scholarly journals Effects of exogenous lactate administration on fat metabolism and glycogen synthesis factors in rats

2020 ◽  
Vol 24 (2) ◽  
pp. 1-5 ◽  
Author(s):  
Sunghwan Kyun ◽  
Choongsung Yoo ◽  
Takeshi Hashimoto ◽  
Hironori Tomi ◽  
Noboru Teramoto ◽  
...  
Keyword(s):  
Glycogen Synthesis ◽  
Fat Metabolism

Docosahexaenoic and eicosapentaenoic fatty acids differentially regulate glucose and fatty acid metabolism in L6 rat skeletal muscle cells

2020 ◽  
Vol 319 (6) ◽  
pp. C1120-C1129
Author(s):  
Glen Katsnelson ◽  
Rolando B. Ceddia
Keyword(s):  
Skeletal Muscle ◽  
Fatty Acids ◽  
Protein Kinase ◽  
Glycogen Synthase ◽  
Glycogen Synthesis ◽  
Fat Metabolism ◽  
Muscle Cells ◽  
Skeletal Muscle Cells ◽  
Glucose Disposal ◽  
Anti Inflammatory

The objective of this study was to investigate whether the n-3 polyunsaturated fatty acids (PUFAs) docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) can directly regulate glucose and fat metabolism in skeletal muscle besides exerting anti-inflammatory effects. To accomplish this, L6 skeletal muscle cells were treated with 50 µM of either DHA or EPA for 1, 3, and 5 days. Here, we report that basal and insulin-stimulated rates of glucose uptake, glycogen synthesis, protein kinase B (AKT), and glycogen synthase kinase 3 (GSK3) phosphorylation were not affected by DHA or EPA. However, glucose and palmitate oxidation were consistently elevated by DHA treatment, whereas EPA only increased this variable transiently. Similarly, only DHA caused significant and sustained increases in AMP-activated protein kinase (AMPK) phosphorylation and protein levels of carnitine-palmitoyl transferase-1b (CPT1b) and peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α) in skeletal muscle cells. DHA also caused a larger anti-inflammatory effect than EPA in these cells. In conclusion, besides exerting anti-inflammatory effects, DHA and EPA directly regulated glucose and fat metabolism in skeletal muscle cells, although DHA was more effective in doing so than EPA. Thus, by directly enhancing glucose and fat oxidation, DHA may increase glucose disposal and reduce intramyocellular lipid accumulation.

Distribution of newly formed hepatic glycogen in adrenalectomized rats as observed by radioautography after injection of 3H-galactose

1984 ◽  
Vol 42 ◽  
pp. 228-229
Author(s):  
J. E. Michaels ◽  
J. T. Hung ◽  
E. L. Cardell ◽  
R. R. Cardell
Keyword(s):  
Glycogen Synthesis ◽  
Hepatic Glycogen ◽  
Electron Microscopic ◽  
Routine Procedures ◽  
Silver Grains ◽  
Synthetic Glucocorticoid ◽  
Adrenalectomized Rats

In order to study early events of glycogen synthesis, we have used adrenalectomized (ADX) rats fasted overnight and injected with the synthetic glucocorticoid dexamethasone (DEX) to stimulate glycogen synthesis. Rats were given DEX 0-5 hr prior to sacrifice and injected with 2 mCi 3H-galactose 1 hr prior to sacrifice. Liver was prepared for light (LM) and electron microscopic (EM) radioautography by routine procedures.The concentration of silver grains over hepatic cytoplasm was measured in LM radioautographs using a Zeiss Videoplan. The hepatocytes were categorized as unlabeled if no silver grains (gr) were present, lightly labeled (<10gr/100 μm2 cytoplasm) or intensely labeled (>10 gr/1002 μm cytoplasm). Although very few hepatocytes showed heavy labeling after 1 hr treatment with DEX, by 2 hr after DEX treatment 8% of the cells distributed throughout the lobule were intensely labeled.

3H-galactose and 3H-glucose incorporation into newly synthesized hepatic glycogen in control-fed rats

1986 ◽  
Vol 44 ◽  
pp. 292-293
Author(s):  
J.E. Michaels ◽  
S.A. Garfield ◽  
J.T. Hung ◽  
S.S. Smith ◽  
R.R. Cardell
Keyword(s):  
Biochemical Analysis ◽  
Glycogen Synthesis ◽  
Hepatic Glycogen ◽  
Electron Microscopic ◽  
Once Daily ◽  
Tail Vein ◽  
Tracer Dose ◽  
Glucose Incorporation ◽  
Wet Weight

3H-galactose (gal) and 3H-glucose (glu) were compared to determine which compound was preferable for pulse labeling newly formed hepatic glycogen. Control fed rats were used to achieve substantial and consistent levels of hepatic glycogen and to stimulate glycogen synthesis.Rats fed once daily for 4 hr achieved hepatic glycogen levels > 3% wet weight liver prior to injection by tail vein of a tracer dose of 3H-gal or 3H-glu. The rats were sacrificed 15-120 min later and liver was prepared by routine techniques for light (LM) and electron microscopic (EM) radioautography (RAG) and biochemical analysis.

ÉTUDE IN VITRO DU MÉTABOLISME DES HYDRATES DE CARBONE DANS LE LEUCOCYTE CIRCULANT DU COBAYE TRAITÉ À LA CORTISONE

1966 ◽  
Vol 51 (2) ◽  
pp. 193-202
Author(s):  
J. A. Antonioli ◽  
A. Vannotti
Keyword(s):  
Glucose Concentration ◽  
Intramuscular Injection ◽  
Acute Inflammation ◽  
Glycogen Content ◽  
Glycogen Synthesis ◽  
Lactate Production ◽  
Glucose Consumption ◽  
List Type ◽  
Hydrates De Carbone

ABSTRACT 1. The metabolism of suspensions of circulating leucocytes has been studied after intramuscular injection of a dose of 50 mg/kg of a corticosteroid (cortisone acetate). The suspensions were incubated under aerobic conditions in the presence of a glucose concentration of 5.6 mm. Glucose consumption, lactate production, and variations in intracellular glycogen concentration were measured. After the administration of the corticosteroid, the anabolic processes of granulocyte metabolism were reversibly stimulated. Glucose consumption and lactate production increased 12 hours after the injection, but tended to normalize after 24 hours. The glycogen content of the granulocytes was enhanced, and glycogen synthesis during the course of the incubation was greatly stimulated. The action of the administered corticosteroid is more prolonged in females than in males. The injection of the corticosteroid caused metabolic modifications which resemble in their modulations and in their chronological development those found in circulating granulocytes of guinea-pigs suffering from sterile peritonitis. These results suggest, therefore, that, in the case of acute inflammation, the glucocorticosteroids may play an important role in the regulation of the metabolism of the blood leucocytes.

312-OR: Gender-Specific Effects on Hepatic Fat Metabolism in Type 2 Diabetes before and after Remission

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 312-OR
Author(s):  
AHMAD AL-MRABEH ◽  
SHADEN MELHEM ◽  
SVIATLANA V. ZHYZHNEUSKAYA ◽  
CARL PETERS ◽  
ALISON C. BARNES ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Fat Metabolism ◽  
Specific Effects ◽  
Before And After ◽  
Hepatic Fat ◽  
Gender Specific

Abnormal activation of glycogen synthesis in fibroblasts from NIDDM subjects. Evidence for an abnormality specific to glucose metabolism

Diabetes ◽  
1993 ◽  
Vol 42 (4) ◽  
pp. 583-589 ◽  
Author(s):  
A. M. Wells ◽  
I. C. Sutcliffe ◽  
A. B. Johnson ◽  
R. Taylor
Keyword(s):  
Glucose Metabolism ◽  
Glycogen Synthesis

The mechanism of action of Lipiburn on fat metabolism

10.2741/4726 ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 427-434
Author(s):  
A.Bakr M Rabie
Keyword(s):  
Mechanism Of Action ◽  
Fat Metabolism
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