epinephrine/obesity

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Epinephrine induces PDK4 mRNA expression in adipose tissue from obese, insulin resistant rats.

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Thiazolidinediones (TZDs) are a commonly prescribed class of insulin sensitizing drugs that increase fatty acid re-esterification, in part through the induction of pyruvate dehydrogenase kinase 4 (PDK4). Owing to the deleterious side effects of TZDs the identification of alternative approaches with

Altered metabolic and hormonal responses to epinephrine and beta-endorphin in human obesity.

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Catecholamines and endogenous opioid peptides are released in response to stress. Exogenous infusions of epinephrine and beta-endorphin (both in doses of 15, 50, and 80 ng/kg.min sequentially, each dose lasting 30 min) were used to mimic short term stress in both normal weight (body mass index, less

An impaired response of adenylate cyclase to stimulation by epinephrine in adipocyte plasma membranes from genetically obese mice (ob/ob).

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The present studies have established that there is an impaired response to epinephrine of the adenylate system in adipocyte preparations from obese hyperglycemic mice as compared to their thin littermates. In contrast, membrane preparations from both groups of animals were found to exhibit a similar

Plasma epinephrine predicts fasting glucose in centrally obese African-American women.

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The high prevalence of diabetes in African-American (AA) women has been widely assumed to be related to the greater prevalence of obesity in this group. Catecholamine release acting on central adipose tissue has been proposed to be a contributing factor. The aim of this article was to examine the

Effects of epinephrine on thermoregulatory behavior in lean and obese Zucker rats in the cold.

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This series of experiments examined whether epinephrine (EPI) produces the same thermoregulatory effects in the cold that have been reported for norepinephrine and isoproterenol. Lean and obese Zucker rats were trained to press a lever to activate infrared heat lamps in a cold (-8 degrees C)

Association of serum angiopoietin-like protein 2 and epinephrine levels in metabolically healthy but obese individuals: In vitro and in vivo evidence.

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In the present study, we explored the association of serum angiopoietin-like protein 2 (ANGPTL2) levels with insulin sensitivity and serum epinephrine levels in metabolically healthy but obese (MHO) subjects. We also investigated the effects of epinephrine on ANGPTL2 expression in adipocytes in

Activation of lipolysis by epinephrine and electrical stimulation in the perfused hindquarters of lean and obese-diabetic (db/db) mice.

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The effects of epinephrine and electrical stimulation on lipolysis in the skeletal muscles of lean, and obese-diabetic (db/db) mice were studied using the perfused mouse hindquarter preparation. The rate of glycerol release from the obese mouse preparation was two times that of their lean

Effect of epinephrine and insulin resistance on human monocytes obtained from lean and obese healthy participants: a pilot study.

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We assessed the effect of epinephrine on human monocytes. Monocytes were isolated from 16 healthy obese and 10 lean healthy subjects. Insulin sensitivity was assessed by euglycemic hyperinsulinemic clamp. Obese subjects were subdivided into 2 sub-groups, insulin sensitive (IS) and insulin resistant

Naltrexone potentiates glycemic responses during stress and epinephrine challenge in genetically obese mice.

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The genetically obese mouse (C57BL/6J ob/ob) is a commonly used animal model of non-insulin-dependent diabetes mellitus. These mice show exaggerated glycemic responses during behavioral stress and adrenergic stimulation, but the precise glucoregulatory mechanisms are not well characterized. The

Regulation of ob gene expression: evidence for epinephrine-induced suppression in human obesity.

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Leptin acts as satiety factor and increases energy expenditure. Studies conducted on animals and in vitro on adipocytes culture have shown that infusion of catecholamines leads to a significant reduction of ob gene expression; it appears of interest to evaluate the in vivo effects of adrenergic

Diminished epinephrine excretion in genetically obese (ob/ob) mice and monosodium glutamate-treated rats.

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While numerous studies have examined sympathetic nervous system activity in experimental obesity, adrenal medullary function in this condition has received less attention. The experiments described herein evaluated adrenal medullary secretion by measurement of urinary epinephrine (Epi) excretion in

Effect of protein-supplemented fasting on metabolic and hormonal responses to epinephrine infusion in obese subjects.

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The present study aimed at investigating the effects of an epinephrine (EPI) intravenous infusion (10 micrograms/min for 30 min) in normal subjects and in obese patients before and after 13 days of protein-supplemented fasting (PSF, 70 g protein/day). Blood glucose, plasma free fatty acids (FFA),

Plasma leptin response to an epinephrine infusion in lean and obese women.

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OBJECTIVE Because leptin production by adipose tissue is under hormonal control, we examined the impact of epinephrine administration on plasma leptin concentrations. METHODS We measured plasma leptin, insulin, and free fatty acid (FFA) responses after a 60-minute epinephrine infusion (0.010

Modulation of epinephrine-stimulated gluconeogenesis by insulin in hepatocytes isolated from genetically obese (fa/fa) Zucker rats.

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Genetically obese (fa/fa) Zucker rats present an impaired response of hepatic glucose production to the inhibition by insulin. In this work, we have investigated the modulation by this hormone of epinephrine-stimulated gluconeogenesis, in hepatocytes isolated from obese (fa/fa) rats and their lean

Modulation of gluconeogenesis by epinephrine in hepatocytes isolated from genetically obese (fa/fa) Zucker rats.

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The obese (fa/fa) Zucker rat shows an impaired sympathetic tone which is accompanied by an altered thermogenesis and changes in both lipid and carbohydrate metabolism. In this work, we have investigated the regulatory effects of epinephrine on the rate of gluconeogenesis from a mixture of

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