Reduced activity without hyperphagia contributes to obesity in Tubby mutant mice
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چکیده
منابع مشابه
Obesity, hyperphagia and increased metabolic efficiency in Pc1 mutant mice.
Prohormone convertase 1 (PC1) mutations lead to obesity in humans. However, Pc1 knockout mice do not become obese; in fact, they are runted due to a defect in growth-hormone releasing hormone processing, leading to the speculation that PC1 subserves different functions between mouse and human. Here, we report a novel allele of mouse Pc1 (N222D) that leads to obesity, abnormal proinsulin process...
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Among polygenic mouse models of obesity, the New Zealand obese (NZO) mouse exhibits the most severe phenotype, with fat depots exceeding 40% of total body weight at the age of 6 mo. Here we dissected the components of energy balance including feeding behavior, locomotor activity, energy expenditure, and thermogenesis compared with the related lean New Zealand black (NZB) and obese B6.V-Lep(ob)/...
متن کاملRFamide peptide QRFP43 causes obesity with hyperphagia and reduced thermogenesis in mice.
QRFP, an RFamide peptide, was recently identified as an endogenous ligand of an orphan G protein-coupled receptor, GPR103. Recent investigation revealed that acute intracerebroventricular (ICV) administration of QRFP26/P518/26RFa, a constitutive part of QRFP43 (43-amino acid-residue form of QRFP), increases appetite in mice, but its role in long-term energy homeostasis remains unknown. In the p...
متن کاملHypermetabolism, Hyperphagia, and Reduced Adiposity in Tankyrase-Deficient Mice
OBJECTIVE Tankyrase (TNKS) is a Golgi-associated poly-ADP-ribose polymerase that is implicated in the regulation of GLUT4 trafficking in 3T3-L1 adipocytes. Its chromosomal locus 8p23.1 is linked to monogenic forms of diabetes in certain kindred. We hypothesize that TNKS is involved in energy homeostasis in mammals. RESEARCH DESIGN AND METHODS Gene-trap techniques were used to ablate TNKS expr...
متن کاملEnhanced hypothalamic AMP-activated protein kinase activity contributes to hyperphagia in diabetic rats.
AMP-activated protein kinase (AMPK) acts as a cellular energy sensor, being activated during states of low energy charge. Hypothalamic AMPK activity is altered by hormonal and metabolic signals and mediates the feeding response. To determine the effect of diabetes on hypothalamic AMPK activity, we assayed this activity in streptozotocin (STZ)-induced diabetic rats. Compared with control rats, S...
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ژورنال
عنوان ژورنال: Physiology & Behavior
سال: 2008
ISSN: 0031-9384
DOI: 10.1016/j.physbeh.2008.05.014