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Gluconeogenesis

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https://www.readbyqxmd.com/read/28813521/correction-liver-amp-activated-protein-kinase-is-unnecessary-for-gluconeogenesis-but-protects-energy-state-during-nutrient-deprivation
#1
Clinton M Hasenour, Martha L Wall, D Emerson Ridley, Freyja D James, Curtis C Hughey, E Patrick Donahue, Benoit Viollet, Marc Foretz, Jamey D Young, David H Wasserman
[This corrects the article DOI: 10.1371/journal.pone.0170382.].
2017: PloS One
https://www.readbyqxmd.com/read/28813453/metabolomics-reveals-that-vine-tea-ampelopsis-grossedentata-prevents-high-fat-diet-induced-metabolism-disorder-by-improving-glucose-homeostasis-in-rats
#2
Wenting Wan, Baoping Jiang, Le Sun, Lijia Xu, Peigen Xiao
BACKGROUND: Vine tea (VT), derived from Ampelopsis grossedentata (Hand.-Mazz.) W.T. Wang, is an alternative tea that has been consumed widely in south China for hundreds of years. It has been shown that drinking VT on a daily basis improves hyperlipidemia and hyperglycemia. However, little is known about the preventive functions of VT for metabolic dysregulation and the potential pathological mechanisms involved. This paper elucidates the preventive effects of VT on the dysregulation of lipid and glucose metabolism using rats maintained on a high-fat-diet (HFD) in an attempt to explain the potential mechanisms involved...
2017: PloS One
https://www.readbyqxmd.com/read/28811650/diet-induced-obesity-leads-to-metabolic-dysregulation-in-offspring-via-endoplasmic-reticulum-stress-in-a-sex-specific-manner
#3
J H Park, Y Yoo, M Cho, J Lim, A M Lindroth, Y J Park
BACKGROUND/OBJECTIVES: Exposure to metabolic stress has been suggested to influence the susceptibility to metabolic disorders in offspring according to epidemiological and animal studies. Nevertheless, molecular mechanisms remain unclear. We investigated impacts of diet-induced paternal obesity on metabolic phenotypes in offspring and its underlying molecular mechanism. SUBJECTS/METHODS: Male founder mice (F0), fed with control diet (CD) or high fat diet (HFD), were mated with CD-fed females...
August 16, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28808102/recruitment-of-pre-existing-networks-during-the-evolution-of-c4-photosynthesis
#4
REVIEW
Ivan Reyna-Llorens, Julian M Hibberd
During C4 photosynthesis, CO2 is concentrated around the enzyme RuBisCO. The net effect is to reduce photorespiration while increasing water and nitrogen use efficiencies. Species that use C4 photosynthesis have evolved independently from their C3 ancestors on more than 60 occasions. Along with mimicry and the camera-like eye, the C4 pathway therefore represents a remarkable example of the repeated evolution of a highly complex trait. In this review, we provide evidence that the polyphyletic evolution of C4 photosynthesis is built upon pre-existing metabolic and genetic networks...
September 26, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28805685/re-adaption-on-earth-after-spaceflights-affects-the-mouse-liver-proteome
#5
Viktoria Anselm, Svetlana Novikova, Victor Zgoda
Harsh environmental conditions including microgravity and radiation during prolonged spaceflights are known to alter hepatic metabolism. Our studies have focused on the analysis of possible changes in metabolic pathways in the livers of mice from spaceflight project "Bion-M 1". Mice experienced 30 days of spaceflight with and without an additional re-adaption period of seven days compared to control mice on Earth. To investigate mice livers we have performed proteomic profiling utilizing shotgun mass spectrometry followed by label-free quantification...
August 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28804981/lipopolysaccharide-inhibits-hepatic-gluconeogenesis-in-rats-the-role-of-immune-cells
#6
Hiroshi Tanaka, Yoshikazu Nishikawa, Toru Fukushima, Ataru Taniguchi, Yoshihito Fujita, Kinsuke Tsuda, Nobuya Inagaki, Masaya Hosokawa
AIMS/INTRODUCTION: Bacterial septicemia has diverse clinical symptoms including severe hypoglycemia. However, sepsis-induced hypoglycemia has not yet been examined in detail. The aim of the present study is to investigate the mechanisms underlying hypoglycemia in sepsis. MATERIALS AND METHODS: We induced endotoxin shock in rats using lipopolysaccharide (LPS). After an intraperitoneal injection of LPS, we measured gluconeogenesis using the pyruvate tolerance test (PTT)...
August 14, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28803361/toxoplasma-gondii-and-neospora-caninum-induce-different-host-cell-responses-at-proteome-wide-phosphorylation-events-a-step-forward-for-uncovering-the-biological-differences-between-these-closely-related-parasites
#7
Mariwan M M Al-Bajalan, Dong Xia, Stuart Armstrong, Nadine Randle, Jonathan M Wastling
Toxoplasma gondii and Neospora caninum are closely related intracellular protozoan parasites and tissue cyst-forming Coccidia of the phylum Apicomplexa. There are remarkable similarities between the morphology, genomes and transcriptomes of both parasites. Toxoplasma is zoonotic, with a wide host range and is mainly transmitted horizontally between its definitive host, the cat, and its intermediate hosts. Neospora causes disease within a narrow host range and with reduced virulence potential to the hosts. The dog is the definitive host of Neospora and its epidemiology in cattle mainly depends on vertical transmission...
August 12, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28801592/dietary-arginine-affects-the-insulin-signaling-pathway-glucose-metabolism-and-lipogenesis-in-juvenile-blunt-snout-bream-megalobrama-amblycephala
#8
Hualiang Liang, Habte-Michael Habte-Tsion, Xianping Ge, Mingchun Ren, Jun Xie, Linghong Miao, Qunlan Zhou, Yan Lin, Wenjing Pan
This study evaluated the mechanisms governing insulin resistance, glucose metabolism and lipogenesis in juvenile fish fed with graded levels of dietary arginine. The results showed that, compared with the control group (0.87%), 2.31% dietary arginine level resulted in the upregulation of the relative gene expression of IRS-1, PI3K and Akt in the insulin signaling pathway, while 2.70% dietary arginine level led to inhibition of these genes. 1.62% dietary arginine level upregulated glycolysis by increasing GK mRNA level; 2...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801239/salsalate-activates-skeletal-muscle-thermogenesis-and-protects-mice-from-high-fat-diet-induced-metabolic-dysfunction
#9
Li Nie, Xin-Lu Yuan, Ke-Tao Jiang, Yu-Hui Jiang, Jin Yuan, Lan Luo, Shi-Wei Cui, Cheng Sun
Salsalate plays beneficial roles for ameliorating hyperglycemia and dyslipidemia in type 2 diabetes patients, but the underlying mechanisms are still poorly understood. In this study, by administering salsalate to mice fed with high fat diet and examining how salsalate rectifies metabolic dysfunction in these obese mice, we found that salsalate stimulated body temperature and attenuated body weight gain without affecting food intake. Our results showed that salsalate application decreased lipid accumulation in liver and epididymal white adipose tissue (eWAT), inhibited hepatic gluconeogenesis and improved insulin signaling transduction in eWAT...
August 4, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28801230/a-mitochondrial-proteomics-view-of-complex-i-deficiency-in-candida-albicans
#10
Xiaodong She, Pengyi Zhang, Ying Gao, Lulu Zhang, Qiong Wang, Hui Chen, Richard Calderone, Weida Liu, Dongmei Li
Proteomic analyses were carried out on isolated mitochondrial samples of C. albicans from gene-deleted mutants (nuo1Δ, nuo2Δ and goa1Δ) as well as the parental strain in order to better understand the contribution of these three fungal-specific mitochondrial ETC complex I (CI) subunits to cellular activities. Herein, we identify 2333 putative proteins from four strains, in which a total of 663 proteins (28.5%) are putatively located in mitochondria. Comparison of protein abundances between mutants and the parental strain reveal 146 differentially-expressed proteins, of which 78 are decreased and 68 are increased in at least one mutant...
August 8, 2017: Mitochondrion
https://www.readbyqxmd.com/read/28799789/naphtho-1-2-b-furan-4-5-dione-is-a-potent-anti-mrsa-agent-against-planktonic-biofilm-and-intracellular-bacteria
#11
Shih-Chun Yang, Feng-Lin Yen, Pei-Wen Wang, Ibrahim A Aljuffali, Yi-Han Weng, Chih-Hua Tseng, Jia-You Fang
AIM: Naphtho[1,2-b]furan-4,5-dione (N12D) and naphtho[2,3-b]furan-4,9-dione (N23D) are furanonaphthoquinone derivatives from natural resources. We examined the antimicrobial activity of N12D and N23D against drug-resistant Staphylococcus aureus. MATERIALS & METHODS: Minimum inhibitory concentration, minimum bactericidal concentration, bacterial viability and agar diffusion assay were conducted against methicillin-resistant S. aureus (MRSA) and clinical isolates of vancomycin-resistant S...
August 11, 2017: Future Microbiology
https://www.readbyqxmd.com/read/28790135/ddb1-mediated-cry1-degradation-promotes-foxo1-driven-gluconeogenesis-in-liver
#12
Xin Tong, Deqiang Zhang, Nicholas Charney, Ethan Jin, Kyle Vandommelon, Kenneth Stamper, Neil Gupta, Johnny Saldate, Lei Yin
Targeted protein degradation through ubiquitination is an important step in the regulation of glucose metabolism. Here we present evidence that the DDB1-CUL4A ubiquitin E3 ligase functions as a novel metabolic regulator that promotes FOXO1-driven hepatic gluconeogenesis. In vivo, hepatocyte-specific Ddb1 deletion leads to impaired hepatic gluconeogenesis in the mouse liver but protects mice from high-fat diet (HFD)-induced hyperglycemia. Lack of Ddb1 downregulates FOXO1 protein expression and impairs FOXO1-driven gluconeogenic response...
August 8, 2017: Diabetes
https://www.readbyqxmd.com/read/28782595/dhea-supplementation-to-dexamethasone-treated-rabbits-alleviates-oxidative-stress-in-kidney-cortex-and-attenuates-albuminuria
#13
Anna Kiersztan, Nina Trojan, Aleksandra Tempes, Paweł Nalepa, Joanna Sitek, Katarzyna Winiarska, Michał Usarek
Our recent study has shown that dehydroepiandrosterone (DHEA) administered to rabbits partially ameliorated several dexamethasone (dexP) effects on hepatic and renal gluconeogenesis, insulin resistance and plasma lipid disorders. In the current investigation, we present the data on DHEA protective action against dexP-induced oxidative stress and albuminuria in rabbits. Four groups of adult male rabbits were used in the in vivo experiment: (1) control, (2) dexP-treated, (3) DHEA-treated and (4) both dexP- and DHEA-treated...
August 4, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28781146/the-impact-of-foxo-1-to-cardiac-pathology-in-diabetes-mellitus-and-diabetes-related-metabolic-abnormalities
#14
Dimitry A Chistiakov, Alexander N Orekhov, Yuri V Bobryshev
Diabetic heart pathology has a serious social impact due to high prevalence worldwide and significant mortality/invalidation of diabetic patients suffered from cardiomyopathy. The pathogenesis of diabetic and diabetes-related cardiomyopathy is associated with progressive loss and impairment of cardiac function due to adverse effects of metabolic, prooxidant, proinflammatory, and pro-apoptotic stress factors. In the adult heart, the transcriptional factor forkhead box-1 (FOXO-1) is involved in maintaining cardiomyocytes in the homeostatic state and induction of their adaptation to metabolic and pro-oxidant stress stimuli...
August 2, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28778020/long-term-effect-of-dietary-overload-lithium-on-the-glucose-metabolism-in-broiler-chickens
#15
Shiping Bai, Shuqin Pan, Keying Zhang, Xuemei Ding, Jianping Wang, Qiufeng Zeng, Yue Xuan, Zuowei Su
Lithium, like insulin, activates glycogen synthase and stimulates glucose transport in rat adipocytes. To investigate the effect of dietary overload lithium on glucose metabolism in broiler chickens, one-day-old chicks were fed a basal diet supplemented with 0 (control) or 100mg lithium/kg (overload lithium) for 35days. Compared to controls, glucose disappearance rates were lower (p=0.035) 15-120min after glucose gavage, and blood glucose concentrations were lower (p=0.038) 30min after insulin injection in overload lithium broilers...
July 22, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28771929/comparative-itraq-based-quantitative-proteomic-analysis-of-pelteobagrus-vachelli-liver-against-acute-hypoxia-implications-in-metabolic-responses
#16
Guosong Zhang, Jiajia Zhang, Xin Wen, Cheng Zhao, Hongye Zhang, Xinru Li, Shaowu Yin
More and more frequently these days, aquatic ecosystems are being stressed by nutrient enrichment, pollutants, and global warming, leading to a serious depletion in oxygen concentrations. Although a sudden, significant lack of oxygen will result in mortality, fishes can have an acute behaviour (e.g., an increase in breathing rate, reduction in swimming frequency) and physiology responses (e.g., increase in oxygen delivery, and reduction in oxygen consumption) to hypoxia, which allows them to maintain normal physical activity...
August 3, 2017: Proteomics
https://www.readbyqxmd.com/read/28768809/2-hydroxyisobutyrylation-on-histone-h4k8-is-regulated-by-glucose-homeostasis-in-saccharomyces-cerevisiae
#17
Jing Huang, Zhouqing Luo, Wantao Ying, Qichen Cao, He Huang, Junkai Dong, Qingyu Wu, Yingming Zhao, Xiaohong Qian, Junbiao Dai
New types of modifications of histones keep emerging. Recently, histone H4K8 2-hydroxyisobutyrylation (H4K8hib) was identified as an evolutionarily conserved modification. However, how this modification is regulated within a cell is still elusive, and the enzymes adding and removing 2-hydroxyisobutyrylation have not been found. Here, we report that the amount of H4K8hib fluctuates in response to the availability of carbon source in Saccharomyces cerevisiae and that low-glucose conditions lead to diminished modification...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28765812/role-of-ampd2-in-impaired-glucose-tolerance-induced-by-high-fructose-diet
#18
Athanasius Wrin Hudoyo, Tetsuaki Hirase, Andreas Tandelillin, Masahiko Honda, Manabu Shirai, Jidong Cheng, Hiroko Morisaki, Takayuki Morisaki
A high intake of products containing fructose is known to mediate insulin resistance. In the liver, AMPD2, an isoform of AMPD, has important glucose metabolic homeostasis functions including maintenance of AMP-activated protein kinase (AMPK). We speculated that AMPD2 induces impaired glucose tolerance in individuals who consume a high-fructose diet. We gave either a normal-chow (NCD) or high-fructose (HFrD) diet for 40 days to 8-week-old male wild-type (WT) and Ampd2 -/- homozygote (A2 -/-) C57BL/6 mice...
December 2017: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/28763759/metabolomics-analysis-of-danggui-sini-decoction-on-treatment-of-collagen-induced-arthritis-in-rats
#19
Bang Cheng, Hua Zheng, Fang Wu, Jinxia Wu, Xuwen Liu, Chaoling Tang, Shiyin Lu, Zhaoni Chen, Fangming Song, Junxiang Ruan, Hongye Zhang, Hui Song, Wei Liu, Hongwei Guo, Yonghong Liang, Zhiheng Su
Rheumatoid arthritis (RA) is a chronic autoimmune disorder characterized by persistent joint inflammation leading to bone and cartilage damage and even disability. However, the pathogenesis of RA is multi-factorial and to a large degree, remains unknown. Danggui Sini decoction (DSD), a traditional Chinese medicine (TCM) formula, has been widely used as a remedy for rheumatoid arthritis (RA) in recent years. In our study, (1)H-nuclear magnetic resonance ((1)H NMR) based metabolomics analysis of 7 potential biomarkers, including taurine (1), urea (2), betaine (3), pyruvate (4), hippurate (5), succinate (6) and acetone (7) was performed to investigate the progression of RA and assess the efficacy of DSD in collagen-induced arthritis (CIA) rats...
July 24, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28760849/stability-of-proteins-out-of-service-the-gapb-case-of-bacillus-subtilis
#20
Ulf Gerth, Eleonora Krieger, Daniela Zühlke, Alexander Reder, Uwe Völker, Michael Hecker
Bacillus subtilis possesses two glyceraldehyde-3-phosphate dehydrogenases with opposite roles, the glycolytic NAD-dependent GapA and the NADP-dependent GapB enzyme, which is exclusively required during gluconeogenesis but not active under conditions promoting glycolysis. We propose, that proteins no longer needed will be recognized and proteolyzed by Clp proteases and thereby recycled. To test this postulation, we analyzed the stability of the glycolytic enzyme GapA and the gluconeogenetic enzyme GapB in the presence and absence of glucose...
July 31, 2017: Journal of Bacteriology
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