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Advanced glycation endproducts

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https://www.readbyqxmd.com/read/28212675/sex-differences-in-the-association-of-skin-advanced-glycation-endproducts-with-knee-osteoarthritis-progression
#1
Charles B Eaton, Maria Sayeed, Syeda Ameernaz, Mary B Roberts, John D Maynard, Jeffrey B Driban, Timothy E McAlindon
BACKGROUND: The accumulation of advanced glycation endproducts in articular cartilage has been suggested as an etiologic factor in the development and progression of knee osteoarthritis (KOA). METHODS: We conducted a prospective cohort study of skin advanced glycation endproducts (sAGEs) measured non-invasively by skin intrinsic fluorescence and the relationship between sAGE KOA progression in 160 men and 287 women in a sub-cohort of the Osteoarthritis Initiative at a single site...
February 17, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28212304/methylglyoxal-derived-advanced-glycation-endproducts-in-multiple-sclerosis
#2
Suzan Wetzels, Kristiaan Wouters, Casper G Schalkwijk, Tim Vanmierlo, Jerome J A Hendriks
Multiple sclerosis (MS) is a demyelinating disease of the central nervous system (CNS). The activation of inflammatory cells is crucial for the development of MS and is shown to induce intracellular glycolytic metabolism in pro-inflammatory microglia and macrophages, as well as CNS-resident astrocytes. Advanced glycation endproducts (AGEs) are stable endproducts formed by a reaction of the dicarbonyl compounds methylglyoxal (MGO) and glyoxal (GO) with amino acids in proteins, during glycolysis. This suggests that, in MS, MGO-derived AGEs are formed in glycolysis-driven cells...
February 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28203223/impaired-axonal-regeneration-in-diabetes-perspective-on-the-underlying-mechanism-from-in-vivo-and-in-vitro-experimental-studies
#3
REVIEW
Kazunori Sango, Hiroki Mizukami, Hidenori Horie, Soroku Yagihashi
Axonal regeneration after peripheral nerve injury is impaired in diabetes, but its precise mechanisms have not been elucidated. In this paper, we summarize the progress of research on altered axonal regeneration in animal models of diabetes and cultured nerve tissues exposed to hyperglycemia. Impaired nerve regeneration in animal diabetes can be attributed to dysfunction of neurons and Schwann cells, unfavorable stromal environment supportive of regenerating axons, and alterations of target tissues receptive to reinnervation...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28188764/modulation-of-cerebral-rage-expression-following-nitric-oxide-synthase-inhibition-in-rats-subjected-to-focal-cerebral-ischemia
#4
Rosaria Greco, Chiara Demartini, Anna Maria Zanaboni, Fabio Blandini, Diana Amantea, Cristina Tassorelli
The receptor for advanced glycation endproducts (RAGE) is a key mediator of neuroinflammation following cerebral ischemia. Nitric oxide (NO) plays a dualistic role in cerebral ischemia, depending on whether it originates from neuronal, inducible or endothelial synthase. Although a dynamic interplay between RAGE and NO pathways exists, its relevance in ischemic stroke has not been investigated. The aim of this study is to evaluate the effect of the NO synthase (NOS) inhibition on RAGE expression in rats subjected to transient middle cerebral artery occlusion (tMCAo)...
February 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28183700/2016-atvb-plenary-lecture-receptor-for-advanced-glycation-endproducts-and-implications-for-the-pathogenesis-an-treatment-of-cardiometabolic-disorders-spotlight-on-the-macrophage
#5
REVIEW
Ann Marie Schmidt
The receptor for advanced glycation endproducts (RAGE) interacts with a unique repertoire of ligands that form and collect in the tissues and circulation in diabetes mellitus, aging, inflammation, renal failure, and obesity. RAGE is expressed on multiple cell types linked to tissue perturbation in these settings. This brief review focuses on the role of RAGE in monocytes/macrophages and how RAGE ligand engagement on these cells mediates seminal changes in monocyte/macrophage migration, oxidative stress, cholesterol efflux, and pro- versus anti-inflammatory cues that signal to tissue damage...
February 9, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28177049/n-acetyl-cysteine-inhibits-liver-oxidative-stress-markers-in-balb-c-mice-infected-with-leishmania-amazonensis
#6
Juciano Gasparotto, Alice Kunzler, Mario Roberto Senger, Celeste da Silva Freitas de Souza, Salvatore Giovanni de Simone, Rafael Calixto Bortolin, Nauana Somensi, Felipe Dal-Pizzol, José Claudio Fonseca Moreira, Ana Lúcia Abreu-Silva, Kátia da Silva Calabrese, Floriano Paes Silva, Daniel Pens Gelain
BACKGROUND: Leishmaniasis is a parasitosis caused by several species of the genus Leishmania. These parasites present high resistance against oxidative stress generated by inflammatory cells. OBJECTIVES: To investigate oxidative stress and molecular inflammatory markers in BALB/c mice infected with L. amazonensis and the effect of antioxidant treatment on these parameters. METHODS: Four months after infection, oxidative and inflammatory parameters of liver, kidneys, spleen, heart and lungs from BALB/c mice were assessed...
February 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28167471/effect-of-viscum-schimperi-on-advanced-glycation-endproducts-formation
#7
Hossam Mohamed Abdallah, Doha Omar ALGhamdi, Maab Siddiq Al-Salem, Maryam Alattas, Hany Mohamed El-Bassossy, Abdulrahman Mohammed Alahdal, Ibrahim Ateya Shehata, Essam Abdel-Sattar
Diabetes is a disease characterized by elevated uncontrolled glucose level. Hyperglycemia results in diabetic complication due to a reaction between sugar and amino acid of proteins to form advanced glycation endproducts (AGEs) in different tissues. Medicinal plants are considered as a great source of bioactive compounds that affect many ailments. In this regard; AGEs formation could be inhibited by many bioactive compounds isolated from medicinal plants. Viscum schimperi Engl. is a plant belongs to Loranthaceae and known for its antidiabetic activity...
November 2016: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28163201/the-receptor-for-advanced-glycation-end-products-rage-is-involved-in-corneal-healing
#8
Norbert Nass, Stefanie Trau, Friedrich Paulsen, Delia Kaiser, Thomas Kalinski, Saadettin Sel
Impaired corneal healing is still a major cause of blindness. As RAGE (receptor for advanced glycation endproducts) is involved in inflammation and wound healing in other tissues, we here investigated its relevance for corneal wound healing. Corneal re-epithelialization after alkaline injury was analysed in an ex-vivo approach with cultured, enucleated eyes from mice either of the C57Bl/6 NChR genotype (RAGE+/+) and mice of the same strain lacking the RAGE gene (RAGE-/-). The wound area was determined time dependently by fluorescence imaging using fluorescein staining...
February 3, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28157169/chemical-reactivity-theory-study-of-advanced-glycation-endproduct-inhibitors
#9
Juan Frau, Daniel Glossman-Mitnik
Several compounds with the known ability to perform as inhibitors of advanced glycation endproducts (AGE) have been studied with Density Functional Theory (DFT) through the use of anumberofdensityfunctionalswhoseaccuracyhasbeentestedacrossabroadspectrumofdatabases in Chemistry and Physics. The chemical reactivity descriptors for these systems have been calculated through Conceptual DFT in an attempt to relate their intrinsic chemical reactivity with the ability to inhibit the action of glycating carbonyl compounds on amino acids and proteins...
February 2, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28123638/nicousamide-protects-kidney-podocyte-by-inhibiting-the-tgf%C3%AE-receptor-ii-phosphorylation-and-age-rage-signaling
#10
Sen Zhang, Dongjie Wang, Nina Xue, Fangfang Lai, Ming Ji, Jing Jin, Xiaoguang Chen
Nicousamide, a clinical phase II renal protective new drug, has been demonstrated to have renal protective effect on diabetic nephropathy (DN) by experimental animal model. Its known molecular mechanisms include AGE formation blocking and moderately decreasing the blood pressure. Nicousamide shows potential on attenuating albuminuria, thereby suggests it might have protective effect on podocytes. The aim of present study was to investigate whether nicousamide could protect integrity of podocytes, and further its protection mechanisms...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28123156/scientific-evidence-for-therapeutic-effects-of-chinese-prescription-kangen-karyu-from-pre-clinical-animal-experiments
#11
Takako Yokozawa, Chan Hum Park, Kinzo Matsumoto
Chinese prescription Kangen-karyu, comprised of six crude drugs, has received much attention due to its numerous biological activities. The present study reports therapeutic evidence for Kangen-karyu from pre-clinical animal experiments related to human diseases. Kangen-karyu showed beneficial effects on type 1 diabetes and related complications through the suppression of protein expression related to advanced glycation endproducts and oxidative stress. Kangen-karyu reduced oxidative stress via the regulation of dyslipidemia, and also exerted a renoprotective effect mainly through its antioxidant properties during the development of diabetic nephropathy in type 2 diabetes...
January 26, 2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/28112327/anti-glycation-and-anti-oxidative-effects-of-a-phenolic-enriched-maple-syrup-extract-and-its-protective-effects-on-normal-human-colon-cells
#12
Weixi Liu, Zhengxi Wei, Hang Ma, Ang Cai, Yongqiang Liu, Jiadong Sun, Nicholas A DaSilva, Shelby L Johnson, Louis J Kirschenbaum, Bongsup P Cho, Joel A Dain, David C Rowley, Zahir A Shaikh, Navindra P Seeram
Oxidative stress and free radical generation accelerate the formation of advanced glycation endproducts (AGEs) which are linked to several chronic diseases. Published data suggest that phenolic-rich plant foods, show promise as natural anti-AGEs agents due to their anti-oxidation capacities. A phenolic-enriched maple syrup extract (MSX) has previously been reported to show anti-inflammatory and neuroprotective effects but its anti-AGE effects remain unknown. Therefore, herein, we investigated the anti-glycation and anti-oxidation effects of MSX using biochemical and biophysical methods...
January 23, 2017: Food & Function
https://www.readbyqxmd.com/read/28099113/rage-deficiency-predisposes-mice-to-virus-induced-paucigranulocytic-asthma
#13
Jaisy Arikkatt, Md Ashik Ullah, Kirsty Renfree Short, Vivan Zhang, Wan Jun Gan, Zhixuan Loh, Rhiannon B Werder, Jennifer Simpson, Peter D Sly, Stuart B Mazzone, Kirsten M Spann, Manuel Ar Ferreira, John W Upham, Maria B Sukkar, Simon Phipps
Asthma is a chronic inflammatory disease. Although many patients with asthma develop type-2 dominated eosinophilic inflammation, a number of individuals develop paucigranulocytic asthma, which occurs in the absence of eosinophilia or neutrophilia. The aetiology of paucigranulocytic asthma is unknown. However, both respiratory syncytial virus (RSV) infection and mutations in the receptor for advanced glycation endproducts (RAGE) are risk factors for asthma development. Here, we show that RAGE deficiency impairs anti-viral immunity during an early-life infection with pneumonia virus of mice (PVM; a murine analogue of RSV)...
January 18, 2017: ELife
https://www.readbyqxmd.com/read/28088659/altered-cerebral-insulin-response-in-transgenic-mice-expressing-the-epsilon-4-allele-of-the-human-apolipoprotein-e-gene
#14
Marie-Thérèse Traversy, Milène Vandal, Cyntia Tremblay, Marine Tournissac, Ariane Giguère-Rancourt, A David Bennett, Frédéric Calon
Apolipoprotein E epsilon-4 (APOEε4 or APOE4), an allelic variation of the APOE gene, not only increases the risk of developing the late-onset form of Alzheimer's disease (AD), but also influences the outcome of treatment. Indeed, data from clinical studies show that the beneficial effect of insulin on cognition is blunted in APOE4 carriers. To investigate how APOE impacts insulin response, we assessed the effects of an acute insulin injection in APOE3- and APOE4-targeted replacement mice that respectively express the human APOE3 or APOE4 isoform instead of the endogenous murine ApoE protein...
November 30, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28088642/anti-rage-antibody-selectively-blocks-acute-systemic-inflammatory-responses-to-lps-in-serum-liver-csf-and-striatum
#15
Juciano Gasparotto, Camila Tiefensee Ribeiro, Rafael Calixto Bortolin, Nauana Somensi, Henrique Schaan Fernandes, Alexsander Alves Teixeira, Marcelo Otavio Rodrigues Guasselli, Crepin Aziz Jose O Agani, Natália Cabral Souza, Mateus Grings, Guilhian Leipnitz, Henrique Mautone Gomes, Matheus Augusto de Bittencourt Pasquali, Peter R Dunkley, Phillip W Dickson, José Claudio Fonseca Moreira, Daniel Pens Gelain
Systemic inflammation induces transient or permanent dysfunction in the brain by exposing it to soluble inflammatory mediators. The receptor for advanced glycation endproducts (RAGE) binds to distinct ligands mediating and increasing inflammatory processes. In this study we used an LPS-induced systemic inflammation model in rats to investigate the effect of blocking RAGE in serum, liver, cerebrospinal fluid (CSF) and brain (striatum, prefrontal cortex, ventral tegmental area and substantia nigra). Intraperitoneal injection of RAGE antibody (50μg/kg) was followed after 1h by a single LPS (5mg/kg) intraperitoneal injection...
January 11, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28069685/associations-of-body-mass-index-with-laboratory-and-biomarkers-in-patients-with-acute-heart-failure
#16
Koen W Streng, Jozine M Ter Maaten, John G Cleland, Christopher M O'Connor, Beth A Davison, Marco Metra, Michael M Givertz, John R Teerlink, Piotr Ponikowski, Daniel M Bloomfield, Howard C Dittrich, Hans L Hillege, Dirk J van Veldhuisen, Adriaan A Voors, Peter van der Meer
BACKGROUND: Plasma concentrations of natriuretic peptides decline with obesity in patients with heart failure. Whether this is true for other biomarkers is unknown. We investigated a wide range of biomarker profiles in acute heart failure across the body mass index (BMI) spectrum. METHODS AND RESULTS: A total of 48 biomarkers, assessing multiple pathophysiological pathways, were measured in 2033 patients included in PROTECT (Placebo-Controlled Randomized Study of the Selective A1 Adenosine Receptor Antagonist Rolofylline for Patients Hospitalized With Acute Decompensated Heart Failure and Volume Overload to Assess Treatment Effect on Congestion and Renal Function), a trial comparing the effects of rolofylline to placebo in patients with acute heart failure...
January 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28051097/aged-garlic-has-more-potent-antiglycation-and-antioxidant-properties-compared-to-fresh-garlic-extract-in-vitro
#17
Abdulhakim Elosta, Mark Slevin, Khalid Rahman, Nessar Ahmed
Protein glycation involves formation of early (Amadori) and late advanced glycation endproducts (AGEs) together with free radicals via autoxidation of glucose and Amadori products. Glycation and increased free radical activity underlie the pathogenesis of diabetic complications. This study investigated whether aged garlic has more potent antiglycation and antioxidant properties compared to fresh garlic extract in vitro in a cell-free system. Proteins were glycated by incubation with sugars (glucose, methylglyoxal or ribose) ±5-15 mg/mL of aged and fresh garlic extracts...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28012919/ilex-paraguariensis-and-its-main-component-chlorogenic-acid-inhibit-fructose-formation-of-advanced-glycation-endproducts-with-amino-acids-at-conditions-compatible-with-those-in-the-digestive-system
#18
Yasmin Bains, Alejandro Gugliucci
We have previously shown that Ilex paraguariensis extracts have potent antiglycation actions. Associations of excess free fructose consumption with inflammatory diseases have been proposed to be mediated through in situ enteral formation of fructose AGEs, which, after being absorbed may contribute to inflammatory diseases via engagement of RAGE. In this proof of principle investigation we show fluorescent AGE formation between amino acids (Arg, Lys, Gly at 10-50mM) and fructose (10-50mM) under time, temperature, pH and concentrations compatible with the digestive system lumen and its inhibition by Ilex paraguariensis extracts...
December 22, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27965400/decreased-levels-of-srage-in-follicular-fluid-from-patients-with-pcos
#19
BiJun Wang, Jing Li, Qingling Yang, FuLi Zhang, MengMeng Hao, Yi-Hong Guo
This study aimed to explore the association between soluble receptor for advanced glycation endproducts (sRAGE) levels in follicular fluid and the number of oocytes retrieved and to evaluate the effect of sRAGE on vascular endothelial growth factor (VEGF) in granulosa cells in patients with polycystic ovarian syndrome (PCOS). Two sets of experiments were performed in this study. In part one, sRAGE and VEGF protein levels in follicular fluid samples from 39 patients with PCOS and 35 non-PCOS patients were measured by ELISA...
December 13, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27965099/glucagon-like-peptide-1-inhibits-the-receptor-for-advanced-glycation-endproducts-to-prevent-podocyte-apoptosis-induced-by-advanced-oxidative-protein-products
#20
Shuang-Shuang Zhang, Zhou Wu, Zhen Zhang, Zhou-Yi Xiong, Hong Chen, Qiao-Bing Huang
OBJECTIVE: To investigate whether and how glucagon-like peptide-1 (GLP-1) can protect podocytes from apoptosis induced by advanced oxidative protein products (AOPPs). METHODS: Murine podocytes were stimulated with 200 μg/ml AOPP for 48 h in the presence or absence of GLP-1. Cell viability was assessed using the cell counting kit-8 assay. Podocyte apoptosis was detected by flow cytometry and Hoechst 33258 staining. Superoxide radical production was assayed using lucigenin-enhanced chemiluminescence, and Western blotting was used to measure expression of RAGE, NADPH oxidase subunits p47(phox) and gp91(phox), as well as apoptosis-associated proteins p53, Bax, Bcl-2 and caspase-3...
January 22, 2017: Biochemical and Biophysical Research Communications
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