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https://www.readbyqxmd.com/read/28632902/impaired-hippocampal-glucose-metabolism-during-and-after-flurothyl-induced-seizures-in-mice-reduced-phosphorylation-coincides-with-reduced-activity-of-pyruvate-dehydrogenase
#1
Tanya S McDonald, Karin Borges
OBJECTIVE: To determine changes in glucose metabolism and the enzymes involved in the hippocampus ictally and postictally in the acute mouse flurothyl seizure model. METHODS: [U-(13) C]-Glucose was injected (i.p.) prior to, or following a 5 min flurothyl-induced seizure. Fifteen minutes later, mice were killed and the total metabolite levels and % (13) C enrichment were analyzed in the hippocampal formation using gas chromatography-mass spectrometry. Activities of key metabolic and antioxidant enzymes and the phosphorylation status of pyruvate dehydrogenase were measured, along with lipid peroxidation...
June 20, 2017: Epilepsia
https://www.readbyqxmd.com/read/28632748/trimetazidine-therapy-for-diabetic-mouse-hearts-subjected-to-ex-vivo-acute-heart-failure
#2
Emilene Breedt, Lydia Lacerda, M Faadiel Essop
Acute heart failure (AHF) is the most common primary diagnosis for hospitalized heart diseases in Africa. As increased fatty acid β-oxidation (FAO) during heart failure triggers detrimental effects on the myocardium, we hypothesized that trimetazidine (TMZ) (partial FAO inhibitor) offers cardioprotection under normal and obese-related diabetic conditions. Hearts were isolated from 12-14-week-old obese male and female diabetic (db/db) mice versus lean non-diabetic littermates (db/+) controls. The Langendorff retrograde isolated heart perfusion system was employed to establish an ex vivo AHF model: a) Stabilization phase-Krebs Henseleit buffer (10 mM glucose) at 100 mmHg (25 min); b) Critical Acute Heart Failure (CAHF) phase-(1...
2017: PloS One
https://www.readbyqxmd.com/read/28631934/breast-milk-from-smokers-contains-less-cholesterol-and-protein-and-smaller-size-of-apolipoprotein-a-i-resulting-in-lower-zebrafish-embryo-survivability
#3
Seong-Min Kim, Suk-Jeong Kim, Jae-Yong Kim, Jae-Ryong Kim, Kyung-Hyun Cho
BACKGROUND: To determine the quality of breast milk (BM), we compared the functions of BM from ex-smokers and nonsmokers. SUBJECTS AND METHODS: We analyzed the contents of lipids, glucose, and protein in BM from ex-smokers (10 cigarettes/day for 13 ± 3 years) as well as infant formula. RESULTS: Nonsmokers' BM showed 2.4- and 1.4-fold higher cholesterol and protein contents, respectively, than BM from smokers. Infant formula contained almost no cholesterol, but did show remarkably higher glucose and triglyceride levels than BM...
June 20, 2017: Breastfeeding Medicine: the Official Journal of the Academy of Breastfeeding Medicine
https://www.readbyqxmd.com/read/28627440/microrna-21-regulates-hepatic-glucose-metabolism-by-targeting-foxo1
#4
Ailing Luo, Haibo Yan, Jichao Liang, Chunyuan Du, Xuemei Zhao, Lijuan Sun, Yong Chen
Abnormal activation of hepatic gluconeogenesis is a major contributor to fasting hyperglycemia in type 2 diabetes; however, the potential role of microRNAs in gluconeogenesis remains unclear. Here, we showed that hepatic expression levels of microRNA-21 (miR-21) were decreased in db/db and high-fat diet (HFD)-induced diabetic mice. Adenovirus-mediated overexpression of miR-21 decreased the expression of phosphoenolpyruvate carboxykinase (PEPCK) and glucose-6-phosphatase (G6Pase) and inhibited glucose production in primary mouse hepatocytes...
June 13, 2017: Gene
https://www.readbyqxmd.com/read/28626906/behavioural-implications-of-traditional-treatment-and-closed-loop-automated-insulin-delivery-systems-in-type-1-diabetes-applying-a-cognitive-restraint-theory-framework
#5
REVIEW
A R Kahkoska, E J Mayer-Davis, K K Hood, D M Maahs, K S Burger
As the prevalence of obesity in Type 1 diabetes rises, the effects of emerging therapy options should be considered in the context of both weight and glycaemic control outcomes. Artificial pancreas device systems will 'close the loop' between blood glucose monitoring and automated insulin delivery and may transform day-to-day dietary management for people with Type 1 diabetes in multiple ways. In the present review, we draw directly from cognitive restraint theory to consider unintended impacts that closed-loop systems may have on ingestive behaviour and food intake...
June 19, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28626744/central-beneficial-effects-of-trimetazidine-on-psychomotor-performance-in-normal-healthy-volunteers
#6
Hayder M Al-Kuraishy, Ali I Al-Gareeb
BACKGROUND: Trimetazidine is a fatty oxidation inhibitor, leading to shifting of energy substrate from fatty acid oxidation toward glucose oxidation that leads to the reduction of oxygen requirement. The aims of the present study were to elucidate the effects of trimetazidine on psychomotor performance and vigilance on normal healthy volunteers. MATERIALS AND METHODS: A total of 234 subjects (age 22-25 years) were recruited in this study. The volunteers were randomizing into two groups with 117 volunteers in each group...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28625601/role-of-social-interaction-exercise-diet-and-age-on-developing-and-untreated-diabetes-in-cynomolgus-monkeys
#7
Feng Yue, Guodong Zhang, Jorge E Quintero, Don M Gash, Zhiming Zhang
Type 2 diabetes mellitus is the most common form of diabetes that occurs in both human and nonhuman primates. Although spontaneously diabetic nonhuman primates are used extensively in diabetic related research and are a proven valuable tool for the study of the natural history of diabetes, little is known about the key factors that can cause this metabolic disorder and the preventative measures that could be employed to minimize the consequences of diabetes. Using a model of developing and untreated diabetes, this study describes the effects of housing arrangement (socially group- versus individually single-housed), exercise, diet, age, and sex on fasting plasma glucose, key lipids associated with diabetes, and bodyweight in two large cohorts of nonhuman primates...
June 15, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28624442/loss-of-fructose-1-6-bisphosphatase-induces-glycolysis-and-promotes-apoptosis-resistance-of-cancer-stem-like-cells-an-important-role-in-hexavalent-chromium-induced-carcinogenesis
#8
Jin Dai, Yanli Ji, Wei Wang, Donghern Kim, Leonard Yenwong Fai, Lei Wang, Jia Luo, Zhuo Zhang
Hexavalent chromium (Cr(VI)) compounds are confirmed human carcinogens for lung cancer. Our previous studies has demonstrated that chronic exposure of human bronchial epithelial BEAS-2B cells to low dose of Cr(VI) causes malignant cell transformation. The acquisition of cancer stem cell-like properties is involved in the initiation of cancers. The present study has observed that a small population of cancer stem-like cells (BEAS-2B-Cr-CSC) exists in the Cr(VI)-transformed cells (BEAS-2B-Cr). Those BEAS-2B-Cr-CSC exhibit extremely reduced capability of generating reactive oxygen species (ROS) and apoptosis resistance...
June 14, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28624434/brain-glucose-metabolism-role-of-wnt-signaling-in-the-metabolic-impairment-in-alzheimer-s-disease
#9
REVIEW
Pedro Cisternas, Nibaldo C Inestrosa
The brain is an organ that has a high demand for glucose. In the brain, glucose is predominantly used in energy production, with almost 70% of the energy used by neurons. The importance of the energy requirement in neurons is clearly demonstrated by the fact that all neurodegenerative disorders exhibit a critical metabolic impairment that includes decreased glucose uptake/utilization and decreased mitochondrial activity, with a consequent diminution in ATP production. In fact, in Alzheimer's disease, the measurement of the general metabolic rate of the brain has been reported to be an accurate tool for diagnosis...
June 14, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28624378/glucose-triggered-enhanced-solubilisation-release-and-cytotoxicity-of-poorly-water-soluble-anti-cancer-drugs-fromt1307-micelles
#10
Pooja Patidar, Sadafara A Pillai, Urjita Sheth, Pratap Bahadur, Anita Bahadur
Tetronic(®) 1307 (here after written as T1307) is a hydrophilic ethylene oxide-propylene oxide (EO-PO) star block copolymer with long EO chains (Total MW- 18000 and 70% EO). Although biocompatible, its use as a nanocarrier is restricted owing to its high critical micelle concentration (CMC) and temperature (CMT). We examined if the addition of glucose, a common pharmaceutical ingredient promotes micellization. Scattering and thermal studies show formation of stable unimodal micelles and cloud point (CP) decreased linearly...
June 15, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28622688/integration-of-metabolomics-transcriptomics-and-microrna-expression-profiling-reveals-a-mir-143-hk2-glucose-network-underlying-zinc-deficiency-associated-esophageal-neoplasia
#11
Louise Y Fong, Ruiyan Jing, Karl J Smalley, Cristian Taccioli, Johannes Fahrmann, Dinesh K Barupal, Hansjuerg Alder, John L Farber, Oliver Fiehn, Carlo M Croce
Esophageal squamous cell carcinoma (ESCC) in humans is a deadly disease associated with dietary zinc (Zn)-deficiency. In the rat esophagus, Zn-deficiency induces cell proliferation, alters mRNA and microRNA gene expression, and promotes ESCC. We investigated whether Zn-deficiency alters cell metabolism by evaluating metabolomic profiles of esophageal epithelia from Zn-deficient and replenished rats vs sufficient rats, using untargeted gas chromatography time-of-flight mass spectrometry (n = 8/group). The Zn-deficient proliferative esophagus exhibits a distinct metabolic profile with glucose down 153-fold and lactic acid up 1...
June 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28622511/metabolic-adaptation-establishes-disease-tolerance-to-sepsis
#12
Sebastian Weis, Ana Rita Carlos, Maria Raquel Moita, Sumnima Singh, Birte Blankenhaus, Silvia Cardoso, Rasmus Larsen, Sofia Rebelo, Sascha Schäuble, Laura Del Barrio, Gilles Mithieux, Fabienne Rajas, Sandro Lindig, Michael Bauer, Miguel P Soares
Sepsis is an often lethal syndrome resulting from maladaptive immune and metabolic responses to infection, compromising host homeostasis. Disease tolerance is a defense strategy against infection that preserves host homeostasis without exerting a direct negative impact on pathogens. Here, we demonstrate that induction of the iron-sequestering ferritin H chain (FTH) in response to polymicrobial infections is critical to establish disease tolerance to sepsis. The protective effect of FTH is exerted via a mechanism that counters iron-driven oxidative inhibition of the liver glucose-6-phosphatase (G6Pase), and in doing so, sustains endogenous glucose production via liver gluconeogenesis...
June 15, 2017: Cell
https://www.readbyqxmd.com/read/28622415/is-bisphenol-a-an-environmental-obesogen
#13
REVIEW
Samuel Legeay, Sébastien Faure
Bisphenol a (BPA) is an endocrine disruptor with an estrogenic activity that is widely produced for the manufacture of polycarbonate plastic, epoxy resin and thermal paper. Its ubiquitous presence in the environment contributes to broad and continuous human exposure which has been associated with deleterious health effects. Despite numerous controversial discussions and a lack of consensus about BPA's safety, growing evidence indicates that BPA exposure positively correlates with an increased risk of developing obesity...
June 16, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28620167/high-throughput-rapid-prototyping-of-low-cost-paper-based-microfluidics
#14
Fariba Ghaderinezhad, Reza Amin, Mikail Temirel, Bekir Yenilmez, Adam Wentworth, Savas Tasoglu
Paper-based micro analytical devices offer significant advantages compared to the conventional microfluidic chips including cost-effectiveness, ease of fabrication, and ease of use while preserving critical features including strong capillary action and biological compatibility. In this work, we demonstrate an inexpensive, rapid method for high-throughput fabrication of paper-based microfluidics by patterning hydrophobic barriers using a desktop pen plotter integrated with a custom-made, low-cost paper feeder...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28615726/microfluidic-co-cultures-of-retinal-pigment-epithelial-cells-and-vascular-endothelial-cells-to-investigate-choroidal-angiogenesis
#15
Li-Jiun Chen, Shuntaro Ito, Hiroyuki Kai, Kuniaki Nagamine, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji
Angiogenesis plays a critical role in many diseases, including macular degeneration. At present, the pathological mechanisms remain unclear while appropriate models dissecting regulation of angiogenic processes are lacking. We propose an in vitro angiogenesis process and test it by examining the co-culture of human retinal pigmental epithelial cells (ARPE-19) and human umbilical vein endothelial cells (HUVEC) inside a microfluidic device. From characterisation of the APRE-19 monoculture, the tight junction protein (ZO-1) was found on the cells cultured in the microfluidic device but changes in the medium conditions did not affect the integrity of monolayers found in the permeability tests...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28615090/prior-exercise-alters-the-difference-between-arterialised-and-venous-glycaemia-implications-for-blood-sampling-procedures
#16
Robert M Edinburgh, Aaron Hengist, Harry A Smith, James A Betts, Dylan Thompson, Jean-Philippe Walhin, Javier T Gonzalez
Oral glucose tolerance and insulin sensitivity are common measures, but are determined using various blood sampling methods, employed under many different experimental conditions. This study established whether measures of oral glucose tolerance and oral glucose-derived insulin sensitivity (insulin sensitivity indices; ISI) differ when calculated from venous v. arterialised blood. Critically, we also established whether any differences between sampling methods are consistent across distinct metabolic conditions (after rest v...
June 15, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28612217/ox40-promotes-obesity-induced-adipose-inflammation-and-insulin-resistance
#17
Bing Liu, Hengchi Yu, Guangyong Sun, Xiaojing Sun, Hua Jin, Chunpan Zhang, Wen Shi, Dan Tian, Kai Liu, Hufeng Xu, Xinmin Li, Jie Yin, Xu Hong, Dong Zhang
Adaptive immunity plays a critical role in IR and T2DM development; however, the biological mechanisms linking T cell costimulation and glucose metabolism have not been fully elucidated. In this study, we demonstrated that the costimulatory molecule OX40 controls T cell activation and IR development. Inflammatory cell accumulation and enhanced proinflammatory gene expression, as well as high OX40 expression levels on CD4(+) T cells, were observed in the adipose tissues of mice with diet-induced obesity. OX40-KO mice exhibited significantly less weight gain and lower fasting glucose levels than those of WT mice, without obvious adipose tissue inflammation...
June 13, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28610566/the-effect-of-astragalus-polysaccharides-on-attenuation-of-diabetic-cardiomyopathy-through-inhibiting-the-extrinsic-and-intrinsic-apoptotic-pathways-in-high-glucose-stimulated-h9c2-cells
#18
Shuqin Sun, Shuo Yang, Min Dai, Xiujuan Jia, Qiyan Wang, Zheng Zhang, Yongjun Mao
BACKGROUND: Apoptosis plays a critical role in the progression of diabetic cardiomyopathy (DC). Astragalus polysaccharides (APS), an extract of astragalus membranaceus (AM), is an effective cardioprotectant. Currently, little is known about the detailed mechanisms underlying cardioprotective effects of APS. The aims of this study were to investigate the potential effects and mechanisms of APS on apoptosis employing a model of high glucose induction of apoptosis in H9C2 cells. METHODS: A model of high glucose induction of H9C2 cell apoptosis was adopted in this research...
June 13, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28609580/metabolic-defense-against-oxidative-stress-the-road-less-travelled-so-far
#19
REVIEW
Joe Lemire, Azhar Alhasawi, Varun P Appanna, Sujeenthar Tharmalingam, Vasu D Appanna
Bacteria have survived, and many have thrived, since antiquity in the presence of the highly-reactive chalcogen - oxygen (O2 ). They are known to evoke intricate strategies to defend themselves from the reactive by-products of oxygen - reactive oxygen species (ROS). Many of these detoxifying mechanisms have been extensively characterized; superoxide dismutase (SOD), catalases, alkyl hydroperoxide reductase and the glutathione (GSH)-cycling system are responsible for neutralizing specific ROS. Meanwhile, a pool of NADPH - the reductive engine of many ROS-combating enzymes - is maintained by metabolic enzymes including, but not exclusively, glucose-6 phosphate dehydrogenase (G6PDH) and NADP-dependent isocitrate dehydrogenase (ICDH-NADP)...
June 13, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28608285/the-glp-1-analogue-lixisenatide-decreases-atherosclerosis-in-insulin-resistant-mice-by-modulating-macrophage-phenotype
#20
Ángela Vinué, Jorge Navarro, Andrea Herrero-Cervera, Marta García-Cubas, Irene Andrés-Blasco, Sergio Martínez-Hervás, José T Real, Juan F Ascaso, Herminia González-Navarro
AIMS/HYPOTHESIS: Recent clinical studies indicate that glucagon-like peptide-1 (GLP-1) analogues prevent acute cardiovascular events in type 2 diabetes mellitus but their mechanisms remain unknown. In the present study, the impact of GLP-1 analogues and their potential underlying molecular mechanisms in insulin resistance and atherosclerosis are investigated. METHODS: Atherosclerosis development was evaluated in Apoe (-/-) Irs2 (+/-) mice, a mouse model of insulin resistance, the metabolic syndrome and atherosclerosis, treated with the GLP-1 analogues lixisenatide or liraglutide...
June 12, 2017: Diabetologia
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