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Ghrelin

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https://www.readbyqxmd.com/read/28213614/reproductive-dysfunction-and-associated-pathology-in-women-undergoing-military-training
#1
REVIEW
Robert M Gifford, R M Reynolds, J Greeves, R A Anderson, D R Woods
INTRODUCTION: Evidence from civilian athletes raises the question of whether reproductive dysfunction may be seen in female soldiers as a result of military training. Such reproductive dysfunction consists of impaired ovulation with or without long-term subfertility. METHODS: A critical review of pertinent evidence following an extensive literature search. RESULTS: The evidence points towards reduced energy availability as the most likely explanation for exercise-induced reproductive dysfunction...
February 17, 2017: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/28213203/ghrelin-s-control-of-food-reward-and-body-weight-in-the-lateral-hypothalamic-area-is-sexually-dimorphic
#2
Lorena López-Ferreras, Jennifer E Richard, Rozita H Anderberg, Fredrik H Nilsson, Kajsa Olandersson, Scott E Kanoski, Karolina P Skibicka
Ghrelin is a stomach-produced hormone that stimulates ingestive behavior and increases motivated behavior to obtain palatable foods. Ghrelin receptors (growth hormone secretagogue receptors; Ghsr) are expressed in the lateral hypothalamic area (LHA), and LHA-targeted ghrelin application increases ingestive behavior in male rodents. However, the effects of LHA ghrelin signaling in females are unexplored. Here we investigated whether LHA ghrelin signaling is necessary and sufficient for control of ingestive and motivated behavior for food in male and female rats...
February 14, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28205670/leptin-and-ghrelin-concentration-in-hyperthyroid-cats-before-and-after-radioactive-iodine-therapy-compared-to-euthyroid-control-cats
#3
Sina Marsilio, Barbara Glanemann, Lucile Martin, Balazs Szladovits, Reto Neiger
OBJECTIVE: Leptin and ghrelin, two peptide hormones with antagonistic effects on satiety and energy balance, could be involved in the pathogenesis of weight loss and polyphagia in cats with hyperthyroidism. Leptin generally decreases appetite and increases energy expenditure, while ghrelin exerts the opposite effects. MATERIALS AND METHODS: Leptin and ghrelin were measured in 42 client owned hyperthyroid cats with a body condition score (BCS) ≤ 5/9 before (T0) and 4 weeks after radioactive iodine treatment (RAIT) (T1)...
February 16, 2017: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/28204197/circulating-ghrelin-acts-on-gaba-neurons-of-the-area-postrema-and-mediates-gastric-emptying-in-male-mice
#4
Agustina Cabral, María P Cornejo, Gimena Fernandez, Pablo N De Francesco, Guadalupe Garcia-Romero, Maia Uriarte, Jeffrey M Zigman, Enrique Portiansky, Mirta Reynaldo, Mario Perello
No abstract text is available yet for this article.
February 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28198428/acyl-ghrelin-induces-insulin-resistance-independently-of-gh-cortisol-and-free-fatty-acids
#5
Esben T Vestergaard, Niels Jessen, Niels Møller, Jens Otto Lunde Jørgensen
Ghrelin produced in the gut stimulates GH and ACTH secretion from the pituitary and also stimulates appetite and gastric emptying. We have shown that ghrelin also induces insulin resistance via GH-independent mechanisms, but it is unknown if this effect depends on ambient fatty acid (FFA) levels. We investigated the impact of ghrelin and pharmacological antilipolysis (acipimox) on insulin sensitivity and substrate metabolism in 8 adult hypopituitary patients on stable replacement with GH and hydrocortisone using a 2 × 2 factorial design: Ghrelin infusion, saline infusion, ghrelin plus short-term acipimox, and acipimox alone...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28195823/clinical-safety-of-bariatric-arterial-embolization-preliminary-results-of-the-beat-obesity-trial
#6
Clifford R Weiss, Olaguoke Akinwande, Kaylan Paudel, Lawrence J Cheskin, Brian Holly, Kelvin Hong, Aaron M Fischman, Rahul S Patel, Eun J Shin, Kimberley E Steele, Timothy H Moran, Kristen Kaiser, Amie Park, David M Shade, Dara L Kraitchman, Aravind Arepally
Purpose To conduct a pilot prospective clinical trial to evaluate the feasibility, safety, and short-term efficacy of bariatric embolization, a recently developed endovascular procedure for the treatment of obesity, in patients with severe obesity. Materials and Methods This is an institutional review board- and U.S. Food and Drug Administration-approved prospective physician-initiated investigational device exemption study. This phase of the study ran from June 2, 2014, to August 4, 2015. Five severely obese patients (four women, one man) who were 31-49 years of age and who had a mean body mass index of 43...
January 17, 2017: Radiology
https://www.readbyqxmd.com/read/28194094/food-seeking-in-a-risky-environment-a-method-for-evaluating-risk-and-reward-value-in-food-seeking-and-consumption-in-mice
#7
Sarah H Lockie, Clare V McAuley, Sasha Rawlinson, Natalie Guiney, Zane B Andrews
Most studies that measure food intake in mice do so in the home cage environment. This necessarily means that mice do not engage in food seeking before consumption, a behavior that is ubiquitous in free-living animals. We modified and validated several commonly used anxiety tests to include a palatable food reward within the anxiogenic zone. This allowed us to assess risk-taking behavior in food seeking in mice in response to different metabolic stimuli. We modified the open field test and the light/dark box by placing palatable peanut butter chips within a designated food zone inside the anxiogenic zone of each apparatus...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28194012/a-dna-methylation-site-within-the-klf13-gene-is-associated-with-orexigenic-processes-based-on-neural-responses-and-ghrelin-levels
#8
L Wiemerslage, R Islam, C van der Kamp, H Cao, G Olivo, F Ence-Eriksson, S Castillo, A L Larsen, M Bandstein, L S Dahlberg, E Perland, V Gustavsson, J Nilsson, H Vogel, A Schürmann, E-M Larsson, M Rask-Andersen, C Benedict, H B Schiöth
We investigated five methylation markers recently linked to body-mass index, for their role in the neuropathology of obesity. In neuroimaging experiments, our analysis involving 23 participants showed that methylation levels for the cg07814318 site, which lies within the KLF13 gene, correlated with brain activity in the claustrum, putamen, cingulate gyrus, and frontal gyri, some of which have been previously associated to food signaling, obesity, or reward. Methylation levels at cg07814318 also positively correlated with ghrelin levels...
February 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28191004/ghrelin-reactive-immunoglobulins-in-conditions-of-altered-appetite-and-energy-balance
#9
REVIEW
Sergueï O Fetissov, Nicolas Lucas, Romain Legrand
Part of circulating ghrelin is bound to immunoglobulins (Ig) protecting it from degradation and preserving its functional activity. This review summarizes the data on ghrelin- and desacyl-ghrelin-reactive IgG in conditions of altered appetite and energy balance. Plasma levels and affinity kinetics of such IgG were compared in patients with obesity and anorexia nervosa (AN) and in animal models of obesity including ob/ob mice, high-fat diet-induced obese mice, and obese Zucker rats as well as in mice after chronic food restriction and activity-based anorexia and in rats with methotrexate-induced anorexia...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28184958/bariatric-arterial-embolization-with-non-spherical-polyvinyl-alcohol-particles-for-ghrelin-suppression-in-a-swine-model
#10
Jae Min Kim, Man-Deuk Kim, Kichang Han, Lailatul Muqmiroh, Seung Up Kim, Gyoung Min Kim, Joonho Kwon, Sung Il Park, Jong Yun Won, Do Yun Lee
PURPOSE: To evaluate the effect of bariatric arterial embolization (BAE) with non-spherical polyvinyl alcohol (PVA) particles on systemic ghrelin levels, weight change, and gastric ulceration risk in a swine model. MATERIALS AND METHODS: From March 2014 to February 2015, ten healthy swine were used in the study (mean weight 31.5 kg; range 24.0-41.5 kg). The animals were randomly assigned to two groups: the embolized group (n = 5) in which BAE was performed and the control group (n = 5)...
February 9, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28182729/rikkunshito-prevents-paclitaxel-induced-peripheral-neuropathy-through-the-suppression-of-the-nuclear-factor-kappa-b-nf%C3%AE%C2%BAb-phosphorylation-in-spinal-cord-of-mice
#11
Junzo Kamei, Shunsuke Hayashi, Akane Sakai, Yuki Nakanishi, Misa Kai, Megumi Ikegami, Hiroko Ikeda
Peripheral neuropathy is the major side effect caused by paclitaxel, a microtubule-binding antineoplastic drug. Paclitaxel-induced peripheral neuropathy causes a long-term negative impact on the patient's quality of life. However, the mechanism underlying paclitaxel-induced peripheral neuropathy is still unknown, and there is no established treatment. Ghrelin is known to attenuate thermal hyperalgesia and mechanical allodynia in chronic constriction injury of the sciatic nerve, and inhibit the activation of nuclear factor kappa B (NFκB) in the spinal dorsal horn...
2017: PloS One
https://www.readbyqxmd.com/read/28178327/characterization-of-ghrelin-o-acyltransferase-goat-in-goldfish-carassius-auratus
#12
Ayelén Melisa Blanco, Miguel Gómez-Boronat, Ángel Luis Alonso-Gómez, Roman Yufa, Suraj Unniappan, María Jesús Delgado, Ana Isabel Valenciano
Ghrelin is the only known hormone posttranslationally modified with an acylation. This modification is crucial for most of ghrelin's physiological effects and is catalyzed by the polytopic enzyme ghrelin O-acyltransferase (GOAT). The aim of this study was to characterize GOAT in a teleost model, goldfish (Carassius auratus). First, the full-length cDNA sequence was obtained by RT-PCR and rapid amplification of cDNA ends methods. Two highly homologous cDNAs of 1491 and 1413 bp, respectively, named goat-V1 and goat-V2 were identified...
2017: PloS One
https://www.readbyqxmd.com/read/28174289/vascular-effects-of-obestatin-in-lean-and-obese-subjects
#13
Francesca Schinzari, Augusto Veneziani, Nadia Mores, Angela Barini, Nicola Di Daniele, Carmine Cardillo, Manfredi Tesauro
Obese patients have impaired vasodilator reactivity and increased endothelin (ET)-1-mediated vasoconstriction, two abnormalities contributing to vascular dysfunction. Obestatin, a product of the ghrelin gene, in addition to favorable effects on glucose and lipid metabolism, has shown nitric oxide (NO)-dependent vasodilator properties in experimental models. Given these premises, we compared the effects of exogenous obestatin on forearm flow in lean and obese subjects and assessed its influence on ET-1-dependent vasoconstrictor tone in obesity...
February 7, 2017: Diabetes
https://www.readbyqxmd.com/read/28170279/regulation-of-gip-and-ghrelin-in-healthy-subjects-fed-on-sun-dried-raisins-a-pilot-study-with-a-crossover-trial-design
#14
Andriana C Kaliora, Panagiotis T Kanellos, Aristea Gioxari, Vaios T Karathanos
The comparative effects of glucose and fructose on appetite and specifically on hormones regulating appetite remain controversial, and the role of different types of sugars has not been investigated broadly. To estimate the effect of raisins, a dried fruit rich in fructose, fibers, and phenolics, on hormones involved in the postprandial response. Ten healthy normal-weight subjects received in a crossover design 74 g raisins or 50 g glucose as reference food. Glucose, insulin, and appetite hormones were measured at time 0 and 60, 120, and 180 min after consumption...
February 7, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28167792/ghrelin-affects-stopover-decisions-and-food-intake-in-a-long-distance-migrant
#15
Wolfgang Goymann, Sara Lupi, Hiroyuki Kaiya, Massimiliano Cardinale, Leonida Fusani
Billions of birds migrate long distances to either reach breeding areas or to spend the winter at more benign places. On migration, most passerines frequently stop over to rest and replenish their fuel reserves. To date, we know little regarding how they decide that they are ready to continue their journey. What physiological signals tell a bird's brain that its fuel reserves are sufficient to resume migration? A network of hormones regulates food intake and body mass in vertebrates, including the recently discovered peptide hormone, ghrelin...
February 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28164505/association-study-between-ghrelin-gene-polymorphism-and-metabolic-syndrome-in-a-han-chinese-population
#16
Yueyue You, Yaqin Yu, Yanhua Wu, Wenwang Rao, Yangyu Zhang, Yingyu Liu, Guang Yang, Yingli Fu, Jieping Shi, Changgui Kou
BACKGROUND: Ghrelin, in humans, is a hormone secreted from the stomach with an orexigenic effect, which is good for digestion and absorption, as well as regulating physical growth, metabolism, and energy balance. It is also involved in the development of metabolic syndrome (MetS) and type 2 diabetes mellitus (T2DM). This study assessed the association between single nucleotide variants of the GHRL gene and the risk of metabolic syndrome in a Han Chinese population. METHODS: A case-control study was performed on 3780 Han Chinese comprising 1813 MetS cases and 1967 controls...
January 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28156604/efficacy-of-anamorelin-in-cachectic-patients-with-non-small-cell-lung-cancer-nsclc-and-low-bmi-20-kg-m-2-post-hoc-analysis-of-two-phase-iii-studies
#17
Jennifer S Temel, Amy Pickar Abernethy, Ruben Giorgino, John Friend, Kenneth Fearon
: 203 Background: Patients with advanced cancer frequently experience anorexia/cachexia, which can be characterized by weight loss or low BMI, and is associated with reduced function and quality of life. The randomized, phase III, double-blind ROMANA 1 [NCT01387269; N = 484] and ROMANA 2 [NCT01387282; N = 495]) trials in cachectic NSCLC patients demonstrated that the ghrelin receptor agonist anamorelin improved LBM, body weight, fat mass (FM), and symptom burden compared with placebo, and was well tolerated...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28148502/intragastric-infusion-of-denatonium-benzoate-attenuates-interdigestive-gastric-motility-and-hunger-scores-in-healthy-female-volunteers
#18
Eveline Deloose, Pieter Janssen, Maura Corsetti, Jessica Biesiekierski, Imke Masuy, Alessandra Rotondo, Lukas Van Oudenhove, Inge Depoortere, Jan Tack
BACKGROUND: Denatonium benzoate (DB) has been shown to influence ongoing ingestive behavior and gut peptide secretion. OBJECTIVE: We studied how the intragastric administration of DB affects interdigestive motility, motilin and ghrelin plasma concentrations, hunger and satiety ratings, and food intake in healthy volunteers. DESIGN: Lingual bitter taste sensitivity was tested with the use of 6 concentrations of DB in 65 subjects. A placebo or 1 μmol DB/kg was given intragastrically to assess its effect on fasting gastrointestinal motility and hunger ratings, motilin and ghrelin plasma concentrations, satiety, and caloric intake...
February 1, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28147215/attenuated-synovial-fluid-ghrelin-levels-are-linked-with-cartilage-damage-meniscus-injury-and-clinical-symptoms-in-patients-with-knee-anterior-cruciate-ligament-deficiency
#19
Yu-Cong Zou, Liang-Hua Chen, Yong-Liang Ye, Guang-Gang Yang, Zheng Mao, Dan-Dan Liu, Jun-Qi Chen, Jing-Jie Chen, Gang Liu
BACKGROUND: The meniscus injury and post-traumatic knee osteoarthritis (PTOA) following anterior cruciate ligament (ACL) lesions often cause great burdens to patients. Ghrelin, a recently identified 28-amino-acid peptide, has been shown to inhibit inflammation and perform as a growth factor for chondrocyte. OBJECTIVE: This study was aimed at investigating ghrelin concentration in synovial fluid and its association with the degree of meniscus injury, articular degeneration, and clinical severity in patients suffering from anterior cruciate ligament (ACL) deficiency...
December 2016: Discovery Medicine
https://www.readbyqxmd.com/read/28146431/association-of-plasma-ghrelin-levels-and-ghrelin-rs4684677-polymorphism-with-mild-cognitive-impairment-in-type-2-diabetic-patients
#20
Rong Huang, Jing Han, Sai Tian, Rongrong Cai, Jie Sun, Yanjue Shen, Shaohua Wang
BACKGROUND AND AIMS: People with insulin resistance and type 2 diabetes mellitus (T2DM) are at increased risks of cognitive impairment. We aimed to investigate the association of plasma ghrelin levels and ghrelin rs4684677 polymorphism with mild cognitive impairment (MCI) in T2DM patients. RESULTS: In addition to elevated glycosylated hemoglobin (HbA1c), fasting blood glucose (FBG) and homeostasis model assessment of insulin resistance (HOMA-IR), T2DM patients with MCI had decreased plasma ghrelin levels compared with their healthy-cognition subjects (all p < 0...
January 27, 2017: Oncotarget
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