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Leptin resistance

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https://www.readbyqxmd.com/read/28811200/globular-adiponectin-reverses-osteo-sarcopenia-and-altered-body-composition-in-ovariectomized-rats
#1
Shyamsundar Pal China, Subhashis Pal, Sourav Chattopadhyay, Konica Porwal, Sapana Kushwaha, Sharmishtha Bhattacharyya, Monika Mittal, Anagha A Gurjar, Tarun Barbhuyan, Abhishek K Singh, Arun K Trivedi, Jiaur R Gayen, Sabyasachi Sanyal, Naibedya Chattopadhyay
Adiponectin regulates various metabolic processes including glucose flux, lipid breakdown and insulin response. We recently reported that adiponectin receptor1 (adipoR1) activation by a small molecule reverses osteopenia in leptin receptor deficient db/db (diabetic) mice. However, the role of adiponectin in bone metabolism under the setting of post-menopausal (estrogen-deficiency) osteopenia and associated metabolic derangements has not been studied. Here, we studied the therapeutic effect of the globular form of adiponectin (gAd), which is predominantly an adipoR1 agonist, in aged ovariectomized (OVX) rats and compared it with standard-of-care anti-osteoporosis drugs...
August 12, 2017: Bone
https://www.readbyqxmd.com/read/28809927/in-middle-aged-and-old-obese-patients-training-intervention-reduces-leptin-level-a-meta-analysis
#2
Ildikó Rostás, László Pótó, Péter Mátrai, Péter Hegyi, Judit Tenk, András Garami, Anita Illés, Margit Solymár, Erika Pétervári, Ákos Szűcs, Andrea Párniczky, Dániel Pécsi, Zoltán Rumbus, Csaba Zsiborás, Nóra Füredi, Márta Balaskó
BACKGROUND: Leptin is one of the major adipokines in obesity that indicates the severity of fat accumulation. It is also an important etiological factor of consequent cardiometabolic and autoimmune disorders. Aging has been demonstrated to aggravate obesity and to induce leptin resistance and hyperleptinemia. Hyperleptinemia, on the other hand, may promote the development of age-related abnormalities. While major weight loss has been demonstrated to ameliorate hyperleptinemia, obese people show a poor tendency to achieve lasting success in this field...
2017: PloS One
https://www.readbyqxmd.com/read/28806419/effects-of-short-term-dry-immersion-on-bone-remodeling-markers-insulin-and-adipokines
#3
Marie-Thérèse Linossier, Liubov E Amirova, Mireille Thomas, Myriam Normand, Marie-Pierre Bareille, Guillemette Gauquelin-Koch, Arnaud Beck, Marie-Claude Costes-Salon, Christine Bonneau, Claude Gharib, Marc-Antoine Custaud, Laurence Vico
BACKGROUND: Dry immersion (DI), a ground-based model of microgravity previously used in Russia, has been recently implemented in France. The aim of this study was to analyze early events in a short-term DI model in which all conditions are met to investigate who is first challenged from osteo- or adipo-kines and to what extent they are associated to insulin-regulating hormones. METHODS: Twelve healthy men were submitted to a 3-day DI. Fasting blood was collected during pre-immersion phase for the determination of the baseline data collection (BDC), daily during DI (DI24h, DI48H and DI72h), then after recovery (R+3h and R+24h)...
2017: PloS One
https://www.readbyqxmd.com/read/28804449/loss-of-leptin-induced-modulation-of-hippocampal-synaptic-trasmission-and-signal-transduction-in-high-fat-diet-fed-mice
#4
Marco Mainardi, Matteo Spinelli, Federico Scala, Andrea Mattera, Salvatore Fusco, Marcello D'Ascenzo, Claudio Grassi
Hippocampal plasticity is triggered by a variety of stimuli including sensory inputs, neurotrophins and inflammation. Leptin, whose primary function is to regulate food intake and energy expenditure, has been recently shown to affect hippocampal neurogenesis and plasticity. Interestingly, mice fed a high-fat diet (HFD) exhibit impaired hippocampal function, but the underlying mechanisms are poorly understood. To address this issue, we compared leptin responsiveness of hippocampal neurons in control and HFD-fed mice by combining single-cell electrophysiology and biochemical assays...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28801090/leptin-concentrations-and-scd-1-indices-in-classical-homocystinuria-evidence-for-the-role-of-sulfur-amino-acids-in-the-regulation-of-lipid-metabolism
#5
Soraia Poloni, Poli Mara Spritzer, Roberta H Mendes, Vânia D'almeida, Kamila Castro, Fernanda Sperb-Ludwig, Johanna Kugele, Sara Tucci, Henk J Blom, Ida V D Schwartz
BACKGROUND: We describe body composition, lipid metabolism and Stearoyl-CoA desaturase-1 (SCD-1) indices in patients with classical homocystinuria (HCU). METHODS: Eleven treated HCU patients and 16 healthy controls were included. Body composition and bone mineral density were assessed by dual X-ray absorptiometry. Sulfur-containing amino acids (SAA) and their derivatives (total homocysteine, cysteine, methionine, S-adenosylmethionine, S-adenosylhomocysteine, and glutathione), lipids (free fatty acids, acylcarnitines, triglycerides and lipoproteins), glucose, insulin, leptin, adiponectin, and isoprostanes were measured in plasma...
August 8, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28794431/macrophage-jak2-deficiency-protects-against-high-fat-diet-induced-inflammation
#6
Harsh R Desai, Tharini Sivasubramaniyam, Xavier S Revelo, Stephanie A Schroer, Cynthia T Luk, Prashanth R Rikkala, Adam H Metherel, David W Dodington, Yoo Jin Park, Min Jeong Kim, Joshua A Rapps, Rickvinder Besla, Clinton S Robbins, Kay-Uwe Wagner, Richard P Bazinet, Daniel A Winer, Minna Woo
During obesity, macrophages can infiltrate metabolic tissues, and contribute to chronic low-grade inflammation, and mediate insulin resistance and diabetes. Recent studies have elucidated the metabolic role of JAK2, a key mediator downstream of various cytokines and growth factors. Our study addresses the essential role of macrophage JAK2 in the pathogenesis to obesity-associated inflammation and insulin resistance. During high-fat diet (HFD) feeding, macrophage-specific JAK2 knockout (M-JAK2(-/-)) mice gained less body weight compared to wildtype littermate control (M-JAK2(+/+)) mice and were protected from HFD-induced systemic insulin resistance...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28774733/current-child-but-not-maternal-snoring-is-bi-directionally-related-to-adiposity-and-cardiometabolic-risk-markers-a-cross-sectional-and-a-prospective-cohort-analysis
#7
Olivia M Farr, Sheryl L Rifas-Shiman, Emily Oken, Elsie M Taveras, Christos S Mantzoros
PURPOSE: Obstructive sleep apnea (OSA), typically manifested as snoring, is closely associated with obesity. However, the directionality of associations of OSA with cardiometabolic risk markers is unclear, as obesity increases risk for OSA, and OSA results in excess weight gain and its metabolic consequences. Less is known about how obesity and OSA may relate in children and adolescents and whether maternal OSA may influence the development of obesity and cardiometabolic dysfunction in offspring...
June 29, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28771179/leptin-receptor-gene-variant-rs11804091-is-associated-with-bmi-and-insulin-resistance-in-spanish-female-obese-children-a-case-control-study
#8
Josune Olza, Azahara I Rupérez, Mercedes Gil-Campos, Rosaura Leis, Ramón Cañete, Rafael Tojo, Ángel Gil, Concepción M Aguilera
Leptin is an endocrine hormone that has a critical role in body weight homoeostasis and mediates its effects via the leptin receptor (LEPR). Common polymorphisms in the genes coding leptin receptors have been associated with metabolic abnormalities. We assessed the association of 28 LEPR polymorphisms with body mass index (BMI) and their relationship with obesity-related phenotypes, inflammation and cardiovascular disease risk biomarkers. A multicentre case-control study was conducted in 522 children (286 with obesity and 236 with normal-BMI)...
August 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28768997/loss-of-stearoyl-coa-desaturase-1-activity-induced-leptin-resistance-in-neuronal-cells
#9
Mina Thon, Toru Hosoi, Chanbora Chea, Koichiro Ozawa
The lack of response to leptin's actions in the brain, "leptin resistance," is one of the main causes of the pathogenesis of obesity. However, although high-fat diets affect sensitivity to leptin, the underlying mechanisms of leptin resistance are still an enigma. Here we examined the effect of excess saturated fatty acids (SFAs) on leptin signaling in human neuronal cells. Palmitate, the principle source of SFAs in diet, induced leptin resistance in a human neuroblastoma cell line stably transfected with the Ob-Rb leptin receptor (SH-SY5Y-ObRb)...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28759403/metformin-for-obesity-in-prepubertal-and-pubertal-children-a-randomized-controlled-trial
#10
Belén Pastor-Villaescusa, M Dolores Cañete, Javier Caballero-Villarraso, Raúl Hoyos, Miriam Latorre, Rocío Vázquez-Cobela, Julio Plaza-Díaz, José Maldonado, Gloria Bueno, Rosaura Leis, Ángel Gil, Ramón Cañete, Concepción M Aguilera
OBJECTIVES: Metformin has shown its effectiveness in treating obesity in adults. However, little research has been conducted in children, with a lack of attention on pubertal status. The objectives were to determine whether oral metformin treatment reduces BMI z score, cardiovascular risk, and inflammation biomarkers in children who are obese depending on pubertal stage and sex. METHODS: This was a randomized, prospective, double-blind, placebo-controlled, multicenter trial, stratified according to pubertal stage and sex, conducted at 4 Spanish clinical hospitals...
July 2017: Pediatrics
https://www.readbyqxmd.com/read/28759152/anthocyanins-from-purple-corn-ameliorated-tnf-%C3%AE-induced-inflammation-and-insulin-resistance-in-3t3-l1-adipocytes-via-activation-of-insulin-signaling-and-enhanced-glut4-translocation
#11
Diego Luna-Vital, Matthew Weiss, Elvira Gonzalez de Mejia
SCOPE: The aim was to compare the effect of an anthocyanin-rich extract from purple corn pericarp (PCW) and pure anthocyanins on adipogenesis, inflammation and insulin resistance in 3T3-L1 adipocytes on basal and inflammatory conditions. METHODS AND RESULTS: Preadipocytes (3T3-L1) were treated during differentiation with or without PCW. Differentiated adipocytes were treated either individually or in combination with tumor necrosis factor TNF-α and PCW, or pure C3G, Pg3G, P3G...
July 31, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28758947/adiponectin-leptin-and-leptin-receptor-in-obese-patients-with-type-2-diabetes-treated-with-insulin-detemir
#12
Paweł Olczyk, Robert Koprowski, Katarzyna Komosinska-Vassev, Agnieszka Jura-Półtorak, Katarzyna Winsz-Szczotka, Kornelia Kuźnik-Trocha, Łukasz Mencner, Alicja Telega, Diana Ivanova, Krystyna Olczyk
The aim of the present study is to quantitatively assess the expression of selected regulatory molecules, such as leptin, leptin receptor, and adiponectin in the blood of obese patients with type 2 diabetes both before treatment and after six months of pharmacological therapy with the long-lasting insulin analogue, insulin detemir. A significant decrease in the analysed regulatory molecules, i.e., leptin receptor and adiponectin, was found in blood plasma of the patients with untreated type 2 diabetes. These changes were accompanied by an increase in plasma leptin concentrations...
July 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28757776/leptin-is-an-independent-marker-of-metabolic-syndrome-in-elderly-adults-with-type-2-diabetes
#13
Pei-Wei Tseng, Du-An Wu, Jia-Sian Hou, Bang-Gee Hsu
OBJECTIVE: It is well established that patients with metabolic syndrome (MetS) demonstrate elevated levels of serum leptin. The aim of this study is to identify fasting serum leptin as an independent marker of MetS in geriatric diabetic patients. MATERIALS AND METHODS: Sixty-four patients over 65 years old with type 2 diabetic mellitus (T2DM) were assessed for MetS based on the diagnostic criteria of the International Diabetes Federation. Fasting blood samples including serum leptin concentrations were obtained from the participants...
April 2017: Ci Ji Yi Xue za Zhi, Tzu-chi Medical Journal
https://www.readbyqxmd.com/read/28754390/bariatric-surgery-induced-lower-angiopoietin-like-2-protein-is-associated-with-improved-cardiometabolic-profile
#14
Marie-Eve Piché, Nathalie Thorin-Trescases, Audrey Auclair, Simon Marceau, Julie Martin, Annik Fortier, Eric Thorin, Paul Poirier
BACKGROUND: Plasma angiopoietin-like 2 (Angptl2), a proinflammatory protein, has been associated with obesity and diabetes. Whether weight loss induced by bariatric surgery and associated improvement of the cardiometabolic risk profile influence circulating Angptl2 levels is unknown. We tested whether biliopancreatic diversion with duodenal switch (BPD-DS) surgery alters plasma Angptl2 concentrations. METHODS: Severely obese patients (n = 73; body mass index: 49...
August 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28751956/saponins-as-adipokines-modulator-a-possible-therapeutic-intervention-for-type-2-diabetes
#15
REVIEW
Olusola Olalekan Elekofehinti, Oluwamodupe Cecilia Ejelonu, Jean Paul Kamdem, Oluwaseun Benedicta Akinlosotu, Isaac Gbadura Adanlawo
Development of type 2 diabetes has been linked to β-cell failure coupled with insulin resistance and obesity. Adipose tissue, known as the fat store, secretes a number of hormones and proteins collectively termed adipokines some of which regulate insulin sensitivity. Dysregulation in the secretion of adipokines has been linked to insulin resistance and type 2 diabetes. In this review, we summarized evidence of the role of adipokines with focus on leptin, adiponectin, adipsin, visfatin and apelin in the pathogenesis of type 2 diabetes and discussed the potential of saponins to modify the ill-regulated adipokines secretions, which could promote the use of this class of phytochemicals as potential antidiabetics agents...
July 15, 2017: World Journal of Diabetes
https://www.readbyqxmd.com/read/28750045/effect-of-maternal-obesity-on-birthweight-and-neonatal-fat-mass-a-prospective-clinical-trial
#16
Delphine Mitanchez, Sophie Jacqueminet, Jacky Nizard, Marie-Laure Tanguy, Cécile Ciangura, Jean-Marc Lacorte, Céline De Carne, Laurence Foix L'Hélias, Pascale Chavatte-Palmer, Marie-Aline Charles, Marc Dommergues
OBJECTIVE: To discriminate the effect of maternal obesity and gestational diabetes on birth weight and adipose tissue of the newborn. METHODS: Normal BMI women (group N, n = 243; 18.5≤ BMI<25 kg/m2) and obese women (group Ob, n = 253; BMI≥30 kg/m2) were recruited in a prospective study between 15 and 18 weeks of gestation. All women were submitted to a 75g oral glucose tolerance test in the second and third trimester. First trimester fasting blood glucose was also obtained from Ob women...
2017: PloS One
https://www.readbyqxmd.com/read/28749790/do-we-need-to-screen-for-de-novo-diabetes-mellitus-in-chronic-hepatitis-c-patients-after-a-sustained-virological-response
#17
Nasser Mousa, Ahmed Abdel-Razik, Raghda Farag, Walaa Shabana, Ayman Elgamal, Niveen El-Wakeel, Rasha Elzehery, Wagdi Elkashef, Waleed Eldars
BACKGROUND AND AIM: There are millions of chronic hepatitis C (CHC) virus-infected patients who have been treated with a combination therapy (interferon and ribavirin) and have achieved a virological response (SVR) worldwide. The aim of this study is to evaluate the risk factors for de-novo diabetes mellitus in CHC patients treated with combination therapy (interferon and ribavirin) and have achieved an SVR. PATIENTS AND METHODS: A total of 214 nondiabetic CHC patients with SVR and baseline homeostasis model assessment (HOMA) less than or equal to 2 were divided into group A, which included 108 patients with a BMI less than 25, and group B, which included 106 patients with a BMI of at least 25 and less than 30...
September 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28749784/concentrations-of-leptin-adiponectin-and-other-metabolic-parameters-in-non-obese-children-with-down-syndrome
#18
Nikhil Tenneti, Devi Dayal, Sheetal Sharda, Inusha Panigrahi, Mohammed Didi, Savita Verma Attri, Naresh Sachdeva, Anil Kumar Bhalla
BACKGROUND: Recent data indicates that adults with Down syndrome (DS) are at increased risk for cardiovascular disease (CVD) that significantly contributes to their morbidity and mortality. Although identification of cardiometabolic risk factors during childhood is desirable to design preventive interventions, the data on such risk factors in children with DS is scarce. The aim of this study was to study the cardiometabolic risk factors such as insulin resistance (IR), leptin and adiponectin concentrations, lipid abnormalities and leptin resistance in non-obese children with DS...
August 28, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28744221/sexual-dimorphism-in-the-age-induced-insulin-resistance-liver-steatosis-and-adipose-tissue-function-in-rats
#19
Francisco Garcia-Carrizo, Teresa Priego, Nara Szostaczuk, Andreu Palou, Catalina Picó
Age-linked metabolic disturbances, such as liver steatosis and insulin resistance, show greater prevalence in men than in women. Thus, our aim was to analyze these sex-related differences in male and female Wistar rats (aged 26 days and 3, 7, and 14 months), and to assess their potential relationship with alterations in the capacity of adipose tissue expansion and the dysregulation of the main adipokines produced by the adipose tissue, leptin and adiponectin. Adiposity-related parameters, blood parameters, the expression of genes related to expandability and inflammation (WAT), lipid metabolism (liver), and leptin and insulin signaling (both tissues) were measured...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28743192/searching-for-evidence-of-an-anti-inflammatory-diet-in-children-a-systematic-review-of-randomized-controlled-trials-for-pediatric-obesity-interventions-with-a-focus-on-leptin-ghrelin-and-adiponectin
#20
Kimberly A Lewis, Sharon A Brown
PROBLEM: To address the complex phenomenon of pediatric obesity, one must understand the physiological mechanisms regulating energy intake and inflammation. The peptide hormones leptin, ghrelin, and adiponectin are involved in both, but their functions are dysregulated in obesity. The purpose of this systematic review is (1) to characterize studies of nutrition interventions for weight management in children who measure these peptides as outcomes, (2) to assess risk of bias in the studies, and (3) to determine the relationships between these peptides and body mass index (BMI)...
January 1, 2017: Biological Research for Nursing
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