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https://www.readbyqxmd.com/read/28647962/-effect-of-endoplasmic-reticulum-stress-in-trophocytes-on-the-pathogenesis-of-intrahepatic-cholestasis-of-pregnancy
#1
Y Yu, C L Zhou, T T Yu, X J Han, H Y Shi, H Z Wang, J J Shen, J He
Objective: To evaluate the effect of endoplasmic reticulum stress in trophocytes, in patients with intrahepatic cholestasis of pregnancy (ICP). Methods: Sixty-one pregnant women who were hospitalized in Women's Hospital, School of Medicine, Zhejiang University from January to December 2015 were recruited. Thirty-one women who were diagnosed as ICP were defined as the ICP group and 30 healthy pregnant women were defined as the control group. The localization and expression intensity of glucose regulated protein 78 (GRP-78) in placental tissues were detected by immunohistochemistry technique...
June 25, 2017: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/28647826/numerical-simulation-of-a-glucose-sensitive-composite-membrane-closed-loop-insulin-delivery-system
#2
Shashi Bajaj Mukherjee, Debabrata Datta, Soumyendu Raha, Debnath Pal
Closed-loop insulin delivery system works on pH modulation by gluconic acid production from glucose, which in turn allows regulation of insulin release across membrane. Typically, the concentration variation of gluconic acid can be numerically modeled by a set of non-linear, non-steady state reaction diffusion equations. Here, we report a simpler numerical approach to time and position dependent diffusivity of species using finite difference and differential quadrature (DQ) method. The results are comparable to that obtained by analytical method...
June 24, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28647528/the-linkage-between-nutrient-supply-intracellular-enzyme-abundances-and-bacterial-growth-new-evidences-from-the-central-carbon-metabolism-of-corynebacterium-glutamicum
#3
Stephan Noack, Raphael Voges, Jochem Gätgens, Wolfgang Wiechert
Corynebacterium glutamicum serves as important production host for small molecular compounds that are derived from precursor molecules of the central carbon metabolism. It is therefore a well-studied model organism of industrial biotechnology. However, a deeper understanding of the regulatory principles underlying the synthesis of central metabolic enzymes under different environmental conditions as well as its impact on cell growth is still missing. We studied enzyme abundances in C. glutamicum in response to growth on: i) one limiting carbon source by sampling chemostat and fed-batch cultivations and ii) changing carbon sources provided in excess by sampling batch cultivations...
June 21, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28647375/type-i-interferon-signalling-through-ifnar1-plays-a-deleterious-role-in-the-outcome-after-stroke
#4
Moses Zhang, Catherine E Downes, Connie H Y Wong, Kate M Brody, Pedro L Guio-Agulair, Jodee Gould, Robert Ates, Paul J Hertzog, Juliet M Taylor, Peter J Crack
Neuroinflammation contributes significantly to the pathophysiology of stroke. Here we test the hypothesis that the type I interferon receptor (IFNAR1) plays a critical role in neural injury after stroke by regulating the resultant pro-inflammatory environment. Wild-type and IFNAR1(-/-) primary murine neurons and glia were exposed to oxygen glucose deprivation (OGD) and cell viability was assessed. Transient cerebral ischemia/reperfusion injury was induced by mid-cerebral artery occlusion (MCAO) in wild-type and IFNAR1(-/-) and IFNAR2(-/-) mice in vivo, and infarct size, and molecular parameters measured...
June 21, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28647373/salusin-%C3%AE-mediates-high-glucose-induced-endothelial-injury-via-disruption-of-ampk-signaling-pathway
#5
Xuexue Zhu, Yuetao Zhou, Weiwei Cai, Haijian Sun, Liying Qiu
The dysregulated proliferation, migration, apoptosis and angiogenesis of endothelial cells are involved in diabetic endothelial dysfunction. The circulating salusin-β levels were increased in diabetic patients, and salusin-β contributes to diabetic cardiomyopathy in rats. However, the roles of salusin-β in diabetes mellitus-induced endothelial dysfunction are not fully understood. Herein, we demonstrated the increased expressions of salusin-β in human umbilical vein endothelial cells (HUVECs) cultured in HG medium...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647324/ampk-as-a-therapeutic-target-for-treating-metabolic-diseases
#6
REVIEW
Emily A Day, Rebecca J Ford, Gregory R Steinberg
The AMP-activated protein kinase (AMPK) is a central regulator of multiple metabolic pathways and may have therapeutic importance for treating obesity, insulin resistance, type 2 diabetes (T2D), non-alcoholic fatty liver disease (NAFLD), and cardiovascular disease (CVD). Given the ubiquitous expression of AMPK, it has been a challenge to evaluate which tissue types may be most beneficially poised for mediating the positive metabolic effects of AMPK-centered treatments. In this review we evaluate the metabolic phenotypes of transgenic mouse models in which AMPK expression and function have been manipulated, and the impact this has on controlling lipid metabolism, glucose homeostasis, and inflammation...
June 21, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28647274/sonic-hedgehog-pathway-suppression-and-reactivation-accelerates-differentiation-of-rat-adipose-derived-mesenchymal-stromal-cells-toward-insulin-producing-cells
#7
Dian Dayer, Mahmoud Hashemi Tabar, Eskandar Moghimipour, Mohammad Reza Tabandeh, Ata A Ghadiri, Elham Allah Bakhshi, Mahmoud Orazizadeh, Mohammad Ali Ghafari
BACKGROUND AIMS: Sonic hedgehog (Shh) is an intercellular signaling molecule that regulates pancreas development in mammals. Manipulation of Shh signaling pathway can be used as reliable approach to improve the generation of functional insulin-producing cells (IPCs) from mesenchymal stromal cells (MSCs). METHODS: In the present study, a novel differentiation protocol was used to produce IPCs from adipose tissue-derived MSCs (ATDMSCs) based on sequential inhibition and reactivation of Shh pathway...
June 21, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28647273/the-effect-of-mir-30d-on-apoptosis-and-autophagy-in-cultured-astrocytes-under-oxygen-glucose-deprivation
#8
Fengyan Zhao, Yi Qu, Huiqing Wang, Lan Huang, Jianghu Zhu, Shiping Li, Yu Tong, Li Zhang, Jiao Li, Dezhi Mu
MiR-30d has been demonstrated to regulate autophagy in human cancer cells. However, the role of miR-30d in astrocytes exposed to hypoxia-ischemia is not clear. In this study, we established model of oxygen and glucose deprivation (OGD) with rat primary astrocytes and evaluated the role of miR-30d in the cross-talk between autophagy and apoptosis in astrocytes after OGD. We found that miR-30d inhibited Beclin1 expression in astrocytes. Inhibition of miR-30d by antagomir significantly increased cell autophagy but decreased cell apoptosis in astrocytes exposed to OGD...
June 21, 2017: Brain Research
https://www.readbyqxmd.com/read/28646706/corn-silk-maysin-ameliorates-obesity-in-vitro-and-in-vivo-via-suppression-of-lipogenesis-differentiation-and-function-of-adipocytes
#9
Chang Won Lee, Jeong Yeon Seo, Sun-Lim Kim, Jisun Lee, Ji Won Choi, Yong Il Park
Present study was aimed to investigate the potential anti-obesity effects of maysin, a major flavonoid of corn silk, in vitro and in vivo using 3T3-L1 preadipocyte cells and C57BL/6 mice. Maysin decreased the levels of intracellular lipid droplets and triglycerides (TG), and down-regulated the protein expression levels of C/EBP-β, C/EBP-α, PPAR-γ, and aP2 in 3T3-L1 preadipocyte cells, suggesting that maysin inhibits lipid accumulation and adipocyte differentiation. In addition, maysin was shown to induce the apoptotic cell death in 3T3-L1 preadipocyte cells via activation of caspase cascades and mitochondrial dysfunction, which may ultimately lead to reduction of adipose tissue mass...
June 21, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28646681/proteomic-analysis-of-developing-wheat-grains-infected-by-powdery-mildew-blumeria-graminis-f-sp-tritici
#10
Jie Li, Xi-Wen Yang, Yong-Chun Li, Ji-Shan Niu, De-Xian He
Blumeria graminis f.sp. tritici (Bgt) infection greatly interferes with the normal source-sink relationships and always causes tremendous loss of yield and quality in wheat. To better understand the impact of this pathogen on grain development, proteome characterization during grain development in susceptible wheat cultivar Xinong 979 infected by powdery mildew was investigated by 2-DE and tandem MALDI-TOF/TOF-MS. Identification of 111 differentially expressed protein spots representing 85 unique proteins and six expression patterns showed a chronological description of wheat grain formation...
June 10, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28646353/creb1-regulates-glucose-transport-of-glioma-cell-line-u87-by-targeting-glut1
#11
Jiaying Chen, Can Zhang, Yang Mi, Fuxue Chen, Dongshu Du
Glioma is stemmed from the glial cells in the brain, which is accounted for about 45% of all intracranial tumors. The characteristic of glioma is invasive growth, as well as there is no obvious boundary between normal brain tissue and glioma tissue, so it is difficult to resect completely with worst prognosis. The metabolism of glioma is following the Warburg effect. Previous researches have shown that GLUT1, as a glucose transporter carrier, affected the Warburg effect, but the molecular mechanism is not very clear...
June 23, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28646159/yvck-a-protein-required-for-cell-wall-integrity-and-optimal-carbon-source-utilization-binds-uridine-diphosphate-sugars
#12
Elodie Foulquier, Anne Galinier
In Bacillus subtilis, Listeria monocytogenes and in two Mycobacteria, it was previously shown that yvcK is a gene required for normal cell shape, for optimal carbon source utilization and for virulence of pathogenic bacteria. Here we report that the B. subtilis protein YvcK binds to Uridine diphosphate-sugars like Uridine diphosphate-Glucose (UDP-Glc) and Uridine diphosphate-N-acetylglucosamine (UDP-GlcNAc) in vitro. Using the crystal structure of Bacillus halodurans YvcK, we identified residues involved in this interaction...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646105/the-glycolytic-enzyme-phosphofructokinase-1-assembles-into-filaments
#13
Bradley A Webb, Anne M Dosey, Torsten Wittmann, Justin M Kollman, Diane L Barber
Despite abundant knowledge of the regulation and biochemistry of glycolytic enzymes, we have limited understanding on how they are spatially organized in the cell. Emerging evidence indicates that nonglycolytic metabolic enzymes regulating diverse pathways can assemble into polymers. We now show tetramer- and substrate-dependent filament assembly by phosphofructokinase-1 (PFK1), which is considered the "gatekeeper" of glycolysis because it catalyzes the step committing glucose to breakdown. Recombinant liver PFK1 (PFKL) isoform, but not platelet PFK1 (PFKP) or muscle PFK1 (PFKM) isoforms, assembles into filaments...
June 23, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28646079/identification-of-flavin-containing-monooxygenase-5-fmo5-as-a-regulator-of-glucose-homeostasis-and-a-potential-sensor-of-gut-bacteria
#14
Flora Scott, Sandra G Gonzalez Malagon, Brett A O'Brien, Diede Fennema, Sunil Veeravalli, Clarissa R Coveney, Ian R Phillips, Elizabeth A Shephard
We have previously identified flavin-containing monooxygenase 5 (FMO5) as a regulator of metabolic ageing. The aim of the present study was to investigate the role of FMO5 in glucose homeostasis and the impact of diet and gut flora on the phenotype of mice in which the Fmo5 gene has been disrupted (Fmo5(-/-) mice). In comparison with wild-type (WT) counterparts, Fmo5(-/-) mice are resistant to age-related changes in glucose homeostasis and maintain the higher glucose tolerance and insulin sensitivity characteristic of young animals...
June 23, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28646042/on-the-role-il-4-il-13-heteroreceptor-plays-in-regulation-of-type-1-diabetes
#15
Tobechukwu K Ukah, Alexis N Cattin-Roy, Weirong Chen, Mindy M Miller, Subhasis Barik, Habib Zaghouani
Type 1 diabetes (T1D) manifests when the insulin-producing pancreatic β cells are destroyed as a consequence of an inflammatory process initiated by lymphocytes of the immune system. The NOD mouse develops T1D spontaneously and serves as an animal model for human T1D. The IL-4Rα/IL-13Rα1 heteroreceptor (HR) serves both IL-4 and IL-13 cytokines, which are believed to function as anti-inflammatory cytokines in T1D. However, whether the HR provides a responsive element to environmental (i.e., physiologic) IL-4/IL-13 in the regulation of peripheral tolerance and the development of T1D has yet to be defined...
June 23, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28645566/using-straw-hydrolysate-to-cultivate-chlorella-pyrenoidosa-for-high-value-biomass-production-and-the-nitrogen-regulation-for-biomass-composition
#16
Tian-Yuan Zhang, Xiao-Xiong Wang, Yin-Hu Wu, Jing-Han Wang, Victor M Deantes-Espinosa, Lin-Lan Zhuang, Hong-Ying Hu, Guang-Xue Wu
Heterotrophic cultivation of Chlorella pyrenoidosa based on straw substrate was proposed as a promising approach in this research. The straw pre-treated by ammonium sulfite method was enzymatically hydrolyzed for medium preparation. The highest intrinsic growth rate of C. pyrenoidosa reached to 0.097h(-1) in hydrolysate medium, which was quicker than that in glucose medium. Rising nitrogen concentration could significantly increase protein content and decrease lipid content in biomass, meanwhile fatty acids composition kept stable...
May 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28645541/comparison-of-the-effect-by-which-gastric-plication-and-sleeve-gastrectomy-procedures-alter-metabolic-and-physical-parameters-in-an-obese-type-2-diabetes-rodent-model
#17
Min Ye, Renhong Huang, Zhijun Min, Peng Zhang, Tingfeng Wang, Bo Yu
BACKGROUND: Gastric plication (GP) and sleeve gastrectomy (SG) are 2 restrictive bariatric surgeries that are associated with weight loss and health improvement in patients with obesity. However, differences in how these procedures exert their effects have not been systematically evaluated and compared between techniques. OBJECTIVES: To investigate the effectiveness of GP and SG surgeries for obese patients with type 2 diabetes based on evaluation of energy metabolism, hormone metabolism, and gastrointestinal dynamics...
May 11, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28645527/inhibition-of-17beta-hydroxysteroid-dehydrogenase-type-7-modulates-breast-cancer-protein-profile-and-enhances-apoptosis-by-down-regulating-grp78
#18
Xiao-Qiang Wang, Juliette A Aka, Tang Li, Dan Xu, Charles J Doillon, Sheng-Xiang Lin
17beta-hydroxysteroid dehydrogenase type 7 (17β-HSD7) promotes breast cancer cell growth via dual-catalytic activity by modulating estradiol and DHT. Here, we clarified the expression pattern of 17β-HSD7 in postmenopausal luminal A type breast cancer with The Cancer Genome Atlas (TCGA) cohort. The impact of 17β-HSD7 inhibition on the proteome of MCF-7 cells was investigated and on cell apoptosis was revealed. MCF-7 cells were treated with an efficient inhibitor of 17β-HSD7 or with vehicle, and a differential proteomics study was performed using two-dimensional (2D) gel electrophoresis followed by mass spectrometry and ingenuity pathway analysis (IPA)...
June 20, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28645331/circadian-clock-gene-polymorphisms-in-relation-to-sleep-patterns-and-obesity-in-african-americans-findings-from-the-jackson-heart-study
#19
Pia Riestra, Samson Y Gebreab, Ruihua Xu, Rumana J Khan, Amadou Gaye, Adolfo Correa, Nancy Min, Mario Sims, Sharon K Davis
BACKGROUND: Circadian rhythms regulate key biological processes and the dysregulation of the intrinsic clock mechanism affects sleep patterns and obesity onset. The CLOCK (circadian locomotor output cycles protein kaput) gene encodes a core transcription factor of the molecular circadian clock influencing diverse metabolic pathways, including glucose and lipid homeostasis. The primary objective of this study was to evaluate the associations between CLOCK single nucleotide polymorphisms (SNPs) and body mass index (BMI)...
June 23, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28645264/molecular-cloning-structure-phylogeny-and-expression-analysis-of-the-invertase-gene-family-in-sugarcane
#20
Liming Wang, Yuexia Zheng, Shihui Ding, Qing Zhang, Youqiang Chen, Jisen Zhang
BACKGROUND: Invertases (INVs) are key enzymes regulating sucrose metabolism and are here revealed to be involved in responses to environmental stress in plants. To date, individual members of the invertase gene family and their expression patterns are unknown in sugarcane due to its complex genome despite their significance in sucrose metabolism. RESULTS: In this study, based on comparative genomics, eleven cDNA and twelve DNA sequences belonging to 14 non-redundant members of the invertase gene family were successfully cloned from sugarcane...
June 23, 2017: BMC Plant Biology
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