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Roudbari M, Barzegar M, Sahari MA. Pistachio green hull and pomegranate peel extracts as two natural antiglycation agents. Food Sci Nutr 2024; 12:3688-3695. [PMID: 38726394 PMCID: PMC11077175 DOI: 10.1002/fsn3.4039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 02/01/2024] [Accepted: 02/03/2024] [Indexed: 05/12/2024] Open
Abstract
Advanced glycation end products (AGEs) are formed in the final step of the nonenzymatic Maillard reaction, which can contribute to various health problems such as diabetes mellitus, renal failure, and chronic inflammation. Bioactive compounds with antiglycation properties have the potential to inhibit AGE-related diseases. This study investigated the antiglycation potential of pistachio green hull (PGH) and pomegranate peel (PP) extracts, which are polyphenol-rich agro-residues, against fluorescent AGE formation and compared the results with pyridoxine (vitamin B6), metformin, and EDTA (as usual chemical antiglycation agents). The results showed that PGH and PP effectively inhibited the formation of AGEs in bovine serum albumin-glucose (BSA-Glu) and BSA-fructose (BSA-Fru) with antiglycation activities ranging from 92% to 97%. PP extract (with an IC50 of 94 mg ml-1) had a greater antiglycation ability than PGH extract (with an IC50 of 142 mg ml-1). Also, results indicated that the antiglycation activities of the extracts were comparable to that of pyridoxine, and higher than metformin and EDTA. These findings suggest that the two studied extracts can be used for sustainable production of high-added-value food products with a positive effect on consumers' health.
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Affiliation(s)
- Mozhgan Roudbari
- Department of Food Science and Technology, Faculty of AgricultureTarbiat Modares UniversityTehranIran
| | - Mohsen Barzegar
- Department of Food Science and Technology, Faculty of AgricultureTarbiat Modares UniversityTehranIran
| | - Mohammad Ali Sahari
- Department of Food Science and Technology, Faculty of AgricultureTarbiat Modares UniversityTehranIran
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Alhadid A, Bustanji Y, Harb A, Al-Hiari Y, Abdalla S. Vanillic Acid Inhibited the Induced Glycation Using In Vitro and In Vivo Models. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:7119256. [PMID: 36437826 PMCID: PMC9699731 DOI: 10.1155/2022/7119256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 09/21/2022] [Accepted: 10/28/2022] [Indexed: 09/19/2023]
Abstract
BACKGROUND Glycation is implicated in the pathophysiology of many diseases, including diabetes, cancer, neurodegenerative diseases, and aging. Several natural and synthetic compounds were investigated for their antiglycation activity. We evaluated the antiglycation effect of vanillic acid (VA) using in vitro and in vivo experimental models. METHODS In vitro, bovine serum albumin (BSA) (50 mg/ml) was incubated with glucose (50 mM) with or without VA at 1.0-100 mM for 1 week at 37°C, and then, excitation/emission fluorescence was measured at 370/440 nm to determine glycation inhibition. The cytoprotective effect of VA was evaluated using RAW 264.7 cells incubated with or without VA at 7.8-500 μM along with 100-400 μM of methylglyoxal for 48 hours, and cell viability was determined using the MTT assay. Aminoguanidine (AMG) was used as a positive control in both in vitro and cell culture experiments. In vivo, 52 streptozotocin-induced diabetic rats were randomly assigned to 4 groups and treated with 0, 1.5, 4.5, or 15 mg/kg VA for four weeks. Serum fructosamine and blood glycosylated hemoglobin (HbA1c) were then measured, and advanced glycation end-products (AGEs) were detected in the kidneys and the skin of deboned tails using an immunohistochemistry assay. RESULTS VA caused a concentration-dependent effect against BSA glycation (IC50 of 45.53 mM vs. 5.09 mM for AMG). VA enhanced cell viability at all concentrations of VA and methylglyoxal. VA did not affect serum fructosamine or blood HbA1c levels, although it markedly decreased AGEs in the kidney in a dose-dependent manner and decreased AGEs in the skin of deboned tail tissues. CONCLUSION VA had significant antiglycation activity at cellular and long-term glycation.
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Affiliation(s)
- Amani Alhadid
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, Jordan
| | - Yasser Bustanji
- Department of Biopharmaceuticals and Clinical Pharmacy, School of Pharmacy, The University of Jordan, Amman 11942, Jordan
- Department of Basic Medical Sciences, College of Medicine, University of Sharjeh, Sharjeh 27272, UAE
| | - Amani Harb
- Department of Basic Sciences, Faculty of Arts and Sciences, Al-Ahliyya Amman University, Amman, Jordan
| | - Yusuf Al-Hiari
- Department of Pharmaceutical Sciences, School of Pharmacy, The University of Jordan, Amman 11942, Jordan
| | - Shtaywy Abdalla
- Department of Biological Sciences, School of Science, The University of Jordan, Amman 11942, Jordan
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Fernandes ACF, Melo JB, Genova VM, Santana ÁL, Macedo G. Phytochemicals as Potential Inhibitors of Advanced Glycation End Products: Health Aspects and Patent Survey. RECENT ADVANCES IN FOOD, NUTRITION & AGRICULTURE 2022; 13:3-16. [PMID: 34053432 DOI: 10.2174/2212798412666210528130001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/17/2021] [Accepted: 03/06/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND The glycation of proteins and lipids synthesizes the advanced glycation end products (AGEs), i.e., substances that irreversibly damage macromolecules present in tissues and organs, which contribute to the impairment of biological functions. For instance, the accumulation of AGEs induces oxidative stress, the inflammatory responses, and consequently the on set/worsening of diseases, including obesity, asthma, cognitive impairment, and cancer. There is a current demand on natural and low-cost sources of anti-AGE agents. As a result, food phytochemicals presented promising results to inhibit glycation and consequently, the formation of AGEs. OBJECTIVE Here we describe how the AGEs are present in food via Maillard reaction and in organs via natural aging, as well as the effects of AGEs on the worsening of diseases. Also we described the methods used to detect AGEs in samples, and the current findings on the use of phytochemicals (phenolic compounds, phytosterols, carotenoids, terpenes and vitamins) as natural therapeuticals to inhibit health damages via inhibition of AGEs in vitro and in vivo. METHODS This manuscript reviewed publications available in the PubMed and Science Direct databases dated from the last 20 years on the uses of phytochemicals for the inhibition of AGEs. Recent patents on the use of anti-AGEs drugs were reviewed with the use of Google Advanced Patents database. RESULTS AND DISCUSSION There is no consensus about which concentration of AGEs in blood serum should not be hazardous to the health of individuals. Food phytochemicals derived from agroindustry wastes, including peanut skins, and the bagasses derived from citrus and grapes are promising anti-AGEs agents via scavenging of free radicals, metal ions, the suppression of metabolic pathways that induces inflammation, the activation of pathways that promote antioxidant defense, and the blocking of AGE connection with the receptor for advanced glycation endproducts (RAGE). CONCLUSION Phytochemicals derived from agroindustry are promising anti-AGEs, which can be included to replace synthetic drugs to inhibit AGE formation, and consequently to act as therapeutical strategy to prevent and treat diseases caused by AGEs, including diabetes, ovarian cancer, osteoporosis, and Alzheimer's disease.
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Affiliation(s)
- Annayara C F Fernandes
- Bioprocesses Laboratory, Food and Nutrition Department, School of Food Engineering, University of Campinas, UNICAMP, Campinas, SP, Brazil, Cidade Universitária "ZeferinoVaz", Rua Monteiro Lobato, 80, Campinas 13083-862, Brazil
| | - Jeane B Melo
- Bioprocesses Laboratory, Food and Nutrition Department, School of Food Engineering, University of Campinas, UNICAMP, Campinas, SP, Brazil, Cidade Universitária "ZeferinoVaz", Rua Monteiro Lobato, 80, Campinas 13083-862, Brazil
| | - Vanize M Genova
- Bioprocesses Laboratory, Food and Nutrition Department, School of Food Engineering, University of Campinas, UNICAMP, Campinas, SP, Brazil, Cidade Universitária "ZeferinoVaz", Rua Monteiro Lobato, 80, Campinas 13083-862, Brazil
| | - Ádina L Santana
- Bioprocesses Laboratory, Food and Nutrition Department, School of Food Engineering, University of Campinas, UNICAMP, Campinas, SP, Brazil, Cidade Universitária "ZeferinoVaz", Rua Monteiro Lobato, 80, Campinas 13083-862, Brazil.,264 Food Innovation Center, Nebraska Innovation Campus, University of Nebraska-Lincoln, 1901 N 21st street, Lincoln, NE, USA
| | - Gabriela Macedo
- Bioprocesses Laboratory, Food and Nutrition Department, School of Food Engineering, University of Campinas, UNICAMP, Campinas, SP, Brazil, Cidade Universitária "ZeferinoVaz", Rua Monteiro Lobato, 80, Campinas 13083-862, Brazil
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Comakli V, Adem S, Oztekin A, Demirdag R. Screening inhibitory effects of selected flavonoids on human recombinant aldose reductase enzyme: in vitro and in silico study. Arch Physiol Biochem 2022; 128:1368-1374. [PMID: 32463711 DOI: 10.1080/13813455.2020.1771377] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Aldose reductase (AR) is the first enzyme of the polyol pathway that has physiological importance under hyperglycaemic conditions. The article has been focussed on AR enzyme inhibition by selected compounds. For this purpose, the in vitro inhibitory effects of various compounds on commercially available recombinant human AR (rAR) enzyme activity were investigated. The IC50 values of compounds on rAR inhibition effect were found for 6-hydroxy flavone, syringic acid, diosmetin, 6-fluoroflavone, 7-hydroxy-4'-nitroisoflavone, myricetin as 2.05, 2.97, 15.75, 16.1, 49.5, and 63 µM, respectively. 6-Hydroxy flavone and syringic acid competitively inhibited rAR with respect to the NADPH with Ki values 0.509 ± 0.036 and 0.842 ± 0.012 µM. In addition, docking studies were performed to evaluate the potential enzyme binding positions of the compounds. Our in vitro and in silico results indicated that the 6-hydroxy flavone may be a good lead compound in the development of AR inhibitors to prevent diabetic complications.
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Affiliation(s)
- Veysel Comakli
- Nutrition and Dietetics Department, High School of Health, Agri Ibrahim Cecen University, Agri, Turkey
| | - Sevki Adem
- Department of Chemistry, Faculty of Science, Cankiri Karatekin University, Cankiri, Turkey
| | - Aykut Oztekin
- Medical Services and Techniques Department, Vocational School of Health Services, Agri Ibrahim Cecen University, Agri, Turkey
| | - Ramazan Demirdag
- Nutrition and Dietetics Department, High School of Health, Agri Ibrahim Cecen University, Agri, Turkey
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Physicochemical Characterization of In Vitro LDL Glycation and Its Inhibition by Ellagic Acid (EA): An In Vivo Approach to Inhibit Diabetes in Experimental Animals. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5583298. [PMID: 35097119 PMCID: PMC8791751 DOI: 10.1155/2022/5583298] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/12/2021] [Accepted: 12/24/2021] [Indexed: 12/15/2022]
Abstract
Hundreds of millions of people around the globe are afflicted by diabetes mellitus. The alteration in glucose fixation process might result into hyperglycaemia and could affect the circulating plasma proteins to undergo nonenzymatic glycation reaction. If it is unchecked, it may lead to diabetes with increase in advanced glycation end products (AGEs). Therefore, the present study was designed to inhibit the diabetes and glycation by using natural antioxidant “ellagic acid” (EA). In this study, we explored the antidiabetes and antiglycation potential of EA in both in vitro (EA at micromolar concentration) and in vivo systems. The EA concentrations of 10 and 20 mg kg−1B.W./day were administered orally for 25 days to alloxan-induced diabetic rats, a week after confirmation of stable diabetes in animals. Intriguingly, EA supplementation in diabetic rats reversed the increase in fasting blood sugar (FBS) and hemoglobin A1c (HbA1c) level. EA also showed an inhibitory role against glycation intermediates including dicarbonyls, as well as AGEs, investigated in a glycation mixture with in vitro and in vivo animal plasma samples. Additionally, EA treatment resulted in inhibition of lipid peroxidation-mediated malondialdehyde (MDA) and conjugated dienes (CD). Furthermore, EA exhibited an antioxidant property, increased the level of plasma glutathione (GSH), and also helped to decrease histological changes evaluated by histoimmunostaining of animal kidney tissues. The results from our investigation clearly indicates the antiglycative property of EA, suggesting EA as an adequate inhibitor of glycation and diabetes, which can be investigated further in preclinical settings for the treatment and management of diabetes-associated complications.
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Velichkova S, Foubert K, Pieters L. Natural Products as a Source of Inspiration for Novel Inhibitors of Advanced Glycation Endproducts (AGEs) Formation. PLANTA MEDICA 2021; 87:780-801. [PMID: 34341977 DOI: 10.1055/a-1527-7611] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Protein glycation, a post-translational modification found in biological systems, is often associated with a core defect in glucose metabolism. In particular, advanced glycation endproducts are complex heterogeneous sugar-derived protein modifications implicated in the progression of pathological conditions such as atherosclerosis, diabetic complications, skin diseases, rheumatism, hypertension, and neurodegenerative diseases. Undoubtedly, there is the need to expand the knowledge about antiglycation agents that can offer a therapeutic approach in preventing and treating health issues of high social and economic importance. Although various compounds have been under consideration, little data from clinical trials are available, and there is a lack of approved and registered antiglycation agents. Next to the search for novel synthetic advanced glycation endproduct inhibitors, more and more the efforts of scientists are focusing on researching antiglycation compounds from natural origin. The main purpose of this review is to provide a thorough overview of the state of scientific knowledge in the field of natural products from plant origin (e.g., extracts and pure compounds) as inhibitors of advanced glycation endproduct formation in the period between 1990 and 2019. Moreover, the objectives of the summary also include basic chemistry of AGEs formation and classification, pathophysiological significance of AGEs, mechanisms for inhibiting AGEs formation, and examples of several synthetic anti-AGEs drugs.
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Affiliation(s)
- Stefaniya Velichkova
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Kenn Foubert
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Luc Pieters
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
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Tupe RS, Bangar N, Nisar A, Kulkarni A, Sankhe N, Chauhan R, Mistry N, Shaikh S. Piperine exhibits preventive and curative effect on erythrocytes membrane modifications and oxidative stress against in vitro albumin glycation. J Food Biochem 2021; 45:e13846. [PMID: 34219237 DOI: 10.1111/jfbc.13846] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 06/04/2021] [Accepted: 06/14/2021] [Indexed: 11/27/2022]
Abstract
Inhibition of non-enzymatic glycation processes is an essential aspect of treating type 2 diabetes and related complications. In this study, piperine's preventative, simultaneous and curative effect in glucose-induced albumin glycation was examined by analyzing the structural and functional markers of albumin. The protective and antioxidant influence of piperine on erythrocytes was assessed by examining cellular membrane modifications with antioxidant status. Albumin glycation was performed in three different experimental sets of 21 days at 37°C in dark conditions-using different piperine concentrations (250, 500, and 1,000 μM) and time of addition of glucose (30 mM)/piperine (1,000 μM) in a respective solution at 10th day. Piperine with glycated albumin leads to decreased fructosamine, carbonyl group, and protein-bound glucose. It had protected free amino groups, thiol group, and reduced beta-amyloid, protein aggregates formation. The presence of piperine with glycated albumin prevented erythrocytes hemolysis, membrane modifications, and maintained the antioxidant status. Piperine showed the antiglycation effects in a dose-dependent manner, additionally, its pre-treatment exhibited maximum attenuation by manifesting its primarily preventive role. PRACTICAL APPLICATIONS: Piperine is a natural alkaloid compound found in pepper, has been reported to possess anti-cancer, anti-microbial, and anti-inflammatory properties. The present study evaluated the antiglycation potential of piperine in albumin's glycation and it displayed preventive action, protected erythrocytes from oxidative damage induced by glycated albumin. We concluded that the daily intake of piperine can be adequate to prevent glycation-induced diabetic complications development in hyperglycemic conditions.
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Affiliation(s)
- Rashmi S Tupe
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, India
| | - Nilima Bangar
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Lavale, Pune, India
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Akib Nisar
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Amruta Kulkarni
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Neena Sankhe
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Rohan Chauhan
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Nidhi Mistry
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
| | - Shamim Shaikh
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth (Deemed to be University), Pune, India
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Dietary polyphenols inhibit plasma protein arabinosylation: Biomolecular interaction of genistein and ellagic acid with serum albumins. Biophys Chem 2021; 277:106651. [PMID: 34217110 DOI: 10.1016/j.bpc.2021.106651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/22/2021] [Accepted: 06/22/2021] [Indexed: 01/08/2023]
Abstract
The mode of interaction of polyphenolic compounds like genistein (GTN) and ellagic acid (EGA) with human and bovine serum albumin (HSA and BSA, respectively) was found to differ significantly. Stern-Volmer (SV) analysis of the fluorescence quenching data revealed that the binding strength of EGA (1.9 ± 0.09 × 105 M-1) to HSA is about one order of magnitude higher than GTN (2.24 ± 0.06 × 104 M-1). While the static quenching of HSA fluorescence was found to proceed through simple Stern-Volmer (SV) mechanism, a quenching sphere-of-action model was indispensable for BSA. Temperature dependent fluorescence along with a series of other biophysical experiments and ensemble docking calculation revealed that EGA and GTN bind to the serum proteins primarily through the entropy driven process. The α-helical content and the microenvironment near Trp residue of HSA and BSA did not show any appreciable change due to the binding of either GTN or EGA. Interestingly, both GTN and EGA were found to inhibit the formation of advanced glycated end (AGE) product of serum proteins up to the extent of 70-90% within 12-24 h. Relatively moderate binding propensity along with the anti-glycation ability of the polyphenols confirmed that GTN and EGA can be used either as an alternative or towards development of suitable drugs in the prevention of many diabetic-related complications.
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Ávila F, Ravello N, Manriquez C, Jiménez-Aspee F, Schmeda-Hirschmann G, Theoduloz C. Antiglycating Effect of Phenolics from the Chilean Currant Ribes cucullatum under Thermal Treatment. Antioxidants (Basel) 2021; 10:antiox10050665. [PMID: 33922890 PMCID: PMC8146124 DOI: 10.3390/antiox10050665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 01/18/2023] Open
Abstract
Numerous dietary polyphenols possess antiglicating activity, but the effects of thermal treatment on this activity are mostly unknown. The effect of thermal treatment in the antiglycating activity of polyphenolic enriched extracts (PEEs) from Ribes cucullatum towards glyoxal-induced glycation of sarcoplasmic proteins was assessed. Sarcoplasmic proteins from chicken, beef, salmon, and turkey, were incubated 2 h at 60 °C with and without glyoxal and different concentrations of PEEs (0.25, 0.5, 1, and 5 mg/mL). The antiglycating activity was evaluated by: (1) Lys and Arg consumption, (2) Carboxymethyl lysine (CML) generation, and (3) lipid-derived electrophiles inhibition in a gastric digestion model. Protective effects were observed against CML generation in proteins and a decrease of electrophiles in the gastric digestion model. A dose-dependent consumption of Lys and Arg in proteins/PEEs samples, indicated the possible occurrence of quinoproteins generation from the phenolics. Protein/PEEs incubations were assessed by: (1) High pressure liquid chromatography analysis, (2) Gel electrophoresis (SDS-PAGE), and (3) Redox cycling staining of quinoproteins. Protein/PEEs incubations produced: (1) Decrease in phenolics, (2) increase of protein crosslinking, and (3) dose-dependent generation of quinoproteins. We demonstrate that phenolic compounds from R. cucullatum under thermal treatment act as antiglycating agents, but oxidative reactions occurs at high concentrations, generating protein crosslinking and quinoproteins.
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Affiliation(s)
- Felipe Ávila
- Escuela de Nutrición y Dietética, Facultad de Ciencias de la Salud, Campus Lircay, Universidad de Talca, Talca 3460000, Chile; (N.R.); (C.M.)
- Correspondence: ; Tel.: +56-71-2418964
| | - Natalia Ravello
- Escuela de Nutrición y Dietética, Facultad de Ciencias de la Salud, Campus Lircay, Universidad de Talca, Talca 3460000, Chile; (N.R.); (C.M.)
| | - Camila Manriquez
- Escuela de Nutrición y Dietética, Facultad de Ciencias de la Salud, Campus Lircay, Universidad de Talca, Talca 3460000, Chile; (N.R.); (C.M.)
| | - Felipe Jiménez-Aspee
- Department of Food Biofunctionality, Institute of Nutritional Sciences, University of Hohenheim, 70599 Stuttgart, Germany;
| | - Guillermo Schmeda-Hirschmann
- Laboratorio de Química de Productos Naturales, Instituto de Química de Recursos Naturales, Campus Lircay, Universidad de Talca, Talca 3460000, Chile;
| | - Cristina Theoduloz
- Laboratorio de Cultivo Celular, Facultad de Ciencias de la Salud, Campus Lircay, Universidad de Talca, Talca 3460000, Chile;
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Behl T, Velpandian T, Kotwani A. Terminalia catappa Fruit Extract Reverses Streptozotocin-Induced Diabetic Retinopathy in Rats. Endocr Metab Immune Disord Drug Targets 2020; 21:1053-1065. [PMID: 33121423 DOI: 10.2174/1871530320666201029142113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 11/22/2022]
Abstract
OBJECTIVE AND BACKGROUND Diabetic retinopathy is amongst the most common microvascular complications associated with diabetes. Controlling blood glucose level alone cannot manage diabetes associated complications. Thus, mechanisms that additionally prevent diabetes associated complications are the need of the hour, driving the researchers towards herbal therapies. Terminalia catappa is renowned for its anti-inflammatory, antioxidant, anti-hyperglycemic and anti-angiogenic activity. The current study explores the effect of Terminalia catappa fruit extract on streptozotocin-induced diabetic retinopathy in rats. METHODS Streptozotocin-induced chronic diabetic rat model was utilized in the study. The hydroalcoholic fruit extract of T. catappa in 20mg/kg, 30mg/kg and 40mg/kg dose and standard anti-diabetic drug, glibenclamide (10mg/kg) was given orally. Retinopathy was evaluated by monitoring lenticular, fundus images and measuring arteriole and venule tortuosity index. Oxidative, angiogenic and inflammatory biomarkers were assessed at the 12th week in the retinal homogenate. Histopathological changes in the retina were also examined. Data was analyzed using one-way Repeated Measure ANOVA followed by the Mann-Whitney test. RESULTS The hydro-alcoholic fruit extract of T. catappa significantly decreased blood glucose (p<0.001) in a dose-dependent manner in diabetic rats. Cataract lens was observed in all experimental groups and became clear (grade 0) with 40mg/kg and with 40mg/kg along with glibenclamide at the eighth and sixth week, respectively. The hydro-alcoholic fruit extract in all three doses significantly reduced (p<0.01) arteriole and venule tortuosity in diabetic rats. T. catappa in all three doses in diabetic rats showed a modulatory effect in oxidative, angiogenic and inflammatory biomarkers. CONCLUSION T. catappa reverses diabetes-induced retinopathy by anti-hyperglycemic, anti-oxidant, anti-angiogenic and anti-inflammatory actions, and thus has a potential to be used in diabetes-induced retinopathy.
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Affiliation(s)
- Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Thirumurthy Velpandian
- Department of Ocular Pharmacology, All India Institute of Medical Sciences, New Delhi, India
| | - Anita Kotwani
- Department of Pharmacology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India
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Dariya B, Nagaraju GP. Advanced glycation end products in diabetes, cancer and phytochemical therapy. Drug Discov Today 2020; 25:1614-1623. [PMID: 32652310 DOI: 10.1016/j.drudis.2020.07.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 06/04/2020] [Accepted: 07/03/2020] [Indexed: 02/08/2023]
Abstract
The irreversible glycation and oxidation of proteins and lipids produces advanced glycation end products (AGEs). These modified AGEs are triggered to bind the receptor for AGE (RAGE), thereby activating its downstream signaling pathways, such as nuclear factor (NF)-κB and phosphoinositide 3-kinase (PI3K)/Akt, ultimately leading to diabetes and cancers. In this review, we focus on the interaction of AGE-RAGE and their associated pathways. We also consider the activity of phytochemicals, such as genistein and curcumin, that trap dicarbonyl compounds including methylglyoxal (MG) and glyoxalase that arise from multiple pathways to block AGE formation and prevent its interaction with RAGE.
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Affiliation(s)
- Begum Dariya
- Department of Biosciences and Biotechnology, Banasthali University, Banasthali, Rajasthan 304022, India
| | - Ganji Purnachandra Nagaraju
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University, Atlanta, GA 30322, USA.
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Inhibitory effect of phenolic compounds and plant extracts on the formation of advance glycation end products: A comprehensive review. Food Res Int 2020; 130:108933. [DOI: 10.1016/j.foodres.2019.108933] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 12/22/2022]
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Kharat P, Sarkar P, Mouliganesh S, Tiwary V, Priya VBR, Sree NY, Annapoorna HV, Saikia DK, Mahanta K, Thirumurugan K. Ellagic acid prolongs the lifespan of Drosophila melanogaster. GeroScience 2019; 42:271-285. [PMID: 31786733 DOI: 10.1007/s11357-019-00135-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/06/2019] [Indexed: 12/11/2022] Open
Abstract
Wild-type Canton-S flies of Drosophila melanogaster were treated with ellagic acid at 100 μM and 200 μM concentrations. Longevity assay showed male flies fed with 200 μM ellagic acid displayed longer mean lifespan and maximum lifespan than control flies. Female flies fed with 200 μM ellagic acid laid less number of eggs than control. The eclosion time was less in female flies fed with 200 μM ellagic acid. Ellagic acid fed female flies performed better than male flies and control flies for heat shock tolerance and starvation stress. Male flies treated with 100 μM ellagic acid recovered faster from cold shock compared with control flies. Male and female flies treated with ellagic acid displayed increased survival following exposure to 5% hydrogen peroxide. Gene expression studies displayed upregulated expressions of CAT, dFOXO, ATG1, and SOD2 in ellagic acid-treated male flies, and upregulated expressions of dFOXO, CAT, and SOD2 in ellagic acid-treated female flies. Results from these studies show the pro-longevity effect of ellagic acid on Drosophila melanogaster.
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Affiliation(s)
- Priyanka Kharat
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - Priyanka Sarkar
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - S Mouliganesh
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - Vaibhav Tiwary
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - V B Ramya Priya
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - N Yamini Sree
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - H Vinu Annapoorna
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - Diganta K Saikia
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - Kaustav Mahanta
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India
| | - Kavitha Thirumurugan
- 206, Structural Biology Laboratory, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632 014, India.
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Laddha AP, Kulkarni YA. Tannins and vascular complications of Diabetes: An update. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 56:229-245. [PMID: 30668344 DOI: 10.1016/j.phymed.2018.10.026] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/19/2018] [Accepted: 10/20/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Diabetes mellitus is a chronic metabolic disorder associated with persistent increased level of glucose in the blood. According to a report by World Health Organisation (WHO), prevalence of diabetes among adults over 18 years of age had reached to 8.5% in year 2014 which was 4.7% in 1980s. The Prolong increased level of glucose in blood leads to development of microvascular (blindness, nephropathy and neuropathy) and macrovascular (cardiovascular and stroke) degenerative complications because of uncontrolled level of glucose in blood. This also leads to the progression of oxidative stress and affecting metabolic, genetic and haemodynamic system by activation of polyol pathway, protein kinase C pathway, hexosamine pathway and increases advanced glycation end products (AGEs) formation. Diabetes mellitus and its associated complications are one of the major leading causes of mortality worldwide. Various natural products like alkaloids, glycosides, flavonoids, terpenoids and polyphenols are reported for their activity in management of diabetes and its associated diabetic complications. Tannins are systematically studied by many researchers in past few decades for their effect in diabetes and its complications. AIM The present review was designed to compile the data of tannins and their beneficial effects in the management of diabetic complications. METHOD Literature search was performed using various dataset like pubmed, EBSCO, proQuest Scopus and selected websites including the National Institutes of Health (NIH) and the World Health Organization (WHO). RESULTS Globally, more than 400 natural products have been investigated in diabetes and its complications. Tannins are the polyphenolic compounds present in many medicinal plants and various dietary sources like fruits, nuts, grains, spices and beverages. Various reports have shown that compounds like gallic acid, ellagic acid, catechin, epicatechin and procynidins from medicinal plants play major role in controlling progression of diabetes and its related complications by acting on molecular pathways and key targets involved in progression. Many chemists used above mentioned phyto-constituents as a pharmacophore for the developing new chemical entities having higher therapeutic benefits in management of diabetic complications. CONCLUSION This review focuses on the role of various tannins in prevention and management of diabetic complications like diabetic nephropathy, diabetic neuropathy, diabetic retinopathy and diabetic cardiomyopathy. It will help researchers to find some leads for the development of new cost effective therapy using dietary source for the management of diabetic complications.
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Affiliation(s)
- Ankit P Laddha
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L. Mehta Road, Vile Parle (W), Mumbai 400 056, India
| | - Yogesh A Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM's NMIMS, V.L. Mehta Road, Vile Parle (W), Mumbai 400 056, India.
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Phang SCW, Palanisamy UD, Kadir KA. Effects of geraniin (rambutan rind extract) on blood pressure and metabolic parameters in rats fed high-fat diet. JOURNAL OF INTEGRATIVE MEDICINE-JIM 2019; 17:100-106. [DOI: 10.1016/j.joim.2019.01.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 12/05/2018] [Indexed: 12/16/2022]
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Nabi R, Alvi SS, Saeed M, Ahmad S, Khan MS. Glycation and HMG-CoA Reductase Inhibitors: Implication in Diabetes and Associated Complications. Curr Diabetes Rev 2019; 15:213-223. [PMID: 30246643 DOI: 10.2174/1573399814666180924113442] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 07/17/2018] [Accepted: 09/19/2018] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Diabetes Mellitus (DM) acts as an absolute mediator of cardiovascular risk, prompting the prolonged occurrence, size and intricacy of atherosclerotic plaques via enhanced Advanced Glycation Endproducts (AGEs) formation. Moreover, hyperglycemia is associated with enhanced glyco-oxidized and oxidized Low-Density Lipoprotein (LDL) possessing greater atherogenicity and decreased the ability to regulate HMG-CoA reductase (HMG-R). Although aminoguanidine (AG) prevents the AGE-induced protein cross-linking due to its anti-glycation potential, it exerts several unusual pharmaco-toxicological effects thus restraining its desirable therapeutic effects. HMG-R inhibitors/ statins exhibit a variety of beneficial impacts in addition to the cholesterol-lowering effects. OBJECTIVE Inhibition of AGEs interaction with receptor for AGEs (RAGE) and glyco-oxidized-LDL by HMG-R inhibitors could decrease LDL uptake by LDL-receptor (LDL-R), regulate cholesterol synthesis via HMG-R, decrease oxidative and inflammatory stress to improve the diabetes-associated complications. CONCLUSION Current article appraises the pathological AGE-RAGE concerns in diabetes and its associated complications, mainly focusing on the phenomenon of both circulatory AGEs and those accumulating in tissues in diabetic nephropathy, diabetic neuropathy, and diabetic retinopathy, discussing the potential protective role of HMG-R inhibitors against diabetic complications.
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Affiliation(s)
- Rabia Nabi
- Clinical Biochemistry & Natural Product Research Lab, Department of Biosciences, Integral University, Lucknow, 226026, U.P, India
| | - Sahir Sultan Alvi
- Clinical Biochemistry & Natural Product Research Lab, Department of Biosciences, Integral University, Lucknow, 226026, U.P, India
| | - Mohammad Saeed
- Department of Clinical Lab. Sciences, College of Applied Medical Sciences, University of Hail, Hail, Saudi Arabia
| | - Saheem Ahmad
- Laboratory of Glycation Biology and Metabolic Disorders, Department of Biosciences, Integral University Lucknow, 226026, U.P, India
| | - Mohammad Salman Khan
- Clinical Biochemistry & Natural Product Research Lab, Department of Biosciences, Integral University, Lucknow, 226026, U.P, India
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Ahangarpour A, Sayahi M, Sayahi M. The antidiabetic and antioxidant properties of some phenolic phytochemicals: A review study. Diabetes Metab Syndr 2019; 13:854-857. [PMID: 30641821 DOI: 10.1016/j.dsx.2018.11.051] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 11/29/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND One class of phytochemicals are phenols with (OH) group bounded to aromatic hydrocarbon group. The aim of this study was to review the anti-diabetic and anti-oxidant properties of important phenols. METHODS This is a review study with ethic number (95s108) from AJUMS. About 450 articles (original, review,etc) been screened; 40 of them in the range of (1992-2017) were used due to their correlation to the study purpose. 28 of them were indexed by "Web of science (ISI)", 24 of them indexed by pubmed and also 29 of them were indexed by scopus data center. FINDINGS Phenols affect diabetes in different ways. CGA suppress hepatic gluconeogenesis through the inhibition of G6Pase and is also an insulin sensitizer that potentiates insulin action. Curcumin reduce insulin resistance so decrease AGE's products in diabetes mellitus. Hydroxytyrosol regulates the calcium channels which plays key role in insulin secretion. Resveratrol increase the stimulation of glucose uptake and insulin secretion. CGA has similar antioxidant activity as vitamin E and ellagic acid maybe is even more potent than vitamin E. curcumin inhibits lipid peroxidation and scavenge superoxide anion and hydroxyl radicals. The antioxidant activity of hydroxytyrosol protects pancreatic cells from damage and death. Treatment with resveratrol significantly decreases the level of glucosylated hemoglobin. CONCLUSION All these phytochemicals have potent antidiabetic and antioxidant effects in different ways beside their other effects like anti-inflammatory and anti-carcinogenic properties in ellagic acid, or like anti-angiogenic and apoptogenic activities in curcumin. So we suggest further studies in the field of diabetes and antioxidation.
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Affiliation(s)
- Akram Ahangarpour
- Department of Physiology and School of Medicine, Physiology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Majed Sayahi
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Miaad Sayahi
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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Zhang Y, Liu C, Su M, Roux KH, Sathe SK. Effect of phenolics on amandin immunoreactivity. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Bejarano E, Taylor A. Too sweet: Problems of protein glycation in the eye. Exp Eye Res 2018; 178:255-262. [PMID: 30145354 DOI: 10.1016/j.exer.2018.08.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/03/2018] [Accepted: 08/22/2018] [Indexed: 01/06/2023]
Abstract
Laboratory and epidemiological data indicate that high blood sugar levels and/or consuming high glycemia diets are linked to multiple age-related diseases, including age-related macular degeneration, cataract, Parkinson's disease, Alzheimer's disease, diabetic retinopathy, and, apparently glaucoma. High concentrations of blood sugar and perturbations of the systems that regulate blood sugar lead to the accumulation of advanced-glycation end products (AGEs). AGEs are toxic compounds that are formed from the combination of sugars and their metabolites with biomolecules in a non-enzymatic biochemical reaction called glycation. In vitro and in vivo data indicate that high sugar consumption is associated with accumulation of AGEs in a variety of human tissues. Hyperglycemia, along with an oxidative environment and limited cell proliferation in many ocular tissues, encourages formation and precludes dilution of AGEs and associated damage by cell division. These circumstances make many eye tissues vulnerable to glycation-derived damage. Here, we summarize research regarding glycation-induced ocular tissue dysfunction and its contribution to the onset and development of eye disorders. We also discuss how management of carbohydrate nutrition may provide a low-cost way to ameliorate the progression of AGEs-related diseases, including age related macular degeneration and some cataracts, as they do for cardiovascular disease and diabetes.
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Affiliation(s)
- Eloy Bejarano
- Laboratory for Nutrition and Vision Research, USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington St, Boston, MA, 02111, USA.
| | - Allen Taylor
- Laboratory for Nutrition and Vision Research, USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington St, Boston, MA, 02111, USA.
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Muthukumaran S, Tranchant C, Shi J, Ye X, Xue SJ. Ellagic acid in strawberry (Fragaria spp.): Biological, technological, stability, and human health aspects. FOOD QUALITY AND SAFETY 2017. [DOI: 10.1093/fqsafe/fyx023] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Alim Z, Kilinç N, Şengül B, Beydemir Ş. Inhibition behaviours of some phenolic acids on rat kidney aldose reductase enzyme: an in vitro study. J Enzyme Inhib Med Chem 2017; 32:277-284. [PMID: 28111996 PMCID: PMC6009866 DOI: 10.1080/14756366.2016.1250752] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 10/07/2016] [Accepted: 10/11/2016] [Indexed: 12/17/2022] Open
Abstract
Aldose reductase (AR) inhibitors have vital importance in the treatment and prevention of diabetic complications. In this study, rat kidney AR was purified 19.34-fold with a yield of 3.49% and a specific activity of 0.88 U/mg using DE-52 Cellulose anion exchange chromatography, gel filtration chromatography and 2'5' ADP Sepharose-4B affinity chromatography, respectively. After purification, the in vitro inhibition effects of some phenolic acids (tannic acid, chlorogenic acid, sinapic acid, protocatechuic acid, 4-hydroxybenzoic acid, p-coumaric acid, ferulic acid, vanillic acid, syringic acid, α-resorcylic acid, 3-hydroxybenzoic acid and gallic acid) were investigated on purified enzyme. We determined IC50, Ki values and inhibition types of these phenolic acids. As a result, tannic and chlorogenic acid had a strong inhibition effect. On the other hand, gallic acid had a weak inhibition effect. In this study, all phenolic acids except for chlorogenic acid and p-coumaric acid showed non-competitive inhibition effects on rat kidney AR.
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Affiliation(s)
- Zuhal Alim
- Department of Chemistry, Faculty of Science and Arts, Ahi Evran University, Kirşehir, Turkey
| | - Namik Kilinç
- Department of Medical Services and Techniques, Vocational School of Health Service, Iğdir University, Iğdir, Turkey
| | - Bülent Şengül
- Deparment of Health Care Service, Vocational School of Health Service, Bayburt University, Bayburt, Turkey
| | - Şükrü Beydemir
- Department of Chemistry, Faculty of Sciences, Atatürk University, Erzurum, Turkey
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
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22
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Chen SJ, Aikawa C, Yoshida R, Kawaguchi T, Matsui T. Anti-prediabetic effect of rose hip (Rosa canina) extract in spontaneously diabetic Torii rats. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:3923-3928. [PMID: 28182280 DOI: 10.1002/jsfa.8254] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 02/01/2017] [Accepted: 02/02/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Prediabetes, a high-risk state for developing diabetes showing impaired glucose tolerance but a normal fasting blood glucose level, has an increasing prevalence worldwide. However, no study investigating the prevention of impaired glucose tolerance at the prediabetic stage by anti-diabetic functional foods has been reported. Thus, the present study aimed to evaluate the anti-prediabetic effect of rose hip in a prediabetic rat model. RESULTS Spontaneously diabetic Torii (SDT) rats were supplemented with hot-water extract of rose hip at a dose of 100 mg kg-1 body weight day-1 for 12 weeks. The results obtained showed that the supplementation of rose hip extract improved impaired glucose tolerance, promoted insulin secretion, preserved pancreatic beta-cell function and suppressed plasma advanced glycation end-products formation of methylglyoxal-derived hydroimidazolone (MG-H1) residue and Nϵ -carboxymethyl-lysine residues (e.g. MG-H1, control: 465.5 ± 43.8 versus rose hip: 59.1 ± 13.0 pmol mg protein-1 , P < 0.05) in SDT rats at the prediabetic stage (12-20 weeks old). CONCLUSION The present study provides the first evidence showing that a hot-water extract of rose hip could exert an anti-prediabetic effect in a rat model. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Si Jing Chen
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
| | - Chiwa Aikawa
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
| | - Risa Yoshida
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
| | - Tomoaki Kawaguchi
- Biotechnology and Food Research Institute, Fukuoka Industrial Technology Center, Kurume, Japan
| | - Toshiro Matsui
- Division of Bioscience and Bioenvironmental Sciences, Faculty of Agriculture, Graduate School of Kyushu University, Fukuoka, Japan
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Mynampati BK, Ghosh S, Muthukumarappa T, Ram J. Evaluation of antioxidants and argpyrimidine in normal and cataractous lenses in north Indian population. Int J Ophthalmol 2017; 10:1094-1100. [PMID: 28730112 DOI: 10.18240/ijo.2017.07.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/19/2017] [Indexed: 01/18/2023] Open
Abstract
AIM To assess the level of glutathione, thioltransferase, and argpyrimidine in nuclear and cortical cataractous lenses as well as in the clear lenses in the north Indian population. METHODS Human cataractous lenses were collected from the patients who underwent extracapsular cataract extraction surgery; clear lenses were collected from the freshly donated eye bank eyes. Antioxidant molecules such as glutathione and thioltransferase enzyme activity were measured; simultaneously in these lenses a blue fluorophore argpyrimidine, an advanced glycation end (AGE) product level was assessed using high performance liquid chromatography (HPLC). RESULTS The protein concentration was found to be present at higher levels in the control lenses compared to cataract lenses. A significant decrease in the glutathione level was observed in the nuclear cataractous lenses compared to cortical cataractous (P=0.004) and clear lenses (P≤0.005), but no significant change in the level of antioxidant enzyme thioltransferase was observed. Further, argpyrimidine a blue fluorophore (AGE) was found to be significantly higher in the nuclear cataract (P=0.013) compared to cortical cataract lenses. CONCLUSION Antioxidants such as glutathione significantly decrease in age-related nuclear and cortical cataract and an AGE, argpyrimidine are present at significantly higher levels in nuclear cataract.
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Affiliation(s)
- Bharani K Mynampati
- Department of Ophthalmology, Advanced Eye Center, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Sujata Ghosh
- Department of Experimental Medicine & Biotechnology, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Thungapathra Muthukumarappa
- Department of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Jagat Ram
- Department of Ophthalmology, Advanced Eye Center, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
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Yang JE, Chun SH, Kim HH, Choi HD, Lee KW. Characterization of Maillard-type lysozyme-galactomannan conjugate having immune-enhancing effects. Food Chem 2017; 227:149-157. [DOI: 10.1016/j.foodchem.2017.01.076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 12/16/2016] [Accepted: 01/15/2017] [Indexed: 10/20/2022]
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25
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Raghu G, Akileshwari C, Reddy VS, Reddy GB. Attenuation of diabetic retinopathy in rats by ellagic acid through inhibition of AGE formation. Journal of Food Science and Technology 2017; 54:2411-2421. [PMID: 28740299 DOI: 10.1007/s13197-017-2683-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/28/2017] [Accepted: 05/02/2017] [Indexed: 12/13/2022]
Abstract
Diabetic retinopathy (DR) is a major concern for blindness all over the world. Diabetic retinopathy is associated with thickening of basement membrane, retinal thinning, retinal detachment, and pericyte death. Advanced glycation end products (AGEs) mediate the progression of DR by stimulating the expression of RAGE and VEGF which subsequently damages the blood-retinal barrier. Employing a set of in vitro protein glycation systems, earlier we demonstrated antiglycating potential of ellagic acid (EA). In this study, we evaluated the efficacy of EA to prevent in vivo accumulation of AGE and to ameliorate retinal changes in diabetic rats. Streptozotocin-induced diabetic rats were fed either with 0.2 or 2% EA in the diet for 12 weeks. Effect of EA on retinal function was assessed with electroretinogram (ERG). At the end of the experiment, rats were scarified and retina was collected. Histology was carried out with H&E staining and immunohistochemistry. Formation of AGE product (CML) and activation of RAGE was analyzed by immunoblotting and immunohistochemistry. Expression of GFAP, VEGF, Bax and HIF-1α was assessed by qRT-PCR and immunoblotting. Dietary supplementation of EA to diabetic rats resulted in: (1) inhibition of accumulation of CML and activation of RAGE in retina, (2) attenuation of expression of GFAP, VEGF, and HIF-1α in retina, (3) attenuation of cell death by reducing proapoptic mediator Bax and (4) amelioration of retinal thickness and function. In conclusion, EA attenuated the retinal abnormalities including angiogenesis, hypoxia and cell death by inhibiting AGE-RAGE mediated cellular events.
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Affiliation(s)
- G Raghu
- Biochemistry Division, National Institute of Nutrition, Tarnaka, Jamai-Osmania, Hyderabad, 500 007 India
| | - C Akileshwari
- Biochemistry Division, National Institute of Nutrition, Tarnaka, Jamai-Osmania, Hyderabad, 500 007 India
| | - V Sudhakar Reddy
- Biochemistry Division, National Institute of Nutrition, Tarnaka, Jamai-Osmania, Hyderabad, 500 007 India
| | - G Bhanuprakash Reddy
- Biochemistry Division, National Institute of Nutrition, Tarnaka, Jamai-Osmania, Hyderabad, 500 007 India
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Perera PRD, Ekanayake S, Ranaweera KKDS. Antidiabetic Compounds in Syzygium cumini Decoction and Ready to Serve Herbal Drink. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2017; 2017:1083589. [PMID: 28572825 PMCID: PMC5440793 DOI: 10.1155/2017/1083589] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 04/10/2017] [Indexed: 01/18/2023]
Abstract
Herbal beverages with desirable sensory attributes are an ideal way to offer consumers with phytochemicals having specific health promoting functionalities. Syzygium cumini bark decoction is used in treating diabetes mellitus in Ayurveda medicine. This work attempted to prove the presence of antidiabetic compounds in the S. cumini decoction and the ready to serve (RTS) herbal drink developed using the decoction. Activity guided fractionation of the decoction of the S. cumini was carried out by sequential extraction with organic solvents of different polarities. Thin Layer Chromatography (TLC) with authentic compounds and HPLC were performed for identification and confirmation of the compounds in the decoction and the RTS herbal drink. Presence of gallic and ellagic acids in the decoction and RTS herbal drink was proven and confirmed with HPLC. The LC UV-VIS spectra of the two compounds were identical with the corresponding spectra of the library. Further, gallic acid and umbelliferone were determined as the active compounds in the decoction by TLC and were confirmed by cochromatography with authentic compounds. The present investigation confirmed the presence of gallic acid, ellagic acid, and umbelliferone which are proven to have antidiabetic activities in the decoction and the RTS herbal drink prepared with the decoction.
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Affiliation(s)
- P. R. D. Perera
- Department of Food Science and Technology, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - S. Ekanayake
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - K. K. D. S. Ranaweera
- Department of Food Science and Technology, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
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Patil KK, Gacche RN. Inhibition of glycation and aldose reductase activity using dietary flavonoids: A lens organ culture studies. Int J Biol Macromol 2017; 98:730-738. [DOI: 10.1016/j.ijbiomac.2017.01.129] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 01/16/2017] [Accepted: 01/30/2017] [Indexed: 12/01/2022]
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28
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Prasanna G, Hari N, Saraswathi N. Hydroxy methoxy benzaldehyde from Sesbania grandilfora inhibits the advanced glycation end products (AGEs)-mediated fibrillation in hemoglobin. J Biomol Struct Dyn 2017; 36:819-829. [DOI: 10.1080/07391102.2017.1300543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- G. Prasanna
- Molecular Biophysics Laboratory, School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamilnadu 613401, India
| | - N. Hari
- NMR Laboratory, School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamilnadu 613401, India
| | - N.T. Saraswathi
- Molecular Biophysics Laboratory, School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamilnadu 613401, India
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Alim Z, Kilinc N, Sengul B, Beydemir S. Mechanism of capsaicin inhibition of aldose reductase activity. J Biochem Mol Toxicol 2017; 31. [DOI: 10.1002/jbt.21898] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/20/2016] [Accepted: 12/22/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Zuhal Alim
- Department of Chemistry, Faculty of Science and Arts; Ahi Evran University; 40000 Kırşehir Turkey
| | - Namık Kilinc
- Department of Medical Services and Techniques, Vocational School of Health Service; Iğdır University; 76000 Iğdır Turkey
| | - Bulent Sengul
- Department of Health Care Service, Vocational School of Health Service; Bayburt University; 69000 Bayburt Turkey
| | - Sukru Beydemir
- Department of Chemistry, Faculty of Sciences; Atatürk University; 25240 Erzurum Turkey
- Department of Biochemistry, Faculty of Pharmacy; Anadolu University; 26470 Eskişehir Turkey
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Linolenic acid prevents early and advanced glycation end-products (AGEs) modification of albumin. Int J Biol Macromol 2017; 95:121-125. [DOI: 10.1016/j.ijbiomac.2016.11.035] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 07/08/2016] [Accepted: 11/10/2016] [Indexed: 02/01/2023]
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Yeh WJ, Hsia SM, Lee WH, Wu CH. Polyphenols with antiglycation activity and mechanisms of action: A review of recent findings. J Food Drug Anal 2017; 25:84-92. [PMID: 28911546 PMCID: PMC9333423 DOI: 10.1016/j.jfda.2016.10.017] [Citation(s) in RCA: 196] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 10/06/2016] [Accepted: 10/12/2016] [Indexed: 10/28/2022] Open
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Hafsa J, Hammi KM, Khedher MRB, Smach MA, Charfeddine B, Limem K, Majdoub H. Inhibition of protein glycation, antioxidant and antiproliferative activities of Carpobrotus edulis extracts. Biomed Pharmacother 2016; 84:1496-1503. [PMID: 27876336 DOI: 10.1016/j.biopha.2016.11.046] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 11/02/2016] [Accepted: 11/11/2016] [Indexed: 12/18/2022] Open
Abstract
Carpobrotus edulis is an important South African medicinal plants used as a food and therapeutic agent in traditional medicine. The aim of this study was to determine the phytochemical content, antioxidant, antiglycation and cytotoxic effect against Human Colon Cancer Cell Line (HCT-116) of aqueous and ethanol-water (1:1v/v) extracts of Carpobrotus edulis.The content of total phenolics and flavonoids in aqueous and ethanol-water extract were 151.99μg and 66.35μg gallic acid equivalents/mg of dry extract, and 38.84μg and 21.96μg quercetin/mg of dry extract, respectively. Furthermore, phenolic compositions analysis indicated the presence of seven majority compounds including sinapic acid, ferulic acid, luteolin7-o-glucoside, hyperoside, isoquercitrin, ellagic acid and isorhamnetin 3-O-rutinoside. The ethanol-water extract (100-1000μg/mL) showed better antioxidant activity than aqueous extract. Furthermore, Carpobrotus edulis extracts, especially ethanol-water extract significantly inhibited the formation of fluorescent advanced glycation end products, prevented oxidation-induced protein damage and exhibited a cytotoxic effect against HCT116 cells, with a significant decrease in cell viability after 24h of incubation. The results obtained suggest that the Carpobrotus edulis extracts could be used as an easily accessible source of natural antioxidants and as potential phytochemicals against protein glycation and colon cancer.
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Affiliation(s)
- Jawhar Hafsa
- Department of Biochemistry, Faculty of Medicine of Sousse, University of Sousse, 4002, Tunisie.
| | - Khaoula Mkadmini Hammi
- Laboratory of Medicinal and Aromatic Plants, Biotechnology Centre of BorjCedria (CBBC), BP 901, 2050 Hammam-Lif, Tunisie; Laboratory of interfaces and advanced materials, Faculty of Sciences of Monastir, University of Monastir, 5000, Tunisie
| | - Med Raâfet Ben Khedher
- Laboratory of Biochemistry, 'Nutrition, Functional Food and Vascular Health' Faculty of Medicine of Monastir, University of Monastir, 5000, Tunisie
| | - Med Ali Smach
- Department of Biochemistry, Faculty of Medicine of Sousse, University of Sousse, 4002, Tunisie
| | - Bassem Charfeddine
- Department of Biochemistry, Faculty of Medicine of Sousse, University of Sousse, 4002, Tunisie
| | - Khalifa Limem
- Department of Biochemistry, Faculty of Medicine of Sousse, University of Sousse, 4002, Tunisie
| | - Hatem Majdoub
- Laboratory of interfaces and advanced materials, Faculty of Sciences of Monastir, University of Monastir, 5000, Tunisie.
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Sadowska-Bartosz I, Bartosz G. Effect of glycation inhibitors on aging and age-related diseases. Mech Ageing Dev 2016; 160:1-18. [PMID: 27671971 DOI: 10.1016/j.mad.2016.09.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 06/30/2016] [Accepted: 09/21/2016] [Indexed: 02/07/2023]
Abstract
Vast evidence supports the view that glycation of proteins is one of the main factors contributing to aging and is an important element of etiopathology of age-related diseases, especially type 2 diabetes mellitus, cataract and neurodegenerative diseases. Counteracting glycation can therefore be a means of increasing both the lifespan and healthspan. In this review, accumulation of glycation products during aging is presented, pathophysiological effects of glycation are discussed and ways of attenuation of the effects of glycation are described, concentrating on prevention of glycation. The effects of glycation and glycation inhibitors on the course of selected age-related diseases, such as Alzheimer's disease, Parkinson's disease and cataract are also reviewed.
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Affiliation(s)
- Izabela Sadowska-Bartosz
- Department of Biochemistry and Cell Biology, Faculty of Biology and Agriculture, University of Rzeszow, Zelwerowicza St. 4, 35-604 Rzeszów, Poland.
| | - Grzegorz Bartosz
- Department of Biochemistry and Cell Biology, Faculty of Biology and Agriculture, University of Rzeszow, Zelwerowicza St. 4, 35-604 Rzeszów, Poland; Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 90-236 Lodz, Poland
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Matafome P, Rodrigues T, Sena C, Seiça R. Methylglyoxal in Metabolic Disorders: Facts, Myths, and Promises. Med Res Rev 2016; 37:368-403. [DOI: 10.1002/med.21410] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/07/2016] [Accepted: 08/12/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Paulo Matafome
- Laboratory of Physiology, Institute of Biomedical Imaging and Life Sciences (IBILI); Faculty of Medicine, University of Coimbra; 3000-548 Coimbra Portugal
- Department of Complementary Sciences; Coimbra Health School (ESTeSC); Instituto Politécnico de Coimbra; 3045-601 Coimbra Portugal
| | - Tiago Rodrigues
- Laboratory of Physiology, Institute of Biomedical Imaging and Life Sciences (IBILI); Faculty of Medicine, University of Coimbra; 3000-548 Coimbra Portugal
| | - Cristina Sena
- Laboratory of Physiology, Institute of Biomedical Imaging and Life Sciences (IBILI); Faculty of Medicine, University of Coimbra; 3000-548 Coimbra Portugal
| | - Raquel Seiça
- Laboratory of Physiology, Institute of Biomedical Imaging and Life Sciences (IBILI); Faculty of Medicine, University of Coimbra; 3000-548 Coimbra Portugal
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Taghavi F, Habibi-Rezaei M, Bohlooli M, Farhadi M, Goodarzi M, Movaghati S, Maghami P, Taghibiglou C, Amanlou M, Haertlé T, Moosavi-Movahedi A. Antiamyloidogenic Effects of Ellagic Acid on Human Serum Albumin Fibril Formation Induced by Potassium Sorbate and Glucose. J Mol Recognit 2016; 29:611-618. [DOI: 10.1002/jmr.2560] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 06/20/2016] [Accepted: 07/13/2016] [Indexed: 02/02/2023]
Affiliation(s)
- F. Taghavi
- Institute of Biochemistry and Biophysics; University of Tehran; Tehran Iran
- Faculty of Biological Science; Tarbiat Modares University; Tehran Iran
| | | | - M. Bohlooli
- Institute of Biochemistry and Biophysics; University of Tehran; Tehran Iran
- School of Science; University of Zabol; Zabol Iran
| | - M. Farhadi
- ENT-HNS Research Center; IRAN University of Medical Sciences (IUMS); Tehran Iran
| | - M. Goodarzi
- Institute of Biochemistry and Biophysics; University of Tehran; Tehran Iran
| | - S. Movaghati
- Institute of Biochemistry and Biophysics; University of Tehran; Tehran Iran
| | - P. Maghami
- Institute of Biochemistry and Biophysics; University of Tehran; Tehran Iran
| | - C. Taghibiglou
- Department of Pharmacology, College of Medicine; University of Saskatchewan; Saskatchewan Canada
| | - M. Amanlou
- Department of Medicinal Chemistry, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
| | - T. Haertlé
- UR 1268 Biopolymères Interactions Assemblages; INRA, équipe Fonctions et Interactions des Protéines; Nantes France
- Department of Animal Nutrition and Feed Management; Poznan University of Life Sciences; Poznań Poland
| | - A.A. Moosavi-Movahedi
- Institute of Biochemistry and Biophysics; University of Tehran; Tehran Iran
- Center of Excellence in Biothermodynamics; University of Tehran; Tehran Iran
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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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Raghu G, Jakhotia S, Yadagiri Reddy P, Anil Kumar P, Bhanuprakash Reddy G. Ellagic acid inhibits non-enzymatic glycation and prevents proteinuria in diabetic rats. Food Funct 2016; 7:1574-83. [DOI: 10.1039/c5fo01372k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The formation of advanced glycation end products (AGEs) is a characteristic feature of diabetic tissues and accumulation of AGEs been implicated in the pathogenesis of diabetic nephropathy (DN). Ellagic acid prevented the accumulation of AGEs and in turn ameliorated proteinurea in diabetic rats.
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Affiliation(s)
- G. Raghu
- National Institute of Nutrition
- Hyderabad
- India
| | | | | | - P. Anil Kumar
- Department of Biochemistry
- University of Hyderabad
- Hyderabad
- India
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Kumagai Y, Nakatani S, Onodera H, Nagatomo A, Nishida N, Matsuura Y, Kobata K, Wada M. Anti-Glycation Effects of Pomegranate (Punica granatum L.) Fruit Extract and Its Components in Vivo and in Vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:7760-7764. [PMID: 26242637 DOI: 10.1021/acs.jafc.5b02766] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Accumulation of advanced glycation end products (AGEs) leads to various diseases such as diabetic complications and arteriosclerosis. In this study, we examined the effect of pomegranate fruit extract (PFE) and its constituent polyphenols on AGE formation in vivo and in vitro. PFE, fed with a high-fat and high-sucrose (HFS) diet to KK-A(y) mice, significantly reduced glycation products such as glycoalbumin (22.0 ± 2.4%), hemoglobin A1c (5.84 ± 0.23%), and serum AGEs (8.22 ± 0.17 μg/mL), as compared to a control HFS group (30.6 ± 2.6%, 7.45 ± 0.12%, and 9.55 ± 0.17 μg/mL, respectively, P < 0.05). In antiglycation assays, PFE, punicalin, punicalagin, ellagic acid, and gallic acid suppressed the formation of AGEs from bovine serum albumin and sugars. In this study, we discuss the mechanism of the antiglycation effects of PFE and its components in vivo and in vitro.
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Affiliation(s)
- Yuya Kumagai
- Department of Pharmaceutial and Health Sciences, Faculty of Pharmaceutical Sciences, Josai University , Saitama, Japan
| | - Sachie Nakatani
- Department of Pharmaceutial and Health Sciences, Faculty of Pharmaceutical Sciences, Josai University , Saitama, Japan
| | - Hideaki Onodera
- Department of Pharmaceutial and Health Sciences, Faculty of Pharmaceutical Sciences, Josai University , Saitama, Japan
| | | | | | | | - Kenji Kobata
- Department of Pharmaceutial and Health Sciences, Faculty of Pharmaceutical Sciences, Josai University , Saitama, Japan
| | - Masahiro Wada
- Department of Pharmaceutial and Health Sciences, Faculty of Pharmaceutical Sciences, Josai University , Saitama, Japan
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Prasanna G, Saraswathi NT. Aspartic acid functions as carbonyl trapper to inhibit the formation of advanced glycation end products by chemical chaperone activity. J Biomol Struct Dyn 2015; 34:943-51. [PMID: 26325019 DOI: 10.1080/07391102.2015.1060160] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Advanced glycation end products (AGEs) were implicated in pathology of numerous diseases. In this study, we present the bioactivity of aspartic acid (Asp) to inhibit the AGEs. Hemoglobin and bovine serum albumin (BSA) were glycated with glucose, fructose, and ribose in the presence and absence of Asp (100-200 μM). HbA1c inhibition was investigated using human blood and characterized by micro-column ion exchange chromatography. The effect of methyl glyoxal (MG) on hemoglobin and BSA was evaluated by fluorescence spectroscopy and gel electrophoresis. The effect of MG on red blood cells morphology was characterized by scanning electron micrographs. Molecular docking was performed on BSA with Asp. Asp is capable of inhibiting the formation of fluorescent AGEs by reacting with the reducing sugars. The presence of Asp as supplement in whole blood reduced the HbA1c% from 8.8 to 6.1. The presence of MG showed an increase in fluorescence and the presence of Asp inhibited the glycation thereby the fluorescence was quenched. MG also affected the electrophoretic mobility of hemoglobin and BSA by forming high molecular weight aggregates. Normal RBCs showed typical biconcave shape. MG modified RBCs showed twisted and elongated shape whereas the presence of ASP tends to protect RBC from twisting. Asp interacted with arginine residues of bovine serum albumin particularly ARG 194, ARG 198, and ARG 217 thereby stabilized the protein complex. We conclude that Asp has dual functions as a chemical chaperone to stabilize protein and as a dicarbonyl trapper, and thereby it can prevent the complications caused by glycation.
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Affiliation(s)
- Govindarajan Prasanna
- a Molecular Biophysics Laboratory, School of Chemical and Biotechnology , SASTRA University , Thanjavur 613401 , India
| | - N T Saraswathi
- a Molecular Biophysics Laboratory, School of Chemical and Biotechnology , SASTRA University , Thanjavur 613401 , India
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Tupe R, Kulkarni A, Adeshara K, Sankhe N, Shaikh S, Dalal S, Bhosale S, Gaikwad S. Zinc inhibits glycation induced structural, functional modifications in albumin and protects erythrocytes from glycated albumin toxicity. Int J Biol Macromol 2015; 79:601-10. [DOI: 10.1016/j.ijbiomac.2015.05.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/09/2015] [Accepted: 05/12/2015] [Indexed: 12/27/2022]
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Perera HKI, Handuwalage CS. Analysis of glycation induced protein cross-linking inhibitory effects of some antidiabetic plants and spices. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 15:175. [PMID: 26055093 PMCID: PMC4459441 DOI: 10.1186/s12906-015-0689-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/21/2015] [Indexed: 12/19/2022]
Abstract
Background Protein cross-linking which occurs towards the latter part of protein glycation is implicated in the development of chronic diabetic complications. Glycation induced protein cross-linking inhibitory effects of nine antidiabetic plants and three spices were evaluated in this study using a novel, simple, electrophoresis based method. Methods Methanol extracts of thirteen plants including nine antidiabetic plants and three spices were used. Lysozyme and fructose were incubated at 37 °C in the presence or absence of different concentrations of plant extracts up to 31 days. Standard glycation inhibitor aminoguanidine and other appropriate controls were included. A recently established sodium dodecyl polyacrylamide gel electrophoresis (SDS-PAGE) method was used to detect the products of protein cross-linking in the incubation mixtures. Results High molecular weight protein products representing the dimer, trimer and tetramer of lysozyme were detected in the presence of fructose. Among the nine antidiabetic plants, seven showed glycation induced protein cross-linking inhibitory effects namely Ficus racemosa (FR) stem bark, Gymnema sylvestre (GS) leaves, Musa paradisiaca (MP) yam, Phyllanthus debilis (PD) whole plant, Phyllanthus emblica (PE) fruit, Pterocarpus marsupium (PM) latex and Tinospora cordifolia (TC) leaves. Inhibition observed with Coccinia grandis (CG) leaves and Strychnos potatorum (SP) seeds were much low. Leaves of Gymnema lactiferum (GL), the plant without known antidiabetic effects showed the lowest inhibition. All three spices namely Coriandrum sativum (CS) seeds, Cinnamomum zeylanicum (CZ) bark and Syzygium aromaticum (SA) flower buds showed cross-link inhibitory effects with higher effects in CS and SA. PD, PE, PM, CS and SA showed almost complete inhibition on the formation of cross-linking with 25 μg/ml extracts. Conclusions Methanol extracts of PD, PE, PM, CS and SA have shown promising inhibitory effects on glycation induced protein cross-linking. Electronic supplementary material The online version of this article (doi:10.1186/s12906-015-0689-1) contains supplementary material, which is available to authorized users.
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Reddy VS, Reddy GB. Role of crystallins in diabetic complications. Biochim Biophys Acta Gen Subj 2015; 1860:269-77. [PMID: 25988654 DOI: 10.1016/j.bbagen.2015.05.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 05/05/2015] [Accepted: 05/10/2015] [Indexed: 12/12/2022]
Abstract
BACKGROUND Crystallins are the major structural proteins of vertebrate eye lens responsible for maintaining the refractive index of the lens. However, recent studies suggest that they also have a functional significance in non-lenticular tissues. Prolonged uncontrolled diabetes results in the development of macro and microvascular complications that are the leading causes of morbidity and mortality in diabetic patients all over the world. SCOPE OF REVIEW Recent studies have shown that crystallins play an instrumental role in diabetes and its complications. Therefore, this review highlights the current data on the impact of chronic hyperglycemia on expression, distribution, glycation, phosphorylation, chaperone-like function and, anti-apoptotic activity of crystallins. Furthermore, we discussed the insights for developing therapeutic strategies for diabetic complications including natural agents, peptides, and pharmacological chaperones that modulate or mimic chaperone activity of α-crystallins. MAJOR CONCLUSIONS Upregulation of crystallins appears to be a common feature of chronic diabetes. Further, chronic hyperglycemia induces the glycation and phosphorylation of crystallins, mainly α-crystallins and thereby alters their properties. The disturbed interaction of αB-crystallin with various apoptotic mediators including Bax and caspases is also an important factor for increased cell death in diabetes. Numerous dietary agents, peptides, and chemical chaperones prevent apoptosis and the loss of chaperone activity in diabetes. GENERAL SIGNIFICANCE Understanding the role of crystallins will aid in developing therapeutic strategies for alleviating pathophysiological conditions such as protein aggregation, inflammation, oxidative stress and apoptosis associated with chronic complications of diabetes including cataract, retinopathy, and cardiomyopathy. This article is part of a Special Issue entitled Crystallin Biochemistry in Health and Disease.
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Affiliation(s)
- Vadde Sudhakar Reddy
- Biochemistry Division, National Institute of Nutrition, Hyderabad 500 007, India
| | - G Bhanuprakash Reddy
- Biochemistry Division, National Institute of Nutrition, Hyderabad 500 007, India.
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Abbas G, Al-Harrasi AS, Hussain H, Hussain J, Rashid R, Choudhary MI. Antiglycation therapy: Discovery of promising antiglycation agents for the management of diabetic complications. PHARMACEUTICAL BIOLOGY 2015; 54:198-206. [PMID: 25853955 DOI: 10.3109/13880209.2015.1028080] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT During diabetes mellitus, non-enzymatic reaction between amino groups of protein and carbonyl of reducing sugars (Millard reaction) is responsible for the major diabetic complications. Various efforts have been made to influence the process of protein glycation. OBJECTIVES This review article provides an extensive survey of various studies published in scientific literature to understand the process of protein glycation and its measurement. Moreover, evaluation and identification of potential inhibitors (antiglycation agents) of protein glycation from natural and synthetic sources and their mechanism of action in vitro and in vivo are also addressed. METHOD In this review article, the mechanism involved in the formation of advanced glycation end products (AGEs) is discussed, while in second and third parts, promising antiglycation agents of natural and synthetic sources have been reviewed, respectively. Finally, in vivo studies have been addressed. This review is mainly compiled from important databases such as Science, Direct, Chemical Abstracts, SciFinder, and PubMed. RESULTS During the last two decades, various attempts have been made to inhibit the process of protein glycation. New potent inhibitors of protein glycation belonging to different classes such as flavonoids, alkaloids, terpenes, benzenediol Schiff bases, substituted indol, and thio compounds have been identified. CONCLUSION Antiglycation therapy will be an effective strategy in future to prevent the formation of AGEs for the management of late diabetic complications Current review article highlighted various compounds of natural and synthetic origins identified previously to inhibit the protein glycation and formation of AGEs in vitro and in vivo.
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Affiliation(s)
- Ghulam Abbas
- a Department of Biological Sciences and Chemistry , University of Nizwa , Nizwa , Sultanate of Oman
- b UoN Chair of Oman's Medicinal Plants and Marine Natural Products, University of Nizwa , Nizwa , Sultanate of Oman
| | - Ahmed Sulaiman Al-Harrasi
- b UoN Chair of Oman's Medicinal Plants and Marine Natural Products, University of Nizwa , Nizwa , Sultanate of Oman
| | - Hidayat Hussain
- b UoN Chair of Oman's Medicinal Plants and Marine Natural Products, University of Nizwa , Nizwa , Sultanate of Oman
| | - Javid Hussain
- a Department of Biological Sciences and Chemistry , University of Nizwa , Nizwa , Sultanate of Oman
| | - Rehana Rashid
- c Department of Chemistry , COMSATS Institute of Information Technology , Abbottabad , Pakistan , and
| | - M Iqbal Choudhary
- d HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi , Karachi , Pakistan
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Prevention of protein glycation by natural compounds. Molecules 2015; 20:3309-34. [PMID: 25690291 PMCID: PMC6272653 DOI: 10.3390/molecules20023309] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 12/14/2022] Open
Abstract
Non-enzymatic protein glycosylation (glycation) contributes to many diseases and aging of organisms. It can be expected that inhibition of glycation may prolong the lifespan. The search for inhibitors of glycation, mainly using in vitro models, has identified natural compounds able to prevent glycation, especially polyphenols and other natural antioxidants. Extrapolation of results of in vitro studies on the in vivo situation is not straightforward due to differences in the conditions and mechanism of glycation, and bioavailability problems. Nevertheless, available data allow to postulate that enrichment of diet in natural anti-glycating agents may attenuate glycation and, in consequence, ageing.
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45
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Ellagic acid, an NF-κB inhibitor, ameliorates renal function in experimental diabetic nephropathy. Chem Biol Interact 2014; 219:64-75. [DOI: 10.1016/j.cbi.2014.05.011] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Revised: 05/13/2014] [Accepted: 05/18/2014] [Indexed: 12/18/2022]
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Protein glycation inhibitory activity and antioxidant capacity of clove extract. Journal of Food Science and Technology 2014; 52:3843-50. [PMID: 26028769 DOI: 10.1007/s13197-014-1452-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/01/2014] [Accepted: 06/16/2014] [Indexed: 12/13/2022]
Abstract
Syzygium aromaticum (L.) (clove) is one of the most widely cultivated spices in many tropical countries. The aim of this study was to determine the phytochemical content, the antioxidant properties and the antiglycation properties of aqueous extract of clove against fructose-mediated protein glycation and oxidation. The result showed that the content of total phenolics and flavonoids in clove extract was 239.58 ± 0.70 mg gallic acid equivalents/g dried extract and 65.67 ± 0.01 mg catechin equivalents/g dried extract, respectively. In addition, clove exhibited antioxidant properties including DPPH radical scavenging activity (IC50 = 0.29 ± 0.01 mg/ml), Trolox equivalent antioxidant capacity (4.69 ± 0.03 μmol Trolox equivalents/mg dried extract), ferric reducing antioxidant power (20.55 ± 0.11 μmol ascorbic acid equivalents/mg dried extract), Oxygen radical absorbance capacity (31.12 ± 0.21 μmol Trolox equivalents/mg dried extract), hydroxyl radical scavenging activity (0.15 ± 0.04 mg Trolox equivalents/mg dried extract), and superoxide radical scavenging activity (18.82 ± 0.50 mg Trolox equivalents/mg dried extract). The aqueous extract of clove (0.25-1.00 mg/ml) significantly inhibited the formation of fluorescent advanced glycation end products (AGEs) and non-fluorescent AGEs (N(ɛ)-(carboxymethyl) lysine (CML)) in glycated BSA during 4 weeks of incubation. The extract also markedly prevented oxidation-induced protein damage by decreasing protein carbonyl formation and protecting against the loss of protein thiol group. These results clearly demonstrated that a polyphenol enriched clove extract, owing to its antioxidant, was capable to inhibit the formation of AGEs and protein glycation. The findings might lead to the possibility of using the clove extract for targeting diabetic complications.
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Emerging role of advanced glycation-end products (AGEs) in the pathobiology of eye diseases. Prog Retin Eye Res 2014; 42:85-102. [PMID: 24905859 DOI: 10.1016/j.preteyeres.2014.05.002] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/20/2014] [Accepted: 05/24/2014] [Indexed: 12/27/2022]
Abstract
Advanced glycation end products (AGEs) have been implicated in vision loss associated with macula degeneration, cataract formation, diabetic retinopathy and glaucoma. This pathogenic potential is mainly attributed to their accumulation in ocular tissues where they mediate aberrant crosslinking of extracellular matrix proteins and disruption of endothelial junctional complexes that affects cell permeability, mediates angiogenesis and breakdown of the inner blood-retinal barrier. Furthermore, AGEs severely affect cellular metabolism by disrupting ATP production, enhancing oxidative stress and modulating gene expression of anti-angiogenic and anti-inflammatory genes. Elucidation of AGE-induced mechanisms of action in different eye compartments will help in the understanding of the complex cellular and molecular processes associated with eye diseases. Several pharmaceutical agents with anti-glycating and anti-oxidant properties as well as AGE crosslink 'breakers' have been currently applied to eye diseases. The role of diet and the beneficial effects of certain nutriceuticals provide an alternative way to manage chronic visual disorders that affect the quality of life of millions of people.
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Ha JH, Shil PK, Zhu P, Gu L, Li Q, Chung S. Ocular inflammation and endoplasmic reticulum stress are attenuated by supplementation with grape polyphenols in human retinal pigmented epithelium cells and in C57BL/6 mice. J Nutr 2014; 144:799-806. [PMID: 24699803 PMCID: PMC6611528 DOI: 10.3945/jn.113.186957] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Inflammation and endoplasmic reticulum (ER) stress are common denominators for vision-threatening diseases such as diabetic retinopathy and age-related macular degeneration. Based on our previous study, supplementation with muscadine grape polyphenols (MGPs) alleviated systemic insulin resistance and proinflammatory responses. In this study, we hypothesized that MGPs would also be effective in attenuating ocular inflammation and ER stress. We tested this hypothesis using the human retinal pigmented epithelium (ARPE-19) cells and C57BL/6 mice. In ARPE-19 cells, tumor necrosis factor-α-induced proinflammatory gene expression of interleukin (IL)-1β, IL-6, and monocyte chemotactic protein-1 was decreased by 35.0%, 68.8%, and 62.5%, respectively, with MGP pretreatment, which was primarily due to the diminished mitogen-activated protein kinase activation and subsequent reduction of nuclear factor κ-B activation. Consistently, acute ocular inflammation and leukocyte infiltration were almost completely dampened (>95%) by MGP supplementation (100-200 mg/kg body weight) in C57BL/6 mice. Moreover, MGPs reduced inflammation-mediated loss of tight junctions and retinal permeability. To further investigate the protective roles of MGPs against ER stress, ARPE-19 cells were stimulated with thapsigargin. Pretreatment with MGPs significantly decreased the following: 1) ER stress-mediated vascular endothelial growth factor secretion (3.47 ± 0.06 vs. 1.58 ± 0.02 μg/L, P < 0.0001), 2) unfolded protein response, and 3) early apoptotic cell death (64.4 ± 6.85 vs. 33.7 ± 4.32%, P = 0.0003). Collectively, we have demonstrated that MGP is effective in attenuating ocular inflammation and ER stress. Our work also suggests that MGP may provide a novel dietary strategy to prevent vision-threatening retinal diseases.
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Affiliation(s)
- Jung-Heun Ha
- Department of Food Science and Human Nutrition, University of Florida,
Gainesville, FL
| | | | - Ping Zhu
- Department of Ophthalmology, University of Florida, Gainesville, FL
| | - Liwei Gu
- Department of Food Science and Human Nutrition, University of Florida,
Gainesville, FL
| | - Qiuhong Li
- Department of Ophthalmology, University of Florida, Gainesville, FL
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Pielesz A, Paluch J. Fucoidan as an inhibitor of thermally induced collagen glycation examined by acetate electrophoresis. Electrophoresis 2014; 35:2237-44. [PMID: 24853731 DOI: 10.1002/elps.201400178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 04/30/2014] [Accepted: 05/14/2014] [Indexed: 12/15/2022]
Abstract
Non-enzymatic glycation (Maillard reaction) in vitro could be a simple method to obtain glycoconjugates for studying their biological properties. Hence, fucoidan was retained by acetate electrophoresis indicating a strong interaction with the protein. A loss of colour in fucoidan bands was found for samples incubated with collagen as compared with samples of free fucoidan. Also under in vitro conditions at 100°C - simulating a sudden burn incident - fucoidan binds with collagen as a result of the Maillard reaction. In contrast, the colour of the fucoidan bands intensified for samples incubated with collagen, with the addition of glucose. Electrophoretic analyses were carried out after heating the samples to a temperature simulating a burn incident. The bands were found to intensify for samples incubated with collagen during a 30-day-long incubation. Thus, spontaneous in vitro glycation - i.e. without the addition of glucose - was confirmed. This process is highly intensified both by the temperature and time of incubation. For a sample incubated in vitro in a fucoidan solution containing glucose, glycation was confirmed in a preliminary FTIR and acetate electrophoresis examinations, occurring in collagen obtained from chicken skins. In particular, a new band emerging around 1746 cm(-1) was observed for above samples, as was its increasing intensity, as compared with samples without the addition of glucose. In the collagen glycation assay, while glucose reacts with collagen and forms cross-linked aggregates, fucoidan decreases the process of aggregation and recovery of native collagen.
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Affiliation(s)
- Anna Pielesz
- Faculty of Materials and Environment Sciences, University of Bielsko-Biała, Bielsko-Biała, Poland
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Dorsey PG, Greenspan P. Inhibition of nonenzymatic protein glycation by pomegranate and other fruit juices. J Med Food 2014; 17:447-54. [PMID: 24433074 DOI: 10.1089/jmf.2013.0075] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The nonenzymatic glycation of proteins and the formation of advanced glycation endproducts in diabetes leads to the crosslinking of proteins and disease complications. Our study sought to demonstrate the effect of commonly consumed juices (pomegranate, cranberry, black cherry, pineapple, apple, and Concord grape) on the fructose-mediated glycation of albumin. Albumin glycation decreased by 98% in the presence of 10 μL of pomegranate juice/mL; other juices inhibited glycation by only 20%. Pomegranate juice produced the greatest inhibition on protein glycation when incubated at both the same phenolic concentration and the same antioxidant potential. Both punicalagin and ellagic acid significantly inhibited the glycation of albumin by ~90% at 5 μg/mL. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed that pomegranate, but not apple juice, protected albumin from modification. These results demonstrate that pomegranate juice and two of its major constituents are potent inhibitors of fructose-mediated protein glycation.
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Affiliation(s)
- Pamela Garner Dorsey
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia , Athens, Georgia, USA
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