, J. Coffee polyphenols protect human plasma from postprandial carbonyl modifications. Mol. Nutr. Food Res. 2013, 57, 916–919.
  30. Kanner, J.; Selhub, J.; Shpaizer, A.; Rabkin, B.; Shacham, I.; Tirosh, O. Redox homeostasis in stomach medium by foods: The postprandial oxidative stress index (posi) for balancing nutrition and human health. Redox Biol. 2017, 12, 929–936.
  31. Cai, Y.-Z.; Sun, M.; Xing, J.; Luo, Q.; Corke, H. Structure–radical scavenging activity relationships of phenolic compounds from traditional chinese medicinal plants. Life Sci. 2006, 78, 2872–2888.
  32. Rice-Evans, C.A.; Miller, N.J.; Paganga, G. Structure-antioxidant activity relationships of flavonoids and phenolic acids. Free Radic. Biol. Med. 1996, 20, 933–956.
  33. Shubina, V.S.; Shatalin, Y.V. Antioxidant and iron-chelating properties of taxifolin and its condensation product with glyoxylic acid. J. Food Sci. Technol. 2017, 54, 1467–1475.
  34. Latos-Brozio, M.; Masek, A. Structure-activity relationships analysis of monomeric and polymeric polyphenols (quercetin, rutin and catechin) obtained by various polymerization methods. Chem. Biodivers. 2019, 16.
  35. Hashemi Gahruie, H.; Niakousari, M. Antioxidant, antimicrobial, cell viability and enzymatic inhibitory of antioxidant polymers as biological macromolecules. Int. J. Biol. Macromol. 2017, 104, 606–617.
  36. Chung, J.E.; Kurisawa, M.; Kim, Y.-J.; Uyama, H.; Kobayashi, S. Amplification of antioxidant activity of catechin by polycondensation with acetaldehyde. Biomacromolecules 2004, 5, 113–118.
  37. Kim, Y.-J.; Chung, J.E.; Kurisawa, M.; Uyama, H.; Kobayashi, S. Superoxide anion scavenging and xanthine oxidase inhibition of (+)-catechin-aldehyde polycondensates. amplification of the antioxidant property of (+)-catechin by polycondensation with aldehydes. Biomacromolecules 2004, 5, 547–552.
  38. Kim, Y.-J.; Uyama, H.; Kobayashi, S. Inhibition effects of (+)-catechin–aldehyde polycondensates on proteinases causing proteolytic degradation of extracellular matrix. Biochem. Biophys. Res. Commun. 2004, 320, 256–261.
  39. Kurisawa, M.; Chung, J.E.; Uyama, H.; Kobayashi, S. Enzymatic synthesis and antioxidant properties of poly(rutin). Biomacromolecules 2003, 4, 1394–1399.
  40. Latos-Brozio, M.; Masek, A.; Piotrowska, M. Thermally stable and antimicrobial active poly(catechin) obtained by reaction with a cross-linking agent. Biomolecules 2020, 11, 50.
  41. Latos-Brozio, M.; Masek, A.; Piotrowska, M. Novel polymeric biomaterial based on naringenin. Materials 2021, 14, 2142.
  42. Falleh, H.; Ksouri, R.; Boulaaba, M.; Guyot, S.; Abdelly, C.; Magné, C. Phenolic nature, occurrence and polymerization degree as marker of environmental adaptation in the edible halophyte mesembryanthemum edule. S. Afr. J. Bot. 2012, 79, 117–124.
  43. Jerez, M.; Touriño, S.; Sineiro, J.; Torres, J.L.; Núñez, M.J. Procyanidins from pine bark: Relationships between structure, composition and antiradical activity. Food Chem. 2007, 104, 518–527.
  44. Spranger, I.; Sun, B.; Mateus, A.M.; de Freitas, V.; Ricardo-da-Silva, J.M. Chemical characterization and antioxidant activities of oligomeric and polymeric procyanidin fractions from grape seeds. Food Chem. 2008, 108, 519–532.
  45. Zhou, H.-C.; Tam, N.F.; Lin, Y.-M.; Ding, Z.-H.; Chai, W.-M.; Wei, S.-D. Relationships between degree of polymerization and antioxidant activities: A study on proanthocyanidins from the leaves of a medicinal mangrove plant ceriops tagal. PLoS ONE 2014, 9, e107606.
  46. Jomová, K.; Hudecova, L.; Lauro, P.; Simunkova, M.; Alwasel, S.H.; Alhazza, I.M.; Valko, M. A switch between antioxidant and prooxidant properties of the phenolic compounds myricetin, morin, 3′,4′-dihydroxyflavone, taxifolin and 4-hydroxy-coumarin in the presence of copper(ii) ions: A spectroscopic, absorption titration and dna damage study. Molecules 2019, 24, 4335.
  47. Simunkova, M.; Barbierikova, Z.; Jomova, K.; Hudecova, L.; Lauro, P.; Alwasel, S.H.; Alhazza, I.; Rhodes, C.J.; Valko, M. Antioxidant vs. prooxidant properties of the flavonoid, kaempferol, in the presence of cu(ii) ions: A ros-scavenging activity, fenton reaction and dna damage study. Int. J. Mol. Sci. 2021, 22, 1619.
  48. Mira, L.; Tereza Fernandez, M.; Santos, M.; Rocha, R.; Helena Florêncio, M.; Jennings, K.R. Interactions of flavonoids with iron and copper ions: A mechanism for their antioxidant activity. Free Radic. Res. 2002, 36, 1199–1208.
  49. Shubina, V.S.; Shatalina, Y.V. Absorption spectroscopy study of acid-base and metal-binding properties of flavanones. J. Appl. Spectrosc. 2013, 80, 761–766.
  50. Shubina, V.S.; Kozina, V.I.; Shatalin, Y.V. Effect of complex formation by taxifolin and naringenin with cu(i) ions on the distribution of the components of complexes in the octanol–water system. Russ. J. Bioorganic Chem. 2017, 43, 463–470.
  51. Mladěnka, P.; Macáková, K.; Filipský, T.; Zatloukalová, L.; Jahodář, L.; Bovicelli, P.; Silvestri, I.P.; Hrdina, R.; Saso, L. In vitro analysis of iron chelating activity of flavonoids. J. Inorg. Biochem. 2011, 105, 693–701.
  52. Fernandez, M.T.; Mira, M.L.; Florêncio, M.H.; Jennings, K.R. Iron and copper chelation by flavonoids: An electrospray mass spectrometry study. J. Inorg. Biochem. 2002, 92, 105–111.
  53. Guo, M.; Perez, C.; Wei, Y.; Rapoza, E.; Su, G.; Bou-Abdallah, F.; Chasteen, N.D. Iron-binding properties of plant phenolics and cranberry’s bio-effects. Dalton Trans. 2007, 4951.
  54. Gibbs, C.R. Characterization and application of ferrozine iron reagent as a ferrous iron indicator. Anal. Chem. 1976, 48, 1197–1201.
  55. Xiao, Z.; Brose, J.; Schimo, S.; Ackland, S.M.; La Fontaine, S.; Wedd, A.G. Unification of the copper(i) binding affinities of the metallo-chaperones Atx1, Atox1, and related proteins. J. Biol. Chem. 2011, 286, 11047–11055.
  56. Iglesias, J.; Pazos, M.; Lois, S.; Medina, I. Contribution of galloylation and polymerization to the antioxidant activity of polyphenols in fish lipid systems. J. Agric. Food Chem. 2010, 58, 7423–7431.
  57. Perez, C.A.; Wei, Y.; Guo, M. Iron-binding and anti-fenton properties of baicalein and baicalin. J. Inorg. Biochem. 2009, 103, 326–332.
  58. Catapano, M.; Tvrdý, V.; Karlíčková, J.; Migkos, T.; Valentová, K.; Křen, V.; Mladěnka, P. The stoichiometry of isoquercitrin complex with iron or copper is highly dependent on experimental conditions. Nutrients 2017, 9, 1193.
  59. Lomozová, Z.; Catapano, M.C.; Hrubša, M.; Karlíčková, J.; Macáková, K.; Kučera, R.; Mladěnka, P. Chelation of iron and copper by quercetin b-ring methyl metabolites, isorhamnetin and tamarixetin, and their effect on metal-based fenton chemistry. J. Agric. Food Chem. 2021, 69, 5926–5937.
  60. Lopes, G.K.B.; Schulman, H.M.; Hermes-Lima, M. Polyphenol tannic acid inhibits hydroxyl radical formation from fenton reaction by complexing ferrous ions1this study is dedicated to the memory of botany professor Luiz, F.G. Labouriau (1921–1996).1. Biochim. Biophys. Acta BBA Gen. Subj. 1999, 1472, 142–152.
  61. Macáková, K.; Mladěnka, P.; Filipský, T.; Říha, M.; Jahodář, L.; Trejtnar, F.; Bovicelli, P.; Proietti Silvestri, I.; Hrdina, R.; Saso, L. Iron reduction potentiates hydroxyl radical formation only in flavonols. Food Chem. 2012, 135, 2584–2592.
  62. Firuzi, O.; Lacanna, A.; Petrucci, R.; Marrosu, G.; Saso, L. Evaluation of the antioxidant activity of flavonoids by “ferric reducing antioxidant power” assay and cyclic voltammetry. Biochim. Biophys. Acta BBA Gen. Subj. 2005, 1721, 174–184.
  63. Pulido, R.; Bravo, L.; Saura-Calixto, F. Antioxidant activity of dietary polyphenols as determined by a modified ferric reducing/antioxidant power assay. J. Agric. Food Chem. 2000, 48, 3396–3402.
  64. Říha, M.; Karlíčková, J.; Filipský, T.; Macáková, K.; Rocha, L.; Bovicelli, P.; Silvestri, I.P.; Saso, L.; Jahodář, L.; Hrdina, R.; et al. In vitro evaluation of copper-chelating properties of flavonoids. RSC Adv. 2014, 4, 32628–32638.
  65. Saija, A.; Scalese, M.; Lanza, M.; Marzullo, D.; Bonina, F.; Castelli, F. Flavonoids as antioxidant agents: Importance of their interaction with biomembranes. Free Radic. Biol. Med. 1995, 19, 481–486.
  66. Chen, X.; Ahn, D.U. Antioxidant activities of six natural phenolics against lipid oxidation induced by Fe2+ or ultraviolet light. J. Am. Oil Chem. Soc. 1998, 75, 1717.
  67. Shahidi, F.; Janitha, P.K.; Wanasundara, P.D. Phenolic antioxidants. Crit. Rev. Food Sci. Nutr. 1992, 32, 67–103.
  68. Yun, B.-S.; Lee, I.-K.; Kim, J.-P.; Chung, S.-H.; Shim, G.-S.; Yoo, I.-D. Lipid peroxidation inhibitory activity of some constituents isolated from the stem bark ofeucalyptus globulus. Arch. Pharm. Res. 2000, 23, 147–150.
  69. Brown, J.E.; Kelly, M.F. Inhibition of lipid peroxidation by anthocyanins, anthocyanidins and their phenolic degradation products. Eur. J. Lipid Sci. Technol. 2007, 109, 66–71.
  70. Foti, M.; Piattelli, M.; Baratta, M.T.; Ruberto, G. Flavonoids, coumarins, and cinnamic acids as antioxidants in a micellar system. structure−activity relationship †. J. Agric. Food Chem. 1996, 44, 497–501.
Subjects: Toxicology
Contributor MDPI registered users' name will be linked to their SciProfiles pages. To register with us, please refer to :
View Times: 774
Revisions: 2 times (View History)
Update Date: 23 Aug 2021
Video Production Service