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Bosbach C, Gatzemeier LM, Bloch von Blottnitz KI, König A, Diederichsen U, Steinem C, Outeiro TF. Chemical synthesis of site-selective advanced glycation end products in α-synuclein and its fragments. Org Biomol Chem 2024; 22:2670-2676. [PMID: 38483440 DOI: 10.1039/d4ob00225c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Advanced glycation end products (AGEs) arise from the Maillard reaction between dicarbonyls and proteins, nucleic acids, or specific lipids. Notably, AGEs are linked to aging and implicated in various disorders, spanning from cancer to neurodegenerative diseases. While dicarbonyls like methylglyoxal preferentially target arginine residues, lysine-derived AGEs, such as N(6)-(1-carboxymethyl)lysine (CML) and N(6)-(1-carboxyethyl)lysine (CEL), are also abundant. Predicting protein glycation in vivo proves challenging due to the intricate nature of glycation reactions. In vitro, glycation is difficult to control, especially in proteins that harbor multiple glycation-prone amino acids. α-Synuclein (aSyn), pivotal in Parkinson's disease and synucleinopathies, has 15 lysine residues and is known to become glycated at multiple lysine sites. To understand the influence of glycation in specific regions of aSyn on its behavior, a strategy for site-specific glycated protein production is imperative. To fulfill this demand, we devised a synthetic route integrating solid-phase peptide synthesis, orthogonal protection of amino acid side-chain functionalities, and reductive amination strategies. This methodology yielded two disease-related N-terminal peptide fragments, each featuring five and six CML and CEL modifications, alongside a full-length aSyn protein containing a site-selective E46CEL modification. Our synthetic approach facilitates the broad introduction of glycation motifs at specific sites, providing a foundation for generating glycated forms of synucleinopathy-related and other disease-relevant proteins.
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Affiliation(s)
- Clara Bosbach
- Institute of Organic and Biomolecular Chemistry, Georg-August-University Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Waldweg 33, 37073 Göttingen, Germany.
| | - Luisa Maria Gatzemeier
- Institute of Organic and Biomolecular Chemistry, Georg-August-University Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Waldweg 33, 37073 Göttingen, Germany.
| | - Katja Ilme Bloch von Blottnitz
- Institute of Organic and Biomolecular Chemistry, Georg-August-University Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Annekatrin König
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Waldweg 33, 37073 Göttingen, Germany.
| | - Ulf Diederichsen
- Institute of Organic and Biomolecular Chemistry, Georg-August-University Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Claudia Steinem
- Institute of Organic and Biomolecular Chemistry, Georg-August-University Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Tiago Fleming Outeiro
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Waldweg 33, 37073 Göttingen, Germany.
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Framlington Place, Newcastle Upon Tyne, NE2 4HH, UK
- Max Planck Institute for Multidisciplinary Sciences, Hermann-Rein-Straße 3, 37075 Göttingen, Germany
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2
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Ravi R, Nagarajan H, Muralikumar S, Vetrivel U, Subramaniam Rajesh B. Unveiling the therapeutic potential of a mutated paraoxonase 2 in diabetic retinopathy: Defying glycation, mitigating oxidative stress, ER stress and inflammation. Int J Biol Macromol 2024; 258:128899. [PMID: 38141706 DOI: 10.1016/j.ijbiomac.2023.128899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 11/20/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
Paraoxonase 2 (PON2) is an intracellular anti-oxidant protein ubiquitously expressed in all cells and reduces reactive oxygen species, endoplasmic reticulum (ER) stress, further improves mitochondrial function and thereby shows anti-apoptotic function. In diabetes and its complications this PON gets glycated and becomes in effective. The PON activity is reported to be reduced in diabetic retinopathy and we have earlier showed Carboxy methyl lysine (AGE) decreased PON2 expression and activity in Human retinal endothelial cells (HREC) . In this study, we have designed and developed a mutated PON2 by in silico and in vitro approach which can resist glycation. Where in glycation-prone residues in PON2 was predicted using in silico analyses and a mutated PON2 was developed using in vitro site directed mutagenesis (SDM) assay mPON2 (mutant PON2-PON2-K70A) and its efficacy was compared with wPON2 (wild type PON2). CML glycated wPON2 and reduced its activity when compared with mPON2 in HREC confirmed by immunoprecipitation and in vitro experiments. Additionally, mPON2 interaction efficiency with its substrates was higher than wPON2 by insilico assay and demonstrated enhanced inhibition against CML-induced oxidative stress, ER stress, pro-inflammation, and mitochondrial fission than wPON2 by invitro assay. Further mPON2 showed increased inhibition of phosphorylation of NFĸB induced by CML. Our investigation establishes that the over expression of mPON2 in HREC can defy glycation and therefore mitigate ER stress and inflammation against CML than endogenous wPON2. These findings imply that mPON2 can be a beneficial therapeutic target against diabetic retinopathy.
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Affiliation(s)
- Ramya Ravi
- R.S. Mehta Jain Department of Biochemistry and Cell Biology, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai 600006, India; School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Hemavathy Nagarajan
- Centre for Bioinformatics, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai 600006, India
| | - Shalini Muralikumar
- Centre for Bioinformatics, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai 600006, India
| | - Umashankar Vetrivel
- Centre for Bioinformatics, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai 600006, India; Department of Bioinformatics, ICMR-National Institute of Traditional Medicine, Nehru Nagar, Belagavi, Karnataka 590 010, India
| | - Bharathidevi Subramaniam Rajesh
- R.S. Mehta Jain Department of Biochemistry and Cell Biology, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai 600006, India.
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3
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Yang B, Zhang Z, Liu L, Li Z, Lin H. Investigation of the allergenicity alterations of shrimp tropomyosin as glycated by glucose and maltotriose containing advanced glycation end products. Food Funct 2023; 14:10941-10954. [PMID: 38009324 DOI: 10.1039/d3fo04440h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Tropomyosin (TM) is the major allergen in shrimp that is known to be the primary trigger for shrimp-induced food allergy. Our previous reports suggest that glycation could reduce the allergenicity of TM and the reduction of allergenicity is largely dependent on the sources of saccharides. This investigation aimed to investigate the glycation of TM by glucose and maltotriose as well as the effects of glycation on the allergenicity of TM. Compared to TM, the IgG-binding capacity and IgE-binding capacity of tropomyosin glycated by glucose (TM-G) was greatly reduced with a longer glycation time, the release of allergic mediators from RBL-2H3 mast cells was reduced in a time-dependent manner, and weaker allergic reactions were induced in BALB/c mice. Conversely, tropomyosin glycated by maltotriose (TM-MTS) exhibited a stronger allergenicity after 48 hours of glycation due to the generation of neoallergens that were derived from the advanced glycation end products (AGEs). In conclusion, glucose could be used to desensitize the shrimp TM-induced food allergy via glycation, which could significantly reduce the allergenicity and alleviate allergic symptoms. This work could provide a novel approach to reduce the allergenicity of shrimp tropomyosin and prevent the shrimp tropomyosin-induced food allergy.
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Affiliation(s)
- Bin Yang
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
| | - Ziye Zhang
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
| | - Lichun Liu
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
| | - Zhenxing Li
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
| | - Hong Lin
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
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Mossine VV, Mawhinney TP. 1-Amino-1-deoxy-d-fructose ("fructosamine") and its derivatives. Adv Carbohydr Chem Biochem 2023; 83:27-132. [PMID: 37968038 DOI: 10.1016/bs.accb.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Fructosamine has long been considered as a key intermediate of the Maillard reaction, which to a large extent is responsible for specific aroma, taste, and color formation in thermally processed or dehydrated foods. Since the 1980s, however, as a product of the Amadori rearrangement reaction between glucose and biologically significant amines such as proteins, fructosamine has experienced a boom in biomedical research, mainly due to its relevance to pathologies in diabetes and aging. In this chapter, we assess the scope of the knowledge on and applications of fructosamine-related molecules in chemistry, food, and health sciences, as reflected mostly in publications within the past decade. Methods of fructosamine synthesis and analysis, its chemical, and biological properties, and degradation reactions, together with fructosamine-modifying and -recognizing proteins are surveyed.
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Affiliation(s)
- Valeri V Mossine
- Department of Biochemistry, University of Missouri, Columbia, MO, United States
| | - Thomas P Mawhinney
- Department of Biochemistry, University of Missouri, Columbia, MO, United States.
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Ediga HH, Hester P, Yepuri A, Reddy GB, Madala SK. Nε-Carboxymethyl-Lysine Modification of Extracellular Matrix Proteins Augments Fibroblast Activation. Int J Mol Sci 2023; 24:15811. [PMID: 37958795 PMCID: PMC10650592 DOI: 10.3390/ijms242115811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/24/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023] Open
Abstract
The extracellular matrix (ECM) is a dynamic complex protein network that provides structural integrity and plays an active role in shaping fibroblast behavior both in health and disease. Despite its essential functions, the impact of age-associated post-translational modifications on ECM-driven fibroblast activities such as proliferation, survival, fibroblast-to-myofibroblast transformation (FMT), and extracellular matrix production remains largely unknown. Nε-carboxymethyl-lysine (CML) is one of the well-characterized advanced glycation end-products (AGEs) that can occur on lysine residues within ECM proteins through non-enzymatic glycation. In this study, we determined the accumulation and the effects of the CML-modified ECM (CML-ECM) on fibroblast activation. Immunostainings and immunoblot analysis demonstrated significant increases in CML-AGE content in idiopathic pulmonary fibrosis (IPF) compared to age-matched healthy lungs. Gene expression analysis and fibroblast activation assays collectively implicate the ECM as a negative regulator of fibroblast activation. Notably, the CML modification of the ECM resulted in a significant decrease in its anti-fibrotic effects including proliferation, FMT, apoptosis, and ECM production. Together, the results of this study revealed an unexplored pathological role played by the CML-ECM on fibroblast activation, which has wide implications in IPF and other fibrotic diseases.
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Affiliation(s)
- Harshavardhana H. Ediga
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267-0564, USA (P.H.)
- Department of Biochemistry, ICMR-National Institute of Nutrition, Hyderabad 500007, India;
| | - Patrick Hester
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267-0564, USA (P.H.)
| | - Adithi Yepuri
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267-0564, USA (P.H.)
| | | | - Satish K. Madala
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267-0564, USA (P.H.)
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Chang TY, Lan KC, Wu CH, Sheu ML, Yang RS, Liu SH. Nε-(1-Carboxymethyl)-L-lysine, an advanced glycation end product, exerts malignancy on chondrosarcoma via the activation of cancer stemness. Arch Toxicol 2023; 97:2231-2244. [PMID: 37314482 DOI: 10.1007/s00204-023-03539-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 06/06/2023] [Indexed: 06/15/2023]
Abstract
Despite epidemiological evidence that suggests diabetes mellitus is a risk factor for cancer, the link between diabetes mellitus and primary bone cancer is rarely discussed. Chondrosarcomas are primary malignant cartilage tumors with poor prognosis and high metastatic potential. It remains unclear whether hyperglycemia affects the stemness and malignancy of chondrosarcoma cells. Nε-(1-Carboxymethyl)-L-lysine (CML), an advanced glycation end product (AGE), is a major immunological epitope detected in the tissue proteins of diabetic patients. We hypothesized that CML could enhance cancer stemness in chondrosarcoma cells. CML enhanced tumor-sphere formation and the expression of cancer stem cell markers in human chondrosarcoma cell lines. Migration and invasion ability and the epithelial-mesenchymal transition (EMT) process were also induced by CML treatment. Moreover, CML increased the protein expression levels of the receptor for AGE (RAGE), phosphorylated NFκB-p65, and decreased the phosphorylation of AKT and GSK-3. We also found that hyperglycemia with high CML levels facilitated tumor metastasis, whereas tumor growth was not affected in the streptozotocin (STZ)-induced diabetic NOD/SCID tumor xenograft mouse models. Our results indicate that CML enhances chondrosarcoma stemness and metastasis, which may reveal the relationship between AGE and bone cancer metastasis.
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Affiliation(s)
- Ting-Yu Chang
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kuo-Cheng Lan
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chia-Hung Wu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Meei-Ling Sheu
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan
- Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Rong-Sen Yang
- Department of Orthopedics, National Taiwan University Hospital, Taipei, Taiwan
| | - Shing-Hwa Liu
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
- Department of Pediatrics, College of Medicine, National Taiwan University & Hospital, Taipei, Taiwan.
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7
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Kingsbury KD, Skeie JM, Cosert K, Schmidt GA, Aldrich BT, Sales CS, Weller J, Kruse F, Thomasy SM, Schlötzer-Schrehardt U, Greiner MA. Type II Diabetes Mellitus Causes Extracellular Matrix Alterations in the Posterior Cornea That Increase Graft Thickness and Rigidity. Invest Ophthalmol Vis Sci 2023; 64:26. [PMID: 37326594 DOI: 10.1167/iovs.64.7.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023] Open
Abstract
Purpose There is a pressing need to investigate the impact of type II diabetes mellitus on the posterior cornea in donor tissues given its increasing prevalence and potential impact on endothelial keratoplasty surgical outcomes. Methods Immortalized human cultured corneal endothelial cells (CECs; HCEC-B4G12) were grown in hyperglycemic media for 2 weeks. Extracellular matrix (ECM) adhesive glycoprotein expression and advanced glycation end products (AGEs) in cultured cells and corneoscleral donor tissues, as well as the elastic modulus for the Descemet membrane (DMs) and CECs of diabetic and nondiabetic donor corneas, were measured. Results In CEC cultures, increasing hyperglycemia resulted in increased transforming growth factor beta-induced (TGFBI) protein expression and colocalization with AGEs in the ECM. In donor corneas, the thicknesses of the DM and the interfacial matrix (IFM) between the DM and stroma both increased from 8.42 ± 1.35 µm and 0.504 ± 0.13 µm in normal corneas, respectively, to 11.13 ± 2.91 µm (DM) and 0.681 ± 0.24 µm (IFM) in non-advanced diabetes (P = 0.013 and P = 0.075, respectively) and 11.31 ± 1.76 µm (DM) and 0.744 ± 0.18 µm (IFM) in advanced diabetes (AD; P = 0.0002 and P = 0.003, respectively). Immunofluorescence in AD tissues versus controls showed increased AGEs (P < 0.001) and markedly increased labeling intensity for adhesive glycoproteins, including TGFBI, that colocalized with AGEs. The elastic modulus significantly increased between AD and control tissues for the DMs (P < 0.0001) and CECs (P < 0.0001). Conclusions Diabetes and hyperglycemia alter human CEC ECM structure and composition, likely contributing to previously documented complications of endothelial keratoplasty using diabetic donor tissue, including tearing during graft preparation and reduced graft survival. AGE accumulation in the DM and IFM may be a useful biomarker for determining diabetic impact on posterior corneal tissue.
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Affiliation(s)
- Kenten D Kingsbury
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States
- Iowa Lions Eye Bank, Coralville, Iowa, United States
| | - Jessica M Skeie
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States
- Iowa Lions Eye Bank, Coralville, Iowa, United States
| | - Krista Cosert
- Department of Surgical & Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, California, United States
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, Davis, California, United States
| | | | - Benjamin T Aldrich
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States
- Iowa Lions Eye Bank, Coralville, Iowa, United States
| | - Christopher S Sales
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States
- Iowa Lions Eye Bank, Coralville, Iowa, United States
| | - Julia Weller
- Department of Ophthalmology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Friedrich Kruse
- Department of Ophthalmology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Sara M Thomasy
- Department of Surgical & Radiological Sciences, School of Veterinary Medicine, University of California, Davis, Davis, California, United States
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, Davis, California, United States
| | | | - Mark A Greiner
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States
- Iowa Lions Eye Bank, Coralville, Iowa, United States
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Kim Y. Blood and Tissue Advanced Glycation End Products as Determinants of Cardiometabolic Disorders Focusing on Human Studies. Nutrients 2023; 15:nu15082002. [PMID: 37111220 PMCID: PMC10144557 DOI: 10.3390/nu15082002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 04/29/2023] Open
Abstract
Cardiometabolic disorders are characterised by a cluster of interactive risk determinants such as increases in blood glucose, lipids and body weight, as well as elevated inflammation and oxidative stress and gut microbiome changes. These disorders are associated with onset of type 2 diabetes mellitus (T2DM) and cardiovascular disease (CVD). T2DM is strongly associated with CVD. Dietary advanced glycation end products (dAGEs) attributable from modern diets high in sugar and/or fat, highly processed foods and high heat-treated foods can contribute to metabolic etiologies of cardiometabolic disorders. This mini review aims to determine whether blood dAGEs levels and tissue dAGEs levels are determinants of the prevalence of cardiometabolic disorders through recent human studies. ELISA (enzyme-linked immunosorbent assay), high-performance liquid chromatography (HPLC), liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS) for blood dAGEs measurement and skin auto fluorescence (SAF) for skin AGEs measurement can be used. Recent human studies support that a diet high in AGEs can negatively influence glucose control, body weight, blood lipid levels and vascular health through the elevated oxidative stress, inflammation, blood pressure and endothelial dysfunction compared with a diet low in AGEs. Limited human studies suggested a diet high in AGEs could negatively alter gut microbiota. SAF could be considered as one of the predictors affecting risks for cardiometabolic disorders. More intervention studies are needed to determine how dAGEs are associated with the prevalence of cardiometabolic disorders through gut microbiota changes. Further human studies are conducted to find the association between CVD events, CVD mortality and total mortality through SAF measurement, and a consensus on whether tissue dAGEs act as a predictor of CVD is required.
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Affiliation(s)
- Yoona Kim
- Department of Food and Nutrition, Institute of Agriculture and Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju 52828, Gyeongsangnam-do, Republic of Korea
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9
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Biomarkers of oxidative stress and reproductive complications. Adv Clin Chem 2023; 113:157-233. [PMID: 36858646 DOI: 10.1016/bs.acc.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Oxidative stress is the result of an imbalance between the formation of reactive oxygen species (ROS) and the levels of enzymatic and non-enzymatic antioxidants. The assessment of biological redox status is performed by the use of oxidative stress biomarkers. An oxidative stress biomarker is defined as any physical structure or process or chemical compound that can be assessed in a living being (in vivo) or in solid or fluid parts thereof (in vitro), the determination of which is a reproducible and reliable indicator of oxidative stress. The use of oxidative stress biomarkers allows early identification of the risk of developing diseases associated with this process and also opens up possibilities for new treatments. At the end of the last century, interest in oxidative stress biomarkers began to grow, due to evidence of the association between the generation of free radicals and various pathologies. Up to now, a significant number of studies have been carried out to identify and apply different oxidative stress biomarkers in clinical practice. Among the most important oxidative stress biomarkers, it can be mentioned the products of oxidative modifications of lipids, proteins, nucleic acids, and uric acid as well as the measurement of the total antioxidant capacity of fluids in the human body. In this review, we aim to present recent advances and current knowledge on the main biomarkers of oxidative stress, including the discovery of new biomarkers, with emphasis on the various reproductive complications associated with variations in oxidative stress levels.
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10
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Hagenhaus V, Gorenflos López JL, Rosenstengel R, Neu C, Hackenberger CPR, Celik A, Weinert K, Nguyen MB, Bork K, Horstkorte R, Gesper A. Glycation Interferes with the Activity of the Bi-Functional UDP- N-Acetylglucosamine 2-Epimerase/ N-Acetyl-mannosamine Kinase (GNE). Biomolecules 2023; 13:biom13030422. [PMID: 36979358 PMCID: PMC10046061 DOI: 10.3390/biom13030422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 03/30/2023] Open
Abstract
Mutations in the gene coding for the bi-functional UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase (GNE), the key enzyme of the sialic acid biosynthesis, are responsible for autosomal-recessive GNE myopathy (GNEM). GNEM is an adult-onset disease with a yet unknown exact pathophysiology. Since the protein appears to work adequately for a certain period of time even though the mutation is already present, other effects appear to influence the onset and progression of the disease. In this study, we want to investigate whether the late onset of GNEM is based on an age-related effect, e.g., the accumulation of post-translational modifications (PTMs). Furthermore, we also want to investigate what effect on the enzyme activity such an accumulation would have. We will particularly focus on glycation, which is a PTM through non-enzymatic reactions between the carbonyl groups (e.g., of methylglyoxal (MGO) or glyoxal (GO)) with amino groups of proteins or other biomolecules. It is already known that the levels of both MGO and GO increase with age. For our investigations, we express each domain of the GNE separately, treat them with one of the glycation agents, and determine their activity. We demonstrate that the enzymatic activity of the N-acetylmannosamine kinase (GNE-kinase domain) decreases dramatically after glycation with MGO or GO-with a remaining activity of 13% ± 5% (5 mM MGO) and 22% ± 4% (5 mM GO). Whereas the activity of the UDP-N-acetylglucosamine 2-epimerase (GNE-epimerase domain) is only slightly reduced after glycation-with a remaining activity of 60% ± 8% (5 mM MGO) and 63% ± 5% (5 mM GO).
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Affiliation(s)
- Vanessa Hagenhaus
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Jacob L Gorenflos López
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP), Campus Berlin-Buch, Robert-Roessle-Str. 10, 13125 Berlin, Germany
- Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
| | - Rebecca Rosenstengel
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Carolin Neu
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Christian P R Hackenberger
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP), Campus Berlin-Buch, Robert-Roessle-Str. 10, 13125 Berlin, Germany
- Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
| | - Arif Celik
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP), Campus Berlin-Buch, Robert-Roessle-Str. 10, 13125 Berlin, Germany
- Institut für Chemie, Humboldt Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
| | - Klara Weinert
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Mai-Binh Nguyen
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Kaya Bork
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Rüdiger Horstkorte
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
| | - Astrid Gesper
- Institute for Physiological Chemistry, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06114 Halle, Germany
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11
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RAGE Inhibitors for Targeted Therapy of Cancer: A Comprehensive Review. Int J Mol Sci 2022; 24:ijms24010266. [PMID: 36613714 PMCID: PMC9820344 DOI: 10.3390/ijms24010266] [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: 09/17/2022] [Revised: 10/28/2022] [Accepted: 12/16/2022] [Indexed: 12/28/2022] Open
Abstract
The receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin family that is overexpressed in several cancers. RAGE is highly expressed in the lung, and its expression increases proportionally at the site of inflammation. This receptor can bind a variety of ligands, including advanced glycation end products, high mobility group box 1, S100 proteins, adhesion molecules, complement components, advanced lipoxidation end products, lipopolysaccharides, and other molecules that mediate cellular responses related to acute and chronic inflammation. RAGE serves as an important node for the initiation and stimulation of cell stress and growth signaling mechanisms that promote carcinogenesis, tumor propagation, and metastatic potential. In this review, we discuss different aspects of RAGE and its prominent ligands implicated in cancer pathogenesis and describe current findings that provide insights into the significant role played by RAGE in cancer. Cancer development can be hindered by inhibiting the interaction of RAGE with its ligands, and this could provide an effective strategy for cancer treatment.
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12
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Yoshitake J, Shibata T, Chikazawa M, Uchida K. Autoxidation of ascorbate mediates lysine N-pyrrolation. Free Radic Res 2022; 56:749-759. [PMID: 36725333 DOI: 10.1080/10715762.2023.2174865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Protein N-pyrrolation, which converts lysine residues to Nε-pyrrole-l-lysine (pyrK), is a naturally occurring covalent modification. The pyrrolated proteins have a unique property of binding to DNA-staining agents, such as SYBR Green I (SG), and anti-DNA antibodies, suggesting a physiologically relevant modification that gives rise to DNA mimic protein. These properties of pyrrolated protein are suggested to be associated with innate and autoimmune responses. Short-chain aldehydes derived from lipid peroxidation are thought to be involved in the formation of pyrK. We now report that similar lysine N-pyrrolation also occurs during the metal-catalyzed oxidation of proteins with ascorbate. When human serum albumin (HSA) was incubated with Fe2+/ascorbate in the presence and absence of docosahexaenoic acid, the protein was converted to SG-binding proteins even without the polyunsaturated fatty acid. The formation of SG-binding proteins by Fe2+/ascorbate was accompanied by the formation of pyrK, which was also detected in ascorbate-treated hemoglobin. Moreover, the metal-catalyzed oxidation of ascorbate produced the pyrrolation factors, glycolaldehyde and glyoxal. These results and the observations that sera from autoimmune-prone MRL-lpr mice recognized modified proteins with Fe2+/ascorbate and with glycolaldehyde/glyoxal suggest that the autoxidation of ascorbate, as well as lipid peroxidation, can be a source of autoantigenic N-pyrrolated proteins. Our findings revealed a possible function of ascorbate as an endogenous source of pyrrolated proteins and suggested that the pyrK residues generated in proteins may play a role in the innate and autoimmune responses associated with the oxidative metabolism of ascorbate.
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Affiliation(s)
- Jun Yoshitake
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Nagoya, Japan
| | - Takahiro Shibata
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Nagoya, Japan.,Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Miho Chikazawa
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Koji Uchida
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.,Japan Agency for Medical Research and Development, CREST, Tokyo, Japan
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Zhu L, Tong G, Yang F, Zhao Y, Chen G. The role of neuroimmune and inflammation in pediatric uremia-induced neuropathy. Front Immunol 2022; 13:1013562. [PMID: 36189322 PMCID: PMC9520989 DOI: 10.3389/fimmu.2022.1013562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
Uremic neuropathy in children encompasses a wide range of central nervous system (CNS), peripheral nervous system (PNS), autonomic nervous system (ANS), and psychological abnormalities, which is associated with progressive renal dysfunction. Clinically, the diagnosis of uremic neuropathy in children is often made retrospectively when symptoms improve after dialysis or transplantation, due to there is no defining signs or laboratory and imaging findings. These neurological disorders consequently result in increased morbidity and mortality among children population, making uremia an urgent public health problem worldwide. In this review, we discuss the epidemiology, potential mechanisms, possible treatments, and the shortcomings of current research of uremic neuropathy in children. Mechanistically, the uremic neuropathy may be caused by retention of uremic solutes, increased oxidative stress, neurotransmitter imbalance, and disturbance of the blood-brain barrier (BBB). Neuroimmune, including the change of inflammatory factors and immune cells, may also play a crucial role in the progression of uremic neuropathy. Different from the invasive treatment of dialysis and kidney transplantation, intervention in neuroimmune and targeted anti-inflammatory therapy may provide a new insight for the treatment of uremia.
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Affiliation(s)
- Linfeng Zhu
- Department of Urology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Guoqin Tong
- Department of Neurology, The First People’s Hospital of XiaoShan District, Hangzhou, China
| | - Fan Yang
- Department of Urology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Yijun Zhao
- Department of Urology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Guangjie Chen
- Department of Urology, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
- *Correspondence: Guangjie Chen,
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Hashimoto M, Matsuzaki K, Maruyama K, Sumiyoshi E, Hossain S, Wakatsuki H, Kato S, Ohno M, Tanabe Y, Kuroda Y, Yamaguchi S, Kajima K, Ohizumi Y, Shido O. Perilla frutescens seed oil combined with Anredera cordifolia leaf powder attenuates age-related cognitive decline by reducing serum triglyceride and glucose levels in healthy elderly Japanese individuals: a possible supplement for brain health. Food Funct 2022; 13:7226-7239. [PMID: 35722977 DOI: 10.1039/d2fo00723a] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have shown that Anredera cordifolia extract improves learning and memory in a senescence-accelerated mouse model, and that α-linolenic acid (ALA)-rich Perilla frutescens seed oil (PO) improves brain function in healthy Japanese adults and elderly individuals. Herein, we present a 12-month, randomised, double-blind, parallel-armed intervention trial examining the effects of PO supplementation alone or in combination with A. cordifolia leaf powder on brain function in healthy elderly Japanese individuals. Participants were randomly divided into two groups: the PO group received 1.47 mL PO (0.88 g ALA) daily via soft gelatine capsules, and the POAC group received 1.47 mL PO and 1.12 g A. cordifolia leaf powder (1.46 mg vitexin and 1.12 mg adenosine) daily. After 12 months of intervention, the POAC group showed generally higher cognitive index scores than the PO group. The beneficial effects of combined supplementation on cognitive function were associated with increased ALA and eicosapentaenoic acid levels in red blood cell plasma membranes, increased serum biological antioxidant potential, and decreased serum triglyceride, glucose, and N-(epsilon)-carboxymethyl-lysine (CML), an advanced glycation end-product and biochemical marker of oxidative stress levels. The effects of combined supplementation on cognitive function also showed a significant negative correlation with serum CML levels after 12 months of intervention. Our findings suggest that combined long-term supplementation with PO and A. cordifolia more effectively ameliorates age-related cognitive decline than PO alone. These findings may serve as a basis for the development of new supplements for brain health. Clinical Trial Registry, UMIN000040863.
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Affiliation(s)
- Michio Hashimoto
- Department of Environmental Physiology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan.
| | - Kentaro Matsuzaki
- Department of Environmental Physiology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan.
| | | | - Eri Sumiyoshi
- Department of Environmental Physiology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan.
| | - Shahdat Hossain
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka, Bangladesh
| | - Harumi Wakatsuki
- Department of Environmental Physiology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan.
| | - Setsushi Kato
- Kato Hospital, Jinjukai Healthcare Corporation, Kawamoto, Shimane, Japan
| | - Miho Ohno
- Kato Hospital, Jinjukai Healthcare Corporation, Kawamoto, Shimane, Japan
| | - Yoko Tanabe
- Department of Environmental Physiology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan.
| | - Yoko Kuroda
- Department of Internal Medicine III, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan
| | | | - Koji Kajima
- Sankyo Holdings Co., Ltd, Fuji, Shizuoka, Japan
| | - Yasushi Ohizumi
- Kansei Fukushi Research Institute, Tohoku Fukushi University, Sendai, Miyagi, Japan
| | - Osamu Shido
- Department of Environmental Physiology, Faculty of Medicine, Shimane University, Izumo, Shimane, Japan.
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15
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Lyu JL, Liu YJ, Wen KC, Chiu CY, Lin YH, Chiang HM. Protective Effect of Djulis ( Chenopodium formosanum) Extract against UV- and AGEs-Induced Skin Aging via Alleviating Oxidative Stress and Collagen Degradation. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072332. [PMID: 35408731 PMCID: PMC9000422 DOI: 10.3390/molecules27072332] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 12/18/2022]
Abstract
Skin aging is a complex process involving photoaging and glycation stress, which share some fundamental pathways and have common mediators. They can cause skin damage and collagen degradation by inducing oxidative stress and the accumulation of reactive oxygen species (ROS). Chenopodium formosanum (CF), also known as Djulis, is a traditional cereal in Taiwan. This study investigated the protection mechanisms of CF extract against ultraviolet (UV) radiation and advanced glycation end products (AGEs)-induced stress. The results indicated that CF extract had strong antioxidant and free radical scavenging effects. It could reduce UV-induced intracellular ROS generation and initiate the antioxidant defense system by activating the nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) signaling pathway in human skin fibroblasts. CF extract modulated mitogen-activated protein kinase (MAPK) and transformed growth factor-beta (TGF-β) signaling pathways to alleviate oxidative stress-induced skin aging. Moreover, the results revealed that CF extract not only promoted collagen synthesis but also improved aging-induced collagen degradation. CF extract attenuated AGEs-induced ROS production and the upregulation of receptor for AGEs (RAGE). The overall results suggest that CF extract provides an effective anti-aging strategy by preventing skin damage from oxidative stress and collagen loss with potent antioxidant, anti-photoaging, and antiglycation activities.
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Affiliation(s)
- Jia-Ling Lyu
- Ph.D. Program for Biotechnology Industry, College of Life Sciences, China Medical University, Taichung 404, Taiwan; (J.-L.L.); (Y.-J.L.)
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung 404, Taiwan;
- Institute of New Drug Development, College of Medicine, China Medical University, Taichung 404, Taiwan
| | - Yi-Jung Liu
- Ph.D. Program for Biotechnology Industry, College of Life Sciences, China Medical University, Taichung 404, Taiwan; (J.-L.L.); (Y.-J.L.)
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung 404, Taiwan;
- Department of Biological Science and Technology, College of Life Sciences, China Medical University, Taichung 404, Taiwan
| | - Kuo-Ching Wen
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung 404, Taiwan;
| | - Chen-Yuan Chiu
- Center of Consultation, Center for Drug Evaluation, Taipei 115, Taiwan;
| | - Yung-Hsiang Lin
- Research and Design Center, TCI Co., Ltd., Taipei 114, Taiwan;
| | - Hsiu-Mei Chiang
- Ph.D. Program for Biotechnology Industry, College of Life Sciences, China Medical University, Taichung 404, Taiwan; (J.-L.L.); (Y.-J.L.)
- Department of Cosmeceutics, College of Pharmacy, China Medical University, Taichung 404, Taiwan;
- Correspondence: ; Tel.: +886-4-2205-3366-5302
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Matsumoto S, Ochi M, Akechi Y, Takei S, Senzaki K, Okada Y, Miura S, Ochi H, Igase M, Ohyagi Y. Dermal advanced glycation end-product accumulation is associated with sarcopenia-related measures in middle-aged and older men. Arch Gerontol Geriatr 2022; 101:104704. [DOI: 10.1016/j.archger.2022.104704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 03/24/2022] [Accepted: 04/12/2022] [Indexed: 11/02/2022]
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Biophysical changes in methylglyoxal modified fibrinogen and its role in the immunopathology of type 2 diabetes mellitus. Int J Biol Macromol 2022; 202:199-214. [PMID: 34999047 DOI: 10.1016/j.ijbiomac.2021.12.161] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/10/2021] [Accepted: 12/24/2021] [Indexed: 12/20/2022]
Abstract
Methylglyoxal (MG), a highly reactive dicarbonyl metabolite gets generated during glucose oxidation and lipid peroxidation, which contributes to glycation. In type 2 diabetes mellitus (T2DM), non-enzymatic glycosylation of proteins mediated by hyperglycemia results in the pathogenesis of diabetes-associated secondary complications via the generation of AGEs. Under in vitro conditions, MG altered the tertiary structure of fibrinogen. High-performance liquid chromatography (HPLC) and liquid chromatography mass spectroscopy (LCMS) studies confirmed the generation of N-(carboxymethyl) lysine, N-(carboxyethyl) lysine, hydroimidazolone, pentosidine and argpyrimidine in the modified protein. The altered fibrinogen structure upon glycation was further confirmed by confocal microscopy and nuclear magnetic resonance spectra (NMR). MG-Fib was found to be more immunogenic, as compared to its native analogue, in the immunological studies conducted on experimental rabbits. Our results reflect the presence of neo-antigenic determinants on modified fibrinogen. Competitive inhibition enzyme-linked immunosorbent assay suggested the presence of neo-epitopes with marked immunogenicity eliciting specific immune response. Binding studies on purified immunoglobulin G (IgG) confirmed the enhanced and specific immunogenicity of MG-Fib. Studies on interaction of MG-Fib with the circulating auto-antibodies from T2DM patients showed high affinity of serum antibodies toward MG-Fib. This study suggests a potent role of glycoxidatively modified fibrinogen in the generation of auto-immune response in T2DM patients.
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Revisiting Methodologies for In Vitro Preparations of Advanced Glycation End Products. Appl Biochem Biotechnol 2022; 194:2831-2855. [PMID: 35257316 DOI: 10.1007/s12010-022-03860-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 02/24/2022] [Indexed: 11/02/2022]
Abstract
Chronic elevation of sugar and oxidative stress generally results in development of advanced glycation end products (AGEs) in diabetic individuals. Accumulation of AGEs in an individual can give rise to the activation of several pathways that will ultimately lead to various complications. Such AGEs can also be prepared in an in vitro environment. For an in vitro preparation of advanced glycation end products (AGEs), proteins, lipids, or nucleic acids are generally required to be incubated with reducing sugars at a physiological temperature or higher depending upon the protocol optimized for its preparation. Certain other factors are also optimized and added to the buffer to hasten its preparation or alter the properties of prepared AGEs. Through this review, we intend to highlight the various studies related to the experimental procedures for the preparation of different types of AGEs. In addition, we present the comparative study of methodologies optimized for the preparation of AGEs.
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Poly-2-methyl-2-oxazoline–modified bioprosthetic heart valve leaflets have enhanced biocompatibility and resist structural degeneration. Proc Natl Acad Sci U S A 2022; 119:2120694119. [PMID: 35131859 PMCID: PMC8833185 DOI: 10.1073/pnas.2120694119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2022] [Indexed: 12/26/2022] Open
Abstract
Bioprosthetic heart valves (BHV) fabricated from glutaraldehyde-fixed heterograft tissue, such as bovine pericardium (BP), are widely used for treating heart valve disease, a group of disorders that affects millions. Structural valve degeneration (SVD) of BHV due to both calcification and the accumulation of advanced glycation end products (AGE) with associated serum proteins limits durability. We hypothesized that BP modified with poly-2-methyl-2-oxazoline (POZ) to inhibit protein entry would demonstrate reduced accumulation of AGE and serum proteins, mitigating SVD. In vitro studies of POZ-modified BP demonstrated reduced accumulation of serum albumin and AGE. BP-POZ in vitro maintained collagen microarchitecture per two-photon microscopy despite AGE incubation, and in cell culture studies was associated with no change in tumor necrosis factor-α after exposure to AGE and activated macrophages. Comparing POZ and polyethylene glycol (PEG)–modified BP in vitro, BP-POZ was minimally affected by oxidative conditions, whereas BP-PEG was susceptible to oxidative deterioration. In juvenile rat subdermal implants, BP-POZ demonstrated reduced AGE formation and serum albumin infiltration, while calcification was not inhibited. However, BP-POZ rat subdermal implants with ethanol pretreatment demonstrated inhibition of both AGE accumulation and calcification. Ex vivo laminar flow studies with human blood demonstrated BP-POZ enhanced thromboresistance with reduced white blood cell accumulation. We conclude that SVD associated with AGE and serum protein accumulation can be mitigated through POZ functionalization that both enhances biocompatibility and facilitates ethanol pretreatment inhibition of BP calcification.
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20
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Zhang Z, Li Z, Lin H. Reducing the Allergenicity of Shrimp Tropomyosin and Allergy Desensitization Based on Glycation Modification. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:14742-14750. [PMID: 34427086 DOI: 10.1021/acs.jafc.1c03953] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Shrimp is a major allergic food that could trigger severe food allergy, with the most significant and potent allergen of shrimp referred to as tropomyosin (TM). Glycation modification (Maillard reaction) could reportedly weaken the allergenicity of TM and generate hypoallergenic TM, while up to now, there is still a lack of investigations on the hypoallergenic glycated tropomyosin (GTM) as a candidate immunotherapy for desensitizing the shrimp TM-induced allergy. This study analyzed the effects of glycation modification on decreasing the allergenicity of TM and generated hypoallergenic GTM and how GTM absorbed to the Al(OH)3 function as a candidate immunotherapy for desensitizing allergy. As the results, in comparison to TM, the saccharides of smaller molecular sizes could lead to more advanced glycation end products in GTMs than saccharides of greater molecular sizes, and TM glycated by saccharides of different molecular sizes (glucose, maltose, maltotriose, maltopentaose, and maltoheptaose) exhibited lower allergenicity as a hypoallergen upon activating the allergic reactions of the mast cell and mouse model, while TM glycated by maltose had insignificant allergenicity changes upon activating the allergic reactions of the mast cell and mouse model. In addition, the hypoallergenic GTM + Al(OH)3 was efficient as a candidate immunotherapy; this work intended to offer preclinical data to promote GTM + Al(OH)3 as a candidate allergen-specific immunotherapy for desensitizing the allergy reactions for patients allergic to shrimp food.
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Affiliation(s)
- Ziye Zhang
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Zhenxing Li
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Hong Lin
- Laboratory of Food Safety, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
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Alkahtani S, Alarifi S, Alkahtane AA, Albasher G, AL-Zharani M, Alhoshani NM, AL-Johani NS, Aljarba NH, Saquib Hasnain M. Pyrroloquinoline quinone alleviates oxidative damage induced by high glucose in HepG2 cells. Saudi J Biol Sci 2021; 28:6127-6132. [PMID: 34759737 PMCID: PMC8568716 DOI: 10.1016/j.sjbs.2021.06.063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/15/2021] [Accepted: 06/21/2021] [Indexed: 12/12/2022] Open
Abstract
Hyperglycemia as a common metabolic disorder in diabetes led to oxidative stress, inflammation and other complications. Natural and manufactured antioxidants alleviates the side effects of diabetes. The purpose of current study is to investigate the effect of pyrroloquinoline quinine (PQQ) as an antioxidant on the content of glucose-induced oxidative stress generation in the cells of the human hepatocellular liver carcinoma (HepG2) by inhibiting advanced glycation end products (AGEs) formation. The HepG2 cells were exposed to high dose (50 mM) of glucose (HG) only and with PQQ (HG + PQQ). Treatment with high dose increased AGEs formation, expression of receptor for advanced glycation endproducts (RAGE), reactive oxygen species ROS production, and oxidative stress markers in treated HepG2 cells. Interestingly, PQQ significantly reduced AGEs formation and (RAGE) expression, ROS formation, and inflammation induced by glucose. In conclusion, PQQ has a potentiail role as an antioxidant to reduce the oxidative damage during hyperglycemia by AGEs inhibition.
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Affiliation(s)
- Saad Alkahtani
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Saud Alarifi
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdullah A. Alkahtane
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Gadah Albasher
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed AL-Zharani
- Department of Biology, College of Science, Imam Muhammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Norah M. Alhoshani
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Norah S. AL-Johani
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Nada H. Aljarba
- Department of Biology, College of Sciences, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Md Saquib Hasnain
- Department of Pharmacy, Palamau Institute of Pharmacy, Chianki, Daltonganj 822102, Jharkhand, India
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22
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Chen Y, Guo TL. Dietary advanced glycation end-products elicit toxicological effects by disrupting gut microbiome and immune homeostasis. J Immunotoxicol 2021; 18:93-104. [PMID: 34436982 PMCID: PMC9885815 DOI: 10.1080/1547691x.2021.1959677] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The aging immune system is characterized by a low-grade chronic systemic inflammatory state ("inflammaging") marked by elevated serum levels of inflammatory molecules such as interleukin (IL)-6 and C-reactive protein (CRP). These inflammatory markers were also reported to be strong predictors for the development/severity of Type 2 diabetes, obesity, and COVID-19. The levels of these markers have been positively associated with those of advanced glycation end-products (AGEs) generated via non-enzymatic glycation and oxidation of proteins and lipids during normal aging and metabolism. Based on the above observations, it is clinically important to elucidate how dietary AGEs modulate inflammation and might thus increase the risk for aging-exacerbated diseases. The present narrative review discusses the potential pro-inflammatory properties of dietary AGEs with a focus on the inflammatory mediators CRP, IL-6 and ferritin, and their relations to aging in general and Type 2 diabetes in particular. In addition, underlying mechanisms - including those related to gut microbiota and the receptors for AGEs, and the roles AGEs might play in affecting physiologies of the healthy elderly, obese individuals, and diabetics are discussed in regard to any greater susceptibility to COVID-19.
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Affiliation(s)
- Yingjia Chen
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Tai L. Guo
- Department of Biomedical Sciences, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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24
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Kumari N, Bandyopadhyay D, Kumar V, Venkatesh DB, Prasad S, Prakash S, Krishnaswamy PR, Balaram P, Bhat N. Glycation of albumin and its implication in Diabetes: A comprehensive analysis using mass spectrometry. Clin Chim Acta 2021; 520:108-117. [PMID: 34089724 DOI: 10.1016/j.cca.2021.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/09/2021] [Accepted: 06/01/2021] [Indexed: 11/18/2022]
Abstract
AIM To understand the mechanism of glycation of albumin and effects on cysteinylation and methionine oxidation. METHODS The in vitro glycation of HSA and BSA was studied with varying concentrations of glucose. Clinical blood samples of diabetic subjects with varying HbA1c values, were analyzed to assess in vivo glycation. All samples and their tryptic digests were analyzed using liquid chromatography/mass spectrometry. Glycation sites were mapped on to the three-dimensional structure of the HSA and BSA. RESULTS A total thirty-one sites for glycation and eight sites of Nε-carboxymethyl-lysine (CML) modification were identified on albumin. The site selectivity of glycation was correlated with the environment of the reactive residue in the three-dimensional structure. CONCLUSIONS The maximum percentage glycation under extreme conditions was in the range of ~55 to 88% in four weeks. Two major glycation sites K-233 and K-525 were identified, which together accounted for 40-50% of total glycation. A correlation was observed between glycation and oxidation of methionine residues in samples glycated in vitro. The role of spatially proximate residues in facilitating the glycation process is evident. The tri- and tetra-glycated isoforms of albumin can serve as biomarkers for the severe uncontrolled diabetic state.
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Affiliation(s)
- Namita Kumari
- Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India.
| | - Debarati Bandyopadhyay
- Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India; Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Vinay Kumar
- PathShodh Healthcare Pvt. Ltd, Bengaluru 560094, India
| | - D B Venkatesh
- Anand Diagnostic Laboratory, Bengaluru 560001, India
| | - Sujay Prasad
- Anand Diagnostic Laboratory, Bengaluru 560001, India
| | - Sunita Prakash
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru 560012, India
| | - P R Krishnaswamy
- Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India
| | - P Balaram
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru 560012, India; National Centre for Biological Sciences, Bengaluru 560065, India
| | - Navakanta Bhat
- Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India
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Zhang D, Zhu P, Han L, Chen X, Liu H, Sun B. Highland Barley and Its By-Products Enriched with Phenolic Compounds for Inhibition of Pyrraline Formation by Scavenging α-Dicarbonyl Compounds. Foods 2021; 10:1109. [PMID: 34067809 PMCID: PMC8156036 DOI: 10.3390/foods10051109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 12/02/2022] Open
Abstract
Pyrraline, a typical kind of advanced glycation end product, has been found to contribute to the development of pathologies associated with ageing and diabetes mellitus. In the study, phenolic compounds extracted from highland barley whole grain (HBWG) and vinasse (HBVN) were used to inhibit pyrraline formation in a simulated food. The optimal extraction condition for HBWG and HBVN was using 8 mL of 50% acetone solution at 50 °C for 60 min. The extraction and identification of phenolic compounds from HBWG and HBVN were performed by UPLC-PAD-MS/MS. The inhibitory effects of pyrraline in the simulated food were 52.03% and 49.22% by HBVN and HBWG, respectively. The diphenyl picrylhydrazyl radical- and ferric-reducing ability of plasma assays was used to evaluate the antioxidant activity of the extracts. The main inhibition pathways and molecular mechanism of phenolic compounds on pyrraline regulation were explored by scavenging α-dicarbonyl compounds. The study demonstrated that highland barley and its by-products can potentially be used as a functional food to regulate pyrraline formation during food processing.
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Affiliation(s)
| | | | | | | | - Huilin Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing 100048, China; (D.Z.); (P.Z.); (L.H.); (X.C.); (B.S.)
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Iacobini C, Vitale M, Pesce C, Pugliese G, Menini S. Diabetic Complications and Oxidative Stress: A 20-Year Voyage Back in Time and Back to the Future. Antioxidants (Basel) 2021; 10:antiox10050727. [PMID: 34063078 PMCID: PMC8147954 DOI: 10.3390/antiox10050727] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 04/30/2021] [Accepted: 05/03/2021] [Indexed: 02/07/2023] Open
Abstract
Twenty years have passed since Brownlee and colleagues proposed a single unifying mechanism for diabetic complications, introducing a turning point in this field of research. For the first time, reactive oxygen species (ROS) were identified as the causal link between hyperglycemia and four seemingly independent pathways that are involved in the pathogenesis of diabetes-associated vascular disease. Before and after this milestone in diabetes research, hundreds of articles describe a role for ROS, but the failure of clinical trials to demonstrate antioxidant benefits and some recent experimental studies showing that ROS are dispensable for the pathogenesis of diabetic complications call for time to reflect. This twenty-year journey focuses on the most relevant literature regarding the main sources of ROS generation in diabetes and their role in the pathogenesis of cell dysfunction and diabetic complications. To identify future research directions, this review discusses the evidence in favor and against oxidative stress as an initial event in the cellular biochemical abnormalities induced by hyperglycemia. It also explores possible alternative mechanisms, including carbonyl stress and the Warburg effect, linking glucose and lipid excess, mitochondrial dysfunction, and the activation of alternative pathways of glucose metabolism leading to vascular cell injury and inflammation.
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Affiliation(s)
- Carla Iacobini
- Department of Clinical and Molecular Medicine, “La Sapienza” University, 00189 Rome, Italy; (C.I.); (M.V.); (S.M.)
| | - Martina Vitale
- Department of Clinical and Molecular Medicine, “La Sapienza” University, 00189 Rome, Italy; (C.I.); (M.V.); (S.M.)
| | - Carlo Pesce
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetic and Maternal Infantile Sciences (DINOGMI), Department of Excellence of MIUR, University of Genoa Medical School, 16132 Genoa, Italy;
| | - Giuseppe Pugliese
- Department of Clinical and Molecular Medicine, “La Sapienza” University, 00189 Rome, Italy; (C.I.); (M.V.); (S.M.)
- Correspondence: ; Tel.: +39-063-377-5440
| | - Stefano Menini
- Department of Clinical and Molecular Medicine, “La Sapienza” University, 00189 Rome, Italy; (C.I.); (M.V.); (S.M.)
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Alsamad F, Brunel B, Vuiblet V, Gillery P, Jaisson S, Piot O. In depth investigation of collagen non-enzymatic glycation by Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 251:119382. [PMID: 33461140 DOI: 10.1016/j.saa.2020.119382] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Non-enzymatic glycation is a post-translational modification of long-lived matrix proteins such as type I collagen. It occurs during aging and leads to the formation of advanced glycation end-products (AGEs). AGE accumulation is associated with severe complications in chronic and age-related diseases. The assessment of modifications induced by this (patho)physiological process represents an interest in biology and medicine for a better patient care. The objective of our work was to position the interest of Raman spectroscopy in the quantification of collagen glycation. Two types of in vitro glycation were used by incubating collagen samples, at different durations, with ribose or glyoxylic acid; these reducing agents acting on the chemical specificity of the glycation reaction. Glycation efficiency was evaluated by the liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) quantification of carboxymethyllysine (CML) and pentosidine, which are among the most studied AGEs. Raman data were processed by PCA coupled to validity indices and Lasso regression as multivariate analysis tools. Regression models were constructed by considering the LC-MS/MS results as reference values. A marked variability was observed within the Raman datasets making difficult the identification of spectral differences between control and ribose-treated collagen samples. By taking advantage of the chemical specificity of the glyoxylic acid treatment leading to CML formation, on one hand, and the feature selection included in the Lasso algorithm, on the other hand, Raman markers associated with glycation were identified. The assigned vibrations corresponded to modifications of side chains of collagen. In addition, a threshold of CML concentration was determined as quantitative indicator of the applicability of Raman spectroscopy for potential patient follow-up purposes. Although lacking in sensitivity to directly detect AGEs in collagen, Raman spectroscopy allows to highlight the molecular modifications of collagen induced by glycation.
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Affiliation(s)
- Fatima Alsamad
- University of Reims Champagne-Ardenne, BioSpecT, EA n°7506, Faculty of Pharmacy, SFR Santé, Reims, France.
| | - Benjamin Brunel
- University of Reims Champagne-Ardenne, BioSpecT, EA n°7506, Faculty of Pharmacy, SFR Santé, Reims, France.
| | - Vincent Vuiblet
- University of Reims Champagne-Ardenne, BioSpecT, EA n°7506, Faculty of Pharmacy, SFR Santé, Reims, France.
| | - Philippe Gillery
- University of Reims Champagne-Ardenne, MEDyC Unit CNRS UMR n°7369, Faculty of Medicine, SFR Santé, Reims, France; University Hospital of Reims, Biochemistry Department, Reims, France.
| | - Stephane Jaisson
- University of Reims Champagne-Ardenne, MEDyC Unit CNRS UMR n°7369, Faculty of Medicine, SFR Santé, Reims, France; University Hospital of Reims, Biochemistry Department, Reims, France.
| | - Olivier Piot
- University of Reims Champagne-Ardenne, BioSpecT, EA n°7506, Faculty of Pharmacy, SFR Santé, Reims, France; University of Reims Champagne-Ardenne, PICT (Cellular and Tissular Imaging Platform), Reims, France.
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Korwar AM, Zhang Q. Comprehensive Quantification of Carboxymethyllysine-Modified Peptides in Human Plasma. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:744-752. [PMID: 33512994 PMCID: PMC8075102 DOI: 10.1021/jasms.0c00443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A prolonged hyperglycemic condition in diabetes mellitus results in glycation of plasma proteins. N(ε)-Carboxymethyllysine (CML) is a well-known protein advanced glycation end product, and one of its mechanisms of formation is through further oxidation of Amadori compound modified lysine (AML). Unlike enrichment of AML peptides using boronate affinity, biochemical enrichment methods are scarce for comprehensive profiling of CML-modified peptides. To address this problem, we used AML peptide sequence and site of modification as template library to identify and quantify CML peptides. In this study, a parallel reaction monitoring workflow was developed to comprehensively quantify CML modified peptides in Type 1 diabetic subjects' plasma with good and poor glycemic control (n = 20 each). A total of 58 CML modified peptides were quantified, which represented 57 CML modification sites in 19 different proteins. Out of the 58 peptides, five were significantly higher in poor glycemic control samples with the area under the receiver operating characteristic curve ≥0.83. These peptides could serve as promising indicators of glycemic control in Type 1 diabetes management.
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Affiliation(s)
- Arvind M. Korwar
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, NC 28081, USA
| | - Qibin Zhang
- Center for Translational Biomedical Research, University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, NC 28081, USA
- Department of Chemistry & Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27412, USA
- Corresponding author: Dr. Qibin Zhang, UNCG Center for Translational Biomedical Research, 600 Laureate Way, Kannapolis, NC 28081,
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29
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Ramya R, Coral K, Bharathidevi SR. RAGE silencing deters CML-AGE induced inflammation and TLR4 expression in endothelial cells. Exp Eye Res 2021; 206:108519. [PMID: 33639133 DOI: 10.1016/j.exer.2021.108519] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/02/2021] [Accepted: 02/15/2021] [Indexed: 12/26/2022]
Abstract
The Nε-(carboxymethyl)lysine (CML), the predominant advanced glycation end products (AGEs) in diabetes and its RAGE induced cytokine release has been well explored. But the CML mediated multiple AGEs receptor expression is still not understood and the role played by RAGE silencing in modulating CML generated pro-inflammatory cytokines in micro and macrovascular endothelial cells is yet to be studied. HUVEC and HREC cells were exposed with CML for 24 h. RAGE, AGER1, AGER2, Gal-3, TLR4, TLR2, CD36, FEEL-1, FEEL-2, and chemokine HMGB1 were quantified by either qPCR/western blotting. The receptor's expression was also determined in control vs diabetic retina. Expression of pro-inflammatory genes, ROS, and mitochondrial membrane potential change were assessed using ELISA, DCFDA, and JC-1 method respectively. RAGE expression was silenced either by Si-RAGE or neutralising antibody with anti-RAGE and expression of other AGE receptors, adaptors, and signalling pathway were studied compared with Si-Control. CML activated RAGE, TLR4, HMGB1(p < 0.001) and Gal-3 (p < 0.05) expression in both micro and macro vascular cells. Cadaveric diabetic retinal tissues also showed increased expression of RAGE, TLR4 and HMGB1 (p < 0.05). RAGE silencing significantly reduced TLR4, HMGB1 (p < 0.05) expression and inhibited the phosphorylation of NFκB and ERK1/2 in both these cells. The TLR4 adaptors MyD88 and TIRAP (p < 0.05) showed down regulation on RAGE silencing. This study shows CML induces AGE receptors expression as observed in diabetic retina and RAGE silencing down regulated TLR4 signalling and cytokine release by partly modulating TLR4 adaptors which needs further validation. From this study we speculate targeting the TLR4 adaptors like MyD88 and TIRAP can be a potential therapeutic target for reducing diabetic induced vascular complications.
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Affiliation(s)
- Ravi Ramya
- R.S. Mehta Jain Department of Biochemistry and Cell Biology, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai, 600006, India; School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Karunakaran Coral
- R.S. Mehta Jain Department of Biochemistry and Cell Biology, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai, 600006, India
| | - Subramaniam Rajesh Bharathidevi
- R.S. Mehta Jain Department of Biochemistry and Cell Biology, KBIRVO, Vision Research Foundation, Sankara Nethralaya, Chennai, 600006, India.
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30
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Restivo I, Attanzio A, Tesoriere L, Allegra M. Suicidal Erythrocyte Death in Metabolic Syndrome. Antioxidants (Basel) 2021; 10:antiox10020154. [PMID: 33494379 PMCID: PMC7911029 DOI: 10.3390/antiox10020154] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 02/07/2023] Open
Abstract
Eryptosis is a coordinated, programmed cell death culminating with the disposal of cells without disruption of the cell membrane and the release of endocellular oxidative and pro-inflammatory milieu. While providing a convenient form of death for erythrocytes, dysregulated eryptosis may result in a series of detrimental and harmful pathological consequences highly related to the endothelial dysfunction (ED). Metabolic syndrome (MetS) is described as a cluster of cardiometabolic factors (hyperglycemia, dyslipidemia, hypertension and obesity) that increases the risk of cardiovascular complications such as those related to diabetes and atherosclerosis. In the light of the crucial role exerted by the eryptotic process in the ED, the focus of the present review is to report and discuss the involvement of eryptosis within MetS, where vascular complications are utterly relevant. Current knowledge on the mechanisms leading to eryptosis in MetS-related conditions (hyperglycemia, dyslipidemia, hypertension and obesity) will be analyzed. Moreover, clinical evidence supporting or proposing a role for eryptosis in the ED, associated to MetS cardiovascular complications, will be discussed.
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Affiliation(s)
| | | | - Luisa Tesoriere
- Correspondence: (L.T.); (M.A.); Tel.: +39-091-238-96803 (L.T. & M.A.)
| | - Mario Allegra
- Correspondence: (L.T.); (M.A.); Tel.: +39-091-238-96803 (L.T. & M.A.)
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31
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Diabetes and Pancreatic Cancer-A Dangerous Liaison Relying on Carbonyl Stress. Cancers (Basel) 2021; 13:cancers13020313. [PMID: 33467038 PMCID: PMC7830544 DOI: 10.3390/cancers13020313] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/09/2021] [Accepted: 01/14/2021] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Diabetic people have an increased risk of developing several types of cancers, particularly pancreatic cancer. The higher availability of glucose and/or lipids that characterizes diabetes and obesity is responsible for the increased production of highly reactive carbonyl compounds, a condition referred to as “carbonyl stress”. Also known as glycotoxins and lipotoxins, these compounds react quickly and damage various molecules in cells forming final products termed AGEs (advanced glycation end-products). AGEs were shown to markedly accelerate tumor development in an experimental model of pancreatic cancer and AGE inhibition prevented the tumor-promoting effect of diabetes. In humans, carbonyl stress has been associated with the risk of pancreatic cancer and recognized as a possible contributor to other cancers, including breast and colorectal cancer. These findings suggest that carbonyl stress is involved in cancer development and growth and may be the mechanistic link between diabetes and pancreatic cancer, thus representing a potential drug target. Abstract Both type 2 (T2DM) and type 1 (T1DM) diabetes mellitus confer an increased risk of pancreatic cancer in humans. The magnitude and temporal trajectory of the risk conferred by the two forms of diabetes are similar, suggesting a common mechanism. Carbonyl stress is a hallmark of hyperglycemia and dyslipidemia, which accompanies T2DM, prediabetes, and obesity. Accumulating evidence demonstrates that diabetes promotes pancreatic ductal adenocarcinoma (PDAC) in experimental models of T2DM, a finding recently confirmed in a T1DM model. The carbonyl stress markers advanced glycation end-products (AGEs), the levels of which are increased in diabetes, were shown to markedly accelerate tumor development in a mouse model of Kras-driven PDAC. Consistently, inhibition of AGE formation by trapping their carbonyl precursors (i.e., reactive carbonyl species, RCS) prevented the PDAC-promoting effect of diabetes. Considering the growing attention on carbonyl stress in the onset and progression of several cancers, including breast, lung and colorectal cancer, this review discusses the mechanisms by which glucose and lipid imbalances induce a status of carbonyl stress, the oncogenic pathways activated by AGEs and their precursors RCS, and the potential use of carbonyl-scavenging agents and AGE inhibitors in PDAC prevention and treatment, particularly in high-risk diabetic individuals.
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32
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Khajuria DK, Soliman M, Elfar JC, Lewis GS, Abraham T, Kamal F, Elbarbary RA. Aberrant structure of fibrillar collagen and elevated levels of advanced glycation end products typify delayed fracture healing in the diet-induced obesity mouse model. Bone 2020; 137:115436. [PMID: 32439570 PMCID: PMC7938873 DOI: 10.1016/j.bone.2020.115436] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/17/2020] [Accepted: 05/14/2020] [Indexed: 12/16/2022]
Abstract
Impaired fracture healing in patients with obesity-associated type 2 diabetes (T2D) is a significant unmet clinical problem that affects millions of people worldwide. However, the underlying causes are poorly understood. Additionally, limited clinical information is available on how pre-diabetic hyperglycemia in obese individuals impacts bone healing. Here, we use the diet-induced obesity (DIO) mouse (C57BL/6J) model to study the impact of obesity-associated pre-diabetic hyperglycemia on bone healing and fibrillar collagen organization as healing proceeds from one phase to another. We show that DIO mice exhibit defective healing characterized by reduced bone mineral density, bone volume, and bone volume density. Differences in the healing pattern between lean and DIO mice occur early in the healing process as evidenced by faster resorption of the fibrocartilaginous callus in DIO mice. However, the major differences between lean and DIO mice occur during the later phases of endochondral ossification and bone remodeling. Comprehensive analyses of fibrillar collagen microstructure and expression pattern during these phases, using a set of complementary techniques that include histomorphometry, immunofluorescence staining, and second harmonic generation microscopy, demonstrate significant defects in DIO mice. Defects include strikingly sparse and disorganized collagen fibers, as well as pathological accumulation of unfolded collagen triple helices. We also demonstrate that DIO-associated changes in fibrillar collagen structure are attributable, at least in part, to the accumulation of advanced glycation end products, which increase the collagen-fiber crosslink density. These major changes impair fibrillar collagens functions, culminating in defective callus mineralization, remodeling, and strength. Our data extend the understanding of mechanisms by which obesity and its associated hyperglycemia impair fracture healing and underline defective fibrillar collagen microstructure as a novel and important contributor.
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Affiliation(s)
- Deepak Kumar Khajuria
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for Orthopaedic Research and Translational Science (CORTS), The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Marwa Soliman
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for Orthopaedic Research and Translational Science (CORTS), The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - John C Elfar
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for Orthopaedic Research and Translational Science (CORTS), The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Gregory S Lewis
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for Orthopaedic Research and Translational Science (CORTS), The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Thomas Abraham
- Microscopy Imaging Facility, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Department of Neural and Behavioural Sciences, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Fadia Kamal
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for Orthopaedic Research and Translational Science (CORTS), The Pennsylvania State University College of Medicine, Hershey, PA, USA; Department of Pharmacology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Reyad A Elbarbary
- Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for Orthopaedic Research and Translational Science (CORTS), The Pennsylvania State University College of Medicine, Hershey, PA, USA; Department of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA, USA; Center for RNA Molecular Biology, Pennsylvania State University, University Park, PA, USA.
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Menini S, Iacobini C, Fantauzzi CB, Pugliese G. L-carnosine and its Derivatives as New Therapeutic Agents for the Prevention and Treatment of Vascular Complications of Diabetes. Curr Med Chem 2020; 27:1744-1763. [PMID: 31296153 DOI: 10.2174/0929867326666190711102718] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/20/2019] [Accepted: 04/25/2019] [Indexed: 02/01/2023]
Abstract
Vascular complications are among the most serious manifestations of diabetes. Atherosclerosis is the main cause of reduced life quality and expectancy in diabetics, whereas diabetic nephropathy and retinopathy are the most common causes of end-stage renal disease and blindness. An effective therapeutic approach to prevent vascular complications should counteract the mechanisms of injury. Among them, the toxic effects of Advanced Glycation (AGEs) and Lipoxidation (ALEs) end-products are well-recognized contributors to these sequelae. L-carnosine (β-alanyl-Lhistidine) acts as a quencher of the AGE/ALE precursors Reactive Carbonyl Species (RCS), which are highly reactive aldehydes derived from oxidative and non-oxidative modifications of sugars and lipids. Consistently, L-carnosine was found to be effective in several disease models in which glyco/lipoxidation plays a central pathogenic role. Unfortunately, in humans, L-carnosine is rapidly inactivated by serum carnosinase. Therefore, the search for carnosinase-resistant derivatives of Lcarnosine represents a suitable strategy against carbonyl stress-dependent disorders, particularly diabetic vascular complications. In this review, we present and discuss available data on the efficacy of L-carnosine and its derivatives in preventing vascular complications in rodent models of diabetes and metabolic syndrome. We also discuss genetic findings providing evidence for the involvement of the carnosinase/L-carnosine system in the risk of developing diabetic nephropathy and for preferring the use of carnosinase-resistant compounds in human disease. The availability of therapeutic strategies capable to prevent both long-term glucose toxicity, resulting from insufficient glucoselowering therapy, and lipotoxicity may help reduce the clinical and economic burden of vascular complications of diabetes and related metabolic disorders.
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Affiliation(s)
- Stefano Menini
- Department of Clinical and Molecular Medicine, "La Sapienza" University, Rome, Italy
| | - Carla Iacobini
- Department of Clinical and Molecular Medicine, "La Sapienza" University, Rome, Italy
| | | | - Giuseppe Pugliese
- Department of Clinical and Molecular Medicine, "La Sapienza" University, Rome, Italy
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Feskens E, Brennan L, Dussort P, Flourakis M, Lindner LME, Mela D, Rabbani N, Rathmann W, Respondek F, Stehouwer C, Theis S, Thornalley P, Vinoy S. Potential Markers of Dietary Glycemic Exposures for Sustained Dietary Interventions in Populations without Diabetes. Adv Nutr 2020; 11:1221-1236. [PMID: 32449931 PMCID: PMC7490172 DOI: 10.1093/advances/nmaa058] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/23/2020] [Accepted: 04/28/2020] [Indexed: 12/15/2022] Open
Abstract
There is considerable interest in dietary and other approaches to maintaining blood glucose concentrations within the normal range and minimizing exposure to postprandial hyperglycemic excursions. The accepted marker to evaluate the sustained maintenance of normal blood glucose concentrations is glycated hemoglobin A1c (HbA1c). However, although this is used in clinical practice to monitor glycemic control in patients with diabetes, it has a number of drawbacks as a marker of efficacy of dietary interventions that might beneficially affect glycemic control in people without diabetes. Other markers that reflect shorter-term glycemic exposures have been studied and proposed, but consensus on the use and relevance of these markers is lacking. We have carried out a systematic search for studies that have tested the responsiveness of 6 possible alternatives to HbA1c as markers of sustained variation in glycemic exposures and thus their potential applicability for use in dietary intervention trials in subjects without diabetes: 1,5-anhydroglucitol (1,5-AG), dicarbonyl stress, fructosamine, glycated albumin (GA), advanced glycated end products (AGEs), and metabolomic profiles. The results suggest that GA may be the most promising for this purpose, but values may be confounded by effects of fat mass. 1,5-AG and fructosamine are probably not sensitive enough to the range of variation in glycemic exposures observed in healthy individuals. Use of measures based on dicarbonyls, AGEs, or metabolomic profiles would require further research into possible specific molecular species of interest. At present, none of the markers considered here is sufficiently validated and sensitive for routine use in substantiating the effects of sustained variation in dietary glycemic exposures in people without diabetes.
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Affiliation(s)
- Edith Feskens
- Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, The Netherlands
| | - Lorraine Brennan
- Institute of Food and Health, School of Agriculture and Food Science, University College Dublin, Dublin, Republic of Ireland
| | - Pierre Dussort
- International Life Sciences Institute-ILSI Europe a.i.s.b.l., Brussels, Belgium
| | - Matthieu Flourakis
- International Life Sciences Institute-ILSI Europe a.i.s.b.l., Brussels, Belgium,Address correspondence to MF (e-mail: )
| | - Lena M E Lindner
- Institute for Biometrics and Epidemiology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research , Munich, Germany
| | | | - Naila Rabbani
- Department of Basic Medical Sciences, College of Medicine, Qatar University Health, Qatar University, Doha, Qatar,Clinical Sciences Research Laboratories, University of Warwick, Coventry, United Kingdom
| | - Wolfgang Rathmann
- Institute for Biometrics and Epidemiology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research , Munich, Germany
| | | | - Coen Stehouwer
- Department of Internal Medicine, Maastricht University Medical Center, Maastricht, The Netherlands,School for Cardiovascular Diseases (CARIM), Maastricht University Medical Center, Maastricht, The Netherlands
| | | | - Paul Thornalley
- Clinical Sciences Research Laboratories, University of Warwick, Coventry, United Kingdom,Diabetes Research Center, Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Sophie Vinoy
- Nutrition Department, Mondelez Int R&D, Saclay, France
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35
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Eckhardt BA, Rowsey JL, Thicke BS, Fraser DG, O’Grady KL, Bondar OP, Hines JM, Singh RJ, Thoreson AR, Rakshit K, Lagnado AB, Passos JF, Vella A, Matveyenko AV, Khosla S, Monroe DG, Farr JN. Accelerated osteocyte senescence and skeletal fragility in mice with type 2 diabetes. JCI Insight 2020; 5:135236. [PMID: 32267250 PMCID: PMC7253018 DOI: 10.1172/jci.insight.135236] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 03/26/2020] [Indexed: 12/16/2022] Open
Abstract
The worldwide prevalence of type 2 diabetes (T2D) is increasing. Despite normal to higher bone density, patients with T2D paradoxically have elevated fracture risk resulting, in part, from poor bone quality. Advanced glycation endproducts (AGEs) and inflammation as a consequence of enhanced receptor for AGE (RAGE) signaling are hypothesized culprits, although the exact mechanisms underlying skeletal dysfunction in T2D are unclear. Lack of inducible models that permit environmental (in obesity) and temporal (after skeletal maturity) control of T2D onset has hampered progress. Here, we show in C57BL/6 mice that a onetime pharmacological intervention (streptozotocin, STZ) initiated in adulthood combined with high-fat diet-induced (HFD-induced) obesity caused hallmark features of human adult-onset T2D, including prolonged hyperglycemia, insulin resistance, and pancreatic β cell dysfunction, but not complete destruction. In addition, HFD/STZ (i.e., T2D) resulted in several changes in bone quality that closely mirror those observed in humans, including compromised bone microarchitecture, reduced biomechanical strength, impaired bone material properties, altered bone turnover, and elevated levels of the AGE CML in bone and blood. Furthermore, T2D led to the premature accumulation of senescent osteocytes with a unique proinflammatory signature. These findings highlight the RAGE pathway and senescent cells as potential targets to treat diabetic skeletal fragility.
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Affiliation(s)
| | | | | | - Daniel G. Fraser
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | | | | | | | | | - Andrew R. Thoreson
- Materials and Structural Testing Core
- Department of Physical Medicine and Rehabilitation, and
| | - Kuntol Rakshit
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Anthony B. Lagnado
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - João F. Passos
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Aleksey V. Matveyenko
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Sundeep Khosla
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | - David G. Monroe
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
| | - Joshua N. Farr
- Division of Endocrinology
- Robert and Arlene Kogod Center on Aging
- Division of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota, USA
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Park MS, Kim JK, Holmes C, Weiss AMF. Effects of Bicarbonate/Lactate Solution on Peritoneal Advanced Glycosylation End-Product Accumulation. Perit Dial Int 2020. [DOI: 10.1177/089686080002005s07] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Advanced glycosylation end-products (AGEs) are associated with diabetic complications and peritoneal damage after long-term peritoneal dialysis (PD) with high glucose dialysis solutions. Glucose degradation products (GDPs) derived during heat sterilization of high glucose dialysis solutions are thought to accelerate AGE formation. A new technique of separating glucose from electrolytes has yielded markedly lower GDP levels and permitted the use of dialysis solutions containing the physiologic buffer bicarbonate. Formation of AGEs in vitro with this new solution is significantly lower compared with formation of AGEs with conventional solutions.The purpose of the present study was to investigate the effect of long-term intraperitoneal use of new, neutral dialysis solution (B/L) containing bicarbonate (25 mmol/L) and lactate (15 mmol/L) on peritoneal AGE accumulation and permeability. Normal male Sprague–Dawley rats were used. Twice daily for 12 weeks, 30 mL of new solution (B/L) or conventional solution [Lac (lactate 40 mmol/L)] was injected into the peritoneal cavity of the test rats. As a control, rats that were not injected were kept for 12 weeks in the same manner as the test rats. After 12 weeks, a 2-hour peritoneal equilibration test (PET) was performed in the test rats. After the PET, the parietal peritoneum and liver were obtained for evaluation of peritoneal morphology and for immunohistochemistry for AGE. Intensity of AGE staining was semi-quantitatively graded from 0 to 3. The omentum was also obtained and immediately frozen for analysis of pentosidine content by high-performance liquid chromatography. Compared with findings in the control group, hematoxylin and eosin staining of the parietal peritoneum and liver samples revealed partial denudation of mesothelial cells in the Lac group; denudation was not remarkable in the B/L group. The B/L solution showed significantly less AGE staining in the peritoneal cavity compared to conventional solution. However, B/L solution failed to lower pentosidine levels. Intraperitoneal volume and the ratio of dialysate glucose at 2 hours to dialysate glucose at instillation (D2/D0glucose) were significantly lower and the ratio of dialysate urea to plasma urea at 2 hours (D2/P2urea) was significantly higher in the Lac and B/L groups than in the control group. Intra-peritoneal volume was significantly higher in the B/L group than in the Lac group; D2/D0glucose and D2/P2urea did not differ between the two groups.In conclusion, peritoneal ultrafiltration decreased after long-term PD. The B/L solution showed a small but statistically significant protective effect against decreasing ultrafiltration as compared with Lac solution. The B/L solution attenuated peritoneal AGE accumulation compared with conventional solution, but did not affect peritoneal pentosidine levels. These findings indicate that biochemical kinetics of various AGE peptides are not unique, but multivalent.
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Affiliation(s)
| | | | - Cliff Holmes
- Baxter Healthcare Corporation, Renal Division, McGaw Park, Illinois, U.S.A
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Nakayama M, Izumi G, Nemoto Y, Shibata K, Hasegawa T, Numata M, Wang K, Kawaguchi Y, Hosoya T. Suppression of Nε-(Carboxymethyl)Lysine Generation by the Antioxidant N-Acetylcysteine. Perit Dial Int 2020. [DOI: 10.1177/089686089901900305] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
ObjectiveAccumulated evidence suggests that Nε-(carboxymethyl)lysine (CML), which is a dominant antigen of advanced glycation end-products (AGEs), is generated in the peritoneal cavity of patients undergoing continuous ambulatory peritoneal dialysis (CAPD), and that this process may be involved in the pathophysiology of the peritoneal injury found with CAPD treatment. Since CML is a sequential product of glycation and oxidation processes, CML generation could be suppressed by antioxidants. The aim of this in vitro study was to clarify the effect of N-acetylcysteine (NAC), an antioxidant, on CML generation from proteins under high glucose settings mimicking peritoneal dialysis solutions.DesignTest proteins (bovine serum albumin/type I collagen) were incubated continuously for 16 weeks in glucose solutions (200 mmol/L) with or without NAC (2 mmol/L), and the generation time courses (8 and 16 weeks) of CML and furosine (the biomarker of the glycation products of the early Maillard reaction) were determined.ResultsIn both proteins, furosine and CML were progressively generated in accordance with the duration of the incubation period. No apparent differences were found between solutions with and without NAC in furosine levels at the 8th and 16th weeks. However, the generation of CML was lower in the solution with NAC throughout the test periods.ConclusionThe results showed that NAC could suppress the generation of CML. This indicates the therapeutic potential of antioxidants for the glycoxidative stress-related peritoneal injury occurring during CAPD.
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Affiliation(s)
| | - Giichi Izumi
- Tokyo Jikei University School of Medicine, Internal Medicine II Product Developing Center, Baxter Ltd., Tokyo, Japan
| | - Yasushi Nemoto
- Tokyo Jikei University School of Medicine, Internal Medicine II Product Developing Center, Baxter Ltd., Tokyo, Japan
| | - Koji Shibata
- Tokyo Jikei University School of Medicine, Internal Medicine II Product Developing Center, Baxter Ltd., Tokyo, Japan
| | | | | | - Kengmin Wang
- Tokyo Jikei University School of Medicine, Internal Medicine II Product Developing Center, Baxter Ltd., Tokyo, Japan
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Augustine J, Troendle EP, Barabas P, McAleese CA, Friedel T, Stitt AW, Curtis TM. The Role of Lipoxidation in the Pathogenesis of Diabetic Retinopathy. Front Endocrinol (Lausanne) 2020; 11:621938. [PMID: 33679605 PMCID: PMC7935543 DOI: 10.3389/fendo.2020.621938] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022] Open
Abstract
Lipids can undergo modification as a result of interaction with reactive oxygen species (ROS). For example, lipid peroxidation results in the production of a wide variety of highly reactive aldehyde species which can drive a range of disease-relevant responses in cells and tissues. Such lipid aldehydes react with nucleophilic groups on macromolecules including phospholipids, nucleic acids, and proteins which, in turn, leads to the formation of reversible or irreversible adducts known as advanced lipoxidation end products (ALEs). In the setting of diabetes, lipid peroxidation and ALE formation has been implicated in the pathogenesis of macro- and microvascular complications. As the most common diabetic complication, retinopathy is one of the leading causes of vision loss and blindness worldwide. Herein, we discuss diabetic retinopathy (DR) as a disease entity and review the current knowledge and experimental data supporting a role for lipid peroxidation and ALE formation in the onset and development of this condition. Potential therapeutic approaches to prevent lipid peroxidation and lipoxidation reactions in the diabetic retina are also considered, including the use of antioxidants, lipid aldehyde scavenging agents and pharmacological and gene therapy approaches for boosting endogenous aldehyde detoxification systems. It is concluded that further research in this area could lead to new strategies to halt the progression of DR before irreversible retinal damage and sight-threatening complications occur.
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Affiliation(s)
- Josy Augustine
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen’s University of Belfast, Belfast, United Kingdom
| | - Evan P. Troendle
- Department of Chemistry, King’s College London, London, United Kingdom
| | - Peter Barabas
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen’s University of Belfast, Belfast, United Kingdom
| | - Corey A. McAleese
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen’s University of Belfast, Belfast, United Kingdom
| | - Thomas Friedel
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen’s University of Belfast, Belfast, United Kingdom
| | - Alan W. Stitt
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen’s University of Belfast, Belfast, United Kingdom
| | - Tim M. Curtis
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Science, Queen’s University of Belfast, Belfast, United Kingdom
- *Correspondence: Tim M. Curtis,
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Ruiz HH, Ramasamy R, Schmidt AM. Advanced Glycation End Products: Building on the Concept of the "Common Soil" in Metabolic Disease. Endocrinology 2020; 161:bqz006. [PMID: 31638645 PMCID: PMC7188081 DOI: 10.1210/endocr/bqz006] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Revised: 10/01/2019] [Accepted: 08/16/2019] [Indexed: 12/11/2022]
Abstract
The role of advanced glycation end products (AGEs) in promoting and/or exacerbating metabolic dysregulation is being increasingly recognized. AGEs are formed when reducing sugars nonenzymatically bind to proteins or lipids, a process that is enhanced by hyperglycemic and hyperlipidemic environments characteristic of numerous metabolic disorders including obesity, diabetes, and its complications. In this mini-review, we put forth the notion that AGEs span the spectrum from cause to consequence of insulin resistance and diabetes, and represent a "common soil" underlying the pathophysiology of these metabolic disorders. Collectively, the surveyed literature suggests that AGEs, both those that form endogenously as well as exogenous AGEs derived from environmental factors such as pollution, smoking, and "Western"-style diets, contribute to the pathogenesis of obesity and diabetes. Specifically, AGE accumulation in key metabolically relevant organs induces insulin resistance, inflammation, and oxidative stress, which in turn provide substrates for excess AGE formation, thus creating a feed-forward-fueled pathological loop mediating metabolic dysfunction.
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Affiliation(s)
- Henry H Ruiz
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Ravichandran Ramasamy
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, NYU School of Medicine, New York, NY, USA
| | - Ann Marie Schmidt
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, NYU School of Medicine, New York, NY, USA
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Zhang Z, Li XM, Xiao H, Nowak-Wegrzyn A, Zhou P. Insight into the allergenicity of shrimp tropomyosin glycated by functional oligosaccharides containing advanced glycation end products. Food Chem 2020; 302:125348. [DOI: 10.1016/j.foodchem.2019.125348] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/06/2019] [Accepted: 08/08/2019] [Indexed: 02/04/2023]
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Jha P, Kumari S, Jobby R, Desai N, Ali A. Dietary Phytonutrients in the Prevention of Diabetes-related Complications. Curr Diabetes Rev 2020; 16:657-673. [PMID: 31490762 DOI: 10.2174/1573399815666190906151319] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/11/2019] [Accepted: 08/26/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND The increasing prevalence of reported cases of diabetes has evidently become a major global public health concern. Although diabetes management is possible by the administration of synthetic anti-diabetic agents, there are profound side-effects associated with their long-term usage. Hence there is a demand for safer alternatives which could be possibly formulated using specific yet common phytonutrients. OBJECTIVES The main objective of this review is to describe the cellular mechanisms of phytonutrients as an alternative to commercially available synthetic anti-diabetic agents in the management of diabetes and related complications. Furthermore, the clinical evidence that supports this view is also highlighted. METHODOLOGY An in-depth review of published literature was carried out to identify the most promising phytonutrients in the management of diabetes and related complications. RESULTS A number of phytonutrients are reported to be potential anti-diabetic agents. Few examples include biguanides, resveratrol, lycopene, thymoquinone and quercetin. However, suitable formulations using these phytonutrients and their clinical trials are still underway. Most of the reported findings focus on one aspect of several biochemical processes e.g. enhancement of glucose utilization, antioxidation, induction of insulin production, antiglycation, etc. An in-depth study of phytonutrients with respect to functional, immunological as well as biochemical factors suggesting their efficacy, as well as safety in the management of diabetes, is rarely reported. CONCLUSION Our study thus highlights the abundance of clinical evidence of the efficiency of phytonutrients, and at the same time, the scarcity of clinically approved and marketed phytonutrients, as drugs, for the management of diabetes and related complications.
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Affiliation(s)
- Pamela Jha
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Sonit Kumari
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Renitta Jobby
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Nitin Desai
- Amity School of Biotechnology, Amity University Mumbai, Pune Expressway, Bhatan Post, Somathne, Panvel, Mumbai, Maharashtra, India
| | - Ahmad Ali
- Department of Life Sciences, University of Mumbai, Vidyanagari, Santacruz (East), Mumbai, Maharashtra, India
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Kinoshita S, Sugawa H, Nanri T, Ohno RI, Shirakawa JI, Sato H, Katsuta N, Sakake S, Nagai R. Trapa bispinosa Roxb. and lutein ameliorate cataract in type 1 diabetic rats. J Clin Biochem Nutr 2019; 66:8-14. [PMID: 32001951 PMCID: PMC6983432 DOI: 10.3164/jcbn.19-34] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 08/15/2019] [Indexed: 01/28/2023] Open
Abstract
Trapa bispinosa Roxb. is an annual aquatic grass of the citrus family. Although its hot water extract displays antioxidative activity in vitro, little is known about its biological effectiveness. In the present study, we evaluated the extract’s inhibitory effect on diabetic cataractogenesis and formation of advanced glycation end-product. Lutein, which is beneficial for eye diseases, was administered concurrently. For short-term administration, Trapa bispinosa Roxb. hot water extract and/or lutein were administered to type 1 diabetic rats. Nɛ-(carboxymethyl)lysine and Nɛ-(carboxyethyl)lysine were quantified in serum using mass spectrometry. The long-term administration study was similar to the short-term, except that the dosages were lower. In the short-term study, co-administration of the extract and lutein inhibited Nɛ-(carboxymethyl)lysine and Nɛ-(carboxyethyl)lysine in serum. However, in the long-term study, only lutein inhibited Nɛ-(carboxymethyl)lysine and Nɛ-(carboxyethyl)lysine in serum. These results suggest that lutein exerts its long-term effect regardless of the concentration administered, while the extract exerts its effect when its concentration is increased. Relative to the consumption of the control diet, oral intake of the combination of the extract and lutein significantly inhibited the progression of cataractogenesis in the lens of diabetic rats, even at low doses, and the combination was more effective than individual treatments.
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Affiliation(s)
- Sho Kinoshita
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Hikari Sugawa
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Tomoaki Nanri
- Santen Pharmaceutical Co., Ltd., Nihonbashi Muromachi 1-13-7, Chuo-ku, Tokyo 103-0022, Japan
| | - Rei-Ichi Ohno
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Jun-Ichi Shirakawa
- Department of Bioscience School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Hikari Sato
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Nana Katsuta
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Shiori Sakake
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
| | - Ryoji Nagai
- Graduate School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan.,Department of Bioscience School of Agriculture, Tokai University, Toroku 9-1-1, Higashi-ku, Kumamoto 862-8652, Japan
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Zhang Z, Xiao H, Zhou P. Glycation by saccharides of different molecular sizes affected the allergenicity of shrimp tropomyosin via epitope loss and the generation of advanced glycation end products. Food Funct 2019; 10:7042-7051. [PMID: 31580362 DOI: 10.1039/c9fo01547g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Tropomyosin is the most potent allergen of shrimp that can cause severe food allergy. However, to date, an effective approach to eliminate this allergenicity is still lacking. Glycation is a promising approach that can reduce the allergenicity of shrimp tropomyosin by destroying the epitopes; however, advanced glycation end products (AGEs) are also generated during glycation, which can function as neoallergens to strengthen the allergenicity; therefore, it is hard to tell how the glycation of an allergen with different saccharides affects the allergenicity via epitope loss and neoallergen generation. This study was aimed at the elucidation of how the glycation of tropomyosin (TM) with saccharides of different molecular sizes (glucose, maltose, and maltotriose) affected the allergenicity through epitope loss and the generation of neoallergns that belonged to advanced glycation end products (AGEs). Saccharides of higher molecular sizes (maltotriose) could lead to higher glycated TM than saccharides of smaller molecular sizes (glucose and maltose). Compared with TM, the TM glycated by glucose (TM-G) and maltotriose (TM-MTS) had lower allergenicity and contributed to weaker mouse allergy symptoms; on the other hand, the TM glycated by maltose (TM-M) had no significant impact on the allergenicity due to the generation of AGE-related neoallergens, which might offset the glycation-induced epitope loss. The glycation of TM by maltotriose led to lower generation of AGE neoallergens (e.g. CML) than that in the cases of glucose and maltose; therefore, maltotriose could be applied to desensitize TM-induced food allergy through glycation, and this could be a potential immunotherapy for shrimp allergy patients.
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Affiliation(s)
- Ziye Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China. and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China and Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | - Peng Zhou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China. and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China
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Ohno RI, Ichimaru K, Tanaka S, Sugawa H, Katsuta N, Sakake S, Tominaga YK, Ban I, Shirakawa JI, Yamaguchi Y, Ito E, Taniguchi N, Nagai R. Glucoselysine is derived from fructose and accumulates in the eye lens of diabetic rats. J Biol Chem 2019; 294:17326-17338. [PMID: 31594865 DOI: 10.1074/jbc.ra119.010744] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/04/2019] [Indexed: 12/12/2022] Open
Abstract
Prolonged hyperglycemia generates advanced glycation end-products (AGEs), which are believed to be involved in the pathogenesis of diabetic complications. In the present study, we developed a polyclonal antibody against fructose-modified proteins (Fru-P antibody) and identified its epitope as glucoselysine (GL) by NMR and LC-electrospray ionization (ESI)- quadrupole TOF (QTOF) analyses and evaluated its potential role in diabetes sequelae. Although the molecular weight of GL was identical to that of fructoselysine (FL), GL was distinguishable from FL because GL was resistant to acid hydrolysis, which converted all of the FLs to furosine. We also detected GL in vitro when reduced BSA was incubated with fructose for 1 day. However, when we incubated reduced BSA with glucose, galactose, or mannose for 14 days, we did not detect GL, suggesting that GL is dominantly generated from fructose. LC-ESI-MS/MS experiments with synthesized [13C6]GL indicated that the GL levels in the rat eye lens time-dependently increase after streptozotocin-induced diabetes. We observed a 31.3-fold increase in GL 8 weeks after the induction compared with nondiabetic rats, and Nϵ-(carboxymethyl)lysine and furosine increased by 1.7- and 21.5-fold, respectively, under the same condition. In contrast, sorbitol in the lens levelled off at 2 weeks after diabetes induction. We conclude that GL may be a useful biological marker to monitor and elucidate the mechanism of protein degeneration during progression of diabetes.
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Affiliation(s)
- Rei-Ichi Ohno
- Laboratory of Food and Regulation Biology, Graduate School of Bioscience, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Kenta Ichimaru
- Laboratory of Food and Regulation Biology, Graduate School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Seitaro Tanaka
- Laboratory of Food and Regulation Biology, Graduate School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Hikari Sugawa
- Laboratory of Food and Regulation Biology, Graduate School of Bioscience, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Nana Katsuta
- Laboratory of Food and Regulation Biology, Graduate School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Shiori Sakake
- Laboratory of Food and Regulation Biology, Graduate School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Yu-Ki Tominaga
- Laboratory of Food and Regulation Biology, Graduate School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Ikuho Ban
- Laboratory of Food and Regulation Biology, Department of Bioscience, School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Jun-Ichi Shirakawa
- Laboratory of Food and Regulation Biology, Department of Bioscience, School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
| | - Yoshiki Yamaguchi
- Laboratory of Pharmaceutical Physical Chemistry, Tohoku Medical and Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai, Miyagi 981-8558, Japan
| | - Emi Ito
- Department of Diabetic Complications, Diabetes Research Center, Research Institute National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
| | - Naoyuki Taniguchi
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute 3-1-69 Otemae, Chuoku, Osaka, 541-8567, Japan
| | - Ryoji Nagai
- Laboratory of Food and Regulation Biology, Graduate School of Bioscience, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan .,Laboratory of Food and Regulation Biology, Graduate School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan.,Laboratory of Food and Regulation Biology, Department of Bioscience, School of Agriculture, Tokai University, 9-1-1 Toroku, Kumamoto, Higashi-ku, Kumamoto 862-0970, Japan
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Zhao J, Guo H, Li J, Bandodkar AJ, Rogers JA. Body-Interfaced Chemical Sensors for Noninvasive Monitoring and Analysis of Biofluids. TRENDS IN CHEMISTRY 2019. [DOI: 10.1016/j.trechm.2019.07.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Rathore R, Sonwane BP, Jagadeeshaprasad MG, Kahar S, Santhakumari B, Unnikrishnan AG, Kulkarni MJ. Glycation of glucose sensitive lysine residues K36, K438 and K549 of albumin is associated with prediabetes. J Proteomics 2019; 208:103481. [PMID: 31394310 DOI: 10.1016/j.jprot.2019.103481] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/24/2019] [Accepted: 08/01/2019] [Indexed: 12/16/2022]
Abstract
Prediabetes is a risk factor for the development of diabetes. Early diagnosis of prediabetes may prevent the onset and progression of diabetes and its associated complications. Therefore, this study aimed at the identification of novel markers for efficient prediction of prediabetes. In this pursuit, we have evaluated the ability of glycated peptides of albumin in predicting prediabetes. Glycated peptides of in vitro glycated albumin were characterized by data dependent acquisition and parallel reaction monitoring using LC-HRMS. Amongst 14 glycated peptides characterized in vitro, four peptides, particularly, FK(CML)DLGEENFK, K(AML)VPQVSTPTLVEVSR, K(CML)VPQVSTPTLVEVSR, and K(AML)QTALVELVK, corresponding to 3 glucose sensitive lysine residues K36, K438, and K549, respectively showed significantly higher abundance in prediabetes than control. Additionally, the abundance of three of these peptides, namely K(AML)QTALVELVK, K(CML)VPQVSTPTLVEVSR and FK(CML)DLGEENFK was >1.8-fold in prediabetes, which was significantly higher than the differences observed for FBG, PPG, and HbA1c. Further, the four glycated peptides showed a significant correlation with FBG, PPG, HbA1c, triglycerides, VLDL, and HDL. This study supports that glycated peptides of glucose sensitive lysine residues K36, K438 and K549 of albumin could be potentially useful markers for prediction of prediabetes. SIGNIFICANCE: Undiagnosed prediabetes may lead to diabetes and associated complications. This study reports targeted quantification of four glycated peptides particulary FK(CML)DLGEENFK, K(AML)VPQVSTPTLVEVSR, K(CML)VPQVSTPTLVEVSR, and K(AML)QTALVELVK, corresponding to 3 glucose sensitive lysine residues K36, K438 and K549 respectively by parallel reaction monitoring in healthy and prediabetic subjects. These peptides showed significantly higher abundance in prediabetes than healthy subjects, and showed significant correlation with various clinical parameters including FBG, PPG, HbA1c, and altered lipid profile. Therefore, together these four peptides constitute a panel of markers that can be useful for prediction of prediabetes.
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Affiliation(s)
- Rajeshwari Rathore
- Proteomics Facility, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Babasaheb P Sonwane
- Proteomics Facility, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - M G Jagadeeshaprasad
- Proteomics Facility, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | | | - B Santhakumari
- Proteomics Facility, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | | | - Mahesh J Kulkarni
- Proteomics Facility, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.
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Jaggupilli A, Howard R, Aluko RE, Chelikani P. Advanced Glycation End-Products Can Activate or Block Bitter Taste Receptors. Nutrients 2019; 11:nu11061317. [PMID: 31212814 PMCID: PMC6628017 DOI: 10.3390/nu11061317] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 12/14/2022] Open
Abstract
Bitter taste receptors (T2Rs) are expressed in several tissues of the body and are involved in a variety of roles apart from bitter taste perception. Advanced glycation end-products (AGEs) are produced by glycation of amino acids in proteins. There are varying sources of AGEs, including dietary food products, as well as endogenous reactions within our body. Whether these AGEs are T2R ligands remains to be characterized. In this study, we selected two AGEs, namely, glyoxal-derived lysine dimer (GOLD) and carboxymethyllysine (CML), based on their predicted interaction with the well-studied T2R4, and its physiochemical properties. Results showed predicted binding affinities (Kd) for GOLD and CML towards T2R4 in the nM and μM range, respectively. Calcium mobilization assays showed that GOLD inhibited quinine activation of T2R4 with IC50 10.52 ± 4.7 μM, whilst CML was less effective with IC50 32.62 ± 9.5 μM. To characterize whether this antagonism was specific to quinine activated T2R4 or applicable to other T2Rs, we selected T2R14 and T2R20, which are expressed at significant levels in different human tissues. A similar effect of GOLD was observed with T2R14; and in contrast, GOLD and CML activated T2R20 with an EC50 of 79.35 ± 29.16 μM and 65.31 ± 17.79 μM, respectively. In this study, we identified AGEs as novel T2R ligands that caused either activation or inhibition of different T2Rs.
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Affiliation(s)
- Appalaraju Jaggupilli
- Manitoba Chemosensory Biology Research Group, Department of Oral Biology, University of Manitoba, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB R3E 0W4, Canada.
| | - Ryan Howard
- Manitoba Chemosensory Biology Research Group, Department of Oral Biology, University of Manitoba, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB R3E 0W4, Canada.
| | - Rotimi E Aluko
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
| | - Prashen Chelikani
- Manitoba Chemosensory Biology Research Group, Department of Oral Biology, University of Manitoba, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB R3E 0W4, Canada.
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Abdulle A, Inman CK, Saleh A, Noshi M, Galani D, Abdelwareth L, Alsafar H, Elfatih A, Al Shamsi H, Ali R, Li H, Ramasamy R, Schmidt AM, Benbarka MM, Hassan MH. Metabolic dysfunction in Emirati subjects in Abu Dhabi: Relationship to levels of soluble RAGEs. J Clin Transl Endocrinol 2019; 16:100192. [PMID: 31080742 PMCID: PMC6503160 DOI: 10.1016/j.jcte.2019.100192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 01/07/2019] [Accepted: 04/22/2019] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND The United Arab Emirates is experiencing increasing rates of type 2 diabetes (T2D) and its complications. As soluble levels of the receptor for advanced glycation end products, (sRAGE), and endogenous secretory RAGE (esRAGE), the latter an alternatively spliced form of AGER (the gene encoding RAGE), have been reported to be associated with T2D and its complications, we tested for potential relationships between these factors and T2D status in Emirati subjects. METHODS In a case-control study, we recruited Emirati subjects with T2D and controls from the Sheikh Khalifa Medical City in Abu Dhabi. Anthropomorphic characteristics, levels of plasma sRAGE and esRAGE, and routine chemistry variables were measured. RESULTS Two hundred and sixteen T2D subjects and 215 control subjects (mean age, 57.4 ± 12.1 vs. 50.7 ± 15.4 years; P < 0.0001, respectively) were enrolled. Univariate analyses showed that levels of sRAGE were significantly lower in the T2D vs. control subjects (1033.9 ± 545.3 vs. 1169.2 ± 664.1 pg/ml, respectively; P = 0.02). Multivariate analyses adjusting for age, sex, systolic blood pressure, pulse, body mass index, Waist/Hip circumference ratio, fasting blood glucose, HDL, LDL, insulin, triglycerides, Vitamin D and urea levels revealed that the difference in sRAGE levels between T2D and control subjects remained statistically-significant, P = 0.03, but not after including estimated glomerular filtration rate in the model, P = 0.14. There were no significant differences in levels of esRAGE. Levels of plasma insulin were significantly higher in the control vs. the T2D subjects (133.6 ± 149.9 vs. 107.6 ± 93.3 pg/L. respectively; P = 0.01, after adjustment for age and sex). CONCLUSION/DISCUSSION Levels of sRAGE, but not esRAGE, were associated with T2D status in Abu Dhabi, but not after correction for eGFR. Elevated levels of plasma insulin in both control and T2D subjects suggests the presence of metabolic dysfunction, even in subjects without diabetes.
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Key Words
- ADAM10, a disintegrin and metalloproteinase domain-containing protein 10
- AGEs, advanced glycation endproducts
- ARIC, Atherosclerosis Risk in Communities
- BMI, body mass index
- CARDS, Collaborative Atorvastatin Diabetes Study
- CV, coefficient of variation
- DBP, diastolic blood pressure
- ELISA, enzyme-linked immunosorbent assay
- ESRD, end stage renal disease
- FBG, fasting blood glucose
- HDL, high density lipoprotein
- HbA1c, glycosylated hemoglobin
- Insulin resistance
- Kidney function
- LADA, latent autoimmune diabetes of the adult
- LDL, low density lipoprotein
- MMP, matrix metalloproteinase
- RAGE, receptor for advanced glycation endproducts
- Receptor for advanced glycation endproducts (RAGE)
- SBP, systolic blood pressure
- SKMC, Sheikh Khalifa Medical City
- Soluble RAGE (sRAGE)
- T2D, type 2 diabetes
- TG, triglycerides
- Type 2 diabetes
- UAE, United Arab Emirates
- UAEHFS, United Arab Emirates Healthy Futures Study
- W/H ratio, Waist/Hip circumference ratio
- eGFR, estimated glomerular filtration rate
- esRAGE (endogenous secretory RAGE)
- esRAGE, endogenous secretory RAGE
- hsCRP, high sensitivity C-reactive protein
- sRAGE, soluble RAGE
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Affiliation(s)
- Abdishakur Abdulle
- Public Health Research Center, New York University Abu Dhabi, United Arab Emirates
| | - Claire K. Inman
- Public Health Research Center, New York University Abu Dhabi, United Arab Emirates
| | - Abdelkarim Saleh
- Department of Medicine, Sheikh Khalifa Medical City, United Arab Emirates
| | - Mohamed Noshi
- Department of Medicine, Sheikh Khalifa Medical City, United Arab Emirates
| | - Divya Galani
- Public Health Research Center, New York University Abu Dhabi, United Arab Emirates
| | - Laila Abdelwareth
- Department of Pathology, Cleveland Clinic Abu Dhabi, United Arab Emirates
| | - Habiba Alsafar
- Center for Biotechnology, Khalifa University of Science & Technology, Abu Dhabi, United Arab Emirates
- Department of Biomedical Engineering, Khalifa University of Science & Technology, Abu Dhabi, United Arab Emirates
| | - Abubaker Elfatih
- Department of Medicine, Sheikh Khalifa Medical City, United Arab Emirates
| | - Hefsa Al Shamsi
- Department of Medicine, Sheikh Khalifa Medical City, United Arab Emirates
| | - Raghib Ali
- Public Health Research Center, New York University Abu Dhabi, United Arab Emirates
| | - Huilin Li
- Department of Population Health, New York University School of Medicine, NY, USA
| | | | - Ann Marie Schmidt
- Department of Medicine, New York University School of Medicine, NY, USA
| | | | - Mohamed H. Hassan
- Department of Medicine, Sheikh Khalifa Medical City, United Arab Emirates
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Gug IT, Tertis M, Hosu O, Cristea C. Salivary biomarkers detection: Analytical and immunological methods overview. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.02.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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50
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da Silva LF, Skupien EC, Lazzari TK, Holler SR, de Almeida EGC, Zampieri LR, Coutinho SE, Andrades M, Silva DR. Advanced glycation end products (AGE) and receptor for AGE (RAGE) in patients with active tuberculosis, and their relationship between food intake and nutritional status. PLoS One 2019; 14:e0213991. [PMID: 30870511 PMCID: PMC6417785 DOI: 10.1371/journal.pone.0213991] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 03/05/2019] [Indexed: 01/15/2023] Open
Abstract
Introduction The receptor for advanced glycation end products (RAGE) is expressed in normal lungs and is upregulated during infection. AGEs and RAGE cause oxidative stress and apoptosis in lung cells. The objective of this study is to evaluate levels of AGEs and its soluble receptor (sRAGE), and to investigate their relationship with food intake and nutritional status, in a university-affiliated hospital in Brazil. Methods Case-control study, from June 2017 to June 2018. AGE (carboxymethyl lysine, CML) and sRAGE were measured from blood samples by Elisa. Nutritional assessment was performed by body mass index, triceps skin-fold thickness, mid-arm circumference, mid-arm muscle circumference, bioelectrical impedance analysis, and food frequency questionnaire. Results We included in the study 35 tuberculosis (TB) patients and 35 controls. The mean sRAGE levels were higher in TB patients than in controls (68.5 ± 28.1 vs 57.5 ± 24.0 pg/mL; p = 0.046). Among cases that were current smokers, lower sRAGE levels were associated with mortality, evaluated at the end of hospitalization (p = 0.006), and with weight loss (p = 0.034). There was no statistically significant difference in CML levels and diet CML content between cases and controls. Malnutrition was more frequent in cases, but there was no correlation between nutritional parameters and CML or sRAGE levels. Conclusions TB patients had higher sRAGE levels than controls, although it is not clear that this difference is clinically relevant. Also, sRAGE was associated with weight loss and mortality.
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Affiliation(s)
- Lívia Fontes da Silva
- Programa de Pós-Graduação em Ciências Pneumológicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Erika Cavalheiro Skupien
- Programa de Pós-Graduação em Ciências Pneumológicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Tássia Kirchmann Lazzari
- Programa de Pós-Graduação em Ciências Pneumológicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Sizuane Rieger Holler
- Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | - Sandra Eugênia Coutinho
- Programa de Pós-Graduação em Ciências Pneumológicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Denise Rossato Silva
- Programa de Pós-Graduação em Ciências Pneumológicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- * E-mail:
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