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Página 1 a partir de 29 resultados
Polyamines in pancreatic islets of obese-hyperglycemic (ob/ob) mice of different ages.
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To further evaluate the role of polyamines in insulin production and cell replication in diabetic pancreatic islets, we have studied hyperplastic islets of obese-hyperglycemic mice of different ages and normal islets of the same strain. The aims of the study were to investigate the impact of the
Effect of GnRH administration on blood polyamines and LH levels in normal and obese children.
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Blood polyamines (spermidine and spermine) and LH levels have been studied after acute GnRH injection both in obese and normal weight children. In both groups LH values significantly increased after stimulation but reached higher peaks in normal children than in obese ones (P less than 0.05). On the
Polyamine-regulated translation of spermidine/spermine-N1-acetyltransferase.
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Rapid synthesis of the polyamine catabolic enzyme spermidine/spermine-N(1)-acetyltransferase (SSAT) in response to increased polyamines is an important polyamine homeostatic mechanism. Indirect evidence has suggested that there is an important control mechanism involving the release of a
A spermine-coupled cholesterol metabolite from the shark with potent appetite suppressant and antidiabetic properties.
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OBJECTIVE
We describe the pharmacological properties of a novel spermine-cholesterol adduct, MSI 1436 (3beta-N-1(spermine)-7alpha, 24R-dihydroxy-5alpha-cholestane 24-sulfate), which causes reversible suppression of food and fluid intake in mammals resulting in profound weight loss, not associated
Spermidine/spermine N1-acetyltransferase-mediated polyamine catabolism regulates beige adipocyte biogenesis.
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OBJECTIVE
Cold and β3-adrenergic receptor (AR) agonists activate beige adipocyte biogenesis in white adipose tissue (WAT). The two stimuli also induce expression of inflammatory cytokines in WAT. The low-grade inflammation may further promote WAT browning. However, the mechanisms to reconcile these
Lower polyamine levels in breast milk of obese mothers compared to mothers with normal body weight.
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BACKGROUND
Obesity is associated with risks for mother and infant, and the mothers' dietary habits influence breast milk composition. Polyamines are secreted in breast milk and are essential for the regulation of intestinal and immune function in newborns and infants. The present study aimed to
Uremic toxins: some thoughts on acrolein and spermine.
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Chronic kidney disease (CKD) is characterized by the progressive reduction of glomerular filtration rate and subsequent retention of organic waste compounds called uremic toxins. While patients with CKD are at a higher risk of premature death due to cardiovascular complications, this increased risk
Change in serum polyamine metabolome pattern after bariatric surgery in obese patients with metabolic syndrome.
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Polyamines are increased in obese children and are related to markers of oxidative/nitrosative stress and angiogenesis.
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BACKGROUND
Polyamines (putrescine, spermidine, and spermine) are polycationic amines derived from arginine, which is the precursor of nitric oxide (NO). Due to the close relationship between the metabolism of polyamines and NO metabolism, the alteration in polyamine homeostasis can affect the NO
Relationship between adipose polyamine concentrations and triacylglycerol synthetic enzymes in lean and obese Zucker rats.
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Previous studies from our laboratory demonstrate that polyamines, namely spermine and spermidine, stimulate adipose triacylglycerol formation from the sn-glycerol-3-phosphate pathway by activation of several enzymes from this pathway, including sn-glycerol-3-phosphate acyltransferase,
Exogenous administration of spermine improves glucose utilization and decreases bodyweight in mice.
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Polyamines are highly charged low molecular weight aliphatic polycations and are ubiquitously present in all living cells. In addition to their previously reported role in cell proliferation and cancer, recent studies support their role in energy homeostasis and glucose metabolism. In the present
Dietary and Gut Microbiota Polyamines in Obesity- and Age-Related Diseases.
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The polyamines putrescine, spermidine, and spermine are widely distributed polycationic compounds essential for cellular functions. Intracellular polyamine pools are tightly regulated by a complex regulatory mechanism involving de novo biosynthesis, catabolism, and transport across the plasma
Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity.
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In obesity and type 2 diabetes, Glut4 glucose transporter expression is decreased selectively in adipocytes. Adipose-specific knockout or overexpression of Glut4 alters systemic insulin sensitivity. Here we show, using DNA array analyses, that nicotinamide N-methyltransferase (Nnmt) is the most
Preadipocyte proliferation is elevated by calcium sensing receptor activation.
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Obesity is a major worldwide problem, despite considerable efforts against it. While excess body fat defines obesity, adipose tissue quality and functionality are key to whether cardiovascular and metabolic comorbidities develop. Adipose tissue cellular composition can vary considerably, and excess
The activation of hepatic and muscle polyamine catabolism improves glucose homeostasis.
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The mitochondrial biogenesis and energy expenditure regulator, PGC-1α, has been previously reported to be induced in the white adipose tissue (WAT) and liver of mice overexpressing spermidine/spermine N (1)-acetyltransferase (SSAT). The activation of PGC-1α in these mouse lines leads to increased
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