March 10, 2024 23:16 / Last edited by tytizamde1981 5 months ago
The present study was conducted to determine the effect of chronic administration of the long-acting β2-adrenergic agonist clenbuterol on rats that are genetically prone to insulin resistance and impaired glucose tolerance. Obese Zucker rats (fa/fa) were given 1 mg/kg of clenbuterol by oral intubation daily for 5 wk. Controls received an equivalent volume of water according to the same . ->
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We here investigate the effects of two-weeks treatment with the β2-agonist clenbuterol (40 µg/day) on glucose control as well as energy- and substrate metabolism in healthy young men (age: 18-30 .
Clenbuterol ingestion induced a 17-29% increase in muscle mass but decreased citrate synthase activity by 34-42% and had no effect on muscle glucose uptake. Administration of clenbuterol to rats that exercise trained prevented the training-induced improvement in insulin-stimulated glucose uptake and attenuated the increases in citrate synthase .
Interestingly, SKM GLUT1 protein levels and glucose-induced SKM GLUT4 translocation to the plasma membrane were not significantly different between the two groups of mice (Fig. 3e and Supplementary Fig. S7a-c), indicating that the ability of clenbuterol to alter SKM metabolism and improve glucose tolerance is not due to enhanced GLUT1 (total .
In vitro and acute in vivo effects of clenbuterol. (a) Clenbuterol stimulation of L6 myotubes induced glucose uptake in a dose-dependent manner; n = 5-8; data were analysed by one-way ANOVA with Dunnett's multiple comparison test. (b, c) Stimulation of L6 myotubes stably expressing GLUT4myc with 1 μmol/l clenbuterol induces GLUT4 translocation as quantified in (c); n = 3; data were .
glucose levels in the clenbuterol-treated mice, the insulin- mediated decrease in blood glucose levels was similar to that in the control group (Fig. 1b and Supplementary Fig. 1b).
Clenbuterol administration caused pronounced improvements in glucose homeostasis and prevented the metabolic deficits in mouse models of β-cell dysfunction and insulin resistance. Studies with skeletal muscle-specific mutant mice demonstrated that these metabolic improvements required activation of skeletal muscle β 2 -adrenergic receptors .
Chronic clenbuterol treatment of WT mice increases glucose utilization in SKM in vivo Prior to metabolic testing, lean WT mice consumed drinking water containing clenbuterol (30 mg/l; clenb.
The current study aimed to evaluate whether clenbuterol, a β 2-adrenergic agonist, supplementation in Nile tilapia (Oreochromis niloticus) diets can influence growth and blood parameters. Besides, assessment of adipogenic genes as fatty acid synthase (FAS) and lipoprotein lipase (LPL) which is a key enzyme in the regulation of the flux of fatty acids in liver, muscle, and adipose tissue as .
Clenbuterol improved glucose tolerance after 4 days of treatment and these effects were maintained for up to 42 days. Effects were achieved with doses in a clinically relevant microgram range. Mechanistically, prolonged treatment with a low dose of clenbuterol improved glucose homeostasis in insulin ...
The effects of clenbuterol could be even more important in aged individuals with prefrontal cortical deficits, since glucose metabolism have been found to be decreased in the frontal and temporal lobes of aged humans and monkeys (De Santi et al. , 1995; Eberling et al. , 1997; Noda et al. , 2002).
Clenbuterol is a potent beta-2 agonist widely misused by professional athletes and bodybuilders. Information on clenbuterol associated adverse events is present in case reports and case series, though it may not be readily available. . Besides, it also affects the gene that is associated with glucose metabolism . Hyperglycemia with .
Two clenbuterol O-glucuronide diastereomers were synthesized by the Koenigs-Knorr reaction. Structures and glucuronidation sites of the glucuronides were characterized by tandem mass spectrometry and nuclear magnetic resonance spectroscopy. The two diastereomers were used as standard compounds in studies of stereoselective glucuronidation of .
The effect of clenbuterol on body composition and protein metabolism. As high doses of clenbuterol are well-known for their repartitioning effects on body composition . Nevertheless, in this study, we were unable to attribute the effects of clenbuterol on glucose uptake to an increased lean mass, as body weight- and composition remained .
Clenbuterol, fed for 1 wk, increased the wet weight of the gastrocnemius, soleus, and extensor digitorum longus muscles (15-23%) in both normal and D + I rats. Although clenbuterol increased body weight gain, it did not alter feed consumption and, therefore, feed efficiency (g gain/g food) was improved. . Blood Glucose / metabolism Body .
Thus, the most likely scenario is that the clenbuterol-stimulated increase in glucose metabolism drives glucose uptake into SKM. To further test this hypothesis, we measured the glycolysis rate in .
Prolonged supplementation with the β 2-agonist clenbuterol improves glucose homeostasis in diabetic rodents, likely via β 2-adrenoceptor (β 2-AR)-mediated effects in the skeletal muscle and liver. However, since rodents have, in contrast to-especially diabetic-humans, substantial quantities of brown adipose tissue (BAT) and clenbuterol has affinity to β 1 - and β 3-ARs, the contribution of .
We here investigate the effects of two-weeks treatment with the β 2 -agonist clenbuterol (40 µg/day) on glucose control as well as energy- and substrate metabolism in healthy young men (age: 18 .
Glucose Metabolism in Clen-Treated Hearts In this study, we found changes in carbohydrate contribution to cardiac oxidative metabolism after chronic treatment with Clen. Although our data could not provide exact details, such as the relative contribution of glucose, pyruvate, and lactate, general finding of increased contribution of .
metabolism and glucose homeostasis following heat stress-induced IUGR. Our objective was to test this hypothesis by determining whether daily intramuscular injection of the 2 adrenergic agonist, clenbuterol HCl, would improve skeletal muscle glucose metabolism, pancreatic cell function, and lipid homeostasis in IUGR juvenile lambs. 2.
To compensate, skeletal and cardiac muscle may become more reliant on glycolytic metabolism, as clenbuterol increased GLUT4 protein and glucose transport , the activities of glycolytic enzymes (35, 49, 53), and the rate of glucose oxidation . Thus, although there is substantial evidence that clenbuterol markedly alters mitochondrial content and .
Steviol glycosides (SGs) are recognized as a safe natural sweetener; however evidence from randomized controlled trials (RCTs) showed an inconclusive effect of SGs on glucose metabolism in adult participants. We aimed to conduct a systematic review and meta-analysis of RCTs to assess the effect of SGs on glu Food & Function Review Articles 2023
Glucose transport. Excessive proliferation is one of the main differences between cancer and normal cells. Therefore, a common characteristic of metabolic changes in tumor cells is increased glucose uptake [], which can also be observed when mitochondrial functions are complete [26,27,28]. To meet the large nutritional demands in the course of cell proliferation, tumor cells adopt a very .
WT mice that were fed a high fat diet (HFD) for at least 8 weeks were characterized in several metabolic tests, either in the absence or presence of co-injected clenbuterol. When obese HFD mice were subjected to a GTT, i. p. co-injection of glucose (1 g/kg) and clenbuterol had no clear effect on glucose tolerance (Figure 2 L, M).
Diabetic kidney disease (DKD) progresses differently in males compared with females. Clotet-Freixas et al. report increased altered glucose and glutamine metabolism in primary human kidney proximal tubular cells from males compared with females. In mice with different combinations of sex chromosomes, the authors showed that male gonadal sex underpinned sex differences in kidney metabolism.
Clenbuterol is a beta 2-adrenoceptor agonist marketed as an asthma reliever but is not approved for human use in most countries due to concerns of adverse cardiac effects. Given its demonstrated hypertrophic and lipolytic actions in rodents, clenbuterol is one of the most widely abused doping substances amongt athletes and recreational body-builders seeking leanness.