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Glucose Metabolism

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https://www.readbyqxmd.com/read/28340340/selective-chemical-inhibition-of-pgc-1%C3%AE-gluconeogenic-activity-ameliorates-type-2-diabetes
#1
Kfir Sharabi, Hua Lin, Clint D J Tavares, John E Dominy, Joao Paulo Camporez, Rachel J Perry, Roger Schilling, Amy K Rines, Jaemin Lee, Marc Hickey, Melissa Bennion, Michelle Palmer, Partha P Nag, Joshua A Bittker, José Perez, Mark P Jedrychowski, Umut Ozcan, Steve P Gygi, Theodore M Kamenecka, Gerald I Shulman, Stuart L Schreiber, Patrick R Griffin, Pere Puigserver
Type 2 diabetes (T2D) is a worldwide epidemic with a medical need for additional targeted therapies. Suppression of hepatic glucose production (HGP) effectively ameliorates diabetes and can be exploited for its treatment. We hypothesized that targeting PGC-1α acetylation in the liver, a chemical modification known to inhibit hepatic gluconeogenesis, could be potentially used for treatment of T2D. Thus, we designed a high-throughput chemical screen platform to quantify PGC-1α acetylation in cells and identified small molecules that increase PGC-1α acetylation, suppress gluconeogenic gene expression, and reduce glucose production in hepatocytes...
March 23, 2017: Cell
https://www.readbyqxmd.com/read/28339731/obesity-associated-cardiac-pathogenesis-in-broiler-breeder-hens-development-of-metabolic-cardiomyopathy2-3
#2
C Y Chen, Y F Huang, Y J Ko, Y J Liu, Y H Chen, R L Walzem, S E Chen
Feed intake is typically restricted (R) in broiler hens to avoid obesity and improve egg production and livability. To determine whether improved heart health contributes to improved livability, fully adult 45-week-old R hens were allowed to consume feed to appetite (ad libitum; AL) up to 10 wk (70 d). Mortality, contractile functions, and morphology at 70 d, and measurements of cardiac hypertrophic remodeling at 7 d and 21 d were made and compared between R and AL hens. Outcomes for cardiac electrophysiology and mortality, reported separately, found increased mortality in AL hens in association with cardiac pathological hypertrophy and contractile dysfunction...
February 22, 2017: Poultry Science
https://www.readbyqxmd.com/read/28339345/alanine-aminotransferase-is-a-marker-of-lipotoxicity-consequences-and-hyperandrogenemia-in-women-with-polycystic-ovary-syndrome
#3
Matea Belan, Chloé Pelletier, Jean-Patrice Baillargeon
BACKGROUND: Several studies have reported higher levels of Alanine aminotransferase (ALT) in women with polycystic ovary syndrome (PCOS) compared with control subjects. Plasma ALT levels are considered a marker of hepatic lipotoxicity because of their significant associations with different hepatic metabolic dysfunctions, such as hepatic steatosis and hepatic insulin resistance. METHODS: Retrospective chart review aiming to assess, in PCOS women, the relationship between ALT levels and measures of lipotoxicity consequences that are available clinically, both during fasting and using the oral glucose tolerance test...
April 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28339090/inhibition-of-farnesyl-pyrophosphate-synthase-attenuates-high-glucose%C3%A2-induced-vascular-smooth-muscle-cells-proliferation
#4
Guo-Ping Chen, Xiao-Qin Zhang, Tao Wu, Jie Han, Dan Ye
The proliferation of vascular smooth muscle cells (VSMCs) is one of the main features of atherosclerosis accelerated by hyperglycemia. Our previous studies found that farnesyl pyrophosphate synthase (FPPS, EC 2.5.1.10), an essential enzyme in the mevalonate pathway, was upregulated in aorta media from diabetic mice along with the process of atherosclerosis. However, the exact role of FPPS in high glucose‑induced proliferation of VSMCs is largely unclear. In our study, we found that alendronate (an FPPS inhibitor) attenuated diabetic accelerated atherosclerosis in vivo and suppressed high glucose‑induced VSMCs proliferation in vitro...
March 23, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28338809/resveratrol-derivative-btm-0512-mitigates-obesity-by-promoting-beige-remodeling-of-subcutaneous-preadipocytes
#5
Qingqing Li, Kuansong Wang, Yipeng Ma, Chunxiang Qin, Changsheng Dong, Ping Jin, Yan Wu, Xiaoming Xiong, Niansheng Li, Changping Hu, Jun Peng, Zhichun Yang
Recent studies revealed that sirtuin 1 (SIRT1) is involved in the regulation of energy metabolism and its agonist resveratrol showed anti-obesity effect. This study aims to determine whether BTM-0512, a novel derivative of resveratrol, acts as an antagonist of obesity and to explore its possible mechanisms. High-fat diet (HFD)-induced obese mice were intragastrically administered with BTM-0512 (5, 10, and 20 mg/kg/day) or resveratrol (10 mg/kg/day). It was found that the body weight, Lee's index, ratio of visceral adipose tissue (VAT) to body weight, and blood glucose were significantly reduced in BTM-0512-treated mice when compared with those in mice treated with resveratrol...
February 24, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28338608/impact-of-high-carbohydrate-diet-on-metabolic-parameters-in-patients-with-type-2-diabetes
#6
REVIEW
Chan-Hee Jung, Kyung Mook Choi
In patients with type 2 diabetes mellitus (T2DM), whether dietary carbohydrates have beneficial or detrimental effects on cardiometabolic risk factors has drawn attention. Although a high-carbohydrate (HC) diet and a low-carbohydrate (LC) diet have gained popularity for several decades, there is scarce review focusing on the effects of HC diet on glucose, lipids and body weight in patients with T2DM. In this review, we examined recently-published literature on the effects of HC diets on metabolic parameters in T2DM...
March 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28338477/osmotic-and-hemodynamic-effects-of-hypertonic-glucose-during-hemodialysis
#7
Daniel Schneditz, Stanisław Niemczyk, Notburga Sauseng, Isolde Bachler, Edda Zierler, Helmut Karl Lackner, Hildegard Hafner-Giessauf
It was the purpose to quantify the hemodynamic effects of a bolus of hypertonic glucose injected into the extracorporeal system in a group of stable and non-diabetic patients during hemodialysis (HD).Glucose and electrolytes were measured in frequent intervals. Arterial blood pressures and heart rates were continuously recorded by non-invasive vascular unloading technique. Beat-to-beat stroke volume, cardiac output, and total peripheral resistance were determined by Modelflow method. Relative blood volumes were continuously measured by ultrasonic and optical means...
March 22, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28337802/the-snf1-activating-kinase-sak1-is-a-key-regulator-of-metabolic-adaptation-and-in-vivo-fitness-of-candida-albicans
#8
Bernardo Ramírez-Zavala, Austin Mottola, Julia Haubenreißer, Sabrina Schneider, Stefanie Allert, Sascha Brunke, Knut Ohlsen, Bernhard Hube, Joachim Morschhäuser
The metabolic flexibility of the opportunistic fungal pathogen Candida albicans is important for colonisation and infection of different host niches. Complex regulatory networks, in which protein kinases play central roles, link metabolism and other virulence-associated traits, such as filamentous growth and stress resistance, and thereby control commensalism and pathogenicity. By screening a protein kinase deletion mutant library that was generated in the present work using an improved SAT1 flipper cassette, we found that the previously uncharacterised kinase Sak1 is a key upstream activator of the protein kinase Snf1, a highly conserved regulator of nutrient stress responses that is essential for viability in C...
March 23, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28337257/subcutaneous-liraglutide-ameliorates-methylglyoxal-induced-alzheimer-like-tau-pathology-and-cognitive-impairment-by-modulating-tau-hyperphosphorylation-and-glycogen-synthase-kinase-3%C3%AE
#9
Liqin Qi, Zhou Chen, Yanping Wang, Xiaoying Liu, Xiaohong Liu, Linfang Ke, Zhongjie Zheng, Xiaowei Lin, Yu Zhou, Lijuan Wu, Libin Liu
Memory deterioration and synapse damage with accumulation of β-amyloid and hyperphosphorylated tau are hallmark lesions of Alzheimer's disease (AD). Methylglyoxal (MG), a key intermediate of glucose metabolism, is elevated in AD brains and modifies Aβ42, increasing misfolding and leading to the accumulation of senile plaques. Liraglutide, an analog of glucagon-like peptide-1 (GLP-1), is neurotrophic and neuroprotective. However, whether liraglutide can protect against AD-like memory-related deficits and tau hyperphosphorylation caused by MG in vivo is not known...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28337200/metabolic-hallmarks-of-tumor-and-immune-cells-in-the-tumor-microenvironment
#10
REVIEW
Kathrin Renner, Katrin Singer, Gudrun E Koehl, Edward K Geissler, Katrin Peter, Peter J Siska, Marina Kreutz
Cytotoxic T lymphocytes and NK cells play an important role in eliminating malignant tumor cells and the number and activity of tumor-infiltrating T cells represent a good marker for tumor prognosis. Based on these findings, immunotherapy, e.g., checkpoint blockade, has received considerable attention during the last couple of years. However, for the majority of patients, immune control of their tumors is gray theory as malignant cells use effective mechanisms to outsmart the immune system. Increasing evidence suggests that changes in tumor metabolism not only ensure an effective energy supply and generation of building blocks for tumor growth but also contribute to inhibition of the antitumor response...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28337199/nutrient-and-metabolic-sensing-in-t-cell-responses
#11
REVIEW
Jun Wei, Jana Raynor, Thanh-Long M Nguyen, Hongbo Chi
T cells play pivotal roles in shaping host immune responses in infectious diseases, autoimmunity, and cancer. The activation of T cells requires immune and growth factor-derived signals. However, alterations in nutrients and metabolic signals tune T cell responses by impinging upon T cell fates and immune functions. In this review, we summarize how key nutrients, including glucose, amino acids, and lipids, and their sensors and transporters shape T cell responses. We also briefly discuss regulation of T cell responses by oxygen and energy sensing mechanisms...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28337178/glucose-uptake-in-prochlorococcus-diversity-of-kinetics-and-effects-on-the-metabolism
#12
María Del Carmen Muñoz-Marín, Guadalupe Gómez-Baena, Jesús Díez, Robert J Beynon, David González-Ballester, Mikhail V Zubkov, José M García-Fernández
We have previously shown that Prochlorococcus sp. SS120 strain takes up glucose by using a multiphasic transporter encoded by the Pro1404 gene. Here, we studied the glucose uptake kinetics in multiple Prochlorococcus strains from different ecotypes, observing diverse values for the Ks constants (15-126.60 nM) and the uptake rates (0.48-6.36 pmol min(-1) mg prot(-1)). Multiphasic kinetics was observed in all studied strains, except for TAK9803-2. Pro1404 gene expression studies during the 21st Atlantic Meridional Transect cruise showed positive correlation with glucose concentrations in the ocean...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28337034/exposure-to-an-acute-hypoxic-stimulus-during-early-life-affects-the-expression-of-glucose-metabolism-related-genes-at-first-feeding-in-trout
#13
Jingwei Liu, Elisabeth Plagnes-Juan, Inge Geurden, Stéphane Panserat, Lucie Marandel
Rainbow trout (Oncorhynchus mykiss) is considered a "glucose-intolerant" species. With the aim of programming trout to improve their metabolic use of dietary carbohydrates, we hypothesised that a hypoxic stimulus applied during embryogenesis could later affect glucose metabolism at the first-feeding stage. An acute hypoxic stimulus (2.5 or 5.0 mg·L(-1) O2) was applied for 24 h to non-hatched embryos or early hatched alevins followed by a challenge test with a high carbohydrate diet at first-feeding. The effectiveness of the early hypoxic stimulus was confirmed by the induction of oxygen-sensitive markers such as egln3...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336548/nutrient-sensing-by-absorptive-and-secretory-progenies-of-small-intestinal-stem-cells
#14
Kunihiro Kishida, Sarah C Pearce, Shiyan Yu, Nan Gao, Ronaldo P Ferraris
Nutrient sensing triggers responses by the gut-brain axis modulating hormone release, feeding behavior and metabolism that become dysregulated in metabolic syndrome and some cancers. Except for absorptive enterocytes and secretory enteroendocrine cells, the ability of many intestinal cell types to sense nutrients is still unknown, hence we hypothesized that progenitor stem cells (ISC) possess nutrient sensing ability inherited by progenies during differentiation. We directed via modulators of Wnt and Notch signaling, differentiation of precursor mouse intestinal crypts into specialized organoids each containing ISC, enterocyte, goblet or Paneth cells at relative proportions much higher than in situ as determined by mRNA expression and immunocytochemistry of cell type biomarkers...
March 23, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28336399/synthetic-matrix-of-polyether-polyurethane-as-a-biological-platform-for-pancreatic-regeneration
#15
Luciana Xavier Pereira, Celso Tarso Rodrigues Viana, Laura Alejandra Ariza Orellano, Simone Aparecida de Almeida, Anilton Cesar Vasconcelos, Alfredo de Miranda Goes, Alexander Birbrair, Silvia Passos Andrade, Paula Peixoto Campos
AIMS: Several alternative cellular approaches using biomaterials to host insulin-producing cells derived from stem cells have been developed to overcome the limitations of type 1 diabetes treatment (exogenous insulin injection). However, none seem to fulfill all requirements needed to induce pancreatic cells successful colonization of the scaffolds. Here, we report a polymeric platform adherent to the native mice pancreas filled with human adipose stem cells (hASCs) that was able to induce growth of pancreatic parenchyma...
March 20, 2017: Life Sciences
https://www.readbyqxmd.com/read/28336389/metformin-ameliorates-uterine-defects-in-a-rat-model-of-polycystic-ovary-syndrome
#16
Yuehui Zhang, Min Hu, Fanci Meng, Xiaoyan Sun, Hongfei Xu, Jiao Zhang, Peng Cui, Njomeza Morina, Xin Li, Wei Li, Xiao-Ke Wu, Mats Brännström, Ruijin Shao, Håkan Billig
Adult rats treated concomitantly with insulin and human chorionic gonadotropin exhibit endocrine, metabolic, and reproductive abnormalities that are very similar to those observed in polycystic ovary syndrome (PCOS) patients. In this study, we used this rat model to assess the effects of metformin on PCOS-related uterine dysfunction. In addition to reducing androgen levels, improving insulin sensitivity, and correcting the reproductive cycle, metformin treatment induced morphological changes in the PCOS-like uterus...
March 18, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28336108/vitamin-d-increases-ppar%C3%AE-expression-and-promotes-beneficial-effects-of-physical-activity-in-metabolic-syndrome
#17
Rastegar Hoseini, Arsalan Damirchi, Parvin Babaei
OBJECTIVES: Peroxisome proliferator-activated receptor (PPAR) and vitamin D signaling pathways regulate a multitude of genes involved in different physiological functions. The aim of the present study was to examine the effects of vitamin D supplementation and aerobic training on metabolic syndrome and PPARγ expression. METHODS: Forty female ovariectomized rats were divided into five groups of aerobic training with high (OVX + Exe + HD), moderate (OVX + Exe + MD), and low dose of vitamin D (OVX + Exe + LD), aerobic training receving vehicle (sesame oil; OVX + Exe + oil), and sham-operated control (sham) groups...
April 2017: Nutrition
https://www.readbyqxmd.com/read/28336086/incretin-hormones-regulate-microglia-oxidative-stress-survival-and-expression-of-trophic-factors
#18
Lindsay Joy Spielman, Deanna Lynn Gibson, Andis Klegeris
The incretin hormones glucagon-like peptide (GLP)-1 and glucose-dependent insulinotropic polypeptide (GIP) are primarily known for their metabolic function in the periphery. GLP-1 and GIP are secreted by intestinal endocrine cells in response to ingested nutrients. Both GLP-1 and GIP stimulate the production and release of insulin from pancreatic β cells as well as exhibit several growth-regulating effects on peripheral tissues. GLP-1 and GIP are also present in the brain, where they provide modulatory and anti-apoptotic signals to neurons...
March 8, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28335761/the-effects-of-jiao-tai-wan-on-sleep-inflammation-and-insulin-resistance-in-obesity-resistant-rats-with-chronic-partial-sleep-deprivation
#19
Xin Zou, Wenya Huang, Fuer Lu, Ke Fang, Dingkun Wang, Shuyong Zhao, Jiming Jia, Lijun Xu, Kaifu Wang, Nan Wang, Hui Dong
BACKGROUND: Jiao-Tai-Wan (JTW), composed of Rhizome Coptidis and Cortex Cinnamomi, is a classical traditional Chinese prescription for treating insomnia. Several in vivo studies have concluded that JTW could exert its therapeutical effect in insomnia rats. However, the specific mechanism is still unclear. The present study aimed to explore the effect of JTW on sleep in obesity-resistant (OR) rats with chronic partial sleep deprivation (PSD) and to clarify its possible mechanism. METHODS: JTW was prepared and the main components contained in the granules were identified by 3D-High Performance Liquid Chromatography (3D-HPLC) assay...
March 23, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28335697/investigation-of-a-lifestyle-intervention-in-women-at-high-risk-of-breast-cancer
#20
Claire J Han, Larissa A Korde, Scott Reding, Kristen Allott, Matt Van Doren, Yvonne Schwarz, Catalina Vaughan, Kerryn W Reding
One fourth of breast cancer can be attributed to sedentary lifestyles and being overweight or obese. This pilot study was conducted to explore whether a 6-month lifestyle intervention affected body composition and obesity-related biomarkers among women at high risk of breast cancer. Overweight/obese women at high risk of breast cancer were randomized to the control group or to the intervention. The intervention was an individually tailored, cognitive-behavioral therapy program that assists women in identifying strategies to improve their nutrition and physical activity habits with the goal of reduced adiposity...
March 1, 2017: Western Journal of Nursing Research
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