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Glut 5

Huijun Wang, Mark Fowler, David Messenge, Leon A Terry, Xuelan Gu, Luxian Zhou, Ruimin Liu, Juan Su, Songshan Shi, Jos Eacute Ordaz-Ortiz, Guoping Lian, Mark Berry, Shunchun Wang
Foods of high carbohydrate content such as sucrose or starch increase postprandial blood glucose concentrations. The glucose absorption system in the intestine comprises two components: sodium-dependent glucose transporter-1 (SGLT1) and glucose transporter 2 (GLUT2). Here five sappanin-type (SAP) homoisoflavonoids were identified as novel potent GLUT2 inhibitors, with three of them isolated from the fibrous roots of Polygonatum odoratum (Mill.) Druce. SAP homoisolflavonoids had a stronger inhibitory effect on 25 mM glucose transport (41...
March 13, 2018: Journal of Agricultural and Food Chemistry
Ting Deng, Yu Zhang, Yang Wu, Ping Ma, Jiufei Duan, Wei Qin, Xu Yang, Mingqing Chen
Epidemiological studies suggest a positive relationship between phthalate exposure and diabetes. However, little is known about the impact of dibutyl phthalate (DBP) exposure on the development of diabetes. To determine the role of DBP exposure on the development of type 2 diabetes, mice were orally exposed to DBP dosages of 0.5, 5, 50 mg/kg/day for 7 weeks, combined with a high fat diet and injections of a low dose of streptozotocin (STZ). The results showed that exposure to 50 mg/kg/day DBP alone induced a marked decrease in insulin secretion and glucose intolerance, but had no influence on insulin resistance...
March 8, 2018: Toxicology Letters
Jyotibala Banjare, Prerna Raina, Prakash Mansara, Ruchika Kaul Ghanekar, Supriya Bhalerao
Background: Triphala, an Ayurvedic polyherbal formulation, is used for the treatment of various diseases including obesity. Objective: The present study was planned to evaluate the anti-adipogenic potential of aqueous extract of Triphala (TPaq ) using 3T3-L1 adipocyte cell line model. Methods: The effect of aqueous extract of Triphala (TPaq ) was tested on the viability of 3T3- L1 cells by MTT assay. The cells were treated with a cocktail of dexamethasone (DEX), isobutylmethylxanthine (IBMX) and insulin to induce adipogenesis...
January 2018: Pharmacognosy Magazine
Taiming Liu, Meijuan Zhang, Michael H Terry, Hobe Schroeder, Sean Wilson, Gordon Power, Qian Li, Trent Tipple, Dan Borchardt, Arlin Blood
Glutathione-liganded binuclear dinitrosyl iron complex (glut-BDNIC) has been proposed to be a donor of nitric oxide (NO). This study was undertaken to investigate the mechanisms of vasoactivity, systemic hemodynamic effects, and pharmacokinetics of glut-BDNIC. To test the hypothesis that glut-BDNICs vasodilate by releasing NO in its reduced (HNO) state, a bioassay method of isolated, preconstricted ovine mesenteric arterial rings was used in the presence of selective scavengers of HNO or NO free radical (NO⋅), the vasodilatory effects of glut-BDNIC were found to have characteristics similar to those of an HNO donor and markedly different than a NO⋅ donor...
February 23, 2018: Molecular Pharmacology
Kuo-Ping Shen, Hui-Li Lin, Hsueh-Wei Yen, Su-Ling Hsieh, Li-Mei An, Bin-Nan Wu
This study examined the effects of eugenosedin-A (Eu-A) in a streptozotocin (STZ)/nicotinamide-induced rat model of type II diabetes mellitus (T2DM). Six-week-old Sprague-Dawley rats were randomly divided into three groups: (1) RD group, normal rats fed a regular diet (RD), (2) DM group, T2DM rats fed a high-fat diet, and (3) Eu-A group, T2DM rats fed a high fat diet plus oral Eu-A (5 mg/kg/day). After 30 days, the DM group had higher body weight, higher blood glucose and lower insulin levels than the RD group...
March 2018: Kaohsiung Journal of Medical Sciences
Yan Cao, Xiaoli Chen, Ying Sun, Jialiang Shi, Xiaojuan Xu, Yong-Cheng Shi
Pyrodextrin shares some properties of resistant starch which is metabolically beneficial, and has potential applications as a functional food. In this study, we report that oral administration of pyrodextrin (50 mg/kg/d for 7 weeks) decreased the blood glucose (from 9.18±1.47 to 7.67±0.42 mmol/L), serum HbA1c, triglycerides, adipocyte size, and body weights (from 24.4±1.2 to 22.5±1.2 g) in high-fat diet-induced obese mice. The Western blotting analysis suggested that pyrodextrins decreased the intestinal SGLT-1 and GLUT-2 expression to ~70% and ~60% of the obese control to slow down glucose transportation from gut into blood, and improved the hepatic metabolism tentatively...
February 15, 2018: Journal of Agricultural and Food Chemistry
Ri-Su Na, Cong Ma, Qiao-Rui Liu, Li-Ming Wu, Xu-Lei Zheng, Zhi-Wen Liu
The primarily metabolic abnormality in type 2 diabetes mellitus (T2DM) is the defect in gluconeogenesis and glucose uptake. Itraconazole (ITCZ) is a traditional azole drug with anti-fungal and anticancer properties. However, limited attention has been directed towards the contribution of ITCZ to hepatic gluconeogenesis and glucose uptake in T2DM. The present study aimed to investigate the potential effects of ITCZ on hepatic gluconeogenesis and glucose uptake as well as the underlying mechanisms. No obvious change in cell viability was detected by MTT assay in HepG2 cells with ITCZ treatment at gradually increasing concentrations...
February 2018: Experimental and Therapeutic Medicine
Ragıp Pala, Eyup Genc, Mehmet Tuzcu, Cemal Orhan, Nurhan Sahin, Besir Er, Vedat Cinar, Kazim Sahin
In this study, the effects of L-Carnitine supplementation on the lipid peroxidation and expression of PPAR-γ and glucose transporters in the liver and muscles of chronically and acutely exercised rats were investigated. A total of 42 male Wistar Albino rats (8-week-old) were divided into six groups as follows: Control, L-Carnitine, Chronic Exercise (CE), Chronic Exercise + L-Carnitine, Acute Exercise (AE) and L-Carnitine + Acute Exercise. Chronic exercise consists of 30 m/min, 30 min/day, and 5 days/week for 6 weeks...
January 31, 2018: Cellular and Molecular Biology
E Coudert, C Praud, J Dupont, S Crochet, E Cailleau-Audouin, T Bordeau, E Godet, A Collin, C Berri, S Tesseraud, S Métayer-Coustard
Glucose transport into cells is the first limiting step for the regulation of glucose homeostasis. In mammals, it is mediated by a family of facilitative glucose transporters (GLUTs) (encoded by SLC2A* genes), with a constitutive role (GLUT1), or insulin-sensitive transporters (GLUT4, GLUT8 and GLUT12). Compared to mammals, the chicken shows high levels of glycaemia and relative insensitivity to exogenous insulin. To date, only GLUT1, -8 and -12 have been described in chicken skeletal muscles but not fully characterized, whereas GLUT4 was reported as lacking...
February 1, 2018: Journal of Animal Science
Juncheng Zhuo, Qiaohuang Zeng, Dake Cai, Xiaohui Zeng, Yuxing Chen, Haining Gan, Xuejun Huang, Nan Yao, Dane Huang, Chengzhe Zhang
Type 2 diabetic mellitus (T2DM), which is characterized by insulin resistance (IR), hyperglycemia and hyperlipidemia, is a comprehensive dysfunction of metabolism. The insulin receptor (INSR)/phosphoinositide 3‑kinase (PI3K)/AKT signaling pathway is well acknowledged as a predominant pathway associated with glucose uptake; however, the effect of streptozotocin (STZ) plus a high fat and sugar diet (HFSD) on the proteins associated with this pathway requires further elucidation. In order to explore this effect, a T2DM rat model was constructed to investigate T2DM pathogenesis and potential therapeutic advantages...
January 26, 2018: Molecular Medicine Reports
Qiong Ou-Yang, Chun-Xiao Xuan, Xue Wang, Han-Qiong Luo, Jin-E Liu, Lan-Lan Wang, Ting-Ting Li, Yu-Peng Chen, Jun Liu
3-Acetyl-oleanolic acid (3Ac-OA) is a derivative of oleanolic acid (OA), which has shown therapeutic beneficial effects on diabetes and metabolic syndrome. In this study we investigated whether 3Ac-OA exerted beneficial effect on non-alcoholic fatty liver disease (NAFLD) in rats and its potential underlying mechanisms. Treatment with 3Ac-OA (1-100 μmol/L) dose-dependently decreased the intracellular levels of total cholesterol (TC) and triglyceride (TG) in FFA-treated primary rat hepatocytes and human HepG2 cell lines in vitro...
January 18, 2018: Acta Pharmacologica Sinica
D G Semaan, J O Igoli, L Young, A I Gray, E G Rowan, E Marrero
BACKGROUND AND PURPOSE: Based on ethno-botanical information collected from diabetic patients in Cuba and firstly reported inhibition of PTP1B and DPPIV enzymes activities, Allophylus cominia (A. cominia) was identified as possible source of new drugs that could be used for the treatment of type 2 diabetes mellitus (T2-DM). EXPERIMENTAL APPROACH: in this study, the activity of the characterised extracts from A. cominia was tested on the glucose uptake using HepG2 and L6 cells, 3T3-L1 fibroblasts and adipocytes as well as their effect on the fat accumulation using 3T3-L1 adipocytes...
January 12, 2018: Journal of Ethnopharmacology
Fu-Chih Chen, Kuo-Ping Shen, Jin-Bor Chen, Hui-Li Lin, Chi-Long Hao, Hsueh-Wei Yen, Shyh-Yu Shaw
Pre-germinated brown rice (PGBR) could ameliorate metabolic syndrome, however, not much research estimates the effect of PGBR extract on insulin resistance. The aim of this study is to examine the effects of PGBR extract in TNF-α induced insulin resistance. HepG2 cells, hepatocytes, were cultured in DMEM medium and added with 5 μM insulin or with insulin and 30 ng/ml TNF-α or with insulin, TNF-α and PGBR extract (50, 100, 300 μg/ml). The glucose levels of the medium were decreased by insulin, demonstrating insulin promoted glucose uptake into cell...
January 2018: Kaohsiung Journal of Medical Sciences
Mehri Jamilian, Azadeh Shojaei, Mansooreh Samimi, Faraneh Afshar Ebrahimi, Esmat Aghadavod, Maryam Karamali, Mohsen Taghizadeh, Hamidreza Jamilian, Somayeh Alaeinasab, Sadegh Jafarnejad, Zatollah Asemi
OBJECTIVE: The aim of this study was to evaluate the effects of omega-3 and vitamin E co-supplementation on parameters of mental health and gene expression related to insulin and inflammation in subjects with polycystic ovary syndrome (PCOS). METHODS: Forty PCOS women were allocated into two groups and treated with 1000mg omega-3 fatty acids plus 400 IU vitamin E supplements (n = 20) or placebo (n = 20) per day for 12 weeks. Parameters of mental health were recorded at baseline and after the 12-week intervention...
December 28, 2017: Journal of Affective Disorders
Ye Tian, Dai Heng, Kaili Xu, Wenbo Liu, Xuechun Weng, Xusong Hu, Cheng Zhang
Nitric oxide (NO) is a multifunctional gaseous molecule that plays important roles in mammalian reproductive functions including follicular growth and development. Although our previous study showed that NO mediated 3,5,3'-triiodothyronine (T3) and follicle-stimulating hormone (FSH)-induced granulosa cell development via upregulation of GLUT1 (glucose transporter protein ) and GLUT4 in granulosa cells, little is known about the precise mechanisms regulating ovarian development via glucose. The objective of the present study was to determine the cellular and molecular mechanism by which NO regulates GLUT expression and glucose uptake in granulosa cells...
December 28, 2017: Endocrinology
Kaitlyn Beyfuss, David A Hood
BACKGROUND: p53 is a tumor suppressor protein involved in regulating a wide array of signaling pathways. The role of p53 in the cell is determined by the type of imposed oxidative stress, its intensity and duration. The last decade of research has unravelled a dual nature in the function of p53 in mediating the oxidative stress burden. However, this is dependent on the specific properties of the applied stress and thus requires further analysis. METHODS: A systematic review was performed following an electronic search of Pubmed, Google Scholar, and ScienceDirect databases...
January 3, 2018: Redox Report: Communications in Free Radical Research
Hiroshi Nakamura, Tomohiro Ichikawa, Shoko Nakasone, Tomohiro Miyoshi, Masato Sugano, Motohiro Kojima, Satoshi Fujii, Atsushi Ochiai, Takeshi Kuwata, Keiju Aokage, Kenji Suzuki, Masahiro Tsuboi, Genichiro Ishii
OBJECTIVES: Carbonic anhydrase IX (CAIX) is a marker of hypoxia and its expression by cancer associated fibroblasts (CAFs) was reportedly associated with the poor prognosis of lung adenocarcinoma. This study aimed to characterize the hypoxic microenvironment containing CAIX (+) CAFs. MATERIALS AND METHODS: First, we evaluated the clinicopathological significance of CAIX expression by CAFs in 3cm and above lung adenocarcinoma (n=188). We then compared the expressions of E-cadherin, ezrin, ALDH-1, CD44, EGFR, HSF-1, Glut-1, and PD-L1 in cancer cells, as well as those of CD204 and podoplanin in stromal cells between CAIX (+) CAFs and CAIX (-) CAFs cases (n=25, each)...
January 2018: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
M Rijnsburger, U A Unmehopa, L Eggels, M J Serlie, S E la Fleur
OBJECTIVES: The hypothalamus lies adjacent to the third ventricle and is in close proximity with the median eminence (ME), a circumventricular organ with an incomplete blood-brain barrier (BBB) which controls direct entry of nutrients into the brain. The blood-CSF barrier of the hypothalamus shows dynamic changes upon neuroendocrine events and adjusts permeability with the tight junction (TJ) complex. It has been shown that chronic exposure to a high-fat diet (HFD) affects BBB permeability...
December 29, 2017: Nutritional Neuroscience
Dong Deng, Nieng Yan
Overexpression, purification, and crystallization of eukaryotic membrane proteins represent a major challenge for structural biology. In recent years, we have solved the crystal structures of the human glucose transporters GLUT1 in the inward-open conformation at 3.17 Å resolution and GLUT3 in the outward-open and occluded conformations at 2.4 and 1.5 Å resolutions, respectively. Structural elucidation of these transporters in three distinct functional states reveal the molecular basis for the alternating access transport cycle of this prototypal solute carrier family...
2018: Methods in Molecular Biology
David Álvarez-Cilleros, María Ángeles Martín, Sonia Ramos
SCOPE: (-)-Epicatechin (EC) and main colonic phenolic acids derived from flavonoid intake, such as 2,3-dihydroxybenzoic acid (DHBA), 3,4-dihydroxyphenylacetic acid (DHPAA), 3-hydroxyphenylpropionic acid (HPPA), and vanillic acid (VA), have been suggested to exert beneficial effects in diabetes, although the mechanism for their actions remains unknown. In this study, the modulation of glucose homeostasis and insulin signaling by the mentioned compounds on renal proximal tubular NRK-52E cells is investigated...
February 2018: Molecular Nutrition & Food Research
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