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Pomon B, Zhao Y, Lai AL, Lin T, Freed JH, Abbaspourrad A. Thermal Degradation of Thaumatin at Low pH and Its Prevention Using Alkyl Gallates. Food Hydrocoll 2023; 139:108544. [PMID: 37546699 PMCID: PMC10399911 DOI: 10.1016/j.foodhyd.2023.108544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Thaumatin, a potent sweet tasting protein extracted from the Katemfe Plant, is emerging as a natural alternative to synthetic non-nutritive sweeteners and flavor enhancer. As a food additive, its stability within the food matrix during thermal processing is of great interest to the food industry. When heated under neutral or basic conditions, thaumatin was found to lose its sweetness due to protein aggregation caused by sulfhydryl catalyzed disulfide bond interchange. At lower pH, while thaumatin was also found to lose sweetness after heating, it does so at a slower rate and shows more resistance to sweetness loss. SDS-PAGE indicated that thaumatin fragmented into multiple smaller pieces under heating in acidic pH. Using BEMPO-3, a lipophilic spin trap, we were able to detect the presence of a free-radical within the hydrophobic region of the protein during heating. Protein carbonyl content, a byproduct of protein oxidation, also increased upon heating, providing additional evidence for protein cleavage by a radical pathway. Hexyl gallate successfully inhibited the radical generation as well as protein carbonyl formation of thaumatin during heating.
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Affiliation(s)
- Benjamin Pomon
- Department of Food Science, College of Agriculture and Life sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853
| | - Yu Zhao
- Department of Food Science, College of Agriculture and Life sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853
| | - Alex L. Lai
- Department of Chemistry, College of Arts and Sciences, Cornell University, Ithaca, NY 14853
| | - Tiantian Lin
- Department of Food Science, College of Agriculture and Life sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853
| | - Jack H. Freed
- Department of Chemistry, College of Arts and Sciences, Cornell University, Ithaca, NY 14853
| | - Alireza Abbaspourrad
- Department of Food Science, College of Agriculture and Life sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853
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2
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Thomas PB, Kaluç N, Aybastıer Ö. SLX5 deletion confers tolerance to oxidative stress in Saccharomyces cerevisiae. FEMS Microbiol Lett 2022; 369:6671530. [PMID: 35981831 DOI: 10.1093/femsle/fnac077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 06/09/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Slx5, a subunit of a SUMO-targeted ubiquitin ligase (STUbL) in yeast, has been implicated in maintenance of genomic stability. SUMOylation is an important post-translational modification involved in the regulation of several important cellular processes and cellular response to various environmental stressors. Oxidative stress occurs when production of reactive oxygen species (ROS) exceeds the antioxidant defense capacity of the cell. Elevated ROS levels cause oxidative damage to important cellular macromolecules such as DNA, lipids and proteins, which is associated with several diseases. Herein, we investigated the role of Slx5 in oxidative stress tolerance in Saccharomyces cerevisiae. We show that deletion of SLX5 increases survival of yeast cells in response to H2O2-induced oxidative stress in a cell cycle independent manner. Accumulation of intracellular ROS as well as DNA and lipid damages were reduced; expressions of antioxidant defense mechanism related genes were increased in slx5Δ cells compared to wild type (WT) under oxidative stress. We also show that slx5Δ cells have increased intracellular ROS levels and oxidative damage to DNA and lipids compared to WT in the absence of oxidative stress. Thus, our data together suggest that an adaptive stress induced by SLX5 deletion increases tolerance to oxidative stress in slx5∆ cells.
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Affiliation(s)
- Pınar B Thomas
- Department of Medical Biology and Genetics, Faculty of Medicine, Maltepe University, Istanbul, Turkey
| | - Nur Kaluç
- Department of Medical Biology and Genetics, Faculty of Medicine, Maltepe University, Istanbul, Turkey
| | - Önder Aybastıer
- Department of Chemistry, Faculty of Science and Arts, University of Uludag, Bursa, Turkey
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3
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Tian C, Yang J, Liu C, Chen P, Zhang T, Men Y, Ma H, Sun Y, Ma Y. Engineering substrate specificity of HAD phosphatases and multienzyme systems development for the thermodynamic-driven manufacturing sugars. Nat Commun 2022; 13:3582. [PMID: 35739124 PMCID: PMC9226320 DOI: 10.1038/s41467-022-31371-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 06/15/2022] [Indexed: 11/09/2022] Open
Abstract
Naturally, haloacid dehalogenase superfamily phosphatases have been evolved with broad substrate promiscuity; however, strong specificity to a particular substrate is required for developing thermodynamically driven routes for manufacturing sugars. How to alter the intrinsic substrate promiscuity of phosphatases and fit the “one enzyme-one substrate” model remains a challenge. Herein, we report the structure-guided engineering of a phosphatase, and successfully provide variants with tailor-made preference for three widespread phosphorylated sugars, namely, glucose 6-phosphate, fructose 6-phosphate, and mannose 6-phosphate, while simultaneously enhancement in catalytic efficiency. A 12000-fold switch from unfavorite substrate to dedicated one is generated. Molecular dynamics simulations reveal the origin of improved activity and substrate specificity. Furthermore, we develop four coordinated multienzyme systems and accomplish the conversion of inexpensive sucrose and starch to fructose and mannose in excellent yield of 94–96%. This innovative sugar-biosynthesis strategy overcomes the reaction equilibrium of isomerization and provides the promise of high-yield manufacturing of other monosaccharides and polyols. Haloacid dehalogenase-like phosphatases are widespread across all domains of life and play a crucial role in the regulation of levels of sugar phosphate metabolites in cells. The authors report on the structure-guided engineering of phosphatases for dedicated substrate specificity for the conversion of sucrose and starch into fructose and mannose.
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Affiliation(s)
- Chaoyu Tian
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China
| | - Jiangang Yang
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China. .,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Cui Liu
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China
| | - Peng Chen
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China
| | - Tong Zhang
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China
| | - Yan Men
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China
| | - Hongwu Ma
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China. .,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Yuanxia Sun
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China. .,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Yanhe Ma
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.,National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China
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QI X, YIN M, QIAO Z, LI Z, YU Z, CHEN M, XIAO T, WANG X. Freezing and frozen storage of aquatic products: mechanism and regulation of protein oxidation. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.91822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Affiliation(s)
- Xinjuan QI
- Shanghai Ocean University, China; Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, China
| | | | - Zenghui QIAO
- Shanghai Ocean University, China; Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, China
| | | | - Zheng YU
- Shanghai Ocean University, China
| | - Min CHEN
- Shanghai Ocean University, China
| | | | - Xichang WANG
- Shanghai Ocean University, China; Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, China
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Domínguez R, Pateiro M, Munekata PES, Zhang W, Garcia-Oliveira P, Carpena M, Prieto MA, Bohrer B, Lorenzo JM. Protein Oxidation in Muscle Foods: A Comprehensive Review. Antioxidants (Basel) 2021; 11:60. [PMID: 35052564 PMCID: PMC8773412 DOI: 10.3390/antiox11010060] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/23/2021] [Accepted: 12/25/2021] [Indexed: 12/26/2022] Open
Abstract
Muscle foods and their products are a fundamental part of the human diet. The high protein content found in muscle foods, as well as the high content of essential amino acids, provides an appropriate composition to complete the nutritional requirements of humans. However, due to their special composition, they are susceptible to oxidative degradation. In this sense, proteins are highly susceptible to oxidative reactions. However, in contrast to lipid oxidation, which has been studied in depth for decades, protein oxidation of muscle foods has been investigated much less. Moreover, these reactions have an important influence on the quality of muscle foods, from physico-chemical, techno-functional, and nutritional perspectives. In this regard, the loss of essential nutrients, the impairment of texture, water-holding capacity, color and flavor, and the formation of toxic substances are some of the direct consequences of protein oxidation. The loss of quality for muscle foods results in consumer rejection and substantial levels of economic losses, and thus the control of oxidative processes is of vital importance for the food industry. Nonetheless, the complexity of the reactions involved in protein oxidation and the many different factors that influence these reactions make the mechanisms of protein oxidation difficult to fully understand. Therefore, the present manuscript reviews the fundamental mechanisms of protein oxidation, the most important oxidative reactions, the main factors that influence protein oxidation, and the currently available analytical methods to quantify compounds derived from protein oxidation reactions. Finally, the main effects of protein oxidation on the quality of muscle foods, both from physico-chemical and nutritional points of view, are also discussed.
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Affiliation(s)
- Rubén Domínguez
- Centro Tecnológico de la Carne de Galicia, Rúa Galicia Nº 4, Parque Tecnológico de Galicia, 32900 San Cibrao das Vinas, Spain; (R.D.); (M.P.); (P.E.S.M.)
| | - Mirian Pateiro
- Centro Tecnológico de la Carne de Galicia, Rúa Galicia Nº 4, Parque Tecnológico de Galicia, 32900 San Cibrao das Vinas, Spain; (R.D.); (M.P.); (P.E.S.M.)
| | - Paulo E. S. Munekata
- Centro Tecnológico de la Carne de Galicia, Rúa Galicia Nº 4, Parque Tecnológico de Galicia, 32900 San Cibrao das Vinas, Spain; (R.D.); (M.P.); (P.E.S.M.)
| | - Wangang Zhang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Paula Garcia-Oliveira
- Nutrition and Bromatology Group, Analytical and Food Chemistry Department, Faculty of Food Science and Technology, University of Vigo, 32004 Ourense, Spain; (P.G.-O.); (M.C.); (M.A.P.)
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Braganca, Portugal
| | - Maria Carpena
- Nutrition and Bromatology Group, Analytical and Food Chemistry Department, Faculty of Food Science and Technology, University of Vigo, 32004 Ourense, Spain; (P.G.-O.); (M.C.); (M.A.P.)
| | - Miguel A. Prieto
- Nutrition and Bromatology Group, Analytical and Food Chemistry Department, Faculty of Food Science and Technology, University of Vigo, 32004 Ourense, Spain; (P.G.-O.); (M.C.); (M.A.P.)
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Braganca, Portugal
| | - Benjamin Bohrer
- Department of Animal Sciences, The Ohio State University, Columbus, OH 43210, USA;
| | - José M. Lorenzo
- Centro Tecnológico de la Carne de Galicia, Rúa Galicia Nº 4, Parque Tecnológico de Galicia, 32900 San Cibrao das Vinas, Spain; (R.D.); (M.P.); (P.E.S.M.)
- Facultade de Ciencias, Área de Tecnoloxía dos Alimentos, Universidade de Vigo, 32004 Ourense, Spain
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6
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Abstract
Protein oxidation is a topic of indisputable scientific interest given the impact of oxidized proteins on food quality and safety. Carbonylation is regarded as one of the most notable post-translational modifications in proteins and yet, this reaction and its consequences are poorly understood. From a mechanistic perspective, primary protein carbonyls (i.e. α-aminoadipic and γ-glutamic semialdehydes) have been linked to radical-mediated oxidative stress, but recent studies emphasize the role alternative carbonylation pathways linked to the Maillard reaction. Secondary protein carbonyls are introduced in proteins via covalent linkage of lipid carbonyls (i.e. protein-bound malondialdehyde). The high reactivity of protein carbonyls in foods and other biological systems indicates the intricate chemistry of these species and urges further research to provide insight into these molecular mechanisms and pathways. In particular, protein carbonyls are involved in the formation of aberrant and dysfunctional protein aggregates, undergo further oxidation to yield carboxylic acids of biological relevance and establish interactions with other biomolecules such as oxidizing lipids and phytochemicals. From a methodological perspective, the routine dinitrophenylhydrazine (DNPH) method is criticized not only for the lack of accuracy and consistency but also authors typically perform a poor interpretation of DNPH results, which leads to misleading conclusions. From a practical perspective, the biological relevance of protein carbonyls in the field of food science and nutrition is still a topic of debate. Though the implication of carbonylation on impaired protein functionality and poor protein digestibility is generally recognized, the underlying mechanism of such connections requires further clarification. From a medical perspective, protein carbonyls are highlighted as markers of protein oxidation, oxidative stress and disease. Yet, the specific role of specific protein carbonyls in the onset of particular biological impairments needs further investigations. Recent studies indicates that regardless of the origin (in vivo or dietary) protein carbonyls may act as signalling molecules which activate not only the endogenous antioxidant defences but also implicate the immune system. The present paper concisely reviews the most recent advances in this topic to identify, when applicable, potential fields of interest for future studies.
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Bansal R, Jha SK, Jha NK. Size-based Degradation of Therapeutic Proteins - Mechanisms, Modelling and Control. Biomol Concepts 2021; 12:68-84. [PMID: 34146465 DOI: 10.1515/bmc-2021-0008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/07/2021] [Indexed: 02/02/2023] Open
Abstract
Protein therapeutics are in great demand due to their effectiveness towards hard-to-treat diseases. Despite their high demand, these bio-therapeutics are very susceptible to degradation via aggregation, fragmentation, oxidation, and reduction, all of which are very likely to affect the quality and efficacy of the product. Mechanisms and modelling of these degradation (aggregation and fragmentation) pathways is critical for gaining a deeper understanding of stability of these products. This review aims to provide a summary of major developments that have occurred towards unravelling the mechanisms of size-based protein degradation (particularly aggregation and fragmentation), modelling of these size-based degradation pathways, and their control. Major caveats that remain in our understanding and control of size-based protein degradation have also been presented and discussed.
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Affiliation(s)
- Rohit Bansal
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Greater Noida, Uttar Pradesh, India
| | - Saurabh Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Greater Noida, Uttar Pradesh, India
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Greater Noida, Uttar Pradesh, India
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Song Q, Liu J, Dong L, Wang X, Zhang X. Novel advances in inhibiting advanced glycation end product formation using natural compounds. Biomed Pharmacother 2021; 140:111750. [PMID: 34051615 DOI: 10.1016/j.biopha.2021.111750] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/13/2021] [Accepted: 05/17/2021] [Indexed: 12/16/2022] Open
Abstract
Advanced glycation end products (AGEs) are a group of complex compounds generated by nonenzymatic interactions between proteins and reducing sugars or lipids. AGEs accumulate in vivo and activate various signaling pathways closely related to the occurrence of various chronic metabolic diseases. In this paper, we describe the process through which AGEs are formed, the classification of AGEs, and biological effects of AGEs on human health. Most importantly, we review recent progress in natural compound-based AGE formation inhibitors. Major classes of natural inhibitors, including polyphenols, polysaccharides, terpenoids, vitamins and alkaloids, have been described. Their mechanisms of action have been summarized as scavenging free radicals, chelating metal ions, capturing active carbonyl compounds, protecting protein glycation sites, and lowering blood glucose levels. Although these natural compounds have good antiglycation activity, to date, they are not widely used in the clinic, likely because of their low content levels. However, these natural compounds and their molecular frameworks will play a valuable role in inspiring drug discovery.
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Affiliation(s)
- Qinghe Song
- Endocrine and Metabolic Diseases Hospital of Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877, Jingshi Rd., Jinan 250001, China
| | - Junjun Liu
- Endocrine and Metabolic Diseases Hospital of Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877, Jingshi Rd., Jinan 250001, China
| | - Liyuan Dong
- Endocrine and Metabolic Diseases Hospital of Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877, Jingshi Rd., Jinan 250001, China
| | - Xiaolei Wang
- Endocrine and Metabolic Diseases Hospital of Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877, Jingshi Rd., Jinan 250001, China.
| | - Xiandang Zhang
- Shandong First Medical University & Shandong Academy of Medical Sciences, 6699, Qingdao Rd., Jinan 250118, China.
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Tian C, Yang J, Li Y, Zhang T, Li J, Ren C, Men Y, Chen P, You C, Sun Y, Ma Y. Artificially designed routes for the conversion of starch to value-added mannosyl compounds through coupling in vitro and in vivo metabolic engineering strategies. Metab Eng 2020; 61:215-224. [PMID: 32623008 DOI: 10.1016/j.ymben.2020.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 06/09/2020] [Accepted: 06/21/2020] [Indexed: 02/08/2023]
Abstract
Starch/cellulose has become the major feedstock for manufacturing biofuels and biochemicals because of their abundance and sustainability. In this study, we presented an artificially designed "starch-mannose-fermentation" biotransformation process through coupling the advantages of in vivo and in vitro metabolic engineering strategies together. Starch was initially converted into mannose via an in vitro metabolic engineering biosystem, and then mannose was fermented by engineered microorganisms for biomanufacturing valuable mannosyl compounds. The in vitro metabolic engineering biosystem based on phosphorylation/dephosphorylation reactions was thermodynamically favorable and the conversion rate reached 81%. The mannose production using whole-cell biocatalysts reached 75.4 g/L in a 30-L reactor, indicating the potential industrial application. Furthermore, the produced mannose in the reactor was directly served as feedstock for the fermentation process to bottom-up produced 19.2 g/L mannosyl-oligosaccharides (MOS) and 7.2 g/L mannosylglycerate (MG) using recombinant Corynebacterium glutamicum strains. Notably, such a mannose fermentation process facilitated the synthesis of MOS, which has not been achieved under glucose fermentation and improved MG production by 2.6-fold than that using the same C-mole of glucose. This approach also allowed access to produce other kinds of mannosyl derivatives from starch.
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Affiliation(s)
- Chaoyu Tian
- University of Chinese Academy of Sciences, Beijing, 100049, China; National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Jiangang Yang
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.
| | - Yunjie Li
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Tong Zhang
- University of Chinese Academy of Sciences, Beijing, 100049, China; National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Jiao Li
- University of Chinese Academy of Sciences, Beijing, 100049, China; National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Chenxi Ren
- University of Chinese Academy of Sciences, Beijing, 100049, China; National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Yan Men
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Peng Chen
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Chun You
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.
| | - Yuanxia Sun
- University of Chinese Academy of Sciences, Beijing, 100049, China; National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.
| | - Yanhe Ma
- National Engineering Laboratory for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
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Kaewput W, Thongprayoon C, Rangsin R, Jindarat S, Narindrarangkura P, Bathini T, Mao MA, Cheungpasitporn W. The Association between Serum Uric Acid and Peripheral Neuropathy in Patients with Type 2 Diabetes Mellitus: A Multicenter Nationwide CrossSectional Study. Korean J Fam Med 2020; 41:189-194. [PMID: 32456387 PMCID: PMC7272369 DOI: 10.4082/kjfm.18.0205] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 04/02/2019] [Indexed: 12/22/2022] Open
Abstract
Background The role of uric acid in the development of diabetic peripheral neuropathy remains unclear. This study aimed to determine the association between uric acid and peripheral neuropathy among type 2 diabetes mellitus (T2DM) patients. Methods We conducted a nationwide cross-sectional study based on the diabetes and hypertension study of the Medical Research Network of the Consortium of Thai Medical Schools. Adult T2DM patients from 831 public hospitals in Thailand were evaluated. The serum uric acid level was categorized into five groups based on quintiles (<4.4, 4.4–5.3, 5.3–6.2, 6.2–7.3, and >7.3 mg/dL). A multivariate logistic regression model was used to assess the independent association between serum uric acid level and peripheral neuropathy. Results In total, 7,511 T2DM patients with available data about serum uric acid levels were included in the analysis. The mean age of the participants was 61.7±10.9 years, and approximately 35.6% were men. The prevalence rate of peripheral neuropathy was 3.0%. Moreover, the prevalence rates of peripheral neuropathy stratified according to uric acid levels <4.4, 4.4–5.3, 5.3–6.2, 6.2–7.3, and >7.3 mg/dL were 2.5%, 2.8%, 2.4%, 2.5%, and 4.7%, respectively. A serum uric acid level ≥7.3 mg/dL was found to be associated with an increase in odds ratio (1.54; 95% confidence interval, 1.02–2.32) for peripheral neuropathy compared with a serum uric acid level <4.4 mg/dL. Conclusion Serum uric acid level is independently associated with peripheral neuropathy in T2DM patients, and elevated serum uric acid levels should be considered a risk factor for diabetic peripheral neuropathy in clinical practice.
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Affiliation(s)
- Wisit Kaewput
- Department of Military and Community Medicine, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Charat Thongprayoon
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Ram Rangsin
- Department of Military and Community Medicine, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Sarawut Jindarat
- Department of Pharmacology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | | | - Tarun Bathini
- Department of Internal Medicine, University of Arizona, Tucson, AZ, USA
| | - Michael A Mao
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Wisit Cheungpasitporn
- Division of Nephrology, Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
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11
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Wang W, Yang J, Sun Y, Li Z, You C. Artificial ATP-Free in Vitro Synthetic Enzymatic Biosystems Facilitate Aldolase-Mediated C–C Bond Formation for Biomanufacturing. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04696] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jiangang Yang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Yuanxia Sun
- University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Zhimin Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China
| | - Chun You
- University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West Seventh Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
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12
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Pradhan A, Bagchi A, De S, Mitra S, Mukherjee S, Ghosh P, Ghosh A, Chatterjee M. Role of redox imbalance and cytokines in mediating oxidative damage and disease progression of patients with rheumatoid arthritis. Free Radic Res 2019; 53:768-779. [DOI: 10.1080/10715762.2019.1629586] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ayan Pradhan
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Aniruddha Bagchi
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Soumita De
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Sneha Mitra
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Shibabrata Mukherjee
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Parasar Ghosh
- Department of Rheumatology and Clinical Immunology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Alakendu Ghosh
- Department of Rheumatology and Clinical Immunology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Mitali Chatterjee
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
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13
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Enkavi G, Javanainen M, Kulig W, Róg T, Vattulainen I. Multiscale Simulations of Biological Membranes: The Challenge To Understand Biological Phenomena in a Living Substance. Chem Rev 2019; 119:5607-5774. [PMID: 30859819 PMCID: PMC6727218 DOI: 10.1021/acs.chemrev.8b00538] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
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Biological
membranes are tricky to investigate. They are complex
in terms of molecular composition and structure, functional
over a wide range of time scales, and characterized
by nonequilibrium conditions. Because of all of these
features, simulations are a great technique to study biomembrane
behavior. A significant part of the functional processes
in biological membranes takes place at the molecular
level; thus computer simulations are the method of
choice to explore how their properties emerge from specific
molecular features and how the interplay among the numerous
molecules gives rise to function over spatial and
time scales larger than the molecular ones. In this
review, we focus on this broad theme. We discuss the current
state-of-the-art of biomembrane simulations that, until
now, have largely focused on a rather narrow picture
of the complexity of the membranes. Given this, we
also discuss the challenges that we should unravel in the
foreseeable future. Numerous features such as the actin-cytoskeleton
network, the glycocalyx network, and nonequilibrium
transport under ATP-driven conditions have so far
received very little attention; however, the potential
of simulations to solve them would be exceptionally high. A
major milestone for this research would be that one day
we could say that computer simulations genuinely research
biological membranes, not just lipid bilayers.
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Affiliation(s)
- Giray Enkavi
- Department of Physics , University of Helsinki , P.O. Box 64, FI-00014 Helsinki , Finland
| | - Matti Javanainen
- Department of Physics , University of Helsinki , P.O. Box 64, FI-00014 Helsinki , Finland.,Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo naḿesti 542/2 , 16610 Prague , Czech Republic.,Computational Physics Laboratory , Tampere University , P.O. Box 692, FI-33014 Tampere , Finland
| | - Waldemar Kulig
- Department of Physics , University of Helsinki , P.O. Box 64, FI-00014 Helsinki , Finland
| | - Tomasz Róg
- Department of Physics , University of Helsinki , P.O. Box 64, FI-00014 Helsinki , Finland.,Computational Physics Laboratory , Tampere University , P.O. Box 692, FI-33014 Tampere , Finland
| | - Ilpo Vattulainen
- Department of Physics , University of Helsinki , P.O. Box 64, FI-00014 Helsinki , Finland.,Computational Physics Laboratory , Tampere University , P.O. Box 692, FI-33014 Tampere , Finland.,MEMPHYS-Center for Biomembrane Physics
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14
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Dong L, Wu Y, Wang W, Wu Y, Zhang Y, Wang S. Structural modification and digestibility change of β-lactoglobulin modified by methylglyoxal with the simulated reheating of dairy products. Food Chem 2019; 288:276-282. [PMID: 30902293 DOI: 10.1016/j.foodchem.2019.03.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 03/05/2019] [Accepted: 03/07/2019] [Indexed: 01/13/2023]
Abstract
A methylglyoxal (MG)-β-lactoglobulin (bLG) model was established to simulate reheating conditions (60-100 °C) to investigate the modification effect that α-dicarbonyl compounds had on protein structure and on the digestibility of milk protein. The results showed that bLG can be modified by MG, and the modification degree increased with the increase in reheating temperature. The reacted lysine and arginine as well as the generated protein-bound NƐ-carboxymethyllysine and NƐ-carboxyethyllysine in the modified bLG also increased with temperature. The high-resolution mass spectrometry results revealed that the modification site is at the lysine and arginine residue of bLG. Additionally, nine types of modifications were detected, and NƐ-carboxyethyllysine was the dominant modification product. The in vitro digestibility of MG-modified bLG clearly decreased with the increase in reheating temperature. This result was consistent with the degree of structural modification and could be explained by the specific action sites (lysine and arginine) of the digestive enzyme, which were modified by MG.
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Affiliation(s)
- Lu Dong
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Yuekun Wu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Wenxiang Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Yajing Wu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Yan Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China.
| | - Shuo Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China.
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15
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Jiao Y, Quan W, He Z, Gao D, Qin F, Zeng M, Chen J. Effects of Catechins on N ε-(Carboxymethyl)lysine and N ε-(Carboxyethyl)lysine Formation in Green Tea and Model Systems. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:1254-1260. [PMID: 30620573 DOI: 10.1021/acs.jafc.8b05146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The effects of catechins on Nε-(carboxymethyl)lysine (CML) and Nε-(carboxyethyl)lysine (CEL) formation in green tea and related model systems were investigated in this study. Since the first step of green tea processing entails enzyme inactivation, the catechin content was maintained at a high level during processing. However, drying still had a great effect on CML and CEL formation, while other steps also contributed. Hence, model systems were developed to analyze the effects of catechins on CML and CEL formation. Catechins ((-)-epicatechin gallate, (-)-epigallocatechin, and (-)-epigallocatechin gallate) could inhibit CML formation in the model imitating the condition of green tea processing, though the inhibitory efficiency was reduced by transition metals. This suggested that catechins could inhibit CML formation in the real tea system, though the inhibitory efficiency may be reduced by tea components which promote its synthesis. However, CEL formation was not always inhibited by the tested catechins, though catechins could significantly decrease the content of methylglyoxal which is considered an important intermediate. Consequently, the main pathway of CEL formation may not be through methylglyoxal.
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Affiliation(s)
- Ye Jiao
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
| | - Wei Quan
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
| | - Zhiyong He
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
| | - Daming Gao
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
| | - Fang Qin
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
| | - Maomao Zeng
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
| | - Jie Chen
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , 214122 , China
- International Joint Laboratory on Food Safety , Jiangnan University , Wuxi , 214122 , China
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16
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Cheng K, Zheng W, Chen H, Zhang YHPJ. Upgrade of wood sugar d-xylose to a value-added nutraceutical by in vitro metabolic engineering. Metab Eng 2018; 52:1-8. [PMID: 30389613 DOI: 10.1016/j.ymben.2018.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 10/09/2018] [Accepted: 10/27/2018] [Indexed: 11/30/2022]
Abstract
The upgrade of D-xylose, the most abundant pentose, to value-added biochemicals is economically important to next-generation biorefineries. myo-Inositol, as vitamin B8, has a six-carbon carbon-carbon ring. Here we designed an in vitro artificial NAD(P)-free 12-enzyme pathway that can effectively convert the five-carbon xylose to inositol involving xylose phosphorylation, carbon-carbon (C-C) rearrangement, C-C bond circulation, and dephosphorylation. The reaction conditions catalyzed by all thermostable enzymes from hyperthermophilic microorganisms Thermus thermophiles, Thermotoga maritima, and Archaeoglobus fulgidus were optimized in reaction temperature, buffer type and concentration, enzyme composition, Mg2+ concentration, and fed-batch addition of ATP. The 11-enzyme cocktail, whereas a fructose 1,6-bisphosphatase from T. maritima has another function of inositol monophosphatase, converted 20 mM xylose to 16.1 mM inositol with a conversion efficiency of 96.6% at 70 °C. Polyphosphate was found to replace ATP for xylulose phosphorylation due to broad substrate promiscuity of the T. maritima xylulokinase. The Tris-HCl buffer effectively mitigated the Maillard reaction at 70 °C or higher temperature. The co-production of value-added biochemicals, such as inositol, from wood sugar could greatly improve economics of new biorefineries, similar to oil refineries that make value-added plastic precursors to subsidize gasoline/diesel production.
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Affiliation(s)
- Kun Cheng
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, 95 Wenhua Road, Zhengzhou 450002, China; Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin Airport Economic Area, Tianjin 300308, China
| | - Wenming Zheng
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, 95 Wenhua Road, Zhengzhou 450002, China; College of Life Sciences, Henan Agricultural University, 95 Wenhua Road, Zhengzhou 450002, China
| | - Hongge Chen
- Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, 95 Wenhua Road, Zhengzhou 450002, China; College of Life Sciences, Henan Agricultural University, 95 Wenhua Road, Zhengzhou 450002, China.
| | - Yi-Heng P Job Zhang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin Airport Economic Area, Tianjin 300308, China.
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17
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Wang W, Roberts CJ. Protein aggregation – Mechanisms, detection, and control. Int J Pharm 2018; 550:251-268. [DOI: 10.1016/j.ijpharm.2018.08.043] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 12/19/2022]
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18
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Arcanjo NMO, Luna C, Madruga MS, Estévez M. Antioxidant and pro-oxidant actions of resveratrol on human serum albumin in the presence of toxic diabetes metabolites: Glyoxal and methyl-glyoxal. Biochim Biophys Acta Gen Subj 2018; 1862:1938-1947. [PMID: 29902553 DOI: 10.1016/j.bbagen.2018.06.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/08/2018] [Accepted: 06/08/2018] [Indexed: 12/23/2022]
Abstract
Methylglyoxal (MGO) and glyoxal (GO) are attracting considerable attention because of their role in the onset of diabetes symptoms. Therefore, to comprehend the molecular fundamentals of their pathological actions is of the utmost importance. In this study, the molecular interactions between resveratrol (RES) and human serum albumin (HSA) and the ability of the stilbene to counteract the oxidative damage caused by pathological concentrations of MGO and GO to the human plasma protein, was assessed. The oxidation of Cys34 in HSA as well as the formation of specific protein semialdehydes AAS (α-aminoadipic), GGS (γ-glutamic) and the accumulation of Advanced Glycation End-products (AGEs) was investigated. Resveratrol was found to neutralize both α-dicarbonyls by forming adducts detected by HESI-Orbitrap-MS. This antioxidant action was manifested in a significant reduction of AGEs. However, RES-α-dicarbonyl conjugates oxidized Cys34 and lysine, arginine and/or proline by a nucleophilic attack on SH and ε-NH groups in HSA. The formation of specific semialdehydes in HSA after incubation with GO and MGO at pathological concentrations was reported for the first time in this study, and may be used as early and specific biomarkers of the oxidative stress undergone by diabetic patients. The pro-oxidative role of the RES-α-dicarbonyl conjugates should be further investigated to clarify whether this action leads to positive or harmful clinical consequences. The biological relevance of human protein carbonylation as a redox signaling mechanism and/or as a reflection of oxidative damage and disease should also be studied in future works.
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Affiliation(s)
- N M O Arcanjo
- Department of Food Engineering, Federal University of Paraiba, Joao Pessoa CEP 58051-900, PB, Brazil
| | - C Luna
- Servicio Extremeño de Salud, SES, Gobierno de Extremadura, Cáceres, Spain
| | - M S Madruga
- Department of Food Engineering, Federal University of Paraiba, Joao Pessoa CEP 58051-900, PB, Brazil
| | - M Estévez
- IPROCAR Research Institute, Food Technology, University of Extremadura, 10003 Cáceres. Spain.
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19
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Manning MC, Liu J, Li T, Holcomb RE. Rational Design of Liquid Formulations of Proteins. THERAPEUTIC PROTEINS AND PEPTIDES 2018; 112:1-59. [DOI: 10.1016/bs.apcsb.2018.01.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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20
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Abstract
Diabetes is a chronic systemic disease that affects nearly one in eight adults worldwide. Ocular complications, such as cataract, can lead to significant visual impairment. Among the worldwide population, cataract is the leading cause of blindness, and patients with diabetes have an increased incidence of cataracts which mature earlier compared to the rest of the population. Cataract surgery is a common and safe procedure, but can be associated with vision-threatening complications in the diabetic population, such as diabetic macular edema, postoperative macular edema, diabetic retinopathy progression, and posterior capsular opacification. This article is a brief review of diabetic cataract and complications associated with cataract extraction in this population of patients.
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Affiliation(s)
- Scott R Peterson
- a Joslin Diabetes Center , Beetham Eye Institute , Boston , MA , USA.,b Department of Ophthalmology , Harvard Medical School , Boston , MA , USA
| | - Paolo A Silva
- a Joslin Diabetes Center , Beetham Eye Institute , Boston , MA , USA.,b Department of Ophthalmology , Harvard Medical School , Boston , MA , USA
| | - Timothy J Murtha
- a Joslin Diabetes Center , Beetham Eye Institute , Boston , MA , USA.,b Department of Ophthalmology , Harvard Medical School , Boston , MA , USA
| | - Jennifer K Sun
- a Joslin Diabetes Center , Beetham Eye Institute , Boston , MA , USA.,b Department of Ophthalmology , Harvard Medical School , Boston , MA , USA
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21
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Zhang C, Xiao Y, Ma Y, Li B, Liu Z, Lu C, Liu X, Wei Y, Zhu Z, Zhang Y. Algae biomass as a precursor for synthesis of nitrogen-and sulfur-co-doped carbon dots: A better probe in Arabidopsis guard cells and root tissues. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 174:315-322. [DOI: 10.1016/j.jphotobiol.2017.06.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 06/06/2017] [Accepted: 06/21/2017] [Indexed: 01/20/2023]
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22
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Oxidative damage to food and human serum proteins: Radical-mediated oxidation vs. glyco-oxidation. Food Chem 2017; 267:111-118. [PMID: 29934144 DOI: 10.1016/j.foodchem.2017.06.154] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/21/2017] [Accepted: 06/29/2017] [Indexed: 11/22/2022]
Abstract
This study compared a hydroxyl radical-generating system (HRGS) (0.05-0.2mM Fe3++0.6mM H2O2) and a glycation system (GLY) (0.05-0.2mM Fe3++0.05M glucose) for their ability to promote protein carbonylation and tryptophan depletion in myofibrillar proteins, ovalbumin, β-lactoglobulin, soy protein and human serum albumin. Animal-source were more susceptible to protein carbonylation than soy proteins and globular were more susceptible than fibrillar proteins. Both systems promoted tryptophan loss and the formation of protein carbonyls and iron had a clear dose-effect in most systems and proteins. In the tested conditions, the GLY environment was more effective than the HRGS system in promoting the oxidative damage to food proteins. According to the results, glucose and H2O2 may compete for iron for the production of glycosylative and oxidative species, respectively. This study provides original insight into the chemical mechanisms implicated in the oxidative and glycosylative damage to food proteins.
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23
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Milkovska-Stamenova S, Mnatsakanyan R, Hoffmann R. Protein carbonylation sites in bovine raw milk and processed milk products. Food Chem 2017; 229:417-424. [PMID: 28372194 DOI: 10.1016/j.foodchem.2017.02.102] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 02/20/2017] [Accepted: 02/20/2017] [Indexed: 12/23/2022]
Abstract
During thermal treatment of milk, proteins are oxidized, which may reduce the nutritional value of milk, abolish protein functions supporting human health, especially important for newborns, and yield potentially harmful products. The side chains of several amino acids can be oxidized to reactive carbonyls, which are often used to monitor oxidative stress in organisms. Here we mapped protein carbonylation sites in raw milk and different brands of pasteurized, ultra high temperature (UHT) treated milk, and infant formulas (IFs) after digesting the precipitated proteins with trypsin. Reactive carbonyls were derivatized with O-(biotinylcarbazoylmethyl)hydroxylamine to enrich the modified peptides by avidin-biotin affinity chromatography and analyze them by nanoRP-UPLC-ESI-MS. Overall, 53 unique carbonylated peptides (37 carbonylation sites, 15 proteins) were identified. Most carbonyls were derived from dicarbonyls (mainly glyoxal). The number of carbonylation sites increased with the harsher processing from raw milk (4) to pasteurized (16) and UHT milk (16) and to IF (24).
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Affiliation(s)
- Sanja Milkovska-Stamenova
- Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Universität Leipzig, Leipzig, Germany; Center for Biotechnology and Biomedicine, Universität Leipzig, Leipzig, Germany
| | - Ruzanna Mnatsakanyan
- Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Universität Leipzig, Leipzig, Germany; Center for Biotechnology and Biomedicine, Universität Leipzig, Leipzig, Germany
| | - Ralf Hoffmann
- Institute of Bioanalytical Chemistry, Faculty of Chemistry and Mineralogy, Universität Leipzig, Leipzig, Germany; Center for Biotechnology and Biomedicine, Universität Leipzig, Leipzig, Germany.
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24
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Li W, Li Z, Han X, Huang D, Lu Y, Yang X. Enhancing the hepatic protective effect of genistein by oral administration with stachyose in mice with chronic high fructose diet consumption. Food Funct 2016; 7:2420-30. [PMID: 27157892 DOI: 10.1039/c6fo00038j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Dietary supplementation of soy stachyose or genistein is known to be of hepatoprotective health interest. This study showed that co-administration of genistein and stachyose caused stronger inhibition on abnormal weight gain and liver fat accumulation by decreasing fatty acid synthetase expression and balancing disorderly lipid metabolism than that of genistein or stachyose alone in high-fructose (HF) diet-fed mice. Furthermore, the production of malonaldehyde and carbonyl derivatives of proteins was also more effectively inhibited by co-treatment of genistein and stachyose, and thereby glutathione peroxidase and superoxide dismutase activities were elevated in HF-fed mice. Moreover, genistein in combination with stachyose was more effective to reduce the impact of HF on the serum markers of liver damage by inhibiting inflammatory cytokine release than stachyose or genistein alone in mice. The potential mechanism was that stachyose enhanced absorption of genistein in HF-fed mice by oral supplementation of genistein together with stachyose. These findings indicate that co-ingestion of stachyose and genistein may serve as a novel strategy for hepatic protection.
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Affiliation(s)
- Wenfeng Li
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.
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25
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Fructose-Induced Carbonyl/Oxidative Stress in S. cerevisiae: Involvement of TOR. Biochem Res Int 2016; 2016:8917270. [PMID: 27019749 PMCID: PMC4785243 DOI: 10.1155/2016/8917270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 01/26/2016] [Indexed: 12/19/2022] Open
Abstract
The TOR (target of rapamycin) signaling pathway first described in the budding yeast Saccharomyces cerevisiae is highly conserved in eukaryotes effector of cell growth, longevity, and stress response. TOR activation by nitrogen sources, in particular amino acids, is well studied; however its interplay with carbohydrates and carbonyl stress is poorly investigated. Fructose is a more potent glycoxidation agent capable of producing greater amounts of reactive carbonyl (RCS) and oxygen species (ROS) than glucose. The increased RCS/ROS production, as a result of glycoxidation in vivo, is supposed to be involved in carbonyl/oxidative stress, metabolic disorders, and lifespan shortening of eukaryotes. In this work we aim to expand our understanding of how TOR is involved in carbonyl/oxidative stress caused by reducing monosaccharides. It was found that in fructose-grown compared with glucose-grown cells the level of carbonyl/oxidative stress markers was higher. The defects in the TOR pathway inhibited metabolic rate and suppressed generation of glycoxidation products in fructose-grown yeast.
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26
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Peng X, Liu Y, Bentley WE, Payne GF. Electrochemical Fabrication of Functional Gelatin-Based Bioelectronic Interface. Biomacromolecules 2016; 17:558-63. [DOI: 10.1021/acs.biomac.5b01491] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xianghong Peng
- Institute
for Bioscience and Biotechnology Research, University of Maryland, College
Park, Maryland 20742, United States
- Key
Laboratory of Optoelectronic Chemical Materials and Devices, Ministry
of Education, Jianghan University, Wuhan 430056, People’s Republic of China
| | - Yi Liu
- Institute
for Bioscience and Biotechnology Research, University of Maryland, College
Park, Maryland 20742, United States
| | - William E. Bentley
- Institute
for Bioscience and Biotechnology Research, University of Maryland, College
Park, Maryland 20742, United States
- Fischell
Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Gregory F. Payne
- Institute
for Bioscience and Biotechnology Research, University of Maryland, College
Park, Maryland 20742, United States
- Fischell
Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
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