1
|
Chen G, Xu C, Wang Z, Han Z, Xia Q, Wei S, Sun Q, Liu S. Effect of MDA-mediated oxidation on the protein structure and digestive properties of golden pomfret. Food Chem 2024; 443:138563. [PMID: 38290301 DOI: 10.1016/j.foodchem.2024.138563] [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: 09/23/2023] [Revised: 12/12/2023] [Accepted: 01/22/2024] [Indexed: 02/01/2024]
Abstract
In this study, golden pomfret myofibrillar protein (MP) was used as the research object, and the oxidation system of malondialdehyde (MDA) as an inducer and the static digestion model in vitro was established for the analysis of the changes in protein structure and molecular morphology during oxidation and digestion. Subsequently, the effects of MDA-mediated oxidation on the structure and digestive properties of golden pomfret myofibrillar fibrillar protein were determined. The results showed that the hydrolysis degree and digestion rate of MP were inhibited with the increase in MDA concentration (0, 0.5, 1, 2, 5, 10 mmol/L), and the carbonyl group, surface hydrophobicity, irregular curling, and MDA content increased significantly (P < 0.05), whereas the total sulfhydryl groups, α-helices, free amino groups, hydrolysis degree, and MDA incorporation decreased significantly (P < 0.05), The molecular particle size was significantly reduced (P < 0.05), and the molecular morphology and molecular structure were analyzed (P >0.05). Finally, the molecular size and cross-linking degree gradually increased. In conclusion, MDA can alter the structure and morphology of proteins, resulting in a decrease in hydrolysis and digestion rate. This study can provide theoretical support and reference for the regulation of protein digestion.
Collapse
Affiliation(s)
- Guanyi Chen
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
| | - Chencai Xu
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
| | - Zefu Wang
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China.
| | - Zongyuan Han
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
| | - Qiuyu Xia
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
| | - Shuai Wei
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
| | - Qinxiu Sun
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Shucheng Liu
- College of Food Science and Technology, Guangdong Ocean University, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Provincial Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China.
| |
Collapse
|
2
|
Wang X, Wu Q, Mao X, Zhang J. Effect of Alkyl Peroxyl Radical Oxidation on the Oxidative Stability of Walnut Protein Emulsions and Their Adsorbed Proteins. Foods 2024; 13:1513. [PMID: 38790813 PMCID: PMC11120051 DOI: 10.3390/foods13101513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/04/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
Walnuts are high in protein content and rich in nutrients and are susceptible to oxidation during production and processing, leading to a decrease in the stability of walnut protein emulsions. In this paper, the effect of alkyl peroxyl radical oxidation on the stability of walnut protein emulsions is investigated. With the increase of 2,2-azobis (2-methylpropionamidine) dihydrochloride (AAPH) concentration, both its protein and fat were oxidized to different degrees, and the droplets of the emulsion were first dispersed and then aggregated as seen from the laser confocal, and the stability of walnut protein emulsion was best at the AAPH concentration of 0.2 mmol/L. In addition to this, the adsorption rate of adsorbed proteins showed a decreasing and then an increasing trend with the increase in the oxidized concentration. The results showed that moderate oxidation (AAPH concentration: 0-0.2 mmol/L) promoted an increase in protein flexibility and a decrease in the protein interfacial tension, leading to the decrease in emulsion droplet size and the increase of walnut protein emulsion stability, and excessive oxidation (AAPH concentration: 1-25 mmmol/L) weakened protein flexibility and electrostatic repulsion, making the walnut protein emulsion less stable. The results of this study provide theoretical references for the quality control of walnut protein emulsions.
Collapse
Affiliation(s)
| | | | - Xiaoying Mao
- School of Food Science and Technology, Shihezi University, Shihezi 832003, China
| | | |
Collapse
|
3
|
Li Q, Liu K, Cai G, Yang X, Ngo JCK. Developing Lipase Inhibitor as a Novel Approach to Address the Rice Bran Rancidity Issue─A Critical Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:3277-3290. [PMID: 38329044 DOI: 10.1021/acs.jafc.3c07492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Rice bran is a valuable byproduct from the food processing industry, which contains abundant protein, essential unsaturated fatty acids, and numerous bioactive compounds. However, its susceptibility to rancidity greatly restricts its wide utilization. Many strategies have been proposed to delay the rancidity of rice bran, but most of them have their respective limitations. Here, we proposed that developing rice ban lipase peptide inhibitors represents an alternative and promising prescription for impeding the rancidity of rice bran, in contrast to the conventional stabilization approaches for rice bran. For this reason, the rancidity mechanisms of rice bran and the research progress of rice bran lipases were discussed. In addition, the feasibility of utilizing in silico screening and phage display, two state-of-the-art technologies, in the design of the related peptide inhibitors was also highlighted. This knowledge is expected to provide a theoretical basis for opening a new avenue for stabilizing rice bran.
Collapse
Affiliation(s)
- Qingyun Li
- College of Food Science and Engineering and School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China
| | - Kunlun Liu
- College of Food Science and Engineering and School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China
| | - Gongli Cai
- School of Life Sciences and Hong Kong Branch of National Engineering Research Center of Genetic Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR 999077, China
| | - Xi Yang
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan
| | - Jacky Chi Ki Ngo
- School of Life Sciences and Hong Kong Branch of National Engineering Research Center of Genetic Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR 999077, China
| |
Collapse
|
4
|
Qu L, Zhao Y, Li Y, Lv H. Oxidative Stability and Pasting Properties of High-Moisture Japonica Brown Rice following Different Storage Temperatures and Its Cooked Brown Rice Flavor. Foods 2024; 13:471. [PMID: 38338606 PMCID: PMC10855601 DOI: 10.3390/foods13030471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/20/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
The study proposed to investigate the impacts of storage temperatures (15, 20, 25 °C) on the oxidative stability (peroxide value, carbonyl value, malondialdehyde content) and sensory attributes (pasting properties, cooked brown rice flavor) of high-moisture japonica brown rice. According to the findings, the peroxide value, the carbonyl value, and the malondialdehyde content of high-moisture japonica brown rice stored at a temperature of 15 °C exhibited consistently low levels, and the pasting properties were favorable. In addition, 22 out of 51 flavor volatiles were screened as key differential volatile flavor compounds in cooked brown rice via a combination of ANOVA and orthogonal projections to latent structures-discriminant analysis (OPLS-DA). Among them, 3-heptylacrolein had an aroma of fat and mushroom, and its contents were higher at 15 °C and 20 °C. These findings could serve as a valuable reference for storing high-moisture japonica brown rice under low temperature conditions as well as for investigating the flavor characteristics of cooked brown rice derived from this variety.
Collapse
Affiliation(s)
| | - Yan Zhao
- School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450000, China; (L.Q.); (Y.L.); (H.L.)
| | | | | |
Collapse
|
5
|
Hu H, Feng Y, Zheng K, Shi K, Yang Y, Yang C, Wang J. The effect of subzero temperatures on the properties and structure of soy protein isolate emulsions. Food Chem 2024; 433:136829. [PMID: 37742511 DOI: 10.1016/j.foodchem.2023.136829] [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: 01/11/2022] [Revised: 07/01/2023] [Accepted: 07/05/2023] [Indexed: 09/26/2023]
Abstract
Different freezing temperatures (-5, -20, -40 and -80 ℃) could change soy protein isolate (SPI) structure and emulsion properties. After freezing at -5 ℃ and -20 ℃, the structure of the SPI loosened, the fluorescence intensity was red shifted, and the proportion of Phe, Tyr and Trp exposed increased. With decreasing temperature, the surface hydrophobicity (H0 × 100), the number of sulfhydryl groups and the number of disulfide bonds all rose, then fell (-40 ℃), and rose again (-80 ℃). The β-sheet content in the protein secondary structure increased from 32.71% (control) to 50.66% (-40 ℃) and then decreased to 37.05% (-80 ℃), while the β-turn and random coil contents showed the opposite pattern, which also confirmed aggregation. The emulsification performance of SPI after freezing treatment was decreased. The results of this study provide theoretical support for future production of frozen foods with added SPI.
Collapse
Affiliation(s)
- Haiyue Hu
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Yongli Feng
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Kaiwen Zheng
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Kexin Shi
- Tangshan Food and Drug Comprehensive Inspection and Test Center, China
| | - Yutong Yang
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Chen Yang
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China.
| | - Jianming Wang
- College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China.
| |
Collapse
|
6
|
Mao Y, Zhao C, Qi Q, Wang F, Xu X, Zheng M, Zhang H, Wu Y, Liu J. Transglutaminase-induced soybean protein isolate cold-set gels treated with combination of ultrasound and high pressure: Physicochemical properties and structural characterization. Int J Biol Macromol 2023; 253:127525. [PMID: 37863133 DOI: 10.1016/j.ijbiomac.2023.127525] [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: 08/31/2023] [Revised: 10/02/2023] [Accepted: 10/16/2023] [Indexed: 10/22/2023]
Abstract
Soybean protein isolate (SPI) was treated by the combined exposure to ultrasound and high pressure and then subjected to transglutaminase (TGase)-catalyzed cross-linking to prepare SPI cold-set gels. The effects of combined treatments on physicochemical and structural properties of TGase-induced SPI cold-set gels were investigated. The combination of ultrasound and high pressure promoted the covalent disulfide bonds and ε-(γ-glutaminyl) lysine isopeptide bonds as well as non-covalent hydrophobic interactions, which further improved the gelation properties of SPI compared to ultrasound or high pressure alone. In particular, the 480 W ultrasound followed by high pressure treatment of gels led to higher strength (120.53 g), water holding capacity (95.39 %), immobilized water (93.92 %), lightness (42.18), whiteness (51.03), and elasticity (G' = 407 Pa), as well as more uniform and compact microstructure, thus resulting in the improved gel network structure. The combination of two treatments produced more flexible secondary structure, tighter tertiary conformation and higher denaturation degree of protein in the gels, leading to more stable gel structure. The structural modifications of SPI contributed to the improvement of its gelation properties. Therefore, the combined application of ultrasound and high pressure can be an effective method for improving the structure and properties of TGase-induced SPI cold-set gels.
Collapse
Affiliation(s)
- Yuxuan Mao
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Chengbin Zhao
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China.
| | - Qi Qi
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Fang Wang
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Xiuying Xu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Mingzhu Zheng
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Hao Zhang
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Yuzhu Wu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| | - Jingsheng Liu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, China; National Engineering Research Center for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China
| |
Collapse
|
7
|
Yang Y, Bao H, Wang Y, Jiao A, Jin Z. Mechanisms of rice protein hydrolysate regulating the in vitro digestibility of rice starch under extrusion treatment in terms of structure, physicochemical properties and interactions. Int J Biol Macromol 2023; 253:127315. [PMID: 37820920 DOI: 10.1016/j.ijbiomac.2023.127315] [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: 07/24/2023] [Revised: 09/23/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
The effect of protein hydrolysates on starch digestibility has been observed in other heat treatments but has yet to be extensively researched under extrusion. This study aimed to analyze the physicochemical properties, structure, and starch digestibility of extruded rice starch-protein hydrolysate (ERS-RPH) complexes prepared by extrusion treatment. The resistant starch contents of ERS-RPH (12.30 %-19.36 %) were higher than those of extruded starch alone (6.33 %). The interaction forces, physical barrier effects, and enzyme inhibition indicated that RPHs at varying hydrolysis degrees hindered starch digestibility by reducing its contact with enzyme and via adhesion and hydrogen bonding with starch. RPHs with higher hydrolysis exhibited greater inhibition of starch digestibility, limiting the swelling power of starch and the leaching of amylose, thereby improving the thermal stability of starch. Fourier transform infrared spectroscopy results revealed the presence of hydrogen bonding interactions between RPHs and starch in complexes, intensifying the ordered structure of starch. Extrusion caused an increase of 6.8 %-10.8 % in the relative crystallinity of ERS-RPH compared to extruded starch alone. Moreover, the strength of V-type structure was reinforced after extrusion. These results enhanced comprehension of how PRHs regulate starch digestibility under extrusion, and offer direction for producing slow-digesting foods.
Collapse
Affiliation(s)
- Yueyue Yang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Huiyi Bao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yihui Wang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Aiquan Jiao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China.
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
8
|
Han T, Wang Z, Li C, Wang T, Xiao T, Sun Y, Wang S, Wang M, Gai S, Hou B, Liu D. Raw to charred: Changes of protein oxidation and in vitro digestion characteristics of grilled lamb. Meat Sci 2023; 204:109239. [PMID: 37301100 DOI: 10.1016/j.meatsci.2023.109239] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 04/23/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
This study aimed to evaluate protein oxidation and in vitro digestion characteristics of lamb that was grilled from raw to charred (0-30 min). Results showed that protein oxidation was aggravated with the time of grilling, indicated by a significant linear increase in carbonyl groups and a linear decrease in sulfhydryl groups. Proteins had the highest simulated gastric and gastrointestinal digestibility at 10-15 min of grilling. Newly formed specific peptides were continuously released during the grilling process. The identified peptides were mainly derived from creatine kinase, phosphoglycerate kinase, actin and myosin light chain. Protein oxidation was closely related to digestive characteristics, and grilling for >15 min would aggravate protein oxidation and reduce its digestibility. Therefore, at 220 °C lamb should not be grilled for longer than 15 min.
Collapse
Affiliation(s)
- Tianlong Han
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Zixuan Wang
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Chunxiao Li
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Tongtong Wang
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Tong Xiao
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Yuxuan Sun
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Shiyu Wang
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Min Wang
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China.
| | - Shengmei Gai
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China
| | - Bo Hou
- Meat Processing Key Laboratory of Sichuan Province, Chengdu University. Chengdu, 610106, China
| | - Dengyong Liu
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products. Food Safety Key Lab of Liaoning Province. College of Food Science and Technology, Bohai University. Jinzhou, 121013, China.
| |
Collapse
|
9
|
Geng L, Liu K, Zhang H. Lipid oxidation in foods and its implications on proteins. Front Nutr 2023; 10:1192199. [PMID: 37396138 PMCID: PMC10307983 DOI: 10.3389/fnut.2023.1192199] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/25/2023] [Indexed: 07/04/2023] Open
Abstract
Lipids in foods are sensitive to various environmental conditions. Under light or high temperatures, free radicals could be formed due to lipid oxidation, leading to the formation of unstable food system. Proteins are sensitive to free radicals, which could cause protein oxidation and aggregation. Protein aggregation significantly affects protein physicochemical characteristics and biological functions, such as digestibility, foaming characteristics, and bioavailability, further reducing the edible and storage quality of food. This review provided an overview of lipid oxidation in foods; its implications on protein oxidation; and the assessment methods of lipid oxidation, protein oxidation, and protein aggregation. Protein functions before and after aggregation in foods were compared, and a discussion for future research on lipid or protein oxidation in foods was presented.
Collapse
Affiliation(s)
- Lianxin Geng
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, China
| | - Kunlun Liu
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou, China
- School of Food and Reserves Storage, Henan University of Technology, Zhengzhou, China
| | - Huiyan Zhang
- Zhengzhou Ruipu Biological Engineering Co., Ltd, Zhengzhou, China
| |
Collapse
|
10
|
Cheng J, Tang D, Yang H, Wang X, Lin Y, Liu X. The effects of mulberry polyphenols on the digestibility and absorption properties of pork myofibrillar protein in vitro. Meat Sci 2023; 202:109205. [PMID: 37172549 DOI: 10.1016/j.meatsci.2023.109205] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 04/19/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
The objective of the present study was to explore the effect of mulberry polyphenols on the digestibility and absorption properties of myofibrillar protein (MP) in vitro. MP was extracted from the Longissimus et thoracis muscle of 18 different pig carcasses and the MP-mulberry polyphenols complex was prepared. The antioxidant activity of digestive juice, degradation of both MP and polyphenols, and the metabolism of MP and the MP-polyphenols complex by intestinal microbial activity during digestion and fermentation in vitro were compared. The results showed that mulberry polyphenols significantly affect the digestibility of MP and the antioxidant activity of digestive juices during digestion (P < 0.05). After the modification of the polyphenols, the hydrolysis of MP increased from 55.4% to 64.0%, and the molecular weight of protein digestion product significantly decreased (P < 0.05). The scavenging rates of 2, 2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl in the final digestive juice were 350.1 μmol Trolox/mg protein and 34.0%, respectively, which were 0.34 and 0.47-fold higher than those of the control (P < 0.05). Furthermore, the release and degradation of phenolic compounds mainly occurred during intestinal digestion, and polyphenols that reached the colon after digestion, through the fermentation of intestinal microorganisms in vitro, enriched Lactobacillus and promoted the production of short-chain fatty acids which has obvious potential to improve intestinal health.
Collapse
Affiliation(s)
- Jingrong Cheng
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, PR China
| | - Daobang Tang
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, PR China
| | - Huaigu Yang
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, PR China
| | - Xuping Wang
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, PR China
| | - Yaosheng Lin
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, PR China
| | - Xueming Liu
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, PR China.
| |
Collapse
|
11
|
Milling of wheat bran: Influence on digestibility, hydrolysis and nutritional properties of bran protein during in vitro digestion. Food Chem 2023; 404:134559. [DOI: 10.1016/j.foodchem.2022.134559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 11/22/2022]
|
12
|
Feng F, Yin Y, Zhou L, Ma C, Zhang W. Effect of Nitric Oxide and Its Induced Protein S-Nitrosylation on the Structures and In Vitro Digestion Properties of Beef Myofibrillar Protein. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2532-2540. [PMID: 36700649 DOI: 10.1021/acs.jafc.2c07804] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
This study aimed to investigate the effects of nitric oxide (NO) and its induced protein S-nitrosylation on the structures and digestion properties of beef myofibrillar protein (MP). The MP was treated with 0, 50, 250, 500, and 1000 μM concentrations of NO-donor S-nitrosoglutathione (GSNO) for 30 min at 37 °C. The results indicated that GSNO treatment significantly decreased the sulfhydryl contents whereas the carbonyl contents increased. Meanwhile, compared with the control group, the surface hydrophobicity, the intrinsic fluorescence intensity, and the α-helix content of proteins were decreased significantly with the enhancement of GSNO concentrations. In addition, 250 μM GSNO treatment increased the gastric digestibility of MP, while the gastrointestinal digestibility and the release of peptides were both inhibited by 500 and 1000 μM GSNO treatments. These data demonstrate that protein S-nitrosylation can affect the in vitro digestion properties of proteins by altering the physicochemical properties and structure of MP.
Collapse
Affiliation(s)
- Fan Feng
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, China
| | - Yantao Yin
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, China
| | - Lei Zhou
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, China
| | - Chao Ma
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, China
| | - Wangang Zhang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, China
| |
Collapse
|
13
|
Li F, Wu X, Liang Y, Wu W. Potential implications of oxidative modification on dietary protein nutritional value: A review. Compr Rev Food Sci Food Saf 2023; 22:714-751. [PMID: 36527316 DOI: 10.1111/1541-4337.13090] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 11/06/2022] [Accepted: 11/21/2022] [Indexed: 12/23/2022]
Abstract
During food processing and storage, proteins are sensitive to oxidative modification, changing the structural characteristics and functional properties. Recently, the impact of dietary protein oxidation on body health has drawn increasing attention. However, few reviews summarized and highlighted the impact of oxidative modification on the nutritional value of dietary proteins and related mechanisms. Therefore, this review seeks to give an updated discussion of the effects of oxidative modification on the structural characteristics and nutritional value of dietary proteins, and elucidate the interaction with gut microbiota, intestinal tissues, and organs. Additionally, the specific mechanisms related to pathological conditions are also characterized. Dietary protein oxidation during food processing and storage change protein structure, which further influences the in vitro digestion properties of proteins. In vivo research demonstrates that oxidized dietary proteins threaten body health via complicated pathways and affect the intestinal microenvironment via gut microbiota, metabolites, and intestinal morphology. This review highlights the influence of oxidative modification on the nutritional value of dietary proteins based on organs and the intestinal tract, and illustrates the necessity of appropriate experimental design for comprehensively exploring the health consequences of oxidized dietary proteins.
Collapse
Affiliation(s)
- Fang Li
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, P. R. China.,National Engineering Research Center of Rice and Byproduct Deep Processing, Changsha, Hunan, P. R. China
| | - Xiaojuan Wu
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, P. R. China.,National Engineering Research Center of Rice and Byproduct Deep Processing, Changsha, Hunan, P. R. China
| | - Ying Liang
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, P. R. China.,National Engineering Research Center of Rice and Byproduct Deep Processing, Changsha, Hunan, P. R. China
| | - Wei Wu
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, P. R. China.,National Engineering Research Center of Rice and Byproduct Deep Processing, Changsha, Hunan, P. R. China
| |
Collapse
|
14
|
Effect of Oxidative Modification by Peroxyl Radical on the Characterization and Identification of Oxidative Aggregates and In Vitro Digestion Products of Walnut ( Juglans regia L.) Protein Isolates. Foods 2022; 11:foods11244104. [PMID: 36553844 PMCID: PMC9777859 DOI: 10.3390/foods11244104] [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: 11/17/2022] [Revised: 12/11/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022] Open
Abstract
Walnut protein is a key plant protein resource due to its high nutritional value, but walnuts are prone to oxidation during storage and processing. This article explored the oxidative modification and digestion mechanism of walnut protein isolates by peroxyl radical and obtained new findings. SDS-PAGE and spectral analysis were used to identify structural changes in the protein after oxidative modification, and LC-MS/MS was used to identify the digestion products. The findings demonstrated that as the AAPH concentration increased, protein carbonyl content increased from 2.36 to 5.12 nmol/mg, while free sulfhydryl content, free amino content, and surface hydrophobicity decreased from 4.30 nmol/mg, 1.47 μmol/mg, and 167.92 to 1.72 nmol/mg, 1.13 μmol/mg, and 40.93 nmol/mg, respectively. Furthermore, the result of Tricine-SDS-PAGE in vitro digestion revealed that protein oxidation could cause gastric digestion resistance and a tendency for intestinal digestion promotion. Carbonyl content increased dramatically during the early stages of gastric digestion and again after 90 min of intestine digestion, and LC-MS/MS identified the last digestive products of the stomach and intestine as essential seed storage proteins. Oxidation causes walnut proteins to form aggregates, which are then re-oxidized during digestion, and proper oxidative modification may benefit intestinal digestion.
Collapse
|
15
|
Effect of Malondialdehyde on the Digestibility of Beef Myofibrillar Protein: Potential Mechanisms from Structure to Modification Site. Foods 2022; 11:foods11152176. [PMID: 35892761 PMCID: PMC9330876 DOI: 10.3390/foods11152176] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 11/17/2022] Open
Abstract
Lipid oxidation and protein oxidation occur side by side in meat. Here, the effect of malondialdehyde (MDA), the major product of lipid oxidation, on the digestibility of beef myofibrillar proteins (MP) was studied. MP samples were incubated with 0, 0.1, 0.3, 0.5, and 0.7 mM MDA at 4 °C for 12 h and then subjected to in vitro gastrointestinal digestion. The result showed that MDA remarkably reduced the digestibility of MP (p < 0.05). MDA treatments significantly increased carbonyl and Schiff base contents in MP (p < 0.05). The microstructure observed by atomic force microscopy showed that MDA treatments resulted in the aggregation of MP. Non-reducing and reducing electrophoresis suggested the aggregation was mainly caused by covalent bonds including disulfide bond and carbonyl−amine bond. Proteomics analysis proved that the myosin tail was the main target of MDA attack, meanwhile, lysine residues were the major modification sites. Taken together, the above results imply that MDA induces protein oxidation, aggregation, and blockage of hydrolysis sites, consequently leading to the decrease in both gastric and gastrointestinal digestibility of MP.
Collapse
|
16
|
Li F, Wu X, Wu W. Effects of oxidized rice bran protein induced by rancidity on the hepatic function in mice. Food Funct 2022; 13:6089-6102. [PMID: 35575529 DOI: 10.1039/d2fo00976e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rice bran protein (RBP) is a great resource of premium protein. However, rice bran (RB) rancidity, which inevitably occurs during rice milling, can induce RBP oxidation, further affecting the nutritional value of RBP. This study focused on the impact of RBP rancidity on the nutritional value of oxidized RBP. RBP with varying oxidation degrees and doses was given to mice via a 12-week intragastric administration. Oxidized RBP interfered with hepatic function and inflammation, and decreased the antioxidant capacities of the liver. Oxidized RBP also disturbed the hepatic lipid metabolism, and excessively oxidized RBP caused intrahepatic lipid accumulation and hepatic damage. Furthermore, oxidized RBP triggered the MyD88/NF-κB pathway but inhibited the Keap1-Nrf2/ARE pathway in the liver. Correlation analysis revealed that the protein expression of the Nrf2 pathway was negatively correlated with the NF-κB pathway. Results implied that oxidized RBP induced hepatic damage and hepatic dysfunction, indicating the deteriorating nutrition of oxidized RBP. The results exhibited the nutritional value of RBP after oxidative modification, and implied the importance of optimizing food-processing strategies to reduce the degree of protein oxidation, thereby avoiding the nutritional loss of dietary protein.
Collapse
Affiliation(s)
- Fang Li
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| | - Xiaojuan Wu
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| | - Wei Wu
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| |
Collapse
|
17
|
Li F, Kang Z, Wu X, Wu W. Rice bran protein oxidation induced by rancidity alters the gut microbiota and intestinal permeability in mice. Food Funct 2022; 13:5430-5441. [PMID: 35475442 DOI: 10.1039/d1fo03308e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dietary protein is crucial for maintaining body growth and plays a significant role in shaping the gut microbiota. Rice bran (RB) rancidity can induce rice bran protein (RBP) oxidation and change the structural characteristics, which further impacts the functional properties and nutritional value of RBP. Therefore, the impact of rancidity-induced RBP oxidation on the gut microbiota and intestinal permeability was evaluated. Oxidized RBP significantly altered the α-diversity of the gut microbiota and impacted the microbial profile at phylum and genus levels, and moderately oxidized RBP caused increasing abundance of Akkermansia and reducing abundance of Desulfovibrio. Different oxidation extents of RBP induced different biomarkers, indicating that the composition of the gut microbiota presented an oxidation extent-dependent pattern. Oxidized RBP also significantly promoted the level of formic acid and reduced the level of isovaleric acid. Moreover, oxidized RBP significantly upregulated the expression of genes related to tight junction proteins. The phenomena indicated that oxidized RBP significantly changed the composition of the gut microbiota and improved the barrier function of the intestine, while showing fewer effects on the production of short-chain fatty acids (SCFAs). The research provides a theoretical reference for understanding the effects of plant protein oxidation on intestinal health during food storage and processing.
Collapse
Affiliation(s)
- Fang Li
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| | - Zhuoran Kang
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| | - Xiaojuan Wu
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| | - Wei Wu
- College of Food Science and Engineering, Central South University of Forestry and Technology, 498 Southern Shaoshan Road, Changsha, Hunan 410004, P. R. China. .,National Engineering Research Center of Rice and Byproduct Deep Processing, 498 South Shaoshan Road, Changsha, Hunan 410004, P. R. China
| |
Collapse
|
18
|
Xin L, Zhang Y, Duan W, Ai M, Song H, Huang Q, Lu J. Effect of malondialdehyde oxidation on structure and physicochemical properties of amandin. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Luo Xin
- Production and Construction Group Key Laboratory of Special Agricultural Products Further Processing in Southern Xinjiang Xinjiang 843300 China
- College of Food Science Fujian Agriculture and Forestry University Fuzhou Fujian 350002 China
- School of Public Health The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education Guizhou Medical University Guiyang 550000 China
| | - Yufeng Zhang
- College of Food Science Fujian Agriculture and Forestry University Fuzhou Fujian 350002 China
| | - Wenshan Duan
- College of Food Science Fujian Agriculture and Forestry University Fuzhou Fujian 350002 China
| | - Mingyan Ai
- Production and Construction Group Key Laboratory of Special Agricultural Products Further Processing in Southern Xinjiang Xinjiang 843300 China
| | - Hongbo Song
- College of Food Science Fujian Agriculture and Forestry University Fuzhou Fujian 350002 China
| | - Qun Huang
- College of Food Science Fujian Agriculture and Forestry University Fuzhou Fujian 350002 China
- School of Public Health The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education Guizhou Medical University Guiyang 550000 China
| | - Jiankang Lu
- Production and Construction Group Key Laboratory of Special Agricultural Products Further Processing in Southern Xinjiang Xinjiang 843300 China
| |
Collapse
|
19
|
Li F, Wu X, Wu W. Rancidity-induced rice bran protein oxidation causes kidney injury in mice via oxidative stress and inflammatory response. J Cereal Sci 2022. [DOI: 10.1016/j.jcs.2022.103424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
20
|
Wu X, Li F, Wu W. Effect of rice bran rancidity on the structure and antioxidant properties of rice bran soluble dietary fiber. J Cereal Sci 2022. [DOI: 10.1016/j.jcs.2022.103469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
21
|
Effect of oxidative modification by reactive oxygen species (ROS) on the aggregation of whey protein concentrate (WPC). Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
22
|
Effect of Peroxyl Radical-Induced Oxidation on Functional and Structural Characteristics of Walnut Protein Isolates Revealed by High-Resolution Mass Spectrometry. Foods 2022; 11:foods11030385. [PMID: 35159534 PMCID: PMC8834345 DOI: 10.3390/foods11030385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/19/2022] [Accepted: 01/24/2022] [Indexed: 12/03/2022] Open
Abstract
The present study aims to investigate the structural and functional properties of oxidated walnut protein isolates (WPI) by 2,2′-azobis (2-amidinopropane) dihydrochloride (AAPH). The oxidation degree, changes in structural characteristics, processing properties, and protein modifications of WPI were measured. The results showed that oxidation significantly induced structural changes, mainly reflected by the increasing carbonyl content, and decreasing sulfhydryl and free amino groups. Moreover, the secondary structure of WPI was altered in response to oxidation, and large aggregates formed through disulfide cross-linking and hydrophobic interactions. Almost all the property indicators were significantly decreased by oxidation except the foaming property and water/oil holding capacity. Mass spectrometry analysis showed that 16 different modifications occurred in amino acid side chains, and most of the protein groups with higher numbers of modifications were found to be associated with allergies, which was further confirmed by the reduction in antigenicity of the major allergen (Jug r 1) in WPI. Meanwhile, we used oxidation-related proteins for gene ontology (GO) enrichment analyses, and the results indicated that 115, 204 and 59 GO terms were enriched in terms of biological process, molecular function, and cellular component, respectively. In conclusion, oxidation altered the groups and conformation of WPI, which in turn caused modification in the functional properties correspondingly. These findings might provide a reference for processing and storage of walnut protein foods.
Collapse
|
23
|
Substitution of rice flour with rice protein improved quality of gluten-free rice spaghetti processed using single screw extrusion. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112512] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
24
|
Abstract
Protein oxidation is a topic of indisputable scientific interest given the impact of oxidized proteins on food quality and safety. Carbonylation is regarded as one of the most notable post-translational modifications in proteins and yet, this reaction and its consequences are poorly understood. From a mechanistic perspective, primary protein carbonyls (i.e. α-aminoadipic and γ-glutamic semialdehydes) have been linked to radical-mediated oxidative stress, but recent studies emphasize the role alternative carbonylation pathways linked to the Maillard reaction. Secondary protein carbonyls are introduced in proteins via covalent linkage of lipid carbonyls (i.e. protein-bound malondialdehyde). The high reactivity of protein carbonyls in foods and other biological systems indicates the intricate chemistry of these species and urges further research to provide insight into these molecular mechanisms and pathways. In particular, protein carbonyls are involved in the formation of aberrant and dysfunctional protein aggregates, undergo further oxidation to yield carboxylic acids of biological relevance and establish interactions with other biomolecules such as oxidizing lipids and phytochemicals. From a methodological perspective, the routine dinitrophenylhydrazine (DNPH) method is criticized not only for the lack of accuracy and consistency but also authors typically perform a poor interpretation of DNPH results, which leads to misleading conclusions. From a practical perspective, the biological relevance of protein carbonyls in the field of food science and nutrition is still a topic of debate. Though the implication of carbonylation on impaired protein functionality and poor protein digestibility is generally recognized, the underlying mechanism of such connections requires further clarification. From a medical perspective, protein carbonyls are highlighted as markers of protein oxidation, oxidative stress and disease. Yet, the specific role of specific protein carbonyls in the onset of particular biological impairments needs further investigations. Recent studies indicates that regardless of the origin (in vivo or dietary) protein carbonyls may act as signalling molecules which activate not only the endogenous antioxidant defences but also implicate the immune system. The present paper concisely reviews the most recent advances in this topic to identify, when applicable, potential fields of interest for future studies.
Collapse
|
25
|
Cao H, Sun R, Shi J, Li M, Guan X, Liu J, Huang K, Zhang Y. Effect of ultrasonic on the structure and quality characteristics of quinoa protein oxidation aggregates. ULTRASONICS SONOCHEMISTRY 2021; 77:105685. [PMID: 34364069 PMCID: PMC8350374 DOI: 10.1016/j.ultsonch.2021.105685] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/13/2021] [Accepted: 07/21/2021] [Indexed: 05/06/2023]
Abstract
Protein oxidation leads to covalent modification of structure and deterioration of functional properties of quinoa protein. The objective of this study was to investigate the effects of ultrasonic treatment on the functional and physicochemical properties of quinoa protein oxidation aggregates. In this concern, 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH) was selected as oxidative modification of quinoa protein. The microstructure of quinoa protein displayed by scanning electron microscope (SEM) indicated that oxidation induced extensive aggregation, leading to carbonylation and degradation of sulfhydryl groups. Aggregation induced by oxidation had a negative effect on the solubility, turbidity, emulsifying stability. However, according to the analysis of physicochemical properties, ultrasonic significantly improved the water solubility of quinoa protein. The quinoa protein treated by ultrasonic for 30 min exhibited the best dispersion stability in water, which corresponded to the highest ζ-potential, smallest particle size and most uniform distribution. Based on the FT-IR, SDS-PAGE and surface hydrophobicity analysis, the increase of α-helix, β-turn and surface hydrophobicity caused by cavitation effect appeared to be the main mechanism of quinoa protein solubilization. In addition, the hydrophobic region of the protein was re-buried by excessive ultrasonic treatment, and the protein molecules were reaggregated by disulfide bonds. Microstructural observations further confirmed that ultrasonic treatment effectively inhibited protein aggregation and improved the functional properties of quinoa protein.
Collapse
Affiliation(s)
- Hongwei Cao
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China; Innovation Center of National Grain, University of Shanghai for Science and Technology, Shanghai, PR China
| | - Rulian Sun
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China
| | - Junru Shi
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China
| | - Mengyao Li
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China
| | - Xiao Guan
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China; Innovation Center of National Grain, University of Shanghai for Science and Technology, Shanghai, PR China.
| | - Jing Liu
- College of Information Engineering, Shanghai Maritime University, Shanghai, PR China
| | - Kai Huang
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China
| | - Yu Zhang
- School of Medical Instruments and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China
| |
Collapse
|
26
|
Chen J, Zhao J, Kong B, Chen Q, Liu Q, Liu C. Comparative Study of Oxidative Structural Modifications of Unadsorbed and Adsorbed Proteins in Whey Protein Isolate-Stabilized Oil-in-Water Emulsions under the Stress of Primary and Secondary Lipid Oxidation Products. Foods 2021; 10:593. [PMID: 33799885 PMCID: PMC7999650 DOI: 10.3390/foods10030593] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/07/2021] [Accepted: 03/09/2021] [Indexed: 01/07/2023] Open
Abstract
The impact of typical primary or secondary lipid oxidation (LPO) products, selected as linoleic acid 13-hydroperoxide (13-HPODE) and malondialdehyde (MDA), on the structural modification of unadsorbed or adsorbed proteins in whey protein isolate (WPI)-stabilized oil-in-water (O/W) emulsions during storage up to 48 h at 37 °C in the dark was investigated. The results showed that either 13-HPODE and MDA could lead to structural modifications of unadsorbed or adsorbed proteins with a concentration-dependent manner and time relationship, respectively. Moreover, higher levels of MDA rendered a higher degree of oxidative modifications of WPI than 13-HPODE, indicated by the higher protein carbonyl contents and N'-formyl-L-kynurenine (NFK) and lower fluorescence intensity. Additionally, adsorbed proteins were more easily oxidized by LPO products than unadsorbed proteins. Overall, our results indicated that the formation of secondary LPO products and the protein position were crucial factors to increase the degree of oxidative modifications of WPI in O/W emulsion systems.
Collapse
Affiliation(s)
- Jiaxin Chen
- College of Food Science, Northeast Agricultural University, Harbin 150030, China; (J.C.); (B.K.); (Q.C.)
| | - Jinhai Zhao
- Institute for Advanced Technology, Heilongjiang Academy of Sciences, Harbin 150001, China;
| | - Baohua Kong
- College of Food Science, Northeast Agricultural University, Harbin 150030, China; (J.C.); (B.K.); (Q.C.)
| | - Qian Chen
- College of Food Science, Northeast Agricultural University, Harbin 150030, China; (J.C.); (B.K.); (Q.C.)
| | - Qian Liu
- College of Food Science, Northeast Agricultural University, Harbin 150030, China; (J.C.); (B.K.); (Q.C.)
- National Dairy Engineering & Technology Research Center, Heilongjiang Green Food Science & Research Institute, Harbin 150028, China
| | - Chengguo Liu
- Sharable Platform of Large-Scale Instruments & Equipments, Northeast Agricultural University, Harbin 150030, China
| |
Collapse
|