scholarly journals Maternal Protein Restriction Alters Histone Modifications and Glucose Transporter 4 (GLUT4) Expression in Female Rat Skeletal Muscle during Postnatal Development

2009 ◽  
Vol 23 (S1) ◽  
Author(s):  
Shasha Zheng ◽  
Michelle Unander ◽  
Yuanxiang Pan
Keyword(s):  
Skeletal Muscle ◽  
Postnatal Development ◽  
Histone Modifications ◽  
Glucose Transporter ◽  
Protein Restriction ◽  
Female Rat ◽  
Glucose Transporter 4 ◽  
Rat Skeletal Muscle ◽  
Glut4 Expression ◽  
Maternal Protein Restriction

Abnormal glucose homeostasis in adult female rat offspring after intrauterine ethanol exposure

2007 ◽  
Vol 292 (5) ◽  
pp. R1926-R1933 ◽  
Author(s):  
Xing-Hai Yao ◽  
B. L. Grégoire Nyomba
Keyword(s):  
Skeletal Muscle ◽  
Glucose Tolerance ◽  
Adult Female ◽  
Insulin Signaling ◽  
Glucose Transporter ◽  
Female Offspring ◽  
Female Rat ◽  
Glucose Transporter 4 ◽  
Insulin Resistant ◽  
Rat Offspring

Adverse events during pregnancy, including prenatal ethanol (EtOH) exposure, are associated with insulin-resistant diabetes in male rat offspring, but it is unclear whether this is true for female offspring. We investigated whether prenatal EtOH exposure alters glucose metabolism in adult female rat offspring and whether this is associated with reduced in vivo insulin signaling in skeletal muscle. Female Sprague-Dawley rats were given EtOH, 4 g·kg−1·day−1 by gavage throughout pregnancy. Glucose tolerance test and hyperinsulinemic euglycemic clamp were performed, and insulin signaling was investigated in skeletal muscle, in adult female offspring. We gave insulin intravenously to these rats and determined the association of glucose transporter-4 with plasma membranes, as well as the phosphorylation of phosphoinositide-dependent protein kinase-1 (PDK1), Akt, and PKCζ. Although EtOH offspring had normal birth weight, they were overweight as adults and had fasting hyperglycemia, hyperinsulinemia, and reduced insulin-stimulated glucose uptake. After insulin treatment, EtOH-exposed rats had decreased membrane glucose transporter-4, PDK1, Akt, and PKCζ in the gastrocnemius muscle, compared with control rats. Insulin stimulation of PDK1, Akt, and PKCζ phosphorylation was also reduced. In addition, the expression of the protein tribbles-3 and the phosphatase enzyme activity of phosphatase and tensin homolog deleted on chromosome 10 (PTEN), which prevent Akt activation, were increased in muscle from EtOH-exposed rats. Female rat offspring exposed to EtOH in utero develop insulin-resistant diabetes in association with excessive PTEN and tribbles-3 signaling downstream of the phosphatidylinositol 3-kinase pathway in skeletal muscle, which may be a mechanism for the abnormal glucose tolerance.

Effect of M35, a neuropeptide galanin antagonist on glucose uptake translated by glucose transporter 4 in trained rat skeletal muscle

2009 ◽  
Vol 467 (2) ◽  
pp. 178-181 ◽  
Author(s):  
Lei Jiang ◽  
Mingyi Shi ◽  
Lili Guo ◽  
Biao He ◽  
Guangzhi Li ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Glucose Uptake ◽  
Glucose Transporter ◽  
Glucose Transporter 4 ◽  
Rat Skeletal Muscle

scholarly journals High Leptin Levels Acutely Inhibit Insulin-Stimulated Glucose Uptake without Affecting Glucose Transporter 4 Translocation in L6 Rat Skeletal Muscle Cells

Endocrinology ◽  
2001 ◽  
Vol 142 (11) ◽  
pp. 4806-4812 ◽  
Author(s):  
Gary Sweeney ◽  
Jessica Keen ◽  
Romel Somwar ◽  
Daniel Konrad ◽  
Rami Garg ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Glucose Uptake ◽  
Glucose Transporter ◽  
Muscle Cells ◽  
Skeletal Muscle Cells ◽  
Glucose Transporter 4 ◽  
Rat Skeletal Muscle

scholarly journals Insulin Regulation and Selective Segregation with Glucose Transporter-4 of the Membrane Aminopeptidase vp165 in Rat Skeletal Muscle Cells1

Endocrinology ◽  
1997 ◽  
Vol 138 (3) ◽  
pp. 1029-1034 ◽  
Author(s):  
Satoru Sumitani ◽  
Toolsie Ramlal ◽  
Romel Somwar ◽  
Susanna R. Keller ◽  
Amira Klip
Keyword(s):  
Skeletal Muscle ◽  
Glucose Transporter ◽  
Glucose Transporter 4 ◽  
Rat Skeletal Muscle ◽  
Insulin Regulation

scholarly journals Antidiabetic and Antihyperlipidemic Effects ofClitocybe nudaon Glucose Transporter 4 and AMP-Activated Protein Kinase Phosphorylation in High-Fat-Fed Mice

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Mei-Hsing Chen ◽  
Cheng-Hsiu Lin ◽  
Chun-Ching Shih
Keyword(s):  
Skeletal Muscle ◽  
Protein Kinase ◽  
Glucose Transporter ◽  
Body Weight Gain ◽  
Glucose Production ◽  
Hypolipidemic Effect ◽  
Glucose Transporter 4 ◽  
High Fat ◽  
Hepatic Expression ◽  
Amp Activated Protein Kinase

The objective of this study was to evaluate the antihyperlipidemic and antihyperglycemic effects and mechanism of the extract ofClitocybe nuda(CNE), in high-fat- (HF-) fed mice. C57BL/6J was randomly divided into two groups: the control (CON) group was fed with a low-fat diet, whereas the experimental group was fed with a HF diet for 8 weeks. Then, the HF group was subdivided into five groups and was given orally CNE (including C1: 0.2, C2: 0.5, and C3: 1.0 g/kg/day extracts) or rosiglitazone (Rosi) or vehicle for 4 weeks. CNE effectively prevented HF-diet-induced increases in the levels of blood glucose, triglyceride, insulin (P<0.001,P<0.01,P<0.05, resp.) and attenuated insulin resistance. By treatment with CNE, body weight gain, weights of white adipose tissue (WAT) and hepatic triacylglycerol content were reduced; moreover, adipocytes in the visceral depots showed a reduction in size. By treatment with CNE, the protein contents of glucose transporter 4 (GLUT4) were significantly increased in C3-treated group in the skeletal muscle. Furthermore, CNE reduces the hepatic expression of glucose-6-phosphatase (G6Pase) and glucose production. CNE significantly increases protein contents of phospho-AMP-activated protein kinase (AMPK) in the skeletal muscle and adipose and liver tissues. Therefore, it is possible that the activation of AMPK by CNE leads to diminished gluconeogenesis in the liver and enhanced glucose uptake in skeletal muscle. It is shown that CNE exhibits hypolipidemic effect in HF-fed mice by increasing ATGL expression, which is known to help triglyceride to hydrolyze. Moreover, antidiabetic properties of CNE occurred as a result of decreased hepatic glucose production via G6Pase downregulation and improved insulin sensitization. Thus, amelioration of diabetic and dyslipidemic states by CNE in HF-fed mice occurred by regulation of GLUT4, G6Pase, ATGL, and AMPK phosphorylation.

Regulation of glucose transporter GLUT-4 and hexokinase II gene transcription by insulin and epinephrine

1997 ◽  
Vol 273 (4) ◽  
pp. E682-E687 ◽  
Author(s):  
Jared P. Jones ◽  
G. Lynis Dohm
Keyword(s):  
Skeletal Muscle ◽  
Gene Transcription ◽  
Glucose Transporter ◽  
Male Rats ◽  
Rat Skeletal Muscle ◽  
Hexokinase Ii ◽  
Epinephrine Infusion ◽  
Glut 4 ◽  
Gastrocnemius Muscles

Transport of glucose across the plasma membrane by GLUT-4 and subsequent phosphorylation of glucose by hexokinase II (HKII) constitute the first two steps of glucose utilization in skeletal muscle. This study was undertaken to determine whether epinephrine and/or insulin regulates in vivo GLUT-4 and HKII gene transcription in rat skeletal muscle. In the first experiment, adrenodemedullated male rats were fasted 24 h and killed in the control condition or after being infused for 1.5 h with epinephrine (30 μg/ml at 1.68 ml/h). In the second experiment, male rats were fasted 24 h and killed after being infused for 2.5 h at 1.68 ml/h with saline or glucose (625 mg/ml) or insulin (39.9 μg/ml) plus glucose (625 mg/ml). Nuclei were isolated from pooled quadriceps, tibialis anterior, and gastrocnemius muscles. Transcriptional run-on analysis indicated that epinephrine infusion decreased GLUT-4 and increased HKII transcription compared with fasted controls. Both glucose and insulin plus glucose infusion induced increases in GLUT-4 and HKII transcription of twofold and three- to fourfold, respectively, compared with saline-infused rats. In conclusion, epinephrine and insulin may regulate GLUT-4 and HKII genes at the level of transcription in rat skeletal muscle.

Nitric oxide increases GLUT4 expression and regulates AMPK signaling in skeletal muscle

2007 ◽  
Vol 293 (4) ◽  
pp. E1062-E1068 ◽  
Author(s):  
Vitor A. Lira ◽  
Quinlyn A. Soltow ◽  
Jodi H. D. Long ◽  
Jenna L. Betters ◽  
Jeff E. Sellman ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Skeletal Muscle ◽  
Glucose Transporter ◽  
No Donor ◽  
Ampk Signaling ◽  
L6 Myotubes ◽  
Glut4 Expression ◽  
Compound C ◽  
Cgmp Analog

Nitric oxide (NO) and 5′-AMP-activated protein kinase (AMPK) are involved in glucose transport and mitochondrial biogenesis in skeletal muscle. Here, we examined whether NO regulates the expression of the major glucose transporter in muscle (GLUT4) and whether it influences AMPK-induced upregulation of GLUT4. At low levels, the NO donor S-nitroso- N-penicillamine (SNAP, 1 and 10 μM) significantly increased GLUT4 mRNA (∼3-fold; P < 0.05) in L6 myotubes, and cotreatment with the AMPK inhibitor compound C ablated this effect. The cGMP analog 8-bromo-cGMP (8-Br-cGMP, 2 mM) increased GLUT4 mRNA by ∼50% ( P < 0.05). GLUT4 protein expression was elevated 40% by 2 days treatment with 8-Br-cGMP, whereas 6 days treatment with 10 μM SNAP increased GLUT4 expression by 65%. Cotreatment of cultures with the guanylyl cyclase inhibitor 1H-[1,2,4]oxadiazolo[4,3,-a]quinoxalin-1-one prevented the SNAP-induced increase in GLUT4 protein. SNAP (10 μM) also induced significant phosphorylation of α-AMPK and acetyl-CoA carboxylase and translocation of phosphorylated α-AMPK to the nucleus. Furthermore, L6 myotubes exposed to 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR) for 16 h presented an approximately ninefold increase in GLUT4 mRNA, whereas cotreatment with the non-isoform-specific NOS inhibitor NG-nitro-l-arginine methyl ester, prevented ∼70% of this effect. In vivo, GLUT4 mRNA was increased 1.8-fold in the rat plantaris muscle 12 h after AICAR injection, and this induction was reduced by ∼50% in animals cotreated with the neuronal and inducible nitric oxide synthases selective inhibitor 1-(2-trifluoromethyl-phenyl)-imidazole. We conclude that, in skeletal muscle, NO increases GLUT4 expression via a cGMP- and AMPK-dependent mechanism. The data are consistent with a role for NO in the regulation of AMPK, possibly via control of cellular activity of AMPK kinases and/or AMPK phosphatases.

Thyroid Hormone Increases Muscle/Fat Glucose Transporter Gene Expression in Rat Skeletal Muscle*

Endocrinology ◽  
1991 ◽  
Vol 129 (1) ◽  
pp. 455-464 ◽  
Author(s):  
STEVEN P. WEINSTEIN ◽  
JULIE WATTS ◽  
RICHARD S. HABER
Keyword(s):  
Gene Expression ◽  
Skeletal Muscle ◽  
Thyroid Hormone ◽  
Glucose Transporter ◽  
Transporter Gene ◽  
Rat Skeletal Muscle
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