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Obestatin

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https://www.readbyqxmd.com/read/28522824/obestatin-controls-skeletal-muscle-fiber-type-determination
#1
Icía Santos-Zas, Tania Cid-Díaz, Jessica González-Sánchez, Uxía Gurriarán-Rodriguez, Carlos Seoane-Mosteiro, Begoña Porteiro, Rubén Nogueiras, Xesús Casabiell, José Luis Relova, Rosalía Gallego, Vincent Mouly, Yolanda Pazos, Jesus P Camiña
Obestatin/GPR39 signaling stimulates skeletal muscle growth and repair by inducing both G-protein-dependent and -independent mechanisms linking the activated GPR39 receptor with distinct sets of accessory and effector proteins. In this work, we describe a new level of activity where obestatin signaling plays a role in the formation, contractile properties and metabolic profile of skeletal muscle through determination of oxidative fiber type. Our data indicate that obestatin regulates Mef2 activity and PGC-1α expression...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28502329/serum-adipocytokine-levels-as-surrogate-markers-for-disease-activity-of-crohn-s-disease
#2
Su Hwan Kim, Seung Hyeon Jang, Ji Won Kim, Byeong Gwan Kim, Kook Lae Lee, You Sun Kim, Dong Soo Han, Joo Sung Kim
BACKGROUND: Determining inflammatory activity is crucial for assessing disease activity and for tailoring therapy in patients with Crohn׳s disease (CD). This study aimed to evaluate adipocytokine levels in patients with CD and to determine whether they can serve as surrogate markers for disease activity. MATERIALS AND METHODS: Serum samples and information regarding the clinical features of patients in the CD Network Project registry were collected from March 2009 to February 2012...
May 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28477305/long-term-obestatin-treatment-of-mice-type-2-diabetes-increases-insulin-sensitivity-and-improves-liver-function
#3
Paweł A Kołodziejski, Ewa Pruszyńska-Oszmałek, Mathias Z Strowski, Krzysztof W Nowak
PURPOSE: Obestatin and ghrelin are peptides encoded by the preproghrelin gene. Obestatin inhibits food intake, in addition to regulation of glucose and lipid metabolism. Here, we test the ability of obestatin at improving metabolic control and liver function in type 2 diabetic animals (type 2 diabetes mellitus). METHODS: The effects of chronic obestatin treatment of mice with experimentally induced type 2 diabetes mellitus on serum levels of glucose and lipids, and insulin sensitivity are characterized...
May 5, 2017: Endocrine
https://www.readbyqxmd.com/read/28473748/combination-of-selective-immunoassays-and-mass-spectrometry-to-characterize-preproghrelin-derived-peptides-in-mouse-tissues
#4
Rim Hassouna, Dominique Grouselle, Giovanni Chiappetta, Joanna Lipecka, Oriane Fiquet, Catherine Tomasetto, Joëlle Vinh, Jacques Epelbaum, Virginie Tolle
Preproghrelin is a prohormone producing several preproghrelin-derived peptides with structural and functional heterogeneity: acyl ghrelin (AG), desacyl ghrelin (DAG), and obestatin. The absence of selective and reliable assays to measure these peptides simultaneously in biological samples has been a limitation to assess their real proportions in tissues and plasma in physiological and pathological conditions. We aimed at reliably measure the ratio between the different preproghrelin-derived peptides in murine tissues using selective immunoassays combined with a highly sensitive mass spectrometry method...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28472020/obestatin-plays-beneficial-role-in-cardiomyocyte-injury-induced-by-ischemia-reperfusion-in-vivo-and-in-vitro
#5
Qin Zhang, Xin-Wei Dong, Jia-Ying Xia, Ke-Ying Xu, Zhe-Rong Xu
BACKGROUND Obestatin, primarily recognized as a peptide within the gastrointestinal system, has been shown to benefit the cardiovascular system. We designed this experiment to study the protective role and underlying mechanism of obestatin against ischemia-reperfusion(I/R) injury in myocardial cells. MATERIAL AND METHODS In an In vivo experiment, LAD was ligated for 0.5 h and then opened for reperfusion with obestatin for 24 h. Then, the infarction area was shown with TTC staining, and inflammation factors in serum were analyzed by qRT-PCR...
May 4, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28453173/correlation-analysis-of-serum-obestatin-expression-with-insulin-resistance-in-childhood-obesity
#6
M Y Zhang, F Li, J P Wang
Childhood obesity is a serious public health concern condition, as excess body fat can negatively affect a child's health. Obestatin is a hormone that regulates body weight by suppressing appetite and reducing food intake; fasting obestatin level is negatively correlated with basal insulin level. This study aims to investigate the role of obestatin in insulin resistance. A total of 54 children with simple obesity and 57 healthy controls were recruited. Levels of serum insulin, fasting blood glucose, cholesterol, triglyceride, low-density lipoprotein, and high-density lipoprotein were measured...
April 28, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28428639/obestatin-stimulates-glucose-induced-insulin-secretion-through-ghrelin-receptor-ghs-r
#7
Geetali Pradhan, Chia-Shan Wu, Jong Han Lee, Preeti Kanikarla, Shaodong Guo, Vijay K Yechoor, Susan L Samson, Yuxiang Sun
Orexigenic hormone ghrelin and anorexic hormone obestatin are encoded by the same preproghrelin gene. While it is known that ghrelin inhibits glucose-stimulated insulin secretion (GSIS), the effect of obestatin on GSIS is unclear. Ghrelin's effect is mediated by its receptor Growth Hormone Secretagogue Receptor (GHS-R), but the physiologically relevant receptor of obestatin remains debatable. Here we have investigated the effect of obestatin on GSIS in vitro, in vivo and ex vivo, and tested whether obestatin regulates insulin secretion through GHS-R...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422951/helicobacter-pylori-infection-and-serum-leptin-obestatin-and-ghrelin-levels-in-mexican-schoolchildren
#8
Carolina Romo-González, Eugenia Mendoza, Robertino M Mera, Rafael Coria-Jiménez, Patricia Chico-Aldama, Rita Gomez-Diaz, Ximena Duque
BACKGROUND: There is little information about the possible role of H. pylori infection on appetite-regulating peptides in children. This study evaluated the association between H. pylori infection and serum levels of ghrelin, leptin, and obestatin in schoolchildren. METHODS: One hundred seventy-eight schoolchildren, students at boarding schools in Mexico City, participated. H. pylori infection status was determined every six months for one year by a breath test using (13)C-urea; schoolchildren with consistently positive or negative results were selected to participate...
April 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28419141/ghrelin-is-a-prognostic-marker-and-a-potential-therapeutic-target-in-breast-cancer
#9
Malin Grönberg, Cecilia Ahlin, Ylva Naeser, Eva Tiensuu Janson, Lars Holmberg, Marie-Louise Fjällskog
Ghrelin and obestatin are gastrointestinal peptides, encoded by the same preproghrelin gene. Both are expressed in breast cancer tissue and ghrelin has been implicated in breast cancer tumorigenesis. Despite recent advances in breast cancer management the need for new prognostic markers and potential therapeutic targets in breast cancer remains high. We studied the prognostic impact of ghrelin and obestatin in women with node negative breast cancer. Within a cohort of women with breast cancer with tumor size ≤ 50 mm, no lymph node metastases and no initiation of adjuvant chemotherapy, 190 women were identified who died from breast cancer and randomly selected 190 women alive at the corresponding time as controls...
2017: PloS One
https://www.readbyqxmd.com/read/28419119/plasma-ghrelin-level-and-plasma-ghrelin-obestatin-ratio-are-related-to-intestinal-metaplasia-in-elderly-patients-with-functional-dyspepsia
#10
Su Hwan Kim, Ji Won Kim, Junsu Byun, Ji Bong Jeong, Byeong Gwan Kim, Kook Lae Lee
BACKGROUND: Whether plasma ghrelin/obestatin levels are associated with Helicobacter pylori (H. pylori) infection, subtypes of functional dyspepsia (FD), and gastric mucosal histology has not yet been established in elderly patients. OBJECTIVE: The aim of this study was to determine whether plasma ghrelin and obestatin levels are related to gastric mucosal histology, H. pylori infection, and FD subtypes in elderly patients with FD. METHODS: Ninety-two patients diagnosed with FD and older than 60 years (median age 69...
2017: PloS One
https://www.readbyqxmd.com/read/28223092/obestatin-improves-oxidative-brain-damage-and-memory-dysfunction-in-rats-induced-with-an-epileptic-seizure
#11
Türkan Koyuncuoğlu, Caner Vızdıklar, Doğan Üren, Hakan Yılmaz, Çağan Yıldırım, Sefa Semih Atal, Dilek Akakın, Elif Kervancıoğlu Demirci, Meral Yüksel, Berrak Ç Yeğen
Obestatin was shown to alleviate renal, gastrointestinal and haemorrhage-induced brain injury in rats. In order to investigate the neuroprotective effects of obestatin on seizure-induced oxidative brain injury, an epileptic seizure was induced with a single intraperitoneal (i.p.) dose of pentylenetetrazole (PTZ, 45mg/kg) in male Wistar rats. Thirty minutes before the PTZ injection, rats were treated with either saline or obestatin (1μg/kg, i.p.). Seizure was video-taped and then evaluated by using Racine's scoring (0-5)...
February 20, 2017: Peptides
https://www.readbyqxmd.com/read/28212895/the-influence-of-enteral-obestatin-administration-to-suckling-rats-on-intestinal-contractility
#12
M Słupecka, P Grzesiak, J Kwiatkowski, M Gajewska, A Kuwahara, I Kato, J Woliński
This study investigated the effect of enteral administration of obestatin on the contractility of whole-thickness preparations of duodenum and middle jejunum, as well as on the morphology of the enteric nervous system (ENS). Suckling rats were assigned to 3 groups (n=12) treated with: C-saline solution; LO-obestatin (125nmol/kgb.wt); HO-obestatin (250nmol/kgb.wt). Saline solution or obestatin were administered twice daily, from the 14th to the 21st day of life. Sections were studied in an organ bath, for isometric recording in the presence of acetylocholine (ACh), atropine (ATR) and tetradotoxin (TTX)...
February 16, 2017: General and Comparative Endocrinology
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...
March 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28091434/serum-obestatin-and-omentin-levels-in-patients-with-diabetic-nephropathy
#15
M Zorlu, M Kiskac, E M Güler, I Gültepe, E Yavuz, K Çelik, A Kocyigit
INTRODUCTION: Diabetic nephropathy is the leading cause of chronic kidney disease and accounts for almost 45% of all new patients requiring renal replacement therapy. Omentin and obestatin, two novel proteins were suggested to be associated with insulin resistance, type 2 diabetes and cardiovascular risk factors. Thus, we postulated that they may also have an association with diabetic nephropathy which is known to be an independent cardiovascular risk factor. In order to investigate such an association we compared serum omentin and obestatin levels in type 2 diabetic patients with normoalbuminuria (NA) and macroalbuminuria (MA)...
February 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28063509/function-of-obestatin-in-the-digestive-system
#16
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/27901469/obestatin-improves-hepatic-injury-induced-by-ischemia-reperfusion-in-rats-role-of-nitric-oxide
#17
Ola A El-Gohary
Hepatic ischemia/reperfusion (I/R) injury is a common clinical problem. The present study was conducted to evaluate the protective effect of obestatin against I/R-induced liver injury. Rats were divided into three groups (n = 10): control sham-operated group, I/R group and obestatin treatment group. Rats of I/R group and obestatin treatment group underwent partial hepatic ischemia for 60 min followed by 90 min reperfusion. At the beginning of the 90-min reperfusion period, rats of obestatin treatment group were injected with obestatin (100 μg/kg) intravenously...
January 2017: General Physiology and Biophysics
https://www.readbyqxmd.com/read/27900560/serum-leptin-obestatin-and-ghrelin-levels-and-gastric-emptying-rates-of-liquid-and-solid-meals-in-non-obese-rats-with-roux-en-y-bypass-surgery-or-prosthesis-placement-implications-for-the-role-of-vagal-afferents
#18
Yunus Yavuz, Zarife Nigar Özdemir Kumral, Gülsün Memi, Özge Dağdeviren Çevik, Cumhur Yeğen, Berrak Ç Yeğen
BACKGROUND: The present study aimed to investigate the effects of Roux-en-Y gastric bypass (RYGB) and prosthesis placement on gastric emptying rate in conjunction with serum ghrelin-obestatin-leptin responses in non-obese rats with intact or denervated afferent innervation. METHODS: Under anesthesia, male Sprague-Dawley rats underwent either sham operation, RYGB, prosthesis, and/or Gregory cannula placement. Three weeks later, liquid or solid gastric emptying tests were performed and serum ghrelin, leptin and obestatin levels were measured...
November 29, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27825986/intracerebroventricular-injection-of-ghrelin-decreases-wheel-running-activity-in-rats
#19
Yumiko Miyatake, Tetsuya Shiuchi, Kazuaki Mawatari, Satomi Toda, Yasuko Taniguchi, Akari Futami, Fukiko Sato, Masashi Kuroda, Mayu Sebe, Rie Tsutsumi, Nagakatsu Harada, Yasuhiko Minokoshi, Tadahiro Kitamura, Koro Gotoh, Masaki Ueno, Yutaka Nakaya, Hiroshi Sakaue
There is an increasing interest in elucidating the molecular mechanisms by which voluntary exercise is regulated. In this study, we examined how the central nervous system regulates exercise. We used SPORTS rats, which were established in our laboratory as a highly voluntary murine exercise model. SPORTS rats showed lower levels of serum ghrelin compared with those of the parental line of Wistar rats. Intracerebroventricular and intraperitoneal injection of ghrelin decreased wheel-running activity in SPORTS rats...
January 2017: Peptides
https://www.readbyqxmd.com/read/27782745/obestatin-modulates-ghrelin-s-effects-on-the-basal-and-stimulated-testosterone-secretion-by-the-testis-of-rat-an-in-vitro-study
#20
T Afsar, S Jahan, S Razak, A Almajwal, M Abulmeaty, H Wazir, A Majeed
The functional antagonism between obestatin and ghrelin in testis is under investigated. We investigated the ability of obestatin to counteract the inhibitory effect of ghrelin on basal and stimulated testosterone (T) secretion in vitro. Testicular strips from adult rats were incubated with 10 ng/ml and 100 ng/ml of obestatin alone, ghrelin alone and obestatin + ghrelin. Obestatin modulation of stimulated T secretion was evaluated by incubation of testicular samples with 10 ng/ml and 100 ng/ml obestatin, ghrelin and obestatin+ ghrelin in the absence and presence of 10 IU of human chorionic gonadotrophin (hCG)...
October 26, 2016: Physiological Research
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