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https://www.readbyqxmd.com/read/28325730/glucose-oxidation-positively-regulates-glucose-uptake-and-improves-cardiac-function-recovery-after-myocardial-reperfusion
#1
Tingting Li, Jie Xu, Xinghua Qin, Zuoxu Hou, Yongzheng Guo, Zhenhua Liu, Jianjiang Wu, Hong Zheng, Xing Zhang, Feng Gao
Myocardial reperfusion decreases glucose oxidation and uncouples glucose oxidation from glycolysis. Therapies that increase glucose oxidation lessen myocardial ischemia/reperfusion injury. However, the regulation of glucose uptake during reperfusion remains poorly understood. Here we found that glucose uptake was remarkably diminished in myocardium following reperfusion in Sprague-Dawley rats as detected by 18F-labeled and fluorescent-labeled glucose analogs, even though GLUT1 was upregulated by 3 folds and GLUT4 translocation remained unchanged compared with those of sham rats...
March 21, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324109/sex-specific-life-course-changes-in-the-neuro-metabolic-phenotype-of-glut3-null-heterozygous-mice-ketogenic-diet-ameliorates-electroencephalographic-seizures-and-improves-sociability
#2
Yun Dai, Yuanzi Zhao, Masatoshi Tomi, Bo-Chul Shin, Shanthie Thamotharan, Andrey Mazarati, Raman Sankar, Elizabeth A Wang, Carlos Cepeda, Michael S Levine, Jingjing Zhang, Andrew Frew, Jeffry R Alger, Peter Clark, Monica Sondhi, Sudatip Kositamongkol, Leah Leibovitch, Sherin U Devaskar
We tested the hypothesis that exposure of glut3+/- mice to a ketogenic diet ameliorates autism-like features which includes aberrant behavior and electrographic seizures. We first investigated the life course sex-specific changes in basal plasma-CSF-brain metabolic profile, brain glucose transport/uptake, glucose and monocarboxylate transporter proteins, and ATP in the presence or absence of systemic insulin administration. Glut3+/- male but not female mice (5m of age) displayed reduced CSF glucose/lactate concentrations with no change in brain Glut1, Mct2, glucose uptake or ATP...
January 24, 2017: Endocrinology
https://www.readbyqxmd.com/read/28322926/caffeine-inhibition-of-glut1-is-dependent-on-the-activation-state-of-the-transporter
#3
Leesha K Gunnink, Brianna M Busscher, Jeremy A Wodarek, Kylee A Rosette, Lauren E Strohbehn, Brendan D Looyenga, Larry L Louters
Caffeine has been shown to be a robust uncompetitive inhibitor of glucose uptake in erythrocytes. It preferentially binds to the nucleotide-binding site on GLUT1 in its tetrameric form and mimics the inhibitory action of ATP. Here we demonstrate that caffeine is also a dose-dependent, uncompetitive inhibitor of 2-deoxyglucose (2DG) uptake in L929 fibroblasts. The inhibitory effect on 2DG uptake in these cells was reversible with a rapid onset and was additive to the competitive inhibitory effects of glucose itself, confirming that caffeine does not interfere with glucose binding...
March 17, 2017: Biochimie
https://www.readbyqxmd.com/read/28319810/inhibitors-of-glut-slc2a-enhance-the-action-of-bcnu-and-temozolomide-against-high-grade-gliomas
#4
Alberto Azzalin, Giulia Nato, Elena Parmigiani, Francesca Garello, Annalisa Buffo, Lorenzo Magrassi
Glucose transport across glioblastoma membranes plays a crucial role in maintaining the enhanced glycolysis typical of high-grade gliomas and glioblastoma. We tested the ability of two inhibitors of the glucose transporters GLUT/SLC2A superfamily, indinavir (IDV) and ritonavir (RTV), and of one inhibitor of the Na/glucose antiporter type 2 (SGLT2/SLC5A2) superfamily, phlorizin (PHZ), in decreasing glucose consumption and cell proliferation of human and murine glioblastoma cells. We found in vitro that RTV, active on at least three different GLUT/SLC2A transporters, was more effective than IDV, a specific inhibitor of GLUT4/SLC2A4, both in decreasing glucose consumption and lactate production and in inhibiting growth of U87MG and Hu197 human glioblastoma cell lines and primary cultures of human glioblastoma...
March 17, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28295307/high-expression-of-insulin-receptor-on-tumor-associated-blood-vessels-in-invasive-bladder-cancer-predicts-poor-overall-and-progression-free-survival
#5
Filip Roudnicky, Lothar C Dieterich, Cedric Poyet, Lorenz Buser, Peter Wild, Dave Tang, Peter Camenzind, Chien Hsien Ho, Vivianne I Otto, Michael Detmar
Bladder cancer is a frequently recurring disease with a very poor prognosis when progressed to invasive stages, and tumor-associated blood vessels play a crucial role in this process. In order to identify novel biomarkers associated with progression, we isolated blood vascular endothelial cells (BECs) from human invasive bladder cancers and matched normal bladder tissue, and found that tumor-associated BECs greatly upregulated the expression of insulin receptor (INSR). High expression of INSR on BECs of invasive bladder cancers was significantly associated with shorter progression-free and overall survival...
March 14, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28292469/down-regulation-of-the-placental-bcrp-abcg2-transporter-in-response-to-hypoxia-signaling
#6
Lissa N Francois, Ludwik Gorczyca, Jianyao Du, Kristin M Bircsak, Elizabeth Yen, Xia Wen, Mei-Juan Tu, Ai-Ming Yu, Nicholas P Illsley, Stacy Zamudio, Lauren M Aleksunes
INTRODUCTION: The BCRP/ABCG2 efflux transporter protects the developing fetus by limiting the transplacental transfer of drugs and chemicals and prevents the apoptosis of trophoblasts. The purpose of this study was to determine whether hypoxia-related signaling alters placental BCRP expression and function in vitro and in human pregnancies. METHODS: Human BeWo choriocarcinoma cells were treated with the hypoxia mimetic, cobalt chloride (CoCl2), or 3% oxygen for 24-48 h...
March 2017: Placenta
https://www.readbyqxmd.com/read/28283030/impaired-osteogenesis-of-t1dm-bone-marrow-derived-stromal-cells-and-periosteum-derived-cells-and-their-differential-in-vitro-responses-to-growth-factor-rescue
#7
Tera M Filion, Jordan D Skelly, Henry Huang, Dale L Greiner, David C Ayers, Jie Song
BACKGROUND: Poor bone quality, increased fracture risks, and impaired bone healing are orthopedic comorbidities of type 1 diabetes (T1DM). Standard osteogenic growth factor treatments are inadequate in fully rescuing retarded healing of traumatic T1DM long bone injuries where both periosteal and bone marrow niches are disrupted. We test the hypotheses that osteogenesis of bone marrow-derived stromal cells (BMSCs) and periosteum-derived cells (PDCs), two critical skeletal progenitors in long bone healing, are both impaired in T1DM and that they respond differentially to osteogenic bone morphogenetic proteins (BMPs) and/or insulin-like growth factor-1 (IGF-1) rescue...
March 11, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28281318/intracranial-myxoid-mesenchymal-tumors-with-ewsr1-creb-family-gene-fusions-myxoid-variant-of-angiomatoid-fibrous-histiocytoma-or-novel-entity
#8
Tejus A Bale, Angelica Oviedo, Harry Kozakewich, Caterina Giannini, Phani K Davineni, Keith Ligon, Sanda Alexandrescu
BACKGROUND: Intracranial myxoid mesenchymal tumor harboring EWSR1 fusions with CREB family of genes was recently described, and it resembles the myxoid variant of angiomatoid fibrous histiocytoma. We present 3 pediatric patients with intracranial EWSR1-rearranged myxoid mesenchymal neoplasm and provide a molecular genetic characterization of these tumors. METHODS: Clinical histories and imaging results were reviewed. Histology, immunohistochemistry, EWSR1, FUS, NR4A3 fluorescence in situ hybridization (FISH), and next generation sequencing (NGS) were performed...
March 9, 2017: Brain Pathology
https://www.readbyqxmd.com/read/28279980/glucose-transporter-4-glut4-is-not-necessary-for-overload-induced-glucose-uptake-or-hypertrophic-growth-in-mouse-skeletal-muscle
#9
Shawna L McMillin, Denise L Schmidt, Barbara B Kahn, Carol A Witczak
Glucose transporter 4 (GLUT4) is necessary for acute insulin- and contraction-induced skeletal muscle glucose uptake, but its role in chronic muscle loading (overload)-induced glucose uptake is unknown. Our goal was to determine if GLUT4 is required for overload-induced glucose uptake. Overload was induced in mouse plantaris muscle by unilateral synergist ablation. After 5 days, muscle weights and ex vivo [(3)H]-2-deoxy-D-glucose uptake were assessed. Overload-induced muscle glucose uptake and hypertrophic growth were not impaired in muscle-specific GLUT4 knockout mice, demonstrating that GLUT4 is not necessary for these processes...
March 9, 2017: Diabetes
https://www.readbyqxmd.com/read/28268229/the-hdac-inhibitor-laq824-enhances-epigenetic-reprogramming-and-in-vitro-development-of-porcine-scnt-embryos
#10
Jun-Xue Jin, Sanghoon Lee, Anukul Taweechaipaisankul, Geon A Kim, Byeong Chun Lee
BACKGROUND/AIMS: Hypoacetylation caused by aberrant epigenetic nuclear reprogramming results in low efficiency of mammalian somatic cell nuclear transfer (SCNT). Many epigenetic remodeling drugs have been used in attempts to improve in vitro development of porcine SCNT embryos. In this study, we examined the effects of LAQ824, a structurally novel histone acetylase inhibitor, on the nuclear reprogramming and in vitro development of porcine SCNT embryos. METHODS: LAQ824 treatment was supplemented during the culture of SCNT embryos...
March 7, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28263974/histone-demethylase-jmjd1a-promotes-urinary-bladder-cancer-progression-by-enhancing-glycolysis-through-coactivation-of-hypoxia-inducible-factor-1%C3%AE
#11
W Wan, K Peng, M Li, L Qin, Z Tong, J Yan, B Shen, C Yu
High aerobic glycolysis not only provides energy to cancer cells, but also supports their anabolic growth. JMJD1A, a histone demethylase that specifically demethylates H3K9me1/2, is overexpressed in multiple cancers, including urinary bladder cancer (UBC). It is unclear whether JMJD1A could promote cancer cell growth through enhancing glycolysis. In this study, we found that downregulation of JMJD1A decreased UBC cell proliferation, colony formation and xenograft tumor growth. Knockdown of JMJD1A inhibited glycolysis by decreasing the expression of genes participated in glucose metabolism, including GLUT1, HK2, PGK1, PGM, LDHA and MCT4...
March 6, 2017: Oncogene
https://www.readbyqxmd.com/read/28260073/foxm1-regulates-glycolysis-in-hepatocellular-carcinoma-by-transactivating-glucose-transporter-1-expression
#12
Runze Shang, Meng Pu, Yu Li, Desheng Wang
The Forkhead box M1 (FOXM1) transcription factor plays crucial roles in the initiation and progression of various malignancies, including hepatocellular carcinoma (HCC). However, the mechanism by which FOXM1 regulates cancer metabolism remains unclear. In the present study, overexpression and RNA interference (RNAi) approaches were used to investigate the role of FOXM1 in the regulation of glycolysis in vitro. Luciferase reporter assays were used to explore the transcriptional regulation of the glucose transporter 1 (GLUT1) promoter by FOXM1...
February 22, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28251760/the-nutrient-sensing-repertoires-of-mouse-enterochromaffin-cells-differ-between-duodenum-and-colon
#13
A M Martin, A L Lumsden, R L Young, C F Jessup, N J Spencer, D J Keating
BACKGROUND: Enterochromaffin (EC) cells within the gastrointestinal (GI) tract provide almost all body serotonin (5-hydroxytryptamine [5-HT]). Peripheral 5-HT, released from EC cells lining the gut wall, serves diverse physiological roles. These include modulating GI motility, bone formation, hepatic gluconeogenesis, thermogenesis, insulin resistance, and regulation of fat mass. Enterochromaffin cells are nutrient sensors, but which nutrients they are responsive to and how this changes in different parts of the GI tract are poorly understood...
March 2, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28250970/air-liquid-interface-enhances-oxidative-phosphorylation-in-intestinal-epithelial-cell-line-ipec-j2
#14
Sonja Klasvogt, Werner Zuschratter, Anke Schmidt, Andrea Kröber, Sandra Vorwerk, Romina Wolter, Berend Isermann, Klaus Wimmers, Hermann-Josef Rothkötter, Constanze Nossol
The intestinal porcine epithelial cell line IPEC-J2, cultured under the air-liquid interface (ALI) conditions, develops remarkable morphological characteristics close to intestinal epithelial cells in vivo. Improved oxygen availability has been hypothesised to be the leading cause of this morphological differentiation. We assessed oxygen availability in ALI cultures and examined the influence of this cell culture method on glycolysis and oxidative phosphorylation in IPEC-J2 using the submerged membrane culture (SMC) and ALI cultures...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/28247603/-high-glucose-dialysate-enhances-peritoneal-fibrosis-through-upregulating-glucose-transporters-glut1-and-sglt1
#15
Mengqi Hong, Zhenyu Nie, Zhengyue Chen, Xiongwei Yu, Beiyan Bao
Objective: To investigate the role of glucose transporter 1 (GLUT1) and sodium-glucose cotransporter 1 (SGLT1) in high glucose dialysate-induced peritoneal fibrosis. Methods: Thirty six male SD rats were randomly divided into 6 groups (6 in each):normal control group, sham operation group, peritoneal dialysis group (PD group), PD+phloretin group (PD+T group), PD+phlorizin group (PD+Z group), PD+phloretin+phlorizin group (PD+T+Z group). Rat model of uraemia was established using 5/6 nephrotomy, and 2.5% dextrose peritoneal dialysis solution was used in peritoneal dialysis...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28230866/oridonin-induces-autophagy-via-inhibition-of-glucose-metabolism-in-p53-mutated-colorectal-cancer-cells
#16
Zhuo Yao, Fuhua Xie, Min Li, Zirui Liang, Wenli Xu, Jianhua Yang, Chang Liu, Hongwangwang Li, Hui Zhou, Liang-Hu Qu
The Warburg effect is an important characteristic of tumor cells, making it an attractive therapeutic target. Current anticancer drug development strategies predominantly focus on inhibitors of the specific molecular effectors involved in tumor cell proliferation. These drugs or natural compounds, many of which target the Warburg effect and the underlying mechanisms, still need to be characterized. To elucidate the anticancer effects of a natural diterpenoid, oridonin, we first demonstrated the anticancer activity of oridonin both in vitro and in vivo in colorectal cancer (CRC) cells...
February 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28222430/microrna-218-increases-the-sensitivity-of-bladder-cancer-to-cisplatin-by-targeting-glut1
#17
Peng Li, Xiao Yang, Yidong Cheng, Xiaolei Zhang, Chengdi Yang, Xiaheng Deng, Pengchao Li, Jun Tao, Haiwei Yang, Jifu Wei, Jingyuan Tang, Wenbo Yuan, Qiang Lu, Xiaoting Xu, Min Gu
BACKGROUND/AIMS: MicroRNA-218 (miR-218) is down-regulated in many malignancies that have been implicated in the regulation of diverse processes in cancer cells. However, the involvement of miR-218 in chemo-sensitivity to cisplatin and the precise mechanism of this action remained unknown in bladder cancer. METHODS: qRT-PCR was used to detect miR-218 and its target Glut1 expression in bladder cancer cell lines T24 and EJ. CCK-8 method was utilized to measure the cell viability...
February 20, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28219001/glut1-as-a-prognostic-factor-for-classical-hodgkin-s-lymphoma-correlation-with-pd-l1-and-pd-l2-expression
#18
Young Wha Koh, Jae-Ho Han, Seong Yong Park, Dok Hyun Yoon, Cheolwon Suh, Jooryung Huh
BACKGROUND: Glucose transporter type 1 (GLUT1) expression is linked to glucose metabolism and tissue hypoxia. A recent study reported that GLUT1 was significantly associated with programmed death ligand 1 (PD-L1) as a therapeutic target in relapsed or refractory classical Hodgkin's lymphoma (cHL). The purpose of this study was to measure the expression of GLUT1 and assess its prognostic significance and potential relationships with PD-L1, programmed death ligand 2 (PD-L2), and programmed death-1 (PD-1) expressions in cHL...
March 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28212997/differential-expression-and-prognostic-significance-of-glut1-according-to-histologic-type-of-non-small-cell-lung-cancer-and-its-association-with-volume-dependent-parameters
#19
Young Wha Koh, Su Jin Lee, Seong Yong Park
BACKGROUND: We evaluated glucose transporter type 1 (GLUT1) and carbonic anhydrase IX (CAIX) expression, together with volume-based(18)F-fluorodeoxyglucose positron emission tomography (FDG-PET) parameters, in non-small cell lung cancer (NSCLC) patients, and examined the prognostic significance of those parameters according to its histologic subtype. METHOD: A total of 269 patients, who underwent surgical resection for NSCLC, were reviewed retrospectively. Metabolic tumor volume (MTV) and total lesion glycolysis (TLG) values were measured by preoperative (18)F-fluorodeoxyglucose positron emission tomography computed tomography...
February 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28205432/fluorescent-hexose-conjugates-establish-stringent-stereochemical-requirement-by-glut5-for-recognition-and-transport-of-monosaccharides
#20
Olivier-Mohamad Soueidan, Thomas W Scully, Jatinder Kaur, Rashmi Panigrahi, Alexandr Belovodskiy, Victor Do, Carson D Matier, M Joanne Lemieux, Frank Wuest, Chris Cheeseman, F G West
The specificity characteristics of transporters can be exploited for the development of novel diagnostic therapeutic probes. The facilitated hexose transporter family (GLUTs) has a distinct set of preferences for monosaccharide substrates, and while some are expressed ubiquitously (e.g., GLUT1), others are quite tissue specific (e.g., GLUT5, which is overexpressed in some breast cancer tissues). While these differences have enabled the development of new molecular probes based upon hexose- and tissue-selective uptake, substrate design for compounds targeting these GLUT transporters has been encumbered by a limited understanding of the molecular interactions at play in hexose binding and transport...
February 16, 2017: ACS Chemical Biology
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