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Losada-Barreiro S, Paiva-Martins F, Bravo-Díaz C. Analysis of the Efficiency of Antioxidants in Inhibiting Lipid Oxidation in Terms of Characteristic Kinetic Parameters. Antioxidants (Basel) 2024; 13:593. [PMID: 38790698 PMCID: PMC11118216 DOI: 10.3390/antiox13050593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/02/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
In this work, we aim to find physical evidence demonstrating the crucial role that the effective concentration of antioxidants (AOs) present at the interfacial region of emulsions has in controlling the inhibition of the lipid oxidation reaction. We prepared a series of antioxidants of different hydrophobicities derived from chlorogenic and protocatechuic acids. We first monitored, in intact emulsions, the (sigmoidal) production of conjugated dienes and determined the corresponding induction times, tind. Independently, we determined the effective concentrations of the antioxidants in the same intact emulsions. Results show that both the length of the induction periods and the antioxidant interfacial concentrations parallel each other, with a maximum at the octyl-dodecyl derivatives. The ratio between the interfacial antioxidant concentrations and the induction periods remains constant for all AOs in the same series, so that the rates of initiation of lipid oxidation are the same regardless of the hydrophobicity of the antioxidant employed. The constancy in the rate of initiation provides strong experimental evidence for a direct relationship between interfacial concentrations and antioxidant efficiencies. Results suggest new possibilities to investigate lipid peroxidation under non-forced conditions and are of interest to formulators interested in preparing emulsions with antimicrobial properties.
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Affiliation(s)
- Sonia Losada-Barreiro
- Departamento de Química-Física, Facultad de Química, Universidade de Vigo, 36310 Vigo, Spain;
| | - Fátima Paiva-Martins
- REQUIMTE-LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal;
| | - Carlos Bravo-Díaz
- Departamento de Química-Física, Facultad de Química, Universidade de Vigo, 36310 Vigo, Spain;
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2
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Rodríguez-Blázquez S, Pedrera-Cajas L, Gómez-Mejía E, Vicente-Zurdo D, Rosales-Conrado N, León-González ME, Rodríguez-Bencomo JJ, Miranda R. The Potential of Plum Seed Residue: Unraveling the Effect of Processing on Phytochemical Composition and Bioactive Properties. Int J Mol Sci 2024; 25:1236. [PMID: 38279238 PMCID: PMC11154296 DOI: 10.3390/ijms25021236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/12/2024] [Accepted: 01/17/2024] [Indexed: 01/28/2024] Open
Abstract
Bioactive compounds extracted from plum seeds were identified and quantified, aiming to establish how the brandy manufacturing process affects the properties and possible cascade valorization of seed residues. Extraction with n-hexane using Soxhlet has provided oils rich in unsaturated fatty acids (92.24-92.51%), mainly oleic acid (72-75.56%), which is characterized by its heart-healthy properties. The fat extracts also contain tocopherols with antioxidant and anti-inflammatory properties. All the ethanol-water extracts of the defatted seeds contain neochlorogenic acid (90-368 µg·g-1), chlorogenic acid (36.1-117 µg·g-1), and protocatechuate (31.8-100 µg·g-1) that have an impact on bioactive properties such as antimicrobial and antioxidant. Anti-amyloidogenic activity (25 mg·mL-1) was observed in the after both fermentation and distillation extract, which may be related to high levels of caffeic acid (64 ± 10 µg·g-1). The principal component analysis showed that all plum seed oils could have potential applications in the food industry as edible oils or in the cosmetic industry as an active ingredient in anti-aging and anti-stain cosmetics, among others. Furthermore, defatted seeds, after both fermentation and distillation, showed the greatest applicability in the food and nutraceutical industry as a food supplement or as an additive in the design of active packaging.
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Affiliation(s)
- Sandra Rodríguez-Blázquez
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
- Department of Chemical Engineering and Materials, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain;
| | - Laura Pedrera-Cajas
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
| | - Esther Gómez-Mejía
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
| | - David Vicente-Zurdo
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
- Centre for Metabolomics and Bioanalysis (CEMBIO), Department of Chemistry and Biochemistry, Pharmacy Faculty, San Pablo-CEU University, Boadilla del Monte, 28660 Madrid, Spain
| | - Noelia Rosales-Conrado
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
| | - María Eugenia León-González
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
| | - Juan José Rodríguez-Bencomo
- Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain; (S.R.-B.); (L.P.-C.); (E.G.-M.); (D.V.-Z.); (N.R.-C.); (J.J.R.-B.)
| | - Ruben Miranda
- Department of Chemical Engineering and Materials, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain;
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3
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Gao Z, Ji Z, Wang L, Deng Q, Quek SY, Liu L, Dong X. Improvement of Oxidative Stability of Fish Oil-in-Water Emulsions through Partitioning of Sesamol at the Interface. Foods 2023; 12:foods12061287. [PMID: 36981213 PMCID: PMC10048168 DOI: 10.3390/foods12061287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/11/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
The susceptibility of polyunsaturated fatty acids to oxidation severely limits their application in functional emulsified foods. In this study, the effect of sesamol concentration on the physicochemical properties of WPI-stabilized fish oil emulsions was investigated, focusing on the relationship between sesamol-WPI interactions and interfacial behavior. The results relating to particle size, zeta-potential, microstructure, and appearance showed that 0.09% (w/v) sesamol promoted the formation of small oil droplets and inhibited oil droplet aggregation. Furthermore, the addition of sesamol significantly reduced the formation of hydrogen peroxide, generation of secondary reaction products during storage, and degree of protein oxidation in the emulsions. Molecular docking and isothermal titration calorimetry showed that the interaction between sesamol and β-LG was mainly mediated by hydrogen bonds and hydrophobic interactions. Our results show that sesamol binds to interfacial proteins mainly through hydrogen bonding, and increasing the interfacial sesamol content reduces the interfacial tension and improves the physical and oxidative stability of the emulsion.
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Affiliation(s)
- Zhihui Gao
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Zhongyan Ji
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Leixi Wang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Qianchun Deng
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan 430062, China
| | - Siew Young Quek
- School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand
- Riddet Institute, Palmerston North 4474, New Zealand
| | - Liang Liu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Xuyan Dong
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
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4
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Zhang M, Fan L, Liu Y, Li J. Effects of interface generation, droplet size and antioxidant partitioning on the oxidation rate and oxidative stability of water–in–oil emulsions: A comparison of coarse emulsions and nanoemulsions. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Modification of β-lactoglobulin by phenolic conjugations: Protein structural changes and physicochemical stabilities of stripped hemp oil-in-water emulsions stabilized by the conjugates. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107578] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Bravo-Díaz C. Advances in the control of lipid peroxidation in oil-in-water emulsions: kinetic approaches †. Crit Rev Food Sci Nutr 2022; 63:6252-6284. [PMID: 35104177 DOI: 10.1080/10408398.2022.2029827] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Large efforts have been, and still are, devoted to minimize the harmful effects of lipid peroxidation. Much of the early work focused in understanding both the lipid oxidation mechanisms and the action of antioxidants in bulk solution. However, food-grade oils are mostly present in the form of oil-in-water emulsions, bringing up an increasing complexity because of the three-dimensional interfacial region. This review presents an overview of the kinetic approaches employed in controlling the oxidative stability of edible oil-in-water emulsions and of the main outcomes, with particular emphasis on the role of antioxidants and on the kinetics of the inhibition reaction. Application of physical-organic chemistry methods, such as the pseudophase models to investigate antioxidant partitioning, constitute a remarkable example on how kinetic methodologies contribute to model chemical reactivity in multiphasic systems and to rationalize the role of interfaces, opening new opportunities for designing novel antioxidants with tailored properties and new prospects for modulating environmental conditions in attempting to optimize their efficiency. Here we will summarize the main kinetic features of the inhibition reaction and will discuss on the main factors affecting its rate, including the determination of antioxidant efficiencies from kinetic profiles, structure-reactivity relationships, partitioning of antioxidants and concentration effects.
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Affiliation(s)
- Carlos Bravo-Díaz
- Facultad de Ciencias, Departamento de Química Física, Universidad de Vigo, Vigo, Spain
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7
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Costa M, Losada-Barreiro S, Vicente A, Bravo-Díaz C, Paiva-Martins F. Unexpected Antioxidant Efficiency of Chlorogenic Acid Phenolipids in Fish Oil-in-Water Nanoemulsions: An Example of How Relatively Low Interfacial Concentrations Can Make Antioxidants to Be Inefficient. Molecules 2022; 27:molecules27030861. [PMID: 35164119 PMCID: PMC8838834 DOI: 10.3390/molecules27030861] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 11/26/2022] Open
Abstract
Selecting effective antioxidants is challenging since their efficiency in inhibiting lipid oxidation depends on the rate constants of the chemical reactions involved and their concentration at the reaction site, i.e., at the interfacial region. Accumulation of antioxidants at the interface of emulsions is key to modulate their efficiency in inhibiting lipid oxidation but its control was not well understood, especially in emulsions. It can be optimized by modifying the physicochemical properties of antioxidants or the environmental conditions. In this work, we analyze the effects of surfactant concentration, droplet size, and oil to water ratio on the effective interfacial concentration of a set of chlorogenic acid (CGA) esters in fish oil-in-water (O/W) emulsions and nanoemulsions and on their antioxidant efficiency. A well-established pseudophase kinetic model is used to determine in the intact emulsified systems the effective concentrations of the antioxidants (AOs). The relative oxidative stability of the emulsions is assessed by monitoring the formation of primary oxidation products with time. Results show that the concentration of all AOs at the interfacial region is much higher (20–90 fold) than the stoichiometric one but is much lower than those of other phenolipid series such as caffeic or hydroxytyrosol derivatives. The main parameter controlling the interfacial concentration of antioxidants is the surfactant volume fraction, ΦI, followed by the O/W ratio. Changes in the droplet sizes (emulsions and nanoemulsions) have no influence on the interfacial concentrations. Despite the high radical scavenging capacity of CGA derivatives and their being concentrated at the interfacial region, the investigated AOs do not show a significant effect in inhibiting lipid oxidation in contrast with what is observed using other series of homologous antioxidants with similar reactivity. Results are tentatively interpreted in terms of the relatively low interfacial concentrations of the antioxidants, which may not be high enough to make the rate of the inhibition reaction faster than the rate of radical propagation.
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Affiliation(s)
- Marlene Costa
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
| | - Sonia Losada-Barreiro
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
- Department of Physical Chemistry, Faculty of Chemistry, Universidade de Vigo, 36200 Vigo, Spain;
| | - António Vicente
- Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal;
| | - Carlos Bravo-Díaz
- Department of Physical Chemistry, Faculty of Chemistry, Universidade de Vigo, 36200 Vigo, Spain;
| | - Fátima Paiva-Martins
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
- Correspondence:
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8
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Costa M, Losada-Barreiro S, Paiva-Martins F, Bravo-Díaz C. Effects of Surfactant Volume Fraction on the Antioxidant Efficiency and on The Interfacial Concentrations of Octyl and Tetradecyl p-Coumarates in Corn Oil-in-Water Emulsions. Molecules 2021; 26:molecules26196058. [PMID: 34641602 PMCID: PMC8512349 DOI: 10.3390/molecules26196058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/29/2021] [Accepted: 10/02/2021] [Indexed: 11/23/2022] Open
Abstract
Surfactants have been used for decades in the food industry for the preparation of lipid-based emulsified food stuffs. They play two main roles in the emulsification processes: first they decrease the interfacial tension between the oil and water, facilitating droplet deformation and rupture; second, they reduce droplet coalescence by forming steric barriers. However, addition of surfactants to binary oil-water mixtures also brings up the formation of three-dimensional interfacial layers, surrounding each emulsion droplet, that significantly alter chemical reactivity. This is the case, for instance, in the inhibition reaction between antioxidants and the lipid radicals formed in the course of the spontaneous oxidation reaction of unsaturated lipids, which are commonly employed in the preparation of food-grade emulsions. The rate of the inhibition reaction depends on the effective concentrations of antioxidants, which are mostly controlled by the amount of surfactant employed in the preparation of the emulsion. In this work, we analyze the effects of the surfactant Tween 20 on the oxidative stability and on the effective concentrations of two model antioxidants derived from cinnamic acid, determining their interfacial concentrations in the intact emulsions to avoid disrupting the existing equilibria and biasing results. For this purpose, a recently developed methodology was employed, and experimental results were interpreted on the grounds of a pseudophase kinetic model.
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Affiliation(s)
- Marlene Costa
- REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal; (M.C.); (F.P.-M.)
| | - Sonia Losada-Barreiro
- Departamento de Química-Física, Facultad de Química, Universidade de Vigo, 36310 Vigo, Spain;
| | - Fátima Paiva-Martins
- REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal; (M.C.); (F.P.-M.)
| | - Carlos Bravo-Díaz
- Departamento de Química-Física, Facultad de Química, Universidade de Vigo, 36310 Vigo, Spain;
- Correspondence:
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9
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Costa M, Losada-Barreiro S, Magalhães J, Monteiro LS, Bravo-Díaz C, Paiva-Martins F. Effects of the Reactive Moiety of Phenolipids on Their Antioxidant Efficiency in Model Emulsified Systems. Foods 2021; 10:foods10051028. [PMID: 34068499 PMCID: PMC8150906 DOI: 10.3390/foods10051028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/23/2021] [Accepted: 04/30/2021] [Indexed: 01/02/2023] Open
Abstract
Our previous research was focused on the effects of hydrophobicity on the antioxidant (AO) efficiency of series of homologous antioxidants with the same reactive moieties. In this work we evaluate the antioxidant efficiency of hydrophobic phenolipids in 4:6 olive oil-in-water emulsions, with different phenolic moieties (derived from caffeic, 4-hydroxycinnamic, dihydrocaffeic acids, tyrosol and hydroxytyrosol), with alkyl chains of 8 and 16 carbons, and compare the antioxidant efficiency with that of the parent compounds. All catecholic phenolipids, in particular the C8 derivatives, have proven to be better antioxidants for the oxidative protection of emulsions than their parental compounds with octyl dihydrocafffeate being the most efficient (16-fold increase in relation to the control). To understand the importance of some factors on the antioxidant efficiency of compounds in emulsions, Pearson’s correlation analysis was carried out between antioxidant activity and the first anodic potential (Epa), reducing capacity (FRAP value), DPPH radical scavenging activity (EC50) and the concentration of antioxidants in each region of the emulsified system. Results confirm the importance of the effective concentration of AOs in the interfacial region (AOI) (ρ = 0.820) and of the Epa (ρ = −0.677) in predicting their antioxidant efficiency in olive oil-in-water emulsions.
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Affiliation(s)
- Marlene Costa
- REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Campo Alegre 687, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
| | - Sonia Losada-Barreiro
- REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Campo Alegre 687, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
- Department of Physical-Chemistry, Faculty of Chemistry, Universidade de Vigo, 36310 Vigo, Spain;
| | - Júlia Magalhães
- REQUIMTE/LAQV, Department of Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal;
| | - Luís S. Monteiro
- Chemistry Centre, University of Minho, Gualtar, 4710-057 Braga, Portugal;
| | - Carlos Bravo-Díaz
- Department of Physical-Chemistry, Faculty of Chemistry, Universidade de Vigo, 36310 Vigo, Spain;
| | - Fátima Paiva-Martins
- REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Campo Alegre 687, 4169-007 Porto, Portugal; (M.C.); (S.L.-B.)
- Correspondence:
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10
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Liu R, Xu Y, Chang M, Liu R, Wang X. Interactions between α-tocopherol and γ-oryzanol in oil-in-water emulsions. Food Chem 2021; 356:129648. [PMID: 33819788 DOI: 10.1016/j.foodchem.2021.129648] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/28/2021] [Accepted: 03/11/2021] [Indexed: 12/31/2022]
Abstract
The interaction between antioxidants is affected by many factors, such as concentration, ratio and system. In this study, different concentrations of α-tocopherol and γ-oryzanol showed antagonistic effect in the oil-in-water emulsion, and the distribution of α-tocopherol increased in aqueous phase after combined with γ-oryzanol. The concentration could affect the degree of antagonism. According to fluorescence quenching, cyclic voltammetry measurements and the oxidative decomposition of antioxidants during storage, the inhibitory effect of γ-oryzanol on the regeneration of α-tocopherol was proposed to be responsible for the antagonism. This work can provide suggestions for studying the mechanism of antioxidant interaction in emulsion system.
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Affiliation(s)
- Ruru Liu
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, PR China
| | - Ying Xu
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, PR China
| | - Ming Chang
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, PR China
| | - Ruijie Liu
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, PR China.
| | - Xingguo Wang
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, PR China
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11
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A new family of hydroxytyrosol phenolipids for the antioxidant protection of liposomal systems. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1863:183505. [PMID: 33278346 DOI: 10.1016/j.bbamem.2020.183505] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/19/2020] [Accepted: 11/03/2020] [Indexed: 11/23/2022]
Abstract
Hydroxytyrosol (HT) is a well-known olive oil polyphenol for its high antioxidant capacity and important cardio and neuroprotective effects. However, its use in lipidic systems is limited, due to its hydrophilic character. In this study, we approach the particular structure of xanthophylls and synthetize HT esters specially designed for the protection of liposomal systems. These HT esters contain two polyphenolic moieties separated by a lipophilic alkyl spacer of different length (12, 16 or 22 carbons). To evaluate the antioxidant activity of these compounds against the 2,2'-azobis(2-amidinopropane) hydrochloride induced oxidation, soybean phospholipid liposomes were used. Fluorescence quenching studies were used to assess the insertion of the compounds in the liposomes. The synthetized HT derivatives were able to protect liposomes from induced oxidation when added to the suspensions. The rank of activity was severely influenced by the alkyl chain length of the spacer molecule, being the C12 derivative the most active antioxidant, with an increase in the oxidative stability of liposomes of 2.2 times when compared with the control. The incorporation of compounds during liposome preparation improved the antioxidant capacity of all HT derivatives by about 2.8 times, when compared to the control. This is probably due to a similar transmembrane position with both polyphenolic rings located at the phospholipid polar heads. The synthesis of bis-ester derivatives seems to be a promising strategy to fine-tune antioxidant molecules at biomembranes, thus increasing the oxidative stability of liposomal systems by improving the antioxidant activity of hydrophilic phenolic compounds with high free radical scavenging activity.
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12
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Losada-Barreiro S, Sova M, Mravljak J, Saso L, Bravo-Díaz C. Synthesis, In Vitro Antioxidant Properties and Distribution of a New Cyanothiophene-Based Phenolic Compound in Olive Oil-In-Water Emulsions. Antioxidants (Basel) 2020; 9:antiox9070623. [PMID: 32708549 PMCID: PMC7402159 DOI: 10.3390/antiox9070623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/06/2020] [Accepted: 07/13/2020] [Indexed: 01/13/2023] Open
Abstract
We synthesized and determined the antioxidant activity and distribution of a new cyanothiophene-based compound, N-(3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)-3,5-dihydroxybenzamide (SIM-53B), in intact stripped olive oil-in-water emulsion. The in vitro antioxidant properties of SIM-53B were evaluated and compared to those for Trolox and resveratrol. Addition of an emulsifier (Tween 20) creates a narrow region, the aqueous-oil interface, and the distribution of SIM-53B can be described by two partition constants: PWI (between aqueous/interfacial regions) and POI (between oil/interfacial regions). The effects of emulsifier concentration expressed in terms of the volume fraction, ΦI, and O/W ratio were also evaluated on its distribution. SIM-53B is predominantly distributed (>90%) in the interfacial region of 1:9 (O/W) olive oil-in-water emulsions at the lowest emulsifier volume fraction (ΦI = 0.005) and only a small fraction is located in the aqueous (<5%) and the oil (<5%) regions. Besides, the concentration of SIM-53B in the interfacial region of the emulsions is ~170-190-fold higher than the stoichiometric concentration, emphasizing the compartmentalization effects. Results suggest that the emulsifier volume fraction is a key parameter that may modulate significantly its concentration in the interface. Our study suggests that cyanothiophene-based compounds may be interesting additives for potential lipid protection in biomembranes or other lipid-based systems.
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Affiliation(s)
- Sonia Losada-Barreiro
- Physical Chemistry Department, Chemistry Faculty, University of Vigo, E-36310 Vigo, Spain;
- REQUIMTE-LAQV, Chemistry and Biochemistry Department, Science Faculty, University of Porto, PT-4169-007 Porto, Portugal
- Correspondence: (S.L.-B.); (M.S.)
| | - Matej Sova
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia;
- Correspondence: (S.L.-B.); (M.S.)
| | - Janez Mravljak
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000 Ljubljana, Slovenia;
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, 00185 Rome, Italy;
| | - Carlos Bravo-Díaz
- Physical Chemistry Department, Chemistry Faculty, University of Vigo, E-36310 Vigo, Spain;
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13
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Influence of AO chain length, droplet size and oil to water ratio on the distribution and on the activity of gallates in fish oil-in-water emulsified systems: Emulsion and nanoemulsion comparison. Food Chem 2019; 310:125716. [PMID: 31796227 DOI: 10.1016/j.foodchem.2019.125716] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 09/19/2019] [Accepted: 10/15/2019] [Indexed: 12/21/2022]
Abstract
The distribution of a homologous series of polyphenol derivatives of increasing lipophilicity has been determined in fish oil-in-water emulsions and nanoemulsions by the pseudophase model. One of the hypotheses on which the pseudophase model is based, is that its application is independent of the size of emulsion droplets. In agreement with our hypothesis, results showed that the smaller droplet size found in nanoemulsions does not affect partition constants of gallic acid (GA) and its esters. The antioxidant efficiency of GA and gallates in the emulsified systems used, correlated positively with the concentration of antioxidant at the interfacial region. The increase in the oil/water ratio increased the overall oxidative stability of emulsions but decreased the antioxidant efficiency of the more lipophilic derivatives. This can be assigned to the fact that, increasing the oil phase volume, the interfacial concentration decreased for the more lipophilic antioxidants.
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Pernin A, Bosc V, Soto P, Le Roux E, Maillard M. Lipid Oxidation in Oil‐in‐Water Emulsions Rich in Omega‐3: Effect of Aqueous Phase Viscosity, Emulsifiers, and Antioxidants. EUR J LIPID SCI TECH 2019. [DOI: 10.1002/ejlt.201800462] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Aurélia Pernin
- Ingénierie Procédés AlimentsAgroParisTech, INRAUniversité Paris‐Saclay1 avenue des Olympiades91300 MassyFrance
| | - Véronique Bosc
- Ingénierie Procédés AlimentsAgroParisTech, INRAUniversité Paris‐Saclay1 avenue des Olympiades91300 MassyFrance
| | - Paola Soto
- Ingénierie Procédés AlimentsAgroParisTech, INRAUniversité Paris‐Saclay1 avenue des Olympiades91300 MassyFrance
| | - Even Le Roux
- Ingénierie Procédés AlimentsAgroParisTech, INRAUniversité Paris‐Saclay1 avenue des Olympiades91300 MassyFrance
| | - Marie‐Noëlle Maillard
- Ingénierie Procédés AlimentsAgroParisTech, INRAUniversité Paris‐Saclay1 avenue des Olympiades91300 MassyFrance
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Mitrus O, Żuraw M, Losada-Barreiro S, Bravo-Díaz C, Paiva-Martins F. Targeting Antioxidants to Interfaces: Control of the Oxidative Stability of Lipid-Based Emulsions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:3266-3274. [PMID: 30811186 DOI: 10.1021/acs.jafc.8b06545] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The oxidation of lipid-based emulsions and nanoemulsions strongly affects their overall quality and safety. Moreover, introduction of oxidatively unstable emulsions into biological systems either as an energy source in parenteral nutrition or as delivery systems of bioactives may promote oxidation "in situ" leading to the overproduction of reactive oxygen species, initiating new harmful oxidative reactions and increasing the oxidative damage. Addition of antioxidants, AOs, may help to prevent the oxidative degradation of unsaturated lipids. Nevertheless, prediction of the optimal antioxidant or set of antioxidants and their efficiency is still far from being completely understood because the site of reaction is often uncertain and because the effective concentrations of reactants in the different regions of the emulsion have been frequently overlooked. Furthermore, the absence of quantitative relationships between the hydrophobicity of the antioxidants and their partitioning among the oil, water, and interfacial regions hampers their optimal use. Here we investigated the effects of gallic acid and some of its alkyl derivatives on the oxidative stability of soybean oil-in-water emulsions and determined their effective concentrations in the different regions of the emulsion (aqueous, oil, and interface). The results provide physical evidence for the crucial role played by the interfacial region in the reaction between antioxidants and lipid radicals: a direct relationship between interfacial concentrations and the oxidative stability could be established. The results indicate that AOs accumulate in the interfacial region, where the effective concentration is 20-180 times higher than the stoichiometric concentrations. Control of the hydrophobicity of the AOs and of the surfactant concentration allows control of interfacial concentrations: the lower the concentration of surfactant employed, the higher the effective interfacial concentration.
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Affiliation(s)
- Olga Mitrus
- Universidad de Vigo , Facultad de Química, Departamento de Química-Física , 36310 Vigo , Spain
| | - Malgorzata Żuraw
- Universidad de Vigo , Facultad de Química, Departamento de Química-Física , 36310 Vigo , Spain
| | - Sonia Losada-Barreiro
- Universidad de Vigo , Facultad de Química, Departamento de Química-Física , 36310 Vigo , Spain
- REQUIMTE-LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade do Porto . 4169-007 Porto , Portugal
| | - Carlos Bravo-Díaz
- Universidad de Vigo , Facultad de Química, Departamento de Química-Física , 36310 Vigo , Spain
| | - Fátima Paiva-Martins
- REQUIMTE-LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade do Porto . 4169-007 Porto , Portugal
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Freiría-Gándara J, Losada-Barreiro S, Paiva-Martins F, Bravo-Díaz C. Enhancement of the antioxidant efficiency of gallic acid derivatives in intact fish oil-in-water emulsions through optimization of their interfacial concentrations. Food Funct 2018; 9:4429-4442. [PMID: 30070303 DOI: 10.1039/c8fo00977e] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The antioxidant (AO) efficiencies and the distributions of gallic acid (GA) and a series of alkyl gallates (propyl, PG, butyl, BG, octyl, OG and lauryl, LG) were determined in intact fish oil-in-water emulsions. The efficiency of the AOs in inhibiting the oxidation of the fish oil lipids increases upon increasing AO hydrophobicity up to a maximum (∼3-fold) at the octyl derivative, after which the efficiency decreases (LG). The observed non-linear variation in the efficiency with the AO alkyl chain length parallels those of the percentages of AOs in the interfacial region and of their interfacial concentrations, but does not parallel that of the percentage of AOs in the oil region. The interfacial AO concentrations are 20-100 times greater than the stoichiometric (added) antioxidant concentration, depending on the interfacial surfactant volume fraction ΦI, meanwhile the AO concentrations in the oil are similar or slightly higher (1-6 fold) and the concentrations in the aqueous region are much smaller (0.8-10 fold). The effects of the oil to water (o : w) ratio on the interfacial concentrations are complex and depend on both the hydrophobicity of the AO and ΦI. An increase in the o : w ratio favors incorporation of hydrophilic AOs to the interfacial region of emulsions but it decreases the incorporation of hydrophobic AOs. Results provide, for the first time, experimental evidence supporting the interfacial region of emulsions as the main site of production of lipid radicals. Results also provide physical evidence that the efficiency of AOs depends on their interfacial concentrations, which can be modulated by increasing the hydrophobicity of the AOs and by employing the minimum amount of surfactant necessary to stabilize the emulsions. Changes in the o : w ratio can also be used to modulate the interfacial concentrations of hydrophobic (OG, LG, and to a lesser extent BG) or hydrophilic (GA) AOs, but not those of AOs of intermediate hydrophobicity (PG).
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Affiliation(s)
- J Freiría-Gándara
- Universidad de Vigo, Fac. Química, Dpto. Químic- Física, 36310 Vigo, Spain.
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Ferreira I, Costa M, Losada-Barreiro S, Paiva-Martins F, Bravo-Díaz C. Modulating the interfacial concentration of gallates to improve the oxidative stability of fish oil-in-water emulsions. Food Res Int 2018; 112:192-198. [DOI: 10.1016/j.foodres.2018.06.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/25/2022]
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McClements DJ, Decker E. Interfacial Antioxidants: A Review of Natural and Synthetic Emulsifiers and Coemulsifiers That Can Inhibit Lipid Oxidation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:20-35. [PMID: 29227097 DOI: 10.1021/acs.jafc.7b05066] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
There has been strong interest in developing effective strategies to inhibit lipid oxidation in emulsified food products due to the need to incorporate oxidatively labile bioactive lipids, such as ω-3 fatty acids, conjugated linoleic acids, or carotenoids. Emulsifiers or coemulsifiers can be utilized to inhibit lipid oxidation in emulsions. Both of these molecular types can adsorb to droplet surfaces and inhibit lipid oxidation, but emulsifiers can also stabilize droplets against aggregation whereas coemulsifiers cannot. There are a host of existing emulsifiers, covalent conjugates, or physical complexes that have the potential to inhibit lipid oxidation by a variety of mechanisms. Existing emulsifiers with antioxidant potential consist of surfactants, phospholipids, proteins, polysaccharides, and colloidal particles. Conjugates and complexes are typically formed by covalently or physically linking together a surface-active molecule with an antioxidant molecule. This article reviews the molecular and physicochemical basis for the surface and antioxidant activities of emulsifiers and coemulsifiers, highlights the important properties of interfacial layers that can be engineered to control lipid oxidation, and outlines different kinds of existing emulsifiers, conjugates, and complexes that can be used to inhibit oxidation.
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Affiliation(s)
- David Julian McClements
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
| | - Eric Decker
- Department of Food Science, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States
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Vaisali C, Belur PD, Iyyaswami R. Effectiveness of rutin and its lipophilic ester in improving oxidative stability of sardine oil containing trace water. Int J Food Sci Technol 2017. [DOI: 10.1111/ijfs.13627] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chandrasekar Vaisali
- Department of Chemical Engineering; National Institute of Technology; Mangalore Karnataka 575 025 India
| | - Prasanna D. Belur
- Department of Chemical Engineering; National Institute of Technology; Mangalore Karnataka 575 025 India
| | - Regupathi Iyyaswami
- Department of Chemical Engineering; National Institute of Technology; Mangalore Karnataka 575 025 India
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