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Insulin resistance & oxidation stress

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https://www.readbyqxmd.com/read/28212306/metabolic-effects-of-berries-with-structurally-diverse-anthocyanins
#1
John Overall, Sierra A Bonney, Mickey Wilson, Arnold Beermann, Mary H Grace, Debora Esposito, Mary Ann Lila, Slavko Komarnytsky
Overconsumption of energy dense foods and sedentary lifestyle are considered as major causes of obesity-associated insulin resistance and abnormal glucose metabolism. Results from both cohort studies and randomized trials suggested that anthocyanins from berries may lower metabolic risks, however these reports are equivocal. The present study was designed to examine effects of six berries with structurally diverse anthocyanin profiles (normalized to 400 µg/g total anthocyanin content) on development of metabolic risk factors in the C57BL/6 mouse model of polygenic obesity...
February 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28210913/dietary-and-commercialized-fructose-sweet-or-sour
#2
REVIEW
Aslihan Yerlikaya, Tuncay Dagel, Christopher King, Masanari Kubawara, Miguel A Lanaspa, Ana Andres-Hernando, Adrian Covic, Jacek Manitius, Alan A Sag, Mehmet Kanbay
Metabolic syndrome and diabetes are main health problems of modern life in the twenty-first century. Alarming ratios of global prevalence lead to conduct more and more researches about etiological factors and pathogenesis. Disease mechanism is elementary for advancing more efficient and practicable treatment methods. Concurrent increase in both fructose consumption with Western diet and metabolic syndrome has revealed fructose hypothesis that suggests fructose as one of etiological factor of metabolic syndrome (insulin resistance, central obesity, hypertension, etc...
February 16, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28194257/is-p53-involved-in-tissue-specific-insulin-resistance-formation
#3
REVIEW
Justyna Strycharz, Jozef Drzewoski, Janusz Szemraj, Agnieszka Sliwinska
p53 constitutes an extremely versatile molecule, primarily involved in sensing the variety of cellular stresses. Functional p53 utilizes a plethora of mechanisms to protect cell from deleterious repercussions of genotoxic insults, where senescence deserves special attention. While the impressive amount of p53 roles has been perceived solely by the prism of antioncogenic effect, its presence seems to be vastly connected with metabolic abnormalities underlain by cellular aging, obesity, and inflammation. p53 has been found to regulate multiple biochemical processes such as glycolysis, oxidative phosphorylation, lipolysis, lipogenesis, β-oxidation, gluconeogenesis, and glycogen synthesis...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28187269/excessive-consumption-of-fructose-causes-cardiometabolic-dysfunctions-through-oxidative-stress-and-inflammation
#4
Nathalia Bernardes, Prathapan Ayyappan, Katia De Angelis, Ashim Bagchi, Gauri Akolkar, Danielle da Silva Dias, Adriane Bello-Klein, Pawan K Singal
A rapid rise in obesity as well as physical inactivity in industrialized countries is associated with fructose consumption-mediated metabolic syndrome having a strong association with cardiovascular disease. Although insulin resistance is thought to be at the core, visceral obesity, hypertension and hypertriglyceridemia are also considered important components of this metabolic disorder. In addition, various other abnormalities such as inflammation, oxidative stress and elevated levels of uric acid are also part of this syndrome...
February 10, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28186655/chronic-transgenerational-vitamin-b12-deficiency-of-severe-and-moderate-magnitudes-modulates-adiposity-probable-underlying-mechanisms
#5
Shampa Ghosh, Jitendra Kumar Sinha, Bojanapalli Muralikrishna, Uday Kumar Putcha, Manchala Raghunath
We have demonstrated previously that severe but not moderate vitamin B12 deficiency altered body composition and induced adiposity in female C57BL/6 mice. This study aims to elucidate the effects of chronic transgenerational dietary vitamin B12 restriction on body composition and various biochemical parameters in the F1 generation offspring of our mouse models of severe and moderate vitamin B12 deficiency established earlier. Female weanling C57BL/6 mice received, ad libitum, for 4 weeks a (i) control diet, (ii) vitamin B12-restricted diet with pectin as dietary fiber (severely deficient diet), or (iii) vitamin B12-restricted diet with cellulose as dietary fiber (moderately deficient diet) and then mated with control males...
February 10, 2017: BioFactors
https://www.readbyqxmd.com/read/28184199/oxidative-modification-in-the-salivary-glands-of-high-fat-diet-induced-insulin-resistant-rats
#6
Urszula Kołodziej, Mateusz Maciejczyk, Agnieszka Miąsko, Jan Matczuk, Małgorzata Knaś, Piotr Żukowski, Małgorzata Żendzian-Piotrowska, Jan Borys, Anna Zalewska
Still little is known about the role of oxidative stress (OS) in the pathogenesis of the salivary gland dysfunction in the course of insulin resistance (IR). To induce IR rats was fed with a high fat diet (HFD) during 8 weeks. Stimulated and non-stimulated salivary flow rate, total protein, as well as oxidative damage markers: 4-HNE protein adduct, 8-isoprostanes (8-isoP), 8-hydroxy-D-guanosine (8-OHdG), advanced oxidation protein product (AOPP), and protein carbonyls (PC) were determined in the plasma and submandibular and parotid glands of IR and control rats...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28180948/tributyltin-exposure-at-noncytotoxic-doses-dysregulates-pancreatic-%C3%AE-cell-function-in-vitro-and-in-vivo
#7
Ya-Wen Chen, Kuo-Cheng Lan, Jing-Ren Tsai, Te-I Weng, Ching-Yao Yang, Shing-Hwa Liu
Tributyltin (TBT) is an endocrine disruptor. TBT can be found in food and in human tissues and blood. Several animal studies revealed that organotins induced diabetes with decreased insulin secretion. The detailed effect and mechanism of TBT on pancreatic β-cell function still remain unclear. We investigated the effect and mechanism of TBT exposure at noncytotoxic doses relevant to human exposure on β-cell function in vitro and in vivo. The β-cell-derived RIN-m5F cells and pancreatic islets from mouse and human were treated with TBT (0...
February 8, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28179267/obesity-and-pregnancy-mechanisms-of-short-term-and-long-term-adverse-consequences-for-mother-and-child
#8
REVIEW
Patrick M Catalano, Kartik Shankar
Obesity is the most common medical condition in women of reproductive age. Obesity during pregnancy has short term and long term adverse consequences for both mother and child. Obesity causes problems with infertility, and in early gestation it causes spontaneous pregnancy loss and congenital anomalies. Metabolically, obese women have increased insulin resistance in early pregnancy, which becomes manifest clinically in late gestation as glucose intolerance and fetal overgrowth. At term, the risk of cesarean delivery and wound complications is increased...
February 8, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28178625/vaccinium-virgatum-fruit-extract-as-an-important-adjuvant-in-biochemical-and-behavioral-alterations-observed-in-animal-model-of-metabolic-syndrome
#9
Pathise Souto Oliveira, Marta Gazal, Natália Porto Flores, Aline Rigon Zimmer, Vitor Clasen Chaves, Flávio Henrique Reginatto, Manuella Pinto Kaster, Rejane Giacomelli Tavares, Roselia Maria Spanevello, Claiton Leoneti Lencina, Francieli Moro Stefanello
The aim of this study was to investigate the effect of blueberry (Vaccinium virgatum) fruit extract on metabolic, behavioral and oxidative stress parameters in the hippocampus and cerebral cortex of mice submitted to an experimental model of metabolic syndrome induced by a highly palatable diet (HPD). Mice C57BL/6 were divided into 4 experimental groups: (1) received standard chow and saline orally, (2) received standard chow and blueberry hydroalcoholic extract, (3) received HPD and saline orally, (4) received HPD and blueberry hydroalcoholic extract...
February 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28178612/dietary-soy-protein-improves-adipose-tissue-dysfunction-by-modulating-parameters-related-with-oxidative-stress-in-dyslipidemic-insulin-resistant-rats
#10
Paola G Illesca, Silvina M Álvarez, Dante A Selenscig, María Del R Ferreira, María S Giménez, Yolanda B Lombardo, María E D'Alessandro
The present study investigates the benefits of the dietary intake of soy protein on adipose tissue dysfunction in a rat model that mimics several aspects of the human metabolic syndrome. Wistar rats were fed a sucrose-rich diet (SRD) for 4 months. After that, half of the animals continued with SRD until month 8 while in the other half, casein protein was replaced by isolated soy protein for 4 months (SRD-S). A reference group consumed a control diet all the time. In adipose tissue we determined: i) the activities of antioxidant enzymes, gene expression of Mn-superoxide dismutase (SOD) and glutathione peroxidase (GPx), and glutathione redox state ii) the activity of xanthine oxidase (XO), ROS levels and the gene expression of NAD(P)H oxidase iii) the expression of the nuclear factor erythroid-2 related factor-2 (Nrf2)...
February 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28177730/impaired-mitochondria-and-intracellular-calcium-transients-in-the-salivary-glands-of-obese-rats
#11
Jitjiroj Ittichaicharoen, Nattayaporn Apaijai, Pongpan Tanajak, Piangkwan Sa-Nguanmoo, Nipon Chattipakorn, Siriporn C Chattipakorn
PURPOSE: Long-term consumption of a high-fat diet (HFD) causes not only obese-insulin resistance, but is also associated with mitochondrial dysfunction in several organs. However, the effect of obese-insulin resistance on salivary glands has not been investigated. We hypothesized that obese-insulin resistance induced by HFD impaired salivary gland function by reducing salivation, increasing inflammation and fibrosis, as well as impairing mitochondrial function and calcium transient signaling...
December 21, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28168013/exercise-training-attenuates-the-dysregulated-expression-of-adipokines-and-oxidative-stress-in-white-adipose-tissue
#12
REVIEW
Takuya Sakurai, Junetsu Ogasawara, Ken Shirato, Tetsuya Izawa, Shuji Oh-Ishi, Yoshinaga Ishibashi, Zsolt Radák, Hideki Ohno, Takako Kizaki
Obesity-induced inflammatory changes in white adipose tissue (WAT), which caused dysregulated expression of inflammation-related adipokines involving tumor necrosis factor-α and monocyte chemoattractant protein-1, contribute to the development of insulin resistance. Moreover, current literature reports state that WAT generates reactive oxygen species (ROS), and the enhanced production of ROS in obese WAT has been closely associated with the dysregulated expression of adipokines in WAT. Therefore, the reduction in excess WAT and oxidative stress that results from obesity is thought to be one of the important strategies in preventing and improving lifestyle-related diseases...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28165467/apx-115-a-first-in-class-pan-nadph-oxidase-nox-inhibitor-protects-db-db-mice-from-renal-injury
#13
Jin Joo Cha, Hye Sook Min, Ki Tae Kim, Jung Eun Kim, Jung Yeon Ghee, Hyun Wook Kim, Ji Eun Lee, Jee Young Han, Gayoung Lee, Hun Joo Ha, Yun Soo Bae, Sae Rom Lee, Sung Hwan Moon, Sung Chan Lee, Ganghyun Kim, Young Sun Kang, Dae Ryong Cha
Recent studies have suggested that renal Nox is important in the progression of diabetic nephropathy. Therefore, we investigated the effect of a novel pan-NOX-inhibitor, APX-115, on diabetic nephropathy in type 2 diabetic mice. Eight- week-old db/m and db/db mice were treated with APX-115 for 12 weeks. APX-115 was administered by oral gavage at a dose of 60 mg/kg per day. To compare the effects of APX-115 with a dual Nox1/Nox4 inhibitor, db/db mice were treated with GKT137831 according to the same protocol...
February 6, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28163315/effects-of-topical-capsaicin-combined-with-moderate-exercise-on-insulin-resistance-body-weight-and-oxidative-stress-in-hypoestrogenic-obese-rats
#14
J M L Medina-Contreras, J Colado-Velázquez, N L Gómez-Viquez, P Mailloux-Salinas, I Perez-Torres, A Aranda-Fraustro, K Carvajal, G Bravo
BACKGROUND: Hypoestrogenic women are one of the most vulnerable groups for the development of obesity and its complications. Capsaicin and exercise have demonstrated to reduce body weight and to improve insulin sensitivity in different animal models, but it is unknown whether their combination could be useful in hypoestrogenic obese females. METHODS: We investigated whether topical capsaicin, exercise or their combination had better therapeutic effects in an obesity-hypoestrogenism model...
February 6, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28161417/celastrol-attenuates-mitochondrial-dysfunction-and-inflammation-in-palmitate-mediated-insulin-resistance-in-c3a-hepatocytes
#15
Mohamad Hafizi Abu Bakar, Mohamad Roji Sarmidi, Joo Shun Tan, Mohamad Norisham Mohamad Rosdi
Accumulating evidence indicates that mitochondrial dysfunction-induced inflammation is among the convergence points for the greatest hallmarks of hepatic insulin resistance. Celastrol, an anti-inflammatory compound from the root of Tripterygium Wilfordii has been reported to mitigate insulin resistance and inflammation in animal disease models. Nevertheless, the specific mechanistic actions of celastrol in modulating such improvements at the cellular level remain obscure. The present study sought to explore the mechanistic roles of celastrol upon insulin resistance induced by palmitate in C3A human hepatocytes...
February 1, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28159867/fenofibrate-but-not-ezetimibe-prevents-fatty-liver-disease-in-mice-lacking-phosphatidylethanolamine-n-methyltransferase
#16
Jelske N van der Veen, Susanne Lingrell, Xia Gao, Abhijit Takawale, Zamaneh Kassiri, Dennis E Vance, René L Jacobs
BACKGROUND AND AIMS: Mice lacking phosphatidylethanolamine N-methyltransferase (PEMT) are protected from high-fat diet (HFD)-induced obesity and insulin resistance. However, these mice develop severe non-alcoholic fatty liver disease (NAFLD) when fed the HFD, which is mainly due to inadequate secretion of VLDL particles. Our aim was to prevent NAFLD development in mice lacking PEMT. METHODS: We treated Pemt-/- mice with either ezetimibe or fenofibrate to see if either could ameliorate liver disease in these mice...
February 3, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28157387/trigonelline-attenuates-hepatic-complications-and-molecular-alterations-in-high-fat-high-fructose-diet-induced-insulin-resistance-in-rats
#17
Nehal A Afifi, Amer Ramadan, Emad Y Erian, Dalia O Saleh, Ahmed A Sedik, Manal Badawi, Walid El Hotaby
The present study aimed to evaluate the effect of trigonelline (TRG) on the hepatic complications associated with high-fat high-fructose (HFHF) diet-induced insulin resistance (IR) in rats. IR was induced by giving a saturated fat diet and 10% fructose in drinking water to rats for 8 weeks. Insulin-resistant rats were orally treated with TRG (50 and 100 mg/kg), sitagliptin (SIT; 5 mg/kg), or a combination of TRG (50 mg/kg) and SIT (5 mg/kg) for 14 days. Liver homogenates were used for assessment of hepatic lipids, oxidative stress biomarkers, and inflammatory cytokines...
October 12, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28154371/oxidative-stress-and-calcium-dysregulation-by-palmitate-in-type-2-diabetes
#18
REVIEW
Luong Dai Ly, Shanhua Xu, Seong-Kyung Choi, Chae-Myeong Ha, Themis Thoudam, Seung-Kuy Cha, Andreas Wiederkehr, Claes B Wollheim, In-Kyu Lee, Kyu-Sang Park
Free fatty acids (FFAs) are important substrates for mitochondrial oxidative metabolism and ATP synthesis but also cause serious stress to various tissues, contributing to the development of metabolic diseases. CD36 is a major mediator of cellular FFA uptake. Inside the cell, saturated FFAs are able to induce the production of cytosolic and mitochondrial reactive oxygen species (ROS), which can be prevented by co-exposure to unsaturated FFAs. There are close connections between oxidative stress and organellar Ca(2+) homeostasis...
February 3, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28153529/ambient-ozone-and-incident-diabetes-a-prospective-analysis-in-a-large-cohort-of-african-american-women
#19
Michael Jerrett, Robert Brook, Laura F White, Richard T Burnett, Jeffrey Yu, Jason Su, Edmund Seto, Julian Marshall, Julie R Palmer, Lynn Rosenberg, Patricia F Coogan
BACKGROUND: Ozone is a ubiquitous air pollutant with increasing concentrations in many populous regions. Toxicological studies show that ozone can cause oxidative stress and increase insulin resistance. These pathways may contribute to metabolic changes and diabetes formation. In this paper, we investigate the association between ozone and incident type 2 diabetes in a large cohort of African American women. METHODS: We used Cox proportional hazards models to calculate hazard ratios (HRs) for incident type 2 diabetes associated with exposure to ozone in a cohort of 45,231 African American women living in 56 metropolitan areas across the United States...
January 30, 2017: Environment International
https://www.readbyqxmd.com/read/28152396/insulin-resistance-atherogenicity-and-iron-metabolism-in-multiple-sclerosis-with-and-without-depression-associations-with-inflammatory-and-oxidative-stress-biomarkers-and-uric-acid
#20
Sayonara Rangel Oliveira, Ana Paula Kallaur, Josiane Lopes, Andrea Name Colado Simão, Edna Maria Vissoci Reiche, Elaine Regina Delicato de Almeida, Helena Kaminami Morimoto, Wildea Lice de Carvalho Jennings de Pereira, Daniela Frizon Alfieri, Tamires Flauzino, Caio de Meleck Proença, Anna Maria Gomes, Damacio Ramón Kaimen-Maciel, Michael Maes
Depression is accompanied by metabolic disorders in iron metabolism, lipoproteins, and insulin resistance. We measured plasma levels of ferritin, iron, lipids, insulin, and glucose and computed the homeostasis model assessment (HOMA2IR) and atherogenic index of plasma (AIP) in MS patients with and without depression and healthy controls. Explanatory variables were serum uric acid, interleukin (IL)-6, lipid hydroperoxides (CL-LOOH), albumin, and C-reactive protein (CRP). Depression was assessed using the Hospital Anxiety and Depression Scale (HADS), neurological disability using the Expanded Disability Status Scale (EDSS), and disease progression using ∆EDSS over five years earlier...
December 27, 2016: Psychiatry Research
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