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Hatada M, Pavlidis S, Sode K. Development of a glycated albumin sensor employing dual aptamer-based extended gate field effect transistors. Biosens Bioelectron 2024; 251:116118. [PMID: 38382273 DOI: 10.1016/j.bios.2024.116118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/05/2024] [Accepted: 02/07/2024] [Indexed: 02/23/2024]
Abstract
Glycated albumin (GA), defined as the percentage of serum albumin glycation, is a mid-term glycemic control marker for diabetes. The concentrations of both glycated human serum albumin (GHSA) and total human serum albumin (HSA) are required to calculate GA. Here, we report the development of a GA sensor employing two albumin aptamers: anti-GHSA aptamer which is specific to GHSA and anti-HSA aptamer which recognizes both glycated and non-glycated HSA. We combine these aptamers with extended gate field effect transistors (EGFETs) to realize GA monitoring without the need to pretreat serum samples, and therefore suitable for point of care and home-testing applications. Using anti-GHSA aptamer-immobilized electrodes and EGFETs, we measured GHSA concentrations between 0.1-10 μM within 20 min. The sensor was able to measure GHSA concentration in the presence of BSA for a range of known GA levels (5-29%). With anti-HSA aptamer-immobilized electrodes and EGFETs, we measured total HSA concentrations from 1-17 μM. Furthermore, GHSA and total HSA concentrations of both healthy and diabetic-level samples were determined with GHSA and HSA sensors. The measured GHSA and total HSA concentrations in three samples were used to determine respective GA percentages, and our calculations agreed with GA levels determined by reference methods. Thus, we developed simple and rapid dual aptamer-based EGFET sensors to monitor GA through measuring GHSA and total HSA concentration, without the need for sample pretreatment, a mandatory step in the current standard of enzymatic GA monitoring.
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Affiliation(s)
- Mika Hatada
- Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, 27599, USA
| | - Spyridon Pavlidis
- Department of Electrical & Computer Engineering, North Carolina State University, Raleigh, NC, 27606, USA
| | - Koji Sode
- Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, 27599, USA.
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2
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Tesvichian S, Sangtanoo P, Srimongkol P, Saisavoey T, Buakeaw A, Puthong S, Thitiprasert S, Mekboonsonglarp W, Liangsakul J, Sopon A, Prawatborisut M, Reamtong O, Karnchanatat A. Sulfated polysaccharides from Caulerpa lentillifera: Optimizing the process of extraction, structural characteristics, antioxidant capabilities, and anti-glycation properties. Heliyon 2024; 10:e24444. [PMID: 38293411 PMCID: PMC10826829 DOI: 10.1016/j.heliyon.2024.e24444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 12/24/2023] [Accepted: 01/09/2024] [Indexed: 02/01/2024] Open
Abstract
The polysaccharides found in Caulerpa lentillifera (sea grape algae) are potentially an important bioactive resource. This study makes use of RSM (response surface methodology) to determine the optimal conditions for the extraction of valuable SGP (sea grape polysaccharides). The findings indicated that a water/raw material ratio of 10:1 mL/g, temperature of 90 °C, and extraction time of 45 min would maximize the yield, with experimentation achieving a yield of 21.576 %. After undergoing purification through DEAE-52 cellulose and Sephacryl S-100 column chromatography, three distinct fractions were obtained, namely SGP11, SGP21, and SGP31, each possessing average molecular weights of 38.24 kDa, 30.13 kDa, and 30.65 kDa, respectively. Following characterization, the fractions were shown to comprise glucose, galacturonic acid, xylose, and mannose, while the sulfate content was in the range of 12.2-21.8 %. Using Fourier transform infrared spectroscopy (FT-IR) it was possible to confirm with absolute certainty the sulfate polysaccharide attributes of SGP11, SGP21, and SGP31. NMR (nuclear magnetic resonance) findings made it clear that SGP11 exhibited α-glycosidic configurations, while the configurations of SGP21 and SGP31 were instead β-glycosidic. The in vitro antioxidant assays which were conducted revealed that each of the fractions was able to demonstrate detectable scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical cations. All fractions were also found to exhibit the capacity to scavenge NO radicals in a dose-dependent manner. SGP11, SGP21, and SGP31 were also able to display cellular antioxidant activity (CAA) against the human adenocarcinoma colon (Caco-2) cell line when oxidative damage was induced. The concentration levels were found to govern the extent of such activity. Moreover, purified SGP were found to exert strong inhibitory effects upon glycation, with the responses dependent upon dosage, thus confirming the potential for SGP to find a role as a natural resource for the production of polysaccharide-based antioxidant drugs, or products to promote improved health.
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Affiliation(s)
- Suphaporn Tesvichian
- Program in Biotechnology, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Papassara Sangtanoo
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Piroonporn Srimongkol
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Tanatorn Saisavoey
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Anumart Buakeaw
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Songchan Puthong
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Sitanan Thitiprasert
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Wanwimon Mekboonsonglarp
- Scientific and Technological Research Equipment Centre, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Jatupol Liangsakul
- Scientific and Technological Research Equipment Centre, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Anek Sopon
- Aquatic Resources Research Institute, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
| | - Mongkhol Prawatborisut
- Bruker Switzerland AG, 175, South Sathorn Road, 10th Floor, Sathorn City Tower, Thungmahamek, Sathorn, Bangkok, 10120, Thailand
| | - Onrapak Reamtong
- Department of Molecular Tropical Medicine and Genetics, Mahidol University, 420/6 Ratchawithi Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Aphichart Karnchanatat
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
- Center of Excellence in Bioconversion and Bioseparation for Platform Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Wangmai, Pathumwan, Bangkok, 10330, Thailand
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3
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Mossine VV, Mawhinney TP. 1-Amino-1-deoxy-d-fructose ("fructosamine") and its derivatives: An update. Adv Carbohydr Chem Biochem 2023; 83:1-26. [PMID: 37968036 DOI: 10.1016/bs.accb.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
1-Amino-1-deoxy-d-fructose (fructosamine, FN) derivatives are omnipresent in all living organisms, as a result of non-enzymatic condensation and Amadori rearrangement reactions between free glucose and biogenic amines such as amino acids, polypeptides, or aminophospholipids. Over decades, steady interest in fructosamine was largely sustained by its role as a key intermediate structure in the Maillard reaction that is responsible for the organoleptic and nutritional value of thermally processed foods, and for pathophysiological effects of hyperglycemia in diabetes. New trends in fructosamine research include the discovery and engineering of FN-processing enzymes, development of advanced tools for hyperglycemia monitoring, and evaluation of the therapeutic potential of both fructosamines and FN-recognizing proteins. This article covers developments in the field of fructosamine and its derivatives since 2010 and attempts to ascertain challenges in future research.
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Affiliation(s)
- Valeri V Mossine
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Thomas P Mawhinney
- Department of Biochemistry, University of Missouri, Columbia, MO, United States.
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4
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Mossine VV, Mawhinney TP. 1-Amino-1-deoxy-d-fructose ("fructosamine") and its derivatives. Adv Carbohydr Chem Biochem 2023; 83:27-132. [PMID: 37968038 DOI: 10.1016/bs.accb.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Fructosamine has long been considered as a key intermediate of the Maillard reaction, which to a large extent is responsible for specific aroma, taste, and color formation in thermally processed or dehydrated foods. Since the 1980s, however, as a product of the Amadori rearrangement reaction between glucose and biologically significant amines such as proteins, fructosamine has experienced a boom in biomedical research, mainly due to its relevance to pathologies in diabetes and aging. In this chapter, we assess the scope of the knowledge on and applications of fructosamine-related molecules in chemistry, food, and health sciences, as reflected mostly in publications within the past decade. Methods of fructosamine synthesis and analysis, its chemical, and biological properties, and degradation reactions, together with fructosamine-modifying and -recognizing proteins are surveyed.
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Affiliation(s)
- Valeri V Mossine
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Thomas P Mawhinney
- Department of Biochemistry, University of Missouri, Columbia, MO, United States.
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Allicin Alleviates Diabetes Mellitus by Inhibiting the Formation of Advanced Glycation End Products. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248793. [PMID: 36557926 PMCID: PMC9787121 DOI: 10.3390/molecules27248793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/14/2022]
Abstract
Advanced glycation end products (AGEs) cause damage to pancreatic β-cells and trigger oxidative stress and inflammation, which promotes the development and progression of diabetes and its complications. Therefore, it is important to inhibit the formation of AGEs as part of the treatment of diabetes. Allicin is a natural antimicrobial agent with abundant pharmacological activities, and recent studies have reported its therapeutic effects in diabetes; however, the mechanism of these therapeutic effects is still unclear. Thus, the purpose of this study was to further investigate the association between allicin treatment of diabetes and AGEs. First, we established a streptozocin (STZ)-induced diabetic rat model and treated the rats with allicin for six weeks. We measured glycolipid metabolism, AGE levels, receptor of advanced glycation end products (RAGE) levels, oxidative stress, and other related indicators. The results showed that allicin improved blood glucose and body weight, reduced lipid accumulation, and inhibited AGE formation in rats. Treatment with allicin also inhibited RAGEs and thereby prevented AGE activity, which, in turn, alleviated oxidative stress and promoted insulin secretion. To further verify the effect of allicin on AGEs, we also performed in vitro nonenzymatic glycation simulation experiments. These results showed that allicin inhibited the production of AGEs by suppressing the production of AGEs intermediates. Thus, our research suggests that allicin may alleviate diabetes by inhibiting the formation of AGEs and reducing RAGE levels to relieve oxidative stress and promote insulin secretion.
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6
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Park JJ, Olawuyi IF, Lee WY. Effect of combined
UV
‐thermosonication and
Ecklonia cava
extract on advanced glycation end‐products in soymilk. J FOOD PROCESS ENG 2022. [DOI: 10.1111/jfpe.14208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jong Jin Park
- School of Food Science and Technology Kyungpook National University Daegu South Korea
- Coastal Agricultural Research Institute, Kyungpook National University Daegu South Korea
| | | | - Won Young Lee
- School of Food Science and Technology Kyungpook National University Daegu South Korea
- Research Institute of Tailored Food Technology, Kyungpook National University Daegu South Korea
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7
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Inhibitory effects of polyphenols from black chokeberry on advanced glycation end-products (AGEs) formation. Food Chem 2022; 392:133295. [PMID: 35636190 DOI: 10.1016/j.foodchem.2022.133295] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 04/25/2022] [Accepted: 05/21/2022] [Indexed: 11/20/2022]
Abstract
Plant-based polyphenols are known to exert mitigating effects on the harmful consequences of advanced glycation. In this study, the antioxidant and antiglycation properties of purified black chokeberry polyphenol and its dominant monomers were studied. The phenolics of black chokeberry had a significant inhibitory effect on glycation products at all stages. The highest inhibition of fructosamine (72.27%) was achieved by chlorogenic acid (CA). Epigallocatechin gallate (EGCG) showed an 84.47% inhibition of α-dicarbonyl and 54.44% inhibition of AGEs (advanced glycation end-products). However, the inhibition of α-dicarbonyl was impacted by the presence of Cu2+. In addition, an EGCG-induced increase in the protein α-helical structure to 21.43% was observed. Overall, EGCG was the main component inhibited protein glycosylation in the simulated glycation system. Furthermore, the mechanism of inhibition was a combination of scavenging free radicals, capturing metal ions, and alleviating changes in the secondary structure of proteins.
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8
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Omeprazole inhibits α-glucosidase activity and the formation of nonenzymatic glycation products: Activity and mechanism. J Biosci Bioeng 2021; 133:110-118. [PMID: 34802943 DOI: 10.1016/j.jbiosc.2021.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/30/2021] [Accepted: 10/20/2021] [Indexed: 11/22/2022]
Abstract
In this study, the inhibitory effect and mechanism of omeprazole on α-glucosidase and nonenzymatic glycation were investigated in vitro by using multi-spectroscopic methods and molecular docking. Enzyme kinetic results showed that omeprazole inhibited α-glucosidase in a reversible and noncompetitive manner (IC50= 0.595 ± 0.003 mM). The results from fluorescence quenching and thermomechanical analyses signified that omeprazole reduced the fluorescence intensity of α-glucosidase by forming an omeprazole-α-glucosidase complex primarily driven by hydrogen bonds. Molecular docking further confirmed that hydrogen bonds and hydrophobic forces were the major driving forces for omeprazole binding to α-glucosidase. The nonenzymatic glycation assays revealed that omeprazole had a moderate inhibition against the formation of fructosamine, dicarbonyl compounds, and advanced glycation end products (AGEs). This study provides a new inhibitor of both α-glucosidase and nonenzymatic glycation and provides a practicable candidate for treating diabetes and its complications.
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Kehm R, Baldensperger T, Raupbach J, Höhn A. Protein oxidation - Formation mechanisms, detection and relevance as biomarkers in human diseases. Redox Biol 2021; 42:101901. [PMID: 33744200 PMCID: PMC8113053 DOI: 10.1016/j.redox.2021.101901] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/06/2021] [Accepted: 02/12/2021] [Indexed: 12/16/2022] Open
Abstract
Generation of reactive oxygen species and related oxidants is an inevitable consequence of life. Proteins are major targets for oxidation reactions, because of their rapid reaction rates with oxidants and their high abundance in cells, extracellular tissues, and body fluids. Additionally, oxidative stress is able to degrade lipids and carbohydrates to highly reactive intermediates, which eventually attack proteins at various functional sites. Consequently, a wide variety of distinct posttranslational protein modifications is formed by protein oxidation, glycoxidation, and lipoxidation. Reversible modifications are relevant in physiological processes and constitute signaling mechanisms ("redox signaling"), while non-reversible modifications may contribute to pathological situations and several diseases. A rising number of publications provide evidence for their involvement in the onset and progression of diseases as well as aging processes. Certain protein oxidation products are chemically stable and formed in large quantity, which makes them promising candidates to become biomarkers of oxidative damage. Moreover, progress in the development of detection and quantification methods facilitates analysis time and effort and contributes to their future applicability in clinical routine. The present review outlines the most important classes and selected examples of oxidative protein modifications, elucidates the chemistry beyond their formation and discusses available methods for detection and analysis. Furthermore, the relevance and potential of protein modifications as biomarkers in the context of disease and aging is summarized.
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Affiliation(s)
- Richard Kehm
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany.
| | - Tim Baldensperger
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany.
| | - Jana Raupbach
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany.
| | - Annika Höhn
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558, Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764, Muenchen-Neuherberg, Germany.
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10
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Park JJ, Lee WY. Anti-glycation effect of Ecklonia cava polysaccharides extracted by combined ultrasound and enzyme-assisted extraction. Int J Biol Macromol 2021; 180:684-691. [PMID: 33766590 DOI: 10.1016/j.ijbiomac.2021.03.118] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/17/2021] [Accepted: 03/21/2021] [Indexed: 11/16/2022]
Abstract
The anti-glycation effects of polysaccharides from Ecklonia cava were examined according to extraction method-hot buffer (HP), ultrasound (UP), enzyme (EP), or a combination of ultrasound and enzyme (UEP). The physicochemical properties, monosaccharide compositions, and structural characteristics of the polysaccharides were determined. UP, EP, and UEP had higher fucose and galactose compositions than HP. The FT-IR spectra of samples showed the presence of sulfate esters and 4-sulfate galactose. 1H NMR indicated that alginate was removed by purification. UP, EP, and UEP possessed higher sulfate contents than HP. UEP presented with the highest extraction yield and lowest protein and uronic acid contents. The levels of AGE formation, as well as fructosamine, α-dicarbonyl, and protein carbonyl contents were determined during a 3-week incubation in a BSA/fructose system. UEP and UP effectively inhibited AGE, although the inhibition effect was lower than that of aminoguanidine. However, UP and UEP showed higher inhibition of fructosamine, α-dicarbonyl, and protein carbonyl than aminoguanidine. AGE formation was negatively correlated with sulfate content and some monosaccharide compositions (fucose, galactose, and glucose), but positively correlated with molecular weight. Overall, the present study suggests that UEP is a suitable extraction method for obtaining anti-glycation agents from E. cava.
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Affiliation(s)
- Jong Jin Park
- School of Food Science and Technology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Won Young Lee
- School of Food Science and Technology, Kyungpook National University, Daegu 41566, Republic of Korea.
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11
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Spinach Methanolic Extract Attenuates the Retinal Degeneration in Diabetic Rats. Antioxidants (Basel) 2021; 10:antiox10050717. [PMID: 34063668 PMCID: PMC8147642 DOI: 10.3390/antiox10050717] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 01/02/2023] Open
Abstract
It has been suggested that spinach methanolic extract (SME) inhibits the formation of advanced glycation end products (AGEs), which are increased during diabetes progression, so it is important to know if SME has beneficial effects in the diabetic retina. In this study, in vitro assays showed that SME inhibits glycation, carbonyl groups formation, and reduced-thiol groups depletion in bovine serum albumin incubated either reducing sugars or methylglyoxal. The SME effect in retinas of streptozotocin-induced diabetic rats (STZ) was also studied (n = 10) in the normoglycemic group, STZ, STZ rats treated with SME, and STZ rats treated with aminoguanidine (anti-AGEs reference group) during 12 weeks. The retina was sectioned and immunostained for Nε-carboxymethyl lysine (CML), receptor RAGE, NADPH-Nox4, inducible nitric oxide synthase (iNOS), 3-nitrotyrosine (NT), nuclear NF-κB, vascular endothelial growth factor (VEGF), glial fibrillary acidic protein (GFAP), S100B protein, and TUNEL assay. Lipid peroxidation was determined in the whole retina by malondialdehyde (MDA) levels. The results showed that in the diabetic retina, SME reduced the CML-RAGE co-localization, oxidative stress (NOX4, iNOS, NT, MDA), inflammation (NF-κB, VEGF, S100B, GFAP), and apoptosis (p < 0.05). Therefore, SME could attenuate the retinal degeneration by inhibition of CML-RAGE interaction.
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13
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Study on the active polyphenol constituents in differently colored Rubus Chingii Hu and the structure-activity relationship of the main ellagitannins and ellagic acid. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108967] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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14
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Awasthi S, Preethy R, Saraswathi N. Nordihydroguaiaretic acid prevents glycation induced structural alterations and aggregation of albumin. Int J Biol Macromol 2019; 122:479-484. [DOI: 10.1016/j.ijbiomac.2018.10.173] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 10/19/2018] [Accepted: 10/25/2018] [Indexed: 12/20/2022]
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15
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Identification and inhibitory activities of ellagic acid- and kaempferol-derivatives from Mongolian oak cups against α-glucosidase, α-amylase and protein glycation linked to type II diabetes and its complications and their influence on HepG2 cells’ viability. ARAB J CHEM 2018. [DOI: 10.1016/j.arabjc.2017.10.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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16
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Zeng L, Ding H, Hu X, Zhang G, Gong D. Galangin inhibits α-glucosidase activity and formation of non-enzymatic glycation products. Food Chem 2018; 271:70-79. [PMID: 30236734 DOI: 10.1016/j.foodchem.2018.07.148] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 11/18/2022]
Abstract
Inhibition of α-glucosidase and non-enzymatic glycation is considered as an effective approach to treat type 2 diabetes. Herein, multispectroscopic techniques and molecular docking analysis were used to investigate the inhibition of galangin on α-glucosidase and non-enzymatic glycation. Galangin showed a reversible inhibition on α-glucosidase activity in a mixed-type manner through a monophasic kinetic process, and induced the fluorescence quenching and conformational changes of α-glucosidase by forming α-glucosidase-galgangin complex. Molecular docking revealed that galangin primarily interacted with the amino acid residues within the active site of α-glucosidase, which may prevent the entrance of substrate resulting in a decrease in catalytic efficiency of α-glucosidase. Moreover, galangin moderately inhibited the formation of intermediates of non-enzymatic glycation, fructosamine and α-dicarbonyl compounds and strongly inhibited the formation of advanced glycation end products.
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Affiliation(s)
- Li Zeng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Huafang Ding
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Xing Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Guowen Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
| | - Deming Gong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; New Zealand Institute of Natural Medicine Research, 8 Ha Crescent, Auckland 2104, New Zealand
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17
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Chen G, Madl RL, Smith JS. Cereal bran extracts inhibit the formation of advanced glycation endproducts in a bovine serum albumin/glucose model. Cereal Chem 2018. [DOI: 10.1002/cche.10070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Gengjun Chen
- Department of Grain Science & Industry; Kansas State University; Manhattan Kansas
| | - Ronald L. Madl
- Department of Grain Science & Industry; Kansas State University; Manhattan Kansas
| | - J. Scott Smith
- Food Science Institute; Kansas State University; Manhattan Kansas
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18
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Effects of polysaccharides from Inonotus obliquus and its chromium (III) complex on advanced glycation end-products formation, α-amylase, α-glucosidase activity and H2O2-induced oxidative damage in hepatic L02 cells. Food Chem Toxicol 2018; 116:335-345. [DOI: 10.1016/j.fct.2018.04.047] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/12/2018] [Accepted: 04/20/2018] [Indexed: 12/17/2022]
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Quality properties and formation of α-dicarbonyl compounds in abalone muscle (Haliotis discus) as affected by tenderization and baking processes. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2018. [DOI: 10.1007/s11694-018-9765-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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20
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Glycolytic enzyme inhibitory and antiglycation potential of rutin. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2017. [DOI: 10.1016/j.fjps.2017.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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21
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Khan MA, Arif Z, Moinuddin, Alam K. Characterization of methylglyoxal-modified human IgG by physicochemical methods. J Biomol Struct Dyn 2017; 36:3172-3183. [DOI: 10.1080/07391102.2017.1383309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Mohd. Adnan Khan
- Department of Biochemistry, Faculty of Medicine, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Zarina Arif
- Department of Biochemistry, Faculty of Medicine, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Moinuddin
- Department of Biochemistry, Faculty of Medicine, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Khursheed Alam
- Department of Biochemistry, Faculty of Medicine, Aligarh Muslim University, Aligarh, UP 202002, India
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Neelofar K, Ahmad J. An overview of in vitro and in vivo glycation of albumin: a potential disease marker in diabetes mellitus. Glycoconj J 2017; 34:575-584. [PMID: 28812216 DOI: 10.1007/s10719-017-9789-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 06/27/2017] [Accepted: 07/26/2017] [Indexed: 02/08/2023]
Abstract
Non-enzymatic glycation of macromolecules, especially proteins leading to their oxidation is increased in diabetes mellitus due to hyperglycaemia and play an important role in associated complications of the disease. Protein glycation mostly occurs in intra chain lysine residues resulting in the formation of early stage Amadori products which are finally converted to advance glycation end products (AGEs). This review deals with the structural studies of in vitro and in vivo glycated human serum albumin (HSA). The aim of this review is to explain the disturbance in secondary and tertiary structure of albumin upon glucosylation and the immunogenic potential of modified albumin. Amadori-albumin may have enough potential to provoke the immunoregulatry cells and generate autoantibodies in diabetic patients. Role of Amadori-albumin in the induction of autoantibodies in type2 diabetes especially in chronic kidney disease (CKD) patients has been discussed. This review also considers various studies that investigate the effects of glycation on the structural and immunological properties of HSA. The use of glycated albumin (GA) as a short to intermediate term marker for glycaemic control in diabetes is also focused.
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Affiliation(s)
- Km Neelofar
- Rajiv Gandhi Centre for Diabetes and Endocrinology, Faculty of Medicine, J.N. Medical College, Aligarh Muslim University, Aligarh, 202002, India
| | - Jamal Ahmad
- Rajiv Gandhi Centre for Diabetes and Endocrinology, Faculty of Medicine, J.N. Medical College, Aligarh Muslim University, Aligarh, 202002, India.
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Calvano CD, Cataldi TRI, Kögel JF, Monopoli A, Palmisano F, Sundermeyer J. Structural Characterization of Neutral Saccharides by Negative Ion MALDI Mass Spectrometry Using a Superbasic Proton Sponge as Deprotonating Matrix. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:1666-1675. [PMID: 28466430 DOI: 10.1007/s13361-017-1679-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/22/2017] [Accepted: 03/29/2017] [Indexed: 05/22/2023]
Abstract
The superbasic proton sponge 1,8-bis(tripyrrolidinylphosphazenyl)naphthalene (TPPN) has been successfully employed for the structural characterization of neutral saccharides, cyclodextrins, and saccharide alditols by matrix assisted laser desorption/ionization tandem mass spectrometry (MALDI-MS/MS). Owing to its inherently high basicity, TPPN is capable of deprotonating neutral carbohydrates (M) providing an efficient and simple way to produce gas-phase [M - H]- ions. Highly informative negative ions MS/MS spectra showing several diagnostic fragment ions were obtained, mainly A-type cross-ring and C-type glycosidic cleavages. Indeed, cross-ring cleavages of monosaccharides with formation of 0,2A, 0,3A, 2,4A, 2,5A, 3,5A, and 0,3X product ions dominate the MS/MS spectra. A significant difference between reducing (e.g., lactose, maltose) and non-reducing disaccharides (e.g., sucrose, trehalose) was observed. Though disaccharides with the anomeric positions blocked give rise to deprotonated molecules, [M - H]-, at m/z 341.1, reducing ones exhibited a peak at m/z 340.1, most likely as radical anion, [M - H•- H]-•. The superiority of TPPN was clearly demonstrated by comparison with well recognized matrices, such as 2,5-dihydroxybenzoic acid and 2',4',6'-trihydroxyacetophenone (positive ion mode) and nor-harman (negative ion mode). MALDI MS/MS experiments on isotopically labeled sugars have greatly supported the interpretation of plausible fragmentation pathways. Graphical Abstract ᅟ.
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Affiliation(s)
- Cosima Damiana Calvano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy.
- Centro di Ricerca Interdipartimentale SMART, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy.
| | - Tommaso R I Cataldi
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy
- Centro di Ricerca Interdipartimentale SMART, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy
| | - Julius F Kögel
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032, Marburg, Germany
- FB Biologie/Chemie, Universität Bremen, Leobener Str. im NW2, 28359, Bremen, Germany
| | - Antonio Monopoli
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy
| | - Francesco Palmisano
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy
- Centro di Ricerca Interdipartimentale SMART, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70126, Bari, Italy
| | - Jorge Sundermeyer
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032, Marburg, Germany
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Gupta RK, Gupta K, Sharma A, Das M, Ansari IA, Dwivedi PD. Maillard reaction in food allergy: Pros and cons. Crit Rev Food Sci Nutr 2017; 58:208-226. [PMID: 26980434 DOI: 10.1080/10408398.2016.1152949] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Food allergens have a notable potential to induce various health concerns in susceptible individuals. The majority of allergenic foods are usually subjected to thermal processing prior to their consumption. However, during thermal processing and long storage of foods, Maillard reaction (MR) often takes place. The MR is a non-enzymatic glycation reaction between the carbonyl group of reducing sugars and compounds having free amino groups. MR may sometimes be beneficial by damaging epitope of allergens and reducing allergenic potential, while exacerbation in allergic reactions may also occur due to changes in the motifs of epitopes or neoallergen generation. Apart from these modulations, non-enzymatic glycation can also modify the food protein(s) with various type of advance glycation end products (AGEs) such as Nϵ-(carboxymethyl-)lysine (CML), pentosidine, pyrraline, and methylglyoxal-H1 derived from MR. These Maillard products may act as immunogen by inducing the activation and proliferation of various immune cells. Literature is available to understand pathogenesis of glycation in the context of various diseases but there is hardly any review that can provide a thorough insight on the impact of glycation in food allergy. Therefore, present review explores the pathogenesis with special reference to food allergy caused by non-enzymatic glycation as well as AGEs.
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Affiliation(s)
- Rinkesh Kumar Gupta
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India.,b Department of Biosciences , Integral University , Lucknow , India
| | - Kriti Gupta
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India
| | - Akanksha Sharma
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India.,c Academy of Scientific and Innovative Research (AcSIR), CSIR-IITR Capmus , Lucknow , India
| | - Mukul Das
- a Food, Drug and Chemical Toxicology Group, Indian Institute of Toxicology Research , Lucknow -, India
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25
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Shumaev KB, Lankin VZ, Konovalova GG, Tikhaze AK, Ruuge EK. The interaction of superoxide radicals with active dicarbonyl compounds. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917020245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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26
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Navarro M, Morales FJ. Evaluation of an olive leaf extract as a natural source of antiglycative compounds. Food Res Int 2016; 92:56-63. [PMID: 28290298 DOI: 10.1016/j.foodres.2016.12.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 12/09/2016] [Accepted: 12/24/2016] [Indexed: 10/20/2022]
Abstract
Advanced Glycation End-products (AGEs) have been associated to diabetes, neurodegenerative and cardiovascular diseases. Mitigating the formation of AGEs is a strategy to avoid detrimental physiopathological effects of age-related chronic diseases. An olive leaf extract (OLE), obtained under acidic conditions, and two fractions, obtained by solid-phase extraction, were characterized by LC-MS/MS. Antiglycative capacity of OLE and fractions were investigated in different in vitro models. The OLE significantly inhibited the formation of Amadori products at the early stage as well as the formation of fluorescent AGEs at the advanced stage of the glycation. Carboxymethyllysine was significantly inhibited by the OLE but it showed weaker activity against argpyrimidine and carboxyethyllysine. The antiglycative activity of each OLE fraction independently did not explain the activity reached in the whole extract, being necessary the compounds present in both fractions. OLE and its fractions were highly effective for trapping reactive dicarbonyl compounds (glyoxal, methylglyoxal, 3-deoxyglucosone and 3-deoxygalactosone). Different adducts resulting from the conjugation of methylglyoxal and hydroxytyrosol in OLE were identified. Results pointed out that OLE exert a broad-spectrum in vitro antiglycative activity.
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Affiliation(s)
- Marta Navarro
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Madrid, Spain
| | - Francisco J Morales
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Madrid, Spain.
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27
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Sun L, Bao C, Chang W, Zhuang Y. Preparation, characterisation, antioxidant and antiglycation activities of the novel polysaccharides from the pileus ofDictyophora rubrovolvata. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13262] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Liping Sun
- Research Center of Food Engineering; Yunnan Institute of Food Safety; Kunming University of Science and Technology; Kunming Yunnan 650224 China
| | - Changjun Bao
- Research Center of Food Engineering; Yunnan Institute of Food Safety; Kunming University of Science and Technology; Kunming Yunnan 650224 China
| | - Weidan Chang
- Research Center of Food Engineering; Yunnan Institute of Food Safety; Kunming University of Science and Technology; Kunming Yunnan 650224 China
| | - Yongliang Zhuang
- Research Center of Food Engineering; Yunnan Institute of Food Safety; Kunming University of Science and Technology; Kunming Yunnan 650224 China
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28
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Preparation, characterization and antiglycation activities of the novel polysaccharides from Boletus snicus. Int J Biol Macromol 2016; 92:607-614. [DOI: 10.1016/j.ijbiomac.2016.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 06/07/2016] [Accepted: 07/03/2016] [Indexed: 11/17/2022]
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29
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Jagdale AD, Bavkar LN, More TA, Joglekar MM, Arvindekar AU. Strong inhibition of the polyol pathway diverts glucose flux to protein glycation leading to rapid establishment of secondary complications in diabetes mellitus. J Diabetes Complications 2016; 30:398-405. [PMID: 26896333 DOI: 10.1016/j.jdiacomp.2016.01.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 12/31/2015] [Accepted: 01/02/2016] [Indexed: 12/01/2022]
Abstract
BACKGROUND Polyol pathway and protein glycation are implicated in establishing secondary complications in diabetes. Their relative contribution to the process needs to be evaluated. It is essential to understand why some aldose reductase inhibitors (ARIs) trials are successful while some have failed and to study their effect on protein glycation. METHODS Aldose reductase (AR) was assayed using xylose as substrate; protein glycation was evaluated using total and specific fluorescence, fructoseamine and protein bound carbonyl content (PCO) measurements. Long term studies were carried out on streptozotocin induced diabetic rats for evaluation of urine parameters, tissue fluorescence. Anti-cataract action was studied by lens culture studies. RESULTS Epalrestat, a commercial ARI was also found to possess potent glycation inhibitory action. Long term experiments revealed strong protein glycation with higher concentration of citronellol (ARI) demonstrating shift in glucose flux. Treatment with epalrestat and limonene revealed improved urine parameters and tissue fluorescence. Lens culture studies revealed cataract formation at higher inhibition of AR while no lens opacity was observed at lower citronellol concentration and with limonene and epalrestat. CONCLUSION Strong inhibition of AR shifts the glucose flux to protein glycation causing damage. ARIs possessing protein glycation inhibition are more useful in amelioration of secondary complications.
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Affiliation(s)
- Ashwini D Jagdale
- Department of Biochemistry, Shivaji University, Kolhapur, 416004 Maharashtra, India
| | - Laxman N Bavkar
- Department of Biochemistry, Shivaji University, Kolhapur, 416004 Maharashtra, India
| | - Tanaji A More
- Department of Biochemistry, Shivaji University, Kolhapur, 416004 Maharashtra, India
| | - Madhav M Joglekar
- Department of Biochemistry, Shivaji University, Kolhapur, 416004 Maharashtra, India
| | - Akalpita U Arvindekar
- Department of Biochemistry, Shivaji University, Kolhapur, 416004 Maharashtra, India.
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30
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Navarro M, Morales FJ. In vitro investigation on the antiglycative and carbonyl trapping activities of hydroxytyrosol. Eur Food Res Technol 2016. [DOI: 10.1007/s00217-015-2614-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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31
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Ranganarayanan P, Thanigesan N, Ananth V, Jayaraman VK, Ramakrishnan V. Identification of Glucose-Binding Pockets in Human Serum Albumin Using Support Vector Machine and Molecular Dynamics Simulations. IEEE/ACM TRANSACTIONS ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS 2016; 13:148-157. [PMID: 26886739 DOI: 10.1109/tcbb.2015.2415806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Human Serum Albumin (HSA) has been suggested to be an alternate biomarker to the existing Hemoglobin-A1c (HbA1c) marker for glycemic monitoring. Development and usage of HSA as an alternate biomarker requires the identification of glycation sites, or equivalently, glucose-binding pockets. In this work, we combine molecular dynamics simulations of HSA and the state-of-art machine learning method Support Vector Machine (SVM) to predict glucose-binding pockets in HSA. SVM uses the three dimensional arrangement of atoms and their chemical properties to predict glucose-binding ability of a pocket. Feature selection reveals that the arrangement of atoms and their chemical properties within the first 4Å from the centroid of the pocket play an important role in the binding of glucose. With a 10-fold cross validation accuracy of 84 percent, our SVM model reveals seven new potential glucose-binding sites in HSA of which two are exposed only during the dynamics of HSA. The predictions are further corroborated using docking studies. These findings can complement studies directed towards the development of HSA as an alternate biomarker for glycemic monitoring.
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Awasthi S, Saraswathi NT. Carbonyl scavenging and chemical chaperon like function of essential amino acids attenuates non-enzymatic glycation of albumin. RSC Adv 2016. [DOI: 10.1039/c5ra27460e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Essential amino acids showed potent antiglycation activity by preventing formation of both early and advanced glycation end products (AGEs).
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Affiliation(s)
- Saurabh Awasthi
- Molecular Biophysics Lab
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur-613401
- India
| | - N. T. Saraswathi
- Molecular Biophysics Lab
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur-613401
- India
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Characterization and biological activities of a novel polysaccharide isolated from raspberry ( Rubus idaeus L.) fruits. Carbohydr Polym 2015; 132:180-6. [DOI: 10.1016/j.carbpol.2015.06.068] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 06/17/2015] [Accepted: 06/20/2015] [Indexed: 11/19/2022]
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34
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Yue C, Chen J, Hou R, Liu J, Li X, Gao Z, Liu C, Wang D, Lu Y, Li H, Hu Y. Effects of Selenylation Modification on Antioxidative Activities of Schisandra chinensis Polysaccharide. PLoS One 2015; 10:e0134363. [PMID: 26230941 PMCID: PMC4521803 DOI: 10.1371/journal.pone.0134363] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 07/08/2015] [Indexed: 11/30/2022] Open
Abstract
The selenylation modification of Schisandra chinensis polysaccharide (SCP) was conducted by the HNO3–Na2SeO3 method respectively under nine conditions according to L9(34) orthogonal design. Nine selenizing SCPs, sSCP1–sSCP9, were obtained, and their antioxidant activities were compared. In vitro test, the free radical-scavenging rates of nine sSCPs were determined for DPPH., .OH and ABTS+. sSCP1 presented the most significant effect, and could inhibit the nonenzymatic protein glycation. In vivo test, 14-day-old chickens were injected respectively with sSCP1 and SCP, the serum contents of CAT, SOD and MDA were determined. The result showed that as compared with the SCP group, the SOD and CAT activities were significantly or numerically raised and MDA content was significantly or numerically lowered in the sSCP1 group. These results indicate that selenylation modification can significantly enhance the antioxidant and antiglycative activity of SCP in vitro or in vivo. sSCP1 possesses the best efficacy and its modification conditions can be as optimal modification conditions that were 200 mg of Na2SeO3 for 500 mg of SCP, reaction temperature of 50°C and reaction time of 6 h.
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Affiliation(s)
- Chanjuan Yue
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Jin Chen
- National Research Center of Veterinary Biological Engineering and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, PR China
| | - Ranran Hou
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Jie Liu
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Xiuping Li
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Zhenzhen Gao
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Cui Liu
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Deyun Wang
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Yu Lu
- National Research Center of Veterinary Biological Engineering and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, PR China
| | - Hongquan Li
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, PR China
| | - Yuanliang Hu
- Institute of Traditional Chinese Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
- * E-mail:
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Yu S, Zhang W, Liu W, Zhu W, Guo R, Wang Y, Zhang D, Wang J. The inhibitory effect of selenium nanoparticles on protein glycation in vitro. NANOTECHNOLOGY 2015; 26:145703. [PMID: 25785463 DOI: 10.1088/0957-4484/26/14/145703] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Selenium nanoparticles (Se NPs) possess well-known excellent biological activities and low toxicity, and have been employed for numerous applications except as inhibitors to protein glycation. Herein, the present study is carried out to investigate the inhibitory effect of Se NPs on protein glycation in a bovine serum albumin (BSA)/glucose system. By measuring the amount of glucose covalently bound onto BSA, the formation of fructosamine and fluorescent products, it is found that Se NPs can hinder the development of protein glycation in a dose-dependent but time-independent manner under the selected reaction conditions (55 °C, 40 h). And after comparing the increase of inhibitory rate in different stages, it is observed that Se NPs show the greatest inhibitory effect in the early stage, then in the advanced stage, but no effect in the intermediate stage. Fourier transform infrared spectroscopy characterization of Se NPs collected after glycation and determination of ·OH influence and glyoxal formation show that the mechanism for the inhibitory efficacy of Se NPs is related to their strong competitive activity against available amino groups in proteins, their great scavenging activity on reactive oxygen species and their inhibitory effect on α-dicarbonyl compounds' formation. In addition, it is proved that Se NPs protect proteins from structural modifications in the system and they do not exhibit significant cytotoxicity towards BV-2 and BRL-3A cells at low concentrations (10 and 50 μg mL(-1)). Consequently, Se NPs may be suitable for further in vivo studies as novel anti-glycation agents.
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Affiliation(s)
- Shaoxuan Yu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
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Navarro M, Fiore A, Fogliano V, Morales FJ. Carbonyl trapping and antiglycative activities of olive oil mill wastewater. Food Funct 2015; 6:574-83. [DOI: 10.1039/c4fo01049c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of natural compounds as antiglycative agents to reduce the load of advanced glycation end products from diet is very promising.
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Affiliation(s)
- Marta Navarro
- Institute of Food Science
- Technology and Nutrition
- E-28040 Madrid
- Spain
| | - Alberto Fiore
- School of Science
- Engineering & Technology
- Division of Food & Life Sciences
- Abertay University
- Dundee DD1 1HG
| | - Vincenzo Fogliano
- Food Quality and Design group
- Wageningen University & Research Centre
- 6700 EV Wageningen
- The Netherlands
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37
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Guo X, Sha X, Cai S, Wang O, Ji B. Antiglycative and Antioxidative Properties of Ethyl Acetate Fraction of Chinese Purple Yam (<i>Dioscorea alata</i> L.) Extracts. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2015. [DOI: 10.3136/fstr.21.563] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- XiaoXuan Guo
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
| | - XiaoHong Sha
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
| | - ShengBao Cai
- Yunnan Institute of Food Safety, Kunming University of Science and Technology
| | - Ou Wang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
| | - BaoPing Ji
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
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38
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Guo X, Sha X, Liu J, Cai S, Wang Y, Ji B. Chinese Purple Yam (<i>Dioscorea alata</i> L.) Extracts Inhibit Diabetes-Related Enzymes and Protect HepG2 Cells Against Oxidative Stress and Insulin Resistance Induced by FFA. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2015. [DOI: 10.3136/fstr.21.677] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- XiaoXuan Guo
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
| | - XiaoHong Sha
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
| | - Jia Liu
- China National Research Institute of Food and Fermentation Industries
| | - ShengBao Cai
- Yunnan Institute of Food Safety, Kunming University of Science and Technology
| | - Yong Wang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
| | - BaoPing Ji
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science and Nutritional Engineering, China Agricultural University
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Qian XP, Zha XQ, Xiao JJ, Zhang HL, Pan LH, Luo JP. Sulfated modification can enhance antiglycation abilities of polysaccharides from Dendrobium huoshanense. Carbohydr Polym 2014; 101:982-9. [DOI: 10.1016/j.carbpol.2013.10.035] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 09/28/2013] [Accepted: 10/12/2013] [Indexed: 11/29/2022]
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Arena S, Salzano AM, Renzone G, D'Ambrosio C, Scaloni A. Non-enzymatic glycation and glycoxidation protein products in foods and diseases: an interconnected, complex scenario fully open to innovative proteomic studies. MASS SPECTROMETRY REVIEWS 2014; 33:49-77. [PMID: 24114996 DOI: 10.1002/mas.21378] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 03/09/2013] [Accepted: 03/09/2013] [Indexed: 06/02/2023]
Abstract
The Maillard reaction includes a complex network of processes affecting food and biopharmaceutical products; it also occurs in living organisms and has been strictly related to cell aging, to the pathogenesis of several (chronic) diseases, such as diabetes, uremia, cataract, liver cirrhosis and various neurodegenerative pathologies, as well as to peritoneal dialysis treatment. Dozens of compounds are involved in this process, among which a number of protein-adducted derivatives that have been simplistically defined as early, intermediate and advanced glycation end-products. In the last decade, various bottom-up proteomic approaches have been successfully used for the identification of glycation/glycoxidation protein targets as well as for the characterization of the corresponding adducts, including assignment of the modified amino acids. This article provides an updated overview of the mass spectrometry-based procedures developed to this purpose, emphasizing their partial limits with respect to current proteomic approaches for the analysis of other post-translational modifications. These limitations are mainly related to the concomitant sheer diversity, chemical complexity, and variable abundance of the various derivatives to be characterized. Some challenges to scientists are finally proposed for future proteomic investigations to solve main drawbacks in this research field.
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Affiliation(s)
- Simona Arena
- Proteomics & Mass Spectrometry Laboratory, ISPAAM, National Research Council, 80147, Naples, Italy
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Pectinase hydrolysis of Dendrobium huoshanense polysaccharide and its effect on protein nonenzymatic glycation. Int J Biol Macromol 2013; 61:439-47. [PMID: 23973510 DOI: 10.1016/j.ijbiomac.2013.08.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 07/22/2013] [Accepted: 08/16/2013] [Indexed: 01/07/2023]
Abstract
The aim of this study was to investigate the inhibitory effects of molecular weight alteration of Dendrobium huoshanense polysaccharide on protein nonenzymatic glycation. For this purpose, one homogeneous active polysaccharide DHPD1 with molecular weight 3.2 kDa was extracted from D. huoshanense. GC analysis showed that DHPD1 was mainly composed of glucose, arabinose, galactose in a molar ratio of 0.023:1.023:0.021 with a trace of mannose and xylose. In order to get DHPD1-derived fragments with different molecular weight, response surface methodology was employed to optimize the enzymatic degradation conditions. The maximum reducing sugar production (0.399 mg/mL) was obtained under an optimal condition including pectinase dosage 126 U/mL, reaction pH 4.46 and reaction temperature 48 °C. By applying this condition, three DHPD1-derived fragments with different molecular weights were obtained through changing the hydrolysis time. Infrared spectroscopy analysis indicated that the backbone structure of DHPD1 was not destroyed by pectinase hydrolysis. Monosaccharide composition analysis showed that pectinase preferred to liberate glucose from DHPD1. The inhibitory action of DHPD1 on protein nonenzymatic glycation reduced with the decrease of molecular weight.
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Han L, Li L, Li B, Zhao D, Li Y, Xu Z, Liu G. Hydroxyl radical induced by lipid in Maillard reaction model system promotes diet-derived N(ε)-carboxymethyllysine formation. Food Chem Toxicol 2013; 60:536-41. [PMID: 23959106 DOI: 10.1016/j.fct.2013.07.081] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 07/20/2013] [Accepted: 07/22/2013] [Indexed: 10/26/2022]
Abstract
N(ε)-carboxymethyllysine (CML) is commonly found in food, and is considered as a potential hazard to human health. However, the effect of lipids on CML formation in Maillard reaction is still not clarified. In this study, the content of diet-derived CML and its key intermediates, epsilon-fructoselysine (FL) and glyoxal (GO), is determined with high performance liquid chromatography mass spectrum (HPLC-MS) in model system containing lipid compounds. According to the results, hydroxyl radical (OH) induced by Fenton reagent can promote the three pathways of CML formation. Moreover, in the Maillard reaction system, linoleic acid (Lin), oleic acid (Ole) and glycerol trioleate (Tri) can induce more OH·, which promotes CML formation. Their level of promoting CML formation is in the order of Ole>Lin>Tri. On the contrary, glycerol (Gly) can scavenge OH·, which inhibit the CML formation. Finally, it is proved that FL content and GO content decreases with heating time in model system, while CML content increases with heating time. Thus, it is concluded that in the Maillard reaction system lipids can induce more OH·, which promotes the conversion from FL and GO to CML. Our research may contribute to the development of inhibitory methods for diet-derived CML by scavenging OH·.
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Affiliation(s)
- Lipeng Han
- College of Light Industry and Food Sciences, South China University of Technology, 381# Wushan Road, Tianhe District, Guangzhou 510640, China; School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
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Anguizola J, Matsuda R, Barnaby OS, Hoy KS, Wa C, DeBolt E, Koke M, Hage DS. Review: Glycation of human serum albumin. Clin Chim Acta 2013; 425:64-76. [PMID: 23891854 DOI: 10.1016/j.cca.2013.07.013] [Citation(s) in RCA: 256] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 07/15/2013] [Accepted: 07/16/2013] [Indexed: 02/07/2023]
Abstract
Glycation involves the non-enzymatic addition of reducing sugars and/or their reactive degradation products to amine groups on proteins. This process is promoted by the presence of elevated blood glucose concentrations in diabetes and occurs with various proteins that include human serum albumin (HSA). This review examines work that has been conducted in the study and analysis of glycated HSA. The general structure and properties of HSA are discussed, along with the reactions that can lead to modification of this protein during glycation. The use of glycated HSA as a short-to-intermediate term marker for glycemic control in diabetes is examined, and approaches that have been utilized for measuring glycated HSA are summarized. Structural studies of glycated HSA are reviewed, as acquired for both in vivo and in vitro glycated HSA, along with data that have been obtained on the rate and thermodynamics of HSA glycation. In addition, this review considers various studies that have investigated the effects of glycation on the binding of HSA with drugs, fatty acids and other solutes and the potential clinical significance of these effects.
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Affiliation(s)
- Jeanethe Anguizola
- Chemistry Department, University of Nebraska, 704 Hamilton Hall, Lincoln, NE 68588-0304, USA
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Nakashima T, Omura S, Takahashi Y. Generation of superoxide anions by a glycation reaction in conventional laboratory media. J Biosci Bioeng 2012; 114:275-80. [PMID: 22658803 DOI: 10.1016/j.jbiosc.2012.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 04/12/2012] [Accepted: 04/12/2012] [Indexed: 10/28/2022]
Abstract
We reported that generation of superoxide anion (O(2)(-)) was detected from conventional laboratory media. The generated O(2)(-) is non-enzymatic converted to hydroxyl radicals, which cause damage to lipids, proteins, and nucleic acids. However, the O(2)(-) generating mechanism from culture media is unclear. We considered that the O(2)(-) generation was implicated in a glycation reaction between reducing sugar and proteins, which is the early stage of Maillard reaction. It has been suggested that the glycated proteins, such as Schiff base and Amadori compounds, undergo a spontaneous autoxidation reaction, catalyzed by transition metal ions, involving the O(2)(-) generation. Therefore, we investigated the effect of Chelex 100 on the O(2)(-) generation from brain-heart-infusion (BHI) medium, which is a nutritional culture medium for bacteria. However, the O(2)(-) generation from the BHI medium treated with Chelex 100 was significantly increased in comparison to it treated without Chelex 100. The quantity of O(2)(-) generation from BHI medium was significantly increased by addition of glucose, and in alkaline environment as well as a glycation reaction model system that autoclaved a mixture solution of glucose and tryptophan. In addition, the O(2)(-) generation from BHI medium was significantly inhibited by pyridoxamine that is a Maillard reaction inhibitor. Therefore, it was suggested that the O(2)(-) generation from BHI medium is closely related to the glycation reaction of amide compounds such as proteins containing in the medium without the transition metals.
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Affiliation(s)
- Takuji Nakashima
- Kitasato Research Organization for Infection Control Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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Wang X, Zhang LS, Dong LL. Inhibitory effect of polysaccharides from pumpkin on advanced glycation end-products formation and aldose reductase activity. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.07.064] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang SH, Chang JC, Pokkaew R, Lee JF, Chiou RYY. Modified fast procedure for the detection and screening of antiglycative phytochemicals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:6906-6912. [PMID: 21568336 DOI: 10.1021/jf201103t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In an attempt to elevate temperature to facilitate glycation, a nonenzymatic reaction by incubation of bovine serum albumin (BSA) and fructose at 50 °C for 24 h has been developed. As conducted and compared to a routine procedure by incubation of BSA and fructose at 37 °C for 168 h, the reactant fluorescence intensities and SDS-PAGE-detected glycated BSA quantities produced by both test temperatures increased with time of incubation. As the Amadori products and α-dicarbonyl compounds during incubation were quantified, both quantities produced at each temperature also increased with an increase of time of incubation, and their trends of changes at both temperatures were similar. In practical application for the detection and screening of the antiglycative phytochemicals, each of 20 peanut root extracts was introduced to a series of BSA-fructose solutions and incubated at 37 and 50 °C for 168 and 24 h, correspondingly. All extracts exhibited notable activities and varied depending on peanut origins. Pair comparison of the resultant antiglycative activities determined at 37 and 50 °C showed that both determined activities for each peanut root extract deviated limitedly. As further analyzed, SDS-PAGE-detected glycated BSA quantities formed at 50 °C were closely proportional to the antiglycative activities determined on the basis of their fluorescence intensities. It is of merit to demonstrate that fluorescence-based determination of BSA-fructose reactant after incubation at 50 °C for 24 h is practical and time-saving in the detection and screening of antiglycative phytochemicals.
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Affiliation(s)
- Shih-Hao Wang
- Department of Food Science, National Chiayi University, Chiayi, Taiwan, Republic of China
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Chompoo J, Upadhyay A, Kishimoto W, Makise T, Tawata S. Advanced glycation end products inhibitors from Alpinia zerumbet rhizomes. Food Chem 2011; 129:709-15. [PMID: 25212289 DOI: 10.1016/j.foodchem.2011.04.034] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 04/07/2011] [Accepted: 04/12/2011] [Indexed: 10/18/2022]
Abstract
Advanced glycation end products (AGEs) are major factors responsible for the complication of diabetes. The present study was carried out to investigate the inhibitory activities on fructosamine adduct and α-dicarbonyl formations by hexane extracts of various parts of Alpinia zerumbet. Furthermore, we isolated two previously known compounds, namely 5,6-dehydrokawain (DK) and dihydro-5,6-dehydrokawain (DDK). 8(17),12-Labdadiene-15,16-dial (labdadiene) was isolated for the first time from the rhizome of A. zerumbet. The results showed that labdadiene (IC50=51.06μg/mL) had similar activity to rutin and quercetin against fructosamine adduct. The inhibition of α-dicarbonyl compounds formation by labdadiene was significantly higher than that of DK and DDK. Our results indicate that labdadiene is a potent antiglycation agent which was found to inhibit AGEs formation in three different steps in the pathway. These data indicate that labdadiene could be used to prevent glycation-associated complications in diabetes.
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Affiliation(s)
- Jamnian Chompoo
- Department of Bioscience and Biotechnology, The United Graduate School of Agricultural Science, Kagoshima University, Kagoshima 890-0065, Japan.
| | - Atul Upadhyay
- Department of Bioscience and Biotechnology, The United Graduate School of Agricultural Science, Kagoshima University, Kagoshima 890-0065, Japan.
| | - Wataru Kishimoto
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Senbaru 1, Nishihara-cho, Okinawa 903-0219, Japan.
| | - Tadahiro Makise
- Life Up Clinic, 750 Minamiuehara, Nakagusuku, Okinawa 901-2424, Japan.
| | - Shinkichi Tawata
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Senbaru 1, Nishihara-cho, Okinawa 903-0219, Japan.
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Rizzi GP, Amba EE, Heineman WR. Quantification of chemically reducing species in the phosphate ion catalyzed degradation of reducing sugars. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:9739-9743. [PMID: 20712365 DOI: 10.1021/jf102433u] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Chemically reducing species formed during phosphate ion catalyzed degradation of reducing sugars were directly quantified by titration with 2,6-dichloroindophenol (Tillman's reagent) and by measurement of open circuit electrical redox potentials. Both techniques demonstrated a time-dependent increased production of chemically reducing species in 0.1 M phosphate buffer at 100 degrees C and the increasingly negative redox potentials observed were consistent with the formation of reductones. Cyclic voltammetry (CV) was investigated in an attempt to generate and observe the sugar-derived highly reactive reducing species in situ. CV analysis of a model Amadori compound, N-(1-deoxyfructos-1-yl)piperidine, indicated oxidative waves consistent with reductone formation, but chemical instability of the oxidation products formed precluded the electrochemical detection of highly electrophilic reducing species such as reductones.
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Affiliation(s)
- George P Rizzi
- Department of Chemistry, Miami University Middletown, Middletown, Ohio 45042, USA.
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