1
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Chrysanthou A, Bosch-Fortea M, Nadal C, Zarbakhsh A, Gautrot JE. Interfacial mechanics of β-casein and albumin mixed protein assemblies at liquid-liquid interfaces. J Colloid Interface Sci 2024; 674:379-391. [PMID: 38941932 DOI: 10.1016/j.jcis.2024.06.111] [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: 11/28/2023] [Revised: 06/03/2024] [Accepted: 06/14/2024] [Indexed: 06/30/2024]
Abstract
Protein emulsifiers play an important role in formulation science, from food product development to emerging applications in biotechnologies. The impact of mixed protein assemblies on surface composition and interfacial shear mechanics remains broadly unexplored, in comparison to the impact that formulation has on dilatational mechanics and surface tension or pressure. In this report, we use interfacial shear rheology to quantify the evolution of interfacial shear moduli as a function of composition in bovine serum albumin (BSA)/β-casein mixed assemblies. We present the pronounced difference in mechanics of these two protein, at oil interfaces, and observe the dominance of β-casein in regulating interfacial shear mechanics. This observation correlates well with the strong asymmetry of adsorption of these two proteins, characterised by fluorescence microscopy. Using neutron reflectometry and fluorescence recovery after photobleaching, we examine the architecture of corresponding protein assemblies and their surface diffusion, providing evidence for distinct morphologies, but surprisingly comparable diffusion profiles. Finally, we explore the impact of crosslinking and sequential protein adsorption on the interfacial shear mechanics of corresponding assemblies. Overall, this work indicates that, despite comparable surface densities, BSA and β-casein assemblies at liquid-liquid interfaces display almost 2 orders of magnitude difference in interfacial shear storage modulus and markedly different viscoelastic profiles. In addition, co-adsorption and sequential adsorption processes are found to further modulate interfacial shear mechanics. Beyond formulation science, the understanding of complex mixed protein assemblies and mechanics may have implications for the stability of emulsions and may underpin changes in the mechanical strength of corresponding interfaces, for example in tissue culture or in physiological conditions.
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Affiliation(s)
- Alexandra Chrysanthou
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Minerva Bosch-Fortea
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Clemence Nadal
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Ali Zarbakhsh
- School of Physical and Chemical Sciences, Department of Chemistry, Queen Mary University of London, Mile End Road, E1 4NS London, United Kingdom
| | - Julien E Gautrot
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom.
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2
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Stroinski DR, Petersen K, Lewis GE. Enhancing casein micelle dissociation in diluted skim milk systems using combined processing techniques. J Dairy Sci 2024:S0022-0302(24)00871-3. [PMID: 38825143 DOI: 10.3168/jds.2024-24850] [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: 02/29/2024] [Accepted: 04/14/2024] [Indexed: 06/04/2024]
Abstract
The present work aims to evaluate the dissociation of casein micelles in diluted skim milk (SM) systems after undergoing solvent- or emulsifying salt-based dissociation coupled with ultra-high-pressure homogenization (UHPH). Specifically, Part I evaluated dilute SM solutions combined with varying ethanol concentrations (0- 60%) at varying temperatures (5 - 65°C) in combination with UHPH (100-300 MPa), and Part II evaluated dilute SM solutions combined with varying concentrations (0-100 mM) of either sodium hexametaphosphate (SHMP) or sodium citrate (SC) in combination with UHPH (100-300 MPa). In Part I, high concentrations of ethanol (40-60% vol/vol) at elevated temperatures (45-65°C) achieved extensive dissociation of casein micelles, especially in combination with UHPH at ≥200 MPa, as shown by an ca. 6-fold reduction in sample absorbance and an ca. 3-fold reduction in casein particle size compared with the control (ca. dilute SM, 65°C) under optimum conditions (dilute SM, 60% ethanol, 65°C, ≥ 200 MPa). In Part II, the level of casein micelle dissociation using emulsifying salts (ES) was dependent on the ES type and concentration. Considerable casein micelle dissociation in dilute SM systems was achieved with SHMP concentrations ≥1 mM and SC concentrations ≥10 mM, resulting in decreased sample absorbance (>6-fold decrease in absorbance), bimodal casein size distributions, and increased hydrophobicity (ca. 2-fold increase in intrinsic fluorescence) compared with the control (dilute SM). This dissociation was further enhanced with UHPH (≥200 MPa). These results indicate that both solvent- and ES-based casein dissociation techniques can be optimized when used in combination with UHPH. Together, these processing techniques can be used to extensively dissociate casein micelles with the potential to use these altered systems for value-added applications such as functional ingredients or encapsulation agents.
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Affiliation(s)
- D R Stroinski
- Department of Animal and Food Science, University of Wisconsin - River Falls, River Falls, WI 54022
| | - K Petersen
- Department of Animal and Food Science, University of Wisconsin - River Falls, River Falls, WI 54022
| | - G E Lewis
- Department of Animal and Food Science, University of Wisconsin - River Falls, River Falls, WI 54022.
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3
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Jennings CC, Freidenberger M, Christensen SA, Conlin J, Freidenberger O, Kenealey JD. Thermal characterization and separation of whey proteins by differential scanning calorimetry. Food Chem 2024; 441:138347. [PMID: 38183724 DOI: 10.1016/j.foodchem.2023.138347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/16/2023] [Accepted: 12/30/2023] [Indexed: 01/08/2024]
Abstract
Most commercially available whey products contain a mixture of 6-7 whey proteins; however, there is an increased focus on using the individual whey proteins for their unique biological activities. Before extracting individual whey proteins for use, it is important to quantify how much of a particular protein is present in whey mixtures as well as if the protein is still structurally folded. We first characterized the denaturation temperature and enthalpy values for the six purified whey proteins at six pHs (3-9) and under ion chelation using a nano-differential scanning calorimeter (DSC). From the individual protein scans, we determined the optimal condition for detecting all 6 proteins on a single DSC scan was whey in an EDTA MOPs pH 6.7 buffer.
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Affiliation(s)
- Charity C Jennings
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, UT 84606, United States
| | - McCall Freidenberger
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, UT 84606, United States
| | - Shawn A Christensen
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, UT 84606, United States
| | - Joy Conlin
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, UT 84606, United States
| | - Olivia Freidenberger
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, UT 84606, United States
| | - Jason D Kenealey
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, UT 84606, United States.
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4
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Cai Z, Wei Y, Shi A, Zhong J, Rao P, Wang Q, Zhang H. Correlation between interfacial layer properties and physical stability of food emulsions: current trends, challenges, strategies, and further perspectives. Adv Colloid Interface Sci 2023; 313:102863. [PMID: 36868168 DOI: 10.1016/j.cis.2023.102863] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 02/16/2023] [Accepted: 02/18/2023] [Indexed: 03/02/2023]
Abstract
Emulsions are thermodynamically unstable systems that tend to separate into two immiscible phases over time. The interfacial layer formed by the emulsifiers adsorbed at the oil-water interface plays an important role in the emulsion stability. The interfacial layer properties of emulsion droplets have been considered the cutting-in points that influence emulsion stability, a traditional motif of physical chemistry and colloid chemistry of particular significance in relation to the food science and technology sector. Although many attempts have shown that high interfacial viscoelasticity may contribute to long-term emulsion stability, a universal relationship for all cases between the interfacial layer features at the microscopic scale and the bulk physical stability of the emulsion at the macroscopic scale remains to be established. Not only that, but integrating the cognition from different scales of emulsions and establishing a unified single model to fill the gap in awareness between scales also remain challenging. In this review, we present a comprehensive overview of recent progress in the general science of emulsion stability with a peculiar focus on interfacial layer characteristics in relation to the formation and stabilization of food emulsions, where the natural origin and edible safety of emulsifiers and stabilizers are highly requested. This review begins with a general overview of the construction and destruction of interfacial layers in emulsions to highlight the most important physicochemical characteristics of interfacial layers (formation kinetics, surface load, interactions among adsorbed emulsifiers, thickness and structure, and shear and dilatational rheology), and their roles in controlling emulsion stability. Subsequently, the structural effects of a series of typically dietary emulsifiers (small-molecule surfactants,proteins, polysaccharides, protein-polysaccharide complexes, and particles) on oil-water interfaces in food emulsions are emphasized. Finally, the main protocols developed for modifying the structural characteristics of adsorbed emulsifiers at multiple scales and improving the stability of emulsions are highlighted. Overall, this paper aims to comprehensively study the literature findings in the past decade and find out the commonality of multi-scale structures of emulsifiers, so as to deeply understand the common characteristics and emulsification stability behaviour of adsorption emulsifiers with different interfacial layer structures. It is difficult to say that there has been significant progress in the underlying principles and technologies in the general science of emulsion stability over the last decade or two. However, the correlation between interfacial layer properties and physical stability of food emulsions promotes revealing the role of interfacial rheological properties in emulsion stability, providing guidance on controlling the bulk properties by tuning the interfacial layer functionality.
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Affiliation(s)
- Zhixiang Cai
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yue Wei
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Aimin Shi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, P.O. Box 5109, Beijing 100193, China
| | - Jian Zhong
- Xinhua Hospital, Shanghai Institute for Pediatric Research, Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Pingfan Rao
- Food Nutrition Sciences Centre, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Qiang Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, P.O. Box 5109, Beijing 100193, China.
| | - Hongbin Zhang
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, China..
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5
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Lajnaf R, Attia H, Ayadi MA. Technological properties and biological activities of camel α-lactalbumin - A review. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2022.105563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Fan Y, Li G, Yi J, Huang H. Structural characteristics, emulsifying and foaming properties of laccase-crosslinked bovine α-lactalbumin mediated by caffeic acid. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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7
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Effect of Hofmeister series anions on freeze-thaw stability of emulsion stabilized with whey protein isolates. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.108015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Huang H, Yi J, Fan Y. Influence of peroxyl radical-induced oxidation on structural characteristics, emulsifying, and foaming properties of α-lactalbumin. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Lajnaf R, Picart-Palmade L, Attia H, Marchesseau S, Ayadi M. Foaming and air-water interfacial properties of camel milk proteins compared to bovine milk proteins. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Effect of moderate electric fields on the structural and gelation properties of pea protein isolate. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.102959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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11
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Shi R, Liu Y, Ma Y, Zhao P, Jiang Z, Hou J. pH-Dependent Binding Behavior of the α-Lactalbumin/Glycyrrhizic Acid Complex in Relation to Their Foaming Characteristics in Bulk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3252-3262. [PMID: 35174703 DOI: 10.1021/acs.jafc.1c04882] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This work aimed to understand the relationships of the interaction mechanism and foaming characteristics of α-lactalbumin (α-La) and glycyrrhizic acid (GA) after acidic (pH 2.5) and neutral (pH 7.0) treatment. The critical aggregation concentration (CAC) of GA in the presence of α-La was 0.6 mM at pH 7.0, while it was 1.0 mM at pH 2.5. Also, in the presence of a GA concentration of 0-15.00 mM, more GA molecules combined onto the α-La surface at pH 2.5 than at pH 7.0, as evident from the binding isotherms. The turbidity and particle size of α-La/GA were greater in acidic solution than those under neutral conditions. This result could be interpreted by the formation of aggregates under higher GA concentration at pH 2.5. Meanwhile, the viscosity of the complex was higher at pH 2.5 than at pH 7.0 in the presence of 3.00-15.00 mM GA, as analyzed from the rheological properties. The foaming ability (FA) of α-La was significantly enhanced in the presence of 10.00 mM GA. Simultaneously, acidic solution could generate a more stable foaming system with a thicker film layer stabilized by the complex compared with neutral solution. These findings could be beneficial for developing a kind of acidic food-grade foaming agent.
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Affiliation(s)
- Ruijie Shi
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Yue Liu
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Yue Ma
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Panpan Zhao
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Zhanmei Jiang
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Juncai Hou
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, P. R. China
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12
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Ho TM, Zou Z, Bansal N. Camel milk: A review of its nutritional value, heat stability, and potential food products. Food Res Int 2022; 153:110870. [DOI: 10.1016/j.foodres.2021.110870] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/23/2021] [Accepted: 12/02/2021] [Indexed: 02/02/2023]
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13
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Jiang Z, Shi R, Ma L, Munkh-Amgalan G, Bilawal A, Hou J, Tian B. Microwave irradiation treatment improved the structure, emulsifying properties and cell proliferation of laccase-crosslinked α-lactalbumin. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.107036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Bu D, Tu ZC, Wang H, Hu YM, Sun Q, Liu GX. Insight into the mechanism of d-allose in reducing the allergenicity and digestibility of ultrasound-pretreated α-lactalbumin by high-resolution mass spectrometry. Food Chem 2021; 374:131616. [PMID: 34815116 DOI: 10.1016/j.foodchem.2021.131616] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/30/2021] [Accepted: 11/11/2021] [Indexed: 12/12/2022]
Abstract
The mechanism of d-allose in reducing the allergenicity and digestibility of ultrasound-pretreated α-lactalbumin (α-LA) was studied. The intensity reduction and peak red shift occurred in fluorescence spectra of glycated samples. Enzyme-linked immunosorbent assay and basophil degranulation analysis showed that d-allose significantly reduced the allergenicity of α-LA, and ultrasound-pretreated α-LA showed the lowest allergenicity after glycation. Compared with α-LA, the degree of hydrolysis decreased in glycated samples. Size-exclusion high-performance liquid chromatography showed that the glycated α-LA was resistant to digestive enzymes. The glycated sites and average degree of substitution per peptide molecule were determined using LC Orbitrap MS/MS. These results suggested that the masking of linear allergenic epitopes by glycation could reduce the allergenicity. Therefore, the combination of ultrasound pretreatment and glycation is a potential method to reduce protein allergenicity in food processing and provides a useful approach for the application of rare sugars in food processing.
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Affiliation(s)
- Dan Bu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Zong-Cai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; National R&D Center of Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, China; Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China.
| | - Yue-Ming Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Qing Sun
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Guang-Xian Liu
- Jiangxi Academy of Agricultural Sciences, Nanchang 330299, China.
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15
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Aguiló‐Aguayo I, Álvarez C, Saperas M, Rivera A, Abadias M, Lafarga T. Proteins isolated from
Ganxet
common bean (
Phaseolus vulgaris
L.) landrace: techno‐functional and antioxidant properties. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ingrid Aguiló‐Aguayo
- IRTA Postharvest Programme, Edifici Fruitcentre Parc Científic i Tecnològic Agroalimentari de Lleida Parc de Gardeny Lleida Catalonia 25003 Spain
| | - Carlos Álvarez
- Department of Food Quality and Sensory Analysis Teagasc Food Research Centre Dublin 15 Ireland
| | - Montse Saperas
- Grup de Recerca en Cuina i Gastronomia CETT‐UB Campus Turisme, Hoteleria i Gastronomia, Av. Can Marcet 36‐38 Barcelone 08035 Spain
| | - Ana Rivera
- Miquel Agustí Foundation Campus Baix Llobregat, Esteve Terrades 8 Castelldefels 08860 Spain
- Department of Agri‐Food Engineering and Biotechnology Universitat Politècnica de Catalunya BarcelonaTech Campus Baix Llobregat, Esteve Terrades 8 Castelldefels 08860 Spain
| | - Maribel Abadias
- IRTA Postharvest Programme, Edifici Fruitcentre Parc Científic i Tecnològic Agroalimentari de Lleida Parc de Gardeny Lleida Catalonia 25003 Spain
| | - Tomás Lafarga
- IRTA Postharvest Programme, Edifici Fruitcentre Parc Científic i Tecnològic Agroalimentari de Lleida Parc de Gardeny Lleida Catalonia 25003 Spain
- Department of chemical Engineering University of Almeria Almeria Spain
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16
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Characterization of Conjugates between α-Lactalbumin and Benzyl Isothiocyanate-Effects on Molecular Structure and Proteolytic Stability. Molecules 2021; 26:molecules26206247. [PMID: 34684828 PMCID: PMC8539348 DOI: 10.3390/molecules26206247] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 11/27/2022] Open
Abstract
In complex foods, bioactive secondary plant metabolites (SPM) can bind to food proteins. Especially when being covalently bound, such modifications can alter the structure and, thus, the functional and biological properties of the proteins. Additionally, the bioactivity of the SPM can be affected as well. Consequently, knowledge of the influence of chemical modifications on these properties is particularly important for food processing, food safety, and nutritional physiology. As a model, the molecular structure of conjugates between the bioactive metabolite benzyl isothiocyanate (BITC, a hydrolysis product of the glucosinolate glucotropaeolin) and the whey protein α-lactalbumin (α-LA) was investigated using circular dichroism spectroscopy, anilino-1-naphthalenesulfonic acid fluorescence, and dynamic light scattering. Free amino groups were determined before and after the BITC conjugation. Finally, mass spectrometric analysis of the BITC-α-LA protein hydrolysates was performed. As a result of the chemical modifications, a change in the secondary structure of α-LA and an increase in surface hydrophobicity and hydrodynamic radii were documented. BITC modification at the ε-amino group of certain lysine side chains inhibited tryptic hydrolysis. Furthermore, two BITC-modified amino acids were identified, located at two lysine side chains (K32 and K113) in the amino acid sequence of α-LA.
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17
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Haller N, Maier I, Kulozik U. Molecular Analytical Assessment of Thermally Precipitated α-Lactalbumin after Resolubilization. Foods 2021; 10:foods10092231. [PMID: 34574341 PMCID: PMC8465387 DOI: 10.3390/foods10092231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/12/2021] [Accepted: 09/15/2021] [Indexed: 11/24/2022] Open
Abstract
Selective thermal precipitation followed by a mechanical separation step is a well described method for fractionation of the main whey proteins, α-lactalbumin (α-la) and β-lactoglobulin (β-lg). By choosing appropriate environmental conditions the thermal precipitation of either α-la or β-lg can be induced. Whereas β-lg irreversibly aggregates, the precipitated α-la can be resolubilized by a subsequent adjustment of the solution’s pH and the ionic composition. This study reports on the analytical characterization of resolubilized α-la compared to its native counterpart as a reference in order to assess whether the resolubilized α-la can be considered close to ‘native’. Turbidity and quantification by RP-HPLC of the resolubilized α-la solutions were used as a measure of solubility in aqueous environment. RP-HPLC was also applied to determine the elution time as a measure for protein’s hydrophobicity. DSC measurement was performed to determine the denaturation peak temperature of resolubilized α-la. FTIR spectroscopy provided insights in the secondary structure. The refolding of α-la achieved best results using pH 8.0 and a 3-fold stoichiometric amount of Ca2+ per α-la molecule. The results showed that the mechanism of aggregation induced by gentle thermal treatment under acidic conditions with subsequent mechanical separation is reversible to a certain extent, however, the exact native conformation was not restored.
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18
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Fan Y, Peng G, Pang X, Wen Z, Yi J. Physicochemical, emulsifying, and interfacial properties of different whey protein aggregates obtained by thermal treatment. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111904] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Quevedo M, Karbstein HP, Emin MA. Concentration-dependent changes in the reaction behavior of whey proteins: Diffusion-controlled or transition state-controlled reactions? Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Interfacial properties of milk proteins: A review. Adv Colloid Interface Sci 2021; 295:102347. [PMID: 33541692 DOI: 10.1016/j.cis.2020.102347] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 12/22/2022]
Abstract
The interfacial properties of dairy proteins are of great interest to the food industry. Food manufacturing involves various environmental conditions and multiple processes that significantly alter the structure and colloidal stability of food materials. The effects of concentration, pH, heat treatment, addition of salts etc., have considerable influence on the surface activity of proteins and the mechanical properties of the interfacial protein films. Studies to date have established some understanding of the links between environmental and processing related parameters and their impacts on interfacial behavior. Improvement in knowledge may allow better design of interfacial protein structures for different food applications. This review examines the effects of environmental and processing conditions on the interfacial properties of dairy proteins with emphasis on interfacial tension dynamics, dilatational and surface shear rheological properties. The most commonly used surface analytical techniques along with relevant methods are also addressed.
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21
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Taboada ML, Heiden‐Hecht T, Brückner‐Gühmann M, Karbstein HP, Drusch S, Gaukel V. Spray drying of emulsions: Influence of the emulsifier system on changes in oil droplet size during the drying step. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15753] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Martha L. Taboada
- Institute of Process Engineering in Life Sciences, Chair of Food Process Engineering Karlsruhe Institute of Technology Karlsruhe Germany
| | - Theresia Heiden‐Hecht
- Institute of Food Technology and Food Chemistry, Department of Food Technology and Food Material Science Technische Universität Berlin Berlin Germany
| | - Monika Brückner‐Gühmann
- Institute of Food Technology and Food Chemistry, Department of Food Technology and Food Material Science Technische Universität Berlin Berlin Germany
| | - Heike P. Karbstein
- Institute of Process Engineering in Life Sciences, Chair of Food Process Engineering Karlsruhe Institute of Technology Karlsruhe Germany
| | - Stephan Drusch
- Institute of Food Technology and Food Chemistry, Department of Food Technology and Food Material Science Technische Universität Berlin Berlin Germany
| | - Volker Gaukel
- Institute of Process Engineering in Life Sciences, Chair of Food Process Engineering Karlsruhe Institute of Technology Karlsruhe Germany
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22
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Mantovani RA, Rasera ML, Vidotto DC, Mercadante AZ, Tavares GM. Binding of carotenoids to milk proteins: Why and how. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.01.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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23
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Comparative study on antioxidant, antimicrobial, emulsifying and physico-chemical properties of purified bovine and camel β-casein. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110842] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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24
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Huyst AM, Deleu LJ, Luyckx T, Lambrecht MA, Van Camp J, Delcour JA, Van der Meeren P. Influence of hydrophobic interfaces and shear on ovalbumin amyloid-like fibril formation in oil-in-water emulsions. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106327] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Dopierała K, Krajewska M, Prochaska K. Study on pH-Dependent interactions of linoleic acid with α-lactalbumin. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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26
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Lajnaf R, Gharsallah H, Jridi M, Attia H, Ayadi MA. Antioxidant and antibacterial activities, interfacial and emulsifying properties of the apo and holo forms of purified camel and bovine α-lactalbumin. Int J Biol Macromol 2020; 165:205-213. [PMID: 32991904 DOI: 10.1016/j.ijbiomac.2020.09.201] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/19/2020] [Accepted: 09/22/2020] [Indexed: 01/23/2023]
Abstract
The antioxidant and antibacterial activities of camel and bovine α-lactalbumin (α-La) in both calcium-loaded (holo) and calcium-depleted (apo) forms were investigated and compared. Antioxidant assay showed that camel and bovine α-La exhibited significant Ferric-reducing antioxidant power (FRAP), ferrous iron-chelating activity (FCA) and antiradical activities especially in their apo form. Camel apo α-La also exhibited attractive antibacterial activities against Gram-negative bacteria (Pseudomonas aeruginosa) and against fungal pathogens species (Penicillium bilaiae, Aspergillus tamari and Aspergillus sclerotiorum). Likewise, emulsifying properties (emulsification ability (EAI) and stability (ESI) indexes) and the surface characteristics (surface hydrophobicity, ζ-potential and interfacial tension) of the α-La were assessed. Maximum EAI were found at pH 7.0, with higher EAI values for the camel apo α-La (EAI ~19.5 m2/g). This behavior was explained by its relative high surface hydrophobicity and its greater efficiency to reduce the surface tension at the oil-water interface. Furthermore, emulsions were found to be more stable at pH 7.0 compared to pH 5.0 (ESI ~50%) due to the higher electrostatic repulsive forces between oil droplets at pH 7.0 in consistence with the ζ-potential results. This study concluded that the camel apo α-La has antibacterial, antioxidant, and emulsifying properties in agricultural and food industries.
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Affiliation(s)
- Roua Lajnaf
- Alimentary Analysis Unit, National Engineering School of Sfax, BPW 3038 Sfax, Tunisia; Montpellier University, UMR IATE, Place E. Bataillon, 34095 Montpellier Cedex 5, France.
| | - Houda Gharsallah
- Alimentary Analysis Unit, National Engineering School of Sfax, BPW 3038 Sfax, Tunisia; Tunisian Olive Institute, University of Sfax, Tunisia
| | - Mourad Jridi
- National School of Engineering of Sfax (ENIS), University of Sfax, Laboratory of Enzyme Engineering and Microbiology, P.O. Box 1173, Sfax 3038, Tunisia; Higher Institute of Biotechnology of Beja, University of Jendouba, Beja, Tunisia
| | - Hamadi Attia
- Alimentary Analysis Unit, National Engineering School of Sfax, BPW 3038 Sfax, Tunisia
| | - M A Ayadi
- Alimentary Analysis Unit, National Engineering School of Sfax, BPW 3038 Sfax, Tunisia
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27
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Ellouze M, Lajnaf R, Zouari A, Attia H, Ayadi MA, Vial C. Camel α−lactalbumin at the oil−water interface: Effect of protein concentration and pH change on surface characteristics and emulsifying properties. Colloids Surf B Biointerfaces 2020; 189:110654. [DOI: 10.1016/j.colsurfb.2019.110654] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 01/02/2023]
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28
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29
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Lajnaf R, Trigui I, Samet-Bali O, Attia H, Ayadi M. Comparative study on emulsifying and physico-chemical properties of bovine and camel acid and sweet wheys. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2019.109741] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Liu Y, Fan Y, Wu X, Lu Y, Yi J. Colloidal characteristics, emulsifying activities, and interfacial properties of α-lactalbumin–chitosan electrostatic complexes: effects of mass ratio and pH. Food Funct 2020; 11:1740-1753. [DOI: 10.1039/c9fo02504a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Essential hydrophobic carrier properties of α-lactalbumin (α-LA) : chitosan (CHI) including mass ratio and pH have significant impacts on the characteristics, emulsifying activities, and interfacial properties of α-LA–CHI complexes.
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Affiliation(s)
- Yuexiang Liu
- Department of Food Science and Engineering
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- China
| | - Yuting Fan
- School of Public Health
- Health Science Center
- Shenzhen University
- Shenzhen
- China
| | - Xuli Wu
- School of Public Health
- Health Science Center
- Shenzhen University
- Shenzhen
- China
| | - Yujuan Lu
- Department of Food Science and Engineering
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- China
| | - Jiang Yi
- Department of Food Science and Engineering
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- China
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31
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Ellouze M, Vial C, Attia H, Ayadi MA. Camel α−lactalbumin at the oil−water interface: Effect of pH and heat treatment on the structure, surface characteristics and emulsifying properties. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108550] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Conjugation between okra polysaccharide and lactoferrin and its inhibition effect on thermal aggregation of lactoferrin at neutral pH. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.02.082] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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Allahdad Z, Varidi M, Zadmard R, Saboury AA, Haertlé T. Binding of β-carotene to whey proteins: Multi-spectroscopic techniques and docking studies. Food Chem 2019; 277:96-106. [DOI: 10.1016/j.foodchem.2018.10.057] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/10/2018] [Accepted: 10/10/2018] [Indexed: 01/22/2023]
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34
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Azizi M, Li Y, Kaul N, Abbaspourrad A. Study of the Physicochemical Properties of Fish Oil Solid Lipid Nanoparticle in the Presence of Palmitic Acid and Quercetin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:671-679. [PMID: 30614694 DOI: 10.1021/acs.jafc.8b02246] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
ω-3 polyunsaturated fatty acids, naturally found in fish oil, are highly desirable for their associated health benefits. However, they are highly prone to oxidation and degradation. We examined the feasibility of simultaneously adding a solid lipid (palmitic acid) and an antioxidant (quercetin) into a whey-protein-isolate-stabilized solid lipid nanoparticle emulsion for encapsulating fish oil. The goal was to find a rational and new formulation containing both solid lipid and antioxidant that can encapsulate fish oil and give it the best physicochemical stability. Our results show that adding palmitic acid improved the physical stability of the emulsions by decreasing the size of the oil-in-water droplets. On the basis of the thiobarbituric acid reactive substances assay, we found out that at low concentrations of palmitic acid the addition of quercetin played a dominant role in increasing the oxidation stability of fish oil. On the contrary, at high concentrations of palmitic acid, it was palmitic acid that dominated the oxidation inhibition by the solidification of the encapsulates' core.
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Affiliation(s)
- Morteza Azizi
- Department of Food Science, College of Agriculture and Life Science , Cornell University , Ithaca , New York 14853 , United States
| | - Yitong Li
- Department of Food Science, College of Agriculture and Life Science , Cornell University , Ithaca , New York 14853 , United States
| | - Neha Kaul
- Department of Food Science, College of Agriculture and Life Science , Cornell University , Ithaca , New York 14853 , United States
| | - Alireza Abbaspourrad
- Department of Food Science, College of Agriculture and Life Science , Cornell University , Ithaca , New York 14853 , United States
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35
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Tian B, Wang Y, Wang T, Mao L, Lu Y, Wang H, Feng Z. Structure and Functional Properties of Antioxidant Nanoemulsions Prepared with Tea Polyphenols and Soybean Protein Isolate. J Oleo Sci 2019; 68:689-697. [DOI: 10.5650/jos.ess19067] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Bo Tian
- Food Science College, Northeast Agricultural University
| | - Yixiao Wang
- Food Science College, Northeast Agricultural University
| | - Tuanjie Wang
- Food Science College, Northeast Agricultural University
| | - Lijing Mao
- Food Science College, Northeast Agricultural University
| | - Yini Lu
- Food Science College, Northeast Agricultural University
| | - Huiting Wang
- Food Science College, Northeast Agricultural University
| | - Zhibiao Feng
- Chemistry College, Northeast Agricultural University
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36
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Improvement of physicochemical properties of encapsulated echium oil using nanostructured lipid carriers. Food Chem 2018; 246:448-456. [DOI: 10.1016/j.foodchem.2017.12.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 10/30/2017] [Accepted: 12/05/2017] [Indexed: 12/27/2022]
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37
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Gao J, Song J, Du M, Mao X. Bovine α-Lactalbumin Hydrolysates (α-LAH) Ameliorate Adipose Insulin Resistance and Inflammation in High-Fat Diet-Fed C57BL/6J Mice. Nutrients 2018; 10:nu10020242. [PMID: 29473848 PMCID: PMC5852818 DOI: 10.3390/nu10020242] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/27/2018] [Accepted: 01/29/2018] [Indexed: 02/06/2023] Open
Abstract
Obesity-induced adipose inflammation has been demonstrated to be a key cause of insulin resistance. Peptides derived from bovine α-lactalbumin have been shown to inhibit the activities of dipeptidyl peptidase IV (DPP-IV) and angiotensin converting enzyme (ACE), scavenge 2,2'-azinobis [3-ethylbenzothiazoline-6-sulfonate] (ABTS⁺) radical and stimulate glucagon-like peptide-2 secretion. In the present study, the effects of bovine α-lactalbumin hydrolysates (α-LAH) on adipose insulin resistance and inflammation induced by high-fat diet (HFD) were investigated. The insulin resistance model was established by feeding C57BL/6J mice with HFD (60% kcal from fat) for eight weeks. Then, the mice were fed with HFD and bovine α-LAH of different doses (100 mg/kg b.w., 200 mg/kg b.w. and 400 mg/kg b.w.) for another 12 weeks to evaluate its protective effects against HFD-induced insulin resistance. The oral glucose tolerance test (OGTT) and intraperitoneal insulin tolerance test (ipITT) were conducted after intervention with α-LAH for 10 weeks and 11 weeks, respectively. Results showed that bovine α-LAH significantly reduced body weight, blood glucose, serum insulin, and HOMA-IR (homeostatic model assessment of insulin resistance) levels, lowered the area-under-the-curve (AUC) during OGTT and ipITT, and downregulated inflammation-related gene [tumor necrosis factor (TNF)-α, interleukin (IL)-6, monocyte chemoattractant protein (MCP)-1] expression in adipose tissues of HFD-fed C57BL/6J mice. Furthermore, bovine α-LAH also suppressed insulin receptor substrate 1 (IRS-1) serine phosphorylation (Ser307, Ser612), enhanced protein kinase B (known as Akt) phosphorylation, and inhibited the activation of inhibitor of kappaB kinase (IKK) and mitogen activated protein kinase (MAPK) signaling pathways in adipose tissues of HFD-fed C57BL/6J mice. These results suggested that bovine α-LAH could ameliorate adipose insulin resistance and inflammation through IKK and MAPK signaling pathways in HFD-fed C57BL/6J mice.
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Affiliation(s)
- Jing Gao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
- College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, Ministry of Education, China Agricultural University, Beijing 100083, China.
| | - Jiajia Song
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
- College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, Ministry of Education, China Agricultural University, Beijing 100083, China.
| | - Min Du
- Department of Animal Sciences, Washington State University, Pullman, WA 99164, USA.
| | - Xueying Mao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
- College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, Ministry of Education, China Agricultural University, Beijing 100083, China.
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38
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Lajnaf R, Picart-Palmade L, Cases E, Attia H, Marchesseau S, Ayadi M. The foaming properties of camel and bovine whey: The impact of pH and heat treatment. Food Chem 2018; 240:295-303. [DOI: 10.1016/j.foodchem.2017.07.064] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 07/12/2017] [Accepted: 07/12/2017] [Indexed: 10/19/2022]
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39
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Li Q, Zhao Z. Characterization of the Structural and Colloidal Properties of α-Lactalbumin/Chitosan Complexes as a Function of Heating. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:972-978. [PMID: 29301069 DOI: 10.1021/acs.jafc.7b04628] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This research investigated the interaction between α-lactalbumin (α-la) and chitosan at different temperatures. Chitosan was added to α-la solution (5 g L-1) to achieve different α-la/chitosan ratios (8:1, 5:1, and 2:1), which were then subjected to different heating temperatures (20, 70, and 90 °C). The results indicated that a low amount of chitosan (8:1) precipitated α-la molecules. Increasing chitosan to a ratio of 5:1 resulted in exposure of the internal structure of α-la, and those formed complexes had high turbidity and average size, which were decreased by an increasing temperature. A further increase of chitosan to a ratio of 2:1 protected the internal structure of α-la molecules. All samples exhibited a similar adsorption behavior at the air/water interface, but the presence of chitosan significantly increased film elasticity. The produced complexes can be regarded as functional ingredients, which can be used as an emulsifying agent and a delivery material to control the release of bioactive compounds.
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Affiliation(s)
- Quanyang Li
- College of Light Industry and Food Engineering, Guangxi University , Nanning, Guangxi 530004, People's Republic of China
| | - Zhengtao Zhao
- College of Light Industry and Food Engineering, Guangxi University , Nanning, Guangxi 530004, People's Republic of China
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40
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Liu J, Tu Z, Shao YH, Wang H, Liu GX, Sha XM, Zhang L, Yang P. Improved Antioxidant Activity and Glycation of α-Lactalbumin after Ultrasonic Pretreatment Revealed by High-Resolution Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:10317-10324. [PMID: 29092398 DOI: 10.1021/acs.jafc.7b03920] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
High-resolution mass spectrometry was performed to investigate the relationship between bovine α-lactalbumin (α-LA) subjected to ultrasonication and glycation treatment with respect to antioxidant activity. After α-LA was pretreated by ultrasonication combined with glycation, the treated α-LA showed low intrinsic fluorescence emission and high antioxidant activity at increased ultrasonic power levels. Prior to ultrasonic pretreatment, three glycated sites were identified, whereas the number of glycation sites was increased to four, four, five, and six after ultrasonic power at 60, 90, 120, and 150 W/cm2, respectively, for 15 min. Thus, no obvious difference was found among the glycation sites at the ultrasonic power of 60 and 90 W/cm2. The average degree of substitution per peptide molecule of α-LA was used to evaluate the glycation level per glycation site. All the samples pretreated by ultrasonication exhibited a higher glycation level compared with the untreated samples. Ultrasonic power at 150 W/cm2 showed the most highly enhanced glycation extent and antioxidant activity. Therefore, the intensified glycation extent and the conformational changes of protein were responsible for the increase of antioxidant activity of α-LA. Moreover, high-resolution mass spectrometry is an efficient technique to understand the mechanism of the improved antioxidant activity.
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Affiliation(s)
- Jun Liu
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Zongcai Tu
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - Yan-Hong Shao
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang, Jiangxi 330047, China
| | - Guang-Xian Liu
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Xiao-Mei Sha
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Lu Zhang
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
| | - Ping Yang
- College of Chemistry and Chemical Engineering, College of Life Science, Jiangxi Normal University , Nanchang, Jiangxi 330022, China
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41
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Lajnaf R, Picart-Palmade L, Attia H, Marchesseau S, Ayadi M. The effect of pH and heat treatments on the foaming properties of purified α-lactalbumin from camel milk. Colloids Surf B Biointerfaces 2017; 156:55-61. [DOI: 10.1016/j.colsurfb.2017.05.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/28/2017] [Accepted: 05/01/2017] [Indexed: 10/19/2022]
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42
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McClements DJ, Bai L, Chung C. Recent Advances in the Utilization of Natural Emulsifiers to Form and Stabilize Emulsions. Annu Rev Food Sci Technol 2017; 8:205-236. [PMID: 28125353 DOI: 10.1146/annurev-food-030216-030154] [Citation(s) in RCA: 268] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Consumer concern about human and environmental health is encouraging food manufacturers to use more natural and sustainable food ingredients. In particular, there is interest in replacing synthetic ingredients with natural ones, and in replacing animal-based ingredients with plant-based ones. This article provides a review of the various types of natural emulsifiers with potential application in the food industry, including phospholipids, biosurfactants, proteins, polysaccharides, and natural colloidal particles. Increased utilization of natural emulsifiers in food products may lead to a healthier and more sustainable food supply. However, more research is needed to identify, isolate, and characterize new sources of commercially viable natural emulsifiers suitable for food use.
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Affiliation(s)
| | - Long Bai
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01060; .,College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, People's Republic of China
| | - Cheryl Chung
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01060;
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43
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Comparative characterization of the deamidation of carboxylic acid deamidated wheat gluten by altering the processing conditions. Food Chem 2016; 210:520-9. [DOI: 10.1016/j.foodchem.2016.04.113] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 04/23/2016] [Accepted: 04/25/2016] [Indexed: 11/17/2022]
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44
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Influence of sodium nitrite on protein oxidation and nitrosation of sausages subjected to processing and storage. Meat Sci 2016; 116:260-7. [DOI: 10.1016/j.meatsci.2016.01.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/24/2016] [Accepted: 01/30/2016] [Indexed: 12/17/2022]
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45
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Production of high-oleic palm oil nanoemulsions by high-shear homogenization (microfluidization). INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2016.04.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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