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Advanced glycation endproducts

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https://www.readbyqxmd.com/read/29337308/rage-binds-preamyloid-iapp-intermediates-and-mediates-pancreatic-%C3%AE-cell-proteotoxicity
#1
Andisheh Abedini, Ping Cao, Annette Plesner, Jinghua Zhang, Meilun He, Julia Derk, Sachi A Patil, Rosa Rosario, Jacqueline Lonier, Fei Song, Hyunwook Koh, Huilin Li, Daniel P Raleigh, Ann Marie Schmidt
Islet amyloidosis is characterized by the aberrant accumulation of islet amyloid polypeptide (IAPP) in pancreatic islets, resulting in β cell toxicity, which exacerbates type 2 diabetes and islet transplant failure. It is not fully clear how IAPP induces cellular stress or how IAPP-induced toxicity can be prevented or treated. We recently defined the properties of toxic IAPP species. Here, we have identified a receptor-mediated mechanism of islet amyloidosis-induced proteotoxicity. In human diabetic pancreas and in cellular and mouse models of islet amyloidosis, increased expression of the receptor for advanced glycation endproducts (RAGE) correlated with human IAPP-induced (h-IAPP-induced) β cell and islet inflammation, toxicity, and apoptosis...
January 16, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29281127/bone-tissue-collagen-maturity-and-mineral-content-increase-with-sustained-hyperglycemia-in-the-kk-ay-murine-model-of-type-2-diabetes
#2
Heather B Hunt, Jared C Pearl, David R Diaz, Karen B King, Eve Donnelly
Type 2 diabetes mellitus (T2DM) increases fracture risk for a given bone mineral density, which suggests that T2DM changes bone tissue properties independently of bone mass. In this study, we assessed the effects of hyperglycemia on bone tissue compositional properties, enzymatic collagen crosslinks, and advanced glycation endproducts (AGEs) in the KK-Ay murine model of T2DM using Fourier transform infrared imaging and high-performance liquid chromatography. Compared to KK-aa littermate controls (n = 8), proximal femoral bone tissue of KK-Ay mice (n = 14) exhibited increased collagen maturity, increased mineral content, and less heterogeneous mineral properties...
December 27, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29274622/inhibition-of-the-receptor-for-advanced-glycation-promotes-proliferation-and-repair-of-human-periodontal-ligament-fibroblasts-in-response-to-high-glucose-via-the-nf-%C3%AE%C2%BAb-signaling-pathway
#3
Danting Zhan, Ling Guo, Lige Zheng
OBJECTIVE: To observe if inhibition of the receptor for advanced glycation endproducts (RAGE) promotes proliferation and repair of human periodontal ligament fibroblasts (hPDLFs) stimulated by high glucose. In addition, we also discuss the effects of the NF-κB signaling pathway in relation to this process. METHODS: Primary cultured hPDLFs were exposed to either low glucose (5.5 mmol/L) or high glucose (25 mmol/L), and RAGE expression was measured by Western blot analysis...
December 16, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29259621/the-age-rage-axis-implications-for-age-associated-arterial-diseases
#4
REVIEW
Laura M Senatus, Ann Marie Schmidt
The process of advanced glycation leads to the generation and accumulation of an heterogeneous class of molecules called advanced glycation endproducts, or AGEs. AGEs are produced to accelerated degrees in disorders such as diabetes, renal failure, inflammation, neurodegeneration, and in aging. Further, AGEs are present in foods and in tobacco products. Hence, through both endogenous production and exogenous consumption, AGEs perturb vascular homeostasis by a number of means; in the first case, AGEs can cause cross-linking of long-lived molecules in the basement membranes such as collagens, thereby leading to "vascular stiffening" and processes that lead to hyperpermeability and loss of structural integrity...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/29242907/skin-intrinsic-fluorescence-and-age-related-macular-degeneration-the-beaver-dam-eye-study
#5
Ronald Klein, Kristine E Lee, John D Maynard, Stacy M Meuer, Ronald E Gangnon, Barbara E K Klein
Purpose: To determine if skin intrinsic fluorescence (SIF), a noninvasive measure of advanced glycation endproducts and oxidative stress in skin is associated with AMD. Methods: SIF was measured with the SCOUT DS skin fluorescence spectrometer in a cross-sectional cohort study of 969 persons aged 68 to 102 years from the 1181 who participated in the 25-year follow-up examination in the Beaver Dam Eye Study (BDES) in 2014 to 2016. The SCOUT DS skin fluorescence spectrometer uses five light-emitting diodes, centered at 375 nm to 456 nm...
December 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29215715/hmgb1-contributes-to-the-irradiation-induced-endothelial-barrier-injury-through-receptor-for-advanced-glycation-endproducts-rage
#6
Haihong Zhou, Congli Jin, Lili Cui, Huaijie Xing, Jun Liu, Wang Liao, Haojie Liao, Yangsheng Yu
This study aimed to investigate whether HMGB1 (high mobility group box-1 protein) and receptor for advanced glycation end products (RAGE) were involved in the irradiation-induced endothelial barrier damage and their mechanism. We constructed the damage model of endothelium barrier model with bEnd.3 cells. The permeability of endothelial barrier was detected by sodium fluorescein (Na-F) permeation test, and the irradiation dose which could induce permeability transition was determined by being exposed to different irradiation doses (5Gy, 10Gy, 15Gy, 20Gy)...
December 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29204365/the-age-rage-axis-in-an-arab-population-the-united-arab-emirates-healthy-futures-uaehfs-pilot-study
#7
Claire K Inman, Abdullah Aljunaibi, Hyunwook Koh, Abdishakur Abdulle, Raghib Ali, Abdullah Alnaeemi, Eiman Al Zaabi, Naima Oumeziane, Marina Al Bastaki, Mohammed Al-Houqani, Fatma Al-Maskari, Ayesha Al Dhaheri, Syed M Shah, Laila Abdel Wareth, Wael Al Mahmeed, Habiba Alsafar, Fatme Al Anouti, Ayesha Al Hosani, Muna Haji, Divya Galani, Matthew J O'Connor, Jiyoung Ahn, Tomas Kirchhoff, Scott Sherman, Richard B Hayes, Huilin Li, Ravichandran Ramasamy, Ann Marie Schmidt
Aims: The transformation of the United Arab Emirates (UAE) from a semi-nomadic to a high income society has been accompanied by increasing rates of obesity and Type 2 diabetes mellitus. We examined if the AGE-RAGE (receptor for advanced glycation endproducts) axis is associated with obesity and diabetes mellitus in the pilot phase of the UAE Healthy Futures Study (UAEHFS). Methods: 517 Emirati subjects were enrolled and plasma/serum levels of AGE, carboxy methyl lysine (CML)-AGE, soluble (s)RAGE and endogenous secretory (es)RAGE were measured along with weight, height, waist and hip circumference (WC/HC), blood pressure, HbA1c, Vitamin D levels and routine chemistries...
December 2017: Journal of Clinical & Translational Endocrinology
https://www.readbyqxmd.com/read/29197515/fingolimod-anti-inflammatory-and-neuroprotective-effects-modulation-of-rage-axis-in-multiple-sclerosis-patients
#8
Zohara Sternberg, Channa Kolb, Kailash Chadha, Adam Nir, Raphael Nir, Rayan George, Joseph Johnson, Jinhee Yu, David Hojnacki
BACKGROUND: We investigated Fingolimod treatment effects on the RAGE (receptor for advanced glycation endproducts) axis in multiple sclerosis (MS) patients. The primary outcome of the study was whether Fingolimod treatment increases serum levels of the soluble RAGE isoforms, sRAGE and esRAGE - both being considered putative endogenous inhibitors of RAGE signaling. Additional variables were serum levels of RAGE ligands, the high mobility group box (HMGB)1 and pentosidine. METHODS: Serum levels of the study variables were measured by ELISA, and compared between baseline (before Fingolimod treatment) and 6 and 12 months post-drug treatment in 17 relapsing MS patients...
March 1, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29196860/role-of-thrombin-in-soluble-thrombomodulin-induced-suppression-of-peripheral-hmgb1-mediated-allodynia-in-mice
#9
Ryuichi Tsujita, Maho Tsubota, Yusuke Hayashi, Haruka Saeki, Fumiko Sekiguchi, Atsufumi Kawabata
High mobility group box 1 (HMGB1), a nuclear protein, once released into the extracellular space under pathological conditions, plays a pronociceptive role in redox-dependent distinct active forms, all-thiol HMGB1 (at-HMGB1) and disulfide HMGB1 (ds-HMGB1), that accelerate nociception through the receptor for advanced glycation endproducts (RAGE) and Toll-like receptor 4 (TLR4), respectively. Thrombomodulin (TM), an endothelial membrane protein, and soluble TM, known as TMα, promote thrombin-mediated activation of protein C and also sequester HMGB1, which might facilitate thrombin degradation of HMGB1...
December 1, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/29174818/inhibition-of-advanced-glycation-endproduct-age-rescues-against-streptozotocin-induced-diabetic-cardiomyopathy-role-of-autophagy-and-er-stress
#10
Zhaohui Pei, Qinqin Deng, Sara A Babcock, Emily Y He, Jun Ren, Yingmei Zhang
Diabetes mellitus leads to oxidative stress and contractile dysfunction in the heart. Although several rationales have been speculated, the precise mechanism behind diabetic cardiomyopathy remains elusive. This study was designed to assess the role of inhibition of advanced glycation endproducts (AGE) in streptozotocin (STZ)-induced diabetic cardiac dysfunction. Cardiac contractile function was assessed in normal C57BL/6 and STZ (200mg/kg, single injection and maintained for 2 wks)-induced diabetic mice treated with or without the AGE inhibitor aminoguanidine (50mg/kg/d in drinking water) for 2 weeks using echocardiography and IonOptix MyoCam techniques...
November 22, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29170525/advanced-glycation-endproducts-link-inflammatory-cues-to-upregulation-of-galectin-1-in-diabetic-retinopathy
#11
Atsuhiro Kanda, Yoko Dong, Kousuke Noda, Wataru Saito, Susumu Ishida
Diabetic retinopathy (DR) is an inflammatory and progressive vaso-occlusive disease resulting in angiogenesis. Galectin-1 is a hypoxia-induced angiogenic factor associated with cancer and proliferative DR. Here we reveal a significant upregulation of galectin-1 in eyes of DR patients along with progression of clinical stages beginning from the pre-ischemic, inflammatory stage with diabetic macular edema, but not in eyes with non-diabetic retinal vascular occlusions. As for its regulatory mechanism unrelated to hypoxia but selective to DR, in vitro galectin-1/LGALS1 expression was shown to increase after application to Müller glial cells with interleukin (IL)-1β, which was induced in monocyte-derived macrophages and microglial cells via toll-like receptor (TLR) 4 signaling stimulated by advanced glycation endproducts (AGE)...
November 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29168862/inhibition-of-advanced-glycation-endproducts-during-fish-sausage-preparation-by-transglutaminase-and-chitosan-oligosaccharides-induced-enzymatic-glycosylation
#12
Jing Wang, Long Zou, Fangzhou Yuan, Liangtao Lv, Shenglan Tian, Zhenxing Li, Hong Lin
Advanced glycation endproducts (AGEs) are the harmful products of non-enzymatic reactions in foods formed during the heating process. In order to reduce the content of AGEs in foods, the inhibitory effect of different proportions of transglutaminase (TGase) and chitosan oligosaccharides (COS) on the AGEs of seabream fish meat sausage was studied. The results indicated that the TGase/COS ratio of 1 : 1 could inhibit the formation of AGEs, showing especially a decreased N(ε)-carboxymethyl-lysine (CML) content and a twice higher inhibition rate (36...
November 23, 2017: Food & Function
https://www.readbyqxmd.com/read/29162431/adenine-accelerated-the-diabetic-wound-healing-by-ppar-delta-and-angiogenic-regulation
#13
Jyh-Gang Leu, Ming-Hsing Chiang, Chao-Yi Chen, Jiun-Tsai Lin, Han-Min Chen, Yen-Lin Chen, Yao-Jen Liang
Wound healing is one of the major complications of diabetes, and problems with wound healing in diabetics often lead to amputation and even death. AMP-activated protein kinase (AMPK) is a protein involved in intracellular metabolism. Activated AMPK can reduce visceral fat and cholesterol synthesis and even inhibit hepatic gluconeogenesis. Activation of AMPK has been widely used in the treatment of type II diabetes. We applied an AMPK activator (Adenine) to human fibroblasts and to the wounds of streptozotocin-induced diabetic mice...
November 18, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29160901/dietary-advanced-glycation-end-products-have-sex-and-age-dependent-effects-on-vertebral-bone-microstructure-and-mechanical-function-in-mice
#14
Svenja Illien-Jünger, Paolo Palacio-Mancheno, William F Kindschuh, Xue Chen, Grazyna E Sroga, Deepak Vashishth, James C Iatridis
Back pain is a leading cause of global disability that can arise from vertebral fracture and osteoporosis. While poor general health and obesity are among the strongest risk factors for back pain, there is remarkably little known about how diet influences spinal diseases. Advanced glycation endproducts (AGEs) are implicated in increased fracture risk, yet no studies investigated how dietary AGEs affect spinal health. We tested the hypothesis that high dietary AGE ingestion will diminish vertebral structure and function in a sex- and age-dependent manner...
November 21, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29160796/role-of-galectin-3-in-bone-cell-differentiation-bone-pathophysiology-and-vascular-osteogenesis
#15
REVIEW
Carla Iacobini, Claudia Blasetti Fantauzzi, Giuseppe Pugliese, Stefano Menini
Galectin-3 is expressed in various tissues, including the bone, where it is considered a marker of chondrogenic and osteogenic cell lineages. Galectin-3 protein was found to be increased in the differentiated chondrocytes of the metaphyseal plate cartilage, where it favors chondrocyte survival and cartilage matrix mineralization. It was also shown to be highly expressed in differentiating osteoblasts and osteoclasts, in concomitance with expression of osteogenic markers and Runt-related transcription factor 2 and with the appearance of a mature phenotype...
November 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156655/the-role-of-glyoxalase-i-glo-i-advanced-glycation-endproducts-ages-and-their-receptor-rage-in-chronic-liver-disease-and-hepatocellular-carcinoma-hcc
#16
REVIEW
Marcus Hollenbach
Glyoxalase-I (Glo-I) and glyoxalase-II (Glo-II) comprise the glyoxalase system and are responsible for the detoxification of methylglyoxal (MGO). MGO is formed non-enzymatically as a by-product, mainly in glycolysis, and leads to the formation of advanced glycation endproducts (AGEs). AGEs bind to their receptor, RAGE, and activate intracellular transcription factors, resulting in the production of pro-inflammatory cytokines, oxidative stress, and inflammation. This review will focus on the implication of the Glo-I/AGE/RAGE system in liver injury and hepatocellular carcinoma (HCC)...
November 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29142432/inhibition-of-glycation-induced-cytotoxicity-protein-glycation-and-activity-of-proteolytic-enzymes-by-extract-from-perovskia-atriplicifolia-roots
#17
Mehran Miroliaei, Akram Aminjafari, Sylwester Ślusarczyk, Izabela Nawrot-Hadzik, Mehdi Rahimmalek, Adam Matkowski
Background: Protein glycation and glycotoxicity belong to the main oxidative-stress related complications in diabetes. Perovskia species are used in Asian folk medicine as antidiabetic herbs. Objective: The aim of this study was to verify the ability of the methanolic extract from Perovskia atriplicifolia Benth. roots to diminish glycation of albumin and to prevent cell damage in vitro. Furthermore, we tested the extract for in vitro antioxidant activity and inhibition of elastase and collagenase...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29137475/metformin-attenuates-myocardium-dicarbonyl-stress-induced-by-chronic-hypertriglyceridemia
#18
H Malinska, V Škop, J Trnovska, I Markova, P Svoboda, L Kazdova, M Haluzik
Reactive dicarbonyls stimulate production of advanced glycation endproducts, increase oxidative stress and inflammation and contribute to the development of vascular complications. We measured concentrations of dicarbonyls - methylglyoxal (MG), glyoxal (GL) and 3-deoxyglucosone (3-DG) - in the heart and kidney of a model of metabolic syndrome - hereditary hypertriglyceridemic rats (HHTg) and explored its modulation by metformin. Adult HHTg rats were fed a standard diet with or without metformin (300 mg/kg b...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29136166/diabetes-induced-hyperglycemia-impairs-male-reproductive-function-a-systematic-review
#19
Constanze C Maresch, Dina C Stute, Marco G Alves, Pedro F Oliveira, David M de Kretser, Thomas Linn
BACKGROUND: Hyperglycemia can result from a loss of pancreatic beta-cells or a decline in their function leading to decreased insulin secretion or may arise from insulin resistance and variable degrees of inadequate insulin secretion resulting in diabetes and related comorbidities. To date several reviews have addressed the issue of diabetes-related male infertility but most have focused on how metabolic syndrome causes the decline in male fertility. However, a comprehensive overview as to how diabetes-induced hyperglycemia impairs male fertility is missing...
November 10, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/29127203/receptor-for-advanced-glycation-endproducts-mediates-sepsis-triggered-amyloid-%C3%AE-accumulation-tau-phosphorylation-and-cognitive-impairment
#20
Juciano Gasparotto, Carolina S Girardi, Nauana Somensi, Camila T Ribeiro, José C F Moreira, Monique Michels, Beatriz Sonai, Mariane Rocha, Amanda V Steckert, Tatiana Barichello, João Quevedo, Felipe Dal-Pizzol, Daniel P Gelain
Patients recovering from sepsis have higher rates of CNS morbidities associated with long-lasting impairment of cognitive functions, including neurodegenerative diseases. However, the molecular etiology of these sepsis-induced impairments is unclear. Here, we investigated the role of the receptor for advanced glycation end products (RAGE) in neuroinflammation, neurodegeneration-associated changes, and cognitive dysfunction arising after sepsis recovery. Adult Wistar rats underwent cecal ligation and perforation (CLP), and serum and brain (hippocampus and prefrontal cortex) samples were obtained at days 1, 15, and 30 after the CLP...
November 10, 2017: Journal of Biological Chemistry
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