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Appetite hormones

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https://www.readbyqxmd.com/read/28071649/effect-of-shortened-sleep-on-energy-expenditure-core-body-temperature-and-appetite-a-human-randomised-crossover-trial
#1
Masanobu Hibi, Chie Kubota, Tomohito Mizuno, Sayaka Aritake, Yuki Mitsui, Mitsuhiro Katashima, Sunao Uchida
The effects of sleep restriction on energy metabolism and appetite remain controversial. We examined the effects of shortened sleep duration on energy metabolism, core body temperature (CBT), and appetite profiles. Nine healthy men were evaluated in a randomised crossover study under two conditions: a 3.5-h sleep duration and a 7-h sleep duration for three consecutive nights followed by one 7-h recovery sleep night. The subjects' energy expenditure (EE), substrate utilisation, and CBT were continually measured for 48 h using a whole-room calorimeter...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28061687/new-targets-for-drug-treatment-of-obesity
#2
Georgios Valsamakis, Panagiota Konstantakou, George Mastorakos
Antiobesity medical management has shown unsatisfactory results to date in terms of efficacy, safety, and long-term maintenance of weight loss. This poor performance could be attributed to the complexity of appetite regulation mechanisms; the serious drug side effects; and, crucially, the lack of profile-matching treatment strategies and individualized, multidisciplinary follow-up. Nevertheless, antiobesity pharmacotherapy remains a challenging, exciting field of intensive scientific interest. According to the latest studies, the future of bariatric medicine lies in developing drugs acting at multiple levels of the brain-gut axis...
January 6, 2017: Annual Review of Pharmacology and Toxicology
https://www.readbyqxmd.com/read/28056951/capromorelin-oral-solution-entyce%C3%A2-increases-food-consumption-and-body-weight-when-administered-for-4-consecutive-days-to-healthy-adult-beagle-dogs-in-a-randomized-masked-placebo-controlled-study
#3
Bill Zollers, Linda Rhodes, Ernst Heinen
BACKGROUND: Dogs can suffer from inappetence caused by a variety of medical conditions. This may present as anorexia (complete loss of appetite), hyporexia (decreased appetite) or dysrexia (change in food preferences). A drug with a new mechanism of action, capromorelin, has potential to stimulate appetite in dogs. Capromorelin is a ghrelin receptor agonist, which mimics the action of endogenous ghrelin. It is a member of the growth hormone secretagogue (GHS) class of drugs. Capromorelin oral solution (ENTYCE®) was tested in healthy adult male and female Beagle dogs (n = 6 males and 6 females per group) for its effect on food consumption and body weight...
January 5, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28047017/su-c-204-07-radiation-therapy-as-a-potential-treatment-for-obesity-initial-data-from-a-preclinical-investigation
#4
A Pasciak, Y Bradley, L Nodit, A Bourgeois, B Paxton, A Arepally
PURPOSE: To evaluate the feasibility of Yttrium-90 (90Y) radionuclide therapy as a potential treatment for obesity in a porcine model. As the only appetite-stimulating hormone, localized targeting of ghrelin-producing X/A cells in the fundus of the stomach using 90Y may reduce serum ghrelin levels and decrease hunger. METHODS: Under approval of the University of Tennessee IACUC, 8 young female pigs aged 12-13 weeks and weighing 21.8-28.1 Kg were included in this study...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28036041/effect-of-human-milk-appetite-hormones-macronutrients-and-infant-characteristics-on-gastric-emptying-and-breastfeeding-patterns-of-term-fully-breastfed-infants
#5
Zoya Gridneva, Sambavi Kugananthan, Anna R Hepworth, Wan J Tie, Ching T Lai, Leigh C Ward, Peter E Hartmann, Donna T Geddes
Human milk (HM) components influence infant feeding patterns and nutrient intake, yet it is unclear how they influence gastric emptying (GE), a key component of appetite regulation. This study analyzed GE of a single breastfeed, HM appetite hormones/macronutrients and demographics/anthropometrics/body composition of term fully breastfed infants (n = 41, 2 and/or 5 mo). Stomach volumes (SV) were calculated from pre-/post-feed ultrasound scans, then repeatedly until the next feed. Feed volume (FV) was measured by the test-weigh method...
December 28, 2016: Nutrients
https://www.readbyqxmd.com/read/28035969/the-neurobiological-impact-of-ghrelin-suppression-after-oesophagectomy
#6
REVIEW
Conor F Murphy, Carel W le Roux
Ghrelin, discovered in 1999, is a 28-amino-acid hormone, best recognized as a stimulator of growth hormone secretion, but with pleiotropic functions in the area of energy homeostasis, such as appetite stimulation and energy expenditure regulation. As the intrinsic ligand of the growth hormone secretagogue receptor (GHS-R), ghrelin appears to have a broad array of effects, but its primary role is still an area of debate. Produced mainly from oxyntic glands in the stomach, but with a multitude of extra-metabolic roles, ghrelin is implicated in complex neurobiological processes...
December 26, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28012610/secondary-to-excessive-melatonin-synthesis-the-consumption-of-tryptophan-from-outside-the-blood-brain-barrier-and-melatonin-over-signaling-in-the-pars-tuberalis-may-be-central-to-the-pathophysiology-of-winter-depression
#7
José Carlos Pereira, Márcia Pradella Hallinan, Rosana Cardoso Alves
Seasonal affective disorder is defined as recurrent episodes of major depression, mania, or hypomania with seasonal onset and remission. In this class of mood disturbances, a unipolar major depressive disorder known as winter depression is common in populations living in northern latitudes far from the equator. Winter depression repeatedly occurs in the autumn or winter and remits in the spring or summer, and its etiopathogenesis is currently unknown. However, one can surmise that excessive melatonin production during the reduced duration of daily sunlight in the autumn and winter plays a role in its pathophysiology...
January 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28011402/the-impact-of-the-appetite-regulating-orexigenic-peptide-ghrelin-on-alcohol-use-disorders-a-systematic-review-of-preclinical-and-clinical-data
#8
Anne Koopmann, Rilana Schuster, Falk Kiefer
Ghrelin, which is mainly released from the stomach, is the most important orexigenic regulator of food intake, inducing appetite, enhancing adiposity and releasing growth hormone. Besides the hypothalamus, ghrelin receptors (GHS-R1A) are also expressed in the mesolimbic dopaminergic system, which increases the possibility that ghrelin plays an important role in reward regulation for substance use disorders such as alcohol addiction, especially through activating the cholinergic-dopaminergic reward link. In this review we focus on the impact of ghrelin on the development and maintenance of alcohol addiction/dependence, alcohol consumption, alcohol craving and alcohol withdrawal, attempting to integrate preclinical and clinical studies concerning the intriguing relationship between appetite regulation, reward and alcohol addiction...
December 21, 2016: Biological Psychology
https://www.readbyqxmd.com/read/28010876/central-ghrelin-resistance-permits-the-overconsolidation-of-fear-memory
#9
Elia S Harmatz, Lauren Stone, Seh Hong Lim, Graham Lee, Anna McGrath, Barbara Gisabella, Xiaoyu Peng, Eliza Kosoy, Junmei Yao, Elizabeth Liu, Nuno J Machado, Veronica S Weiner, Warren Slocum, Rodrigo A Cunha, Ki A Goosens
BACKGROUND: There are many contradictory findings about the role of the hormone ghrelin in aversive processing, with studies suggesting that ghrelin signaling can both inhibit and enhance aversion. Here, we characterize and reconcile the paradoxical role of ghrelin in the acquisition of fearful memories. METHODS: We used enzyme-linked immunosorbent assay to measure endogenous acyl-ghrelin and corticosterone at time points surrounding auditory fear learning. We used pharmacological (systemic and intra-amygdala) manipulations of ghrelin signaling and examined several aversive and appetitive behaviors...
November 29, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/28007490/gut-brain-nutrient-sensing-in-food-reward
#10
Ari Shechter, Gary J Schwartz
For the past several decades, vagal and hormonal gut-brain negative feedback signaling mechanisms that promote satiety and subsequent suppression of food intake have been explored. In addition, a separate positive feedback process termed "appetition," involving postoral signaling from the gut to the brain, has been shown to promote food intake and produce flavor-nutrient preference conditioning. Afferent fibers emerging from the vagus nerve form the main pathway by which information is relayed from the abdominal viscera to the hindbrain and eventually other higher brain regions involved in food intake...
December 20, 2016: Appetite
https://www.readbyqxmd.com/read/28007055/physiological-and-pathophysiological-aspects-of-incretin-hormones-and-glucagon
#11
Jonatan Ising Bagger
Infusion of oxyntomodulin and the separate and combined infusion of GLP-1 and glucagon inhibited food intake similarly in healthy individuals, with no superior effect of combining GLP-1 and glucagon. We confirm the inhibitory effects of oxyntomodulin and GLP-1, respectively, on GE and appetite scores observed previously, but by adding glucagon to the infusion of GLP-1 we found no additive effects. Unexpectedly, glucagon alone had no effect on GE and appetite scores, but inhibited food intake to the same extent as oxyntomodulin, GLP-1 and GLP-1 + glucagon...
January 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28004236/ghrelin-is-independently-associated-with-anti-mullerian-hormone-levels-in-obese-but-not-non-obese-women-with-polycystic-ovary-syndrome
#12
Margaret C Garin, Samantha F Butts, David B Sarwer, Kelly C Allison, Suneeta Senapati, Anuja Dokras
Ghrelin is an endogenous appetite stimulant that may have a role in ovarian function. Women with polycystic ovary syndrome have anovulation and frequently weight management issues; however the associations between ghrelin and hormonal markers in polycystic ovary syndrome have not been well studied. In order to characterize the association between total ghrelin levels and ovarian function and the possible modification of this relationship by obesity, we examined total ghrelin levels and anti-mullerian hormone, total testosterone, and insulin in obese and non-obese women with and without polycystic ovary syndrome...
December 21, 2016: Endocrine
https://www.readbyqxmd.com/read/28004148/an-enzymatically-stable-gip-xenin-hybrid-peptide-restores-gip-sensitivity-enhances-beta-cell-function-and-improves-glucose-homeostasis-in-high-fat-fed-mice
#13
Annie Hasib, Ming T Ng, Victor A Gault, Dawood Khan, Vadivel Parthsarathy, Peter R Flatt, Nigel Irwin
AIMS/HYPOTHESIS: Glucose-dependent insulinotropic polypeptide (GIP) and xenin, regulatory gut hormones secreted from enteroendocrine K cells, exert important effects on metabolism. In addition, xenin potentiates the biological actions of GIP. The present study assessed the actions and therapeutic utility of a (DAla(2))GIP/xenin-8-Gln hybrid peptide, in comparison with the parent peptides (DAla(2))GIP and xenin-8-Gln. METHODS: Following confirmation of enzymatic stability, insulin secretory activity of (DAla(2))GIP/xenin-8-Gln was assessed in BRIN-BD11 beta cells...
December 21, 2016: Diabetologia
https://www.readbyqxmd.com/read/28003581/triterpenes-suppress-octanoylated-ghrelin-production-in-ghrelin-expressing-human-gastric-carcinoma-cells
#14
Kensuke Nakajima, Shigeru Oiso, Takuhiro Uto, Osamu Morinaga, Yukihiro Syoyama, Hiroko Kariyazono
Ghrelin is an appetite-stimulating peptide hormone with an octanoyl modification at serine 3 that is essential for its orexigenic effect. Ghrelin O-acyltransferase (GOAT) is the enzyme that catalyzes ghrelin acylation using fatty acyl-coenzyme A as a substrate. We previously developed an assay system based on the AGS-GHRL8 cell line that produces octanoylated ghrelin in the presence of octanoic acid, and demonstrated that some fatty acids suppressed octanoylated ghrelin production. Recent studies have reported that triterpenes have anti-obesity effect...
2016: Biomedical Research
https://www.readbyqxmd.com/read/28003008/glucagon-like-peptide-1-glp-1-receptor-agonists-in-the-treatment-of-obese-women-with-polycystic-ovary-syndrome
#15
Themistoklis Tzotzas, Spyridon N Karras, Niki Katsiki
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in females and is often associated with a number of cardiometabolic disorders such as central obesity, dyslipidaemia, hypertension, insulin resistance, hyperinsulinaemia, glucose intolerance and type 2 diabetes mellitus (T2DM). Glucagon-like peptide-1 (GLP-1), a gut hormone secreted after a meal, enhances glucose-stimulated insulin secretion and additionally suppresses appetite and gastric motility. Most studies found impaired GLP-1 kinetics in obese individuals, whereas small studies in PCOS reported reduced, normal or even elevated GLP-1 levels...
December 21, 2016: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28000544/the-complex-inter-relationship-between-diabetes-and-schizophrenia
#16
Jeffery Rado
Schizophrenia is a chronic and debilitating brain disorder. It is associated with increased mortality, primarily due to elevated cardio-metabolic risk. Affected patients have higher rates of obesity, metabolic syndrome and diabetes [1]. Intrinsic factors contributing to this increased risk include a shared underlying pathophysiology between schizophrenia and diabetes mellitus involving stress, inflammation and genetics. Extrinsic contributing factors include diet, lifestyle, health care access, low socioeconomic status and overburden of traditional diabetes risk factors...
December 20, 2016: Current Diabetes Reviews
https://www.readbyqxmd.com/read/27994947/recent-advances-in-the-understanding-of-how-neuropeptide-y-and-%C3%AE-melanocyte-stimulating-hormone-function-in-adipose-physiology
#17
REVIEW
Steven L Shipp, Mark A Cline, Elizabeth R Gilbert
Communication between the brain and the adipose tissue has been the focus of many studies in recent years, with the "brain-fat axis" identified as a system that orchestrates the assimilation and usage of energy to maintain body mass and adequate fat stores. It is now well-known that appetite-regulating peptides that were studied as neurotransmitters in the central nervous system can act both on the hypothalamus to regulate feeding behavior and also on the adipose tissue to modulate the storage of energy. Energy balance is thus partly controlled by factors that can alter both energy intake and storage/expenditure...
October 2016: Adipocyte
https://www.readbyqxmd.com/read/27981540/sleeve-gastrectomy-have-we-finally-found-the-holy-grail-of-bariatric-surgery-a-review-of-the-literature
#18
I Kehagias, A Zygomalas, D Karavias, S Karamanakos
OBJECTIVE: Laparoscopic sleeve gastrectomy has become one of the most commonly performed bariatric operations. It is essentially a restrictive bariatric operation; however, a series of hormonal changes occurring postoperatively contribute to decreased appetite and reduced food intake. PATIENTS AND METHODS: This is a literature review of recent articles published on Pubmed, Medline and Google Scholar databases in English. RESULTS: Although, laparoscopic sleeve gastrectomy is commonly performed worldwide, there is still a lack of standardization regarding the surgical technique...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27966574/acute-increases-in-serum-colonic-short-chain-fatty-acids-elicited-by-inulin-do-not-increase-glp-1-or-pyy-responses-but-may-reduce-ghrelin-in-lean-and-overweight-humans
#19
S Rahat-Rozenbloom, J Fernandes, J Cheng, T M S Wolever
BACKGROUND: Colonic fermentation of dietary fibre to short-chain fatty acids (SCFA) influences appetite hormone secretion in animals, but SCFA production is excessive in obese animals. This suggests there may be resistance to the effect of SCFA on appetite hormones in obesity. OBJECTIVES: To determine the effects of inulin (IN) and resistant starch (RS) on postprandial SCFA, and gut hormone (glucagon-like peptide (GLP-1), peptide-tyrosine-tyrosine (PYY) and ghrelin) responses in healthy overweight/obese (OWO) vs lean (LN) humans...
December 14, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27966210/ghrelin-immunoreactive-cells-in-the-gastrointestinal-tract-of-hypertensive-rats
#20
Izabela Janiuk, Jerzy Kaleczyc, Irena Kasacka
INTRODUCTION: Ghrelin, an appetite-stimulating hormone secreted by the endocrine cells of the gastrointestinal (GI) tract, has recently been shown to affect the function of the cardiovascular system. This study aimed to assess the number and morphology of ghrelin-immunopositive (GhrIP) cells in the gastrointestinal tract of rats at different developmental phases of experimentally evoked renovascular hypertension. MATERIAL AND METHODS: The study involved 40 rats divided into two groups: control (C; n = 20) and rats with experimentally induced hypertension (EH; n = 20)...
December 14, 2016: Folia Histochemica et Cytobiologica
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