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https://www.readbyqxmd.com/read/29054053/leptin-reduces-microrna-122-level-in-hepatic-stellate-cells-in-vitro-and-in-vivo
#1
Xuguang Zhai, Fangyun Cheng, Li Ji, Xiaofei Zhu, Qing Cao, Yali Zhang, Xin Jia, Qian Zhou, Wei Guan, Yajun Zhou
Obese patients, often accompanied by hyperleptinemia, are more likely to develop liver fibrosis. Leptin, an adipocyte-derived hormone, augments inflammatory in liver and promotes hepatic stellate cell (HSC) activation (a key step for liver fibrogenesis) and liver fibrosis. microRNA-122 (miR-122) is the most abundant liver-specific miRNA and can attenuate liver fibrosis. This study examined the effect of leptin on miR-122 level in HSCs in vivo and in vitro. Results demonstrated that leptin reduced the levels of both miR-122 (mature miR-122) and primary miR-122 (pri-miR-122)...
October 17, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29053943/inflammation-status-of-healthy-young-men-initial-and-specific-responses-to-resistance-training
#2
Johanna K Ihalainen, Heikki Peltonen, Göran Paulsen, Juha P Ahtiainen, Ritva S Taipale, Mari Hämäläinen, Eeva Moilanen, Antti A Mero
PURPOSE: Our primary aim was to study the effects of a 4 wk preparatory resistance training (RT) period followed by 12 wks of two specific RT protocols (either hypertrophic-strength, HS, or strength-hypertrophy-power, SHP, training) on inflammation markers and the possible relationship of the changes in abdominal fat and lean mass to the changes in inflammation status. METHODS: A total of 82 healthy men were included in the study. Maximal concentric leg press strength (1RM), total body lean mass, total body and abdominal fat mass, circulating high-sensitivity C-reactive protein (hs-CRP), interleukin-6 (IL-6), interleukin-1 receptor antagonist (IL-1ra), monocyte chemoattractant protein 1 (MCP-1), and selected adipocytokines (resistin, adiponectin and leptin) concentrations were measured before (PRE) and after 4 (wk4) and 16 weeks (wk16) of RT...
October 20, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29051043/lysyl-oxidase-and-adipose-tissue-dysfunction
#3
Emilie Pastel, Emily Price, Kajsa Sjöholm, Laura J McCulloch, Nikolaj Rittig, Neil Liversedge, Bridget Knight, Niels Moller, Per-Arne Svensson, Katarina Kos
BACKGROUND/OBJECTIVES: Lysyl oxidase (LOX) is an enzyme crucial for collagen fibre crosslinking and thus for fibrosis development. Fibrosis is characterised by a surplus of collagen fibre accumulation and is amongst others also a feature of obesity-associated dysfunctional adipose tissue (AT) which has been linked with type 2 diabetes. We hypothesised that in type 2 diabetes and obesity LOX expression and activity will be increased as a consequence of worsening AT dysfunction. This study aimed to provide a comprehensive characterisation of LOX in human AT...
October 16, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29050902/housing-conditions-modulate-the-reinforcing-properties-of-cocaine-in-adolescent-mice-that-binge-on-fat
#4
M Carmen Blanco-Gandía, Sandra Montagud-Romero, María A Aguilar, José Miñarro, Marta Rodríguez-Arias
Binge eating is a specific form of overeating characterized by intermittent, excessive eating. To date, several studies have addressed the effects that bingeing on fat has on the rewarding effects of drugs of abuse, but they have found contradictory and highly variable results. Housing conditions could modulate these results, as most studies employ isolated animals to measure the exact amount of food that is ingested. The aim of this study was to evaluate the effects of housing conditions on the response of mice to cocaine, modulated by bingeing on a high-fat diet during adolescence...
October 16, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29050480/the-effect-of-leptin-and-resveratrol-on-jak-stat-pathways-and-sirt-1-gene-expression-in-the-renal-tissue-of-ischemia-reperfusion-induced-rats
#5
S Erkasap, N Erkasap, B Bradford, L Mamedova, O Uysal, M Ozkurt, R Ozyurt, O Kutlay, B Bayram
OBJECTIVE: Our study aimed to investigate the possible modifying effects of leptin and combined use of resveratrol on rat renal I/R injury and their relationship on signal pathways and apoptosis-related mechanisms. BACKGROUND: Renal ischemia-reperfusion (I/R) injury is an important cause of acute renal failure. METHODS: Male Sprague Dawley rats were divided into 5 groups: Control, I/R, I/R+leptin, I/R+resveratrol and I/R+leptin+resveratrol...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29049554/genetic-association-of-major-depression-with-atypical-features-and-obesity-related-immunometabolic-dysregulations
#6
Yuri Milaneschi, Femke Lamers, Wouter J Peyrot, Bernhard T Baune, Gerome Breen, Abbas Dehghan, Andreas J Forstner, Hans J Grabe, Georg Homuth, Carol Kan, Cathryn Lewis, Niamh Mullins, Matthias Nauck, Giorgio Pistis, Martin Preisig, Margarita Rivera, Marcella Rietschel, Fabian Streit, Jana Strohmaier, Alexander Teumer, Sandra Van der Auwera, Naomi R Wray, Dorret I Boomsma, Brenda W J H Penninx
Importance: The association between major depressive disorder (MDD) and obesity may stem from shared immunometabolic mechanisms particularly evident in MDD with atypical features, characterized by increased appetite and/or weight (A/W) during an active episode. Objective: To determine whether subgroups of patients with MDD stratified according to the A/W criterion had a different degree of genetic overlap with obesity-related traits (body mass index [BMI] and levels of C-reactive protein [CRP] and leptin)...
October 18, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/29049270/adipokine-profile-in-patients-with-type-2-diabetes-depends-on-degree-of-obesity
#7
Joanna Kocot, Piotr Dziemidok, Małgorzata Kiełczykowska, Anna Hordyjewska, Grzegorz Szcześniak, Irena Musik
BACKGROUND The fast pace of life, promoting fast food consumption and low physical activity, has resulted in obesity and/or diabetes as being serious social problems. The aim of the present study was to evaluate concentrations of selected adipokines (leptin, adiponectin, resistin, and visfatin) and to assess the leptin/adiponectin ratio in plasma of type 2 diabetes (T2D) patients in relation to degree of obesity. MATERIAL AND METHODS The study comprised 92 T2D subjects divided into 4 groups according to BMI value - I (normal body weight), II (overweight), III (obesity), and IV (severe obesity) - and 20 healthy volunteers (control group)...
October 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29048637/leptin-induces-ros-via-nox5-in-healthy-and-neoplastic-mammary-epithelial-cells
#8
Sinda Mahbouli, Audrey Der Vartanian, Sophie Ortega, Stéphanie Rougé, Marie-Paule Vasson, Adrien Rossary
NADPH oxidase (NOX) complexes (a family of seven isoforms) drive cellular ROS production in patho-logical processes such as cancer. NOX-driven ROS production is involved in cell mechanisms from signalling to oxidative stress. Leptin, an adipokine overexpressed in obese patients, has been investigated in studies on breast carcinogenesis, but its effects on oxidative stress remain largely unexplored, especially in breast cancer. The study used three human mammary epithelial cell models presenting different neoplastic status (healthy primary HMECs, neoplastic MCF-7 cells and neoplastic MDA-MB-231 cells) to determine the effects of leptin on short-term ROS production and to characterize the enzymes involved...
September 27, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29048406/disparity-in-fetal-growth-between-twin-and-singleton-gestation-the-role-of-adipokines
#9
R Zemet, Y Shulman, R Hemi, B Brandt, E Sivan, H Kanety, S Mazaki-Tovi
OBJECTIVE: Twin pregnancies are characterized by unique pattern of attenuated fetal weight gain during late gestation compared with singleton gestation. The mechanism(s) responsible for regulating twin growth has not yet elucidated. Leptin and adiponectin are two adipocytokines implicated in metabolism and energy balance of fetuses, newborns and adults. Moreover, these hormones have been suggested to play a role in fetal growth. The objective of the study was to determine cord blood adiponectin and leptin in twins and singletons, with and without growth impairment...
October 19, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29047216/uteroplacental-insufficiency-in-rats-induces-renal-apoptosis-and-delays-nephrogenesis-completion
#10
James Sm Cuffe, Jessica F Briffa, Shannyn Rosser, Andrew L Siebel, Tania Romano, Deanne H Hryciw, Mary E Wlodek, Karen M Moritz
AIM: Uteroplacental insufficiency in rats reduces nephron endowment, leptin concentrations and programs cardiorenal disease in offspring. Cross-fostering growth restricted (Restricted) offspring onto a mother with normal lactation restores leptin concentrations and nephron endowment. This study aimed to determine if the reduced nephron endowment in Restricted offspring is due to delayed glomerular formation and dysregulation of renal genes regulating branching morphogenesis, apoptosis or leptin signalling...
October 19, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29045048/relationship-of-circulating-spexin-with-markers-of-cardiovascular-disease-a-pilot-study-in-adolescents-with-obesity
#11
S Kumar, M J Hossain, A Javed, I J Kullo, P B Balagopal
PURPOSE: Spexin, a novel peptide, has potential implications in obesity, satiety and energy homeostasis. The current study examined the relationship of spexin with various biomarkers of cardiovascular disease and endothelial function in adolescents with obesity. METHODS: Nineteen adolescents with obesity (age, 15.8 ± 1.7 years) were studied. Spexin, leptin and various cardiovascular disease biomarkers were measured. Endothelial function was assessed by high-resolution Doppler ultrasonography of the right brachial artery...
October 18, 2017: Pediatric Obesity
https://www.readbyqxmd.com/read/29044854/targeted-proteomic-analysis-of-habitual-coffee-consumption
#12
Marilyn C Cornelis, Stefan Gustafsson, Johan Ärnlöv, Sölve Elmståhl, Stefan Söderberg, Johan Sundström, Karl Michaëlsson, Lars Lind, Erik Ingelsson
BACKGROUND: Coffee drinking has been implicated in mortality and a variety of diseases but potential mechanisms underlying these associations are unclear. Large-scale systems epidemiological approaches may offer novel insights to mechanisms underlying associations of coffee with health. OBJECTIVE: We performed an analysis of known and novel protein markers linked to cardiovascular disease and their association with habitual coffee intake in the Prospective Study of the Vasculature in Uppsala Seniors (PIVUS, n=816) and followed-up top proteins in the Uppsala Longitudinal Study of Adult Men (ULSAM, n=635) and EpiHealth (n=2418)...
October 16, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29044801/differential-physiological-responses-to-central-leptin-overexpression-in-male-and-female-rats
#13
Isabelle Côté, Sara M Green, Hale Z Toklu, Drake Morgan, Christy S Carter, Nihal Tümer, Philip J Scarpace
Brains of females are more sensitive to the acute catabolic actions of leptin. However, sex differences in the long-term physiological responses to central leptin receptor modulation are unknown. To this end, we centrally delivered a viral vector to overexpress leptin (Leptin), a neutral leptin receptor antagonist (Leptin-Antagonist), or a green fluorescence protein (Control). We examined chronic changes in body weight and composition in male and female rats. Females displayed greater and sustained responses to Leptin whereas males rapidly lost physiological effects and developed leptin resistance confirmed by lower acute leptin-mediated phosphorylation of STAT3 (P-STAT3)...
October 17, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29044587/weight-suppression-and-bulimic-syndrome-maintenance-preliminary-findings-for-the-mediating-role-of-leptin
#14
Pamela K Keel, Lindsay P Bodell, Alissa A Haedt-Matt, Diana L Williams, Jonathan Appelbaum
OBJECTIVE: Longitudinal studies support a prospective relationship between weight suppression (WS) and bulimic syndrome (BN-S) maintenance. Although biobehavioral mechanisms have been proposed to explain this link, such mechanisms have yet to be identified. Given that weight loss would reduce leptin levels which may influence eating, this study examined whether reduced leptin levels mediate the link between greater WS and longer illness duration. METHOD: Women (N = 53), ages 18-45 years, were recruited from the community if they met criteria for a BN-S, including either DSM-5 bulimia nervosa (BN; n = 33) or purging disorder (PD: n = 20), and fell within a healthy weight range (18...
October 16, 2017: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/29044434/glp-1-increases-kiss-1-mrna-expression-in-kisspeptin-expressing-neuronal-cells
#15
Aki Oride, Haruhiko Kanasaki, Tselmeg Mijiddorj, Unurjargal Sukhbaatar, Tomomi Hara, Tuvshintugs Tumurbaatar, Satoru Kyo
Feeding-related metabolic factors exert regulatory influences on the hypothalamic-pituitary-gonadal axis. Glucagon-like peptide-1 (GLP-1) is an anorexigenic hormone synthesized from the ileum in response to food intake. The purpose of this study was to examine the direct effect of GLP-1 on hypothalamic kisspeptin and gonadotropin-releasing hormone (GnRH) expression using the rat clonal hypothalamic cell line rHypoE-8. GLP-1 significantly increased Kiss-1 mRNA expression in rHypoE-8 cells up to 1.94 ± 0.22-fold...
August 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29043993/serum-levels-of-leptin-zinc-and-tryptophan-in-obese-subjects-with-sleep-deficits
#16
Noreen Samad, Farzana Yasmin, Suad Naheed, Abu Zeeshan Bari, M Mazhar Ayaz, Aqal Zaman, Atif Akbar, Saima Saeed, Najeeb Ullah
Obesity is an important risk factor for sleep disorders. This study aimed to evaluate the association of leptin, zinc and tryptophan (TRP) in obese subjects with sleep deficits [sleep apnea (SA), insomnia (IN)]. In this cross sectional case control, with the verbal and written consent 206, obese with sleep deficits and 30, non-obese/normal identified from various areas of Karachi, Pakistan. The socio-demographic data including; age, body mass index (BMI), education and residence, of participants was collected...
July 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29042425/cardiovascular-and-metabolic-consequences-of-testosterone-supplements-in-young-and-old-male-spontaneously-hypertensive-rats-implications-for-testosterone-supplements-in-men
#17
Carolina Dalmasso, Chetan N Patil, Licy L Yanes Cardozo, Damian G Romero, Rodrigo O Maranon
BACKGROUND: The safety of testosterone supplements in men remains unclear. In the present study, we tested the hypothesis that in young and old male spontaneously hypertensive rats (SHR), long-term testosterone supplements increase blood pressure and that the mechanism is mediated in part by activation of the renin-angiotensin system. METHODS AND RESULTS: In untreated males, serum testosterone exhibited a sustained decrease after 5 months of age, reaching a nadir by 18 to 22 months of age...
October 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29041003/depression-in-the-context-of-medical-disorders-new-pharmacological-pathways-revisited
#18
Undine E Lang, Marc Walter
The depressive state has been characterised as one of elevated inflammation, changed cardiovascular parameters and a deranged metabolic situation all of which holds promise for a better understanding and handling of treatment-resistance in affective disorders as well as for future developments in treatment algorithms. In this context several biomarkers are differentially regulated by antidepressant treatment and connected to metabolic, inflammatory, cardiovascular and apoptotic components of the pathophysiology, i...
October 17, 2017: Neuro-Signals
https://www.readbyqxmd.com/read/29040067/early-onset-severe-obesity-due-to-complete-deletion-of-the-leptin-gene-in-a-boy
#19
Elif Ozsu, Serdar Ceylaner, Huseyin Onay
BACKGROUND: Monogenic obesity results from single gene mutations. Extreme obesity starting at an early age, especially in infancy, which is associated with endocrinopathy and metabolic disturbances is key to the diagnosis of monogenic obesity. CASE PRESENTATION: A 6-month-old boy was admitted to our clinic with severe obesity and food craving. He was born with a birth weight of 3400 g to first-cousin parents. He started to gain weight at an abnormal rate at the age of 2 months...
October 17, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/29039567/leptin-promotes-il%C3%A2-18-secretion-by-activating-the-nlrp3-inflammasome-in-raw-264-7-cells
#20
Sisi Fu, Lei Liu, Lei Han, Yiyun Yu
Leptin is a cytokine‑like hormone secreted by adipocytes, which serves to control energy expenditure and metabolism. In addition, leptin may modulate the innate and adaptive immune responses. The innate immune cell sensor nucleotide‑binding oligomerization domain‑like receptor family pyrin domain‑containing 3 (NLRP3) inflammasome is mainly expressed in myeloid immune cells, including macrophages. The NLRP3 inflammasome serves a pivotal role in the development and maintenance of autoimmunity and inflammation...
October 17, 2017: Molecular Medicine Reports
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