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https://www.readbyqxmd.com/read/29351550/differential-actions-of-ppar-%C3%AE-and-ppar-%C3%AE-%C3%AE-on-beige-adipocyte-formation-a-study-in-the-subcutaneous-white-adipose-tissue-of-obese-male-mice
#1
Tamiris Lima Rachid, Flavia Maria Silva-Veiga, Francielle Graus-Nunes, Isabele Bringhenti, Carlos Alberto Mandarim-de-Lacerda, Vanessa Souza-Mello
BACKGROUND AND AIMS: Obesity compromises adipocyte physiology. PPARs are essential to adipocyte plasticity, but its isolated role in the browning phenomenon is not clear. This study aimed to examine whether activation of PPAR-α or PPAR-β/δ could induce beige cell depots in the subcutaneous white adipose tissue of diet-induced obese mice. MATERIAL AND METHODS: Sixty animals were randomly assigned to receive a control diet (C, 10% lipids) or a high-fat diet (HF, 50% lipids) for ten weeks...
2018: PloS One
https://www.readbyqxmd.com/read/29351490/significant-improvement-in-cardiometabolic-health-in-healthy-non-obese-individuals-during-caloric-restriction-induced-weight-loss-and-weight-loss-maintenance
#2
Jasper Most, L Anne Gilmore, Steven R Smith, Hongmei Han, Eric Ravussin, Leanne M Redman
Caloric restriction (CR) triggers benefits for healthspan including decreased risk of cardiometabolic disease. In an ancillary study to CALERIE 2, a 24-month 25% CR study, we assessed the cardiometabolic effects of CR in 53 non-obese (BMI: 22-28 kg/m2) men (n=17) and women (n=36). According to the energy-balance method (doubly labeled water and changes in body energy stores), the 25% CR intervention (n=34) produced 17{plus minus}1% (mean{plus minus}SE) and 14{plus minus}1% CR after 12 and 24 months (M12, M24), resulting in significant weight loss (M12: -9{plus minus}0...
December 12, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29338526/associations-of-abdominal-subcutaneous-and-visceral-fat-with-insulin-resistance-and-secretion-differ-between-men-and-women-the-netherlands-epidemiology-of-obesity-study
#3
Renée de Mutsert, Karin Gast, Ralph Widya, Eelco de Koning, Ingrid Jazet, Hildo Lamb, Saskia le Cessie, Albert de Roos, Jan Smit, Frits Rosendaal, Martin den Heijer
BACKGROUND: Abdominal obesity is a well-established risk factor for the development of type 2 diabetes. However, sex differences may exist. We aimed to investigate the associations of abdominal subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) with insulin resistance and insulin secretion in men and women. METHODS: In this cross-sectional analysis of the Netherlands Epidemiology of Obesity study, fasting and postprandial concentrations of glucose and insulin were measured and abdominal fat depots were assessed using magnetic resonance imaging in 2253 participants (53% women)...
January 17, 2018: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/29335416/lack-of-pronounced-changes-in-the-expression-of-fatty-acid-handling-proteins-in-adipose-tissue-and-plasma%C3%A2-of-morbidly-obese-humans
#4
Ewa Anna Grzegorczyk, Ewa Harasim-Symbor, Bartlomiej Lukaszuk, Dorota Harasiuk, Barbara Choromanska, Piotr Mysliwiec, Malgorzata Zendzian-Piotrowska, Adrian Chabowski
BACKGROUND/OBJECTIVES: Fatty acid handling proteins are involved in the process of accumulation of lipids in different fat tissue depots. Thus, the aim of the study was to estimate the expression of both fatty acid transport and binding proteins in the subcutaneous (SAT) and visceral adipose tissue (VAT) of patients with morbid obesity without metabolic syndrome, as well as the plasma concentrations of these transporters. SUBJECTS/METHODS: Protein (Western blotting) and mRNA (Real-time PCR) expression of selected fatty acid handling proteins was assessed in the visceral and subcutaneous adipose tissue of 30 patients with morbid obesity...
January 15, 2018: Nutrition & Diabetes
https://www.readbyqxmd.com/read/29327704/emerging-nonmetabolic-functions-of-skin-fat
#5
REVIEW
Christian F Guerrero-Juarez, Maksim V Plikus
Although the major white adipose depots evolved primarily to store energy, secrete hormones and thermo-insulate the body, multiple secondary depots developed additional specialized and unconventional functions. Unlike any other fat tissue, dermal white adipose tissue (dWAT) evolved a large repertoire of novel features that are central to skin physiology, which we discuss in this Review. dWAT exists in close proximity to hair follicles, the principal appendages of the skin that periodically grow new hairs. Responding to multiple hair-derived signals, dWAT becomes closely connected to cycling hair follicles and periodically cycles itself...
January 12, 2018: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/29323052/quantification-of-intermuscular-and-intramuscular-adipose-tissue-using-magnetic-resonance-imaging-after-neurodegenerative-disorders
#6
REVIEW
Madoka Ogawa, Robert Lester, Hiroshi Akima, Ashraf S Gorgey
Ectopic adiposity has gained considerable attention because of its tight association with metabolic and cardiovascular health in persons with spinal cord injury (SCI). Ectopic adiposity is characterized by the storage of adipose tissue in non-subcutaneous sites. Magnetic resonance imaging (MRI) has proven to be an effective tool in quantifying ectopic adiposity and provides the opportunity to measure different adipose depots including intermuscular adipose tissue (IMAT) and intramuscular adipose tissue (IntraMAT) or intramuscular fat (IMF)...
December 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29321243/adipose-depot-specific-effects-of-ileal-interposition-surgery-in-ucd-t2d-rats-unexpected-implications-for-obesity-and-diabetes
#7
Connie Hung, Casey Bronec, Eleonora Napoli, James Graham, Kimber L Stanhope, Ilaria Marsilio, Maria Cecilia Giron, Peter J Havel, Cecilia Giulivi
Ileal interposition (IT) surgery delays the onset of diabetes in a rat model of type-2 diabetes (UCD-T2DM). Here, to gain a deeper understanding of the molecular events underlying the effects of IT surgery, we examined the changes in the proteome of 4 white adipose depots (retroperitoneal, mesenteric, inguinal, and epididymal), and plasma free fatty acid profile in pre-diabetic rats 1.5 months following IT or sham surgery. The IT-mediated changes were exerted mainly in mesenteric fat, and spanned from delayed adipocyte maturation to a neuroendocrine remodeling...
January 10, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29320705/an-adipose-tissue-atlas-an-image-guided-identification-of-human-like-bat-and-beige-depots-in-rodents
#8
Fang Zhang, Guiyang Hao, Mengle Shao, Kien Nham, Yu An, Qiong Wang, Yi Zhu, Christine M Kusminski, Gedaa Hassan, Rana K Gupta, Qiwei Zhai, Xiankai Sun, Philipp E Scherer, Orhan K Oz
[18F]Fluorodeoxyglucose-PET/CT (18F-FDG-PET/CT) imaging has been invaluable for visualizing metabolically active adipose tissues in humans with potential anti-diabetic and anti-obesity effects. To explore whether mice display human-like fat depots in anatomically comparable regions, we mapped fat depots using glucose or fatty acid imaging tracers, such as 18F-FDG through PET/CT or [123/125I]-β-methyl-p-iodophenyl-pentadecanoic acid with SPECT/CT imaging, to analogous depots in mice. Using this type of image analysis with both probes, we define a large number of additional areas of high metabolic activity corresponding to novel fat pads...
January 9, 2018: Cell Metabolism
https://www.readbyqxmd.com/read/29320703/three-dimensional-adipose-tissue-imaging-reveals-regional-variation-in-beige-fat-biogenesis-and-prdm16-dependent-sympathetic-neurite-density
#9
Jingyi Chi, Zhuhao Wu, Chan Hee J Choi, Lily Nguyen, Saba Tegegne, Sarah E Ackerman, Audrey Crane, François Marchildon, Marc Tessier-Lavigne, Paul Cohen
While the cell-intrinsic pathways governing beige adipocyte development and phenotype have been increasingly delineated, comparatively little is known about how beige adipocytes interact with other cell types in fat. Here, we introduce a whole-tissue clearing method for adipose that permits immunolabeling and three-dimensional profiling of structures including thermogenic adipocytes and sympathetic innervation. We found that tissue architecture and sympathetic innervation differ significantly between subcutaneous and visceral depots...
January 9, 2018: Cell Metabolism
https://www.readbyqxmd.com/read/29318960/the-role-of-inflammation-in-epicardial-adipose-tissue-in-heart-diseases
#10
Zdenek Matloch, Anna Cinkajzlova, Milos Mraze, Martin Haluzik
Epicardial adipose tissue is not only a specific adipose tissue depot but also an active endocrine organ producing numerous substances with an important role in the development of obesity-related heart diseases. It is located between myocardium and visceral pericardium and consists predominantly of adipocytes, immunocompetent cells, ganglia and interconnecting nerve branches. Several studies documented a positive correlation between pericardial and epicardial fat and left ventricular hypertrophy and septal thickening, leading to diastolic dysfunction, electrocardiographic abnormalities and facilitating cardiac failure...
January 9, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29301516/the-effect-of-dapagliflozin-treatment-on-epicardial-adipose-tissue-volume
#11
Takao Sato, Yoshifusa Aizawa, Sho Yuasa, Shohei Kishi, Koichi Fuse, Satoshi Fujita, Yoshio Ikeda, Hitoshi Kitazawa, Minoru Takahashi, Masahito Sato, Masaaki Okabe
BACKGROUND: Glycosuria produced by sodium-glucose co-transporter-2 (SGLT-2) inhibitors is associated with weight loss. SGLT-2 inhibitors reportedly might reduce the occurrence of cardiovascular events. Epicardial adipose tissue (EAT) is a pathogenic fat depot that may be associated with coronary atherosclerosis. The present study evaluated the relationship between an SGLT-2 inhibitor (dapagliflozin) and EAT volume. METHODS: In 40 diabetes mellitus patients with coronary artery disease (10 women and 30 men; mean age of all 40 patients was 67...
January 4, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29289646/differential-contribution-of-pomc-and-agrp-neurons-to-the-regulation-of-regional-autonomic-nerve-activity-by-leptin
#12
Balyssa B Bell, Shannon M Harlan, Donald A Morgan, Deng-Fu Guo, Kamal Rahmouni
OBJECTIVES: The autonomic nervous system is critically involved in mediating the control by leptin of many physiological processes. Here, we examined the role of the leptin receptor (LepR) in proopiomelanocortin (POMC) and agouti-related peptide (AgRP) neurons in mediating the effects of leptin on regional sympathetic and parasympathetic nerve activity. METHODS: We analyzed how deletion of the LepR in POMC neurons (POMCCre/LepRfl/fl mice) or AgRP neurons (AgRPCre/LepRfl/fl mice) affects the ability of leptin to increase sympathetic and parasympathetic nerve activity...
December 18, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29286302/microrna-27b-depletion-enhances-endotrophic-and-intravascular-lipid-accumulation-and-induces-adipocyte-hyperplasia-in-zebrafish
#13
Chia-Chun Hsu, Chi-Yu Lai, Chiu-Ya Lin, Kun-Yun Yeh, Guor Mour Her
miR-27b has emerged as a regulatory hub in cholesterol and lipid metabolism, and as a potential therapeutic target for treating atherosclerosis and obesity. However, the impact of miR-27b on lipid levels in vivo remains to be determined. Zebrafish lipids are normally stored as triacylglycerols (TGs) and their main storage sites are visceral, intramuscular, and subcutaneous lipid depots, and not blood vessels and liver. In this study, we applied microRNA-sponge (miR-SP) technology and generated zebrafish expressing transgenic miR-27b-SP (C27bSPs), which disrupted endogenous miR-27b activity and induced intravascular lipid accumulation (hyperlipidemia) and the early onset of nonalcoholic fatty liver disease (NAFLD) and nonalcoholic steatohepatitis (NASH)...
December 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29282499/quantitative-proteomic-analysis-of-murine-white-adipose-tissue-for-peritoneal-cancer-metastasis
#14
Peter E Feist, Elizabeth A Loughran, M Sharon Stack, Amanda B Hummon
Cancer metastasis risk increases in older individuals, but the mechanisms for this risk increase are unclear. Many peritoneal cancers, including ovarian cancer, preferentially metastasize to peritoneal fat depots. However, there is a dearth of studies exploring aged peritoneal adipose tissue in the context of cancer. Because adipose tissue produces signals which influence several diseases including cancer, proteomics of adipose tissue in aged and young mice may provide insight into metastatic mechanisms. We analyzed mesenteric, omental, and uterine adipose tissue groups from the peritoneal cavities of young and aged C57BL/6J mouse cohorts with a low-fraction SDS-PAGE gelLC-MS/MS method...
December 27, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29279183/increased-fibrosis-a-novel-means-by-which-gh-influences-white-adipose-tissue-function
#15
Lara A Householder, Ross Comisford, Silvana Duran-Ortiz, Kevin Lee, Katie Troike, Cody Wilson, Adam Jara, Mitchell Harberson, Edward O List, John J Kopchick, Darlene E Berryman
OBJECTIVE: White adipose tissue (WAT) fibrosis - the buildup of extracellular matrix (ECM) proteins, primarily collagen - is now a recognized hallmark of tissue dysfunction and is increased with obesity and lipodystrophy. While growth hormone (GH) is known to increase collagen in several tissues, no previous research has addressed its effect on ECM in WAT. Thus, the purpose of this study is to determine if GH influences WAT fibrosis. DESIGN: This study examined WAT from four distinct strains of GH-altered mice (bGH and GHA transgenic mice as well as two tissue specific GH receptor gene disrupted lines, fat growth hormone receptor knockout or FaGHRKO and liver growth hormone receptor knockout or LiGHRKO mice)...
December 20, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/29241969/relation-of-ectopic-fat-with-atherosclerotic-cardiovascular-disease-risk-score-in-south-asians-living-in-the-united-states-from-the-mediators-of-atherosclerosis-in-south-asians-living-in-america-masala-study
#16
Morgana Mongraw-Chaffin, Unjali P Gujral, Alka M Kanaya, Namratha R Kandula, John Jeffrey Carr, Cheryl A M Anderson
Few studies have investigated the association between ectopic fat from different depots and cardiovascular risk scores and their components in the same population, and none have investigated these relations in South Asians. In a cross-sectional analysis of 796 participants in the Mediators of Atherosclerosis in South Asians Living in America (MASALA) study who had measurements of visceral, subcutaneous, pericardial, hepatic, and intermuscular fat from abdominal and cardiac computed tomography scans, we used linear regression to determine the associations of 1 standard deviation difference in each ectopic fat depot with pooled cohort risk score and its components...
October 31, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29230714/obesity-phenotypes-depot-differences-in-adipose-tissue-and-their-clinical-implications
#17
REVIEW
Valeria Guglielmi, Paolo Sbraccia
Obesity, defined as excess fat mass, increases risks for multiple chronic diseases, such as type 2 diabetes, cardiovascular disease, and several types of cancer. Beyond adiposity per se, the pattern of fat distribution, android or truncal as compared to gynoid or peripheral, has a profound influence on systemic metabolism and hence risk for obesity complications. Not only factors as genetics, environment, gender, and age account for the apparent compartmentalization of white adipose tissue (WAT) in the body...
December 11, 2017: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/29224089/cellular-mechanisms-driving-sex-differences-in-adipose-tissue-biology-and-body-shape-in-humans-and-mouse-models
#18
Kalypso Karastergiou, Susan K Fried
Sex differences in adipose tissue distribution and the metabolic, endocrine, and immune functions of different anatomical fat depots have been described, but they are incompletely documented in the literature. It is becoming increasingly clear that adipose depots serve distinct functions in males and females and have specific physiological roles. However, the mechanisms that regulate the size and function of specific adipose tissues in men and women remain poorly understood. New insights from mouse models have advanced our understanding of depot differences in adipose growth and remodeling via the proliferation and differentiation of adipose progenitors that can expand adipocyte number in the tissue or simply replace dysfunctional older and larger adipocytes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29224088/sex-differences-in-body-composition
#19
Miriam A Bredella
Body composition differs between men and women. Men have more lean mass, and women have more fat mass than men. Men are more likely to accumulate adipose tissue around the trunk and abdomen, whereas women usually accumulate adipose tissue around the hips and thighs. Less is known about sex differences in ectopic fat depots. Advances in imaging allow the noninvasive assessment of abdominal and femorogluteal fat compartments, intramyocellular lipids, intrahepatic lipids, pericardial adipose tissue, and neck adipose tissue including brown adipose tissue and tongue adipose tissue...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29216392/dioxin-like-pcb-126-increases-systemic-inflammation-and-accelerates-atherosclerosis-in-lean-ldl-receptor-deficient-mice
#20
Michael C Petriello, J Anthony Brandon, Jessie Hoffman, Chunyan Wang, Himi Tripathi, Ahmed Abdel-Latif, Xiang Ye, Xiangan Li, Liping Yang, Eun Lee, Sony Soman, Jazmyne Barney, Banrida Wahlang, Bernhard Hennig, Andrew J Morris
Exposure to dioxins and related persistent organic pollutants likely contributes to cardiovascular disease (CVD) risk through multiple mechanisms including the induction of chronic inflammation. Epidemiological studies have shown that leaner individuals may be more susceptible to the detrimental effects of lipophilic toxicants because they lack large adipose tissue depots that can accumulate and sequester these pollutants. This phenomenon complicates efforts to study mechanisms of pollutant-accelerated atherosclerosis in experimental animal models where high-fat feeding and adipose expansion limit the bioavailability of lipophilic pollutants...
December 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
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