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adipose tissue inflammation

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https://www.readbyqxmd.com/read/28238606/comparison-of-associations-of-dxa-and-ct-visceral-adipose-tissue-measures-with-insulin-resistance-lipid-levels-and-inflammatory-markers
#1
John T Schousboe, Lisa Langsetmo, Ann V Schwartz, Brent C Taylor, Tien N Vo, Allyson M Kats, Elizabeth Barrett-Connor, Eric S Orwoll, Lynn M Marshall, Iva Miljkovic, Nancy E Lane, Kristine E Ensrud
Visceral adipose tissue (VAT) measured by computed tomography (CT) is related to insulin resistance, lipids, and serum inflammatory markers. Our objective was to compare the strength of the associations of VAT measured using dual-energy X-ray absorptiometry (DXA-VAT) and CT (CT-VAT) with insulin resistance, serum lipids, and serum markers of inflammation. For 1117 men aged 65 and older enrolled in the Osteoporotic Fractures in Men Study, the cross-sectional associations of DXA-VAT and CT-VAT with homeostasis model assessment of insulin resistance (homa2ir), C-reactive protein, and high-density lipoprotein (HDL) cholesterol were estimated with regression models and compared using a Hausman test...
February 23, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28237848/il-17-axis-accelerates-the-inflammatory-progression-of-obese-in-mice-via-tbk1-and-ikbke-pathway
#2
Seung Hoon Lee, JooYeon Jhun, Jae-Kyung Byun, Eun-Kyung Kim, KyoungAh Jung, Ji Eun Lee, Jong Young Choi, Sung-Hwan Park, Mi-La Cho
Obesity mediates immune inflammatory response and induces IL-17 expression. Adipgenesis can be regulated by IL-17 and it causes TBK1 activation. The inhibition of TBK1 and the inhibition of I IKBKE reduces inflammatory response and improves obesity. It is hypothesized that IL-17 deficiency inhibits obesity progression and inflammation. 3T3-L1 preadipocytes were differentiated in vitro and treated with IL-17. RAW264.7 cells and differentiated 3T3-L1 were pretreated with TBK1 inhibitor and then stimulated with IL-17...
February 22, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28237179/translating-the-biology-of-adipokines-in-atherosclerosis-and-cardiovascular-diseases-gaps-and-open-questions
#3
REVIEW
M Ruscica, A Baragetti, A L Catapano, G D Norata
AIM: Critically discuss the available data, to identify the current gaps and to provide key concepts that will help clinicians in translating the biology of adipokines in the context of atherosclerosis and cardio-metabolic diseases. DATA SYNTHESIS: Adipose tissue is nowadays recognized as an active endocrine organ, a function related to the ability to secrete adipokines (such as leptin and adiponectin) and pro-inflammatory cytokines (tumor necrosis factor alpha and resistin)...
December 23, 2016: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28236429/adiponectin-improves-endothelial-function-in-mesenteric-arteries-of-high-fat-fed-wistar-rats-role-of-perivascular-adipose-tissue
#4
Cristina M Sena, Ana Pereira, Rosa Fernandes, Liliana Letra, Raquel M Seiça
BACKGROUND AND PURPOSE: Adiponectin, the most abundant peptide secreted by adipocytes, is involved in the regulation of energy metabolism and vascular physiology. Thus, we investigated the effects of exogenous administration of adiponectin on metabolism, vascular reactivity and perivascular adipose tissue (PVAT) of rat mesenteric arteries in high-fat fed Wistar rats. EXPERIMENTAL APPROACH: The effects of adiponectin were investigated on nitric oxide (NO)-dependent and independent vasorelaxation in isolated rat mesenteric arteries from 12-month-old male Wistar rats fed with high-fat diet during 4 months (HFD) and compared with age-matched control Wistar rats (W12m)...
February 25, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28228829/hepatic-iron-storage-is-related-to-body-adiposity-and-hepatic-inflammation
#5
Chan Yoon Park, Jayong Chung, Kyung-Ok Koo, Min Soo Kim, Sung Nim Han
BACKGROUND: Obesity has been reported to be associated with iron deficiency. However, few studies have investigated iron status in low adiposity. To investigate whether body adiposity was associated with altered hepatic iron status, we compared liver iron levels and markers involved in inflammation and iron absorption in obese, control, and mildly calorie restricted mice. METHODS: Seven week old C57BL/6 mice were fed control (10% kcal fat, Control) or high fat (60% kcal fat, HFD) diets, or reduced amount of control diet to achieve 15% calorie restriction (CR) for 16 weeks...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28226002/serum-levels-of-leptin-and-adiponectin-and-clinical-parameters-in-women-with-fibromyalgia-and-overweight-obesity
#6
Eduardo S Paiva, Aline Andretta, Emmanuelle Dias Batista, Márcia Maria Marques Teles Lobo, Renata Costa de Miranda, Renato Nisihara, Maria Eliana Madalozzo Schieferdecker, César L Boguszewski
Objectives: The objectives of this study were to evaluate the serum levels of adipokines in women with fibromyalgia with and without overweight/obesity, and to correlate the adipokines levels with clinical parameters associated with fibromyalgia and adipose tissue mass (body fat). Subjects and methods: The study included 100 women divided into four groups: (a) fibromyalgia and overweight/obesity; (b) fibromyalgia and normal weight; (c) controls and overweight/obesity; and (d) controls and normal weight...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28225880/the-role-of-oxidative-stress-on-the-pathophysiology-of-metabolic-syndrome
#7
Fabiane Valentini Francisqueti, Lidiana Camargo Talon Chiaverini, Klinsmann Carolo Dos Santos, Igor Otávio Minatel, Carolina Berchieri Ronchi, Artur Junio Togneri Ferron, Ana Lúcia A Ferreira, Camila Renata Corrêa
Metabolic syndrome (MetS) has a high prevalence around the world. Considering the components used to classify MetS, it is clear that it is closely related to obesity. These two conditions begin with an increase in abdominal adipose tissue, which is metabolically more active, containing a greater amount of resident macrophages compared to other fat deposits. Abdominal adiposity promotes inflammation and oxidative stress, which are precursors of various complications involving MetS components, namely insulin resistance, hypertension and hyperlipidemia...
January 1, 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28223291/ctrp7-deletion-attenuates-obesity-linked-glucose-intolerance-adipose-tissue-inflammation-and-hepatic-stress
#8
Pia S Petersen, Xia Lei, Risa M Wolf, Susana Rodriguez, Stefanie Y Tan, Hannah C Little, Michael A Schweitzer, Thomas H Magnuson, Kimberley E Steele, G William Wong
Chronic low-grade inflammation and cellular stress are important contributors to obesity-linked metabolic dysfunction. Here, we uncover an immune-metabolic role for C1q/TNF-related protein 7 (CTRP7), a secretory protein of the C1q family with previously unknown function. In obese humans, circulating CTRP7 levels were markedly elevated and positively correlated with BMI, glucose, insulin, insulin resistance index, hemoglobin A1c, and triglyceride levels. Expression of CTRP7 in liver was also significantly upregulated in obese humans and positively correlated with gluconeogenic genes...
February 21, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28223054/epicardial-adipose-tissue-removal-potentiates-outward-remodeling-and-arrests-coronary-atherogenesis
#9
Mikaela L McKenney-Drake, Stacey D Rodenbeck, Rebecca S Bruning, Ayeeshik Kole, Kyle W Yancey, Mouhamad Alloosh, Harold S Sacks, Michael Sturek
BACKGROUND: Pericoronary epicardial adipose tissue (cEAT) serves as a metabolic and paracrine organ that contributes to inflammation and is associated with macrovascular coronary artery disease (CAD) development. Although there is a strong correlation in humans between cEAT volume and CAD severity, there remains a paucity of experimental data demonstrating a causal link of cEAT to CAD. The current study tested the hypothesis that surgical resection of cEAT attenuates inflammation and CAD progression...
February 18, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28222422/impact-of-diet-and-or-exercise-intervention-on-infrapatellar-fat-pad-morphology-secondary-analysis-from-the-intensive-diet-and-exercise-for-arthritis-idea-trial
#10
Aarón Leonardo Pogacnik Murillo, Felix Eckstein, Wolfgang Wirth, Daniel Beavers, Richard F Loeser, Barbara J Nicklas, Shannon L Mihalko, Gary D Miller, David J Hunter, Stephen P Messier
OBJECTIVES: The infrapatellar fat pad (IPFP) represents intra-articular adipose tissue that may contribute to intra-articular inflammation and pain by secretion of proinflammatory cytokines. Here we examined the impact of weight loss by diet and/or exercise interventions on the IPFP volume. METHODS: Intensive Diet and Exercise for Arthritis (IDEA) was a single-blinded, single-center, 18-month, prospective, randomized controlled trial that enrolled 454 overweight and obese older adults with knee pain and radiographic osteoarthritis...
February 22, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28213287/butein-induction-of-ho-1-by-p38-mapk-nrf2-pathway-in-adipocytes-attenuates-high-fat-diet-induced-adipose-hypertrophy-in-mice
#11
Zheng Wang, Sun-O Ka, Youngyi Lee, Byung-Hyun Park, Eun Ju Bae
Adipose tissue inflammation and oxidative stress are key components in the development of obesity and insulin resistance. Heme oxygenase (HO)-1 in adipocytes protects against obesity and adipose dysfunction. In this study, we report the identification of butein, a flavonoid chalcone, as a novel inducer of HO-1 expression in adipocytes in vitro and in vivo. Butein upregulated HO-1 mRNA and protein expression in 3T3-L1 adipocytes, accompanied by Kelch-Like ECH-Associated Protein (Keap) 1 degradation and increase in the nuclear level of nuclear factor erythroid 2-related factor 2 (Nrf2)...
February 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28212710/ctrp1-in-liver-disease
#12
P Shabani, S Emamgholipour, M Doosti
Nonalcoholic fatty liver disease (NAFLD) is a chronic liver disease occurs in significant percentage of general population. NAFLD is closely associated with entire spectrum of metabolic-related disorders including diabetes, obesity, and cardiovascular diseases. Considering several similar pathways underpinning metabolic disorders, presence of common molecular mediators contributing to pathomechanism of these disorders is expected. Mounting evidence has demonstrated important role of adipokines in the context of NAFLD...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28209760/glucoraphanin-ameliorates-obesity-and-insulin-resistance-through-adipose-tissue-browning-and-reduction-of-metabolic-endotoxemia-in-mice
#13
Naoto Nagata, Liang Xu, Susumu Kohno, Yusuke Ushida, Yudai Aoki, Ryohei Umeda, Nobuo Fuke, Fen Zhuge, Yinhua Ni, Mayumi Nagashimada, Chiaki Takahashi, Hiroyuki Suganuma, Shuichi Kaneko, Tsuguhito Ota
Low-grade sustained inflammation links obesity to insulin resistance and nonalcoholic fatty liver disease (NAFLD). However, therapeutic approaches to improve systemic energy balance and chronic inflammation in obesity are limited. Pharmacological activation of nuclear factor (erythroid-derived 2)-like 2 (Nrf2) alleviates obesity and insulin resistance in mice; however, Nrf2 inducers are not clinically available owing to safety concerns. Thus, we examined whether dietary glucoraphanin, a stable precursor of the Nrf2 inducer sulforaphane, ameliorates systemic energy balance, chronic inflammation, insulin resistance, and NAFLD in high-fat diet (HFD)-fed mice...
February 16, 2017: Diabetes
https://www.readbyqxmd.com/read/28202393/role-of-a1-and-a2a-adenosine-receptor-agonists-in-adipose-tissue-inflammation-induced-by-obesity-in-mice
#14
Caroline Candida DeOliveira, Cintia Rabelo E Paiva Caria, Erica Martins Ferreira Gotardo, Marcelo Lima Ribeiro, Alessandra Gambero
Adenosine receptors are expressed in adipose tissue and control physiological and pathological events such as lipolysis and inflammation. The aim of this study was to evaluate the activity of N(6)-cyclopentyladenosine (CPA), a potent and selective A1 adenosine receptor agonist; 2-p-(2-carboxyethyl)phenethylamino-5'-N-ethylcarboxyamidoadenosine hydrochloride (CGS-21680), an A2A adenosine receptor agonist; and 5'-N-ethylcarboxamidoadenosine (NECA), a potent non-selective adenosine receptor agonist on adipose tissue inflammatory alterations induced by obesity in mice...
February 13, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28198418/circulating-classical-monocytes-are-associated-with-cd11c-macrophages-in-human-visceral-adipose-tissue
#15
Kristiaan Wouters, Katrien Gaens, Mitchell Bijnen, Kenneth Verboven, Johan Jocken, Suzan Wetzels, Erwin Wijnands, Dominique Hansen, Marleen van Greevenbroek, Adriaan Duijvestijn, Erik A L Biessen, Ellen E Blaak, Coen D A Stehouwer, Casper G Schalkwijk
Immune cell accumulation in adipose tissue (AT) is associated with the development of AT inflammation, resulting in metabolic dysfunction. Circulating immune cell patterns may reflect immune cell accumulation in expanding AT. However, data linking human leukocytes in blood and AT is lacking. We investigated whether blood immune cell populations are associated with their counterparts in subcutaneous (scAT) or visceral AT (vAT). Flow cytometry was performed on blood, scAT and vAT from 16 lean and 29 obese men...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28196858/the-2016-walter-b-cannon-lecture-deconstructing-metabolic-inflammation-using-cellular-systems
#16
Kenny L Chan, Parastoo Boroumand, Marciane Milanski, Nicolas J Pillon, Philip J Bilan, Amira Klip
Over the past years we have embarked in a systematic analysis of the effect of obesity or fatty acids on circulating monocytes, microvascular endothelial cells, macrophages and skeletal muscle cells. Using cell culture strategies, we have deconstructed complex physiological systems, then reconstructed 'partial equations' to better understand cell-to-cell communication. Through these approaches we identified that in high saturated fat environments, cell-autonomous pro-inflammatory pathways are activated in monocytes and endothelial cells, promoting monocyte adhesion and transmigration...
February 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28196086/nopal-feeding-reduces-adiposity-intestinal-inflammation-and-shifts-the-cecal-microbiota-and-metabolism-in-high-fat-fed-rats
#17
Sofia Moran-Ramos, Xuan He, Elizabeth L Chin, Armando R Tovar, Nimbe Torres, Carolyn M Slupsky, Helen E Raybould
Nopal is a cactus plant widely consumed in Mexico that has been used in traditional medicine to aid in the treatment of type-2 diabetes. We previously showed that chronic consumption of dehydrated nopal ameliorated hepatic steatosis in obese (fa/fa) rats; however, description of the effects on other tissues is sparse. The aim of the present study was to investigate the effects of nopal cladode consumption on intestinal physiology, microbial community structure, adipose tissue, and serum biochemistry in diet-induced obese rats...
2017: PloS One
https://www.readbyqxmd.com/read/28194905/a-proinflammatory-secretome-mediates-the-impaired-immunopotency-of-human-mesenchymal-stromal-cells-in-elderly-patients-with-atherosclerosis
#18
Özge Kizilay Mancini, Maximilien Lora, Dominique Shum-Tim, Stephanie Nadeau, Francis Rodier, Inés Colmegna
Inflammation plays a pivotal role in the initiation and progression of atherosclerosis (ATH). Due to their potent immunomodulatory properties, mesenchymal stromal cells (MSCs) are evaluated as therapeutic tools in ATH and other chronic inflammatory disorders. Aging reduces MSCs immunopotency potentially limiting their therapeutic utility. The mechanisms that mediate the effect of age on MSCs immune-regulatory function remain elusive and are the focus of this study. Human adipose tissue-derived MSCs were isolated from patients undergoing coronary artery bypass graft surgery...
February 14, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28194257/is-p53-involved-in-tissue-specific-insulin-resistance-formation
#19
REVIEW
Justyna Strycharz, Jozef Drzewoski, Janusz Szemraj, Agnieszka Sliwinska
p53 constitutes an extremely versatile molecule, primarily involved in sensing the variety of cellular stresses. Functional p53 utilizes a plethora of mechanisms to protect cell from deleterious repercussions of genotoxic insults, where senescence deserves special attention. While the impressive amount of p53 roles has been perceived solely by the prism of antioncogenic effect, its presence seems to be vastly connected with metabolic abnormalities underlain by cellular aging, obesity, and inflammation. p53 has been found to regulate multiple biochemical processes such as glycolysis, oxidative phosphorylation, lipolysis, lipogenesis, β-oxidation, gluconeogenesis, and glycogen synthesis...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28193830/il-6-regulates-m2-polarization-and-local-proliferation-of-adipose-tissue-macrophages-in-obesity
#20
Julia Braune, Ulrike Weyer, Constance Hobusch, Jan Mauer, Jens C Brüning, Ingo Bechmann, Martin Gericke
Obesity is associated with chronic low-grade inflammation of adipose tissue (AT) and an increase of AT macrophages (ATMs) that is linked to the onset of type 2 diabetes. We have recently shown that focal sites of inflammation around dying adipocytes, so-called crown-like structures, exhibit a unique microenvironment for macrophage proliferation. Interestingly, locally proliferating macrophages were not classically activated (M1), but they exhibited a rather alternatively activated (M2) immune phenotype. In this study, we established organotypic cell cultures of AT explants to study the impact of cytokine treatment on local ATM proliferation, without the bias of early monocyte recruitment...
February 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
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