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Adipokines and fibrosis

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https://www.readbyqxmd.com/read/28640444/impact-of-growth-hormone-on-regulation-of-adipose-tissue
#1
Katie M Troike, Brooke E Henry, Elizabeth A Jensen, Jonathan A Young, Edward O List, John J Kopchick, Darlene E Berryman
Increasing prevalence of obesity and obesity-related conditions worldwide has necessitated a more thorough understanding of adipose tissue (AT) and expanded the scope of research in this field. AT is now understood to be far more complex and dynamic than previously thought, which has also fueled research to reevaluate how hormones, such as growth hormone (GH), alter the tissue. In this review, we will introduce properties of AT important for understanding how GH alters the tissue, such as anatomical location of depots and adipokine output...
June 18, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28629772/impact-of-the-cardiovascular-system-associated-adipose-tissue-on-atherosclerotic-pathology
#2
REVIEW
Dimitry A Chistiakov, Andrey V Grechko, Veronika A Myasoedova, Alexandra A Melnichenko, Alexander N Orekhov
Cardiac obesity makes an important contribution to the pathogenesis of cardiovascular disease. One of the important pathways of this contribution is the inflammatory process that takes place in the adipose tissue. In this review, we consider the role of the cardiovascular system-associated fat in atherosclerotic cardiovascular pathology and a non-atherosclerotic cause of coronary artery disease, such as atrial fibrillation. Cardiovascular system-associated fat not only serves as the energy store, but also releases adipokines that control local and systemic metabolism, heart/vascular function and vessel tone, and a number of vasodilating and anti-inflammatory substances...
June 8, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28588299/protective-effect-of-rosiglitazone-on-kidney-function-in-high-fat-challenged-human-crp-transgenic-mice-a-possible-role-for-adiponectin-and-mir-21
#3
Martine C Morrison, Gopala K Yakala, Wen Liang, Peter Y Wielinga, Kanita Salic, Arianne van Koppen, Tushar Tomar, Robert Kleemann, Peter Heeringa, Teake Kooistra
Obesity-related albuminuria is associated with decline of kidney function and is considered a first sign of diabetic nephropathy. Suggested factors linking obesity to kidney dysfunction include low-grade inflammation, insulin resistance and adipokine dysregulation. Here, we investigated the effects of two pharmacological compounds with established anti-inflammatory properties, rosiglitazone and rosuvastatin, on kidney dysfunction during high-fat diet (HFD)-induced obesity. For this, human CRP transgenic mice were fed standard chow, a lard-based HFD, HFD+rosuvastatin or HFD+rosiglitazone for 42 weeks to study effects on insulin resistance; plasma inflammatory markers and adipokines; and renal pathology...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28533262/acute-and-chronic-changes-in-rat-soleus-muscle-after-high-fat-high-sucrose-diet
#4
Kelsey H Collins, David A Hart, Ian C Smith, Anthony M Issler, Raylene A Reimer, Ruth A Seerattan, Jaqueline L Rios, Walter Herzog
The effects of obesity on different musculoskeletal tissues are not well understood. The glycolytic quadriceps muscles are compromised with obesity, but due to its high oxidative capacity, the soleus muscle may be protected against obesity-induced muscle damage. To determine the time-course relationship between a high-fat/high-sucrose (HFS) metabolic challenge and soleus muscle integrity, defined as intramuscular fat invasion, fibrosis and molecular alterations over six time points. Male Sprague-Dawley rats were fed a HFS diet (n = 64) and killed at serial short-term (3 days, 1 week, 2 weeks, 4 weeks) and long-term (12 weeks, 28 weeks) time points...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28521681/effects-of-diets-on-adipose-tissue
#5
Silvia Ezquerro, Amaia Rodríguez, Piero Portincasa, Gema Frühbeck
Obesity is a major health problem that has become a global epidemic. Overweight and obesity are commonly associated with the development of several pathologies, such as insulin resistance, cardiovascular diseases, sleep apnea and several types of cancer, which can lead to further morbidity and mortality. An increased abdominal adiposity renders overweight and obese individuals more prone to metabolic and cardiovascular problems. In this sense, excess adiposity leads to several changes in the biology, morphology and function of the adipose tissue, such as adipocyte hypertrophy and hyperplasia, adipose tissue inflammation and fibrosis and an impaired secretion of adipokines, contributing to the onset of obesity-related co-morbidities...
May 17, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28452101/combined-low-dose-spironolactone-plus-vitamin-e-vs-vitamin-e-monotherapy-on-insulin-resistance-noninvasive-indices-of-steatosis-and-fibrosis-and-adipokine-levels-in-nonalcoholic-fatty-liver-disease-a-randomized-controlled-trial
#6
Stergios A Polyzos, Jannis Kountouras, Christos S Mantzoros, Vaia Polymerou, Panagiotis Katsinelos
The beneficial effects of mineralocorticoid receptor blockade by spironolactone have been shown in animal models of nonalcoholic fatty liver disease (NAFLD). The aim of this 52-week randomized controlled trial was to compare the efficacy of low-dose spironolactone and vitamin E combination vs. vitamin E monotherapy on insulin resistance, noninvasive indices of hepatic steatosis and fibrosis, liver tests, circulating adipokines and hormones in patients with histologically confirmed NAFLD. Homeostasis model of assessment-insulin resistance (HOMA-IR) and noninvasive indices of steatosis and fibrosis were calculated...
April 28, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28334911/mertk-rs4374383-variant-predicts-incident-nonalcoholic-fatty-liver-disease-and-diabetes-role-of-mononuclear-cell-activation-and-adipokine-response-to-dietary-fat
#7
Giovanni Musso, Maurizio Cassader, Franco De Michieli, Elena Paschetta, Silvia Pinach, Francesca Saba, Daria Bongiovanni, Luciana Framarin, Mara Berrutti, Nicola Leone, Stefania Corvisieri, Renato Parente, Federica Molinaro, Antonio Sircana, Simona Bo, Roberto Gambino
The loss-of-function rs4374383 G > A variant in Myeloid-epithelial-reproductive Tyrosine Kinase (MERTK) gene has been linked to hepatic fibrosis in chronic liver diseases. MERTK is expressed by immune and non-immune cells involved in inflammation, metabolism and vascular homeostasis. We assessed the impact of MERTK rs4374383 G > A variant on nonalcoholic fatty liver disease (NAFLD) incidence and severity and on glucose and lipid metabolism. We followed-up 305 healthy nonobese nondiabetic, metabolic syndrome-free insulin sensitive participants in a population-based study, characterized for MERTK G > A polymorphism, adipokine profile and inflammatory markers...
May 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28281237/adipokine-levels-versus-hepatic-histopathology-in-bariatric-surgery-patients
#8
Rafael Bergesch D'Incao, Cristiane Valle Tovo, Vanessa Suñé Mattevi, Diego Olschowsky Borges, Jane Maria Ulbrich, Gabriela Perdomo Coral, Mauricio Jacques Ramos, Nelson Guardiola Meinhardt
BACKGROUND: Obesity is a worldwide prevalent disease and is an underlying factor of non-alcoholic fatty liver disease (NAFLD). It has been understood as a chronic inflammatory state, being associated with the production of adipokines. The aim of this study was to analyze the levels of adipokines in the serum, visceral, and subcutaneous fat and to compare them with hepatic histopathology in morbidly obese patients. METHODS: This is a cross-sectional observational study, which analyzed the findings of liver biopsy in patients undergoing bariatric surgery and who had performed analysis of adipokines mRNA expression (adiponectin-ADIPOQ, leptin-LEP, and resistin-RETN) in subcutaneous and visceral adipose tissue and circulating adipokines in serum...
March 10, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28191635/the-role-of-epicardial-adipose-tissue-in-cardiac-biology-classic-concepts-and-emerging-roles
#9
Alexios S Antonopoulos, Charalambos Antoniades
Classic concepts about the role of epicardial adipose tissue (EpAT) in heart physiology include its role in cardiac metabolism, mechanical protection of coronaries, innervation and possibly cryoprotection of the heart too. Nevertheless, recent evidence has revealed that epicardial adipose tissue regulates multiple aspects of cardiac biology including myocardial redox state, intracellular Ca(2+) cycling, the electrophysiological and contractile properties of cardiomyocytes, cardiac fibrosis as well as coronary atherosclerosis progression...
June 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28135006/contribution-of-maladaptive-adipose-tissue-expansion-to-development-of-cardiovascular-disease
#10
Guanghong Jia, Yan Jia, James R Sowers
The overweight and obesity epidemic has led to an increase in the metabolic syndrome and associated cardiovascular disease (CVD). These abnormalities include insulin resistance, type 2 diabetes mellitus, vascular stiffness, hypertension, stroke, and coronary heart disease. Visceral white adipocyte tissue (WAT) expansion and associated fibrosis/stiffness of WAT promote insulin resistance and CVD through increases in proinflammatory adipokines, oxidative stress, activation of renin-angiotensin-aldosterone system, dysregulation of adipocyte apoptosis and autophagy, dysfunctional immune modulation, and adverse changes in the gut microbiome...
December 6, 2016: Comprehensive Physiology
https://www.readbyqxmd.com/read/27757724/can-adiponectin-help-us-to-target-diastolic-dysfunction
#11
REVIEW
Catarina Francisco, João Sérgio Neves, Inês Falcão-Pires, Adelino Leite-Moreira
Adiponectin is the most abundant adipokine and exhibits anti-inflammatory, antiatherogenic and antidiabetic properties. Unlike other adipokines, it inversely correlates with body weight and obesity-linked cardiovascular complications. Diastolic dysfunction is the main mechanism responsible for approximately half of all heart failure cases, the so-called heart failure with preserved ejection fraction (HFpEF), but therapeutic strategies specifically directed towards these patients are still lacking. In the last years, a link between adiponectin and diastolic dysfunction has been suggested...
December 2016: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/27740519/%C3%A2-chemerin-retinol-binding-protein-4-cytokeratin-18-and-transgelin-2-presence-in-sera-of-patients-with-non-alcoholic-liver-fatty-disease
#12
Agnieszka Zwolak, Agnieszka Szuster-Ciesielska, Jadwiga Daniluk, Justyna Semeniuk, Martyna Kandefer-Szerszen
 Background. Chemerin and retinol binding protein-4 (RBP-4) are adipokines which may play a role in the progression of NAFLD. It has been also suggested that cytokeratin-18 (CK-18) could be a marker of hepatocyte caspase-directed death while transgelin-2 production could reflect stage of liver fibrosis. The aim of this study was to evaluate the level of the above adipokines in sera of patients with NAFLD and determine the relation between the level of transgelin-2 and fibrosis-4 index (FIB-4). MATERIAL AND METHODS: Ninety-five subjects included initially to the study were divided into four groups: (I) prediabetics, obese with NAFLD and metabolic syndrome (MS), (II) lean with NAFLD and without MS, (III) obese without NAFLD and MS, and (IV) healthy individuals...
November 2016: Annals of Hepatology
https://www.readbyqxmd.com/read/27715401/comparison-of-early-2-days-and-later-28-days-response-of-adipose-tissue-to-very-low-calorie-diet-in-obese-women
#13
Veronika Šrámková, Lenka Rossmeislová, Eva Krauzová, Jana Kračmerová, Michal Koc, Dominique Langin, Vladimír Štich, Michaela Šiklová
CONTEXT: Beneficial metabolic effects of calorie restriction found in the early stage of hypocalorie diets may be caused by the modulation of metabolic and endocrine function of adipose tissue. OBJECTIVE: The objective of the study was to compare metabolic and inflammation-related characteristics of sc adipose tissue (SAAT) in the early (2 d) and later (28 d) phase of a very low calorie diet (VLCD). Design, Setting, Intervention, and Patients: Seventeen moderately obese premenopausal women followed an 800 kcal/d VLCD for 28 days...
December 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27337945/differences-between-perivascular-adipose-tissue-surrounding-the-heart-and-the-internal-mammary-artery-possible-role-for-the-leptin-inflammation-fibrosis-hypoxia-axis
#14
COMPARATIVE STUDY
Ioannis Drosos, Georgios Chalikias, Maria Pavlaki, Dimitra Kareli, Grigorios Epitropou, Georgios Bougioukas, Dimitrios Mikroulis, Fotios Konstantinou, Alexandra Giatromanolaki, Konstantinos Ritis, Thomas Münzel, Dimitrios Tziakas, Stavros Konstantinides, Katrin Schäfer
AIM: The factors mediating the paracrine effects of perivascular adipose tissue (PVAT) in atherosclerosis are largely unknown. The adipokine leptin has been implicated in the increased cardiovascular risk in obesity and may locally promote neointima formation independently of circulating leptin levels. In patients with established coronary artery disease, we examined the expression of leptin as well as of its possible inducers in 'cardiac' PVAT surrounding the aortic root and coronary arteries (C-PVAT), and compared it to the PVAT surrounding the internal mammary artery (IMA-PVAT), a vessel resistant to atherosclerosis...
November 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/27275102/serum-adipokines-might-predict-liver-histology-findings-in-non-alcoholic-fatty-liver-disease
#15
Raika Jamali, Mohsen Razavizade, Abbas Arj, Mohammad Hossein Aarabi
AIM: To assess significance of serum adipokines to determine the histological severity of non-alcoholic fatty liver disease. METHODS: Patients with persistent elevation in serum aminotransferase levels and well-defined characteristics of fatty liver at ultrasound were enrolled. Individuals with a history of alcohol consumption, hepatotoxic medication, viral hepatitis or known liver disease were excluded. Liver biopsy was performed to confirm non-alcoholic liver disease (NAFLD)...
June 7, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27262842/hepatokines-and-non-alcoholic-fatty-liver-disease
#16
REVIEW
Dariusz M Lebensztejn, Marta Flisiak-Jackiewicz, Irena Białokoz-Kalinowska, Anna Bobrus-Chociej, Irina Kowalska
Nowadays non-alcoholic fatty liver disease (NAFLD) is becoming the most common chronic liver pathology both in adults and children. NAFLD manifestation ranges from a simple liver steatosis to steatohepatitis (nonalcoholic steatohepatitis - NASH), which may progress to advanced fibrosis, cirrhosis and end-stage liver disease. Due to the coexistence of visceral obesity, insulin resistance and dyslipidemia, NAFLD is considered to be the hepatic manifestation of metabolic syndrome. In recent years, in the pathogenesis of metabolic syndrome, type 2 diabetes mellitus, cardiovascular disease and also NAFLD, more and more attention has been paid to the so-called organokines, proteins with both paracrine or/and endocrine activities...
2016: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/27256476/targeting-adipose-tissue-in-the-treatment-of-obesity-associated-diabetes
#17
REVIEW
Christine M Kusminski, Perry E Bickel, Philipp E Scherer
Adipose tissue regulates numerous physiological processes, and its dysfunction in obese humans is associated with disrupted metabolic homeostasis, insulin resistance and type 2 diabetes mellitus (T2DM). Although several US-approved treatments for obesity and T2DM exist, these are limited by adverse effects and a lack of effective long-term glucose control. In this Review, we provide an overview of the role of adipose tissue in metabolic homeostasis and assess emerging novel therapeutic strategies targeting adipose tissue, including adipokine-based strategies, promotion of white adipose tissue beiging as well as reduction of inflammation and fibrosis...
2016: Nature Reviews. Drug Discovery
https://www.readbyqxmd.com/read/27146467/the-metabolic-response-to-a-high-fat-diet-reveals-obesity-prone-and-resistant-phenotypes-in-mice-with-distinct-mrna-seq-transcriptome-profiles
#18
J-Y Choi, R A McGregor, E-Y Kwon, Y J Kim, Y Han, J H Y Park, K W Lee, S-J Kim, J Kim, J W Yun, M-S Choi
OBJECTIVES: The aim of this study was to explore the phenotypic differences underpinning obesity susceptibility or resistance based on the metabolic and transcriptional profiling of C57BL/6J mice fed a high-fat diet (HFD). METHODS: The mice were fed either a normal diet or HFD for 12 weeks. After 6 weeks, the mice on HFD were classified as either obesity-prone (OP) or obesity-resistant (OR) depending on the body weight gain. RESULTS: Lipid profiles from plasma and liver significantly improved in OR mice relative to the OP group...
September 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27138729/pathogenesis-of-alcoholic-liver-disease
#19
Kazushi Sugimoto, Yoshiyuki Takei
Alcoholic liver disease (ALD) has become one of the most critical health problems in many countries, including Japan. Liver injury in ALD ranges from steatosis and steatohepatitis to fibrosis, cirrhosis and hepatocellular carcinoma. Many factors are thought to contribute to the development and progression of ALD, particularly insulin resistance, generation of reactive oxygen species during alcohol metabolism, adipokines from visceral adipose tissue, and endotoxin derived from the gut. Although the pathogenesis of ALD has been widely investigated, the precise mechanisms are yet to be elucidated and many questions remain...
May 3, 2016: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/27089683/-research-progress-of-adipokines-in-cardiac-fibrosis
#20
Dan Wu, Li Li, Li-Ling Wu
Cardiac fibrosis refers to myocardial tissue excess deposition of extracellular matrix. Excessive cardiac fibrosis can lead to cardiac diastolic dysfunction, and may eventually induce heart failure. Adipo- kines are mainly secreted by adipose tissue, can regulate glucose and lipid metabolism, inflammation, immune response and cardiovascular function. Recent study show that adipokines also involved in the oc- currence and development of cardiac fibrosis, adipokines constitute pro-fibrotic and anti-fibrosis complex regulatory networks, influence the development of cardiovascular disease and prognosis...
December 2015: Sheng Li Ke Xue Jin Zhan [Progress in Physiology]
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