1
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Cheng Y, Ye A, Singh H. Characterizations of emulsion gel formed with the mixture of whey and soy protein and its protein digestion under in vitro gastric conditions. Curr Res Food Sci 2023; 8:100674. [PMID: 38283161 PMCID: PMC10818200 DOI: 10.1016/j.crfs.2023.100674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/26/2023] [Accepted: 12/28/2023] [Indexed: 01/30/2024] Open
Abstract
Partially replacing animal proteins with plant proteins to develop new products has much attention. To get knowledge of their application in emulsion gels, heat-induced composite protein emulsion gels were fabricated using the mixtures of whey protein isolate (WPI) and soy protein isolate (SPI) with the final total protein concentration of 10% (w/w). The water holding capacity (WHC), mechanical and rheological properties and microstructure of mixed protein emulsion gels prepared at different WPI to SPI ratios (100:0, 90:10, 70:30, 50:50, 30:70, 10:90, 0:100, w/w) were investigated. The ratios of WPI to SPI showed little effect on the WHC of the mixed protein emulsion gels (p > 0.05). Increasing the ratio of SPI decreased the hardness and storage modulus (G') of mixed protein emulsion gels, whereas the porosity of mixed protein emulsion gels in the microstructure increased, as shown by CLSM. Both β-lactoglobulin and α-lactalbumin from WPI and 7 S and 11 S from SPI participated in forming the gel matrix of mixed protein emulsion gels. More protein aggregates existed as the gel matrix filler at the high soy protein levels. Interestingly, the G' of mixed protein emulsion gels at the WPI to SPI ratio of 50:50 was higher than the sum of G' of individual WPI and SPI emulsion gels. The whey protein network predominated the gel matrix, while soy protein predominated in the active filling effect. When subjected to an in vitro dynamic gastric digestion model, soy protein in the gels (WPI:SPI = 50:50) degraded faster than whey protein during gastric digestion. This study provided new information on the characteristics of composite protein emulsion gel fabricated with the WPI and SPI mixture.
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Affiliation(s)
- Yu Cheng
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
- Institute of Food Physical Processing, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
- Riddet Institute, Massey University, Private Bag, Palmerston North 4442, 11 222, New Zealand
| | - Aiqian Ye
- Riddet Institute, Massey University, Private Bag, Palmerston North 4442, 11 222, New Zealand
| | - Harjinder Singh
- Riddet Institute, Massey University, Private Bag, Palmerston North 4442, 11 222, New Zealand
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2
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Kar A, Olenskyj AG, Garcia Guerrero M, Graham R, Bornhorst GM. Interplay of egg white gel pH and intragastric pH: Impact on breakdown kinetics and mass transport processes. Food Res Int 2023; 173:113290. [PMID: 37803603 DOI: 10.1016/j.foodres.2023.113290] [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: 04/18/2023] [Revised: 07/13/2023] [Accepted: 07/16/2023] [Indexed: 10/08/2023]
Abstract
Egg white gels have been utilized as a model system to study protein breakdown kinetics based on physical and biochemical breakdown processes during in vitro gastric digestion. Additionally, the impact of regulating intragastric pH on the breakdown kinetic processes was investigated. The present study evaluated the impact of gel pH (based on the pH of protein dispersion prepared at pH 3, 5 and 7.5) and intragastric pH regulation (with or without adjustment to pH 2 during in vitro gastric digestion) on the effective diffusion of gastric juice components (water and HCl), gel softening kinetics during gastric digestion, microstructural analysis using micro- computed tomography and protein hydrolysis in the liquid and solid fraction of egg white gel digesta. Egg white gels were subjected to 30 s oral digestion and 15, 30, 60, 120, 180 or 240 min gastric digestion in a static in vitro gastric digestion model, with or without gastric pH adjustment to pH 2. The gel pH affected all the properties measured during gastric digestion and each gel pH represented a specific driving mechanism for protein breakdown. A lower gel pH (pH 3) demonstrated a higher diffusion of moisture and acid, resulting in faster softening (p < 0.05). An intermediate pH (pH 5) showed greater protein-protein interactions due to the proximity to the isoelectric point of egg white proteins, resulting in very slow softening during digestion (p < 0.05), and a higher pH (pH 7) resulted in higher acid diffusion, intermediate gel hardness and very slow softening kinetics (p < 0.05). The gastric pH adjustment during digestion of egg protein gels affected (p < 0.05) the equilibrium moisture and acid contents as well as protein hydrolysis. The study confirmed that there is an interplay between initial gel pH and the intragastric pH which affected the breakdown kinetics of egg white gels during the gastric digestion process.
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Affiliation(s)
| | | | | | | | - Gail M Bornhorst
- University of California, Davis, USA; Riddet Institute, Palmerston North, New Zealand.
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3
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Dong X, Zhuo H, Wang K, Wu P, Chen XD. Real-time spatial quantification of gastric acid diffusion in whey protein gels with different NaCl concentrations by wide-field fluorescence microscopy. Food Res Int 2023; 169:112828. [PMID: 37254404 DOI: 10.1016/j.foodres.2023.112828] [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: 11/21/2022] [Revised: 03/29/2023] [Accepted: 04/12/2023] [Indexed: 06/01/2023]
Abstract
Gastric acid diffusion and penetration constitute an essential process in the structural breakdown and enzymatic hydrolysis of solid food during digestion. This study aimed to quantify the real-time diffusion and spatial distribution of gastric acids in whey protein isolate (WPI) gels in the presence of 0-0.05 M NaCl during simulated digestion using a wide-field fluorescence microscope. For all the gels regardless of NaCl concentration, the outer surface rapidly developed a near-saturated layer, resulting in a higher normalized gastric acid concentration in the outer layer than in the inner layer. The pH decrease was more significant for the gels at a higher NaCl concentration (i.e., 0.05 M) due to the formation of a more discontinuous and looser network structure that would facilitate acid diffusion into the gel matrix and decrease the gel buffering capacity. Consistently, the effective diffusion coefficient (DA) estimated via the Fick diffusion model was 6.19 × 10-10 m2/s for 0.05 M WPI-RITC gels, significantly higher than 0.015 M (4.46 × 10-10 m2/s) and 0 M (3.54 × 10-10 m2/s) gels. The present study has provided a quantitative understanding of the diffusion process and spatial distribution of gastric acids within the WPI gel matrix in real-time during in vitro gastric digestion as influenced by NaCl concentration.
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Affiliation(s)
- Xue Dong
- Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry Chemical Engineering and Material Science, Soochow University, Suzhou Industrial Park Campus, Jiangsu Province 215123, China; Department of Chemical and Biochemical Engineering Xiamen University, 422, Siming South Road, Xiamen, Fujian Province 361005, China
| | - Haoyu Zhuo
- Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry Chemical Engineering and Material Science, Soochow University, Suzhou Industrial Park Campus, Jiangsu Province 215123, China
| | - Ke Wang
- Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry Chemical Engineering and Material Science, Soochow University, Suzhou Industrial Park Campus, Jiangsu Province 215123, China
| | - Peng Wu
- Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry Chemical Engineering and Material Science, Soochow University, Suzhou Industrial Park Campus, Jiangsu Province 215123, China.
| | - Xiao Dong Chen
- Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry Chemical Engineering and Material Science, Soochow University, Suzhou Industrial Park Campus, Jiangsu Province 215123, China; Department of Chemical and Biochemical Engineering Xiamen University, 422, Siming South Road, Xiamen, Fujian Province 361005, China.
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4
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Yu X, Wang XX, Zou LF, Cai KZ, Pan JZ, Chen CG. Insights into the in vitro digestibility of pork myofibrillar protein with different ionic polysaccharides from the perspective of gel characteristics. Food Chem 2023; 426:136520. [PMID: 37307745 DOI: 10.1016/j.foodchem.2023.136520] [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: 03/01/2023] [Revised: 05/16/2023] [Accepted: 05/30/2023] [Indexed: 06/14/2023]
Abstract
In this work, the simulated gastrointestinal digestion of myofibrillar protein gels (MPGs) with anionic xanthan (XMP) and sodium alginate (SMP)/cationic chitosan (CSMP)/neutral curdlan (CMP) and konjac (KMP) was investigated to develop muscle-gelled foods with good qualities before and after eating. The results indicated that the neutral CMP and KMP groups had higher gel strength and protein digestibility than the CSMP group. Xanthan and sodium alginate facilitated myosin degradation in gastrointestinal digestion because of the weak wraps between protein and anionic polysaccharides, gaining plentiful peptides (1790 and 1692 respectively) with molecular weights below 2000 Da. Chitosan and neutral curdlan could improve the strength of MP gel but inhibited proteolysis and resulted in low contents of released amino acids via the strong cross-linked network blocking trypsin contact. This work provides a theoretical basis for developing low-fat meat products with good qualities and digestion behaviors by simply controlling the ionic types of polysaccharides.
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Affiliation(s)
- Xia Yu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China
| | - Xi-Xi Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China
| | - Li-Fang Zou
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China
| | - Ke-Zhou Cai
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China; Engineering Research Center of Bio-process from Ministry of Education, Hefei University of Technology, Hefei 230009, Anhui Province, PR China
| | - Jing-Zhi Pan
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China; School of Biological Science and Food Engineering, Chuzhou University, Chuzhou 239000, Anhui Province, PR China.
| | - Cong-Gui Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, PR China; Engineering Research Center of Bio-process from Ministry of Education, Hefei University of Technology, Hefei 230009, Anhui Province, PR China.
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5
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Li M, Hou X, Lin L, Jiang F, Qiao D, Xie F. Legume protein/polysaccharide food hydrogels: Preparation methods, improvement strategies and applications. Int J Biol Macromol 2023:125217. [PMID: 37285881 DOI: 10.1016/j.ijbiomac.2023.125217] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/26/2023] [Accepted: 06/02/2023] [Indexed: 06/09/2023]
Abstract
For the development of innovative foods and nutritional fortification, research into food gel is essential. As two types of rich natural gel material, both legume proteins and polysaccharides have high nutritional value and excellent application potential, attracting wide attention worldwide. Research has focused on combining legume proteins with polysaccharides to form hybrid hydrogels as their combinations show improved texture and water retention compared to single legume protein or single polysaccharide gels, and these properties can be tailored for specific applications. This article reviews hydrogels of common legume proteins and discusses heat induction, pH induction, salt ion induction, and enzyme-induced assembly of legume protein/polysaccharide mixtures. The applications of these hydrogels in fat replacement, satiety enhancement, and delivery of bioactive ingredients are discussed. Challenges for future work are also highlighted.
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Affiliation(s)
- Mengying Li
- Glyn O. Phillips Hydrocolloid Research Centre at HBUT, School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Xinran Hou
- Glyn O. Phillips Hydrocolloid Research Centre at HBUT, School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Lisong Lin
- Glyn O. Phillips Hydrocolloid Research Centre at HBUT, School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Fatang Jiang
- Glyn O. Phillips Hydrocolloid Research Centre at HBUT, School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Dongling Qiao
- Glyn O. Phillips Hydrocolloid Research Centre at HBUT, School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, College of Food Science, Southwest University, Chongqing 400715, China.
| | - Fengwei Xie
- School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom.
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6
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Zou L, Yu X, Zhou Y, Chen C, Xiao G. In vitro digestibility of proteins, peptidomic analysis and antioxidant ability of sodium-reduced pork sausage with partial substitution of NaCl by KCl. Meat Sci 2023; 197:109049. [PMID: 36473271 DOI: 10.1016/j.meatsci.2022.109049] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022]
Abstract
High salt (NaCl) consumption can impact on human health, and KCl is the most widely used replacement salt in meat products. This study investigated the effects of 0% NaCl (NS), 3% NaCl (HS), 1.95% NaCl (RS), 1.95% NaCl+1.05% KCl (RS + K) on protein digestibility of pork sausage in vitro. The results indicated that RS + K showed the highest gastrointestinal digestibility (GID) because of the structure of looser cross-linked strands and uniform cavities, while HS exhibited the lowest GID. RS + K released more peptides (2499) during gastrointestinal than NS (2301), RS (2130) and HS (2235), with a higher proportion of peptides with molecular weights <1000 Da, and more unique peptides. Meanwhile, the digestion product of RS + K exhibited excellent radical scavenging activity and improved the antioxidant abilities to reduce oxidative injury which was induced by H2O2 in HepG2 cells. These results demonstrated that partial substitution with KCl can be an effective strategy for improving the digestibility of sodium-reduced gel-type meat products.
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Affiliation(s)
- Lifang Zou
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China
| | - Xia Yu
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China
| | - Yu Zhou
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China
| | - Conggui Chen
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China; Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China.
| | - Guiran Xiao
- China Light Industry Key Laboratory of Meat Microbial Control and Utilization, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People's Republic of China.
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7
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Zhang K, Tian X, Shen R, Zhao K, Wang Y, Zhang Y, Wang W. Delaying In vitro gastric digestion of myofibrillar protein gel using carboxymethylated cellulose nanofibrils: Forming a compact and uniform microstructure. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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8
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Deng R, Mars M, Janssen AE, Smeets PA. Gastric digestion of whey protein gels: A randomized cross-over trial with the use of MRI. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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9
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Hypoglycemic Activity of Self-Assembled Gellan Gum-Soybean Isolate Composite Hydrogel-Embedded Active Substance-Saponin. Foods 2022; 11:foods11223729. [PMID: 36429321 PMCID: PMC9689565 DOI: 10.3390/foods11223729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/14/2022] [Accepted: 11/18/2022] [Indexed: 11/22/2022] Open
Abstract
In order to avoid hemolysis caused by direct dietary of kidney tea saponin, complex gels based on gellan gum (GG) and soybean isolate protein (SPI) loaded with saponin were created in the present study by using a self-assembly technique. Studies were conducted on the rheological characteristics, encapsulation effectiveness, molecular structure, microstructure, and hypoglycemic activity of GG/SPI-saponin gels. Increasing the concentration of SPI helped to enhance the strength and energy storage modulus (G') of the gels, and the incorporation of high acylated saponin allowed the whole gel to undergo sol-gel interconversion. The encapsulation efficiency showed that GG/SPI-saponin was 84.52 ± 0.78% for saponin. Microstructural analysis results suggested that GG and SPI were bound by hydrogen bonds. The in vitro digestion results also indicated that saponin could be well retained in the stomach and subsequently released slowly in the intestine. In addition, the in vitro hypoglycemic activity results showed that the IC50 of encapsulated saponin against α-glucosidase and α-amylase were at 2.4790 mg/mL and 1.4317 mg/mL, respectively, and may be used to replace acarbose for hypoglycemia.
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10
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Dong X, Wu P, Cong H, Chen XD. Mechanistic study on in vitro disintegration and proteolysis of whey protein isolate gels: Effect of the strength of sodium ions. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107862] [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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11
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Wang T, Zhang L, Chen L, Li X. Preparation of Oxidized Starch/β-Lactoglobulin Complex Particles Using Microfluidic Chip for the Stabilization of Astaxanthin Emulsion. Foods 2022; 11:foods11193078. [PMID: 36230154 PMCID: PMC9563734 DOI: 10.3390/foods11193078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 09/26/2022] [Accepted: 09/29/2022] [Indexed: 11/17/2022] Open
Abstract
Here, we designed an oxidized starch/β-lactoglobulin (OS/β-lg) complex colloidal particle using a dual-channel microfluidic chip for the stabilization of astaxanthin emulsion. The effect of the mixing ratio, pH, and the degree of substitution (DS) of the oxidized starch on the formation of OS/β-lg complex particles was investigated in detail. The optimal complexation occurred at a pH of 3.6, a mixing ratio of 2:10, and a DS of 0.72%, giving an ideal colloidal particle with near-neutral wettability. With this optimum agent, the astaxanthin-loaded oil-in-water emulsions were successfully prepared. The obtained emulsions showed the typical non-Newton fluid behavior, and the rheological data met the Herschel–Bulkley model. The microscopic images confirmed the dense adsorption of the particle on the oil/water interface. In vitro release and stability studies demonstrated this compact layer contributed to the controlled-release and excellent stability of astaxanthin emulsions facing heat, ultraviolet, and oxidative intervention. This work suggests the potential of microfluidics for the production of food-grade solid emulsifiers.
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12
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Sun R, Liu W, Kirk TV, Chen XD. A Dual-labeled Fluorescent Probe for Visualization of Dextranase Activity in A Simulated Food Digestion System. Food Chem 2022; 405:134744. [DOI: 10.1016/j.foodchem.2022.134744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 10/15/2022] [Accepted: 10/23/2022] [Indexed: 11/04/2022]
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13
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Li W, Wu Y, Martin GJ, Ashokkumar M. Turbulence-dependent reversible liquid-gel transition of micellar casein-stabilised emulsions. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107819] [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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14
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Deng R, Seimys A, Mars M, Janssen AE, Smeets PA. Monitoring pH and whey protein digestion by TD-NMR and MRI in a novel semi-dynamic in vitro gastric simulator (MR-GAS). Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107393] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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15
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Development and characterization of standardized model, solid foods with varying breakdown rates during gastric digestion. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2021.110827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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17
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Gallego M, Barat JM, Grau R, Talens P. Compositional, structural design and nutritional aspects of texture-modified foods for the elderly. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.12.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Yao K, Guo W, Yao Y, Wu N, Xu M, Zhao Y, Tu Y. Properties, digestion and peptide release of heat-induced duck egg white. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Peptidomic analysis of digested products of surimi gels with different degrees of cross-linking: In vitro gastrointestinal digestion and absorption. Food Chem 2021; 375:131913. [PMID: 34959144 DOI: 10.1016/j.foodchem.2021.131913] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 12/03/2021] [Accepted: 12/18/2021] [Indexed: 12/12/2022]
Abstract
To investigate the cross-linking degree on the in vitro gastrointestinal digestion and absorption properties of surimi gel, three types of surimi gels with low, moderate, and high cross-linking degrees were prepared, and then in vitro digestion models (static and dynamic) and a Caco-2 cell monolayer model combined with LC-MS/MS were used to do peptidomic analysis of digestive and absorbed juices. The results showed that an increase in cross-linking degree promoted the release of peptides after gastrointestinal digestion. These peptides originated from the myosin head and rod, the rod was the main digestion region. More potential bioactive peptides from intestinal digestive juice could be transported through the intestinal epithelium. Compared with static digestion, dynamic digestion digested surimi gels more thoroughly, especially during gastric digestion. This study provides a theoretical basis and guidance for the production of surimi products with higher nutritional value and the in vitro digestion methods of gelatinous foods.
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20
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Li J, Yang Z, Lin X, Wu S, Li G, Li N, Otter D, Zhu F, Hartinger C, Corke H, Hemar Y. In-flow SAXS investigation of whey protein isolate hydrolyzed by bromelain. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Le Feunteun S, Verkempinck S, Floury J, Janssen A, Kondjoyan A, Marze S, Mirade PS, Pluschke A, Sicard J, van Aken G, Grauwet T. Mathematical modelling of food hydrolysis during in vitro digestion: From single nutrient to complex foods in static and dynamic conditions. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.08.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Ge G, Zhao J, Zheng J, Zhao M, Sun W. Pepsin Diffusivity and In Vitro Gastric Digestion of Soymilk as Affected by Binding of Tea Polyphenols to Soy Proteins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:11043-11052. [PMID: 34499500 DOI: 10.1021/acs.jafc.1c04705] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study aimed to investigate the effect of tea polyphenol extract (TPE) on the in vitro gastric digestion of soymilk. Fluorescence recovery after photobleaching was applied to measure pepsin diffusivity in soymilk. The characteristics of soymilk digesta were evaluated by gel electrophoresis, degree of hydrolysis (DH), molecular weight distribution, free amino acid analysis, particle size, antioxidant capacity, and trypsin/chymotrypsin inhibitor activity (TIA/CIA). The binding between soy proteins and tea polyphenols could significantly impair in vitro gastric digestion of soymilk by decreasing pepsin diffusivity from 91.3 to 70.3 μm2/s and DH from 17.13 to 13.93% with 1.2 mg/g TPE addition. Soymilk with 0.6 mg/g TPE addition exhibited low TIA/CIA and a strong antioxidant capacity in gastric digesta, which might be good for the following intestinal digestion. A better understanding of the effect of polyphenol on the digestion of protein-based food may be beneficial to innovation in food manufacturing.
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Affiliation(s)
- Ge Ge
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Jie Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Jiabao Zheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510641, China
| | - Weizheng Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510641, China
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23
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Yang X, Ren Y, Liu H, Huo C, Li L. Differences in the physicochemical, digestion and microstructural characteristics of soy protein gel acidified with lactic acid bacteria, glucono-δ-lactone and organic acid. Int J Biol Macromol 2021; 185:462-470. [PMID: 34147525 DOI: 10.1016/j.ijbiomac.2021.06.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/31/2021] [Accepted: 06/10/2021] [Indexed: 11/25/2022]
Abstract
This study evaluated the differences in the physicochemical, digestion and microstructure of soy protein gels acidified with Lactobacillus casei (L. casei), glucono-δ-lactone (GDL) and citric acid. The maximum acidification rate was as follows: citric acid > GDL > L. casei. The gelation points of L. casei-induced gel (LC gel) and GDL-induced gel (GDL gel) occurred at 74 min and 55 min; however, gelation point of citric acid-induced gel (CA gel) was not detected because acidification was too fast. LC gel showed the high gel hardness (20.40 ± 2.23 g) and water holding capacity (84.58 ± 0.59%). At the end of intestinal digestion, the average particle size of the LC gel was the largest, but there was no significant difference between GDL gel and CA gel. The microstructure of the GDL gel was found to be the densest. Acidification rate was the "key step" of acid-induced gels, while both the proteolytic and exopolysaccharide (EPS) production capacity were involved in LC gel.
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Affiliation(s)
- Xiaoyu Yang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yiming Ren
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Huifang Liu
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Chunyan Huo
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Liang Li
- College of Food Science, Northeast Agricultural University, Harbin 150030, China.
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24
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Hazrati Z, Madadlou A. Gelation by bioactives: Characteristics of the cold-set whey protein gels made using gallic acid. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2020.104952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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25
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Zhang Z, Chen W, Zhou X, Deng Q, Dong X, Yang C, Huang F. Astaxanthin-loaded emulsion gels stabilized by Maillard reaction products of whey protein and flaxseed gum: Physicochemical characterization and in vitro digestibility. Food Res Int 2021; 144:110321. [PMID: 34053526 DOI: 10.1016/j.foodres.2021.110321] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/12/2021] [Accepted: 03/13/2021] [Indexed: 01/29/2023]
Abstract
In order to evaluate the effect of ultrasound and Maillard reaction on the physicochemical properties and gastrointestinal fate of astaxanthin-loaded emulsion gels, the Maillard reaction products (MRPs) of whey protein and flaxseed gum (FG) were prepared by traditional or ultrasonic assisted wet-heating. The MRPs obtained by ultrasonic assisted wet-heating had higher grafting degree and more expanded structures evidenced by the browning intensity, fluorescence intensity and circular dichroism (CD) analysis, thus enhancing its functional properties like solubility and emulsifying capacity. The MRPs improved the water holding capacity, encapsulation efficiency, stability of emulsion gels, in which astaxanthin was wrapped as a model bioactive compound. During the simulated digestion process, the bioaccessibility of loaded astaxanthin reached 72.08% for the emulsion gels stabilized by MRPs. The results highlighted the potential of MRPs in improving functionality of protein and as a delivery carrier of bioactive compounds in food industry.
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Affiliation(s)
- Zhao Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, No. 2 Xudong 2nd Road, Wuhan 430062, China
| | - Wenchao Chen
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, No. 2 Xudong 2nd Road, Wuhan 430062, China
| | - Xin Zhou
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, No. 2 Xudong 2nd Road, Wuhan 430062, China
| | - Qianchun Deng
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, No. 2 Xudong 2nd Road, Wuhan 430062, China
| | - Xuyan Dong
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Chen Yang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, No. 2 Xudong 2nd Road, Wuhan 430062, China.
| | - Fenghong Huang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture and Rural Affairs, No. 2 Xudong 2nd Road, Wuhan 430062, China
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26
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Homer S, Williams R, Williams A, Logan A. WPI Gel Microstructure and Mechanical Behaviour and Their Influence on the Rate of In Vitro Digestion. Foods 2021; 10:foods10051066. [PMID: 34066220 PMCID: PMC8150613 DOI: 10.3390/foods10051066] [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: 03/29/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 11/16/2022] Open
Abstract
The influence of microstructure and mechanical properties on the in vitro digestibility of 15% whey protein isolate (WPI) gels was investigated. Gels were prepared via heat set gelation at three pH values (pH 3, 5 and 7), which produced gels with distinct microstructures and mechanical properties. The gels were minced to simulate an oral/chewing phase, which led to the formation particles of various sizes and textures. The minced gels were passed through either an Infogest (pre-set pH of 3) or Glass stomach (dynamic pH) protocol. Gels were digested in the gastric phase for up to 120 min, at which point the extent of digestion was measured by the amount of filterable nitrogen passing through a sieve. The digesta from both gastric methods were passed through an in vitro simulated intestinal phase. A strong link was found between the elasticity of the initial gel and the gel particle size following simulated oral processing, which significantly (p < 0.01) affected the rate of digestion in the gastric phase. A weaker correlation was also found between the pH of the gels and the extent of gastric digestion. This work highlights the differences in the rate of gastric digestion, arising from oral processing, which can be attributed to the material properties of the substrate.
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27
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Interpenetrating polymer network hydrogels of soy protein isolate and sugar beet pectin as a potential carrier for probiotics. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106453] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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28
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Abstract
Food digestion may be regarded as a physiological interface between food and health. During digestion, the food matrix is broken down and the component nutrients and bioactive compounds are absorbed through a synergy of mechanical, chemical, and biochemical processes. The food matrix modulates the extent and kinetics to which nutrients and bioactive compounds make themselves available for absorption, hence regulating their concentration profile in the blood and their utilization in peripheral tissues. In this review, we discuss the structural and compositional aspects of food that modulate macronutrient digestibility in each step of digestion. We also discuss in silico modeling approaches to describe the effect of the food matrix on macronutrient digestion. The detailed knowledge of how the food matrix is digested can provide a mechanistic basis to elucidate the complex effect of food on human health and design food with improved functionality.
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Affiliation(s)
- Edoardo Capuano
- Food Quality and Design Group, Wageningen University and Research, 6700 AA Wageningen, The Netherlands;
| | - Anja E M Janssen
- Food Processing Engineering Group, Wageningen University and Research, 6700 AA Wageningen, The Netherlands;
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29
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Bayrak M, Mata J, Raynes JK, Greaves M, White J, Conn CE, Floury J, Logan A. Investigating casein gel structure during gastric digestion using ultra-small and small-angle neutron scattering. J Colloid Interface Sci 2021; 594:561-574. [PMID: 33780761 DOI: 10.1016/j.jcis.2021.03.087] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 02/24/2021] [Accepted: 03/15/2021] [Indexed: 11/25/2022]
Abstract
This study aimed to understand the structural devolution of 10% w/w rennet-induced (RG) and transglutaminase-induced acid (TG) gels in H2O and D2O under in vitro gastric conditions with and without pepsin. The real-time devolution of structure at a nano- (e.g. colloidal calcium phosphate (CCP) and micelle) and micro- (gel network) level was determined using ultra-small (USANS) and small-angle neutron scattering (SANS) with electron microscopy. Results demonstrate that gel firmness or elasticity determines disintegration behaviour during simulated mastication and consequently the particle size entering the stomach. Shear of mixing in the stomach, pH, and enzyme activity will also affect the digestion process. Our results suggest that shear of mixing primarily results in erosion at the particle surface and governs gel disintegration behaviour during the early stages of digestion. Pepsin diffusivity, and hence action, occur more readily in the latter stages of gastric digestion via access to the particle interior. This occurs via the progressively larger pores of the looser gel network and channels created within the larger, less dense casein micelles of the RG gels. Gel firmness and brittleness were greater in the D2O samples compared to H2O, facilitating gel disintegration. Despite the higher strength and elasticity of RG compared to TG, the protein network strands of the RG gels become more compact when exposed to the acidic gastric environment with comparatively larger pores observed through SEM imaging. This led to a higher degree of digestibility in RG gels compared to TG gels. This is the first study to examine casein gel structure during simulated gastric digestion using scattering and highlights the benefits of neutron scattering to monitor structural changes during digestion at multiple length scales.
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Affiliation(s)
- Meltem Bayrak
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia; School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia.
| | - Jitendra Mata
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia.
| | - Jared K Raynes
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia.
| | - Mark Greaves
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia.
| | - Jacinta White
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC 3168, Australia.
| | - Charlotte E Conn
- School of Science, STEM College, RMIT University, 124 La Trobe Street, Melbourne, VIC 3000, Australia.
| | | | - Amy Logan
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, Victoria 3030, Australia.
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30
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Yang M, Liu J, Yang X, Li S, Li C, Liu B, Ma S, Liu X, Du Z, Zhang T, Yu Y. Effect of glycation degree on the in vitro simulated gastrointestinal digestion: A promising formulation for egg white gel with controlled digestibility. Food Chem 2021; 349:129096. [PMID: 33561796 DOI: 10.1016/j.foodchem.2021.129096] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/06/2021] [Accepted: 01/10/2021] [Indexed: 10/22/2022]
Abstract
The mechanism between food gelation and its digestibility has attracted increasing attention over the past few decades. This study aimed to evaluate the effect of glycation degree on the gelation and digestibility of egg white gel (EWG) using an in vitro model and a multi-scale characterization of gel structure. Results showed that EWG glycated with increasing d-ribose by covalent bonds exhibited better gelling properties and lower in vitro digestibility according to the appearance of soluble proteins and peptides. Besides, glycation preference for ovotransferrin at lysine might be important for regulating gel structure and proteolysis accessibility via the ratio of fibrous and granular aggregates. Moreover, gel structure was predominant over amino acids modification for digestibility. Binding disorder and steric hindrance could ascribe to the lower digestibility of gels. These findings are enlightening for the formulation and production of food matrix with controlled digestibility through glycation in food and related pharmaceutical fields.
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Affiliation(s)
- Meng Yang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Xiaohan Yang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Shoulu Li
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Chuang Li
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Boqun Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Sitong Ma
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Xuanting Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Zhiyang Du
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China
| | - Yiding Yu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, People's Republic of China; College of Food Science and Engineering, Jilin University, Changchun 130062, People's Republic of China.
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31
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Mennah-Govela YA, Bornhorst GM. Breakdown mechanisms of whey protein gels during dynamic in vitro gastric digestion. Food Funct 2021; 12:2112-2125. [DOI: 10.1039/d0fo03325a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Particle geometry influenced the breakdown mechanisms impacting the pH, pepsin activity, and protein hydrolysis of whey protein gels during dynamic in vitro gastric digestion.
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Affiliation(s)
- Yamile A. Mennah-Govela
- Dept. of Biological and Agricultural Engineering
- 1308 Bainer Hall
- University of California
- Davis
- Davis
| | - Gail M. Bornhorst
- Dept. of Biological and Agricultural Engineering
- 1308 Bainer Hall
- University of California
- Davis
- Davis
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32
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In Vivo Digestion of Egg Products Enriched with DHA: Effect of the Food Matrix on DHA Bioavailability. Foods 2020; 10:foods10010006. [PMID: 33375011 PMCID: PMC7822025 DOI: 10.3390/foods10010006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 12/30/2022] Open
Abstract
The aim of the present study was to determine to what extent the food matrix could affect the release of docosahexaenoic acid (DHA) during digestion and its incorporation into systemic circulation. In this aim, three DHA-enriched egg products having the same composition but different structure were developed: omelet, hard-boiled egg, and mousse. Then, nine pigs fitted with T-shape cannulas at duodenal level and a jugular venous catheter were fed with the DHA-enriched egg products, and duodenal effluents and plasma were collected throughout the postprandial period. Results highlighted an undeniable effect of the food matrix on digestion parameters and DHA bioavailability. The transit of DHA and protein through the duodenum was faster after the ingestion of the mousse than after the ingestion of the omelet and hard-boiled egg. While most of the DHA and protein ingested under the form of mousse had already passed through the duodenum 4.5 h after its ingestion, significantly higher quantities were still present in the case of the omelet and hard-boiled egg. In terms of bioavailability, the omelet was the most efficient vector for delivering DHA into systemic circulation. It supplied 56% and 120% more DHA than the hard-boiled egg and the mousse, respectively.
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33
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Okita A, Takahashi K, Itakura M, Horio A, Yamamoto R, Nakamura Y, Osako K. A novel soft surimi gel with functionality prepared using alcalase for people suffering from dysphagia. Food Chem 2020; 344:128641. [PMID: 33229153 DOI: 10.1016/j.foodchem.2020.128641] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 11/18/2022]
Abstract
In this study, effects of alcalase on physical properties, pepsin digestibility, and antioxidative activity in the heat-induced surimi gel were investigated to develop a novel gel product for people with dysphagia. The heat-induced gelation profile of surimi showed that alcalase activity was maximized at approximately 37 °C. The surimi gel attained an appropriate texture for people with dysphagia, when a combination of 0.3-0.5% alcalase and two-step heating at 37 °C and 90 °C was used. Adding alcalase effectively promoted proteolysis, resulting in softening of the gel. Furthermore, the gel with 0.5% alcalase showed improved pepsin digestibility, when heated at 37 °C and 90 °C. Its antioxidative activity was enhanced by adding 0.5% alcalase. Therefore, a combination of 0.5% alcalase and the two-step heating at 37 °C and 90 °C was useful in improving the physical and functional properties of the surimi gel for people with dysphagia.
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Affiliation(s)
- Ayuki Okita
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Kigen Takahashi
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan.
| | - Mone Itakura
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Ai Horio
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Ruriko Yamamoto
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Yusa Nakamura
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Kazufumi Osako
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
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34
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The importance of swelling for in vitro gastric digestion of whey protein gels. Food Chem 2020; 330:127182. [DOI: 10.1016/j.foodchem.2020.127182] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 05/26/2020] [Accepted: 05/28/2020] [Indexed: 11/23/2022]
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35
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Yan W, Zhang B, Yadav MP, Feng L, Yan J, Jia X, Yin L. Corn fiber gum-soybean protein isolate double network hydrogel as oral delivery vehicles for thermosensitive bioactive compounds. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105865] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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36
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Fang M, Xiong S, Jiang Y, Yin T, Hu Y, Liu R, You J. In Vitro Pepsin Digestion Characteristics of Silver Carp ( Hypophthalmichthys molitrix) Surimi Gels with Different Degrees of Cross-Linking Induced by Setting Time and Microbial Transglutaminase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:8413-8430. [PMID: 32663001 DOI: 10.1021/acs.jafc.0c03014] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surimi gels are favored for their abundant proteins and unique taste. In this study, the pepsin digestion behaviors of surimi gels with different degrees of cross-linking induced by microbial transglutaminase (MTGase) and different setting times were investigated. For gels without (CK group) and with (TG group) MTGase, the slowest digestion rate (tM/2 = 20.13 and 79.19 min for CK and TG group, respectively), the least amino acid concentration (5.32 and 3.73 μmol/mL for CK and TG group, respectively), and the peptide amounts (1355 and 1788 for CK and TG group, respectively) were obtained at a moderate setting time (1-4 h) with the finest microstructure. However, the excessive setting time (8-12 h) formed an inhomogenous network, which accelerated the hydrolysis of gel proteins (tM/2 = 9.40 and 52.33 min for CK and TG group, respectively) and produced more amino acids (6.63 and 5.15 μmol/mL for CK and TG group, respectively) and peptide amounts (1644 and 2143 for CK and TG group, respectively). The above results also demonstrated that the presence of MTGase strengthened the compactness of gels as well as slowed down the digestion process with the release of less amino acids but more peptides. A large proportion of unique peptides were from the tail domain of myosin heavy chain. The discrepancy in bioactive peptides between different gels might be reduced in the subsequent intestinal digestion according to the in silico methods, demonstrating the diminished difference in the gastrointestinal digestion process in the aspect of releasing functional peptides. This study provides the theoretical basis and guideline in the field of gelation food digestion and surimi food industry to produce healthier surimi-based food.
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Affiliation(s)
- Mengxue Fang
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
| | - Shanbai Xiong
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
| | - Yue Jiang
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
| | - Tao Yin
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
| | - Yang Hu
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
| | - Ru Liu
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
| | - Juan You
- College of Food Science and Technology/National R&D Branch Center for Conventional Freshwater Fish Processing (Wuhan), Huazhong Agricultural University, Wuhan, Hubei Province 430070, P. R. China
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37
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Reynaud Y, Lopez M, Riaublanc A, Souchon I, Dupont D. Hydrolysis of plant proteins at the molecular and supra-molecular scales during in vitro digestion. Food Res Int 2020; 134:109204. [PMID: 32517931 DOI: 10.1016/j.foodres.2020.109204] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 03/20/2020] [Accepted: 03/27/2020] [Indexed: 12/13/2022]
Abstract
The digestion of plant protein is highly dependent on multiple factors, with two of the most important being the protein source and the food matrix. The present study investigated the effects of these two factors on the digestion of seitan (a wheat-based food), tofu, soya juice, and a homemade emulsion of soy oil and water that was stabilised with pea protein. The four plant matrices and their respective protein isolates/concentrates (wheat gluten, soya protein, pea protein) were subjected to in vitro static digestion following the INFOGEST consensus protocol. We monitored the release of α-amino groups during digestion. We found that food matrix had a strong influence on protein digestion: soya juice was more hydrolysed than fresh tofu (51.1% versus 33.1%; P = 0.0087), but fresh tofu was more hydrolysed than soya protein isolate (33.1% versus 17.9%; P < 0.0001). Likewise, the pea-protein emulsion was better hydrolysed than the pea-protein isolate (P = 0.0033). Differences were also detected between the two solid foods investigated here: a higher degree of hydrolysis was found for tofu compared to seitan (33.1% versus 11.8%), which was perhaps a function of the presence of numerous dense protein aggregates in the latter but not the former. Furthermore, freeze-drying more than doubled the final degree of hydrolysis of seitan (P < 0.0001), but had no effect on tofu (P = 1.0000). Confocal microscopy revealed that protein networks in freeze-dried seitan were strongly altered with respect to the fresh product; instead, protein networks in freeze-dried and fresh tofu were largely similar. Finally, we found that the protease:protein ratio had a strong effect on the kinetics of proteolysis: a 3.7-fold increase in the concentration of the soya protein isolate with respect to that of the soya juice decreased the final degree of hydrolysis from 50.3 to 17.9% (P = 0.0988).
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Affiliation(s)
- Yohan Reynaud
- IMPROVE SAS, F-80480 Dury, France; STLO, INRA, AGROCAMPUS OUEST, F-35042 Rennes, France.
| | | | | | - Isabelle Souchon
- GMPA, INRA, AgroParisTech, Université Paris Saclay, F-78850 Thiverval-Grignon, France.
| | - Didier Dupont
- STLO, INRA, AGROCAMPUS OUEST, F-35042 Rennes, France.
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38
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Guo Q, Ye A, Singh H, Rousseau D. Destructuring and restructuring of foods during gastric digestion. Compr Rev Food Sci Food Saf 2020; 19:1658-1679. [PMID: 33337100 DOI: 10.1111/1541-4337.12558] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/11/2020] [Accepted: 03/29/2020] [Indexed: 12/15/2022]
Abstract
All foods harbor unique length scale-dependent structural features that can influence the release, transport, and utilization of macro- or micronutrients in the human gastrointestinal tract. In this regard, food destructuring and restructuring processes during gastric passage significantly influence downstream nutrient assimilation and feelings of satiety. This review begins with a synopsis of the effects of oral processing on food structure. Then, stomach-centric factors that contribute to the efficacy of gastric digestion are discussed, and exemplified by comparing the intragastric de- and restructuring of a number of common foods. The mechanisms of how intragastric structuring influences gastric emptying and its relationship to human satiety are then discussed. Finally, recently developed, non-destructive instrumental approaches used to quantitively and qualitatively characterize food behavior during gastric destructuring and restructuring are described.
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Affiliation(s)
- Qing Guo
- College of Food Science and Nutritional Engineering, National Engineering Research Center for Fruits and Vegetables Processing, China Agricultural University, Beijing, 100083, China.,Xinghua Industrial Research Centre for Food Science and Human Health, China Agricultural University, Xinghua, Jiangsu, 225700, China
| | - Aiqian Ye
- Riddet Institute, Massey University, Palmerston North, 4442, New Zealand
| | - Harjinder Singh
- Riddet Institute, Massey University, Palmerston North, 4442, New Zealand
| | - Dérick Rousseau
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, M5B 2K3, Canada
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39
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van der Sman RGM, Houlder S, Cornet S, Janssen A. Physical chemistry of gastric digestion of proteins gels. Curr Res Food Sci 2020; 2:45-60. [PMID: 32914111 PMCID: PMC7473360 DOI: 10.1016/j.crfs.2019.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In this paper, we present the rich physics and chemistry of the gastric digestion of protein gels. Knowledge of this matter is important for the development of sustainable protein foods that are based on novel proteins sources like plant proteins or insects. Their digestibility is an important question in the design of these new protein foods. As polyelectrolyte gels, they can undergo volume changes upon shifts in pH or ionic strengths, as protein gels experience when entering the gastric environment. We show that these volume changes can be modelled using the Flory-Rehner theory, combined with Gibbs-Donnan theory accounting for the distribution of electrolytes over gel and bath. In-vitro experiments of soy protein gels in simulated gastric fluid indeed show intricate swelling behaviour, at first the gels show swelling but at longer times they shrink again. Simulations performed with the Flory-Rehner/Gibbs-Donnan theory reproduce qualitatively similar behaviour. In the final part of the paper, we discuss how the model must be extended to model realistic conditions existing in the in-vivo gastric environment.
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Affiliation(s)
- R G M van der Sman
- Wageningen Food Biobased Research, Wageningen University & Research, the Netherlands
- Food Process Engineering, Wageningen University & Research, the Netherlands
| | - Sian Houlder
- Food Process Engineering, Wageningen University & Research, the Netherlands
| | - Steven Cornet
- Wageningen Food Biobased Research, Wageningen University & Research, the Netherlands
- Food Process Engineering, Wageningen University & Research, the Netherlands
| | - Anja Janssen
- Food Process Engineering, Wageningen University & Research, the Netherlands
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40
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Zhao J, Wu J, Chen Y, Zhao M, Sun W. Gel Properties of Soy Protein Isolate Modified by Lipoxygenase-Catalyzed Linoleic Acid Oxidation and Their Influence on Pepsin Diffusion and In Vitro Gastric Digestion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5691-5698. [PMID: 32348134 DOI: 10.1021/acs.jafc.0c00808] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The model of lipoxygenase-catalyzed linoleic acid (LA) oxidation was selected as representative of a lipid peroxidation system to investigate the effects of oxidative modification on soybean protein isolate (SPI) gel properties and in vitro gastric digestion. Fluorescence recovery after the photobleaching (FRAP) technique was applied to evaluate pepsin diffusion in the gel. The results showed that oxidative modification increased the gel hardness as well as brought about a compact and three-dimensional network structure, which consequently decreased the water mobility as manifest by lowering the relaxation time of T2b and T21 from 0.55 and 3.22 ms for the control to 0.32 and 2.42 ms for 7LA+LOX (addition of 7 mL of LA and LOX), respectively. It was interesting to note that pepsin diffusion was significant correlated (p < 0.05) with T2b and DH (degree of hydrolysis), indicating that water mobility might be a factor related to FITC-pepsin diffusion, which would ultimately influence the gel gastric digestion. Compared with native SPI, moderate oxidation can improve the digestibility of SPI gel by the summed effects of pepsin diffusion limitation, microstructure variation, and hydrolysis degree.
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Affiliation(s)
- Jie Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Jihong Wu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Yanni Chen
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510641, China
| | - Weizheng Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510641, China
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41
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Enzymes to unravel bioproducts architecture. Biotechnol Adv 2020; 41:107546. [PMID: 32275940 DOI: 10.1016/j.biotechadv.2020.107546] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/20/2020] [Accepted: 04/03/2020] [Indexed: 11/20/2022]
Abstract
Enzymes are essential and ubiquitous biocatalysts involved in various metabolic pathways and used in many industrial processes. Here, we reframe enzymes not just as biocatalysts transforming bioproducts but also as sensitive probes for exploring the structure and composition of complex bioproducts, like meat tissue, dairy products and plant materials, in both food and non-food bioprocesses. This review details the global strategy and presents the most recent investigations to prepare and use enzymes as relevant probes, with a focus on glycoside-hydrolases involved in plant deconstruction and proteases and lipases involved in food digestion. First, to expand the enzyme repertoire to fit bioproduct complexity, novel enzymes are mined from biodiversity and can be artificially engineered. Enzymes are further characterized by exploring sequence/structure/dynamics/function relationships together with the environmental factors influencing enzyme interactions with their substrates. Then, the most advanced experimental and theoretical approaches developed for exploring bioproducts at various scales (from nanometer to millimeter) using active and inactive enzymes as probes are illustrated. Overall, combining multimodal and multiscale approaches brings a better understanding of native-form or transformed bioproduct architecture and composition, and paves the way to mainstream the use of enzymes as probes.
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42
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Yan W, Yin L, Li J, Yadav MP, Jia X. Development of Corn Fiber Gum–Soybean Protein Isolate Double Network Hydrogels Through Synergistic Gelation. FOOD BIOPROCESS TECH 2020. [DOI: 10.1007/s11947-020-02412-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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43
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Deng R, Janssen AE, Vergeldt FJ, Van As H, de Graaf C, Mars M, Smeets PA. Exploring in vitro gastric digestion of whey protein by time-domain nuclear magnetic resonance and magnetic resonance imaging. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105348] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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44
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Somaratne G, Ferrua MJ, Ye A, Nau F, Floury J, Dupont D, Singh J. Food material properties as determining factors in nutrient release during human gastric digestion: a review. Crit Rev Food Sci Nutr 2020; 60:3753-3769. [PMID: 31957483 DOI: 10.1080/10408398.2019.1707770] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The fundamental mechanisms of nutrient release from solid foods during gastric digestion consists of multiple elementary processes. These include the diffusion of gastric juice into the food matrix and its simultaneous enzymatic degradation and mechanical breakdown by the peristaltic activity of the stomach. Understanding the relative role of these key processes, in association with the composition and structure of foods, is of paramount importance for the design and manufacture of novel foods possessing specific target behavior within the body. This review covers the past and current literature with respect to the in-stomach processes leading to physical and biochemical disintegration of solid foods and release of nutrients. The review outlines recent progress in experimental and modeling methods used for studying food disintegration mechanisms and concludes with a discussion on potential future research directions in this field. Information from pharmaceutical science-based modeling approaches describing nutrient release kinetics as a result of food disintegration in the gastric environment is also reviewed. Future research aimed at understanding gastric digestion is important not only for setting design principles for novel food design but also for understanding mechanisms underpinning dietary guidelines to consume wholesome foods.
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Affiliation(s)
- Geeshani Somaratne
- Riddet Institute, Massey University, Palmerston North, New Zealand.,School of food and Advanced Technology, Massey University, Palmerston North, New Zealand
| | - Maria J Ferrua
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Fonterra Research and Development Centre, Palmerston North, New Zealand
| | - Aiqian Ye
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | | | | | | | - Jaspreet Singh
- Riddet Institute, Massey University, Palmerston North, New Zealand.,School of food and Advanced Technology, Massey University, Palmerston North, New Zealand
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45
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In-situ disintegration of egg white gels by pepsin and kinetics of nutrient release followed by time-lapse confocal microscopy. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105228] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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46
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Jin H, Liu C, Zhang S, Guo Z, Li J, Zhao Q, Zhang Y, Xu J. Comparison of protein hydrolysates against their native counterparts in terms of structural and antioxidant properties, and when used as emulsifiers for curcumin nanoemulsions. Food Funct 2020; 11:10205-10218. [DOI: 10.1039/d0fo01830a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The stability and in vitro digestion of nanoemulsions stabilized by natural protein hydrolysates (PPI, SPI and WPI) are discussed.
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Affiliation(s)
- Hua Jin
- College of Art and Science
- Northeast Agricultural University
- Harbin 150030
- China
| | - Chang Liu
- College of Art and Science
- Northeast Agricultural University
- Harbin 150030
- China
| | - Shenyi Zhang
- College of Art and Science
- Northeast Agricultural University
- Harbin 150030
- China
| | - Zhuanzhuan Guo
- College of Art and Science
- Northeast Agricultural University
- Harbin 150030
- China
| | - Jishu Li
- College of Art and Science
- Northeast Agricultural University
- Harbin 150030
- China
| | - Qingshan Zhao
- Laboratory Management Office
- Northeast Agricultural University
- Harbin 150030
- China
| | - Yan Zhang
- Coastal Research and Extension Center
- Mississippi State University
- USA
| | - Jing Xu
- College of Art and Science
- Northeast Agricultural University
- Harbin 150030
- China
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47
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Somaratne G, Nau F, Ferrua MJ, Singh J, Ye A, Dupont D, Singh RP, Floury J. Characterization of egg white gel microstructure and its relationship with pepsin diffusivity. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105258] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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48
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Zhao J, Su G, Zhao M, Sun W. Physicochemical Changes and in Vitro Gastric Digestion of Modified Soybean Protein Induced by Lipoxygenase Catalyzed Linoleic Acid Oxidation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:13978-13985. [PMID: 31757126 DOI: 10.1021/acs.jafc.9b05843] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Protein oxidation results in structural modification which affects its digestion. The objective of this work was to investigate the influence of lipoxygenases (LOX) catalyzed linoleic acid (LA) oxidation on the structure and in vitro gastric digests of soybean protein isolate (SPI). Fluorescence recovery after photobleaching (FRAP) was used to evaluate the relationship between pepsin diffusion and gastric digestion. Results indicated that oxidation induced carbonyl formation and loss of free sulfhydryl. Increased surface hydrophobicity and zeta-potential verified the protein unfolding and thus resulted in a small particle size and low fluorescence intensity. Fourier transform infrared spectroscopy (FTIR) showed that oxidation caused the increases in β-sheets mostly at the expense of α-helix and random coils. Fluorescein isothiocyanate (FITC)-pepsin in SPI solution modified with 3 mL LA showed a faster diffusion rate with 80.51 μm2/s as well as a higher DH value of 9.11%, showing that pepsin diffusivity might play an important role in protein gastric digestion.
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Affiliation(s)
- Jie Zhao
- School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China
| | - Guowan Su
- School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center) , Guangzhou 510641 , China
| | - Mouming Zhao
- School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center) , Guangzhou 510641 , China
| | - Weizheng Sun
- School of Food Science and Engineering , South China University of Technology , Guangzhou 510641 , China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center) , Guangzhou 510641 , China
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49
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Wang Y, Eastwood B, Yang Z, de Campo L, Knott R, Prosser C, Carpenter E, Hemar Y. Rheological and structural characterization of acidified skim milks and infant formulae made from cow and goat milk. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.05.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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50
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Ye A, Cui J, Carpenter E, Prosser C, Singh H. Dynamic in vitro gastric digestion of infant formulae made with goat milk and cow milk: Influence of protein composition. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2019.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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