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https://www.readbyqxmd.com/read/28728562/low-oxygen-tension-increases-mitochondrial-membrane-potential-and-enhances-expression-of-antioxidant-genes-and-implantation-protein-of-mouse-blastocyst-cultured-in-vitro
#1
Yun-Yi Ma, Huei-Wen Chen, Chii-Ruey Tzeng
BACKGROUND: In human IVF, embryos cultured with a lower O2 tension (5%) can give rise to higher success rates when compared with normoxic conditions (20%). However, the mechanisms behind the beneficial effects of reduced oxygen tension in embryogenesis remain unclear. The aim of this study was to evaluate the expression of oxygen related and antioxidant genes and mitochondrial function in mouse embryo cultured under hypoxic and normoxic conditions, to investigate the beneficial effect of low oxygen tension in preimplantation embryogenesis...
July 20, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28638873/protective-effect-of-camel-milk-as-anti-diabetic-supplement-biochemical-molecular-and-immunohistochemical-study
#2
Ahmed A Mansour, Mohammed A Nassan, Osama M Saleh, Mohamed M Soliman
BACKGROUND: Diabetes is a serious disease affects human health. Diabetes in advanced stages is accompanied by general weakness and alteration in fats and carbohydrates metabolism. Recently there are some scientific trends about the usage of camel milk (CM) in the treatment of diabetes and its associated alterations. CM contains vital active particles with insulin like action that cure diabetes and its complications but how these effects occur, still unclear. MATERIALS AND METHODS: Seventy-five adult male rats of the albino type divided into five equal groups...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28624040/hyperglycemia-attenuates-receptor-activator-of-nf-%C3%AE%C2%BAb-ligand-induced-macrophage-activation-by-suppressing-insulin-signaling
#3
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/28603992/glycosylated-platinum-iv-complexes-as-substrates-for-glucose-transporters-gluts-and-organic-cation-transporters-octs-exhibited-cancer-targeting-and-human-serum-albumin-binding-properties-for-drug-delivery
#4
Jing Ma, Qingpeng Wang, Zhonglv Huang, Xiande Yang, Quandeng Nie, Wenpei Hao, Peng George Wang, Xin Wang
Glycosylated platinum(IV) complexes were synthesized as substrates for GLUTs and OCTs for the first time, and the cytotoxicity and detailed mechanism were determined in vitro and in vivo. Galactoside Pt(IV), glucoside Pt(IV), and mannoside Pt(IV) were highly cytotoxic and showed specific cancer-targeting properties in vitro and in vivo. Glycosylated platinum(IV) complexes 5, 6, 7, and 8 (IC50 0.24-3.97 μM) had better antitumor activity of nearly 166-fold higher than the positive controls cisplatin (1a), oxaliplatin (3a), and satraplatin (5a)...
June 27, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28570686/acute-bout-of-exercise-induced-prolonged-muscle-glucose-transporter-4-translocation-and-delayed-counter-regulatory-hormone-response-in-type-1-diabetes
#5
Koji Sato, Takeshi Nishijima, Takumi Yokokawa, Satoshi Fujita
Previous studies have demonstrated that an acute bout of aerobic exercise induces a subsequent delayed onset of hypoglycemia among patients with type 1 diabetes. However, the mechanisms of exercise-induced hypoglycemia in type 1 diabetes are still unclear. Streptozotocin (STZ) was injected to 6-week-old male Wistar rats, and three days after STZ injection, animals were randomly assigned into 2 groups: STZ with insulin only (STZ) and STZ with insulin and exercise (STZ+EX). Normal Wistar rats with exercise were used as control (CON+EX)...
2017: PloS One
https://www.readbyqxmd.com/read/28542798/glut-1-receptor-expression-and-circulating-levels-of-fasting-glucose-in-high-grade-serous-ovarian-cancer
#6
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/28427288/cigarette-smokers-develop-altered-erythrocyte-membrane-composition-an-investigation-unmasking-the-role-of-membrane-bound-integral-protein-glut-1
#7
Jyotirmoy Sikdar, Paromita Seal, Amartya Roy, Rajen Haldar
Erythrocytes in cigarette smokers are prone to oxidative damage. Here, we sought to elucidate the facts behind modifications and possible defense system developed in erythrocyte of cigarette smokers. We observed significant increase in stomatocytes and spherocytes, and osmotic fragility of erythrocyte, along with reduced level of protein thiol and increased fluorescence anisotropy in isolated membrane. Denaturing gel electrophoresis indicated alterations in band 3, band 4.2 and band 4.5. Among those, Glut 1 (i...
May 10, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28410190/dietary-oleuropein-inhibits-tumor-angiogenesis-and-lymphangiogenesis-in-the-b16f10-melanoma-allograft-model-a-mechanism-for-the-suppression-of-high-fat-diet-induced-solid-tumor-growth-and-lymph-node-metastasis
#8
Hyerim Song, Do Young Lim, Jae In Jung, Han Jin Cho, So Young Park, Gyoo Taik Kwon, Young-Hee Kang, Ki Won Lee, Myung-Sook Choi, Jung Han Yoon Park
Previously, we reported that high-fat-diet (HFD)-induced obesity stimulates melanoma progression in the B16F10 allograft model. In this study, we examined whether oleuropein (OL), the most abundant phenolic compound in olives, inhibits HFD-induced melanoma progression. Four-week-old male C57BL/6N mice were fed a HFD-diet with or without OL. After 16 weeks of feeding, B16F10-luc cells were subcutaneously injected and the primary tumor was resected 3 weeks later. OL suppressed HFD-induced solid tumor growth. In the tumor tissues, OL reduced HFD-induced expression of angiogenesis (CD31, VE-cadherin, VEGF-A, and VEGFR2), lymphangiogenesis (LYVE-1, VEGF-C, VEGF-D, and VEGFR3), and hypoxia (HIF-1α and GLUT-1) markers as well as HFD-induced increases in lipid vacuoles and M2 macrophages (MΦs)...
May 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28407791/accelerated-differentiation-of-human-induced-pluripotent-stem-cells-to-blood-brain-barrier-endothelial-cells
#9
Emma K Hollmann, Amanda K Bailey, Archit V Potharazu, M Diana Neely, Aaron B Bowman, Ethan S Lippmann
BACKGROUND: Due to their ability to limitlessly proliferate and specialize into almost any cell type, human induced pluripotent stem cells (iPSCs) offer an unprecedented opportunity to generate human brain microvascular endothelial cells (BMECs), which compose the blood-brain barrier (BBB), for research purposes. Unfortunately, the time, expense, and expertise required to differentiate iPSCs to purified BMECs precludes their widespread use. Here, we report the use of a defined medium that accelerates the differentiation of iPSCs to BMECs while achieving comparable performance to BMECs produced by established methods...
April 13, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28404916/expression-of-hif-1%C3%AE-in-medullary-thyroid-cancer-identifies-a-subgroup-with-poor-prognosis
#10
Lutske Lodewijk, Paul van Diest, Petra van der Groep, Natalie Ter Hoeve, Abbey Schepers, Johannes Morreau, Johannes Bonenkamp, Adriana van Engen-van Grunsven, Schelto Kruijff, Bettien van Hemel, Thera Links, Els Nieveen van Dijkum, Susanne van Eeden, Gerlof Valk, Inne Borel Rinkes, Menno Vriens
BACKGROUND: Medullary thyroid cancer (MTC) comprises only 4% of all thyroid cancers and originates from the parafollicular C-cells. HIF-1α expression has been implied as an indicator of worse prognosis in various solid tumors. However, whether expression of HIF-1α is a prognosticator in MTC remained unclear. Our aim was to evaluate the prognostic value of HIF-1α in patients with MTC. METHODS: All patients with MTC who were operated on between 1988 and 2014 in five tertiary referral centers in The Netherlands were included...
April 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28346751/d-fructose-modification-enhanced-internalization-of-mixed-micelles-in-breast-cancer-cells-via-glut5-transporters
#11
Xu Zhou, Xianyan Qin, Tao Gong, Zhi-Rong Zhang, Yao Fu
d-Fructose modified poly(ε-caprolactone)-polyethylene glycol (PCL-PEG-Fru) diblock amphiphile is synthesized via Cu(I)-catalyzed click chemistry, which self-assembles with D-α-tocopheryl polyethylene glycol 1000 succinate (TPGS) into PCL-PEG-Fru/TPGS mixed micelles (PPF MM). It has been proven that glucose transporter (GLUT)5 is overexpressed in MCF-7 cells other than L929 cells. In this study, PPF MM exhibit a significantly higher uptake efficiency than fructose-free PCL-PEG-N3 /TPGS mixed micelles in both 2D MCF-7 cells and 3D tumor spheroids...
July 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28346703/tunable-glut-hexose-binding-and-transport-via-modulation-of-hexose-c-3-hydrogen-bonding-capabilities
#12
Venkata Pavan Kumar Kondapi, Olivier-Mohamad Soueidan, Christopher I Cheeseman, Frederick G West
The importance of the hydrogen bonding interactions in the GLUT-hexose binding process (GLUT=hexose transporter) has been demonstrated by studying the binding of structurally modified d-fructose analogues to GLUTs, and in one case its transport into cells. The presence of a hydrogen bond donor at the C-3 position of 2,5-anhydro-d-mannitol derivatives is essential for effective binding to GLUT5 and transport into tumor cells. Surprisingly, installation of a group that can function only as a hydrogen bond acceptor at C-3 resulted in selective recognition by GLUT1 rather than GLUT5...
March 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28324019/nitric-oxide-mediated-regulation-of-glut-by-t3-and-follicle-stimulating-hormone-in-rat-granulosa-cells
#13
Ye Tian, Yu Ding, Juan Liu, Dai Heng, Kaili Xu, Wenbo Liu, Cheng Zhang
Thyroid hormones are important for normal reproductive function. Although 3,5,3'-triiodothyronine (T3) enhances follicle-stimulating hormone (FSH)-induced preantral follicle growth and granulosa cells development in vitro, little is known about the molecular mechanisms regulating ovarian development via glucose. In this study, we investigated whether and how T3 combines with FSH to regulate glucose transporter protein (GLUT) expression and glucose uptake in granulosa cells. In this study, we present evidence that T3 and FSH cotreatment significantly increased GLUT-1/GLUT-4 expression, and translocation in cells, as well as glucose uptake...
June 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28320046/increased-insulin-resistance-and-glucagon-levels-in-mild-inactive-systemic-lupus-patients-despite-normal-glucose-tolerance
#14
Cíntia Nh Miyake, Bruno Gualano, Wagner S Dantas, Renato T Pereira, William Neves, Vanessa O Zambelli, Samuel K Shinjo, Rosa M Pereira, Elizabeth R Silva, Ana Lúcia Sá-Pinto, Eduardo Borba, Hamilton Roschel, Eloisa Bonfá, Fabiana B Benatti
OBJECTIVE: To assess insulin sensitivity in patients with systemic lupus erythematosus (SLE) in response to a meal tolerance test (MTT). METHODS: In this cross-sectional study, 33 adult females mild/inactive SLE and 16 age- and body mass index (BMI)-matched female healthy controls (CTRL) underwent a MTT and were assessed for insulin sensitivity and beta-cell function. Skeletal muscle protein expressions of total and membrane GLUT-4 were also evaluated (SLE, n=10; CTRL, n=5); muscle biopsies were performed after MTT...
March 20, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28319810/inhibitors-of-glut-slc2a-enhance-the-action-of-bcnu-and-temozolomide-against-high-grade-gliomas
#15
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...
April 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28299426/immunoexpression-of-glut-1-and-angiogenic-index-in-pleomorphic-adenomas-adenoid-cystic-carcinomas-and-mucoepidermoid-carcinomas-of-the-salivary-glands
#16
Lélia Batista de Souza, Lucileide Castro de Oliveira, Cassiano Francisco Weege Nonaka, Maria Luiza Diniz de Sousa Lopes, Leão Pereira Pinto, Lélia Maria Guedes Queiroz
This study aimed to evaluate and compare the immunoexpression of glucose transporter-1 (GLUT-1) and angiogenic index between pleomorphic adenomas (PAs), adenoid cystic carcinomas (ACCs), and mucoepidermoid carcinomas (MECs) of the salivary glands, and establish associations with the respective subtype/histological grade. Twenty PAs, 20 ACCs, and 10 MECs were submitted to morphological and immunohistochemical analysis. GLUT-1 expression was semi-quantitatively evaluated and angiogenic index was assessed by microvessel counts using anti-CD34 antibody...
March 16, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28279980/glut4-is-not-necessary-for-overload-induced-glucose-uptake-or-hypertrophic-growth-in-mouse-skeletal-muscle
#17
Shawna L McMillin, Denise L Schmidt, Barbara B Kahn, Carol A Witczak
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 whether 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...
June 2017: Diabetes
https://www.readbyqxmd.com/read/28205432/fluorescent-hexose-conjugates-establish-stringent-stereochemical-requirement-by-glut5-for-recognition-and-transport-of-monosaccharides
#18
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...
March 2, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28192456/the-flavanone-homoeriodictyol-increases-sglt-1-mediated-glucose-uptake-but-decreases-serotonin-release-in-differentiated-caco-2-cells
#19
Barbara Lieder, Julia Katharina Hoi, Ann-Katrin Holik, Katrin Geissler, Joachim Hans, Barbara Friedl, Kathrin Liszt, Gerhard E Krammer, Jakob P Ley, Veronika Somoza
Flavanoids and related polyphenols, among them hesperitin, have been shown to modulate cellular glucose transport by targeting SGLT-1 and GLUT-2 transport proteins. We aimed to investigate whether homoeriodictyol, which is structurally related to hesperitin, affects glucose uptake in differentiated Caco-2 cells as a model for the intestinal barrier. The results revealed that, in contrast to other polyphenols, the flavanon homoeriodictyol promotes glucose uptake by 29.0 ± 3.83% at a concentration of 100 μM...
2017: PloS One
https://www.readbyqxmd.com/read/28173667/-expression-of-hypoxia-inducible-factor-1%C3%AE-glucose-transporter-1-and-lactate-dehydrogenase-5-in-colorectal-cancer-and-clinicopathologic-significance
#20
T Y Yang, L S Hao, D Z Guo
Objective: To investigate the expression and clinicopathological significance of hypoxia-inducible factor 1 alpha (HIF-1α), glucose transporter 1(GLUT-1) and lactate dehydrogenase(LDH)-5 in colorectal cancer. Methods: The expression levels of HIF-1α, GLUT-1 and LDH-5 were detected by immunohistochemical staining in 142 specimens of human carcinoma in comparison with adjacent normal tissues. Results: The expression levels of HIF-1α(78.2%, 111/142), GLUT-1(75.4%, 107/142) and LDH-5(68.3%, 97/142) were higher in tumor tissues than in adjacent normal tissues(14...
February 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
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