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Ghrelin

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https://www.readbyqxmd.com/read/28101317/corticotropin-releasing-factor-overexpression-in-mice-abrogates-sex-differences-in-body-weight-visceral-fat-and-food-intake-response-to-a-fast-and-alters-levels-of-feeding-regulatory-hormones
#1
Lixin Wang, Miriam Goebel-Stengel, Pu-Qing Yuan, Andreas Stengel, Yvette Taché
BACKGROUND: Corticotropin-releasing factor overexpressing (CRF-OE) male mice showed an inhibited feeding response to a fast, and lower plasma acyl ghrelin and Fos expression in the arcuate nucleus compared to wild-type (WT) mice. We investigated whether hormones and hypothalamic feeding signals are impaired in CRF-OE mice and the influence of sex. METHODS: Male and female CRF-OE mice and WT littermates (4-6 months old) fed ad libitum or overnight fasted were assessed for body, adrenal glands and perigonadal fat weights, food intake, plasma hormones, blood glucose, and mRNA hypothalamic signals...
2017: Biology of Sex Differences
https://www.readbyqxmd.com/read/28100688/the-use-of-oxytocin-to-improve-feeding-and-social-skills-in-infants-with-prader-willi-syndrome
#2
Maïthé Tauber, Kader Boulanouar, Gwenaelle Diene, Sophie Çabal-Berthoumieu, Virginie Ehlinger, Pascale Fichaux-Bourin, Catherine Molinas, Sandy Faye, Marion Valette, Jeanne Pourrinet, Catie Cessans, Sylvie Viaux-Sauvelon, Céline Bascoul, Antoine Guedeney, Patric Delhanty, Vincent Geenen, Henri Martens, Françoise Muscatelli, David Cohen, Angèle Consoli, Pierre Payoux, Catherine Arnaud, Jean-Pierre Salles
BACKGROUND AND OBJECTIVES: Patients with Prader-Willi syndrome (PWS) display poor feeding and social skills as infants and fewer hypothalamic oxytocin (OXT)-producing neurons were documented in adults. Animal data demonstrated that early treatment with OXT restores sucking after birth. Our aim is to reproduce these data in infants with PWS. METHODS: We conducted a phase 2 escalating dose study of a short course (7 days) of intranasal OXT administration. We enrolled 18 infants with PWS under 6 months old (6 infants in each step) who received 4 IU of OXT either every other day, daily, or twice daily...
January 18, 2017: Pediatrics
https://www.readbyqxmd.com/read/28100170/interaction-between-acyl-ghrelin-and-bmi-predicts-clinical-outcomes-in-hemodialysis-patients
#3
Ilia Beberashvili, Inna Sinuani, Ada Azar, Gregory Shapiro, Leonid Feldman, Keren Doenyas-Barak, Kobi Stav, Shai Efrati
BACKGROUND: Ghrelin, a gastric orexigenic peptide, and body mass index (BMI) are known as inversely associated to each other and are both linked to cardiovascular (CV) risk and mortality in maintenance hemodialysis (MHD) patients. However, it is unclear whether the interaction between ghrelin and BMI is associated with a risk of all-cause and CV death in this population. METHODS: A prospective observational study was performed on 261 MHD outpatients (39% women, mean age 68...
January 18, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28098139/appetite-responses-to-high-fat-meals-or-diets-of-varying-fatty-acid-composition-a-comprehensive-review
#4
REVIEW
S Kaviani, J A Cooper
Dietary fatty acids (FA) act as signaling molecules with diverse effects on physiologic function. The aim of this article is to review and summarize the clinical human studies in the literature on how dietary FA composition in meals and diets affects hunger and satiety signaling in the body. Studies examining FA saturation (monounsaturated (MUFA), saturated or polyunsaturated (PUFA) FAs) or FA chain length from high-fat meals/diets were included. Measures of appetite included visual analog scale (VAS) questionnaires, appetite hormones (Cholecystokinin (CCK), glucagon-like peptide-1 (GLP-1), peptide YY (PYY), gastric insulinotropic polypeptide gastric inhibitory peptide (GIP), ghrelin, leptin, insulin) and/or energy intake (EI) data...
January 18, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28096522/control-of-food-intake-by-gastrointestinal-peptides-mechanisms-of-action-and-possible-modulation-in-the-treatment-of-obesity
#5
REVIEW
Philip Prinz, Andreas Stengel
This review focuses on the control of appetite by food intake-regulatory peptides secreted from the gastrointestinal tract, namely cholecystokinin, glucagon-like peptide 1, peptide YY, ghrelin, and the recently discovered nesfatin-1 via the gut-brain axis. Additionally, we describe the impact of external factors such as intake of different nutrients or stress on the secretion of gastrointestinal peptides. Finally, we highlight possible conservative-physical activity and pharmacotherapy-treatment strategies for obesity as well as surgical techniques such as deep brain stimulation and bariatric surgery also altering these peptidergic pathways...
January 17, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28093190/ghrelin-fibers-from-lateral-hypothalamus-project-to-nucleus-tractus-solitaries-and-are-involved-in-gastric-motility-regulation-in-cisplatin-treated-rats
#6
Yanling Gong, Yang Liu, Fei Liu, Shasha Wang, Hong Jin, Feifei Guo, Luo Xu
Ghrelin can alleviate cancer chemotherapy-induced dyspepsia in rodents, though the neural mechanisms involved are not known. Therefore, ghrelin projections from the lateral hypothalamus (LH) and its involvement in the regulation of gastric motility in cisplatin-treated rats were investigated with a multi-disciplined approach. Retrograde tracing combined with fluoro-immunohistochemical staining were used to investigate ghrelin fiber projections arising from LH and projecting to nucleus tractus solitaries (NTS)...
January 13, 2017: Brain Research
https://www.readbyqxmd.com/read/28089858/glucose-amino-acids-and-fatty-acids-directly-regulate-ghrelin-and-nucb2-nesfatin-1-in-the-intestine-and-hepatopancreas-of-goldfish-carassius-auratus-in-vitro
#7
Juan Ignacio Bertucci, Ayelén Melisa Blanco, Luis Fabián Canosa, Suraj Unniappan
Ghrelin and nesfatin-1 are two peptidyl hormones primarily involved in food intake regulation. We previously reported that the amount of dietary carbohydrates, protein and lipids modulates the expression of these peptides in goldfish in vivo. In the present work, we aimed to characterize the effects of single nutrients on ghrelin and nesfatin-1 in the intestine and hepatopancreas. First, immunolocalization of ghrelin and NUCB2/nesfatin-1 in goldfish hepatopancreas cells was studied by immunohistochemistry. Second, the effects of 2 and 4h-long exposures of cultured intestine and hepatopancreas sections to glucose, L-tryptophan, oleic acid, linolenic acid (LNA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on ghrelin and nesfatin-1 gene and protein expression were studied...
January 13, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28078800/ghrelin-ameliorates-blood-brain-barrier-disruption-in-the-systemic-hypoxia
#8
Gisou Mohaddes, Jalal Abdolalizadeh, Shirin Babri, Fezzeh Hossienzadeh
The blood brain barrier (BBB), which serves to protect homeostasis of the central nervous system, is formed by tight junction proteins. Several studies have indicated that systemic hypoxia leads to cerebral edema through disruption of the tight junction proteins such as occludin and zonula occludens-1 (ZO-1). According to our previous studies ghrelin attenuates cerebral edema in the hypoxic brain. However, its mechanisms are not completely understood. The present study was aimed to determine the effect of ghrelin on occludin and Zo-1 in the hypoxic brain...
January 11, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28076453/ferulic-acid-lowers-body-weight-and-visceral-fat-accumulation-via-modulation-of-enzymatic-hormonal-and-inflammatory-changes-in-a-mouse-model-of-high-fat-diet-induced-obesity
#9
T S de Melo, P R Lima, K M M B Carvalho, T M Fontenele, F R N Solon, A R Tomé, T L G de Lemos, S G da Cruz Fonseca, F A Santos, V S Rao, M G R de Queiroz
Previous studies have reported on the glucose and lipid-lowering effects of ferulic acid (FA) but its anti-obesity potential has not yet been firmly established. This study investigated the possible anti-obesitogenic effects of FA in mice fed a high-fat diet (HFD) for 15 weeks. To assess the antiobesity potential of FA, 32 male Swiss mice, weighing 20-25 g (n=6-8 per group) were fed a normal diet (ND) or HFD, treated orally or not with either FA (10 mg/kg) or sibutramine (10 mg/kg) for 15 weeks and at the end of this period, the body weights of animals, visceral fat accumulation, plasma levels of glucose and insulin hormone, amylase and lipase activities, the satiety hormones ghrelin and leptin, and tumor necrosis factor-α (TNF-α) and monocyte chemoattractant protein-1 (MCH-1) were analyzed...
January 5, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28072871/atrophic-and-metaplastic-progression-in-the-background-mucosa-of-patients-with-gastric-adenoma
#10
Hee Kyong Na, Charles J Cho, Suh Eun Bae, Jeong Hoon Lee, Young Soo Park, Ji Yong Ahn, Do Hoon Kim, Kee Don Choi, Ho June Song, Gin Hyug Lee, Se Jin Jang, Hwoon-Yong Jung
BACKGROUND: In patients with adenoma, assessing premalignant changes in the surrounding mucosa is important for surveillance. This study evaluated atrophic and metaplastic progression in the background mucosa of adenoma or early gastric cancer (EGC) cases. METHODS: Among 146 consecutive patients who underwent endoscopic resection for intestinal-type gastric neoplasia, the adenoma group included 56 patients with low-grade dysplasia and the ECG group included 90 patients with high-grade dysplasia or invasive carcinoma...
2017: PloS One
https://www.readbyqxmd.com/read/28068626/effects-of-the-activation-of-heme-oxygenase-1-on-hormonal-and-metabolic-changes-in-rats-fed-a-high-fat-diet
#11
Tomasz Szkudelski, Kamila Dłużewicz, Jan Sadoch, Katarzyna Szkudelska
Heme oxygenase-1 (HO-1) is the inducible isoform of the heme oxygenase system, which catalyzes heme degradation. Up-regulation of this enzyme under pathological conditions is associated with beneficial effects in the whole organism. However, the potential of HO-1 in the alleviation of disturbances induced by a high-fat diet (HFD) is poorly elucidated. The present study was undertaken to determine the effects of pharmacological activation of HO-1 by hemin on some hormones and metabolic parameters in rats fed an HFD for 8 weeks...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28067437/the-effect-of-glutamate-on-ghrelin-release-in-mice
#12
Rakhi Chacrabati, Zhi Gong, Chika Ikenoya, Daisuke Kondo, Jeffrey M Zigman, Takafumi Sakai, Ichiro Sakata
Ghrelin is abundantly produced in the stomach. Here, we found that glutamate decreased ghrelin expression and release in ghrelin-producing cells, and decreased levels of food intake and plasma acyl-ghrelin in mice. Treatment with siRNA of G protein-coupled receptor, family C, group 5, member B (GPRC5B) in ghrelin-producing cell lines completely blocked the effect of glutamate-induced ghrelin suppression. In addition, glutamate inhibited ghrelin release via the extracellular signal-regulated kinase (ERK) activity pathway, and stimulated CREB2 mRNA expression in ghrelin-producing cell lines...
January 9, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28063509/function-of-obestatin-in-the-digestive-system
#13
REVIEW
Yue-Xian Xing, Liu Yang, Hong-Yu Kuang, Xin-Yuan Gao, Hao-Ling Liu
Physical health has a direct relationship with digestive function. Any abnormalities in the link may cause malnutrition, endocrine disorders, and the decline of organ functions. Obestatin, a biologically active peptide, is encoded by the ghrelin gene. Most studies suggest that obestatin is a pleiotropic peptide, which acts by suppressing the motility of the gastrointestinal tract, regulating the secretion of insulin, reducing inflammation and apoptosis, and promoting proliferation. These characteristics suggest that obestatin may represent an efficient way to prevent the occurrence and development of some digestive diseases...
February 2017: Nutrition
https://www.readbyqxmd.com/read/28058025/relationship-between-ghrelin-helicobacter-pylori-and-gastric-mucosal-atrophy-in-hemodialysis-patients
#14
Hitomi Ichikawa, Mitsushige Sugimoto, Yukitoshi Sakao, Shu Sahara, Naro Ohashi, Akihiko Kato, Ken Sugimoto, Takahisa Furuta, Akira Andoh, Tadashi Sakao, Hideo Yasuda
AIM: To investigate the relationship between plasma ghrelin level, Helicobacter pylori (H. pylori) infection status and the severity of atrophy in hemodialysis patients. METHODS: One hundred eights patients who received hemodialysis and 13 non-hemodialysis H. pylori-negative controls underwent gastroduodenoscopy to evaluate the severity of gastric atrophy. Serum levels of pepsinogen (PG) were measured as serum markers of gastric atrophy. H. pylori infection was evaluated by anti-H...
December 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28057770/neuroendocrine-integration-of-nutritional-signals-on-reproduction
#15
Maggie Corr Evans, Greg Anderson
Reproductive function in mammals is energetically costly and therefore tightly regulated by nutritional status. To enable this integration of metabolic and reproductive function, information regarding peripheral nutritional status must be relayed centrally to the gonadotropin-releasing hormone (GnRH) neurons that drive reproductive function. The metabolically relevant hormones leptin, insulin and ghrelin have been identified as key mediators of this 'metabolic control of fertility'. However, the neural circuitry through which they act to exert their control over GnRH drive remains incompletely understood...
January 5, 2017: Journal of Molecular Endocrinology
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
#16
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/28055030/prognostic-significance-of-preoperative-and-postoperative-plasma-levels-of-ghrelin-in-gastric-cancer-3-year-survival-study
#17
Saeed Soleyman-Jahi, Afshin Abdirad, Amir Afraz Fallah, Sevil Ghasemi, Fatemeh Sadeghi, Reza Heidari, Habibollah Mahmoodzadeh, Kazem Zendehdel
OBJECTIVES: We aimed to investigate prognostic effects of plasma levels of ghrelin before and after gastrectomy in gastric cancer (GC). METHODS: We followed 81 GC patients up to 3 years in this study. They were candidates for curative gastrectomy with or without neoadjuvant chemotherapy. Plasma levels of total and active ghrelins before and after the operation were assessed. Association of plasma levels of ghrelin with survival were assessed and adjusted for other potential prognostic factors using Cox regression analyses...
January 5, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28055028/the-role-of-gut-brain-axis-in-regulating-glucose-metabolism-after-acute-pancreatitis
#18
Sayali A Pendharkar, Varsha M Asrani, Rinki Murphy, Richard Cutfield, John A Windsor, Maxim S Petrov
OBJECTIVES: Diabetes has become an epidemic in developed and developing countries alike, with an increased demand for new efficacious treatments. A large body of pre-clinical evidence suggests that the gut-brain axis may be exploited as a potential therapeutic target for defective glucose homeostasis. This clinical study aimed to investigate a comprehensive panel of glucoregulatory peptides, released by both the gut and brain, in individuals after acute pancreatitis. METHODS: Fasting levels of glucagon-like peptide-1 (GLP-1), glicentin, oxyntomodulin, peptide YY, ghrelin, cholecystokinin, vasoactive intestinal peptide (VIP), and secretin were studied...
January 5, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28054308/inhibition-of-ghrelin-induced-feeding-in-rats-by-pretreatment-with-a-novel-dual-orexin-receptor-antagonist
#19
Mariko So, Hirofumi Hashimoto, Reiko Saito, Yukiyo Yamamoto, Yasuhito Motojima, Hiromichi Ueno, Satomi Sonoda, Mitsuhiro Yoshimura, Takashi Maruyama, Koichi Kusuhara, Yoichi Ueta
Orexin-A and -B, and ghrelin are potent orexigenic peptides. The effects of ACT462206, a novel dual orexin receptor antagonist (DORA), on ghrelin-induced feeding were examined in adult male Wistar rats. Hyperphagia induced by the intracerebroventricular (icv) administration of ghrelin was significantly suppressed for at least 2 h by pretreatment with icv administration of DORA. A marked increase was observed in the number of neurons showing Fos immunoreactivity in the paraventricular nucleus, arcuate nucleus and lateral hypothalamic area (LHA), 90 min after icv administration of ghrelin...
January 4, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28047017/su-c-204-07-radiation-therapy-as-a-potential-treatment-for-obesity-initial-data-from-a-preclinical-investigation
#20
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
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