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Leptin, obesity

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https://www.readbyqxmd.com/read/29332012/classical-adiponectin-leptin-resistin-and-new-chemerin-vaspin-omentin-adipocytokines-in-patients-with-prediabetes
#1
Antoaneta Gateva, Yavor Assyov, Adelina Tsakova, Zdravko Kamenov
Background In the last decade, there has been an increased interest toward fat tissue as an endocrine organ that secretes many cytokines and bioactive mediators that play a role in insulin sensitivity, inflammation, coagulation and the pathogenesis of atherosclerosis. The aim of this study was to investigate classical (adiponectin, leptin, resistin) and new (chemerin, vaspin, omentin) adipocytokine levels in subjects with prediabetes [impaired fasting glucose (IFG) and/or impaired glucose tolerance (IGT)] and obese subjects with normoglycemia...
January 15, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29331057/manifestations-and-mechanisms-of-myocardial-lipotoxicity-in-obesity
#2
Arthur C Sletten, Linda R Peterson, Jean E Schaffer
Environmental and socioeconomic changes over the past thirty years have contributed to a dramatic rise in the worldwide prevalence of obesity. Heart disease is among the most serious health risks of obesity, with increases in both atherosclerotic coronary heart disease and heart failure among obese individuals. In this review, we focus on primary myocardial alterations in obesity that include hypertrophic remodeling and diastolic dysfunction. Obesity-associated perturbations in myocardial and systemic lipid metabolism are important contributors to cardiovascular complications of obesity...
January 13, 2018: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29330929/adipocytes-affect-castration-resistant-prostate-cancer-cells-to-develop-the-resistance-to-cytotoxic-action-of-nk-cells-with-alterations-of-pd-l1-nkg2d-ligand-levels-in-tumor-cells
#3
Lijun Xu, Mingjing Shen, Xiaodong Chen, Rongying Zhu, Dong-Rong Yang, Ying Tsai, Peter C Keng, Yuhchyau Chen, Soo Ok Lee
BACKGROUND: Obesity affects prostate cancer (PCa) progression, and the periprostatic adipose tissue adjacent to the prostate is considered a driving force of disease progression. Adipocytes are the main cell population in adipose tissues and their paracrine role contributes to PCa progression, however its implication in modulating immune reactions remains largely unknown. We investigated the adipocyte role in controlling the susceptibility of castration-resistant PCa (CRPC) cells to the cytotoxic action of natural killer (NK) cells...
January 12, 2018: Prostate
https://www.readbyqxmd.com/read/29330372/non-estrogenic-xanthohumol-derivatives-mitigate-insulin-resistance-and-cognitive-impairment-in-high-fat-diet-induced-obese-mice
#4
Cristobal L Miranda, Lance A Johnson, Oriane de Montgolfier, Valerie D Elias, Lea S Ullrich, Joshua J Hay, Ines L Paraiso, Jaewoo Choi, Ralph L Reed, Johana S Revel, Chrissa Kioussi, Gerd Bobe, Urszula T Iwaniec, Russell T Turner, Benita S Katzenellenbogen, John A Katzenellenbogen, Paul R Blakemore, Adrian F Gombart, Claudia S Maier, Jacob Raber, Jan F Stevens
Xanthohumol (XN), a prenylated flavonoid from hops, improves dysfunctional glucose and lipid metabolism in animal models of metabolic syndrome (MetS). However, its metabolic transformation into the estrogenic metabolite, 8-prenylnaringenin (8-PN), poses a potential health concern for its use in humans. To address this concern, we evaluated two hydrogenated derivatives, α,β-dihydro-XN (DXN) and tetrahydro-XN (TXN), which showed negligible affinity for estrogen receptors α and β, and which cannot be metabolically converted into 8-PN...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29329923/different-protein-composition-of-low-calorie-diet-differently-impacts-adipokine-profile-irrespective-of-weight-loss-in-overweight-and-obese-women
#5
R Mateo-Gallego, I Lamiquiz-Moneo, S Perez-Calahorra, V Marco-Benedí, A M Bea, L Baila-Rueda, M Laclaustra, J L Peñalvo, F Civeira, A Cenarro
BACKGROUND AND AIMS: High-protein (HP) diets have shown benefits in cardiometabolic markers such as insulin or triglycerides but the responsible mechanisms are not known. We aimed to assess the effect of three energy-restricted diets with different protein contents (20%, 27%, and 35%; ∼80% coming from animal source) on plasma adipokine concentration and its association with changes in cardiometabolic markers. METHODS: Seventy-six women (BMI 32.8 ± 2.93) were randomized to one of three calorie-reduced diets, with protein, 20%, 27%, or 35%; carbohydrates, 50%, 43%, or 35%; and fat, 30%, for 3 months...
November 4, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29329236/gender-associated-impact-of-early-leucine-supplementation-on-adult-predisposition-to-obesity-in-rats
#6
Nora López, Juana Sánchez, Andreu Palou, Francisca Serra
Early nutrition plays an important role in development and may constitute a relevant contributor to the onset of obesity in adulthood. The aim of this study was to evaluate the long-term impact of maternal leucine (Leu) supplementation during lactation on progeny in rats. A chow diet, supplemented with 2% Leu, was supplied during lactation (21 days) and, from weaning onwards, was replaced by a standard chow diet. Then, at adulthood (6 months of age), this was replaced with hypercaloric diets (either with high-fat (HF) or high-carbohydrate (HC) content), for two months, to induce obesity...
January 12, 2018: Nutrients
https://www.readbyqxmd.com/read/29327584/gama-aminobutyric-acid-enriched-rice-bran-diet-attenuates-insulin-resistance-and-balances-energy-expenditure-via-modification-of-gut-microbiota-and-scfas
#7
Xu Si, Wenting Shang, Zhongkai Zhou, Guanghou Shui, Sin Man Lam, Christopher L Blanchard, Padraig Strappe
In this study, gama-aminobutyric acid (GABA) enriched rice bran (ERB) was supplemented to obese rats to investigate the attenuation of metabolic syndromes induced by high-fat diet. ERB-containing diet stimulated butyrate and propionate production by promoting Anaerostipes, Anaerostipes sp. and associated synthesizing enzymes. This altered SCFA distribution further enhanced circulatory levels of leptin and glucagon-like peptide-1, controlling food intake by down-regulating orexigenic factors. Together with the enhanced fatty acid β-oxidation highlighted by Prkaa2, Ppara, Scd1 expression via AMPK signaling pathway and Non-alcoholic fatty liver disease pathway, energy expenditure was positively modulated...
January 12, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29325772/the-association-of-snp276g-t-at-adiponectin-gene-with-insulin-resistance-and-circulating-adiponectin-in-response-to-two-different-hypocaloric-diets
#8
Daniel Antonio de Luis, Olatz Izaola, David Primo, R Aller, A Ortola, E Gómez, J J Lopez
BACKGROUND: Several adiponectin gene (ADIPOQ) single nucleotide polymorphisms (SNPS) have been related with adiponectin levels and risk for obesity. OBJECTIVE: The aim of our study was to analyze the effect of rs1501299 ADIPOQ gene polymorphism and dietary intake on total adiponectin levels and insulin resistance after two hypocaloric diets in obese subjects. MATERIAL AND METHODS: A Caucasian population of 284 obese patients was enrolled in a randomized clinical trial with two hypocaloric diets (I: moderate carbohydrates vs II: low fat)...
January 8, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29324787/association-of-sex-hormones-with-physical-laboratory-and-imaging-markers-of-anthropometry-in-men-and-women-from-the-general-population
#9
Tom Seyfart, Nele Friedrich, Hanna Kische, Robin Bülow, Henri Wallaschofski, Henry Völzke, Matthias Nauck, Brian G Keevil, Robin Haring
OBJECTIVES: The aim of this study was to evaluate the association of sex hormones with anthropometry in a large population-based cohort, with liquid chromatography-mass spectrometry (LCMS)-based sex hormone measurements and imaging markers. STUDY DESIGN/MAIN OUTCOME MEASURES: Cross-sectional data from 957 men and women from the population-based Study of Health in Pomerania (SHIP) were used. Associations of a comprehensive panel of LCMS-measured sex hormones with anthropometric parameters, laboratory, and imaging markers were analyzed in multivariable regression models for the full sample and stratified by sex...
2018: PloS One
https://www.readbyqxmd.com/read/29324697/association-between-fetal-adipokines-and-child-behavioral-problems-at-preschool-age-the-hokkaido-study-on-environment-and-children-s-health
#10
Machiko Minatoya, Sachiko Itoh, Atsuko Araki, Naomi Tamura, Keiko Yamazaki, Chihiro Miyashita, Reiko Kishi
Studies have suggested associations between maternal obesity and mental health problems of their children. However, the underlying mechanism is largely unknown. A possible mechanism can be via inflammatory states and the other possible mechanism is metabolic hormone-induced programming. Cross-talk between adipokines, including inflammatory cytokines and metabolic hormones secreted from adipose tissue and the central nervous system needs to be further investigated to elucidate the mechanism. Thus, the aim of this study was to investigate the association between fetal adipokine levels and child behavioral problems at preschool age...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29323138/whole-mount-adult-ear-skin-imaging-reveals-defective-neuro-vascular-branching-morphogenesis-in-obese-and-type-2-diabetic-mouse-models
#11
Tomoko Yamazaki, Wenling Li, Ling Yang, Ping Li, Haiming Cao, Sei-Ichiro Motegi, Mark C Udey, Elise Bernhard, Takahisa Nakamura, Yoh-Suke Mukouyama
Obesity and type 2 diabetes are frequently associated with peripheral neuropathy. Though there are multiple methods for diagnosis and analysis of morphological changes of peripheral nerves and blood vessels, three-dimensional high-resolution imaging is necessary to appreciate the pathogenesis with an anatomically recognizable branching morphogenesis and patterning. Here we established a novel technique for whole-mount imaging of adult mouse ear skin to visualize branching morphogenesis and patterning of peripheral nerves and blood vessels...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322840/biochemical-characterisation-of-a-kunitz-type-inhibitor-from-tamarindus-indica-l-seeds-and-its-efficacy-in-reducing-plasma-leptin-in-an-experimental-model-of-obesity
#12
Amanda Fernandes de Medeiros, Izael de Sousa Costa, Fabiana Maria Coimbra de Carvalho, Sumika Kiyota, Beatriz Blenda Pinheiro de Souza, Daniel Nogoceke Sifuentes, Raphael Paschoal Serquiz, Bruna Leal Lima Maciel, Adriana Ferreira Uchôa, Elizeu Antunes Dos Santos, Ana Heloneida de Araújo Morais
A trypsin inhibitor isolated from tamarind seed (TTI) has satietogenic effects in animals, increasing the cholecystokinin (CCK) in eutrophy and reducing leptin in obesity. We purified TTI (pTTI), characterised, and observed its effect upon CCK and leptin in obese Wistar rats. By HPLC, and after amplification of resolution, two protein fractions were observed: Fr1 and Fr2, with average mass of [M + 14H]+ = 19,594,690 Da and [M + 13H]+ = 19,578,266 Da, respectively. The protein fractions showed 54 and 53 amino acid residues with the same sequence...
December 2018: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/29321684/leptin-and-the-maintenance-of-elevated-body-weight
#13
REVIEW
Warren W Pan, Martin G Myers
Obesity represents the single most important risk factor for early disability and death in developed societies, and the incidence of obesity remains at staggering levels. CNS systems that modulate energy intake and expenditure in response to changes in body energy stores serve to maintain constant body adiposity; the adipocyte-derived hormone leptin and its receptor (LEPR) represent crucial regulators of these systems. As in the case of insulin resistance, a variety of mechanisms (including feedback inhibition, inflammation, gliosis and endoplasmic reticulum stress) have been proposed to interfere with leptin action and impede the systems that control body energy homeostasis to promote or maintain obesity, although the relative importance and contribution of each of these remain unclear...
January 11, 2018: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/29321614/effects-on-metabolic-parameters-in-young-rats-born-with-low-birth-weight-after-exposure-to-a-mixture-of-pesticides
#14
Terje Svingen, Louise Ramhøj, Karen Mandrup, Sofie Christiansen, Marta Axelstad, Anne Marie Vinggaard, Ulla Hass
Pesticide exposure during fetal life can lead to low birth weight and is commonly observed in reproductive toxicology studies. Associations have also been found in low birth weight babies born from pesticide-exposed gardeners. Since low birth weight is also linked to metabolic disorders, it can be speculated that early life exposure to pesticides could increase the risk of becoming obese or developing diabetes later in life. We have analyzed potential long-term effects of gestational and lactational exposure to a low dose mixture of six pesticides that individually can cause low birth weight: Cyromazine, MCPB, Pirimicarb, Quinoclamine, Thiram, and Ziram...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320782/thyroid-hormone-status-in-overweight-children-with-attention-deficit-hyperactivity-disorder
#15
Christian Langrock, Johannes Hebebrand, Katharina Radowksi, Eckard Hamelmann, Thomas Lücke, Martin Holtmann, Tanja Legenbauer, Börge Schmidt, Mirjam Frank, Karl-Heinz Jöckel, Thomas Reinehr
BACKGROUND: There is an ongoing discussion whether thyroid hormones are involved in the development and course of attention deficit/hyperactivity disorder (ADHD). Since obesity is associated with both higher thyroid-stimulating hormone (TSH) and free triiodothyronine (fT3) concentrations and increased rates of ADHD, we hypothesized that overweight children with ADHD show higher TSH and fT3 concentrations compared to overweight children without ADHD. METHODS: TSH, fT3, fT4, and leptin levels were analyzed in 230 children (60...
January 10, 2018: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29318945/relationship-between-obesity-and-iron-deficiency-anemia-is-there-a-role-of-hepcidin
#16
Ertan Sal, Idil Yenicesu, Nurullah Celik, Hatice Pasaoglu, Bulent Celik, Ozge Tugce Pasaoglu, Zühre Kaya, Ulker Kocak, Orhun Camurdan, Aysun Bideci, Peyami Cinaz
OBJECTIVES: Iron deficiency is common in obese children although the underlying mechanism is unclear. The aim of this study was to investigate the associations between iron parameters, leptin, hepcidin and adiponectin levels in obese children. METHODS: A total of 237 children, ranging in age from 5 to 18 years, 180 with primary obesity and 57 healthy children and adolescents, were enrolled. Complete blood count, serum iron levels, iron-binding capacity, ferritin levels, leptin, hepcidin and adiponectin levels were studied...
January 10, 2018: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/29316799/leptin-adiponectin-ratio-in-overweight-patients-gender-differences
#17
Selthofer-Relatić K, Radić R, Stupin A, Šišljagić V, Bošnjak I, Bulj N, Selthofer R, Delić Brkljačić D
OBJECTIVE: Obesity-related atherosclerosis is a systemic disease with a background connected to multiple metabolic-neurohumoral pathways. The leptin/adiponectin ratio has been suggested as an atherosclerotic marker in obese patients. The aim of this study was to assess (1) the significance of the L/A ratio in overweight subjects, (2) the relation with anthropometric/metabolic parameters and (3) gender difference. METHOD: The study included 80 adult males and females, overweight, non-diabetic patients...
January 1, 2018: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/29314270/association-of-leptin-with-disease-severity-and-inflammation-indicators-in-chinese-obese-children-with-allergic-rhinitis
#18
Wenlong Liu, Qingxiang Zeng, Lifeng Zhou, Renzhong Luo, Haipeng Dong
BACKGROUND: The prevalence of both obesity and allergic diseases in children has increased over the last several decades. However, the direct relationship between diverse allergic diseases and obesity has varied in different studies. Therefore, we aimed to examine the effect of obesity on the incidence and severity of allergic rhinitis (AR) and the possible key inflammation mediators during AR. METHODS: A total of 3,126 healthy students (without chronic diseases) were recruited from 14 randomly selected secondary schools in Guangzhou, China...
January 4, 2018: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/29312569/metformin-improves-nonalcoholic-fatty-liver-disease-in-obese-mice-via-down-regulation-of-apolipoprotein-a5-as-part-of-the-ampk-lxr%C3%AE-signaling-pathway
#19
Min-Jie Lin, Wen Dai, Melanie J Scott, Rong Li, Yi-Qi Zhang, Yang Yang, Lu-Zhu Chen, Xian-Sheng Huang
Apolipoprotein A5 (apoA5) has been implicated in the formation of hepatocyte lipid droplets, a histological hallmark of non-alcoholic fatty liver disease (NAFLD). Recent evidence demonstrated that liver X receptor α (LXRα), a transcription factor involved in down-regulation of APOA5 mRNA, is activated by AMP-activated protein kinase (AMPK) that contributes to metformin-related antihyperglycemic effects. In this study we investigated the role of apoA5 and AMPK/LXRα signaling pathway in metformin-related improvement of NAFLD...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29311637/loss-of-function-mutations-in-adcy3-cause-monogenic-severe-obesity
#20
Sadia Saeed, Amélie Bonnefond, Filippo Tamanini, Muhammad Usman Mirza, Jaida Manzoor, Qasim M Janjua, Sadia M Din, Julien Gaitan, Alexandra Milochau, Emmanuelle Durand, Emmanuel Vaillant, Attiya Haseeb, Franck De Graeve, Iandry Rabearivelo, Olivier Sand, Gurvan Queniat, Raphaël Boutry, Dina A Schott, Hina Ayesha, Muhammad Ali, Waqas I Khan, Taeed A Butt, Tuula Rinne, Connie Stumpel, Amar Abderrahmani, Jochen Lang, Muhammad Arslan, Philippe Froguel
Study of monogenic forms of obesity has demonstrated the pivotal role of the central leptin-melanocortin pathway in controlling energy balance, appetite and body weight 1 . The majority of loss-of-function mutations (mostly recessive or co-dominant) have been identified in genes that are directly involved in leptin-melanocortin signaling. These genes, however, only explain obesity in <5% of cases, predominantly from outbred populations 2 . We previously showed that, in a consanguineous population in Pakistan, recessive mutations in known obesity-related genes explain ~30% of cases with severe obesity3-5...
January 8, 2018: Nature Genetics
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