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https://www.readbyqxmd.com/read/28718701/occludin-regulates-glucose-uptake-and-atp-production-in-pericytes-by-influencing-amp-activated-protein-kinase-activity
#1
Victor Castro, Marta Skowronska, Jorge Lombardi, Jane He, Neil Seth, Martina Velichkovska, Michal Toborek
Energetic regulation at the blood-brain barrier is critical for maintaining its integrity, transport capabilities, and brain demands for glucose. However, the underlying mechanisms that regulate these processes are still poorly explored. We recently characterized the protein occludin as a NADH oxidase and demonstrated its influence on the expression and activation of the histone deacetylase SIRT-1. Because SIRT-1 works in concert with AMP-activated protein kinase (AMPK) (AMPK), we investigated the impact of occludin on this metabolic switch...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28705470/hypoxia-and-hypoxia-response-associated-molecular-markers-in-esophageal-cancer-a-systematic-review
#2
REVIEW
Jurgen Peerlings, Lien Van De Voorde, Cristina Mitea, Ruben Larue, Ala Yaromina, Sebastian Sandeleanu, Linda Spiegelberg, Ludwig Dubois, Philippe Lambin, Felix M Mottaghy
PURPOSE: In this systematic review, the existing evidence of available hypoxia-associated molecular response biomarkers in esophageal cancer (EC) patients is summarized and set into the context of the role of hypoxia in the prediction of esophageal cancer, treatment response and treatment outcome. METHODS: A systematic literature search was performed in Web of Science, MEDLINE, and PubMed databases using the keywords: hypoxia, esophagus, cancer, treatment outcome and treatment response...
July 10, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28698401/glucose-transporter-1-as-an-independent-prognostic-marker-for-cancer-a-meta-analysis
#3
Zheng-Xiao Zhao, Lin-Wei Lu, Jian Qiu, Qiu-Ping Li, Fei Xu, Bao-Jun Liu, Jing-Cheng Dong, Wei-Yi Gong
OBJECTIVE: Glucose transporter-1 (GLUT-1) as the major glucose transporter present in human cells is found overexpressed in a proportion of human malignancies. This meta-analysis is attempted to assess the prognostic significance of GLUT-1 for survival in various cancers. MATERIALS AND METHODS: We conducted an electronic search using the databases PubMed, Embase and Web of Science, from inception to Oct 20th, 2016. Pooled hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated...
July 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28685443/environmental-enrichment-induces-increased-cerebral-capillary-density-and-improved-cognitive-function-in-mice
#4
Chuan He, Constantinos P Tsipis, Joseph C LaManna, Kui Xu
Enrichment provides an environment that fosters increased physical activity and sensory stimulation as compared to standard housing. Promoting and sustaining stimulation increases neuronal activity and, consequently, brain oxygen demand. The mammalian brain modulates its microvascular network to accommodate tissue energy demand in a process referred to as angioplasticity. In this study we investigated the effect of an environmental enrichment on cerebral capillary density and cognitive performance in mice. Microvascular density (N/mm(2)) was determined by GLUT-1 immunohistochemistry in mice (3 months old) after 3 weeks of placement in a non-enriched or an enriched environment...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28684236/development-of-insulin-resistance-through-sprouting-of-inflammatory-markers-during-hypoxia-in-3t3-l1-adipocyte-and-amelioration-with-curcumin
#5
A Priyanka, G L Shyni, Anupama Nair, P Salin Raj, S S Anusree, K G Raghu
The role of phytochemicals in general well-being has been recognized. Curcumin is an ideal example. Hypoxia in adipose tissue is a major cause of inflammation and insulin resistance in obesity. Herein we mainly explored inflammation, insulin resistance and angiogenesis in 3T3-L1 adipocytes and possible reversal with the curcumin during hypoxia. Hypoxia for 24h significantly increased (P ≤ 0.05) the secretion of monocyte chemotactic protein-1 (4.59 fold), leptin (2.96 fold) and reduced adiponectin (2.93 fold)...
July 3, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28625360/hypoxia-primed-placental-mesenchymal-stem-cells-for-wound-healing
#6
Suja Ann Mathew, Bhawna Chandravanshi, Ramesh Bhonde
AIMS: To investigate how Placental Mesenchymal Stem Cells (P-MSCs) would adapt themselves and survive under hypoxic conditions which are prevalent in most injury sites. MAIN METHODS: P-MSCs were isolated from term placenta and characterised under normoxia and hypoxia (2-2.5% O2). Cells were examined for morphology and surface marker variations by flow cytometry analysis. Glucose stimulated insulin secretion was assayed by Insulin ELISA Kit. Gene expression levels were estimated using Real Time PCR for hypoxia inducible factor1 alpha, Insulin (INS), Glucose transporters (GLUT-1, GLUT-2 and GLUT-3), Adhesion Proteins- Integrins, Fibronectin1 (FN1), E-Cadherin (CDH1), and N-Cadherin (CDH2) and angiogenesis marker VEGFA...
August 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/28624040/hyperglycemia-attenuates-receptor-activator-of-nf-%C3%AE%C2%BAb-ligand-induced-macrophage-activation-by-suppressing-insulin-signaling
#7
Chitaru Kurihara, Teruyoshi Tanaka, Dai Yamanouchi
BACKGROUND: Although male gender, aging, hypertension, dyslipidemia, and smoking are common risk factors for abdominal aortic aneurysm, diabetes mellitus is an independent negative risk factor. In aneurysm tissue, matrix metalloproteinases (MMPs) expressed by activated macrophages degrades extracellular matrix proteins. In our previous experimental study, we demonstrated that the aneurysmal formation and macrophage activity were suppressed by inhibiting mimicking hyperglycemia (HG) through upregulation of glucose-sensing nuclear receptor, Nr1h2...
June 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28623979/placental-glucose-transporter-glut-1-is-down-regulated-in-preeclampsia
#8
Benjamin P Lüscher, Camilla Marini, Marianne S Joerger-Messerli, Xiao Huang, Matthias A Hediger, Christiane Albrecht, Marc U Baumann, Daniel V Surbek
INTRODUCTION: Transplacental fetal glucose supply is predominantly regulated by glucose transporter-1 (GLUT1). Altered expression and/or function of GLUT1 may affect the intrauterine environment, which could compromise fetal development and may contribute to fetal programming. To date it is unknown whether placental GLUT1 is affected by preeclampsia, which is often associated with intrauterine growth restriction (IUGR). We addressed the hypothesis that preeclampsia leads to decreased expression and function of placental GLUT1...
July 2017: Placenta
https://www.readbyqxmd.com/read/28619363/acute-hypoxic-stress-effect-on-blood-parameters-antioxidant-enzymes-and-expression-of-hif-1alpha-and-glut-1-genes-in-largemouth-bass-micropterus-salmoides
#9
S Yang, T Yan, H Wu, Q Xiao, H M Fu, J Luo, J Zhou, L L Zhao, Y Wang, S Y Yang, J L Sun, X Ye, S J Li
Dissolved oxygen (DO) plays a crucial role in survival, growth, and normal physiological functions of aquatic organisms. Nevertheless, the mechanisms involved in hypoxic stress and adaptation have not been fully elucidated in Largemouth bass (Micropterus salmoides). To reveal the effect of acute hypoxia on Largemouth bass, we simulated acute hypoxia (DO: 1.2 ± 0.2 mg/L) in the laboratory and analyzed physiological parameters (RBCs, Hb, SOD, CAT, NA(+)/K(+)-ATPase, GPx, and MDA) and gene expression (HIF-1alpha and GLUT-1) in Largemouth bass exposed to various durations of acute hypoxia (0, 1, 2, 4, 8, 12, and 24 h)...
August 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28608234/genomics-guided-precise-anti-epileptic-drug-development
#10
Norman Delanty, Gianpiero Cavallleri
Traditional antiepileptic drug development approaches have yielded many important clinically valuable anti-epileptic drugs. However, the screening of promising compounds has been naturally agnostic to epilepsy etiology in individual human patients. Now, genomic medicine is changing the way we view human disease. International collaborations are unraveling the many molecular genetic causes of the epilepsies, including the early onset epileptic encephalopathies, and some of the familial focal epilepsies. Further advances in precision diagnostics will be facilitated by ongoing large collaborations and the wider availability of whole exome and whole genome sequencing in clinical practice...
July 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28602263/immunohistochemical-and-histochemical-characterization-of-intraosseous-arteriovenous-malformations-of-the-jaws-analysis-of-16-cases-with-emphasis-on-glut-1-immunophenotype
#11
Reda Taleb, Ioannis G Koutlas, Prokopios P Argyris
OBJECTIVES: Intraosseous vascular lesions of the craniofacial region are rare and may cause diagnostic and therapeutic challenges. The purpose of this study was to characterize 16 cases of intraosseous arteriovenous malformations (AVMs) affecting the jaws. STUDY DESIGN: Immunohistochemical evaluation was performed using antibodies against α-smooth muscle actin (α-SMA), desmin, CD31, D2-40, and glucose transporter 1 (GLUT-1). Staining with elastic Verhoeff-Van Gieson and Masson trichrome histochemical stains was also performed...
April 25, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28588000/effect-of-maternal-obesity-on-fetal-growth-and-the-expression-of-placental-fatty-acid-transporters
#12
Kui Ye, Li Li, Dan Zhang, Yi Li, Hai Qing Wang, Han Lin Lai, Chuan Lai Hu
OBJECTIVE: To explore the effects of maternal high-fat diet induced obesity on fetal growth and the expression of placental nutrient transporters. METHODS: Maternal obesity was established in rats by 8 weeks of pre-pregnancy high-fat (HF) diet feeding, while rats in the control group were fed with normal (CON) diet. Diet induced obesity (DIO) rats and diet induced obesity resistant (DIR) rats were selected according to body weight gain over this period. After copulation, the CON rats were divided into two groups: switched to HF diet (CON-HF group) or maintained on the CON diet (CON-CON group)...
June 7, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28583471/expression-of-glucose-transporter-proteins-in-human-diabetic-placenta
#13
REVIEW
Paweł Jan Stanirowski, Dariusz Szukiewicz, Monika Pazura-Turowska, Włodzimierz Sawicki, Krzysztof Cendrowski
Gestational diabetes mellitus and pregestational diabetes mellitus constitute carbohydrate metabolism disorders, which, if not diagnosed and adequately treated, lead to serious and often life-threatening pregnancy complications. According to a recently formulated hypothesis, some diabetes-related complications, such as fetal macrosomia, may be the result of disturbances in the transplacental transport of nutrients-in particular, excessive maternal-fetal glucose transfer. Throughout pregnancy, glucose flux across the placenta is mediated by the group of facilitative glucose transporters (GLUT), the expression of which in different placental compartments is the precondition for effective glucose uptake from maternal blood and its subsequent transfer to the fetal circulation...
June 2, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28556628/tris-base-buffer-a-promising-new-inhibitor-for-cancer-progression-and-metastasis
#14
Arig Ibrahim-Hashim, Dominique Abrahams, Pedro M Enriquez-Navas, Kim Luddy, Robert A Gatenby, Robert J Gillies
Neutralizing tumor external acidity with oral buffers has proven effective for the prevention and inhibition of metastasis in several cancer mouse models. Solid tumors are highly acidic as a result of high glycolysis combined with an inadequate blood supply. Our prior work has shown that sodium bicarbonate, imidazole, and free-base (but not protonated) lysine are effective in reducing tumor progression and metastasis. However, a concern in translating these results to clinic has been the presence of counter ions and their potential undesirable side effects (e...
July 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28545938/an-update-of-77-cases-diagnosed-as-oral-hemangiomas-based-on-glut-1-positivity
#15
Tiago João da Silva Filho, Denise Hélen Imaculada Pereira de Oliveira, Veruska Lima Moura Brasil, Cassiano Francisco Weege Nonaka, Éricka Janine Dantas da Silveira, Lélia Maria Guedes Queiroz
OBJECTIVES: To evaluate cases diagnosed as "oral hemangiomas" based on the immunohistochemical expression of human glucose transporter protein (GLUT-1) and on histopathological features, and to investigate whether the classification proposed by the ISSVA was used correctly to classify these lesions. MATERIAL AND METHODS: All cases stored in the archives of an Oral Pathology Service and diagnosed as "oral hemangiomas" were reviewed. Seventy-seven cases were analyzed regarding the expression of GLUT-1...
May 22, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28542798/glut-1-receptor-expression-and-circulating-levels-of-fasting-glucose-in-high-grade-serous-ovarian-cancer
#16
Laura Pizzuti, Domenico Sergi, Chiara Mandoj, Barbara Antoniani, Francesca Sperati, Andrea Chirico, Luigi Di Lauro, Mario Valle, Alfredo Garofalo, Enrico Vizza, Giacomo Corrado, Federica Tomao, Massimo Rinaldi, Silvia Carpano, Marcello Maugeri-Saccà, Laura Conti, Giovanna Digiesi, Paolo Marchetti, Ruggero De Maria, Antonio Giordano, Maddalena Barba, Maria A Carosi, Patrizia Vici
In recent years, the poorly remarkable goals achieved in terms of patients' important outcomes for ovarian cancer have fueled our interest toward the study of its metabolic roots. Within this research pipeline, we assessed the association between the expression of the glucose transporter GLUT1, as expressed at the tumor tissue level, and circulating pre-surgical levels of fasting glucose in a case series including data from 40 patients with high FIGO stage serous ovarian cancer. Patients who provided data to the current analysis were randomly selected from a larger cohort...
May 20, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28540848/myoclonic-jerks-are-commonly-associated-with-absence-seizures-in-early-onset-absence-epilepsy
#17
Hala Nasser, Elisa Lopez-Hernandez, Adina Ilea, Neli Le Morvan, Vanina Bellavoine, Catherine Delanoë, Stéphane Auvin
Typical absence seizures are observed in various epilepsy syndromes, however, few series have focused on early-onset absence epilepsy (EOAE). We aimed to evaluate the occurrence of this seizure type in children under 4 years of age in order to evaluate their electroclinical characteristics and outcome. We retrospectively studied (2006-2014) the electroclinical features of children with normal development and typical absence seizures starting before the age of 4 (with available pre-treatment video-EEG). Nine patients were included...
May 24, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28535336/transport-of-the-glucosamine-derived-browning-product-fructosazine-polyhydroxyalkylpyrazine-across-the-human-intestinal-caco-2-cell-monolayer-role-of-the-hexose-transporters
#18
Abhishek Bhattacherjee, Yuliya Hrynets, Mirko Betti
The transport mechanism of fructosazine, a glucosamine self-condensation product, was investigated using a Caco-2 cell model. Fructosazine transport was assessed by measuring the bidirectional permeability coefficient across Caco-2 cells. The mechanism of transport was evaluated using phlorizin, an inhibitor of sodium-dependent glucose cotransporters (SGLT) 1 and 2, phloretin and quercetin, inhibitors of glucose transporters (GLUT) 1 and 2, transcytosis inhibitor wortmannin, and gap junction disruptor cytochalasin D...
June 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28527957/streptozotocin-alters-glucose-transport-connexin-expression-and-endoplasmic-reticulum-functions-in-neurons-and-astrocytes
#19
Joyshree Biswas, Sonam Gupta, Dinesh Kumar Verma, Sarika Singh
The study was undertaken to explore the cell-specific streptozotocin (STZ)-induced mechanistic alterations. STZ-induced rodent model is a well-established experimental model of Alzheimer's disease (AD) and in our previous studies we have established it as an in vitro screening model of AD by employing N2A neuronal cells. Therefore, STZ was selected in the present study to understand the STZ-induced cell-specific alterations by utilizing neuronal N2A and astrocytes C6 cells. Both neuronal and astrocyte cells were treated with STZ at 10, 50, 100 and 1000μM concentrations for 48h...
May 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28512274/glucose-transporter-1-expression-in-odontogenic-keratocyst-dentigerous-cyst-and-ameloblastoma-an-immunohistochemical-study
#20
Alokenath Bandyopadhyay, Abikshyeet Panda, Shyam S Behura, Sujatha Ramachandra, Kailash C Dash, Pallavi Mishra
INTRODUCTION: An array of odontogenic lesions manifest in the maxillofacial region with variable presentations. The biological behavior of lesions, such as odontogenic keratocyst (OKC), dentigerous cyst (DC), and ameloblastoma (AM) always invite debate. Glucose transporter 1 (GLUT-1) is proven to be an indicator of metabolic behavior of several benign and malignant neoplasms. AIM: The purpose of this study was to evaluate the expression of GLUT-1 in OKC, DC, and AM to understand their metabolic behavior...
May 1, 2017: Journal of Contemporary Dental Practice
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