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Inhibition of glycation

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https://www.readbyqxmd.com/read/28338748/role-of-scavenger-receptors-as-damage-associated-molecular-pattern-receptors-in-toll-like-receptor-activation
#1
Kyoko Komai, Takashi Shichita, Minako Ito, Mitsuhiro Kanamori, Shunsuke Chikuma, Akihiko Yoshimura
Damage-associated molecular patterns (DAMPs) have been implicated in sterile inflammation in various tissue injuries. High-mobility group box 1 (HMGB1) is a representative DAMP, and has been shown to transmit signals through receptors for advanced glycation end products (RAGEs) and TLRs, including TLR2 and TLR4. HMGB1 does not, however, bind to TLRs with high affinity; therefore, the mechanism of HMGB1-mediated TLR activation remains unclear. In this study, we found that fluorescently labeled HMGB1 was efficiently internalized into macrophages through class A scavenger receptors...
February 24, 2017: International Immunology
https://www.readbyqxmd.com/read/28337263/receptor-for-advanced-glycation-end-as-drug-targets-in-diabetes-induced-skin-lesion
#2
Xiang-Fang Chen, Wei Tang, Wei-Dong Lin, Zi-Yu Liu, Xiao-Xiao Lu, Bei Zhang, Fei Ye, Zhi-Min Liu, Jun-Jie Zou, Wan-Qing Liao
The involvement of the receptor for advanced glycation end (RAGE) in different diseases has been reviewed in great detail, previously, but the effects of diabetic drugs on RAGE-induced skin lesion during long course diabetes remains poorly understood. In the present study, we have shown that RAGE was overexpressed in both diabetic rats and human keratinocytes (HaCaT cells). Cell cycle arrest and apoptosis as well as alternations of relative protein levels were also found in diabetic rats and HaCaT cells with overexpression of RAGE that were rectified by metformin (Met) treatment...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28332871/sodium-glucose-cotransporter-2-and-dipeptidyl-peptidase-4-inhibition-promise-of-a-dynamic-duo
#3
Ildiko Lingvay
OBJECTIVE: This article reviews evidence supporting sodium glucose cotransporter 2 (SGLT2) inhibitor and dipeptidyl peptidase-4 (DPP-4) inhibitor combination therapy for management of type 2 diabetes mellitus (T2DM). METHODS: We conducted a non-systematic review of the literature focusing on single-pill or fixed-dose combinations of SGLT2 inhibitors and DPP-4 inhibitors available in the United States. RESULTS: SGLT2 inhibitors and DPP-4 inhibitors have complementary mechanisms of action that address several of the underlying pathophysiological abnormalities present in T2DM without overlapping toxicities...
March 23, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28329851/short-tslp-attenuates-toluene-diisocyanate-tdi-induced-airway-inflammation-and-inhibits-hmgb1-rage-and-long-tslp-expression
#4
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/28320103/paeoniflorin-ameliorates-ages-induced-mesangial-cell-injury-through-inhibiting-rage-mtor-autophagy-pathway
#5
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/28317461/hydroxy-methoxy-benzaldehyde-from-sesbania-grandilfora-inhibits-the-advanced-glycation-end-products-ages-mediated-fibrillation-in-hemoglobin
#6
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/28290298/evaluation-of-an-olive-leaf-extract-as-a-natural-source-of-antiglycative-compounds
#7
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/28287141/myricitrin-alleviates-oxidative-stress-induced-inflammation-and-apoptosis-and-protects-mice-against-diabetic-cardiomyopathy
#8
Bin Zhang, Qiang Shen, Yaping Chen, Ruile Pan, Shihuan Kuang, Guiyan Liu, Guibo Sun, Xiaobo Sun
Diabetic cardiomyopathy (DCM) has been increasingly considered as a main cause of heart failure and death in diabetic patients. At present, no effective treatment exists to prevent its development. In the present study, we describe the potential protective effects and mechanisms of myricitrin (Myr) on the cardiac function of streptozotosin-induced diabetic mice and on advanced glycation end products (AGEs)-induced H9c2 cardiomyocytes. In vitro experiments revealed that pretreatment with Myr significantly decreased AGEs-induced inflammatory cytokine expression, limited an increase in ROS levels, and reduced cell apoptosis, fibrosis, and hypertrophy in H9c2 cells...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28285361/hmgb1-attenuates-tgf-%C3%AE-induced-epithelial-mesenchymal-transition-of-fadu-hypopharyngeal-carcinoma-cells-through-regulation-of-rage-expression
#9
Yanmei Li, Ping Wang, Jia Zhao, Haonan Li, Dahai Liu, Wei Zhu
Abnormal expression of high-mobility group box-1 (HMGB1) protein occurs in many tumors and is closely associated with tumor invasion and metastasis. However, a role for HMGB1 in epithelial-mesenchymal transition (EMT) in hypopharyngeal carcinoma has not been previously reported. We cultured cells of the hypopharyngeal carcinoma cell line FaDu in vitro and then treated them with 5 ng/ml TGF-β1 for 48 h to induce EMT. Vimentin, Snail, and HMGB1 expression patterns were then detected using immunofluorescence staining; HMGB1 mRNA and protein expression were verified by RT-PCR and western blot analyses...
March 11, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28285015/tnf%C3%AE-contributes-to-diabetes-impaired-angiogenesis-in-fracture-healing
#10
Jason C Lim, Kang I Ko, Marcelo Mattos, Miao Fang, Citong Zhang, Daniel Feinberg, Hisham Sindi, Shuai Li, Jazia Alblowi, Rayyan A Kayal, Thomas A Einhorn, Louis Gerstenfeld, Dana Graves
Diabetes increases the likelihood of fracture, interferes with fracture healing and impairs angiogenesis. The latter may be significant due to the critical nature of angiogenesis in fracture healing. Although it is known that diabetes interferes with angiogenesis the mechanisms remain poorly defined. We examined fracture healing in normoglycemic and streptozotocin-induced diabetic mice and quantified the degree of angiogenesis with antibodies to three different vascular markers, CD34, CD31 and Factor VIII. The role of diabetes-enhanced inflammation was investigated by treatment of the TNFα-specific inhibitor, pegsunercept starting 10days after induction of fractures...
March 8, 2017: Bone
https://www.readbyqxmd.com/read/28284699/incorporated-glucosamine-adversely-affects-the-emulsifying-properties-of-whey-protein-isolate-polymerized-by-transglutaminase
#11
Lin Chen, Niamat Ullah, Chenyi Li, Robert M Hackman, Zhixi Li, Xinglian Xu, Guanghong Zhou, Xianchao Feng
Glucosamine (GlcN) and microbial transglutaminase (Tgase) are used separately or together to improve the emulsifying properties of whey protein isolate (WPI). However, little is known about how the emulsifying properties change when GlcN residues are incorporated into WPI cross-linked by Tgase. We used Tgase as a biocatalyst to cross-link WPI in the presence of GlcN in a liquid system for 12 h at a moderate temperature (25°C). Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analyses indicated that protein polymerization and GlcN conjugation occurred simultaneously, phenomena also supported by the loss of free amines (9...
March 8, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28284330/inhibition-of-ages-rage-rho-rock-pathway-suppresses-non-specific-neuroinflammation-by-regulating-bv2-microglial-m1-m2-polarization-through-the-nf-%C3%AE%C2%BAb-pathway
#12
Jingkao Chen, Zhaowei Sun, Minghua Jin, Yalin Tu, Shengnan Wang, Xiaohong Yang, Qiuhe Chen, Xiao Zhang, Yifan Han, Rongbiao Pi
The microglia-mediated neuroinflammation plays an important role in the pathogenesis of Alzheimer's disease (AD). Advanced glycation end products (AGEs)/receptor for advanced glycation end products (RAGE) or Rho/Rho kinase (ROCK) are both involved in the development of non-specific inflammation. However, there are few reports about their effects on neuroinflammation. Here, we explored the mechanism of AGEs/RAGE/Rho/ROCK pathway underlying the non-specific inflammation and microglial polarization in BV2 cells...
April 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28283753/cosmetic-applications-of-glucitol-core-containing-gallotannins-from-a-proprietary-phenolic-enriched-red-maple-acer-rubrum-leaves-extract-inhibition-of-melanogenesis-via-down-regulation-of-tyrosinase-and-melanogenic-gene-expression-in-b16f10-melanoma-cells
#13
Hang Ma, Jialin Xu, Nicholas A DaSilva, Ling Wang, Zhengxi Wei, Liangran Guo, Shelby L Johnson, Wei Lu, Jun Xu, Qiong Gu, Navindra P Seeram
The red maple (Acer rubrum) is a rich source of phenolic compounds which possess galloyl groups attached to different positions of a 1,5-anhydro-D-glucitol core. While these glucitol-core containing gallotannins (GCGs) have reported anti-oxidant and anti-glycative effects, they have not yet been evaluated for their cosmetic applications. Herein, the anti-tyrosinase and anti-melanogenic effects of a proprietary phenolic-enriched red maple leaves extract [Maplifa(™); contains ca. 45% ginnalin A (GA) along with other GCGs] were investigated using enzyme and cellular assays...
March 10, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28274869/effective-inhibition-of-protein-glycation-by-combinatorial-usage-of-limonene-and-aminoguanidine-through-differential-and-synergistic-mechanisms
#14
Madhav M Joglekar, Laxman N Bavkar, Srinivas Sistla, Akalpita U Arvindekar
Protein glycation is a major mechanism for establishing secondary complication in diabetes mellitus. Effective inhibition of this process can prevent progression of the disorder into secondary complications. Aminoguanidine (AMG) and limonene (LM) are known protein glycation inhibitors. The aim of the present study was to demonstrate their differential mechanisms of action and to study whether combinatorial therapy can act synergistically and lower dosage, and thereby lower toxicity in treatment of secondary complications in diabetes...
March 6, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28274609/tongxinluo-improves-the-cognition-by-reducing-%C3%AE-amyloid-accumulation-in-spontaneous-hypertensive-rats
#15
Yu-Lang Fei, Hong-Jun Lv, Yan-Bo Li, Jie Liu, Yi-Hua Qian, Wei-Na Yang, Kai-Ge Ma, Hong-Bao Li, Qiu-Min Qu
β-amyloid (Aβ) accumulation in the brain is the major pathophysiology of Alzheimer disease (AD). Hypertension is a risk factor for AD by promoting Aβ deposition. Traditional Chinese medicinal compound tongxinluo (TXL) can improve blood circulation and endothelium-dependent vasodilation. This study investigates the effects of TXL on cognition and Aβ accumulation using spontaneously hypertensive rats (SHRs). TXL was intragastrically administered to SHRs at low-dose, mid-dose and high-dose for 15, 30 or 60 days...
March 5, 2017: Brain Research
https://www.readbyqxmd.com/read/28271468/the-role-of-endoplasmic-reticulum-stress-in-diabetic-nephropathy
#16
REVIEW
Ying Fan, Kyung Lee, Niansong Wang, John Cijiang He
PURPOSE OF REVIEW: Diabetic nephropathy (DN) has become the leading cause of end-stage renal disease (ESRD) worldwide. Accumulating evidence suggests that endoplasmic reticulum (ER) stress plays a major role in the development and progression of DN. Recent findings suggested that many attributes of DN, such as hyperglycemia, proteinuria, and increased advanced glycation end products and free fatty acids, can all trigger unfolded protein response (UPR) in kidney cells. Herein, we review the current knowledge on the role of ER stress in the setting of kidney injury with a specific emphasis on DN...
March 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28259164/n-butanol-extracts-of-morinda-citrifolia-suppress-advanced-glycation-end-products-age-induced-inflammatory-reactions-in-endothelial-cells-through-its-anti-oxidative-properties
#17
Yuji Ishibashi, Takanori Matsui, Fumiyuki Isami, Yumi Abe, Tatsuya Sakaguchi, Yuichiro Higashimoto, Sho-Ichi Yamagishi
BACKGROUND: Advanced glycation end products (AGEs), senescent macroprotein derivatives formed during a normal aging process and acceleratedly under diabetic conditions, play a role in atherosclerotic cardiovascular disease. AGEs cause endothelial cell (EC) damage, an initial trigger for atherosclerosis through the interaction with a receptor for AGEs (RAGE). We have previously shown that n-butanol extracts of Morinda citrifolia (noni), a plant belonging to the family Rubiaceae, block the binding of AGEs to RAGE in vitro...
March 4, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28257177/glycation-of-lysozyme-by-glycolaldehyde-provides-new-mechanistic-insights-in-diabetes-related-protein-aggregation
#18
Laura Mariño, Carlos Andrés Maya-Aguirre, Kris Pauwels, Bartolomé Vilanova, Joaquin Ortega-Castro, Juan Frau, Josefa Donoso, Miquel Adrover
Glycation occurs in vivo as a result of the nonenzymatic reaction of carbohydrates (and/or their autoxidation products) with proteins, DNA, or lipids. Protein glycation causes loss-of-function and, consequently, the development of diabetic-related diseases. Glycation also boosts protein aggregation, which can be directly related with the higher prevalence of aggregating diseases in diabetic people. However, the molecular mechanism connecting glycation with aggregation still remains unclear. Previously we described mechanistically how glycation of hen egg-white lysozyme (HEWL) with ribose induced its aggregation...
March 14, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28255209/do-advanced-glycation-end-products-and-its-receptor-play-a-role-in-pathophysiology-of-hypertension
#19
REVIEW
Kailash Prasad, Manish Mishra
There is a close relationship between arterial stiffness and blood pressure. The studies suggest that the advanced glycation end products (AGEs) and its cell receptor (RAGE) are involved in the arterial stiffness in two ways: changes in arterial structure and vascular function. Plasma levels of AGEs and expression of RAGE are elevated, while the levels of soluble RAGE (sRAGE) and endogenous secretory RAGE (esRAGE) are lowered in patients with hypertension (HTN). There is a positive correlation between plasma levels of AGEs and arterial stiffness, and an inverse association between arterial stiffness/HTN, and serum levels of sRAGE and esRAGE...
March 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28254022/specific-bioactive-compounds-in-ginger-and-apple-alleviate-hyperglycemia-in-mice-with-high-fat-diet-induced-obesity-via-nrf2-mediated-pathway
#20
Chethan Sampath, Muhammed Raihan Rashid, Shengmin Sang, Mohamed Ahmedna
Prolonged hyperglycemia activates the formation of advanced glycation end-products (AGEs). Major dicarbonyl compounds such as methylglyoxal or glyoxal are found to be the main precursors of AGEs and N(ε)-(carboxymethyl)lysine (CML) found to be predominantly higher in the diabetic population. We hypothesized that phloretin from apple and [6]-gingerol from ginger inhibit formation of AGEs and suppress the receptor for advanced glycation end products (RAGE) via nuclear factor erythroid-2-related-factor-2 (Nrf2)-dependent pathway...
July 1, 2017: Food Chemistry
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