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Advanced glycation end products

Ali Hafez Ali Mohammed El-Far, Seiichi Munesue, Ai Harashima, Akira Sato, Mika Shindo, Shingo Nakajima, Mana Inada, Mariko Tanaka, Akihiko Takeuchi, Hiroyuki Tsuchiya, Hiroshi Yamamoto, Hazem M E Shaheen, Yasser S El-Sayed, Shuhei Kawano, Sei-Ichi Tanuma, Yasuhiko Yamamoto
Receptor for advanced glycation end-products (RAGE) is a pattern recognition receptor implicated in the pathogenesis of certain types of cancer. In the present study, papaverine was identified as a RAGE inhibitor using the conversion to small molecules through optimized-peptide strategy drug design system. Papaverine significantly inhibited RAGE-dependent nuclear factor κ-B activation driven by high mobility group box-1, a RAGE ligand. Using RAGE- or dominant-negative RAGE-expressing HT1080 human fibrosarcoma cells, the present study revealed that papaverine suppressed RAGE-dependent cell proliferation and migration dose-dependently...
April 2018: Oncology Letters
Xin Xue, Xingxing Chen, Weili Fan, Guan Wang, Liang Zhang, Zongfeng Chen, Peng Liu, Mingyong Liu, Jianhua Zhao
High-mobility group box 1 (HMGB1) facilitates neural stem cells (NSCs) proliferation and differentiation into neuronal linage. However, the effect of HMGB1 on NSCs migration is still elusive. The present study is to investigate the corelation between HMGB1 and NSCs migration and the potential mechanism. The results indicated that 1 ng/ml HMGB1 promoted NSCs proliferation using CCK8 assays. Moreover, data showed that 1 ng/ml HMGB1 facilitated NSCs migration via filopodia formation using phase-contrast and transwell assays...
March 14, 2018: Scientific Reports
Stefan Roth, Vikramjeet Singh, Steffen Tiedt, Lisa Schindler, Georg Huber, Arie Geerlof, Daniel J Antoine, Antoine Anfray, Cyrille Orset, Maxime Gauberti, Antoine Fournier, Lesca M Holdt, Helena Erlandsson Harris, Britta Engelhardt, Marco E Bianchi, Denis Vivien, Christof Haffner, Jürgen Bernhagen, Martin Dichgans, Arthur Liesz
Stroke induces a multiphasic systemic immune response, but the consequences of this response on atherosclerosis-a major source of recurrent vascular events-have not been thoroughly investigated. We show that stroke exacerbates atheroprogression via alarmin-mediated propagation of vascular inflammation. The prototypic brain-released alarmin high-mobility group box 1 protein induced monocyte and endothelial activation via the receptor for advanced glycation end products (RAGE)-signaling cascade and increased plaque load and vulnerability...
March 14, 2018: Science Translational Medicine
Raffaella Mastrocola, Ilario Ferrocino, Erica Liberto, Fausto Chiazza, Alessia Sofia Cento, Debora Collotta, Giulia Querio, Debora Nigro, Valeria Bitonto, Juan Carlos Cutrin, Kalliopi Rantsiou, Mariaconcetta Durante, Emanuela Masini, Manuela Aragno, Chiara Cordero, Luca Cocolin, Massimo Collino
Despite clinical findings suggesting that the form (liquid versus solid) of the sugars may significantly affect the development of metabolic diseases, no experimental data are available on the impact of their formulations on gut microbiota, integrity and hepatic outcomes. In the present sudy, C57Bl/6j mice were fed a standard diet plus water (SD), a standard diet plus 60% fructose syrup (L-Fr) or a 60% fructose solid diet plus water (S-Fr) for 12 weeks. Gut microbiota was characterized through 16S rRNA phylogenetic profiling and shotgun sequencing of microbial genes in ileum content and related volatilome profiling...
February 13, 2018: Journal of Nutritional Biochemistry
Z Merhi, E Buyuk, M J Cipolla
STUDY QUESTION: Does vitamin D attenuate the adverse effects of advanced glycation end products (AGEs) on steroidogenesis by human granulosa cells (GCs)? SUMMARY ANSWER: AGEs alter the expression of genes important in steroidogenesis while 1,25-dihydroxyvitamin D3 (vit D3) in vitro attenuates some of the actions of AGEs on steroidogenic gene expression, possibly by downregulating the expression of the pro-inflammatory cell membrane receptor for AGEs (RAGE). WHAT IS KNOWN ALREADY: Vitamin D attenuates the pro-inflammatory effects of AGEs in non-ovarian tissues...
March 12, 2018: Molecular Human Reproduction
Panagiotis I Georgianos, Maria I Pikilidou, Vassilios Liakopoulos, Elias V Balaskas, Pantelis E Zebekakis
Arterial stiffness is an important risk factor for cardiovascular morbidity and mortality in patients with end-stage renal disease (ESRD). Arterial stiffness aggravates cardiovascular risk via multiple pathways, such as augmentation of aortic systolic pressure, subendocardial hypoperfusion, and excess pulsatile energy transmission from macro- to microcirculation. Pathogenesis of the arteriosclerotic process in ESRD is complex and not yet fully understood. Several factors unique to ESRD, such as mineral metabolism disturbances, vascular calcifications, formation of advanced glycation end-products, and acute and chronic volume overload, are proposed to play a particular role in the progression of arteriosclerosis in ESRD...
March 12, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Hye-Yeong Kim, Xiaolei Wang, Rui Kang, Daolin Tang, Brian A Boone, Herbert J Zeh, Michael T Lotze, W Barry Edwards
Noninvasive detection of both early pancreatic neoplasia and metastases could enhance strategies to improve patient survival in this disease that is notorious for an extremely poor prognosis. There are almost no identifiable targets for non-invasive diagnosis by positron emission tomography (PET) for patients with pancreatic ductal adenocarcinoma (PDAC). Over-expression of the receptor for advanced glycation end products (RAGE) is found on the cell surface of both pre-neoplastic lesions and invasive PDAC. Here, a RAGE-specific single chain (scFv) was developed, specific for PET imaging in syngeneic mouse models of PDAC...
2018: PloS One
Aramsri Meeprom, Catherine B Chan, Weerachat Sompong, Sirichai Adisakwattana
Methylglyoxal (MG) is a reactive precursor to advanced glycation end-products (AGEs), which exert deleterious effects on cells and tissues. MG also causes pancreatic β-cell dysfunction and apoptosis. Isoferulic acid (IFA), a naturally occurring cinnamic acid derivative, is considered to be an antiglycating agent. However, the effect of IFA on MG-induced pancreatic β-cell dysfunction remains unknown. The objective of this study was to determine the protective effect of IFA against MG-induced mitochrondrial dysfunction and apoptosis in INS-1 pancreatic β-cells...
March 8, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Ae-Rang Hwang, Ju-Ock Nam, Young Jin Kang
Connective tissue growth factor (CTGF) is a novel fibrotic mediator, which is considered to mediate fibrosis through extracellular matrix (ECM) synthesis in diabetic cardiovascular complications. Statins have significant immunomodulatory effects and reduce vascular injury. We therefore examined whether fluvastatin has anti-fibrotic effects in vascular smooth muscle cells (VSMCs) and elucidated its putative transduction signals. We show that advanced glycation end products (AGEs) stimulated CTGF mRNA and protein expression in a time-dependent manner...
March 2018: Korean Journal of Physiology & Pharmacology
John Rene Labib, Sally Kamal Ibrahem, Hala Mohamed Sleem, Mohamed M Ismail, Shaimaa A M Abd El Fatah, Marwa Rashad Salem, Amaal A Abdelaal, Hadeel Al-Hanafi
Early identification of acute lung injury (ALI) in pediatric patients at risk of mortality is important for improving outcome.Assessment of soluble form of receptor for advanced glycation end products (sRAGE) as a valid biomarker for diagnosis of ALI among critically ill, pediatric patients in addition to correlating levels of sRAGE and different outcomes of those patients.A Hospital-based case-control study was conducted in pediatric intensive care units (PICUs) at Cairo University Hospital, along a period of 6 months...
March 2018: Medicine (Baltimore)
Tugba Soydas, Elif Yaprak Sarac, Suzan Cinar, Sibel Dogan, Seyhun Solakoglu, Matem Tuncdemir, Gonul Kanigur Sultuybek
Metformin is the most widely used anti-diabetic drug in the world. It reduces advanced glycation end product (AGEs)-induced ROS generation in high glucose condition. Protein glycation contributes to skin aging as it deteriorates the existing collagen by crosslinking. The progressive increase of AGE during aging not only causes oxidative damage to cellular macromolecules but also modulates the activation of transcription factors nuclear factor kappa-B(NF-kB). However, it is still unclear whether metformin can change collagen production and NF-kB activity induced by high glucose conditions in 3T3 fibroblast...
March 6, 2018: Journal of Physiology and Biochemistry
F Zhou, Y Tan, X-H Chen, F-L Wu, D-J Yang, X-W Zhang, X-M Wu, Y-Q Deng
OBJECTIVE: To study the improving effect of atorvastatin on plaque stability in diabetes mellitus (DM) mice complicated with atherosclerosis. MATERIALS AND METHODS: Apolipoprotein E (ApoE)-/- mice were used to establish the DM mouse model. Half of the mice received atorvastatin after successful modeling. ApoE-/- and C57BL/6J mice were used as controls. Oil red O staining and Masson staining were performed to detect the lipid and collagen components in mice. Immunohistochemical assay was used to observe the expressions of smooth muscle cell (SMC) and Ly-6c...
February 2018: European Review for Medical and Pharmacological Sciences
Eustachio Nettis, Maria Distaso, Salvatore Saitta, Marco Casciaro, Mariateresa Cristani, Antonina Saija, Angelo Vacca, Sebastiano Gangemi, Paola L Minciullo
Introduction: Oxidative stress is a result of an imbalance between endogenous production of free reactive oxygen species and reduced effectiveness of antioxidant defence mechanisms. Advanced glycation end products (AGEs) and advanced oxidation protein products (AOPPs) are compounds formed by transformation of macromolecules, including proteins which can serve as markers of oxidative stress and inflammation in several diseases. Aim: To investigate the role of AGEs and AOPPs as new markers of oxidative stress and inflammation in patients with chronic spontaneous urticaria (CSU)...
October 2017: Postȩpy Dermatologii i Alergologii
Li Zhou, Di Yao, Songqing Zhao, Yuzhang Jiang, Weiping Lu
INTRODUCTION: A variety of molecular pathways, such as generation of advanced glycation end products, inflammation, and oxidative stress, are involved in the development of diabetic nephropathy (DN). Recently, a protective effect of omega-3 polyunsaturated fatty acids on the kidney has been reported. This study aimed to determine serum docosahexaenoic acid (DHA) level and its association with inflammation factors in patients with DN. MATERIALS AND METHODS: One hundred patients with type 2 diabetic mellitus were divided into 3 groups of non-DN, early DN, and clinical DN, based on 24-hour urinary albumin levels...
March 2018: Iranian Journal of Kidney Diseases
Hatice Kansu-Celik, Yasemin Tasci, Burcu Kisa Karakaya, Mehmet Cinar, Tuba Candar, Gamze Sinem Caglar
OBJECTIVE: To evaluate the value of maternal serum advanced glycation end products (AGEs) level at 11-13 weeks' gestation for the prediction of preterm labor and or preterm premature rupture of membranes (PPROM). MATERIALS AND METHODS: This prospective cross-sectional study is performed in a university-affiliated hospital between February and April 2016. The participants of this study are low risk pregnant women. Blood samples for maternal AGEs level were collected in the first trimester of pregnancy and all women completed their antenatal follow-up and delivered in our center...
March 5, 2018: Journal of Maternal-fetal & Neonatal Medicine
Felix C F Schmitt, Eduardo Salgado, Janina Friebe, Thomas Schmoch, Florian Uhle, Thomas Fleming, Johanna Zemva, Lars Kihm, Christian Nusshag, Christian Morath, Martin Zeier, Thomas Bruckner, Arianeb Mehrabi, Peter P Nawroth, Markus A Weigand, Stefan Hofer, Thorsten Brenner
BACKGROUND: A prolonged cold ischemia time (CIT) is suspected to be associated with an increased ischemia and reperfusion injury (IRI) resulting in an increased damage to the graft. METHODS: In total, 91 patients were evaluated for a delayed graft function within 7 days after kidney transplantation (48 deceased, 43 living donors). Blood and urine samples were collected before, immediately after the operation, and 1, 3, 5, 7 and 10 days later. Plasma and/or urine levels of total keratin 18 (total K18), caspase-cleaved keratin 18 (cc K18), the soluble receptor for advanced glycation end-products (sRAGE), tissue inhibitor of metalloproteinase-2 and insulin-like growth factor-binding protein-7 ([TIMP-2]×[IGFBP7]) were measured...
March 5, 2018: Transplant International: Official Journal of the European Society for Organ Transplantation
Cinzia Antognelli, Rodolfo Cecchetti, Francesca Riuzzi, Matthew J Peirce, Vincenzo N Talesa
Metastasis is the primary cause of death in prostate cancer (PCa) patients. Effective therapeutic intervention in metastatic PCa is undermined by our poor understanding of its molecular aetiology. Defining the mechanisms underlying PCa metastasis may lead to insights into how to decrease morbidity and mortality in this disease. Glyoxalase 1 (Glo1) is the detoxification enzyme of methylglyoxal (MG), a potent precursor of advanced glycation end products (AGEs). Hydroimidazolone (MG-H1) and argpyrimidine (AP) are AGEs originating from MG-mediated post-translational modification of proteins at arginine residues...
March 5, 2018: Journal of Cellular and Molecular Medicine
Xinya Xu, Yue Zheng, Yunfen Huang, Jian Chen, Zijian Gong, Yuying Li, Chun Lu, Wei Lai, Qingfang Xu
BACKGROUND: The deposition of advanced glycation end products (AGEs) is accelerated in photoaged skin, but the underlying mechanisms remain elusive. Intracellular degradation has been recently considered to play an important role in AGEs removal. Although lysosomal cathepsin D (CatD), B (CatB), L(CatL) and proteasomes are found to degrade internalized AGEs, it remains unknown which protease degrades internalized AGEs in human dermal fibroblasts (HDFs), and whether a decrease in intracellular degradation contributes to enhanced AGEs deposition in photoaged skin...
February 19, 2018: Journal of Dermatological Science
Frank Klont, Simon D Pouwels, Jos Hermans, Nico C van de Merbel, Péter Horvatovich, Nick H T Ten Hacken, Rainer Bischoff
The study of proteins is central to unraveling (patho)physiological processes and has contributed greatly to our understanding of biological systems. Corresponding studies often employ procedures to enrich proteins from their biological matrix using antibodies or other affinity binders coupled to beads with a large surface area and a correspondingly high binding capacity. Striving for maximal binding capacity may, however, not always be required or desirable, for example for proteins of low abundance. Here we describe a simplified immunoprecipitation in 96-well ELISA format (IPE) approach for fast and easy enrichment of proteins...
May 15, 2018: Talanta
Forough Mohammadzadeh, James N Tsoporis, Shehla Izhar, Jean-Francois Desjardins, Thomas G Parker
The calcium binding protein S100B has been implicated in diabetic neuronal and vascular complications but has not been examined in the development of diabetes. S100B knock out (S100B KO) and wild-type (WT) mice were injected with 40mg/kg body weight streptozotocin (STZ) for 5 days. Blood and pancreatic tissue samples were obtained to examine islet structure and function, the profile of glucose and insulin and expression of glucose transporter 2 (Glut2), S100B and its receptor, the receptor for advanced glycation end products (RAGE)...
February 27, 2018: Experimental Cell Research
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