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https://www.readbyqxmd.com/read/28627440/microrna-21-regulates-hepatic-glucose-metabolism-by-targeting-foxo1
#1
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/28622511/metabolic-adaptation-establishes-disease-tolerance-to-sepsis
#2
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/28611150/effects-of-stress-during-pregnancy-on-hepatic-glucogenic-capacity-in-rat-dams-and-their-fetuses
#3
Kathryn L Franko, Alison J Forhead, Abigail L Fowden
Stress during pregnancy is associated with metabolic dysfunction in the adult offspring in human and other animals. However, little is known about the metabolic effects of pregnancy stress on the mothers and fetuses during pregnancy itself. This study aimed to determine the consequences of the common experimental procedures of injection and single housing in pregnant rats on fetal and maternal hepatic glucogenic capacities. On day (D) 20 of pregnancy, feto-placental weights and the glycogen content and activities of phosphoenolpyruvate carboxykinase (PEPCK) and glucose-6-phosphatase (G6Pase) of fetal and maternal liver were measured in rats pair or single housed from D1 with or without saline injection from D15 to D19...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28589315/effect-of-blood-glucose-level-on-acute-stress-response-of-grass-carp-ctenopharyngodon-idella
#4
Danli Jiang, Yubo Wu, Di Huang, Xing Ren, Yan Wang
Stress has a considerable impact on welfare and productivity of fish, and blood glucose level of fish may be a factor modulating stress response. This study evaluated the effect of blood glucose level and handling on acute stress response of grass carp Ctenopharyngodon idella. Fish were intraperitoneally injected with glucose at 0, 0.2, 0.5, and 1.0 mg g(-1) body mass (BM) and then were exposed to handling for 5 min. Glucose injection resulted in increase of plasma glucose level and liver glycogen content and decrease of plasma lactate level...
June 6, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28565878/ginsenoside-rb3-strengthens-the-hypoglycemic-effect-through-ampk-for-inhibition-of-hepatic-gluconeogenesis
#5
Fanli Meng, Xiaotian Su, Wei Li, Yinan Zheng
Ginsenoside Rb3 is one of the major active components in protopanaxdiol type ginsenosides, and has demonstrated anti-diabetic activity. However, the mechanism of this action has yet to be elucidated. The present study investigated the effects of ginsenoside Rb3 on the AMP-activated protein kinase (AMPK) gluconeogenesis pathway. The present study involved the use of HepG2 cells and western blot analysis to systematically evaluate the effect of ginsenoside Rb3 on AMPK signaling proteins and key factors of gluconeogenesis [phosphoenolpyruvate carboxykinase (PEPCK), glucose-6-phosphatase, forkhead transcription factor 1 (FOXO1) and hepatic nuclear receptor 4α (HNF4α)]...
May 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28564652/roux-en-y-gastric-bypass-improves-hepatic-glucose-metabolism-involving-down-regulation-of-protein-tyrosine-phosphatase-1b-in-obese-rats
#6
Song Mu, Jiayu Liu, Wei Guo, Shuping Zhang, Xiaoqiu Xiao, Zhihong Wang, Jun Zhang
OBJECTIVE: This study was initiated to investigate the effects of Roux-en-Y gastric bypass (RYGB) surgery on hepatic glucose metabolism and hepatic expression of protein tyrosine phosphatase 1B (PTP1B) in obese rats. METHODS: Body weight, glucose, intraperitoneal glucose, insulin, and pyruvate tolerance tests were performed pre- and postoperatively, and plasma lipid, insulin and glucagon-like peptide 1 (GLP-1) were measured. The mRNA levels of G6Pase, Pepck, Gsk-3β and Gys-2, and the expression levels of PTP1B mRNA, protein, and other components of the insulin signaling pathway were measured by using RT-PCR and western blotting...
June 1, 2017: Obesity Facts
https://www.readbyqxmd.com/read/28558013/downregulation-of-sirt1-signaling-underlies-hepatic-autophagy-impairment-in-glycogen-storage-disease-type-ia
#7
Jun-Ho Cho, Goo-Young Kim, Chi-Jiunn Pan, Javier Anduaga, Eui-Ju Choi, Brian C Mansfield, Janice Y Chou
A deficiency in glucose-6-phosphatase-α (G6Pase-α) in glycogen storage disease type Ia (GSD-Ia) leads to impaired glucose homeostasis and metabolic manifestations including hepatomegaly caused by increased glycogen and neutral fat accumulation. A recent report showed that G6Pase-α deficiency causes impairment in autophagy, a recycling process important for cellular metabolism. However, the molecular mechanism underlying defective autophagy is unclear. Here we show that in mice, liver-specific knockout of G6Pase-α (L-G6pc-/-) leads to downregulation of sirtuin 1 (SIRT1) signaling that activates autophagy via deacetylation of autophagy-related (ATG) proteins and forkhead box O (FoxO) family of transcriptional factors which transactivate autophagy genes...
May 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28523926/quantitative-evaluation-of-insulin-resistance-markers-in-pakistani-patients-suffering-from-hcv-associated-type-2-diabetes-mellitus
#8
S N Sabir, S Manzoor, F Parvaiz, M Saalim, E Ghani
The current study was designed to determine the role of the host genes involved in the development of chronic hepatitis C-associated type 2 diabetes mellitus. This study was carried out in patients in four different stages of chronic hepatitis C virus (HCV) infection, including treatment-naïve HCV patients, HCV-positive patients with type 2 diabetes mellitus (T2DM), non-responders and responders. The mRNA expression level of host genes, such as glucose-6-phosphatase (G6Pase), tumor necrosis factor α (TNF-α) and different adipokines including adiponectin, leptin and resistin, was quantified and compared to healthy controls...
2017: Acta Virologica
https://www.readbyqxmd.com/read/28516502/differential-effects-of-exposure-to-parasites-and-bacteria-on-stress-response-in-turbot-scophthalmus-maximus-simultaneously-stressed-by-low-water-depth
#9
J J Rodríguez-Quiroga, C Otero-Rodiño, P Suárez, T P Nieto, J M García Estévez, F San Juan, J L Soengas
The stress response of turbot Scophthalmus maximus was evaluated in fish maintained 8 days under different water depths, normal (NWD, 30 cm depth, total water volume 40 l) or low (LWD, 5 cm depth, total water volume 10 l), in the additional presence of infection-infestation of two pathogens of this species. This was caused by intraperitoneal injection of sublethal doses of the bacterium Aeromonas salmonicida subsp. salmonicida or the parasite Philasterides dicentrarchi (Ciliophora:Scuticociliatida)...
May 17, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28515141/glucagon-induced-extracellular-camp-regulates-hepatic-lipid-metabolism
#10
Sihan Lv, Xinchen Qiu, Jian Li, Jinye Liang, Weida Li, Chao Zhang, Zhenning Zhang, Bing Luan
Hormonal signals help to maintain glucose and lipid homeostasis in the liver during periods of fasting. Glucagon, a pancreas-derived hormone induced by fasting, promotes gluconeogenesis through induction of intracellular cAMP production. Glucagon also stimulates hepatic fatty acid oxidation but the underlying mechanism is poorly characterized. Here we reported that following the acute induction of gluconeogenic genes Glucose 6 phosphatase (G6Pase) and Phosphoenolpyruvate carboxykinase (Pepck) expression through CREB, glucagon triggers a second delayed phase of fatty acid oxidation genes Acyl-coenzyme A oxidase (Aox) and Carnitine palmitoyltransferase 1a (Cpt1a) expression via extracellular cAMP...
May 17, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28500893/glucagon-receptor-knockout-mice-are-protected-against-acute-olanzapine-induced-hyperglycemia
#11
Laura N Castellani, Willem T Peppler, Charles D Sutton, Jamie Whitfield, Maureen J Charron, David C Wright
OBJECTIVES: To determine if glucagon is involved in mediating the increase in blood glucose levels caused by the second-generation antipsychotic drug olanzapine. MATERIALS AND METHODS: Whole body glucagon receptor deficient mice (Gcgr(-/-)) or WT littermate controls were injected with olanzapine (5mg/kg BW IP) and changes in blood glucose measured over the following 120min. Separate cohorts of mice were treated with olanzapine and changes in pyruvate tolerance, insulin tolerance and whole body substrate oxidation were determined...
May 3, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28490809/hepatic-estrogen-receptor-%C3%AE-is-critical-for-regulation-of-gluconeogenesis-and-lipid-metabolism-in-males
#12
Shuiqing Qiu, Juliana Torrens Vazquez, Erin Boulger, Haiyun Liu, Ping Xue, Mehboob Ali Hussain, Andrew Wolfe
Impaired estrogens action is associated with features of the metabolic syndrome in animal models and humans. We sought to determine whether disruption of hepatic estrogens action in adult male mice could recapitulate aspects of the metabolic syndrome to understand the mechanistic basis for the phenotype. We found 17β-estradiol (E2) inhibited hepatic gluconeogenic genes such as phosphoenolpyruvate carboxykinase 1 (Pck-1) and glucose 6-phosphatase (G6Pase) and this effect was absent in mice lacking liver estrogen receptor α (Esr1) (LERKO mice)...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28487991/blood-glycemia-modulating-effects-of-melanian-snail-protein-hydrolysates-in-mice-with-type%C3%A2-ii-diabetes
#13
Jae-Suk Choi, Joo-Wan Kim, Jeong Been Park, Sang Eun Pyo, Yong-Ki Hong, Sae Kwang Ku, Mi-Ryung Kim
Freshwater animal proteins have long been used as nutrient supplements. In this study, melanian snail (Semisulcospira libertina) protein hydrolysates (MPh) were found to exert anti-diabetic and protective effects against liver and kidney damage in mice with type II diabetes adapted to a 45% kcal high-fat diet (HFD). The hypoglycemic, hepatoprotective and nephroprotective effects of MPh were analyzed after 12 weeks of the continuous oral administration of MPh at 125, 250 and 500 mg/kg. Diabetic control mice exhibited an increase in body weight, and blood glucose and insulin levels, with a decrease in serum high-density lipoprotein (HDL) levels...
June 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28429187/curcumin-reverses-the-depressive-like-behavior-and-insulin-resistance-induced-by-chronic-mild-stress
#14
Ji-Duo Shen, Yu Wei, Yu-Jie Li, Jing-Yi Qiao, Yu-Cheng Li
Increasing evidence has demonstrated that patients with depression have a higher risk of developing type 2 diabetes. Insulin resistance has been identified as the key mechanism linking depression and diabetes. The present study established a rat model of depression complicated by insulin resistance using a 12-week exposure to chronic mild stress (CMS) and investigated the therapeutic effects of curcumin. Sucrose intake tests were used to evaluate depressive-like behaviors, and oral glucose tolerance tests (OGTT) and intraperitoneal insulin tolerance tests (IPITT) were performed to evaluate insulin sensitivity...
April 21, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28414056/protective-effects-of-glycyrrhizic-acid-against-non-alcoholic-fatty-liver-disease-in-mice
#15
Xue Sun, Xingping Duan, Changyuan Wang, Zhihao Liu, Pengyuan Sun, Xiaokui Huo, Xiaodong Ma, Huijun Sun, Kexin Liu, Qiang Meng
Non-alcoholic fatty liver disease (NAFLD) has become a predictive factor of death from many diseases. The purpose of the present study is to investigate the protective effect of glycyrrhizic acid (GA), a natural triterpene glycoside, on NAFLD induced by a high-fat diet (HFD) in mice, and further to elucidate the mechanisms underlying GA protection. GA treatment significantly reduced the relative liver weight, serum ALT, AST activities, levels of serum lipid, blood glucose and insulin. GA suppressed lipid accumulation in liver...
April 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28397058/clinical-and-biochemical-heterogeneity-between-patients-with-glycogen-storage-disease-type-ia-the-added-value-of-cusum-for-metabolic-control
#16
Fabian Peeks, Thomas A H Steunenberg, Foekje de Boer, M Estela Rubio-Gozalbo, Monique Williams, Rob Burghard, Fabienne Rajas, Maaike H Oosterveer, David A Weinstein, Terry G J Derks
OBJECTIVE: To study heterogeneity between patients with glycogen storage disease type Ia (GSD Ia), a rare inherited disorder of carbohydrate metabolism caused by the deficiency of glucose-6-phosphatase (G6Pase). STUDY DESIGN: Descriptive retrospective study of longitudinal clinical and biochemical data and long-term complications in 20 GSD Ia patients. We included 11 patients with homozygous G6PC mutations and siblings from four families carrying identical G6PC genotypes...
April 10, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28396610/modulation-of-glucose-metabolism-by-a-natural-compound-from-chloranthus-japonicus-via-activation-of-amp-activated-protein-kinase
#17
Rongkuan Hu, Huan Yan, Xiaoyan Fei, Haiyang Liu, Jiarui Wu
AMP-activated protein kinase (AMPK) is a key sensor and regulator of glucose metabolism. Here, we demonstrated that shizukaol F, a natural compound isolated from Chloranthus japonicus, can activate AMPK and modulate glucose metabolism both in vitro and in vivo. Shizukaol F increased glucose uptake in differentiated C2C12 myotubes by stimulating glucose transporter-4 (GLUT-4) membraned translocation. Treatment of primary mouse hepatocytes with shizukaol F decreased the expression of phosphoenolpyruvate carboxykinase 2 (PEPCK), glucose-6-phosphatase (G6Pase) and suppressed hepatic gluconeogenesis...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28392962/anti-diabetic-effects-of-an-ethanol-extract-of-cassia-abbreviata-stem-bark-on-diabetic-rats-and-possible-mechanism-of-its-action-anti-diabetic-properties-of-cassia-abbreviata
#18
Keagile Bati, Tebogo Elvis Kwape, Padmaja Chaturvedi
OBJECTIVES: This study aimed to evaluate the hypoglycemic effects of an ethanol extract of Cassia abbreviata (ECA) bark and the possible mechanisms of its action in diabetic albino rats. METHODS: ECA was prepared by soaking the powdered plant material in 70% ethanol. It was filtered and made solvent-free by evaporation on a rotary evaporator. Type 2 diabetes was induced in albino rats by injecting 35 mg/kg body weight (bw) of streptozotocin after having fed the rats a high-fat diet for 2 weeks...
March 2017: Journal of Pharmacopuncture
https://www.readbyqxmd.com/read/28391590/effects-of-heat-stress-on-the-renal-and-branchial-carbohydrate-metabolism-and-antioxidant-system-of-antarctic-fish
#19
Mariana Forgati, Priscila Krebsbach Kandalski, Tatiana Herrerias, Tania Zaleski, Cintia Machado, Maria Rosa Dmengeon Pedreiro Souza, Lucélia Donatti
The objective of the present study was to assess the effect of short-term (2-144 h) heat stress (8 °C) on energy production processes and antioxidant defense systems in the kidneys and gills of Notothenia rossii and Notothenia coriiceps. Heat stress affected energy metabolism and oxidative stress parameters in a time-, tissue-, and species-dependent manner, and gills were more sensitive than kidneys to heat stress. N. rossii kidneys were able to stabilize carbohydrate metabolism after 12 h of heat stress, whereas the glycogen levels in N...
April 8, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28379184/the-effect-of-phloroglucinol-a-component-of-ecklonia-cava-extract-on-hepatic-glucose-production
#20
Ji-Young Yoon, Hojung Choi, Hee-Sook Jun
Phloroglucinol is a phenolic compound that is one of the major compounds in Ecklonia cava (brown alga). It has many pharmacological activities, but its anti-diabetic effect is not yet fully explored. In this study, we investigated the effect of phloroglucinol on the control of blood glucose levels and the regulation of hepatic glucose production. Phloroglucinol significantly improved glucose tolerance in male C57BL/6J mice fed a high fat diet (HFD) and inhibited glucose production in mouse primary hepatocytes...
April 5, 2017: Marine Drugs
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