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Amal Akour, Violet Kasabri, Nailya Boulatova, Yasser Bustanji, Randa Naffa, Dana Hyasat, Nahla Khawaja, Haidar Bustanji, Ayman Zayed, Munther Momani
AIMS: Type 2 diabetes mellitus (T2DM) and prediabetes (pre-DM) are associated with changes in levels of metabolic markers. The main aim of this study is to compare the levels of omentin, irisin, endothelin-1, nesfatin, hepatocyte growth factor (HGF), fibroblast growth factor, and oxytocin (OXT) between normoglycemic and pre-DM/T2DM obese Jordanian patients. METHODS: One hundred and ninety-eight adult Jordanian subjects were recruited. Demographic data and clinical parameters were collected...
October 18, 2016: Acta Diabetologica
Mohamed Abu-Farha, Irina Al-Khairi, Preethi Cherian, Betty Chandy, Devarajan Sriraman, Asma Alhubail, Faisal Al-Refaei, Abdulmohsen AlTerki, Jehad Abubaker
BACKGROUND: Hypertriglyceridemia is associated with increased risk for cardiovascular diseases and type 2 diabetes (T2D). Angiopoietin like proteins particularly 3, 4 and recently 8 are well established regulators of plasma triglyceride level through regulating the activity of lipoprotein lipase. Plasma level and association between ANGPTL3, 4 and 8 is not well established in human subjects. This study was designed to establish the level of these proteins in plasma and adipose tissues and investigate the association between ANGPTL8 with ANGPTL3 and 4 in T2D and non-diabetics subjects...
October 13, 2016: Lipids in Health and Disease
Junling Fu, Cong Hou, Lujiao Li, Dan Feng, Ge Li, Mingyao Li, Changhong Li, Shan Gao, Ming Li
BACKGROUND: Betatrophin has been recently reported to play a role in glucose homeostasis by inducing beta-cell proliferation in mice. However, studies in human are inconsistent. As a nutritionally-regulated liver-enriched factor, we hypothesize that betatrophin might be regulated by vitamin D, and ignorance of vitamin D status may explain the discrepancy in previous human studies. The aims of this study were to assess the association between circulating betatrophin and glucose homeostasis as well as other cardiometabolic variables in a cohort of youths at risk for metabolic syndrome and test the possible influence of vitamin D status on the association...
October 6, 2016: Cardiovascular Diabetology
Gulcin Sahin Ersoy, Tugba Altun Ensari, Dogan Vatansever, Volkan Emirdar, Ozge Cevik
OBJECTIVE: To determine the levels of WISP1 and betatrophin in normal weight and obese women with polycystic ovary syndrome (PCOS) and to assess their relationship with anti-Müllerian hormone (AMH) levels, atherogenic profile and metabolic parameters Methods: In this prospective cross-sectional study, the study group was composed of 49 normal weighed and 34 obese women with PCOS diagnosed based on the Rotterdam criteria; 36 normal weight and 26 obese age matched non-hyperandrogenemic women with regular menstrual cycle...
September 30, 2016: Gynecological Endocrinology
Mohamed Abu-Farha, Ashraf Al Madhoun, Jehad Abubaker
Diabetes is a global health problem that is caused by impaired insulin production from pancreatic β-cells. Efforts to regenerate β-cells have been advancing rapidly in the past two decades with progress made towards identifying new agents that induce β-cells regeneration. ANGPTL8, also named betatrophin, has been recently identified as a hormone capable of inducing β-cells proliferation and increasing β-cells mass in rodents. Its discovery has been cherished as a breakthrough and a game changer in the field of β-cells regeneration...
2016: Journal of Diabetes Research
Shumin Song, Jia Wang, Chenghui Guo, Tiejian Jiang
OBJECTIVE: To determine serum levels of betatrophin in patients with polycystic ovary syndrome (PCOS) and the influential factors. 
 METHODS: A total of 100 PCOS patients were enrolled randomly as a PCOS group, and 40 age-matched healthy women were recruited as a normal control (NC) group. Primary clinical or biochemical parameters of the subjects were detected. The results were analyzed by SPSS 19.0.
 RESULTS: Serum betatrophin levels were elevated in the PCOS group compared with the NC group...
September 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
Amani Al-Rawashdeh, Violet Kasabri, Nailya Bulatova, Amal Akour, Ayman Zayed, Munther Momani, Nahla Khawaja, Haider Bustanji, Dana Hyasat
BACKGROUND: Oxytocin (OXT) is a neurohypophyseal hormone that has been recently shown to possess a number of beneficial effects in diabetes and obesity. Betatrophin is a protein expressed in fat and liver that regulates lipid metabolism and promotes pancreatic β-cell proliferation. It is not investigated yet whether OXT and betatrophin levels correlate in metabolic syndrome (MS) or diabetes patients. METHODS: The aim was to assess correlations between plasma betatrophin and OXT levels in MS-diabetic or prediabetic (N=89) as compared to MS-non-diabetic (N=69) patients...
August 22, 2016: Diabetes & Metabolic Syndrome
A Zielińska, R Maciulewski, K Siewko, A Popławska-Kita, D Lipińska, G Kozłowska, M Górska, M Szelachowska
AIM: Evidence in support of an association between betatrophin and insulin resistance (IR) is mounting, with studies demonstrating that betatrophin is elevated in patients with type 2 diabetes, obesity and gestational diabetes. The aim of this study was to evaluate the role of betatrophin in IR and physiological proliferation of beta cells during pregnancy in healthy women. METHODS: Eighty healthy pregnant women were examined at each trimester [T1 (first), T2 (second), T3 (third)], with a subgroup (n=45) that was also examined at 3 months postpartum (3MPP)...
August 20, 2016: Diabetes & Metabolism
Dan Liu, Hua Qu, Hang Wang, Yang Duan, Fang Liu, Zhengping Feng, Huacong Deng
AIMS: To examine circulating betatrophin concentrations in subjects with different glucose tolerance status and to investigate the relationship between serum betatrophin levels and first-phase of glucose-stimulated insulin secretion. METHODS: Serum betatrophin concentrations were measured in 110 age- and sex-matched subjects: 47 newly diagnosed type 2 diabetes mellitus (T2DM), 29 impaired glucose tolerance (IGT) and 34 normal glucose tolerance (NGT). Oral glucose tolerance test and intravenous glucose tolerance test were performed to assess glucose tolerance and first-phase of glucose-stimulated insulin secretion...
August 20, 2016: Obesity Research & Clinical Practice
Javier Gómez-Ambrosi, Eider Pascual-Corrales, Victoria Catalán, Amaia Rodríguez, Beatriz Ramírez, Sonia Romero, Neus Vila, Patricia Ibáñez, María A Margall, Camilo Silva, María J Gil, Javier Salvador, Gema Frühbeck
CONTEXT: Angiopoietin-like protein 8 (ANGPTL8)/betatrophin is a secreted protein initially involved in β-cell replication. Recent data in humans and mice models suggest that ANGPTL8/betatrophin is more related to lipid metabolism. OBJECTIVE: The aim of the present study was to compare the circulating concentrations of ANGPTL8/betatrophin in individuals with dyslipidemia defined as having high or low levels of high-density lipoprotein (HDL)-cholesterol or triglycerides, respectively...
October 2016: Journal of Clinical Endocrinology and Metabolism
Lukas Maurer, Sebastian Brachs, Anne-Marie Decker, Maria Brachs, Verena Leupelt, Reiner Jumpertz von Schwartzenberg, Andrea Ernert, Thomas Bobbert, Heiko Krude, Joachim Spranger, Knut Mai
CONTEXT: Recently a potential role of betatrophin was shown in the postprandial switch from lipid to glucose metabolism. OBJECTIVE: To analyse whether obesity is associated with altered postprandial betatrophin response and whether this could be restored by weight loss. Design, Setting, Participants, Intervention: Oral glucose load was performed in 12 lean individuals at baseline as well as in 20 obese subjects before and after a 12-week structured weight loss program at an endocrinology research center...
July 26, 2016: Journal of Clinical Endocrinology and Metabolism
Aaron R Cox, Ornella Barrandon, Erica P Cai, Jacqueline S Rios, Julia Chavez, Claire W Bonnyman, Carol J Lam, Peng Yi, Douglas A Melton, Jake A Kushner
The β-cell mitogenic effects of ANGPTL8 have been subjected to substantial debate. The original findings suggested that ANGPTL8 overexpression in mice induced a 17-fold increase in β-cell proliferation. Subsequent studies in mice contested this claim, but a more recent report in rats supported the original observations. These conflicting results might be explained by variable ANGPTL8 expression and differing methods of β-cell quantification. To resolve the controversy, three independent labs collaborated on a blinded study to test the effects of ANGPTL8 upon β-cell proliferation...
2016: PloS One
Christian L Roth, Clinton Elfers, Nina Lass, Thomas Reinehr
OBJECTIVE: The influences of obesity, glucose metabolism, gender, and puberty on betatrophin levels and the longitudinal relationships between weight loss, metabolic changes and betatrophin have not yet been studied in childhood. METHODS: Cross-sectional and longitudinal analysis of weight status (standard deviation score-body mass index (SDS-BMI)), homeostasis model assessment insulin resistance (HOMA-IR), gender, and pubertal stage were evaluated in 69 obese children (51% female, age 11...
July 12, 2016: Pediatric Diabetes
Yun Huang, Chen Fang, Zhimin Ma, Heming Guo, Ruihua Wang, Ji Hu
Purpose betatrophin has been reported to boost β cell expansion in insulin resistant states. Pregnancy is a well-recognized physiological state of insulin resistance. Betatrophin levels in pregnant women and their relationships with metabolic variables remain to be elucidated. Methods A total of 49 pregnant women and 31 age-matched unpregnant women with normal glucose regulation (UP-NGR) were included. Among these subjects, according to results from 75 g oral glucose tolerance test (OGTT), 22 women were diagnosed as having gestational diabetes mellitus (GDM)...
June 2016: Revista Brasileira de Ginecologia e Obstetrícia
Haoyu Wang, Yaxin Lai, Cheng Han, Aihua Liu, Chenling Fan, Hong Wang, Hongmei Zhang, Shuangning Ding, Weiping Teng, Zhongyan Shan
ANGPTL8/betatrophin is a recently discovered hormone, which mainly synthesized and secreted by liver and adipose tissue, playing a critical role in pancreatic beta cell proliferation. Previous studies have suggested that serum ANGPTL8/betatrophin levels are associated with obesity and diabetes mellitus. Here, we evaluated the prospective association between ANGPTL8/betatrophin and the metabolic syndrome from a community-based cohort of 153 adults without metabolic syndrome. After 3.5-year follow-up, we observed an inverse correlation between the baseline ANGPTL8/betatrophin levels and the incidence of metabolic syndrome, even after multivariate adjustments...
2016: Scientific Reports
Nasser M Al-Daghri, Shakilur Rahman, Shaun Sabico, Osama E Amer, Kaiser Wani, Mohammed Ghouse Ahmed Ansari, Omar S Al-Attas, Sudhesh Kumar, Majed S Alokail
AIMS: Betatrophin, a newly identified liver and adipose tissue-derived hormone, has been suggested as an inducer of β-cell proliferation in mice. However, the physiological role of betatrophin remains poorly understood in humans. Hence, the aim of this study was to investigate circulating betatrophin concentrations in normal and type 2 diabetes mellitus (T2DM) Saudi subjects and its association with various metabolic parameters. METHODS: In this cross-sectional study, 200 Saudi adults (81 healthy non-T2DM controls, age: 41...
September 2016: Journal of Diabetes and its Complications
Hendra Susanto, Ta-Yu Liu, Chang-Chiang Chen, Jerry D T Purnomo, Shu-Fan Chen, Chih-Hong Wang
Long-standing diabetes or glucose intolerance is recognized as a crucial event in the process of pancreatic cancer. Betatrophin, a novel liver-derived hormone, promotes β-cell proliferation and improves glucose intolerance. However, the relationship between betatrophin and PDAC-associated diabetes is not fully understood. To evaluate the serum betatrophin levels in PDAC-associated diabetes, a total 105 Taiwanese subjects including 15 healthy subjects, and 12 patients having PDAC with normal glucose tolerance (PDAC-NGT), 12 patients having PC with impaired glucose tolerance (PDAC-IGT), and 66 patients having PC with diabetes mellitus (PDAC-DM) were enrolled for this study...
June 3, 2016: Oncotarget
Gulcin Sahin Ersoy, Tugba Altun Ensari, Seda Subas, Burak Giray, Engin Ersin Simsek, Ozge Cevik
OBJECTIVE: To investigate Wnt1-inducible signaling pathway protein-1 (WISP1) levels and their correlation with metabolic parameters in pregnant women with gestational diabetes mellitus (GDM) and non-GDM healthy pregnant women. MATERIALS AND METHODS: In this prospective cross-sectional study, the study group was composed of 62 women with GDM and 73 healthy pregnant women matched for age, body mass index (BMI) and gestational age. Blood samples were collected at 25-29th gestational week...
June 8, 2016: Journal of Maternal-fetal & Neonatal Medicine
Song Yue, Jingyang Wu, Jiahua Zhang, Lei Liu, Lei Chen
BACKGROUND: In order to clarify previous ambiguous research conclusions, a meta-analysis was made to investigate the relationship between betatrophin levels in blood and type 2 diabetes mellitus (T2DM). METHODS: We have searched all the English and Chinese references regarding the relationship between betatrophin and diabetes in database both manually and online. Strict criteria have been established to include and exclude articles, with Mean and Standard Deviation as statistics to evaluate strength of association...
2016: Disease Markers
Thibault J Harmand, Claudia E Murar, Jeffrey W Bode
Total chemical synthesis of proteins allows researchers to custom design proteins without the complex molecular biology that is required to insert non-natural amino acids or the biocontamination that arises from methods relying on overexpression in cells. We describe a detailed procedure for the chemical synthesis of proteins with the α-ketoacid-hydroxylamine (KAHA ligation), using (S)-5-oxaproline (Opr) as a key building block. This protocol comprises two main parts: (i) the synthesis of peptide fragments by standard fluorenylmethoxycarbonyl (Fmoc) chemistry and (ii) the KAHA ligation between fragments containing Opr and a C-terminal peptide α-ketoacid...
June 2016: Nature Protocols
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