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Advanced glycation end products

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https://www.readbyqxmd.com/read/28330789/schiff-bases-of-putrescine-with-methylglyoxal-protect-from-cellular-damage-caused-by-accumulation-of-methylglyoxal-and-reactive-oxygen-species-in-dictyostelium-discoideum
#1
Seong-Jun Park, Min-Kyu Kwak, Sa-Ouk Kang
Polyamines protect protein glycation in cells against the advanced glycation end product precursor methylglyoxal, which is inevitably produced during glycolysis, and the enzymes that detoxify this α-ketoaldehyde have been widely studied. Nonetheless, nonenzymatic methylglyoxal-scavenging molecules have not been sufficiently studied either in vitro or in vivo. Here, we hypothesized reciprocal regulation between polyamines and methylglyoxal modeled in Dictyostelium grown in a high-glucose medium. We based our hypothesis on the reaction between putrescine and methylglyoxal in putrescine-deficient (odc(-)) or putrescine-overexpressing (odc(oe)) cells...
March 18, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28329851/short-tslp-attenuates-toluene-diisocyanate-tdi-induced-airway-inflammation-and-inhibits-hmgb1-rage-and-long-tslp-expression
#2
Yanhong Wang, Yanqing Le, Wenqu Zhao, Yun Lin, Yue Wu, Changhui Yu, Jing Xiong, Fei Zou, Hangming Dong, Shaoxi Cai, Haijin Zhao
Short thymic stromal lymphopoietin (short TSLP), one of TSLP variants, exerts anti-inflammatory activities in endotoxin shock and colitis mouse models. Our latest work reported that short TSLP prevented house dust mite (HDM)-induced epithelial barrier disruption. Yet the role of short TSLP in toluene diisocyanate (TDI)-induced asthma is unknown. Male BALB/c mice were sensitized and challenged with TDI to generate a chemical-induced asthma model. Synthetic short TSLP peptides were given intranasally (i.n.) or intraperitoneally (i...
February 27, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28329789/mediterranean-diet-supplemented-with-coenzyme-q10-modulates-the-postprandial-metabolism-of-advanced-glycation-end-products-in-elderly-men-and-women
#3
Javier Lopez-Moreno, Gracia M Quintana-Navarro, Javier Delgado-Lista, Antonio Garcia-Rios, Juan F Alcala-Diaz, Francisco Gomez-Delgado, Antonio Camargo, Pablo Perez-Martinez, Francisco J Tinahones, Gary E Striker, Francisco Perez-Jimenez, Jose M Villalba, Jose Lopez-Miranda, Elena M Yubero-Serrano
Advanced glycation end products (AGEs) and oxidative stress are elevated with aging and dysmetabolic conditions. Because a Mediterranean (Med) diet reduces oxidative stress, serum AGEs levels, and gene expression related to AGEs metabolism in healthy elderly people, we studied whether supplementation with coenzyme Q10 (CoQ) was of further benefit. Twenty participants aged ≥ 65 (10 men and 10 women) were randomly assigned to each of three isocaloric diets for successive periods of 4 weeks in a crossover design: Med diet, Med + CoQ, and a Western high-saturated-fat diet (SFA diet)...
October 21, 2016: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28326319/inhibitory-activities-of-stauntonia-hexaphylla-leaf-constituents-on-rat-lens-aldose-reductase-and-formation-of-advanced-glycation-end-products-and-antioxidant
#4
Seung Hwan Hwang, Shin Hwa Kwon, Set Byeol Kim, Soon Sung Lim
Stauntonia hexaphylla (Thunb.) Decne. (Lardizabalaceae) leaves (SHL) have been used traditionally as analgesics, sedatives, diuretics, and so on, in China. To date, no data have been reported on the inhibitory effect of SHL and its constituents on rat lens aldose reductase (RLAR) and advanced glycation end products (AGEs). Therefore, the inhibitory effect of compounds isolated from SHL extract on RLAR and AGEs was investigated to evaluate potential treatments of diabetic complications. The ethyl acetate (EtOAC) fraction of SHL extract showed strong inhibitory activity on RLAR and AGEs; therefore, EtOAc fraction (3...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28325697/alcam-a-novel-biomarker-in-patients-with-type-2-diabetes-mellitus-complicated-with-diabetic-nephropathy
#5
Alba Sulaj, Stefan Kopf, Elisabeth Gröne, Hermann-Josef Gröne, Sigrid Hoffmann, Erwin Schleicher, Hans-Ulrich Häring, Vedat Schwenger, Stephan Herzig, Thomas Fleming, Peter P Nawroth, Rüdiger von Bauer
BACKGROUND & AIM: Activated leukocyte cell adhesion molecule (ALCAM/CD166) functions analogue to the receptor of advanced glycation end products, which has been implicated in the development of diabetic nephropathy (DN). We investigated the expression of ALCAM and its ligand S100B in patients with DN. METHODS: A total of 34 non-diabetic patients, 29 patients with type 2 diabetes and normal albuminuria and 107 patients with type 2 diabetes complicated with DN were assessed for serum concentration of soluble ALCAM (sALCAM) by ELISA...
January 21, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28322944/new-insights-into-non-enzymatic-glycation-of-human-serum-albumin-biopolymer-a-study-to-unveil-its-impaired-structure-and-function
#6
Alok Raghav, Jamal Ahmad, Khursheed Alam, Asad U Khan
Albumin glycation and subsequent formation of advanced glycation end products (AGEs) correlate with diabetes and associated complications. Human Serum Albumin (HSA) was modified with D-glucose for a 40day period under sterile conditions at 37°C. Modified samples along with native HSA (unmodified) were analyzed for impairment in biochemical characteristics (fructosamine, carbonyl, thiol, lysine, arginine, hydroxymethyl furfural [HMF] content, electrochemical (electrical conductance), simulated gastric fluid assay, simulated intestinal fluid assay, spectroscopic properties (UV, fluorescence), optical (surface contact angle) and fluid dynamics (viscosity and Stokes radius)...
March 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28320103/paeoniflorin-ameliorates-ages-induced-mesangial-cell-injury-through-inhibiting-rage-mtor-autophagy-pathway
#7
Juan Chen, Di Zhao, Maomao Zhu, Minghua Zhang, Xuefeng Hou, Wenbo Ding, Shuai Sun, Weiquan Bu, Liang Feng, Shiping Ma, Xiaobin Jia
Glomerular mesangial cell plays a vital role in diabetic nephropathy (DN). Recent research has demonstrated that autophagy involved in the development of DN. Paeoniflorin (PF), a monoterpene glucoside, has been proved to attenuate advanced glycation end products (AGEs)-induced mesangial cell injury. However, the regulatory mechanism of PF on autophagy in mesangial cell remains unclear. The aim of this study was to explore the effect of PF on autophagy in AGEs-induced mesangial cell dysfunction. In this study, the leakage of the lactic dehydrogenase (LDH) into the extracellular medium was measured by LDH kit...
March 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28320035/srage-is-elevated-in-the-lungs-of-premature-infants-receiving-mechanical-ventilation
#8
Henry J Rozycki, Jennifer Bradley, Simon Karam
Background Soluble receptor for advanced glycation end-products (sRAGE), a soluble isoform of the RAGE receptor, is elevated in lungs from patients with acute conditions such as acute respiratory distress syndrome and bronchiolitis. This study investigated whether sRAGE is present in ventilated infants. Methods Tracheal aspirates from the first week or the fifth week of life were obtained from intubated very low birth weight subjects and analyzed by Western blot. Immunohistochemistry analysis for sRAGE was performed on paraffin-embedded lung autopsy slides from 19 other infants...
March 20, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28317461/hydroxy-methoxy-benzaldehyde-from-sesbania-grandilfora-inhibits-the-advanced-glycation-end-products-ages-mediated-fibrillation-in-hemoglobin
#9
G Prasanna, N Hari, N T Saraswathi
The present study was aimed to identify the active anti-glycation constituent from the leaves of Sesbania grandiflora. Characterization of the active constituent resulted in the identification of hydroxy methoxy benzaldehyde (HMB). The potential of HMB as anti-glycation lead was analyzed by fluorescence spectroscopy, fluorescence microscopy, scanning electron microscopy (SEM) and molecular interaction studies. Our results suggested that HMB inhibited formation of early (HbA1c) and advanced glycation end products (AGEs)...
March 20, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28314627/n-%C3%AE%C2%B5-carboxymethyl-lysine-concentration-in-debris-from-carotid-artery-stenting-correlates-independently-with-signal-intensity-on-t1-weighted-black-blood-magnetic-resonance-images
#10
Ayumu Eto, Noriyuki Sakata, Ryoji Nagai, Jun-Ichi Shirakawa, Ritsurou Inoue, Fumiaki Kiyomi, Kouhei Nii, Hiroshi Aikawa, Minoru Iko, Masanori Tsutsumi, Kimiya Sakamoto, Fumihiro Hiraoka, Takahumi Mitsutake, Hayatsura Hanada, Kiyoshi Kazekawa
BACKGROUND AND PURPOSE: Because magnetic resonance imaging (MRI) focuses on the morphological characteristics of carotid artery plaques, its diagnostic value with respect to plaque vulnerability is limited. We examined the correlation between N(ε)-(carboxymethyl)lysine (CML), a main chemical structure of advanced glycation end-products, and the vulnerability of plaques visualized on MRI scans. MATERIALS AND METHODS: We enrolled 43 patients who had undergone carotid artery stenting (CAS) for carotid artery stenosis; all underwent MRI studies, including black-blood MRI and diffusion-weighted imaging (DWI)...
March 14, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28304347/plausible-roles-for-rage-in-conditions-exacerbated-by-direct-and-indirect-secondhand-smoke-exposure
#11
REVIEW
Joshua B Lewis, Kelsey M Hirschi, Juan A Arroyo, Benjamin T Bikman, David L Kooyman, Paul R Reynolds
Approximately 1 billion people smoke worldwide, and the burden placed on society by primary and secondhand smokers is expected to increase. Smoking is the leading risk factor for myriad health complications stemming from diverse pathogenic programs. First- and second-hand cigarette smoke contains thousands of constituents, including several carcinogens and cytotoxic chemicals that orchestrate chronic inflammatory responses and destructive remodeling events. In the current review, we outline details related to compromised pulmonary and systemic conditions related to smoke exposure...
March 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28304302/sleep-deprivation-induced-plasma-amyloid-%C3%AE-transport-disturbance-in-healthy-young-adults
#12
Meng Wei, Beiyu Zhao, Kang Huo, Yongning Deng, Suhang Shang, Jie Liu, Yanbo Li, Louyan Ma, Yu Jiang, Liangjun Dang, Chen Chen, Shan Wei, Juanli Zhang, Hailei Yang, Fan Gao, Qiumin Qu
BACKGROUND: Sleep is an important physiological process and beneficial in the removal of brain metabolites and functional recovery. Prior studies have shown that sleep disorders are significant risk factors for Alzheimer's disease (AD). OBJECTIVE: The present study was designed to characterize the effect of short-term total sleep deprivation (TSD) on plasma amyloid-β (Aβ) concentrations. METHODS: A clinical trial was conducted between March 1, 2016, and April 1, 2016...
March 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28299531/formation-of-pentosidine-cross-linking-in-myoglobin-by-glyoxal-detection-of-fluorescent-advanced-glycation-end-product
#13
Sauradipta Banerjee
Glyoxal, a reactive α-oxoaldehyde, increases in diabetic condition and reacts with proteins to form advanced glycation end products (AGEs) following Maillard-like reaction. Considering the significance of protein modification by glyoxal-derived AGEs, we investigated the in vitro effect of glyoxal (200 μM) on the monomeric heme protein myoglobin (Mb) (100 μM) after incubation for one week at 25 °C. Glyoxal-treated Mb exhibited increased absorbance around the Soret region, decreased α-helicity and thermal stability compared to control Mb...
March 15, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28299499/evaluation-of-vitreous-levels-of-advanced-glycation-end-products-and-angiogenic-factors-as-biomarkers-for-severity-of-diabetic-retinopathy
#14
Makiko Katagiri, Jun Shoji, Noriko Inada, Satoshi Kato, Shigehiko Kitano, Yasuko Uchigata
BACKGROUND/AIMS: Glyceraldehyde-derived advanced glycation end products (glycer-AGE; also called Toxic-AGE [TAGE]) play a crucial role in the pathogenesis of diabetic angiopathy. However, the relationships between vitreous glycer-AGE levels and diabetic retinopathy (DR) severity, and between glycer-AGE levels and the levels of other angiogenic factors remain unknown. We investigated the correlation between levels of vitreous biomarkers, including glycer-AGE and angiogenic factors (vascular endothelial growth factor [VEGF], interleukin [IL]-8, leptin, placental growth factor [PlGF], endoglin, and fibroblast growth factor [FGF]-2) in patients with DR, using three DR staging groups...
March 15, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28295872/cellular-crosstalk-inflammatory-signals-and-enhanced-microvascular-permeability
#15
Jerome W Breslin
Microvascular leakage remains a significant clinical problem for which there is no specific therapeutic available. This Special Topics issue of the journal Microcirculation features reviews pertaining to the cellular and molecular mechanisms that control the integrity of the microvascular barrier. Meegan et al [1] summarize recent research findings about how neutrophil extracellular traps and how these can cause injury to the microvascular barrier. Zhang et al [2] highlight the microvascular response to advanced glycation end products that are formed as part of the pathophysiology of diabetes mellitus...
March 14, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28294852/-level-of-soluble-receptor-for-glycation-end-products-in-patients-with-restenosis-after-coronary-artery-stenting
#16
S G Kozlov, Z A Gabbasov, S V Byazrova, O S Saburova, V P Masenko
The purpose of research - the study of the level of soluble receptor for advanced glycation end products (CNG) in patients with coronary heart disease (CHD) with angina pectoris who have emerged restenosis after implantation of drug-eluting stents. MATERIAL AND METHODS: HASH(0x3805d18)
April 2016: Kardiologiia
https://www.readbyqxmd.com/read/28290298/evaluation-of-an-olive-leaf-extract-as-a-natural-source-of-antiglycative-compounds
#17
Marta Navarro, Francisco J Morales
Advanced Glycation End-products (AGEs) have been associated to diabetes, neurodegenerative and cardiovascular diseases. Mitigating the formation of AGEs is a strategy to avoid detrimental physiopathological effects of age-related chronic diseases. An olive leaf extract (OLE), obtained under acidic conditions, and two fractions, obtained by solid-phase extraction, were characterized by LC-MS/MS. Antiglycative capacity of OLE and fractions were investigated in different in vitro models. The OLE significantly inhibited the formation of Amadori products at the early stage as well as the formation of fluorescent AGEs at the advanced stage of the glycation...
February 2017: Food Research International
https://www.readbyqxmd.com/read/28289043/exocytosis-mediated-urinary-full-length-megalin-excretion-is-linked-with-the-pathogenesis-of-diabetic-nephropathy
#18
Shankhajit De, Shoji Kuwahara, Michihiro Hosojima, Tomomi Ishikawa, Ryohei Kaseda, Piyali Sarkar, Yusuke Yoshioka, Hideyuki Kabasawa, Tomomichi Iida, Sawako Goto, Koji Toba, Yuki Higuchi, Yoshiki Suzuki, Masanori Hara, Hiroyuki Kurosawa, Ichiei Narita, Yoshiaki Hirayama, Takahiro Ochiya, Akihiko Saito
Efficient biomarkers for diabetic nephropathy (DN) have not been established. Using enzyme-linked immunosorbent assay, we found previously that urinary levels of full-length megalin (C-megalin), a multiligand endocytic receptor in proximal tubules, was positively correlated with DN progression in type 2 diabetes mellitus (T2DM). Here, we found that urinary extracellular vesicle (UEV) excretion and C-megalin content in UEVs or in their exosomal fraction increased along with the progression of the albuminuric stages in T2DM patients...
March 13, 2017: Diabetes
https://www.readbyqxmd.com/read/28288284/sweet-potato-ipomoea-batatas-attenuates-diet-induced-aortic-stiffening-independent-of-changes-in-body-composition
#19
Tyler Garner, An Ouyang, Adam J Berrones, Marilyn S Campbell, Bing Du, Bradley S Fleenor
We hypothesized a sweet potato intervention would prevent high fat diet-induced aortic stiffness, which would be associated with decreased arterial oxidative stress and increased mitochondrial uncoupling. Young (8-week old) C57BL/6J mice were randomly divided into 4 groups: low fat (LF, 10% fat), high fat (HF, 60% fat), low fat sweet potato (LFSP, 10% fat containing 260.3 ug/kcal SP), or high fat sweet potato diet (HFSP, 60% fat containing 260.3 ug/kcal SP) for 16 weeks. Compared to LF and LFSP, HF and HFSP fed mice had increased body mass and percent fat mass with lower percent lean mass (all, P<0...
March 13, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28287485/chemical-constituents-of-smilax-china-l-stems-and-their-inhibitory-activities-against-glycation-aldose-reductase-%C3%AE-glucosidase-and-lipase
#20
Hee Eun Lee, Jin Ah Kim, Wan Kyunn Whang
The search for natural inhibitors with anti-diabetes properties has gained increasing attention. Among four selected Smilacaceae family plants, Smilax china L. stems (SCS) showed significant in vitro anti-glycation and rat lens aldose reductase inhibitory activities. Bioactivity-guided isolation was performed with SCS and four solvent fractions were obtained, which in turn yielded 10 compounds, including one phenolic acid, three chlorogenic acids, four flavonoids, one stilbene, and one phenylpropanoid glycoside; their structures were elucidated using nuclear magnetic resonance and mass spectrometry...
March 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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