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Guo X, Wang R, Han B, Shao W, Chen L, Feng X. A novel EGCG-Histidine complex improves gelling and physicochemical properties of porcine myofibrillar proteins: Insight into underlying mechanisms. Food Chem 2024; 448:139070. [PMID: 38555690 DOI: 10.1016/j.foodchem.2024.139070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/28/2024] [Accepted: 03/16/2024] [Indexed: 04/02/2024]
Abstract
Herein, an EGCG-Histidine complex is prepared, characterized, and further used to improve gel properties of myofibrillar proteins (MP). Results of FTIR, XRD, UV-Vis spectroscopy showed that histidine is covalently bound to EGCG by Michael addition or Schiff base reaction to form EGCG-Histidine complex, and antioxidant activity of EGCG-Histidine complex is significantly increased compared to EGCG or histidine alone (P < 0.05). The addition of EGCG-Histidine complex results in cooking loss of gel decreasing from 66.7 ± 0.23 % to 40.3 ± 2.02 %, and improves rheological properties of MP, and enhances gel strength from 0.10 ± 0.01 N to 0.22 ± 0.03 N, indicating positive effect of EGCG-Histidine complex on MP gel formation, above results is supported by results of SEM, CD spectroscopy, SDS-PAGE, and tryptophan fluorescence. These results indicated that EGCG-Histidine complex can be used as a functional ingredient to improve gel quality of meat products.
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Affiliation(s)
- Xiao Guo
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Renzheng Wang
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Bofu Han
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Wei Shao
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Lin Chen
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Xianchao Feng
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China.
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2
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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] [What about the content of this article? (0)] [Affiliation(s)] [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.
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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.
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3
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Zhou X, Wang J, Zhao J, Yuan C, Zhang X, Huang T, Yang W, Wei H. Effect of ultrasound combined with pineapple protease treatment on the tenderness of dried shrimp. J Sci Food Agric 2024; 104:3947-3957. [PMID: 38264924 DOI: 10.1002/jsfa.13277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/18/2023] [Accepted: 01/05/2024] [Indexed: 01/25/2024]
Abstract
BACKGROUND In order to improve the tenderness of dried shrimp products as well as to reduce the hardness of the meat during the drying process, shrimp were treated with ultrasound combined with pineapple protease and the tenderization condition was optimized by measuring the texture and shear force of dried shrimp. In addition, the sulfhydryl content, myofibril fragmentation index (MFI) and microstructure were also examined to clarify the mechanisms of shrimp tenderization. RESULTS The results showed UB1 group with ultrasonic power of 100 W, heating temperature of 50 °C and pineapple protease concentration of 20 U mL-1 were the optimum tenderization conditions, where shrimp showed the lowest hardness (490.76 g) and shear force (2006.35 gf). Microstructure as well as sodium dodecyl sulfate-polyacrylamide gel electrophoresis results suggested that during the tenderization process the muscle segments of shrimps were broken, degradation of myofibrillar proteins occurred, and MFI values and total sulfhydryl content increased significantly (P < 0.05) (MFI value = 193.6 and total sulfhydryl content = 93.93 mmol mg-1 protein for UB 1 group). CONCLUSION Ultrasound combined with bromelain could be used as a simple and effective tenderization method for the production of tender dried shrimp. The best conditions were 100 W ultrasonic power, 50 °C ultrasonic temperature, and 20 U mL-1 bromelain. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Xinyi Zhou
- College of Food Science and engineering, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Jian Wang
- College of Food Science and engineering, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Jingxu Zhao
- College of Food Science and engineering, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Chunhong Yuan
- Faculty of Agriculture, Iwate University, Iwate, Japan
| | - Xiaojun Zhang
- Laboratory of Aquatic Product Processing and Quality Safety, Zhejiang Marine Fisheries Research Institute, Zhoushan, China
| | - Tao Huang
- College of Food Science and engineering, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Wenge Yang
- College of Food Science and engineering, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Huamao Wei
- College of Food Science and engineering, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
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Ding N, Sun X, Yu Q, Hong H, Luo Y, Tan Y. Unlocking the secrets of crude myofibril-bound serine protease from grass carp: The role in degrading myofibrillar proteins. Food Chem 2024; 437:137844. [PMID: 37918161 DOI: 10.1016/j.foodchem.2023.137844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 10/06/2023] [Accepted: 10/23/2023] [Indexed: 11/04/2023]
Abstract
Grass carp (Ctenopharyngodon idella) are used as raw material for conventional surimi products in Southern China. However, endogenous serine proteases deteriorated the texture of the surimi gel. To unlock the mechanism behind, the present study isolated the crude myofibril-bound serine protease (cMBSP) in grass carp and studied its effects on surimi gel. The cMBSP activity was the highest at 40 °C and pH 8.0, and it remained stable at 20-55 °C neutral pH. Additionally, it was susceptible to serine protease inhibitors and high concentrations of Na+. The maximum degradation of myosin heavy chain by cMBSP was observed at 50 °C. Protein unc-45 homolog B (a myosin chaperone) is one of the apparent degradation products according to mass spectrometry. The cMBSP caused lower water holding capacity and deteriorated texture in the surimi gel. This study expanded insights about the mechanism of surimi gel degradation by cMBSP, which provided theoretical basis for enhancing surimi quality.
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Affiliation(s)
- Ning Ding
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiaoyue Sun
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Qinye Yu
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Hui Hong
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yongkang Luo
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yuqing Tan
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
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5
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Yu Q, Hong H, Liu Y, Monto AR, Gao R, Bao Y. Oxidation affects pH buffering capacity of myofibrillar proteins via modification of histidine residue and structure of myofibrillar proteins. Int J Biol Macromol 2024; 260:129532. [PMID: 38246447 DOI: 10.1016/j.ijbiomac.2024.129532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/05/2024] [Accepted: 01/14/2024] [Indexed: 01/23/2024]
Abstract
The pH buffering capacity is an important functionality of muscle proteins, and muscle foods are susceptible to being oxidized during storage and processing. In order to study the effect of oxidation on the pH buffering capacity of myofibrillar proteins, myofibrils extracted from snakehead fish (Channa argus) were oxidized with H2O2. Results showed that increased oxidation led to loss of free sulfhydryl groups, formation of carbonyl groups, increased surface hydrophobicity, and aggregation of myofibrillar proteins. In addition, there was a significant reduction in the content of histidine in oxidized myofibrillar proteins. The pH buffering capacity of myofibrillar proteins significantly decreased from 3.14 ± 0.03 mM H+/(mL × ΔpH) down to 2.55 ± 0.03 mM H+/(mL × ΔpH) after oxidation with 50 mM H2O2. Both oxidized myofibrillar proteins and histidine showed a high pH buffering capacity at pH near 5.8, which is the histidine pKa value. Here, we hypothesize that oxidation-induced changes in the pH buffering capacity of myofibrillar proteins were driven by oxidative modification of histidine and structural changes of myofibrillar proteins. The significance of this study to food industry may be the awareness that protein oxidation may affect pH through changes in buffering capacity. And the use of antioxidants, especially those targeting at histidine will be promising in addressing this issue.
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Affiliation(s)
- Qingqing Yu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Hui Hong
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yueyue Liu
- Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Abdul Razak Monto
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Ruichang Gao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
| | - Yulong Bao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
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6
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Zhang M, He L, Wang Y, Li C, Jin Y, Jin G, Tang X. Excessive free radical grafting interferes with the macromolecular association and crystallization of brined porcine myofibrils during heat-set gelatinization. Food Res Int 2024; 175:113709. [PMID: 38129033 DOI: 10.1016/j.foodres.2023.113709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/30/2023] [Accepted: 11/17/2023] [Indexed: 12/23/2023]
Abstract
Free radical grafting and oxidative modification show superiority in myofibrillar protein (MP) aggregation patterns during salting process, but their consequent formation mechanisms of protein hydration network require further evaluation. Herein, we explored the effect of salt-curing (0, 1, 3 and 5 %) on MP protein polymer substrate, water-protein interaction, crystallization events and thermal stability under H2O2/ascorbate-based hydroxyl radical (•OH)-generating system (HRGS) (1, 10, 20 mM H2O2). Results showed that moderate salting (≤3%) favored the water binding of MP gels during the oxidation course. Accordingly, the maximum thermal stability (Tm) of MP gels was obtained at 3 % salting could be greatly attributed to the protein chain solubilization and refolding process. However, 5 % salt synergized with •OH oxidation intensified diffraction peak 2 (the most striking diffraction feature). Microstructural analysis validated a maximum compactness of MP gel following brining with 5 % salt at potent oxidation strength (20 mM H2O2). This study maybe promises efficient strategy to the myogenetic fibril products and biomaterials.
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Affiliation(s)
- Min Zhang
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Lichao He
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Yanbo Wang
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Chengliang Li
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yongguo Jin
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Guofeng Jin
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China.
| | - Xiaoyan Tang
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standard & Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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7
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Chen H, Zhang J, Dai H, Fu Y, Ma L, Zhang Y. Mechanism on the Synergistic Gelation of the Myofibrillar Protein Composite Gel Enhanced by "Clean-Label" Skin Functional Protein Powders. J Agric Food Chem 2023; 71:16777-16786. [PMID: 37885230 DOI: 10.1021/acs.jafc.3c05352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
The concept of healthiness and sustainability has promoted the innovation and development of "clean-label" products. Herein, this study aims to explore the influence mechanism of "clean label" skin protein powder (FPP) on the gelation properties of myofibrillar proteins (MPs). Specifically, the addition of FPP (0.2-4.0%) can improve the water holding capability and texture properties of MP composite gels. When the FPP concentration is over 1.0%, the composite gels exhibit no significant water loss during centrifugation. Dynamic rheology and sodium-dodecyl sulfate-polyacrylamide gel electrophoresis results revealed that FPP can slow the aggregation and denaturation of myosin and promote the formation of disulfide bonds between myofibril proteins, thus forming a stable network structure. Structural observation revealed that FPP can fill into the MP gel and lead to the formation of compact gel structures. Besides, with the increase of FPP concentration, the chemical forces involved in structural stabilization change significantly. Specifically, hydrophobic interaction and hydrogen bonding are the dominant forces at a lower FPP concentration (0.2 and 0.4%), while the ionic bond and disulfide bond are the dominant forces at a higher concentration. Overall, this work demonstrated that FPP can significantly improve the gel functionality of MP by altering the gel structure and strengthening the molecular forces.
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Affiliation(s)
- Hai Chen
- College of Food Science, Southwest University, Chongqing 400715, China
- Ministry of Education, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
| | - Ju Zhang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Hongjie Dai
- College of Food Science, Southwest University, Chongqing 400715, China
- Ministry of Education, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
| | - Yu Fu
- College of Food Science, Southwest University, Chongqing 400715, China
- Ministry of Education, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
| | - Liang Ma
- College of Food Science, Southwest University, Chongqing 400715, China
- Ministry of Education, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
| | - Yuhao Zhang
- College of Food Science, Southwest University, Chongqing 400715, China
- Ministry of Education, Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Chongqing 400715, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
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8
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Hau HTA, Kelu JJ, Ochala J, Hughes SM. Slow myosin heavy chain 1 is required for slow myofibril and muscle fibre growth but not for myofibril initiation. Dev Biol 2023; 499:47-58. [PMID: 37121308 PMCID: PMC10713478 DOI: 10.1016/j.ydbio.2023.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 05/02/2023]
Abstract
Slow myosin heavy chain 1 (Smyhc1) is the major sarcomeric myosin driving early contraction by slow skeletal muscle fibres in zebrafish. New mutant alleles lacking a functional smyhc1 gene move poorly, but recover motility as the later-formed fast muscle fibres of the segmental myotomes mature, and are adult viable. By motility analysis and inhibiting fast muscle contraction pharmacologically, we show that a slow muscle motility defect persists in mutants until about 1 month of age. Breeding onto a genetic background marking slow muscle fibres with EGFP revealed that mutant slow fibres undergo terminal differentiation, migration and fibre formation indistinguishable from wild type but fail to generate large myofibrils and maintain cellular orientation and attachments. In mutants, initial myofibrillar structures with 1.67 μm periodic actin bands fail to mature into the 1.96 μm sarcomeres observed in wild type, despite the presence of alternative myosin heavy chain molecules. The poorly-contractile mutant slow muscle cells generate numerous cytoplasmic organelles, but fail to grow and bundle myofibrils or to increase in cytoplasmic volume despite passive movements imposed by fast muscle. The data show that both slow myofibril maturation and cellular volume increase depend on the function of a specific myosin isoform and suggest that appropriate force production regulates muscle fibre growth.
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Affiliation(s)
- Hoi-Ting A Hau
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, SE1 1UL, UK; Centre for Human & Applied Physiological Sciences, School of Basic and Medical Biosciences, King's College London, SE1 1UL, UK
| | - Jeffrey J Kelu
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, SE1 1UL, UK
| | - Julien Ochala
- Centre for Human & Applied Physiological Sciences, School of Basic and Medical Biosciences, King's College London, SE1 1UL, UK
| | - Simon M Hughes
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, SE1 1UL, UK.
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9
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Wang Q, Gu C, Wei R, Luan Y, Liu R, Ge Q, Yu H, Wu M. Enhanced gelling properties of myofibrillar protein by ultrasound-assisted thermal-induced gelation process: Give an insight into the mechanism. Ultrason Sonochem 2023; 94:106349. [PMID: 36870098 PMCID: PMC9996090 DOI: 10.1016/j.ultsonch.2023.106349] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Effects of the incorporation of ultrasound with varied intensities (0-800 W) into the thermal-induced gelation process on the gelling properties of myofibrillar protein (MP) were explored. In comparison with single heating, ultrasound-assisted heating (<600 W) led to significant increases in gel strength (up to 17.9%) and water holding capacity (up to 32.7%). Moreover, moderate ultrasound treatment was conducive to the fabrication of compact and homogenous gel networks with small pores, which could effectively impair the fluidity of water and allow redundant water to be entrapped within the gel network. Electrophoresis revealed that the incorporation of ultrasound into the gelation process facilitated more proteins to get involved in the development of gel network. With the intensified ultrasound power, α-helix in the gels lowered pronouncedly with a simultaneous increment of β-sheet, β-turn, and random coil. Furthermore, hydrophobic interactions and disulfide bonds were reinforced by the ultrasound treatment, which was in support of the construction of preeminent MP gels.
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Affiliation(s)
- Qingling Wang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Chen Gu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Ranran Wei
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Yi Luan
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Rui Liu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Qingfeng Ge
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Hai Yu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Mangang Wu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China.
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10
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Yin Y, Xing L, Zhang W. Moderate Protein Oxidation Improves Bovine Myofibril Digestibility by Releasing Peptides in the S2 Region of Myosin: A Peptidomics Perspective. J Agric Food Chem 2023; 71:2514-2522. [PMID: 36703551 DOI: 10.1021/acs.jafc.2c07708] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
This study aimed to investigate the influence of protein oxidation on the digestive properties of beef myofibrillar protein (MP). MP was treated with a hydroxyl radical-generating system containing various concentrations of H2O2. The increased content in a free sulfhydryl group and surface hydrophobicity indicated that oxidation treatment with 1 mM H2O2 induced unfolding of MP. Reducing and nonreducing SDS-PAGE results suggested that 10 mM H2O2 oxidation treatment resulted in aggregation of MP; meanwhile, the disulfide bond was the major covalent bond involved in aggregation. Peptidomics showed that peptides in the digestion products of MP were mainly derived from myosin tail. Moderate oxidation (1 mM H2O2) facilitated the release of peptide in the rod portion (S2) of myosin, whereas excessive oxidation (10 mM H2O2) inhibited peptide release in the light meromyosin region. This work presents insightful information for the crucial impact of oxidation on meat protein digestibility from the peptidomics perspective.
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Affiliation(s)
- Yantao Yin
- Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, PR China
| | - Lujuan Xing
- Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, PR China
| | - Wangang Zhang
- Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing210095, PR China
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11
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Zheng Y, Zhang L, Qiu Z, Yu Z, Shi W, Wang X. Comparison of oxidation extent, structural characteristics, and oxidation sites of myofibrillar protein affected by hydroxyl radicals and lipid-oxidizing system. Food Chem 2022; 396:133710. [PMID: 35872498 DOI: 10.1016/j.foodchem.2022.133710] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 05/10/2022] [Accepted: 07/12/2022] [Indexed: 11/17/2022]
Abstract
To compare the differences between direct protein oxidation (PO) and lipid-derived PO, the myofibrillar protein (MP) of obscure pufferfish was oxidatively modified by the hydroxyl radical oxidizing system (HOS) and the lipid-oxidizing system (LOS). The degree of oxidation, structural characteristics, and oxidation sites in MP were assessed. The results showed there was no significant thiol loss in LOS, compared with a 77.64% loss observed in case of the HOS. The secondary structure of MP was more vulnerable to HOS, but the tertiary structure was more susceptible to LOS. The cross-linking was largely attributed to the reversible disulfide links in HOS and the irreversible covalent linkages in LOS. Six amino acids and 10 specific oxidant products were identified in HOS. Only three amino acids and three specific oxidant products were identified in LOS. These findings may help deepen the understanding regarding the mechanism underlying PO in protein- and lipid-rich food materials.
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Affiliation(s)
- Yao Zheng
- Key Laboratory of Oceanic and Polar Fisheries, Ministry of Agriculture and Rural Affairs, P.R.China; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, China; College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Long Zhang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Zehui Qiu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Zheng Yu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Wenzheng Shi
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Xichang Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China.
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12
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Cen K, Yu X, Gao C, Yang Y, Tang X, Feng X. Effects of quinoa protein Pickering emulsion on the properties, structure and intermolecular interactions of myofibrillar protein gel. Food Chem 2022; 394:133456. [PMID: 35717909 DOI: 10.1016/j.foodchem.2022.133456] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 11/18/2022]
Abstract
The effects of quinoa protein Pickering emulsion (QPE) on the gel properties, protein structure and intermolecular interactions of myofibrillar protein (MP) gels were studied. Compared with the MP gels without QPE, the MP gels with 5.0%-7.5% added QPE showed significant increasing trends in storage modulus (G'), whiteness, gel strength and water holding capacity (WHC). The content of disulfide bonds in the gel increased with the addition of QPE and the disulfide bond conformation changed from gauche-gauche-gauche to gauche-gauche-trans. Moreover, the increase of hydrogen bonds after QPE addition confirmed the transformation from α-helix to β-sheet, as β-sheet structure was stabilized by interchain hydrogen bonds. The added QPE also enhanced the hydrophobic interaction and electrostatic interaction of MP gels. To conclude, the addition of 5.0%-7.5% QPE improved the intermolecular interactions and the structure stability of MP gels, and enhanced the gelation and WHC of MP gels.
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Affiliation(s)
- Kaiyue Cen
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Xi Yu
- Faculty of Medicine, Macau University of Science and Technology, Avenida Wai Long Taipa, 999078, Macau
| | - Chengcheng Gao
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Yuling Yang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Xiaozhi Tang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
| | - Xiao Feng
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
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13
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Chen X, Chen K, Cheng H, Liang L. Soluble Aggregates of Myofibrillar Proteins Engineered by Gallic Acid: Colloidal Structure and Resistance to In Vitro Gastric Digestion. J Agric Food Chem 2022; 70:4066-4075. [PMID: 35285231 DOI: 10.1021/acs.jafc.1c05840] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Myofibrillar protein (MP)-soluble aggregates can be made by tactics of gallic acid (GA) modification during pH shifting, and this work aimed to disclose their aggregation pattern and in vitro digestion behavior. GA modification dissociated the filamentous structure of myofibrils and caused structural reassembly to form small-sized aggregates. These aggregates were evidenced to contain GA-bridged dimers and oligomers of myosin or actin, having a molecular weight of ∼1225 kDa. Additionally, the structural rearrangement significantly decreased the surface hydrophobicity while substantially increased the surface charge. As a result, the obtained colloidal solution was translucent and heat-resistant. Intriguingly, MP-soluble aggregates exhibited a retarded digestive behavior. Further evaluation by a quartz crystal microbalance suggested that the reduced binding affinity of soluble aggregates toward gastric pepsin could be the underlying reason. This work may foster the engineering advances of modulating the MP structure-digestion for the tailor manufacturing of muscle protein-based beverages.
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Affiliation(s)
- Xing Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Kaiwen Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Hao Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Li Liang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
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14
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Wang Z, Grange M, Pospich S, Wagner T, Kho AL, Gautel M, Raunser S. Structures from intact myofibrils reveal mechanism of thin filament regulation through nebulin. Science 2022; 375:eabn1934. [PMID: 35175800 DOI: 10.1126/science.abn1934] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In skeletal muscle, nebulin stabilizes and regulates the length of thin filaments, but the underlying mechanism remains nebulous. In this work, we used cryo-electron tomography and subtomogram averaging to reveal structures of native nebulin bound to thin filaments within intact sarcomeres. This in situ reconstruction provided high-resolution details of the interaction between nebulin and actin, demonstrating the stabilizing role of nebulin. Myosin bound to the thin filaments exhibited different conformations of the neck domain, highlighting its inherent structural variability in muscle. Unexpectedly, nebulin did not interact with myosin or tropomyosin, but it did interact with a troponin T linker through two potential binding motifs on nebulin, explaining its regulatory role. Our structures support the role of nebulin as a thin filament "molecular ruler" and provide a molecular basis for studying nemaline myopathies.
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Affiliation(s)
- Zhexin Wang
- Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
| | - Michael Grange
- Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
| | - Sabrina Pospich
- Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
| | - Thorsten Wagner
- Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
| | - Ay Lin Kho
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, Kings College London BHF Centre of Research Excellence, Guy's Campus, London SE1 1UL, UK
| | - Mathias Gautel
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, Kings College London BHF Centre of Research Excellence, Guy's Campus, London SE1 1UL, UK
| | - Stefan Raunser
- Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
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15
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Wang X, Feng T, Wang X, Zhang X, Xia S. Gelation and microstructural properties of fish myofibrillar protein gels with the incorporation of l-lysine and l-arginine at low ionic strength. J Sci Food Agric 2021; 101:5469-5477. [PMID: 33682127 DOI: 10.1002/jsfa.11195] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 02/27/2021] [Accepted: 03/07/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The solubility limitation and poor gelation properties of myofibrillar proteins at low ionic strength are the most challenging obstacle to limit salt reduction in meat products. In the present study, five amino acids with different concentrations of 5, 10 15, and 20 mmol L-1 , l-lysine (Lys), l-arginine (Arg), l-histidine (His), l-proline (Pro) and l-glycine (Gly), were introduced into myofibrillar protein (MP) suspensions at low ionic strength to improve solubility and gelation properties. RESULTS The dynamic rheological analysis showed that the MPs at 100 mmol L-1 NaCl containing 15/20 mmol L-1 Lys/Arg exhibited similar gelling behaviors to MPs at 600 mmol L-1 NaCl. Similarly, 15/20 mmol L-1 Lys/Arg significantly increased the solubility of MPs and the water holding capacity (WHC) and gel strength of MP gels, which was comparable to those of MPs at 600 mmol L-1 NaCl. Furthermore, Lys and Arg promoted the formation of aggregation-type gel with a dense and compact structure observed by scanning electron microscopy. The gels containing 15/20 mmol L-1 Lys/Arg exhibited a significant increase in the proportion of immobilized water (P21 ). CONCLUSION The enhancement of WHC, gel strength, and P21 was closely associated with the increased solubility and the dense microstructure induced by Lys and Arg with high concentrations of 15 and 20 mmol L-1 . The knowledge obtained from this study may be useful for the improvement of gelation properties of MPs at low ionic strength using l-lysine and l-arginine. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Xuejiao Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, People's Republic of China
| | - Tingting Feng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, People's Republic of China
| | - Xingwei Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, People's Republic of China
| | - Xiaoming Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, People's Republic of China
| | - Shuqin Xia
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
- School of Food Science and Technology, Collaborative Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, People's Republic of China
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16
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Weinberg SH, Saini N, Lemmon CA. Effects of substrate stiffness and actin velocity on in silico fibronectin fibril morphometry and mechanics. PLoS One 2021; 16:e0248256. [PMID: 34106923 PMCID: PMC8189481 DOI: 10.1371/journal.pone.0248256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 05/14/2021] [Indexed: 12/03/2022] Open
Abstract
Assembly of the extracellular matrix protein fibronectin (FN) into insoluble, viscoelastic fibrils is a critical step during embryonic development and wound healing; misregulation of FN fibril assembly has been implicated in many diseases, including fibrotic diseases and cancer. We have previously developed a computational model of FN fibril assembly that recapitulates the morphometry and mechanics of cell-derived FN fibrils. Here we use this model to probe two important questions: how is FN fibril formation affected by the contractile phenotype of the cell, and how is FN fibril formation affected by the stiffness of the surrounding tissue? We show that FN fibril formation depends strongly on the contractile phenotype of the cell, but only weakly on in vitro substrate stiffness, which is an analog for in vivo tissue stiffness. These results are consistent with previous experimental data and provide a better insight into conditions that promote FN fibril assembly. We have also investigated two distinct phenotypes of FN fibrils that we have previously identified; we show that the ratio of the two phenotypes depends on both substrate stiffness and contractile phenotype, with intermediate contractility and high substrate stiffness creating an optimal condition for stably stretched fibrils. Finally, we have investigated how re-stretch of a fibril affects cellular response. We probed how the contractile phenotype of the re-stretching cell affects the mechanics of the fibril; results indicate that the number of myosin motors only weakly affects the cellular response, but increasing actin velocity results in a decrease in the apparent stiffness of the fibril and a decrease in the stably-applied force to the fibril. Taken together, these results give novel insights into the combinatorial effects of substrate stiffness and cell contractility on FN fibril assembly.
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Affiliation(s)
- Seth H. Weinberg
- Department of Biomedical Engineering, Ohio State University, Columbus, OH, United States of America
- * E-mail: (CAL); (SHW)
| | - Navpreet Saini
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States of America
| | - Christopher A. Lemmon
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States of America
- * E-mail: (CAL); (SHW)
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17
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Cao Y, Li B, Fan X, Wang J, Zhu Z, Huang J, Xiong YL. Synergistic recovery and enhancement of gelling properties of oxidatively damaged myofibrillar protein by l-lysine and transglutaminase. Food Chem 2021; 358:129860. [PMID: 33933959 DOI: 10.1016/j.foodchem.2021.129860] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 04/01/2021] [Accepted: 04/09/2021] [Indexed: 11/19/2022]
Abstract
The influence of combined Lysine (Lys) and transglutaminase (TG) on the conformation and gelling properties of oxidatively damaged myofibrillar protein (MP) was investigated. The addition of Lys (5 mM) significantly increased the α-helix content (by 47.8%) and decreased the particle size of oxidatively damaged MP, and improved the cooking yield (by 16.8%) and the breaking strength of MP gels (by 65.5%). The treatment with TG (E:S = 1:500) led to a slightly reduced α-helix content but improved breaking strength (by 41.8%) and cooking loss (by 13.3%) of the gels. Their combination (Lys + TG) showed the greatest and synergistic overall improvement, with the set gel displaying a fine, smooth and compact network structure. Notably, the gelling ability of oxidatively damaged MP upon Lys + TG treatment was significantly stronger than that of non-oxidized MP far exceeding its recovery. Therefore, significantly enhanced gelling properties of oxidatively damaged MP can be attained through the combination Lys and TG.
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Affiliation(s)
- Yungang Cao
- School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi' an 710021, China
| | - Baoling Li
- School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi' an 710021, China
| | - Xin Fan
- School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi' an 710021, China
| | - Jiankang Wang
- School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi' an 710021, China
| | - Zhenbao Zhu
- School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi' an 710021, China
| | - Junrong Huang
- School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi' an 710021, China.
| | - Youling L Xiong
- Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 40546, United States.
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18
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Li J, Chen Y, Dong X, Li K, Wang Y, Wang Y, Du M, Zhang J, Bai Y. Effect of chickpea (Cicer arietinum L.) protein isolate on the heat-induced gelation properties of pork myofibrillar protein. J Sci Food Agric 2021; 101:2108-2116. [PMID: 32978960 DOI: 10.1002/jsfa.10833] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 09/19/2020] [Accepted: 09/26/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Heat-induced composite gels were prepared with 30 mg mL-1 pork myofibrillar protein (MP) and chickpea protein isolate (CPI) (0, 3, 6, 9, 12, and 15 g kg-1 ) in 0.6 mol L-1 NaCl, at pH 7.0. The gel strength, water-holding capacity, rheological properties, and microstructure of MP-CPI composite gels were investigated. RESULTS Chickpea protein isolate improved (P < 0.05) gel strength and water-holding capacity of the MP composite gels. The rheological properties of MP-CPI composite gels were improved significantly by the addition of CPI. Meanwhile, the effects of CPI on the storage modulus of composite gels were positively correlated with the increased addition of CPI. Furthermore, according to low-field nuclear magnetic resonance (LF-NMR) results, the addition of CPI reduced the relaxation time of the composite gels and the relaxation peak area of free water, indicating that CPI could improve the water-holding capacity of MP-CPI composite gels. The microstructure of MP-CPI composite gels presented smaller and more uniform pores, which means that more water could be retained. CONCLUSION The addition of chickpea protein isolate improved the gel strength, water-holding capacity, rheological properties, and microstructure of MP gels, indicating that CPI could be a potential protein additive to improve the microstructure, texture, and functional quality of meat products. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Junguang Li
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian, PR China
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
| | - Yuhao Chen
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
| | - Xiuping Dong
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian, PR China
| | - Ke Li
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
| | - Yuntao Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
| | - Yu Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
| | - Manting Du
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
| | - Junjie Zhang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
| | - Yanhong Bai
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian, PR China
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, PR China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou, PR China
- Henan Collaborative Innovation Center for Food Production and Safety, Zhengzhou, PR China
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19
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Mijailovich SM, Prodanovic M, Poggesi C, Powers JD, Davis J, Geeves MA, Regnier M. The effect of variable troponin C mutation thin filament incorporation on cardiac muscle twitch contractions. J Mol Cell Cardiol 2021; 155:112-124. [PMID: 33636222 DOI: 10.1016/j.yjmcc.2021.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 11/19/2022]
Abstract
One of the complexities of understanding the pathology of familial forms of cardiac diseases is the level of mutation incorporation in sarcomeres. Computational models of the sarcomere that are spatially explicit offer an approach to study aspects of mutational incorporation into myofilaments that are more challenging to get at experimentally. We studied two well characterized mutations of cardiac TnC, L48Q and I61Q, that decrease or increase the release rate of Ca2+ from cTnC, k-Ca, resulting in HCM and DCM respectively [1]. Expression of these mutations in transgenic mice was used to provide experimental data for incorporation of 30 and 50% (respectively) into sarcomeres. Here we demonstrate that fixed length twitch contractions of trabeculae from mice containing mutant differ from WT; L48Q trabeculae have slower relaxation while I61Q trabeculae have markedly reduced peak tension. Using our multiscale modelling approach [2] we were able to describe the tension transients of WT mouse myocardium. Tension transients for the mutant cTnCs were simulated with changes in k-Ca, measured experimentally for each cTnC mutant in whole troponin complex, a change in the affinity of cTnC for cTnI, and a reduction in the number of detached crossbridges available for binding. A major advantage of the multiscale explicit 3-D model is that it predicts the effects of variable mutation incorporation, and the effects of variations in mutation distribution within thin filaments in sarcomeres. Such effects are currently impossible to explore experimentally. We explored random and clustered distributions of mutant cTnCs in thin filaments, as well as distributions of individual thin filaments with only WT or mutant cTnCs present. The effects of variable amounts of incorporation and non-random distribution of mutant cTnCs are more marked for I61Q than L48Q cTnC. We conclude that this approach can be effective for study on mutations in multiple proteins of the sarcomere. SUMMARY: A challenge in experimental studies of diseases is accounting for the effect of variable mutation incorporation into myofilaments. Here we use a spatially explicit computational approach, informed by experimental data from transgenic mice expressing one of two mutations in cardiac Troponin C that increase or decrease calcium sensitivity. We demonstrate that the model can accurately describe twitch contractions for the data and go on to explore the effect of variable mutant incorporation and localization on simulated cardiac muscle twitches.
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Affiliation(s)
| | - Momcilo Prodanovic
- Bioengineering Research and Development Center (BioIRC), Kragujevac 34000, Serbia; Faculty of Engineering, University of Kragujevac, Kragujevac 34000, Serbia
| | - Corrado Poggesi
- Department of Experimental & Clinical Medicine, University of Florence, Florence 50134, Italy
| | - Joseph D Powers
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA; Dept. of Bioengineering, University of California, San Diego, CA 92093, USA
| | - Jennifer Davis
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA
| | - Michael A Geeves
- Dept. of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Michael Regnier
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA
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20
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Guo A, Jiang J, True AD, Xiong YL. Myofibrillar Protein Cross-Linking and Gelling Behavior Modified by Structurally Relevant Phenolic Compounds. J Agric Food Chem 2021; 69:1308-1317. [PMID: 33494593 DOI: 10.1021/acs.jafc.0c04365] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Protein gelation is an important phenomenon in processed meats. The present study investigated the structure-activity relationship of six phenolic compounds, that is, gallic acid (GA), chlorogenic acid (CA), propyl gallate (PG), quercetin (QT), catechin (CC), and (-)-epigallocatechin-3-gallate (EGCG) in a myofibrillar protein (MP) gelling system under controlled oxidative conditions. All phenolics induced unfolding and promoted cross-linking of MP via sulfhydryl or amine groups. At an equal molar concentration, EGCG boosted the elastic MP gel network more than other phenolics except PG. However, all three monophenols (GA, CA, and PG) and the diphenol QT increased the MP gel strength more than CC (diphenol) and EGCG (triphenol). The flavanol structure appeared to interfere with the protein gel structure development. All phenolics retarded lipid oxidation in MP-emulsion composite gels during refrigerated storage with the least polar phenolic compounds, PG and QT, showing the greatest efficacy.
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Affiliation(s)
- Anqi Guo
- Department of Animal and Food Sciences, University of Kentucky, Lexington, Kentucky 40546, United States
| | - Jiang Jiang
- College of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Alma D True
- Department of Animal and Food Sciences, University of Kentucky, Lexington, Kentucky 40546, United States
| | - Youling L Xiong
- Department of Animal and Food Sciences, University of Kentucky, Lexington, Kentucky 40546, United States
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21
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Xu M, Sun M, Lu C, Han Y, Yao X, Niu X, Xu M, Zhu Q. Influence of epicatechin on oxidation-induced physicochemical and digestibility changes in porcine myofibrillar proteins during refrigerated storage. J Sci Food Agric 2021; 101:746-753. [PMID: 32706121 DOI: 10.1002/jsfa.10687] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 07/18/2020] [Accepted: 07/24/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The influence of epicatechin (EC) on the physicochemical properties and digestibility changes of porcine myofibrillar protein (MP) under oxidative stress during refrigerated storage was investigated. RESULTS The incubation of MP suspensions (20 mg mL-1 in piperazine-N,N'-bis(2-ethanesulfonic acid) buffer, with 0.6 mol L-1 sodium chloride, pH 6.25) at 4 °C for 24 h under an iron-catalyzed hydroxyl radical generating system (Fenton reaction) promoted the formation of thiobarbituric acid reactive substances and protein carbonyls, which was attenuated by EC (5, 50, and 100 μmol g-1 protein). Reduced protein sulfhydryl content, tryptophan fluorescence, protein solubility, as well as increased surface hydrophobicity were found by the co-incubation of EC. Analysis by scanning electron microscopy revealed increased protein aggregation and fragments in oxidized MP, which were further enhanced by the addition of EC. However, the protein digestibility of MP was not affected. CONCLUSION EC was demonstrated to be effective in alleviating lipid oxidation and protein carbonylation in MP under oxidative stress. Additionally, the physicochemical and digestibility changes accompanying the incorporation of EC was complicated due to the possible phenol-protein interactions. An in-depth understanding of protein physicochemical and digestibility changes will be helpful in the application of polyphenolic compounds as antioxidants in low-temperature-processed muscle foods. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Mingfeng Xu
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Manfei Sun
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Cairu Lu
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Yating Han
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Xing Yao
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Xiaoying Niu
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Maojun Xu
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
| | - Qin Zhu
- Key Laboratory for Quality and Safety of Agricultural Products of Hangzhou City, College of Life and Environmental Science, Hangzhou Normal University, Zhejiang, P. R. China
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Yan H, Yu B, Degroote J, Spranghers T, Van Noten N, Majdeddin M, Van Poucke M, Peelman L, De Vrieze J, Boon N, Gielen I, Smet SD, Chen D, Michiels J. Antibiotic affects the gut microbiota composition and expression of genes related to lipid metabolism and myofiber types in skeletal muscle of piglets. BMC Vet Res 2020; 16:392. [PMID: 33066774 PMCID: PMC7568366 DOI: 10.1186/s12917-020-02592-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 09/28/2020] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Early-life antibiotic administration is known to affect gut microbiota and host adiposity, but the effects of antibiotic exposure on skeletal muscle properties remain unknown. The present study evaluated the changes in skeletal muscle properties including myofiber characteristics and composition, as well as intramuscular fat (IMF) content in skeletal muscle of piglets when exposed to a tylosin-containing diet. RESULTS A total of 18 piglets (28 days of age) were randomly allocated into two groups: control basal diet (Control) and Control + 100 mg tylosin phosphate/kg of feed (Antibiotic). The trial lasted for 39 days. High-throughput amplicon sequencing revealed that no significant difference in initial gut microbiota composition was existed between Control and Antibiotic groups. Antibiotic administration increased body weight and growth rate and decreased feed to gain ratio of pigs (P < 0.05). The carcass lean and fat volumes of pigs were increased by the tylosin administration (P < 0.05). Antibiotic treatment increased myofiber density and the expression of genes related to type I and type IIb myofibers in longissimus muscle (P < 0.05). The IMF content in longissimus muscle was increased by antibiotic exposure (P < 0.05). Antibiotic administration increased expression of genes related to fatty acid uptake and de novo synthesis, and decreased expression of genes related to triglyceride hydrolysis (P < 0.05). Tylosin administration affected taxonomic distribution and beta diversity of the caecal and colonic microbiota of piglets. CONCLUSION These results confirm that the growth performance, myofiber composition and muscle lipid metabolism are affected by antibiotic administration, which may be associated with an altered gut microbiota, suggesting that the gut microbiota could be served as a potential target for modulating skeletal muscle properties of host.
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Affiliation(s)
- Honglin Yan
- Animal Nutrition Institute, Sichuan Agricultural University, Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, China, Ya'an, 625014, People's Republic of China
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, People's Republic of China
| | - Bing Yu
- Animal Nutrition Institute, Sichuan Agricultural University, Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, China, Ya'an, 625014, People's Republic of China
| | - Jeroen Degroote
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Thomas Spranghers
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Noémie Van Noten
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Maryam Majdeddin
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Mario Van Poucke
- Department of Nutrition, Genetics and Ethology, Ghent University, Heidestraat 19, 9820, Merelbeke, Belgium
| | - Luc Peelman
- Department of Nutrition, Genetics and Ethology, Ghent University, Heidestraat 19, 9820, Merelbeke, Belgium
| | - Jo De Vrieze
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Ingrid Gielen
- Department of Medical Imaging and Small Animal Orthopaedics, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Stefaan De Smet
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
| | - Daiwen Chen
- Animal Nutrition Institute, Sichuan Agricultural University, Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, China, Ya'an, 625014, People's Republic of China.
| | - Joris Michiels
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
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Chen K, Chen X, Liang L, Xu X. Gallic Acid-Aided Cross-Linking of Myofibrillar Protein Fabricated Soluble Aggregates for Enhanced Thermal Stability and a Tunable Colloidal State. J Agric Food Chem 2020; 68:11535-11544. [PMID: 32815729 DOI: 10.1021/acs.jafc.0c02059] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Low colloidal stability of myofibrillar protein (MP) during heating is a technofunctional constraint encountered in its beverage application. Gallic acid (GA), a natural polyphenol, was applied to fabricate MP soluble aggregates for an enhanced thermal stability. Upon pH shifting, GA was grafted into MP with the cysteine and tryptophan residues being the binding sites. As a result, the antioxidant activity of MP was enhanced. Additionally, GA modification decreased the α-helix structure of MP and converted MP into cross-linked aggregates. At low dosages (10 and 25 μmol/g GA), disulfide-dominant covalent bonds were formed to generate myosin and actin aggregates, while MP aggregates were mostly bridged through GA-thiols or GA-tryptophan adducts when the dosages exceeded 50 μmol/g. Such aggregates prevented MP from thermal gelation, leading to a stable and tunable colloidal state. This work can foster technological advances in the tailor manufacture of muscle protein-based beverages for special dietary uses.
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Affiliation(s)
- Kaiwen Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Xing Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Li Liang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Xinglian Xu
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
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Pollmann C, Haug M, Reischl B, Prölß G, Pöschel T, Rupitsch SJ, Clemen CS, Schröder R, Friedrich O. Growing Old Too Early: Skeletal Muscle Single Fiber Biomechanics in Ageing R349P Desmin Knock-in Mice Using the MyoRobot Technology. Int J Mol Sci 2020; 21:ijms21155501. [PMID: 32752098 PMCID: PMC7432536 DOI: 10.3390/ijms21155501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/21/2020] [Accepted: 07/28/2020] [Indexed: 11/16/2022] Open
Abstract
Muscle biomechanics relies on active motor protein assembly and passive strain transmission through cytoskeletal structures. The desmin filament network aligns myofibrils at the z-discs, provides nuclear–sarcolemmal anchorage and may also serve as memory for muscle repositioning following large strains. Our previous analyses of R349P desmin knock-in mice, an animal model for the human R350P desminopathy, already depicted pre-clinical changes in myofibrillar arrangement and increased fiber bundle stiffness. As the effect of R349P desmin on axial biomechanics in fully differentiated single muscle fibers is unknown, we used our MyoRobot to compare passive visco-elasticity and active contractile biomechanics in single fibers from fast- and slow-twitch muscles from adult to senile mice, hetero- or homozygous for the R349P desmin mutation with wild type littermates. We demonstrate that R349P desmin presence predominantly increased axial stiffness in both muscle types with a pre-aged phenotype over wild type fibers. Axial viscosity and Ca2+-mediated force were largely unaffected. Mutant single fibers showed tendencies towards faster unloaded shortening over wild type fibers. Effects of aging seen in the wild type appeared earlier in the mutant desmin fibers. Our single-fiber experiments, free of extracellular matrix, suggest that compromised muscle biomechanics is not exclusively attributed to fibrosis but also originates from an impaired intermediate filament network.
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Affiliation(s)
- Charlotte Pollmann
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Paul-Gordan-Str. 3, 91052 Erlangen, Bavaria, Germany; (C.P.); (B.R.); (G.P.); (O.F.)
| | - Michael Haug
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Paul-Gordan-Str. 3, 91052 Erlangen, Bavaria, Germany; (C.P.); (B.R.); (G.P.); (O.F.)
- Graduate School in Advanced Optical Technologies, Paul-Gordan-Str. 6, 91052 Erlangen, Bavaria, Germany
- School of Medical Sciences, University of New South Wales, Wallace Wurth Building, 18 High St, Sydney, NSW 2052, Australia
- Correspondence:
| | - Barbara Reischl
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Paul-Gordan-Str. 3, 91052 Erlangen, Bavaria, Germany; (C.P.); (B.R.); (G.P.); (O.F.)
| | - Gerhard Prölß
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Paul-Gordan-Str. 3, 91052 Erlangen, Bavaria, Germany; (C.P.); (B.R.); (G.P.); (O.F.)
| | - Thorsten Pöschel
- Institute of Multi Scale Simulation of Particulate Systems, Friedrich-Alexander-University Erlangen-Nürnberg, Nägelbachstr. 49b, 91052 Erlangen, Bavaria, Germany;
| | - Stefan J Rupitsch
- Institute of Sensor Technology, Friedrich-Alexander-University Erlangen-Nürnberg, Paul-Gordan-Str. 3/5, 91052 Erlangen, Bavaria, Germany;
| | - Christoph S Clemen
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, North Rhine-Westphalia, Germany;
- Institute of Neuropathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Bavaria, Germany;
- Insitute of Vegetative Physiology, Medical Faculty, University of Cologne, Center of Physiology and Pathophysiology, Robert-Koch-Street 39, 50931 Cologne, North Rhine-Westphalia, Germany
| | - Rolf Schröder
- Institute of Neuropathology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Bavaria, Germany;
- Muscle Research Center Erlangen (MURCE), Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Bavaria, Germany
| | - Oliver Friedrich
- Institute of Medical Biotechnology, Friedrich-Alexander-University Erlangen-Nürnberg, Paul-Gordan-Str. 3, 91052 Erlangen, Bavaria, Germany; (C.P.); (B.R.); (G.P.); (O.F.)
- Graduate School in Advanced Optical Technologies, Paul-Gordan-Str. 6, 91052 Erlangen, Bavaria, Germany
- School of Medical Sciences, University of New South Wales, Wallace Wurth Building, 18 High St, Sydney, NSW 2052, Australia
- Muscle Research Center Erlangen (MURCE), Friedrich-Alexander-University Erlangen-Nürnberg, 91054 Erlangen, Bavaria, Germany
- Victor Chang Cardiac Research Institute, Lowy Packer Building, 405 Liverpool St, Sydney, NSW 2010, Australia
- Optical Imaging Centre Erlangen OICE, Cauerstr. 3, 91058 Erlangen, Bavaria, Germany
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Li Z, Wang J, Zheng B, Guo Z. Impact of combined ultrasound-microwave treatment on structural and functional properties of golden threadfin bream (Nemipterus virgatus) myofibrillar proteins and hydrolysates. Ultrason Sonochem 2020; 65:105063. [PMID: 32199256 DOI: 10.1016/j.ultsonch.2020.105063] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 03/07/2020] [Accepted: 03/08/2020] [Indexed: 05/13/2023]
Abstract
The effects of microwave, ultrasound and combined ultrasound-microwave (UM) treatment with different intensities on structural and hydrolysis properties of myofibrillar protein (MP) were investigated. Freeradical scavenging ability, angiotensin-I-converting enzyme (ACE) inhibitory activity, and cellular antioxidant and anti-inflammatory abilities of the related bioactive peptides were also evaluated. Raman spectroscopic analysis indicated that MP molecule tended to unfold and stretch with increasing in β-turn and random coil content under mild microwave (100 W), ultrasound (100-200 W) and combined UM treatments. Meanwhile, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) revealed these treatments could also improve the thermal stability against heat-induced denaturation and degeneration. The 200 W ultrasound treatment clearly increased MP solubility by disrupting the highly-ordered aggregates into smaller filament and fragment structures. The 300 W ultrasound coupled with 100 W microwave treatment further enhanced these effects. The resulting partially denatured structure induced by suitable ultrasound and combined UM treatments increased the susceptibility of MP to exogenous enzymes, thereby accelerating hydrolytic process and yielding a high peptide concentration in MP hydrolysates. MP peptides could effectively inhibit free radical and ACE activity, which also improved the ability of antioxidant defence system, and suppressed the production of proinflammatory cytokines in RAW 264.7 cells stimulated by H2O2. The combination of 100 W microwave and 300 W ultrasound treatment was optimal method for generating bioactive MP peptides with the strongest multi-activity effects against H2O2-induced cell damage.
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Affiliation(s)
- Zhiyu Li
- Engineering Research Centre of Fujian-Taiwan Special Marine Food Processing and Nutrition, Ministry of Education, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China; College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Jianyi Wang
- Engineering Research Centre of Fujian-Taiwan Special Marine Food Processing and Nutrition, Ministry of Education, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China; College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Baodong Zheng
- Engineering Research Centre of Fujian-Taiwan Special Marine Food Processing and Nutrition, Ministry of Education, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China; College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; State Key Laboratory of Food Safety and Technology for Meat Products, Xiamen, Fujian 361100, China; Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Zebin Guo
- Engineering Research Centre of Fujian-Taiwan Special Marine Food Processing and Nutrition, Ministry of Education, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China; College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; State Key Laboratory of Food Safety and Technology for Meat Products, Xiamen, Fujian 361100, China; Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
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Xu Y, Wang R, Zhao H, Zhao J, Li X, Yi S, Li J, Sun X. Binding of aldehydes to myofibrillar proteins as affected by two-step heat treatments. J Sci Food Agric 2020; 100:1195-1203. [PMID: 31721226 DOI: 10.1002/jsfa.10130] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/15/2019] [Accepted: 11/01/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND The present study investigated the effect of two-step heat treatments on the structure of grass carp myofibrillar proteins (MPs) and their binding ability for selected aldehydes (hexanal, heptanal, octanal and nonanal). RESULTS Within 30 min of the first heating step at 40 °C and 5-10 min of the second heating step at 90 °C, the enhancement of the flavor-binding ability was likely explained by the increases in surface hydrophobicity and total sulfhydryl content due to the unfolding of secondary structures of MPs through exposure of hydrophobic amino acids and sulfhydryl groups. Nevertheless, lengthy heating at 90 °C accelerated the aggregation of unfolded MPs and reduced the hydrophobic bonding sites, thus weakening the hydrophobic interactions and decreasing the resultant binding ability of MPs with aldehydes. CONCLUSION The binding ability of aldehydes to MPs was found to be strongly influenced by changes in protein structure and surface during the two-step heating process. The results provided insight into improving the flavor characteristics of freshwater fish surimi products. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Yongxia Xu
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, China
| | - Rui Wang
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
| | - Honglei Zhao
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
| | - Jiamei Zhao
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
| | - Xuepeng Li
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
| | - Shumin Yi
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
| | - Jianrong Li
- National R&D Branch Center of Surimi and Surimi Products Processing, College of Food Science and Engineering, Bohai University, Jinzhou, China
| | - Xiaotao Sun
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, China
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Wu M, Wang J, Hu J, Li Z, Liu R, Liu Y, Cao Y, Ge Q, Yu H. Effect of typical starch on the rheological properties and NMR characterization of myofibrillar protein gel. J Sci Food Agric 2020; 100:258-267. [PMID: 31512250 DOI: 10.1002/jsfa.10033] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/19/2019] [Accepted: 09/03/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Composite gels were individually prepared from 20 g kg-1 myofibrillar protein (MP) imbedded with typical native starch (potato, tapioca, rice or corn starch) in 0.6 mol L-1 NaCl at pH 6.2. The gel strength, water holding capacity, rheological properties and microstructure of the obtained myofibrillar protein-starch composite gels were evaluated. RESULTS Tapioca starch improved (P < 0.05) gel strength and water holding capacity of MP composite gel at 80 °C. Rheological properties of MP-starch composites differed significantly with the addition of different types of native starch. Additionally, the promoting effect of starch on the storage modulus of the composite gels positively correlated with the gelatinization properties of different typical starch. Environmental scanning electron microscopy showed that the filling effect of starch on the composite gel was related to the pasting temperature and particle size of typical starch, with almost no particles forming at 80 °C. Moreover, the addition of starch changed the relaxation peak area and increased the relaxation time in nuclear magnetic resonance tests, which suggested that starch could improve the water holding capacity of MP-starch composite gels. CONCLUSION Different typical native starch has varied impacts on the gel strength, water holding capacity, rheological properties and microstructure of MP gels, indicating the potential and feasibility of these typical native starches as an addition agent to modify the textural properties in comminuted meat products. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Mangang Wu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
- Industrial Engineering Center for Huaiyang Cuisin of Jiangsu Province, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou, China
| | - Jiahao Wang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Juan Hu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Zhikun Li
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Rui Liu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Yang Liu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Yan Cao
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Qingfeng Ge
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
- Industrial Engineering Center for Huaiyang Cuisin of Jiangsu Province, Yangzhou University, Yangzhou, China
| | - Hai Yu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
- Industrial Engineering Center for Huaiyang Cuisin of Jiangsu Province, Yangzhou University, Yangzhou, China
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Xu Y, Zhao J, Wang R, Li X, Mi H, Li J. Effect of heat treatment on the binding of selected flavor compounds to myofibrillar proteins. J Sci Food Agric 2019; 99:5028-5034. [PMID: 30989657 DOI: 10.1002/jsfa.9744] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/29/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND The influence of heat-induced structural modifications of grass carp myofibrillar protein (MP) on its ability to bind to selected aldehydes (hexanal, heptanal, octanal and nonanal) was investigated. The interactions of MP and flavor compounds were investigated using HS-GC-MS, intrinsic fluorescence spectra, Raman spectra, SDS-PAGE, turbidity, total sulfhydryl content and surface hydrophobicity. RESULTS The ability to bind to aldehydes was strongly influenced by changes in the structure and surface of proteins during the heating process (0-30 min). During the first 0-10 min of heating, the flavor-binding ability increased, which is likely attributable to increased surface hydrophobicity and total sulfhydryl content, and to the unfolding of secondary structures of MP by exposure to reactive amino acids, sulfhydryl groups and hydrophobic bonding sites. Nevertheless, lengthy heating (>10 min) caused protein refolding and accelerated aggregation of protein, thus reducing hydrophobic interactions and weakening the resultant capacity of MP to bind to flavor compounds. CONCLUSION The results suggested that hydrophobic interactions were enhanced upon short-term heating, whereas long-term heating weakend them. The results provide information concerning improvement of the flavor profile of freshwater fish surimi products. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Yongxia Xu
- College of Food Science, Southwest University, Chongqing, China
- College of Food Science and Engineering, National R&D Branch Center of Surimi and Surimi Products Processing, Bohai University, Jinzhou, China
| | - Jiamei Zhao
- College of Food Science and Engineering, National R&D Branch Center of Surimi and Surimi Products Processing, Bohai University, Jinzhou, China
| | - Rui Wang
- College of Food Science and Engineering, National R&D Branch Center of Surimi and Surimi Products Processing, Bohai University, Jinzhou, China
| | - Xuepeng Li
- College of Food Science and Engineering, National R&D Branch Center of Surimi and Surimi Products Processing, Bohai University, Jinzhou, China
| | - Hongbo Mi
- College of Food Science and Engineering, National R&D Branch Center of Surimi and Surimi Products Processing, Bohai University, Jinzhou, China
| | - Jianrong Li
- College of Food Science, Southwest University, Chongqing, China
- College of Food Science and Engineering, National R&D Branch Center of Surimi and Surimi Products Processing, Bohai University, Jinzhou, China
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Qi K, Men X, Wu J, Xu Z. Rearing pattern alters porcine myofiber type, fat deposition, associated microbial communities and functional capacity. BMC Microbiol 2019; 19:181. [PMID: 31387544 PMCID: PMC6683424 DOI: 10.1186/s12866-019-1556-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/26/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The Chinese believe that the meat of pigs reared in the past with free range tastes better than that of the pigs reared indoor on a large scale today. Gastrointestinal microflora is closely associated with the main factor of meat flavour, including fibre characteristics and lipid metabolism. Our method in this study involved different raising patterns within the semi free-grazing farm (FF) or indoor feeding farm (DF), the measurement of fat deposition and myofiber type by paraffin section and reverse transcription polymerase chain reaction and the identification of microbiome and functional capacities associated with meat quality through metagenomic sequencing. RESULTS Results showed that the fat area in muscle and adipose tissue and the myofiber density significantly increased in the pigs of the FF group. The relative abundance of bacteria associated with lipid metabolism, such as g_Oscillibacter, in the feces of the FF group was higher than that in DF group, and the relative abundance of some bacteria with probiotic function, including g_Lactobacillus and g_Clostridium, was lower than that in DF group. The abundance of g_Clostridium was significantly positively correlated with the intramuscular fat area, whereas health-related bacteria, such as g_Butyricicoccus, g_Eubacterium, g_Phascolarctobacterium and g_Oribacterium, was significantly negatively correlated with abdominal fat area, myofiber density and adipose triglyceride lipase (ATGL) mRNA expression. KEGG analysis showed that pigs raised in semi free-grazing farm can activate the pathway of inosine monophosphate (IMP) biosynthesis, glycolysis/gluconeogenesis and alanine, aspartate and glutamate metabolism. CONCLUSIONS Free range feeding improves meat quality by changing the fibre type, myofiber density and metabolic pathways related to flavour amino acids, IMP or glycolysis/gluconeogenesis in muscle. However, prolonged feeding cycle increases fat deposition and associated microbial communities.
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Affiliation(s)
- Keke Qi
- Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, 145 Shiqiao Road, Jianggan, Hangzhou, 310021 People’s Republic of China
| | - Xiaoming Men
- Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, 145 Shiqiao Road, Jianggan, Hangzhou, 310021 People’s Republic of China
| | - Jie Wu
- Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, 145 Shiqiao Road, Jianggan, Hangzhou, 310021 People’s Republic of China
| | - Ziwei Xu
- Institute of Animal Science, Zhejiang Academy of Agricultural Sciences, 145 Shiqiao Road, Jianggan, Hangzhou, 310021 People’s Republic of China
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30
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Abstract
Understanding and predicting the mechanical behavior of myocardium under healthy and pathophysiological conditions are vital to developing novel cardiac therapies and promoting personalized interventions. Within the past 30 years, various constitutive models have been proposed for the passive mechanical behavior of myocardium. These models cover a broad range of mathematical forms, microstructural observations, and specific test conditions to which they are fitted. We present a critical review of these models, covering both phenomenological and structural approaches, and their relations to the underlying structure and function of myocardium. We further explore the experimental and numerical techniques used to identify the model parameters. Next, we provide a brief overview of continuum-level electromechanical models of myocardium, with a focus on the methods used to integrate the active and passive components of myocardial behavior. We conclude by pointing to future directions in the areas of optimal form as well as new approaches for constitutive modeling of myocardium.
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Affiliation(s)
- Reza Avazmohammadi
- James T. Willerson Center for Cardiovascular Modeling and Simulation, Oden Institute for Computational Engineering and Sciences, and Department of Biomedical Engineering, University of Texas, Austin, Texas 78712, USA;
| | - João S Soares
- James T. Willerson Center for Cardiovascular Modeling and Simulation, Oden Institute for Computational Engineering and Sciences, and Department of Biomedical Engineering, University of Texas, Austin, Texas 78712, USA;
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA
| | - David S Li
- James T. Willerson Center for Cardiovascular Modeling and Simulation, Oden Institute for Computational Engineering and Sciences, and Department of Biomedical Engineering, University of Texas, Austin, Texas 78712, USA;
| | - Samarth S Raut
- James T. Willerson Center for Cardiovascular Modeling and Simulation, Oden Institute for Computational Engineering and Sciences, and Department of Biomedical Engineering, University of Texas, Austin, Texas 78712, USA;
| | - Robert C Gorman
- Gorman Cardiovascular Research Group, Smilow Center for Translational Research, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Michael S Sacks
- James T. Willerson Center for Cardiovascular Modeling and Simulation, Oden Institute for Computational Engineering and Sciences, and Department of Biomedical Engineering, University of Texas, Austin, Texas 78712, USA;
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Fu Q, Liu R, Wang H, Hua C, Song S, Zhou G, Zhang W. Effects of Oxidation in Vitro on Structures and Functions of Myofibrillar Protein from Beef Muscles. J Agric Food Chem 2019; 67:5866-5873. [PMID: 31026156 DOI: 10.1021/acs.jafc.9b01239] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The main purpose of this study was to investigate the effects of oxidation in vitro on the biochemical properties of myofibrillar protein isolates (MPIs) from beef muscles. MPIs were incubated at 4 °C for 24 h with hydroxyl-radical-generating systems consisting of 0.01 mM FeCl3 and 0.1 mM ascorbic acid plus 0, 0.2, 1, 5, 10, and 20 mM hydrogen peroxide. The results showed that oxidation caused drastically structural changes in bovine MPIs. The carbonyl content, the surface hydrophobicity, and the particle diameter of MPIs were significantly increased, while the free sulfhydryl group content was dramatically decreased with increasing hydrogen peroxide concentrations. Oxidation caused the protein aggregations through cross-linking between proteins and amino acids. Proteomics study identified protein sites in which they were easy to be oxidized. Oxidized catalytic activities and binding sites of enzymes that were susceptible to oxidation were also identified.
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Affiliation(s)
- Qingquan Fu
- Jiangsu Provincial Key Construction Laboratory of Special Biomass Waste Resource Utilization, School of Food Science , Nanjing Xiaozhuang University , Nanjing , Jiangsu 211171 , People's Republic of China
| | - Rui Liu
- College of Food Science and Engineering , Yangzhou University , Yangzhou , Jiangsu 225127 , People's Republic of China
| | - Haiou Wang
- Jiangsu Provincial Key Construction Laboratory of Special Biomass Waste Resource Utilization, School of Food Science , Nanjing Xiaozhuang University , Nanjing , Jiangsu 211171 , People's Republic of China
| | - Chun Hua
- Jiangsu Provincial Key Construction Laboratory of Special Biomass Waste Resource Utilization, School of Food Science , Nanjing Xiaozhuang University , Nanjing , Jiangsu 211171 , People's Republic of China
| | - Shangxin Song
- Jiangsu Provincial Key Construction Laboratory of Special Biomass Waste Resource Utilization, School of Food Science , Nanjing Xiaozhuang University , Nanjing , Jiangsu 211171 , People's Republic of China
| | - Guanghong Zhou
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education (MOE), Key Laboratory of Meat Processing, Ministry of Agriculture (MOA), Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control , Nanjing Agricultural University , Nanjing , Jiangsu 210095 , People's Republic of China
| | - Wangang Zhang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education (MOE), Key Laboratory of Meat Processing, Ministry of Agriculture (MOA), Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control , Nanjing Agricultural University , Nanjing , Jiangsu 210095 , People's Republic of China
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Gonzalez-Martinez D, Johnston JR, Landim-Vieira M, Ma W, Antipova O, Awan O, Irving TC, Bryant Chase P, Pinto JR. Structural and functional impact of troponin C-mediated Ca 2+ sensitization on myofilament lattice spacing and cross-bridge mechanics in mouse cardiac muscle. J Mol Cell Cardiol 2018; 123:26-37. [PMID: 30138628 DOI: 10.1016/j.yjmcc.2018.08.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 07/26/2018] [Accepted: 08/05/2018] [Indexed: 12/25/2022]
Abstract
Acto-myosin cross-bridge kinetics are important for beat-to-beat regulation of cardiac contractility; however, physiological and pathophysiological mechanisms for regulation of contractile kinetics are incompletely understood. Here we explored whether thin filament-mediated Ca2+ sensitization influences cross-bridge kinetics in permeabilized, osmotically compressed cardiac muscle preparations. We used a murine model of hypertrophic cardiomyopathy (HCM) harboring a cardiac troponin C (cTnC) Ca2+-sensitizing mutation, Ala8Val in the regulatory N-domain. We also treated wild-type murine muscle with bepridil, a cTnC-targeting Ca2+ sensitizer. Our findings suggest that both methods of increasing myofilament Ca2+ sensitivity increase cross-bridge cycling rate measured by the rate of tension redevelopment (kTR); force per cross-bridge was also enhanced as measured by sinusoidal stiffness and I1,1/I1,0 ratio from X-ray diffraction. Computational modeling suggests that Ca2+ sensitization through this cTnC mutation or bepridil accelerates kTR primarily by promoting faster cross-bridge detachment. To elucidate if myofilament structural rearrangements are associated with changes in kTR, we used small angle X-ray diffraction to simultaneously measure myofilament lattice spacing and isometric force during steady-state Ca2+ activations. Within in vivo lattice dimensions, lattice spacing and steady-state isometric force increased significantly at submaximal activation. We conclude that the cTnC N-domain controls force by modulating both the number and rate of cycling cross-bridges, and that the both methods of Ca2+ sensitization may act through stabilization of cTnC's D-helix. Furthermore, we propose that the transient expansion of the myofilament lattice during Ca2+ activation may be an additional factor that could increase the rate of cross-bridge cycling in cardiac muscle. These findings may have implications for the pathophysiology of HCM.
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Affiliation(s)
- David Gonzalez-Martinez
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA
| | - Jamie R Johnston
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA
| | - Maicon Landim-Vieira
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA
| | - Weikang Ma
- Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL, USA
| | - Olga Antipova
- Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL, USA; X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Omar Awan
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA
| | - Thomas C Irving
- Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL, USA
| | - P Bryant Chase
- Department of Biological Science, Florida State University, Tallahassee, FL, USA
| | - J Renato Pinto
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA.
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Zhang Y, Lv Y, Chen L, Wu H, Zhang Y, Suo Z, Wang S, Liang Y, Xu X, Zhou G, Feng X. Inhibition of Epigallocatechin-3-gallate/Protein Interaction by Methyl-β-cyclodextrin in Myofibrillar Protein Emulsion Gels under Oxidative Stress. J Agric Food Chem 2018; 66:8094-8103. [PMID: 29976058 DOI: 10.1021/acs.jafc.8b00275] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nowadays, natural antioxidants abundant in polyphenols have been widely used to substitute synthetic antioxidants in meat products. In general, high doses of natural antioxidants are required to provide comparative antioxidant effects as synthetic antioxidants. Noticeably, the qualities of meat products can be jeopardized due to interactions between polyphenols and myofibrillar proteins (MPs). In this study, methyl-β-cyclodextrin was used to increase the polyphenol loading amount by preventing interactions between polyphenols and proteins. Solubility, electrophoresis, fluorescence spectroscopy, and surface hydrophobicity analyses indicated that methyl-β-cyclodextrin could dose-dependently inhibit epigallocatechin-3-gallate-induced attacks on MPs under oxidative stress. Gel strength, cooking loss, confocal laser scanning microscopy, dynamic rheological testing, and Raman spectrum during gelation were further analyzed to investigate the effects of methyl-β-cyclodextrin on the qualities of epigallocatechin-3-gallate-treated emulsion gel. Methyl-β-cyclodextrin addition prevented modification of the secondary structure of MPs caused by epigallocatechin-3-gallate. In consequence, the gel and emulsifying properties of MPs were significantly improved. Moreover, β-cyclodextrins could partly inhibit oxidative attacks on MPs and thus increase their solubility. These results indicated that methyl-β-cyclodextrin addition effectively enhanced epigallocatechin-3-gallate loading capacity in meat products.
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Affiliation(s)
- Yumeng Zhang
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
| | - Yuanqi Lv
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
| | - Lin Chen
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
| | - Haizhou Wu
- Department of Animal Sciences, Meat Science and Muscle Biology Laboratory , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Yingyang Zhang
- School of Food Science and Technology , Changzhou University , Changzhou , Jiangsu 213164 , China
| | - Zhiyao Suo
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
| | - Shuxin Wang
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
| | - Yuxin Liang
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
| | - Xinglian Xu
- Lab of Meat Processing and Quality Control of EDU, College of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition , Nanjing Agricultural University , Nanjing , Jiangsu 210095 , China
| | - Guanghong Zhou
- Lab of Meat Processing and Quality Control of EDU, College of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition , Nanjing Agricultural University , Nanjing , Jiangsu 210095 , China
| | - Xianchao Feng
- College of Food Science and Engineering , Northwest A&F University , No. 22 Xinong Road , Yangling , Shaanxi 712100 , China
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Cui Y, Hao Y, Li J, Gao Y, Gu X. Proteomic changes of the porcine skeletal muscle in response to chronic heat stress. J Sci Food Agric 2018; 98:3315-3323. [PMID: 29239490 DOI: 10.1002/jsfa.8835] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 12/05/2017] [Accepted: 12/10/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Heat stress (HS) has an adverse effect on meat quality; however, the underlying molecular mechanisms altering meat quality due to muscle responses to stress remain unclear. Sixteen castrated male crossbreeds between Landrace × Yorkshire sows and Duroc boars (79.00 ± 1.50 kg body weight) were exposed to either thermal neutral (22 °C, n = 8) or HS (30 °C, n = 8) conditions for 3 weeks. Subsequently, the longissimus dorsi (LD) muscle of all pigs was assayed for meat quality parameters and proteome analysis. RESULTS HS decreased post mortem (24 h) pH and intramuscular fat, changed ultimate L*, a* and b* values and increased drip loss and shear force. Proteome analysis of the LD was conducted by two-dimensional gel electrophoresis and mass spectrometry. A total of 23 differentially expressed proteins were identified, of which three were verified by western blotting analysis. The identified proteins were involved in six types of biological process: carbohydrate metabolism, myofibrillar and cytoskeleton structure, stress response, antioxidant and detoxification, calcium binding and cellular apoptosis. Interestingly, HS induced higher levels of heat shock protein, antioxidants and calcium binding proteins, which are involved in the mechanisms of defense and homeostasis. CONCLUSION The results indicate that HS-induced changes in the expression of myofibrillar proteins, glucose and energy metabolism-related proteins, heat shock protein and antioxidant enzymes might, at least partly, contribute to increase in meat tenderness. These findings will provide the foundation for developing future mitigating solutions and preventative therapies to reduce the detrimental effects of chronic HS on muscle function, metabolism and meat quality. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Yanjun Cui
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Institute of Animal Nutrition, College of Animal Science and Technology, Zhejiang A & F University, Lin'an, China
| | - Yue Hao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jielei Li
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanli Gao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xianhong Gu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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Arcanjo C, Armant O, Floriani M, Cavalie I, Camilleri V, Simon O, Orjollet D, Adam-Guillermin C, Gagnaire B. Tritiated water exposure disrupts myofibril structure and induces mis-regulation of eye opacity and DNA repair genes in zebrafish early life stages. Aquat Toxicol 2018; 200:114-126. [PMID: 29751158 DOI: 10.1016/j.aquatox.2018.04.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/16/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
Tritium (3H) is a radioactive isotope of hydrogen. In the environment, the most common form of tritium is tritiated water (HTO). The present study aimed to identify early biomarkers of HTO contamination through the use of an aquatic model, the zebrafish (Danio rerio). We used the zebrafish embryo-larvae model to investigate the modes of action of HTO exposure at dose rates of 0.4 and 4 mGy/h, dose rates expected to induce deleterious effects on fish. Zebrafish were exposed to HTO from 3 hpf (hours post fertilization) to 96 hpf. The transcriptomic effects were investigated 24 h and 96 h after the beginning of the contamination, using mRNAseq. Results suggested an impact of HTO contamination, regardless of the dose rate, on genes involved in muscle contraction (tnnt2d, tnni2a.4, slc6a1a or atp2a1l) and eye opacity (crygm2d9, crygmxl1, mipb or lim2.3) after 24 h of contamination. Interestingly, an opposite differential expression was highlighted in genes playing a role in muscle contraction and eye opacity in 24 hpf embryos when comparing dose rates, suggesting an onset of DNA protective mechanisms. The expression of h2afx and ddb2 involved in DNA repair was enhanced in response to HTO exposure. The entrainment of circadian clock and the response to H2O2 signalling pathways were enriched at 96 hpf at 0.4 mGy/h and in both stages after 4 mGy/h. Genes involved in ROS scavenging were differentially expressed only after 24 h of exposure for the lowest dose rate, suggesting the onset of early protective mechanisms against oxidative stress. Effects highlighted on muscle at the molecular scale were confirmed at a higher biological scale, as electron microscopy observations revealed sarcomere impairments in 96 hpf larvae for both dose rates. Together with other studies, the present work provides useful data to better understand modes of action of tritium on zebrafish embryos-larvae.
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Affiliation(s)
- Caroline Arcanjo
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France.
| | - Olivier Armant
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France
| | - Magali Floriani
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France
| | - Isabelle Cavalie
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France
| | - Virginie Camilleri
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France
| | - Olivier Simon
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France
| | - Daniel Orjollet
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LR2T, Cadarache, Saint-Paul-lez-Durance, France
| | - Christelle Adam-Guillermin
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France
| | - Béatrice Gagnaire
- Institut de Radioprotection et de SÛreté Nucléaire (IRSN), PSE-ENV/SRTE/LECO, Cadarache, Saint-Paul-lez-Durance, France.
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Du X, Sun Y, Pan D, Wang Y, Ou C, Cao J. Change of the structure and the digestibility of myofibrillar proteins in Nanjing dry-cured duck during processing. J Sci Food Agric 2018; 98:3140-3147. [PMID: 29215140 DOI: 10.1002/jsfa.8815] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 11/13/2017] [Accepted: 12/02/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND To investigate the change of bioavailability and structure of myofibrillar proteins during Nanjing dry-cured duck processing, carbonyl content, sulfhydryl (SH) group, disulfide (SS) group, sodium dodecyl sulfate polyacrylamide gel electrophoresis, surface hydrophobicity, secondary structures and in vitro digestibility were determined. RESULTS During processing, carbonyl content and surface hydrophobicity increased; SH turned into SS group; α-helix turned into β-sheet and random coil fractions. Protein degradation occurred during dry-curing and drying-ripening stages. The in vitro digestibility of pepsin and pancreatic proteases increased during the salt curing stage and decreased during the drying-ripening stage. CONCLUSION The increase of digestibility could be attributed to the mild oxidation, degradation and unfolding of proteins while the decrease of digestibility was related to the intensive oxidation and aggregation of proteins. Protein degradation was not a main factor of digestibility during the drying-ripening stage. Results demonstrated that the bioavailability loss of myofibrillar proteins in Nanjing dry-cured duck occurred during the stage of drying-ripening instead of curing. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Xiaojing Du
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Yangying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Ying Wang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Changrong Ou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Jinxuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
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Carrera M, Fidalgo LG, Saraiva JA, Aubourg SP. Effects of High-Pressure Treatment on the Muscle Proteome of Hake by Bottom-Up Proteomics. J Agric Food Chem 2018; 66:4559-4570. [PMID: 29660290 DOI: 10.1021/acs.jafc.8b00635] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A bottom-up proteomics approach was applied for the study of the effects of high-pressure (HP) treatment on the muscle proteome of fish. The performance of the approach was established for a previous HP treatment (150-450 MPa for 2 min) on frozen (up to 5 months at -10 °C) European hake ( Merluccius merluccius). Concerning possible protein biomarkers of quality changes, a significant degradation after applying a pressure ≥430 MPa could be observed for phosphoglycerate mutase-1, enolase, creatine kinase, fructose bisphosphate aldolase, triosephosphate isomerase, and nucleoside diphosphate kinase; contrary, electrophoretic bands assigned to tropomyosin, glyceraldehyde-3-phosphate dehydrogenase, and beta parvalbumin increased their intensity after applying a pressure ≥430 MPa. This repository of potential protein biomarkers may be very useful for further HP investigations related to fish quality.
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Affiliation(s)
- Mónica Carrera
- Spanish National Research Council (CSIC), Marine Research Institute (IIM) , Department of Food Technology , Vigo , Pontevedra Spain , 36208
| | - Liliana G Fidalgo
- Research Unit of Organic Chemistry, Natural, and Agro-food Products (QOPNA) and Chemistry Department , University of Aveiro , 3810-193 Aveiro , Portugal
| | - Jorge A Saraiva
- Research Unit of Organic Chemistry, Natural, and Agro-food Products (QOPNA) and Chemistry Department , University of Aveiro , 3810-193 Aveiro , Portugal
| | - Santiago P Aubourg
- Spanish National Research Council (CSIC), Marine Research Institute (IIM) , Department of Food Technology , Vigo , Pontevedra Spain , 36208
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Wang S, Zhang Y, Chen L, Xu X, Zhou G, Li Z, Feng X. Dose-dependent effects of rosmarinic acid on formation of oxidatively stressed myofibrillar protein emulsion gel at different NaCl concentrations. Food Chem 2018; 243:50-57. [PMID: 29146369 DOI: 10.1016/j.foodchem.2017.09.114] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/18/2017] [Accepted: 09/21/2017] [Indexed: 12/18/2022]
Abstract
The effects of rosmarinic acid (RA) (12, 60 and 300μM/g protein) on the textural properties and stability of oxidized myofibrillar protein (MP) emulsion gels were investigated. A low dose (12µM/g) of RA significantly prevented the loss of thiol and ε-NH2 groups and the unfolding of the oxidized MP. However, a high dose of RA (300µM/g) covalently and non-covalently interacted with the MPs, which induced a significant loss of thiol and ε-NH2 groups and aggregation of the MPs, causing decreased solubility, resulting in a poor three-dimensional emulsion gel network, and hence, higher cooking loss and lower gel strength. Moreover, the emulsifying properties of the MP emulsion gel were jeopardized by 300µM/g RA. A high concentration of NaCl (0.6M) enhanced the interaction between RA and MPs, increasing deterioration of the internal structure and leading to extremely unstable emulsifying properties of the MP emulsion gel.
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Affiliation(s)
- Shuangxi Wang
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Yumeng Zhang
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Lin Chen
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xinglian Xu
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Guanghong Zhou
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhixi Li
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China
| | - Xianchao Feng
- College of Food Science and Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi 712100, China.
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Ullah N, Wang X, Chen L, Xu X, Li Z, Feng X. Influence of biofilm surface layer protein A (BslA) on the gel structure of myofibril protein from chicken breast. J Sci Food Agric 2017; 97:4712-4720. [PMID: 28374425 DOI: 10.1002/jsfa.8339] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/11/2017] [Accepted: 03/27/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Different techniques have been applied to alter myofibril protein (MP) structure, which further promotes protein-protein interactions and influencing the MP gelling characteristics. Influence of BslA from natto food (protein concentration, 30 mg mL-1 ; at 0.001, 0.005, 0.01, 0.05 and 0.1 g kg-1 ) on the characteristics of MP gel of chicken breast was investigated. RESULTS Results show that cooking loss significantly (P < 0.05) decreased with increased percentage of BslA. Hardness of MP gel did not significantly change at 0.01 g kg-1 BslA. Differential scanning calorimetry disclosed that MP was modified by the addition of BslA. Moreover, BslA produced a high value of storage modulus (G') and low value of phase angle (tan δ) during heating, especially at 0.01 g kg-1 . Analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis proved the formation of higher-molecular-weight polymers by developing non-disulfide covalent bonds between MP at 0.01 g kg-1 BslA. Surface hydrophobicity of the MP gel was decreased with increased percentage of BslA. Scanning electron microscopy confirmed the increasing number of uniform cavities of MP gel with the increased percentage of BslA. CONCLUSION Addition of 0.01 g kg-1 BslA significantly improved the water holding capacity and rheological properties of MP by developing non-disulfide covalent bonds. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Niamat Ullah
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
- Department of Human Nutrition, The University Of Agriculture Peshawar, Khyber, Pakhtunkhwa, Pakistan
| | - Xuejiao Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Lin Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Xinglian Xu
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Zhixi Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Xianchao Feng
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
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Wang X, Xiong YL, Sato H. Rheological Enhancement of Pork Myofibrillar Protein-Lipid Emulsion Composite Gels via Glucose Oxidase Oxidation/Transglutaminase Cross-Linking Pathway. J Agric Food Chem 2017; 65:8451-8458. [PMID: 28876922 DOI: 10.1021/acs.jafc.7b03007] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Porcine myofibrillar protein (MP) was modified with glucose oxidase (GluOx)-iron that produces hydroxyl radicals then subjected to microbial transglutaminase (TGase) cross-linking in 0.6 M NaCl at 4 °C. The resulting aggregation and gel formation of MP were examined. The GluOx-mediated oxidation promoted the formation of both soluble and insoluble protein aggregates via disulfide bonds and occlusions of hydrophobic groups. The subsequent TGase treatment converted protein aggregates into highly cross-linked polymers. MP-lipid emulsion composite gels formed with such polymers exhibited markedly enhanced gelling capacity: up to 4.4-fold increases in gel firmness and 3.5-fold increases in gel elasticity over nontreated protein. Microstructural examination showed small oil droplets dispersed in a densely packed gel matrix when MP was oxidatively modified, and the TGase treatment further contributed to such packing. The enzymatic GluOx oxidation/TGase treatment shows promise to improve the textural properties of emulsified meat products.
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Affiliation(s)
- Xu Wang
- Department of Animal and Food Sciences, University of Kentucky , Lexington, Kentucky 40546, United States
| | - Youling L Xiong
- Department of Animal and Food Sciences, University of Kentucky , Lexington, Kentucky 40546, United States
| | - Hiroaki Sato
- Institute of Food Sciences and Technologies, Food Products Division, Ajinomoto Company, Inc. , Kawasaki 201-8681, Japan
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Abstract
The effects of pulsed ultrasound (PUS) (power: 240w) with varying time (0, 3, 6, 9, 12 and 15min) on rheological and structural properties of chicken myofibrillar protein (CMP) were examined. PUS treatment significantly caused a decrease in the viscosity coefficients (k) but an increase in the flow index (n) value of CMP solutions within short time (0-6min), while had no significant effect for longer time (9-15min). Besides, at 6min, the solubility and microstructure of CMP samples were optimum. The primary structure of CMP was not altered by PUS treatment. However, Raman spectroscopy revealed a decrease in the α-helix and β-sheets proportion and an increase in the β-turn of CMP following PUS treatment. Random coil reached a maximum at 6min. The changes in tertiary and quaternary structure of CMP by PUS treatment also occurred. As PUS time extended, S0-ANS for CMP increased measured by ANS fluorescence probe method. However, the normalized intensity of 760cm-1 increased from 0min to 6min, and then decreased to 15min by Raman test. Moreover, the reactive sulphur (SH) contents and disulfide bonds (S-S) of samples increased while the total SH contents decreased within 0-6min. At 9min and above, the contents of reactive SH groups were almost equal to the contents of total SH groups. Differential scanning calorimetry (DSC) of CMP showed that peak temperature (Td2) for myosin and peak temperature (Td3) for actin were both reduced in the first 6min, while Td3 was not observed from 9min following PUS treatment. Therefore, 6min was the optimum PUS time to obtain better CMP rheological and structural properties.
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Affiliation(s)
- Jing-Yu Wang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Yu-Ling Yang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
| | - Xiao-Zhi Tang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Wen-Xi Ni
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Lei Zhou
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
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Li Z, Li X, Gao X, Du M, Zhang D. Effect of inhibition of μ-calpain on the myofibril structure and myofibrillar protein degradation in postmortem ovine muscle. J Sci Food Agric 2017; 97:2122-2131. [PMID: 27581860 DOI: 10.1002/jsfa.8018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 08/23/2016] [Accepted: 08/27/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Tenderness is considered to be one of the most important attributes of meat quality. Myofibrillar protein degradation contributes to meat tenderization during postmortem ageing. In this process, calpain is the primary enzyme catalyzing the proteolysis. To further understand the action of calpain in meat tenderization, a μ-calpain inhibitor, MDL-28170, was used and its effects on sarcomere structure and myofibrillar protein degradation were determined. RESULTS The results of the present study showed that inhibition of μ-calpain significantly reduced muscle myofibrillar fragmentation compared to the group without μ-calpain inhibitor. Meanwhile, the sarcomere structure of the μ-calpain inhibited muscle was only slightly broken and largely remained integral 48 h postmortem. Myosin heavy chain, actin, desmin, troponin T and troponin I were identified to be substrates of μ-calpain by liquid chromatography-tandem mass spectrocopy and western blotting, and were detected with a higher degradation degree in the control group compared to the μ-calpain inhibition group. CONCLUSION Comparatively, myosin heavy chain and actin were found to be less sensitive to μ-calpain compared to desmin, troponin T and troponin I. These findings provide a better understanding of the contribution of μ-calpain to the myofibril structure and myofibrillar protein degradation of ovine muscle. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Zheng Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, PR China
| | - Xin Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, PR China
| | - Xing Gao
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, PR China
| | - Manting Du
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, PR China
| | - Dequan Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, PR China
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Wang L, Zhang M, Fang Z, Bhandari B. Gelation properties of myofibrillar protein under malondialdehyde-induced oxidative stress. J Sci Food Agric 2017; 97:50-57. [PMID: 26916602 DOI: 10.1002/jsfa.7680] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/15/2016] [Accepted: 02/16/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND The structure of myofibrillar protein (MP) can be readily altered by oxidation, leading to the unfolding of MP structure, which further promotes protein-protein interactions, and thus influences the MP gelling properties. The objective of the study was to investigate the effect of malondialdehyde-induced oxidative stress on the gelation properties of myofibrillar protein (MP). Structural changes of the oxidised MPs were evaluated by the contents of carbonyl and total sulfhydryls, surface hydrophobicity, SDS-PAGE and Fourier transform infrared spectroscopy. The oxidative stability of the MP gels as indicated by lipid hydroperoxide was also determined. RESULTS With the addition of an MDA concentration less than 10 mmol L-1 , the MP gels showed an improved elasticity, gel strength, water holding capacity, and oxidative stability. Nevertheless, higher MDA concentration (25-50 mmol L-1 ) significantly reduced the gel quality, probably due to the formation of excessive covalent bonds in the system. CONCLUSION Results suggested that protein aggregation occurred in the oxidised system. Myosin was involved in gel formation through non-disulfide covalent bond. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Lin Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 214122, Wuxi, Jiangsu, China
| | - Min Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, 214122, Wuxi, Jiangsu, China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, China
| | - Zhongxiang Fang
- School of Public Health, Curtin University, Bentley, Western Australia, WA 6102, Australia
| | - Bhesh Bhandari
- School of Agriculture and Food Sciences, University of Queensland, Brisbane, QLD, Australia
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Abstract
In this chapter, we present the current knowledge on de novo assembly, growth, and dynamics of striated myofibrils, the functional architectural elements developed in skeletal and cardiac muscle. The data were obtained in studies of myofibrils formed in cultures of mouse skeletal and quail myotubes, in the somites of living zebrafish embryos, and in mouse neonatal and quail embryonic cardiac cells. The comparative view obtained revealed that the assembly of striated myofibrils is a three-step process progressing from premyofibrils to nascent myofibrils to mature myofibrils. This process is specified by the addition of new structural proteins, the arrangement of myofibrillar components like actin and myosin filaments with their companions into so-called sarcomeres, and in their precise alignment. Accompanying the formation of mature myofibrils is a decrease in the dynamic behavior of the assembling proteins. Proteins are most dynamic in the premyofibrils during the early phase and least dynamic in mature myofibrils in the final stage of myofibrillogenesis. This is probably due to increased interactions between proteins during the maturation process. The dynamic properties of myofibrillar proteins provide a mechanism for the exchange of older proteins or a change in isoforms to take place without disassembling the structural integrity needed for myofibril function. An important aspect of myofibril assembly is the role of actin-nucleating proteins in the formation, maintenance, and sarcomeric arrangement of the myofibrillar actin filaments. This is a very active field of research. We also report on several actin mutations that result in human muscle diseases.
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Affiliation(s)
- Joseph W Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA.
| | - Jushuo Wang
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA
| | - Yingli Fan
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA
| | - Jennifer White
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA
| | - Lei Mi-Mi
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA
| | - Dipak K Dube
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA
| | - Jean M Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA
| | - David Pruyne
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, 766 Irving Avenue, Syracuse, NY, 13224, USA.
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Cao Y, True AD, Chen J, Xiong YL. Dual Role (Anti- and Pro-oxidant) of Gallic Acid in Mediating Myofibrillar Protein Gelation and Gel in Vitro Digestion. J Agric Food Chem 2016; 64:3054-61. [PMID: 27003685 DOI: 10.1021/acs.jafc.6b00314] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The dose-dependent effects of gallic acid (GA; at 0, 6, 30, and 150 μmol/g protein) on chemical changes and gelling properties of oxidatively stressed porcine myofibrillar protein (MP) and in vitro digestibility of the gels were investigated. The incorporation of GA suppressed lipid oxidation and protein carbonyl formation but promoted the loss of thiol and amine groups, destabilization of the tertiary structure, aggregation, and cross-linking. The gelling potential (storage modulus) of MP was increased by nearly 50% with 6 and 30 μmol/g of GA, corresponding to enhanced protein unfolding and aggregation and formation of disulfide-dominant covalent bonds. However, GA at 150 μmol/g induced macroscopic aggregations and insolubility of MP, resulting in poorly structured gels. Despite the oxidative changes, MP gels did not show reduced susceptibility to digestive enzymes in vitro.
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Affiliation(s)
- Yungang Cao
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, and School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Alma D True
- Department of Animal and Food Sciences, University of Kentucky , Lexington, Kentucky 40546, United States
| | - Jie Chen
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, and School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Youling L Xiong
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, and School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
- Department of Animal and Food Sciences, University of Kentucky , Lexington, Kentucky 40546, United States
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46
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Shen QW, Swartz DR, Wang Z, Liu Y, Gao Y, Zhang D. Different actions of salt and pyrophosphate on protein extraction from myofibrils reveal the mechanism controlling myosin dissociation. J Sci Food Agric 2016; 96:2033-2039. [PMID: 26085314 DOI: 10.1002/jsfa.7314] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/11/2015] [Accepted: 06/13/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Myosin is the major functional protein in muscle foods for water retention, protein binding/gelation and fat holding/emulsification. To maximize its functionality, myosin needs to be released from thick filaments. Understanding of the mechanism controlling myosin extraction will help improve quality traits of meat products. RESULTS The data obtained show that actomyosin binding is the rate-limiting constraint for myosin release in rigor condition. Magnesium pyrophosphate (MgPPi) increased myosin extraction by weakening actomyosin interaction and maximized myosin extraction at 0.4 mol L(-1) NaCl, which was not attained at 1.0 mol L(-1) NaCl in the absence of PPi. Interaction between myosin rod domains is another critical constraint for myosin extraction, which is, rather than PPi, salt dependent. Further, our data suggest that MyBP-C (myosin binding protein C) and M-line might not be of significance in the process of NaCl-induced myosin extraction, though further study was needed. CONCLUSION Our study provides new insight into the mechanism that controls myosin extraction from intact sarcomere, which could be applied to maximize myosin function and to improve meat quality in practice.
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Affiliation(s)
- Qingwu W Shen
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, China
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | | | - Zhenyu Wang
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | - Yue Liu
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | - Yuan Gao
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | - Dequan Zhang
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
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47
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Chen L, Li X, Ni N, Liu Y, Chen L, Wang Z, Shen QW, Zhang D. Phosphorylation of myofibrillar proteins in post-mortem ovine muscle with different tenderness. J Sci Food Agric 2016; 96:1474-83. [PMID: 25950868 DOI: 10.1002/jsfa.7244] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 02/13/2015] [Accepted: 04/28/2015] [Indexed: 05/23/2023]
Abstract
BACKGROUND Tenderness is one of the most important quality attributes especially for beef and lamb. As protein phosphorylation and dephosphorylation regulate glycolysis, muscle contraction and turnover of proteins within living cells, it may contribute to the conversion of muscle to meat. The changes of myofibrillar protein phosphorylation in post-mortem ovine muscle with different levels of tenderness were investigated in this study. RESULTS The protein phosphorylation level (P/T ratio) of the tender group increased from 0.5 to 12 h post mortem and then decreased. The P/T ratio of tough group increased during 24 h post mortem, increasing faster from 0.5 to 4 h post mortem than from 4 to 24 h post mortem.The global phosphorylation level of tough meat was significantly higher than tender meat at 4, 12 and 24 h post mortem (P < 0.05). Protein identification revealed that most of the phosphoproteins were proteins with sarcomeric function; the others were involved in glycometabolism, stress response, etc. The phosphorylation levels of myofibrillar proteins, e.g. myosin light chain 2 and actin, were significantly different among groups of different tenderness and at different post-mortem time points (P < 0.05). CONCLUSION Protein phosphorylation may influence meat rigor mortis through contractile machinery and glycolysis, which in turn affect meat tenderness.
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Affiliation(s)
- Lijuan Chen
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Xin Li
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Na Ni
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Yue Liu
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Li Chen
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Zhenyu Wang
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Qingwu W Shen
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
| | - Dequan Zhang
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, People's Republic of China
- Synergetic Innovation Center of Food Safety and Nutrition, Beijing 100193, People's Republic of China
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Anssari-Benam A, Barber AH, Bucchi A. Evaluation of bioprosthetic heart valve failure using a matrix-fibril shear stress transfer approach. J Mater Sci Mater Med 2016; 27:42. [PMID: 26715134 DOI: 10.1007/s10856-015-5657-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 12/20/2015] [Indexed: 06/05/2023]
Abstract
A matrix-fibril shear stress transfer approach is devised and developed in this paper to analyse the primary biomechanical factors which initiate the structural degeneration of the bioprosthetic heart valves (BHVs). Using this approach, the critical length of the collagen fibrils l c and the interface shear acting on the fibrils in both BHV and natural aortic valve (AV) tissues under physiological loading conditions are calculated and presented. It is shown that the required critical fibril length to provide effective reinforcement to the natural AV and the BHV tissue is l c = 25.36 µm and l c = 66.81 µm, respectively. Furthermore, the magnitude of the required shear force acting on fibril interface to break a cross-linked fibril in the BHV tissue is shown to be 38 µN, while the required interfacial force to break the bonds between the fibril and the surrounding extracellular matrix is 31 µN. Direct correlations are underpinned between these values and the ultimate failure strength and the failure mode of the BHV tissue compared with the natural AV, and are verified against the existing experimental data. The analyses presented in this paper explain the role of fibril interface shear and critical length in regulating the biomechanics of the structural failure of the BHVs, for the first time. This insight facilitates further understanding into the underlying causes of the structural degeneration of the BHVs in vivo.
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Affiliation(s)
- Afshin Anssari-Benam
- School of Engineering, University of Portsmouth, Anglesea Road, Portsmouth, PO1 3DJ, UK.
| | - Asa H Barber
- School of Engineering, University of Portsmouth, Anglesea Road, Portsmouth, PO1 3DJ, UK
| | - Andrea Bucchi
- School of Engineering, University of Portsmouth, Anglesea Road, Portsmouth, PO1 3DJ, UK
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49
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Feng X, Li C, Ullah N, Hackman RM, Chen L, Zhou G. Potential Biomarker of Myofibrillar Protein Oxidation in Raw and Cooked Ham: 3-Nitrotyrosine Formed by Nitrosation. J Agric Food Chem 2015; 63:10957-10964. [PMID: 26593775 DOI: 10.1021/acs.jafc.5b04107] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The stability of cured meat products is increased by the protection of its proteins from oxidation by sodium nitrite (NaNO2) during processing. This study investigated the effects of NaNO2 (0, 50, 100, 200, and 400 mg/kg) on the physiochemical and structural characteristics of myofibrillar protein (MP) in raw and cooked ham. The NaNO2 showed a dose-dependent antioxidant effect, by inhibiting carbonyl formation, dityrosine formation, and denaturation of MP, and a nitrosative effect, through the formation of 3-Nitrotyrosine (3-NT). The 3-NT content within MP of raw ham had distinct negative correlations with sulfhydryl content and surface hydrophobicity. The 3-NT content within MP of cooked ham had significantly negative correlations with carbonyl, sulfhydryl content and turbidity and had significantly positive correlations with disulfide content. These results indicated that 3-NT may be a potential marker for protein oxidation in raw and cooked cured meat products.
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Affiliation(s)
- Xianchao Feng
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
- National Center of Meat Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, China
| | - Chenyi Li
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
| | - Niamat Ullah
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
- Department of Human Nutrition, The University Of Agriculture Peshawar , Khyber Pakhtunkhwa 25000, Pakistan
| | - Robert M Hackman
- Department of Nutrition, University of California-Davis , One Shields Avenue, Davis, California 95616, United States
| | - Lin Chen
- College of Food Science and Engineering, Northwest A&F University , No. 28 Xinong Road, Yangling, Shaanxi 712100, China
| | - Guanghong Zhou
- National Center of Meat Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, China
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50
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Abstract
This study investigated the role of interfacial myofibrillar protein (MFP) in the oxidative stabilization of meat emulsions. Emulsions with 10% oil were prepared using either 2% (w/v) Tween 20 or 0.25, 0.5, and 1% (w/v) MFP and then subjected to hydroxyl radical oxidation at 4 °C for 0, 2, and 24 h. MFP was more readily oxidized (intrinsic fluorescence quenching, sulfur losses, and carbonyl formation) than oil [conjugated dienes and 2-thiobarbituric acid-reactive substances (TBARS)]. However, oxidized MFP in the continuous phase stimulated lipid oxidation after 24 h, sharply contrasting with interface-adsorbed MFP that inhibited TBARS formation nearly 90% (p < 0.05). Interfacial MFP from 2 h oxidized samples exhibited greater losses of fluorescence and more extensive polymerization of myosin (detected by sodium dodecyl sulfate-polyacrylamide gel electrophoresis) than MFP present in the continuous phase. Results indicated that, due to the physical localization, interface-adsorbed MFP in general and myosin in particular provided accentuated protection of emulsions against oxidation.
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Affiliation(s)
- Jiayi Yang
- Department of Animal and Food Sciences, University of Kentucky , Lexington, Kentucky 40546, United States
| | - Youling L Xiong
- Department of Animal and Food Sciences, University of Kentucky , Lexington, Kentucky 40546, United States
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