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GLUT 1 (Glucose Transporter), Hep G2 type Transporter, 42_45 kD, Rabbit anti_Human, Mouse, Rat, Rabbit; WB_IP_ELISA

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[#OBT1747] GLUT 1 (Glucose Transporter), Hep G2 type Transporter, 42_45 kD, Rabbit anti_Human, Mouse, Rat, Rabbit; WB_IP_ELISA


OBT1747 | GLUT 1 (Glucose Transporter), Hep G2 type Transporter, 42_45 kD, Rabbit anti_Human, Mouse, Rat, Rabbit; WB_IP_ELISA, 50 µg.
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(1) Immunohistochemical expressionof sodium-dependent glucose transporter - 2 (SGLT-2) in clear cell renal carcinoma: possible prognostic implications.[TOP]

Pubmed ID :30521176
Publication Date : //
Glucose is a major energy resource for tumor cell survival and growth, and its influx into cells is mainly carried out by facilitative glucose transporters (GLUTs). Sodium - dependent glucose transporters (SGLTs) have been highlighted as playing important roles in diabetic treatment. However, their potential roles in cancer remain unclear. We examined expression patterns of SGLTs in tumor tissues together with conventional pathological variables to determine prognostic significance in patients with renal cell carcinoma (RCC).

Authors : Kobayashi Minoru, Uematsu Toshitaka, Tokura Yuumi, Takei Kohei, Sakamoto Kazumasa, Narimatsu Takahiro, Nukui Akinori, Kamai Takao,

(2) Glucose-installed biodegradable polymeric micelles for cancer-targeted drug delivery system: synthesis, characterization and in vitro evaluation.[TOP]

Pubmed ID :30506149
Publication Date : //
Glucose metabolism of cancer can be used as a strategy to target cancer cells which exhibit altered glycolytic rate. The facilitated glucose transporter (Glut) plays an important role in enhancement glycolytic rate resulting in increased glucose uptake into cancer cells. FGD-PET image is an example for using Glut as a targeting to diagnose the high glycolytic rate of tumor. Thus, Glut may be adapted to target cancer cells for drug delivery system. Herein, biodegradation polymeric micelles target cancer cells by Glut was fabricated. The amphiphilic block copolymer of poly(ethylene glycol)-block-poly(ε-caprolactone) (PEG-b-PCL) was synthesized where terminal group of the PEG chain was installed with glucose molecules. The H-NMR confirmed the existence of glucose moiety from two distinct peaks (5.2 and 4.7 ppm) of protons at anomeric carbon of glucose. Glucose-PEG-b-PCL spontaneously forms micelles in an aqueous solution. The size and zeta potential were 22 nm and -7 mv, respectively. Glucose-micelles have high stability, and no evidence of cytotoxicity was found after incubation for 7 days. Doxorubicin, used as a fluorescent probe, was loaded into glucose-micelles. The enhanced amount of doxorubicin as a result of glucose-micelles in PC-3, MCF-7 and HepG2 was evaluated by fluorescence microscopy and flow cytometer. Glucose molecules on the surface of micelles increased internalization and enhanced uptake of micelles via bypassing endocytosis pathway. These results show the use of glucose as a targeting ligand on the micelle surface to target cancer cells via Glut.

Authors : Theerasilp Man, Chalermpanapun Punlop, Sunintaboon Panya, Sungkarat Witaya, Nasongkla Norased,

(3) Blood Vessels and Perivascular Phagocytes of Prefrontal White and Gray Matter in Suicide.[TOP]

Pubmed ID :30496451
Publication Date : //
Inflammatory processes may contribute to psychiatric disorders and suicide. Earlier, we reported greater densities of perivascular phagocytes in dorsal prefrontal white matter (DPFWM) in suicide than in non-suicide deaths. To distinguish between greater vascularity and greater coverage of vessels by perivascular phagocytes, and to determine whether the excess of perivascular phagocytes is derived from microglia or from non-parenchymal immune cells, we made stereological estimates of vascular surface area density (AVTOTAL) by staining for glucose transporter Glut-1, and the fraction of vascular surface area (AF) immunoreactive (IR) for CD163 (CD163 AF) in dorsal and ventral prefrontal white and gray matter. Manner of death or psychiatric diagnosis showed no association with CD163 AF in any region. Suicide was associated with a lower AVTOTAL compared with non-suicides in DPFWM (p = 0.018) but not with AVTOTAL in the 3 other regions of interest. Thus, the earlier observation of increased density of perivascular phagocytes in DPFWM after suicide cannot be attributed to infiltration by peripheral monocytes or to increased vascularity. Greater AVTOTAL ventrally than dorsally (p = 0.002) was unique to suicide and white matter.

Authors : Schnieder Tatiana P, Zhou Qin Isaiah D, Trencevska-Ivanovska Iskra, Rosoklija Gorazd, Stankov Aleksandar, Pavlovski Goran, Mann J John, Dwork Andrew J,

(4) Inhibition of GLUT-1 expression and the PI3K/Akt pathway to enhance the chemosensitivity of laryngeal carcinoma cells in vitro.[TOP]

Pubmed ID :30464533
Publication Date : //
The mechanism of chemoresistance remains unknown. Here, we investigated if glucose transporter-1 (GLUT-1) and PI3K/Akt pathways are associated with the sensitivity to cisplatin in Hep-2 laryngeal carcinoma cells and whether the inhibition of GLUT-1 and the PI3K/Akt pathways enhances the chemosensitivity of Hep-2 cells.

Authors : Jiang Tao, Zhou Min-Li, Fan Jun,

(5) Triiodothyronine improves age-induced glucose intolerance and increases the expression of sirtuin-1 and glucose transporter-4 in skeletal muscle of aged rats.[TOP]

Pubmed ID :30431435
Publication Date : //
To evaluate the potential beneficial impact and to clarify the underlying mechanisms of triiodothyronine (T3) on glucose intolerance in aged rats. Rats were divided into adult group, aged group, and T3-treated aged group (T3-aged). T3 was administered at a dose of 8 µg/kg body weight for 2 weeks. In comparison to adult group, aged rats presented significant higher levels of fasting insulin and homeostatic model assessment of insulin resistance (HOMA-IR). Glucose area under the curve (AUC), and peak glycemia, estimated from oral glucose tolerance curve, were significantly increased along with decreased mRNA expression of skeletal muscle sirtuin-1, glucose transporter-4 (GLUT-4) and uncoupling protein-3 (UCP-3) in aged versus adult group. T3 administration significantly decreased the serum levels of fasting insulin, HOMA-IR, glucose AUC, and peak glycemia in T3-aged versus aged rats. Skeletal muscle mRNA expression of sirtuin-1 and GLUT-4 were increased, whereas UCP-3 was not changed by T3 administration. T3 administration improved glucose intolerance, and decreased insulin resistance in aged rats. This was associated with upregulation of skeletal muscle sirtuin-1 and GLUT-4 which could mediate such beneficial effect.

Authors : El Agaty Sahar M,

(6) Study of the accumulation and distribution of arsenic species and association with arsenic toxicity in rats after 30 days of oral realgar administration.[TOP]

Pubmed ID :30385423
Publication Date : //
Realgar (AsS) has been traditionally incorporated as a chief ingredient in traditional Chinese medicine formulations used to treat inflammation, poisoning, cancer, convulsion, and parasites. However, because of the toxicity of arsenic (As), the safety of realgar has been questioned.

Authors : Yi Yan, Gao Shuang-Rong, Xia Jing, Li Chun-Ying, Zhao Yong, Zhang Yu-Shi, Liang Ai-Hua, Shen-Ji ,

(7) Metabolomic Profiling Reveals That Reprogramming of Cerebral Glucose Metabolism Is Involved in Ischemic Preconditioning-Induced Neuroprotection in a Rodent Model of Ischemic Stroke.[TOP]

Pubmed ID :30362349
Publication Date : //
Ischemic tolerance renders the brain resistant to ischemia-reperfusion (I/R) injury as a result of the activation of endogenous adaptive responses triggered by various types of preconditioning. The complex underlying metabolic mechanisms responsible for the neuroprotection of cerebral ischemic preconditioning (IPC) remain elusive. Herein, gas chromatography-mass spectrometry (GC-MS) technique was applied to delineate the dynamic changes of brain metabolome in a rodent model of ischemic stroke (transient occlusion of the middle cerebral artery, tMCAO), alone or after pretreatment with nonlethal ischemic tolerance induction (transient occlusion of the bilateral common carotid arteries, tBCCAO). Metabolomic analysis showed that accumulation of glucose (concentration increased more than 4 fold) and glycolytic intermediates is the prominent feature of brain I/R-induced metabolic disturbance. IPC attenuated brain I/R damage by subduing postischemic hyperglycolysis, increasing the pentose phosphate pathway (PPP) flux and promoting the utilization of β-hydroxybutyrate. The expression analysis of pivotal genes and proteins involved in relevant metabolic pathways revealed that the downregulation of AMP-activated protein kinase (AMPK)-mediated glucose transporter-1 (GLUT-1) and 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase-3 (PFKFB3) and reduced mRNA levels of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (NOX) subunits were associated with IPC-induced metabolic flexibility, which allows the brain to be more capable of withstanding severe I/R insults. The present study provided mechanistic insights into the metabolic signature of IPC and indicated that adaptively modulating brain glucose metabolism could be an effective approach for the therapeutic intervention of ischemic stroke.

Authors : Geng Jianliang, Zhang Yue, Li Sijia, Li Shuning, Wang Jiankun, Wang Hong, Aa Jiye, Wang Guangji,

(8) Low-carbohydrate high-protein diet diminishes the insulin response to glucose load via suppression of SGLT-1 in mice.[TOP]

Pubmed ID :30355268
Publication Date : //
The purpose of this study was to examine the effects of a low-carbohydrate high-protein (LCHP) diet on the expression of glucose transporters and their relationships to glucose metabolism. Male C57BL/6 mice were fed a normal control or LCHP diet for 2 weeks. An oral glucose tolerance test and insulin tolerance test (ITT) were performed, and the expression of glucose transporters was determined in the gastrocnemius muscle, jejunum and pancreas. The increase in plasma insulin concentrations after glucose administration was reduced in the LCHP group. However, LCHP diet had no effects on peripheral insulin sensitivity or glucose transporters expression in the gastrocnemius and pancreas. Soluble glucose transporter (SGLT)-1 protein content in jejunum was lower in the LCHP group. Taken together, these results suggest that the blunted insulin response after glucose administration in LCHP diet-fed mice might be due to decreased SGLT-1 expression, but not to an increase in peripheral insulin sensitivity. Abbreviations: LCHP: low-carbohydrate high-protein; ITT: insulin tolerance test; GLUT: glucose transporter; SGLT: soluble glucose transporter; OGTT: oral glucose tolerance test; AUC: area under the curve.

Authors : Higashida Kazuhiko, Terada Shin, Li Xi, Inoue Sachika, Iida Noriko, Kitai Saki, Nakai Naoya,

(9) Leptin and its receptor in glucose metabolism of T-cell lymphoma.[TOP]

Pubmed ID :30333864
Publication Date : //
T-cell lymphoma (TCL) is a group of heterogeneous disorders with a poor response to conventional treatment. In order to identify novel therapeutic targets, the present study investigated the effect of leptin and its receptor on glucose metabolism in TCL. The expression of the leptin receptor (ObR), and glucose transporter (Glut)1 and 4 was detected in TCL and reactive lymphoid hyperplasia (RLH) tissues by immunohistochemical analysis. A higher level of ObR expression was observed in the TCL tissues than in the RLH tissues (58.3 vs. 22.2%; P=0.012), and ObR overexpression was associated with high expression of Glut1 (P=0.007). analysis using the human TCL MOLT-3 cell line demonstrated that leptin stimulated cell glucose uptake via promoting recruitment and expression of Glut1, effects which were abolished by ObR-specific small interfering RNA (siRNA). Additionally, MOLT-3 cell viability was also increased following leptin treatment. ObR-specific siRNA abolished these responses. In conclusion, these results suggested that leptin serves a critical role in TCL glucose uptake via the ObR.

Authors : Han Tian-Jie, Xu Hong-Zhi, Li Jun-Shan, Geng Ling-Yun, Li Xin-Yu, Zhou Xiang-Xiang, Wang Xin,

(10) Allyl methyl sulfide, a garlic active component mitigates hyperglycemia by restoration of circulatory antioxidant status and attenuating glycoprotein components in streptozotocin-induced experimental rats.[TOP]

Pubmed ID :30318971
Publication Date : //
Diabetes is a major noncommunicable life-threatening chronic and pervasive condition that is consuming the world health in a petrifying rate. The circulatory system is one of the major sources of hyperglycemia-induced ROS generation. Historically, garlic has been revered as part of a healthful diet. Organosulfur compounds have been attributed to the medicinal properties and health benefits of garlic. The present study focuses on the ameliorative role of allyl methyl sulfide (AMS) in combating diabetic complications in diabetic rats. Male Wistar rats were randomly divided into four groups. Experimental diabetes was induced by a single intraperitoneal injection (i.p), of streptozotocin (STZ) (40 mg/kg b.w). STZ treated diabetic rats showed significant augment in plasma glucose level, lipidperoxidative (LPO) markers, glycoprotein components (hexose, hexosamine, sialic acid, and fucose), and significant decline in plasma insulin level, nonenzymatic antioxidants and activities of antioxidant enzymes in the circulatory system and tissues. Further, periodic acid-Schiff (PAS) staining of hepatic and renal tissues revealed positive stain accumulation and Western blot investigation of glucose transporter 2 (GLUT 2) in pancreas of STZ-induced hyperglycemic rats. Dietary intervention with AMS (100 mg/kg b.w) for 30 days demonstrated significant protective effects on all the biochemical parameters studied. Besides, biochemical findings were corroborated by histological exertion and Western blot study. The findings of current investigations recommended that AMS can ameliorate the consequences of diabetes due to their antioxidant efficacy and can be used as a potential therapeutic approach. Further studies are warranted to explore the clinical application of AMS.

Authors : Sujithra Kathiroli, Srinivasan Subramani, Indumathi Dhananjayan, Vinothkumar Veerasamy,