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https://www.readbyqxmd.com/read/29335519/metabolic-reprogramming-by-pck1-promotes-tca-cataplerosis-oxidative-stress-and-apoptosis-in-liver-cancer-cells-and-suppresses-hepatocellular-carcinoma
#1
Meng-Xi Liu, Lei Jin, Si-Jia Sun, Peng Liu, Xu Feng, Zhou-Li Cheng, Wei-Ren Liu, Kun-Liang Guan, Ying-Hong Shi, Hai-Xin Yuan, Yue Xiong
Phosphoenolpyruvate carboxykinase (PEPCK or PCK) catalyzes the first rate-limiting step in hepatic gluconeogenesis pathway to maintain blood glucose levels. Mammalian cells express two PCK genes, encoding for a cytoplasmic (PCPEK-C or PCK1) and a mitochondrial (PEPCK-M or PCK2) isoforms, respectively. Increased expressions of both PCK genes are found in cancer of several organs, including colon, lung, and skin, and linked to increased anabolic metabolism and cell proliferation. Here, we report that the expressions of both PCK1 and PCK2 genes are downregulated in primary hepatocellular carcinoma (HCC) and low PCK expression was associated with poor prognosis in patients with HCC...
January 16, 2018: Oncogene
https://www.readbyqxmd.com/read/29329085/an-integrated-approach-to-assess-the-impacts-of-zinc-pyrithione-at-different-levels-of-biological-organization-in-marine-mussels
#2
Lorna J Dallas, Andrew Turner, Tim P Bean, Brett P Lyons, Awadhesh N Jha
The mechanisms of sublethal toxicity of the antifouling biocide, zinc pyrithione (ZnPT), have not been well-studied. This investigation demonstrates that 14-d sublethal exposure to ZnPT (0.2 or 2 μM, alongside inorganic Zn and sea water controls) is genotoxic to mussel haemocytes but suggests that this is not caused by oxidative DNA damage as no significant induction of oxidised purines was detected by Fpg-modified comet assay. More ecologically relevant endpoints, including decreased clearance rate (CR), cessation of attachment and decreased tolerance of stress on stress (SoS), also showed significant response to ZnPT exposure...
December 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/29327229/leopoldia-comosa-prevents-metabolic-disorders-in-rats-with-high-fat-diet-induced-obesity
#3
T Casacchia, F Scavello, C Rocca, M C Granieri, G Beretta, D Amelio, F Gelmini, A Spena, R Mazza, C C Toma, Tommaso Angelone, Giancarlo Statti, T Pasqua
PURPOSE: Obesity is the main feature of a complex illness known as metabolic syndrome. Anti-obesogenic therapies are often associated with side effects and represent a high cost in conventional pharmacological approaches. New strategies based on natural remedies are under continuous investigation. Leopoldia comosa (L.) Parl. (L. comosa) is a spontaneous plant with diuretic, anti-inflammatory and antioxidant properties. Recently, a hypoglycemic activity mediated by inhibition of carbohydrate digestion has been identified...
January 11, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29325290/-effect-of-hepatitis-c-virus-nonstructural-protein-5a-and-its-domains-ii-on-hepatocyte-gluconeogenesis-in-mice
#4
J J Zhang, Q Liu, L Qiao
Objective: To investigate the role of hepatitis C virus nonstructural protein 5A (NS5A) and its domains I, II, and III in regulating gluconeogenesis in mice and the underlying mechanism. Methods: A total of 60 male C57BL/6J mice were randomly divided into six groups. Recombinant lentiviral particles with specific expression of full-length NS5A, NS5A domain I, NS5A domain II, or NS5A domain III were injected via the caudal vein to establish a mouse model, and the group without injection and the group with the injection of the lentiviral particles containing enhanced green fluorescent protein (EGFP) were established as negative control...
December 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29305881/liver-carbohydrates-metabolism-a-new-islet-neogenesis-associated-protein-peptide-ingap-pp-target
#5
Hernán Gonzalo Villagarcía, Carolina Lisi Román, María Cecilia Castro, Luisa Arbeláez González, María Teresa Ronco, Daniel Eleazar Francés, María Laura Massa, Bárbara Maiztegui, Luis Emilio Flores, Juan José Gagliardino, Flavio Francini
Islet-Neogenesis Associated Protein-Pentadecapeptide (INGAP-PP) increases β-cell mass and enhances glucose and amino acids-induced insulin secretion. Our aim was to demonstrate its effect on liver metabolism. For that purpose, adult male Wistar rats were injected twice-daily (10 days) with saline solution or INGAP-PP (250 μg). Thereafter, serum glucose, triglyceride and insulin levels were measured and homeostasis model assessment (HOMA-IR) and hepatic insulin sensitivity (HIS) were determined. Liver glucokinase and glucose-6-phosphatase (G-6-Pase) expression and activity, phosphoenolpyruvate carboxykinase (PEPCK) expression, phosphofructokinase-2 (PFK-2) protein content, P-Akt/Akt and glycogen synthase kinase-3β (P-GSK3/GSK3) protein ratios and glycogen deposit were also determined...
January 3, 2018: Peptides
https://www.readbyqxmd.com/read/29303609/buffering-agent-induced-lactose-content-increases-via-growth-hormone-mediated-activation-of-gluconeogenesis-in-lactating-goats
#6
L Li, M L He, Y Liu, Y S Zhang
Dairy goats are often fed a high-concentrate (HC) diet to meet their lactation demands; however, long-term concentrate feeding is unhealthy and leads to milk yield and lactose content decreases. Therefore, we tested whether a buffering agent is able to increase the output of glucose in the liver and influence lactose synthesis. Eight lactating goats were randomly assigned to two groups: one group received a HC diet (Concentrate : Forage = 6:4, HG) and the other group received the same diet with a buffering agent added (0...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29187710/hybrid-origin-of-asian-aspermic-fasciola-flukes-is-confirmed-by-analyzing-two-single-copy-genes-pepck-and-pold
#7
Kei Hayashi, Madoka Ichikawa-Seki, Uday Kumar Mohanta, Takuya Shoriki, Pannigan Chaichanasak, Tadashi Itagaki
Nuclear gene markers, phosphoenolpyruvate carboxykinase (pepck) and DNA polymerase delta (pold), have been developed for precise discrimination of Fasciola flukes instead of internal transcribed spacer 1. In this study, these two genes of 730 Fasciola flukes from eight Asian countries were analyzed. The results were compared with their mitochondrial NADH dehydrogenase subunit 1 (nad1) lineages for obtaining a definitive evidence of the hybrid origin of aspermic Fasciola flukes. All the flukes categorized into the aspermic nad1 lineages possessed both the fragment patterns of F...
November 29, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29159216/data-on-the-decreased-expression-of-foxo1-by-mir-1271-in-hepg2-hepatocytes
#8
Won-Mo Yang, Kyung-Ho Min, Se-Whan Park, Wan Lee
Obesity and metabolic diseases are closely associated with insulin resistance. Obesity-induced miRNAs are also considered to be potential contributors to the development of insulin resistance and type 2 diabetes. Previously, the expression of miR-1271 was reported to be upregulated in the liver of diet-induced obese mice (Yang et al., 2016) [1]. In this data article, multiple in silico analysis predicted FOXO1 gene to be a direct target of miR-1271. Dual luciferase reporter gene analysis showed that miR-1271 suppressed FOXO1 expression by direct binding to 3'UTR...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29159212/data-on-the-expression-of-pepck-in-hepg2-hepatocytes-transfected-with-mir-195
#9
Won-Mo Yang, Kyung-Ho Min, Se-Whan Park, Wan Lee
Dietary fats rich in saturated fatty acid (SFA) increase the risk of metabolic diseases, and certain microRNAs (miRNAs) dysregulated by SFA are associated with the pathogenesis of insulin resistance and type 2 diabetes. A previous study found that miR-195 is increased by SFA and impairs hepatic insulin signaling through the suppression of INSR (Yang et al., 2014) [1]. This article reports accompanying data to determine the effect of miR-195 on the expression of PEPCK, a key player in hepatic gluconeogenesis...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29144887/rosiglitazone-is-superior-to-resveratrol-in-inducing-the-expression-of-glyceroneogenic-genes-in-adipose-tissue-from-obese-participants
#10
Marie-Soleil Beaudoin, Nicholas Gaudio, John K Reed, Jules Foute-Nelong, David M Mutch, David C Wright
We compared the effects of resveratrol and rosiglitazone, alone and in combination, on indices of fatty acid re-esterification in cultured adipose tissue from obese participants (n=17) undergoing gastric bypass. Rosiglitazone induced PDK4 and PEPCK gene expression to a greater extent than resveratrol. Co-treatment with both compounds induced PDK4 and PEPCK expression in parallel with reductions in the fatty acid to glycerol ratio. Our findings suggest beneficial effects of resveratrol and rosiglitazone co-treatment...
November 16, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29109794/ginsenoside-rg1-inhibits-glucagon-induced-hepatic-gluconeogenesis-through-akt-foxo1-interaction
#11
Qun Liu, Fei-Ge Zhang, Wen-Song Zhang, An Pan, Yi-Lin Yang, Jin-Feng Liu, Ping Li, Bao-Lin Liu, Lian-Wen Qi
Rationale: Glucagon is involved in hepatic gluconeogenesis, playing a key role in type 2 diabetes. Ginsenosides are reported to have antidiabetic activities. Ginsenoside Rg1 is a major propanaxatriol-type saponin in ginseng. This study aims to investigate the regulatory effects of Rg1 on glucagon-induced hepatic glucose production. Methods: The effects of Rg1 were investigated in high-fat-diet (HFD)-fed mice and glucagon-challenged C57BL/6J mice. Glucose metabolism was evaluated by oral glucose tolerance test and pyruvate tolerance test...
2017: Theranostics
https://www.readbyqxmd.com/read/29107025/association-of-changes-in-er-stress-mediated-signaling-pathway-with-lead-induced-insulin-resistance-and-apoptosis-in-rats-and-their-prevention-by-a-type-dimeric-epigallocatechin-3-gallate
#12
Chan-Min Liu, Jie-Qiong Ma, Jian-Mei Sun, Zhao-Jun Feng, Chao Cheng, Wei Yang, Hong Jiang
A-type dimeric epigallocatechin-3-gallate (A-type-EGCG-dimer, AEd), a new proanthocyanidins dimer from persimmon fruits, has been shown to have health benefit effects. However, A-type-EGCG-dimer affects gluose metabolism in the liver and the underlying mechanism is not clarified. The present study aims to examine the protective effects of A-type-EGCG-dimer on Pb-induced hepatic insulin resistance, endoplasmic reticulum (ER) stress and apoptosis in rats. Male wistar rats exposed to 0.05% w/v Pb acetate in the drinking water with or without A-type-EGCG-dimer coadministration (200 mg/kg body weight/day, intragastrically) for three months...
October 27, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29099085/eburicoic-acid-a-triterpenoid-compound-from-antrodia-camphorata-displays-antidiabetic-and-antihyperlipidemic-effects-in-palmitate-treated-c2c12-myotubes-and-in-high-fat-diet-fed-mice
#13
Cheng-Hsiu Lin, Yueh-Hsiung Kuo, Chun-Ching Shih
This study was designed to investigate the antidiabetic and antihyperlipidemic effects and mechanisms of eburicoic acid (TRR); one component of Antrodia camphorata in vitro and in an animal model for 14 weeks. Expression levels of membrane glucose transporter type 4 (GLUT4); phospho-5'-adenosine monophosphate-activated protein kinase (AMPK)/total AMPK; and phospho-Akt/total-Akt in insulin-resistant C2C12 myotube cells were significantly decreased by palmitate; and such decrease was prevented and restored by TRR at different concentrations...
November 2, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29077951/in-ovo-feeding-of-l-arginine-alters-energy-metabolism-in-post-hatch-broilers
#14
L L Yu, T Gao, M M Zhao, P A Lv, L Zhang, J L Li, Y Jiang, F Gao, G H Zhou
This study aimed to investigate the effects of in ovo feeding (IOF) of L-arginine (Arg) on energy metabolism in post-hatch broilers. A total of 720 eggs was randomly assigned to 3 treatments: 1) non-injected control group, 2) 0.75% NaCl diluent-injected control group, and 3) 1.0% Arg solution-injected group. At 17.5 d of incubation, 0.6 mL of each solution was injected into the amniotic fluid of each egg of injected groups. After hatching, 80 male chicks were randomly assigned to each treatment group with 8 replicates per group...
October 25, 2017: Poultry Science
https://www.readbyqxmd.com/read/29028535/baicalin-and-its-metabolites-suppresses-gluconeogenesis-through-activation-of-ampk-or-akt-in-insulin-resistant-hepg-2-cells
#15
Tao Wang, Hongmei Jiang, Shijie Cao, Qian Chen, Mingyuan Cui, Zhijie Wang, Dandan Li, Jing Zhou, Tao Wang, Feng Qiu, Ning Kang
Scutellaria baicalensis Georgi (S. baicalensis), as a traditional Chinese herbal medicine, is an important component of several famous Chinese medicinal formulas for treating patients with diabetes mellitus. Baicalin (BG), a main bioactive component of S. baicalensis, has been reported to have antidiabetic effects. However, pharmacokinetic studies have indicated that BG has poor oral bioavailability. Therefore, it is hard to explain the pharmacological effects of BG in vivo. Interestingly, several reports show that BG is extensively metabolized in rats and humans...
December 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28986936/in-ovo-feeding-of-creatine-pyruvate-modulates-growth-performance-energy-reserves-and-mrna-expression-levels-of-gluconeogenesis-and-glycogenesis-enzymes-in-liver-of-embryos-and-neonatal-broilers
#16
M M Zhao, D Q Gong, T Gao, L Zhang, J L Li, P A Lv, L L Yu, F Gao, G H Zhou
The effects of in ovo feeding (IOF) of creatine pyruvate (CrPyr) on the growth performance, energy reserves and mRNA expression levels of gluconeogenesis and glycogenesis enzymes in liver of late-term embryos and neonatal broilers were investigated. After candling on 16 day of incubation, a total of 960 eggs were randomly assigned to three treatments: (i) non-injected control, (ii) saline group injected with 0.6 ml of 0.75% physiological saline and (iii) Creatine pyruvate group injected with 0.6 ml of physiological saline containing 12 mg CrPyr/egg...
October 7, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28964523/expression-of-hepatic-genes-related-to-energy-metabolism-during-the-transition-period-of-holstein-and-f1-holstein-gir-cows
#17
J G Laguna, M S Cardoso, J A Lima, R B Reis, A U Carvalho, H M Saturnino, S M R Teixeira
The aim of this study was to investigate the expression of genes encoding enzymes and other factors involved with carbohydrate and lipid metabolism in the liver of 2 genetic groups of dairy cows during the transition period. We analyzed the expression of glucose-6-phosphatase (G6PC), cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C), methylmalonyl-CoA mutase (MUT), β-hydroxybutyrate dehydrogenase-2 (BDH2), acetyl-CoA carboxylase (ACC), carnitine palmitoyltransferase-2 (CPT2), 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR), glucose transporter-2 (SLC2A2), and the transcription factor peroxisome proliferator-activated receptor α (PPARA)...
September 27, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28962167/effect-of-l-arginine-supplementation-on-the-hepatic-phosphatidylinositol-3-kinase-signaling-pathway-and-gluconeogenic-enzymes-in-early-intrauterine-growth-restricted-rats
#18
Kaiju Luo, Pingyang Chen, Suping Li, Wen Li, Mingfeng He, Tao Wang, Juncao Chen
The present study aimed to investigate the response of the phosphatidylinositol 3-kinase (PI3K) signaling pathway and gluconeogenic enzymes in intrauterine growth-restricted rats to dietary L-arginine (L-Arg) supplementation during the lactation period early in life. Pregnant Sprague-Dawley rats were randomly divided into a control group (CON), an intrauterine growth restriction group (IUGR) and an L-Arg group (LA). The pregnant rats in the CON group were fed a 21% protein diet, and those in the IUGR and LA groups were fed a 10% low protein diet, and all rats were fed a 21% protein diet after delivery...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28958473/expression-of-hypoxia-inducible-factor-1%C3%AE-and-its-correlation-with-phosphoenolpyruvate-carboxykinase-after-portal-vein-ligation-in-rats
#19
Changjun Jia, Hua Yang, Chaoliu Dai, Feng Xu, Songlin Peng, Yang Zhao, Chuang Zhao, Liang Zhao
AIMS: Portal vein ligation (PVL) has been used to effectively increase future liver remnant (FLR) in hepatectomy for treatment of liver cancer. However, the underlying molecular mechanisms have not been well characterized. The present study aimed to determine expression of hypoxia inducible factor-1alpha (HIF-1α) in response to PVL and assess the correlation of HIF-1α and phosphoenolpyruvate carboxykinase (PEPCK). MAIN METHODS: Male Sprague-Dawley rats underwent PVL and were sacrificed at different time points (12, 24, 48, 72, and 168h) after surgery...
December 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/28946872/suppression-of-adipocyte-differentiation-and-lipid-accumulation-by-stearidonic-acid-sda-in-3t3-l1-cells
#20
Yueru Li, Yinghui Rong, Lisui Bao, Ben Nie, Guang Ren, Chen Zheng, Rajesh Amin, Robert D Arnold, Ramesh B Jeganathan, Kevin W Huggins
BACKGROUND: Increased consumption of omega-3 (ω-3) fatty acids found in cold-water fish and fish oil has been reported to protect against obesity. A potential mechanism may be through reduction in adipocyte differentiation. Stearidonic acid (SDA), a plant-based ω-3 fatty acid, has been targeted as a potential surrogate for fish-based fatty acids; however, its role in adipocyte differentiation is unknown. This study was designed to evaluate the effects of SDA on adipocyte differentiation in 3T3-L1 cells...
September 25, 2017: Lipids in Health and Disease
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