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Showing 1 to 20 of 69 for “"Ghrelin"”.
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Enzymology and inhibition of ghrelin acylation by ghrelin O-acyltransferase
<p>Ghrelin is a circulating peptide hormone that plays a regulatory role in many physiological processes related to energy balance and metabolism. To be recognized by its receptor, growth hormone secretagogue receptor 1a (GHSR1a), the serine 3 residue of ghrelin must be octanoylated. This unique …
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Structural and Functional Insights into Ghrelin Acylation by Ghrelin O-Acyltransferase
<p>Ghrelin is a peptide hormone primarily secreted by the stomach that acts as the endogenous ligand for the GHSR1a G-protein-coupled receptor. This 28 amino acid peptide stimulates appetite and has been associated with the cardiovascular, gastrointestinal, neuroendocrine, and immune systems. …
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Essential Function of Ghrelin in Chronic Starvation
Ghrelin, an octanoylated peptide hormone secreted from the stomach, stimulates the release of growth hormone (GH) from the pituitary. Ghrelin O-acyltransferase (GOAT) is the enzyme required for the attachment of octanoate to serine-3 of ghrelin, a step essential for making active ghrelin. In this …
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Investigating the Enteroendocrine - Brain Axis: Ghrelin Cell and ECL Cell Physiology and Ghrelin Action on Mood and Complex Eating
… through which the orexigenic peptide hormone ghrelin act to regulate homeostatic feeding is fairly well documented. However, less understood are the mechanisms and brain regions that mediate ghrelin's effects on mood and complex eating behaviors. At the cellular level, little is known about …
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Ghrelin: The Hunger Hormone that Isn't
Ghrelin is a 28-amino acid acylated peptide hormone secreted by endocrine cells in the stomach. It was first identified in 1999 and shortly thereafter shown to stimulate appetite when injected into rodents and humans. While ghrelin knockout mice have failed to show a decrease in appetite or …
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Identification and Biochemical Characterization of Ghrelin O-Acyltransferase (GOAT)
Ghrelin is a 28-amino acid, appetite-stimulating hormone secreted by the food-deprived stomach. Ser-3 of ghrelin is acylated with an eight-carbon fatty acid, octanoate, which is critically required for its endocrine actions. However, the octanoylating enzyme had remained elusive for nearly a …
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An Investigation into the pharmacology of the ghrelin receptor
The ghrelin receptor (GRLN-R) was cloned in 1996 after the discovery that a series of synthetic growth hormone-releasing compounds (the growth hormone secretagogues) acted through a receptor distinct from the growth hormone-releasing hormone receptor. In 1999 the endogenous ligand of the receptor, …
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The structure and function of the human ghrelin receptor
The peptide hormone, ghrelin, exerts its physiological effects through a G-protein-coupled receptor called the ghrelin-R. The ghrelin-R displays a high degree of constitutive activity, signalling through the inositol phosphate pathway in the absence of bound agonist. TMs III and VI have been …
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Significance of leptin and ghrelin in systemic lupus erythematosus in Koreans
… There have been evidence that leptin and ghrelin play an important role in metabolism, inflammation and autoimmunity. Elevated serum leptin levels have been described in patients with systemic lupus erythematosus (SLE), however there were no information about serum leptin and ghrelin …
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The ghrelin system links dietary lipids with the endocrine control of energy homeostasis
Ghrelin is a unique hunger-inducing stomach-borne hormone. It activates orexigenic circuits in the central nervous system (CNS) when acylated with a fatty acid residue by the Ghrelin O-acyltransferase (GOAT). Soon after the discovery of ghrelin a theoretical model emerged which suggests that the …
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Quality of life, Biomarkers, and Involvement of Ghrelin in Women with Breast Cancer
… treatment for the cancer and the role of ghrelin hormone in BC and depression at a tissue level and at serum level. In order to examine QOL with its all dimensions among women with BC, an epidemiological case-control study was conducted recruiting a sample of 300 women, 155 women with BC …
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A Survey of Stapling Methods to Increase the Affinity, Activity and Stability of Ghrelin Analogues
… and pathophysiological processes in the body. Ghrelin is the primary high affinity endogenous ligand for GHSR and has limited secondary structure in solution, which makes it proteolytically unstable. This inherent instability in ghrelin can be overcome by incorporating helix-inducing staples …
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Ghrelin Processing and Maturation: Developing a Molecular-Level Framework for Hormone Activation and Biological Function
<p>Ghrelin is a 28 amino acid hormone involved in appetite stimulation, maintenance of energy balance, and a range of other neuroendocrine functions. Over the course of its expression and maturation, proghrelin (the prohormone of ghrelin) undergoes a unique posttranslational modification whereby a …
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Neurobiologically-motivated treatments for post-traumatic stress disorder in an animal model
… fear learning and increases plasma acylated ghrelin. This effect is independent of the hypothalamus-pituitary-adrenal (HPA) axis since it was unaffected by prior bilateral adrenalectomy. Chronic exposure to a ghrelin receptor agonist, without stress, enhanced associational fear learning …
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Mechanisms of pathological adipogenesis
… some forms of osteoporosis. Ion channels and ghrelin signalling have been shown to be involved in regulating many cell processes such as proliferation, differentiation and apoptosis, particularly in bone. This thesis investigated the roles of ghrelin and ion channels in the adipogenic …
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Ghrelin, Cannabinoids, and Motivation: Increased Food Motivation on Progressive Ratio Paradigm Through MAGL/FAAH Inhibition in a Rat Model
Both ghrelin and endogenous cannabinoids act in the ventral tegmental area (VTA) to increase feeding behaviours, through their interaction is not understood. It is hypothesized that ghrelin influences this system by stimulating the release of endocannabinoids from dopamine cells through its …
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Genomic and Physiological Differences for Ghrelin and Leptin Receptor in Lines of Chickens Selected for High and Low Body Weight
… system activity. Leptin, leptin receptor, and ghrelin genes influence the ANS regulation of body weight and food intake. The aim of this study was to investigate whether there are differences in leptin, the leptin receptor, or ghrelin regulation between lines of chickens selected for high (HWS) …
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Effects of palatable diets on appetite regulation, appetite peptides and neurogenesis.
… consumption of diets rich in fat and/or sugar. Ghrelin and leptin are hormones, originating from the periphery, involved in the regulation of food intake and of maintaining energy homeostasis. Circulating ghrelin levels increase in times of energy deficiency, such as fasting, signalling hunger …
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Hormone Responses to Two Different Energy Restriction Programs
… and leptin) and an increase in hunger hormones (ghrelin) with weight loss, however results are conflicting. Currently, no studies have examined hormone levels comparing different approaches in calorie reductions for weight loss. PURPOSE: The primary purpose was to compare plasma levels of …
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Changes in Dietary Intake, Macronutrients, Diet Quality, and Hunger Hormones after a 24-Week Diabetes Education Program Featuring Intermittent Energy Restriction or Time-Restricted Eating
… on diet intake, quality, and hunger hormones (ghrelin, leptin) have not been compared in a parallel trial. This study examined how ghrelin and leptin relate to diet quality and how IER and TRE+ER affect diet in those with overweight/obesity and type 2 diabetes mellitus (T2DM). Methods: This RCT …
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