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Visceral adiposity

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https://www.readbyqxmd.com/read/28549096/the-molecular-mechanisms-of-obesity-paradox
#1
Alexios S Antonopoulos, Dimitris Tousoulis
Clinical observations suggest a complex relationship between human obesity and cardiovascular disease. Whilst abdominal (visceral) adiposity leads to deleterious metabolic disturbances, subcutaneous fat accumulation has a benign effect on cardiometabolic risk. Notably, an accumulating body of evidence paradoxically links increased body mass index with a better prognosis in patients with established cardiovascular disease, a finding that has been termed the 'obesity paradox'. While this is now acknowledged to be an epidemiological finding, a metabolically healthy obese group associated with low cardiovascular risk has also been identified...
May 26, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28548281/adverse-effects-of-fructose-on-cardiometabolic-risk-factors-and-hepatic-lipid-metabolism-in-subjects-with-abdominal-obesity
#2
Marja-Riitta Taskinen, Sanni Söderlund, Leonie H Bogl, Antti Hakkarainen, Niina Matikainen, Kirsi H Pietiläinen, Sari Räsänen, Nina Lundbom, Elias Björnson, Björn Eliasson, Rosellina M Mancina, Stefano Romeo, Natalie Alméras, Giuseppe Della Pepa, Claudia Vetrani, Anna Prinster, Giovanni Annuzzi, Angela Rivellese, Jean-Pierre Després, Jan Borén
BACKGROUND: Overconsumption of dietary sugars, fructose in particular, is linked to cardiovascular risk factors such as type 2 diabetes, obesity, dyslipidemia, and non-alcoholic fatty liver disease. However, clinical studies have to date not clarified whether these adverse cardiometabolic effects are induced directly by dietary sugars, or if they are secondary to weight gain. OBJECTIVES: To assess the effects of fructose (75 g/day), served with their habitual diet over 12 weeks, on liver fat content and other cardiometabolic risk factors in a large cohort (n=71) of abdominally obese men...
May 26, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28545230/nanog-plays-a-hierarchical-role-in-the-transcription-network-regulating-the-pluripotency-and-plasticity-of-adipose-tissue-derived-stem-cells
#3
Maria Pitrone, Giuseppe Pizzolanti, Laura Tomasello, Antonina Coppola, Lorenzo Morini, Gianni Pantuso, Romina Ficarella, Valentina Guarnotta, Sebastio Perrini, Francesco Giorgino, Carla Giordano
The stromal vascular cell fraction (SVF) of visceral and subcutaneous adipose tissue (VAT and SAT) has increasingly come into focus in stem cell research, since these compartments represent a rich source of multipotent adipose-derived stem cells (ASCs). ASCs exhibit a self-renewal potential and differentiation capacity. Our aim was to study the different expression of the embryonic stem cell markers NANOG (homeobox protein NANOG), SOX2 (SRY (sex determining region Y)-box 2) and OCT4 (octamer-binding transcription factor 4) and to evaluate if there exists a hierarchal role in this network in ASCs derived from both SAT and VAT...
May 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28545081/perturbed-adipose-tissue-hydrogen-peroxide-metabolism-in-centrally-obese-men-association-with-insulin-resistance
#4
May G Akl, Eman Fawzy, Maha Deif, Ayman Farouk, Amany K Elshorbagy
OBJECTIVE: Although adipose tissue hydrogen peroxide (H2O2) and its metabolizing enzymes have been linked to obesity and insulin resistance in animal studies, this relation remains to be evaluated in humans. METHODS: Non-diabetic men (N = 43, median age, 49 (37, 54 y)) undergoing abdominal surgeries were studied. Participants were classified by body mass index (BMI) into normal-weight (N = 19), or overweight/obese (Ow/Ob; BMI ≥25; N = 24). Centrally obese men were identified by waist-height ratio ≥0...
2017: PloS One
https://www.readbyqxmd.com/read/28543963/ageing-is-associated-with-brown-adipose-tissue-remodelling-and-loss-of-white-fat-browning-in-female-c57bl-6-mice
#5
Leidyanne Ferreira Gonçalves, Thaissa Queiroz Machado, Camila Castro-Pinheiro, Nathalia Guimaraes de Souza, Karen Jesus Oliveira, Caroline Fernandes-Santos
Fat storage changes throughout life and affects body metabolism. Ageing impact on brown (BAT) and white adipose tissue (WAT) deserves attention, especially in females, because they are less prone to age-induced weight gain. While in male mice the impact of ageing on adipose tissue remodelling is well characterized, the effects in female mice remain largely unclear. Thus, we investigated BAT and WAT remodelling during ageing in female C57BL/6 mice. At 3 months, body weight was 24 ± 0.3 g (mean±SD), and it increased from 6 to 9 months of age (+20%, P < 0...
May 24, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28543814/intra-and-interindividual-variability-of-fatty-acid-unsaturation-in-six-different-human-adipose-tissue-compartments-assessed-by-1-h-mrs-in-vivo-at-3%C3%A2-t
#6
Jürgen Machann, Norbert Stefan, Robert Wagner, Malte Bongers, Erwin Schleicher, Andreas Fritsche, Hans-Ulrich Häring, Konstantin Nikolaou, Fritz Schick
It is generally accepted that the amount and distribution of adipose tissue (AT) in the human body play an important role in the pathogenesis of metabolic diseases. In addition, metabolic effects of released saturated fatty acids (FAs) in blood are known to be more critical than those of unsaturated FAs. However, little is known about the variability in unsaturation of FAs in various AT compartments. The aim of this prospective study was the assessment of mono- and polyunsaturated FAs in various AT compartments by localized (1) H-MRS in order to obtain insight into the intra- and interindividual variability...
May 25, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28538730/blocking-fsh-induces-thermogenic-adipose-tissue-and-reduces-body-fat
#7
Peng Liu, Yaoting Ji, Tony Yuen, Elizabeth Rendina-Ruedy, Victoria E DeMambro, Samarth Dhawan, Wahid Abu-Amer, Sudeh Izadmehr, Bin Zhou, Andrew C Shin, Rauf Latif, Priyanthan Thangeswaran, Animesh Gupta, Jianhua Li, Valeria Shnayder, Samuel T Robinson, Yue Eric Yu, Xingjian Zhang, Feiran Yang, Ping Lu, Yu Zhou, Ling-Ling Zhu, Douglas J Oberlin, Terry F Davies, Michaela R Reagan, Aaron Brown, T Rajendra Kumar, Solomon Epstein, Jameel Iqbal, Narayan G Avadhani, Maria I New, Henrik Molina, Jan B van Klinken, Edward X Guo, Christoph Buettner, Shozeb Haider, Zhuan Bian, Li Sun, Clifford J Rosen, Mone Zaidi
Menopause is associated with bone loss and enhanced visceral adiposity. A polyclonal antibody that targets the β-subunit of the pituitary hormone follicle-stimulating hormone (Fsh) increases bone mass in mice. Here, we report that this antibody sharply reduces adipose tissue in wild-type mice, phenocopying genetic haploinsufficiency for the Fsh receptor gene Fshr. The antibody also causes profound beiging, increases cellular mitochondrial density, activates brown adipose tissue and enhances thermogenesis. These actions result from the specific binding of the antibody to the β-subunit of Fsh to block its action...
May 24, 2017: Nature
https://www.readbyqxmd.com/read/28537058/unusual-suspects-in-the-development-of-obesity-induced-inflammation-and-insulin-resistance-nk-cells-inkt-cells-and-ilcs
#8
REVIEW
Beatriz Dal Santo Francisco Bonamichi, Jongsoon Lee
The notion that obesity-induced inflammation mediates the development of insulin resistance in animal models and humans has been gaining strong support. It has also been shown that immune cells in local tissues, in particular in visceral adipose tissue, play a major role in the regulation of obesity-induced inflammation. Specifically, obesity increases the numbers and activation of proinflammatory immune cells, including M1 macrophages, neutrophils, Th1 CD4 T cells, and CD8 T cells, while simultaneously suppressing anti-inflammatory cells such as M2 macrophages, CD4 regulatory T cells, regulatory B cells, and eosinophils...
May 22, 2017: Diabetes & Metabolism Journal
https://www.readbyqxmd.com/read/28537054/utility-of-the-visceral-adiposity-index-and-hypertriglyceridemic-waist-phenotype-for-predicting-incident-hypertension
#9
Mohsen Janghorbani, Mohammad Reza Salamat, Ashraf Aminorroaya, Masoud Amini
BACKGROUND: The aim of this study was to assess the utility of the visceral adiposity index (VAI) and the hypertriglyceridemic waist (HTGW) phenotype as possible hypertension (HTN) predictors in a high-risk population without diabetes and HTN. METHODS: Incident HTN over a 7-year follow-up was assessed among 1,375 first-degree non-diabetic and non-hypertensive relatives of consecutive patients with type 2 diabetes who were 30 to 70 years of age. HTN was defined as a blood pressure reading ≥140/90 mm Hg or the use of antihypertensive medications...
May 19, 2017: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28535911/validation-of-a-free-software-for-unsupervised-assessment-of-abdominal-fat-in-mri
#10
Michele Maddalo, Ivan Zorza, Stefano Zubani, Giorgio Nocivelli, Giulio Calandra, Pierantonio Soldini, Lorella Mascaro, Roberto Maroldi
PURPOSE: To demonstrate the accuracy of an unsupervised (fully automated) software for fat segmentation in magnetic resonance imaging. The proposed software is a freeware solution developed in ImageJ that enables the quantification of metabolically different adipose tissues in large cohort studies. METHODS: The lumbar part of the abdomen (19cm in craniocaudal direction, centered in L3) of eleven healthy volunteers (age range: 21-46years, BMI range: 21.7-31.6kg/m(2)) was examined in a breath hold on expiration with a GE T1 Dixon sequence...
May 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28535646/-the-research-advances-in-the-relationship-between-visfatin-and-cancer
#11
W Y Tian, Y M Wang, Y F Zhang, F X Xue
Visfatin is a cytokine secreted by visceral adipose tissue, which plays an important role in obesity, diabetes, insulin resistance, atherosclerosis and polycystic ovarian syndrome. Additionally, visfatin is also involved in the metabolic syndrome-associated malignancies such as breast, colon, gastric and endometrial cancers. Visfatin inhibitor might be a potential antitumor therapeutic strategy for inhibiting the growth of many cancers.
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28534500/impact-of-fat-mass-and-distribution-on-lipid-turnover-in-human-adipose-tissue
#12
Kirsty L Spalding, Samuel Bernard, Erik Näslund, Mehran Salehpour, Göran Possnert, Lena Appelsved, Keng-Yeh Fu, Kanar Alkass, Henrik Druid, Anders Thorell, Mikael Rydén, Peter Arner
Differences in white adipose tissue (WAT) lipid turnover between the visceral (vWAT) and subcutaneous (sWAT) depots may cause metabolic complications in obesity. Here we compare triglyceride age and, thereby, triglyceride turnover in vWAT and sWAT biopsies from 346 individuals and find that subcutaneous triglyceride age and storage capacity are increased in overweight or obese individuals. Visceral triglyceride age is only increased in excessively obese individuals and associated with a lower lipid removal capacity...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28534418/quantification-of-visceral-adipose-tissue-in-polycystic-ovary-syndrome-dual-energy-x-ray-absorptiometry-versus-magnetic-resonance-imaging
#13
Signe Frøssing, Malin Chatarina Nylander, Elizaveta Chabanova, Caroline Kistorp, Sven O Skouby, Jens Faber
Background Polycystic ovary syndrome (PCOS) is associated with frequent overweight and abdominal obesity. Quantifying visceral adipose tissue (VAT) in PCOS patients can be a tool to assess metabolic risk and monitor effects of treatment. The latest dual-energy X-ray absorptiometry (DXA) technology can measure VAT and subcutaneous adipose tissue (SAT) in a clinical setting. Purpose To compare DXA-measurements of VAT and SAT with the gold standard MRI in women with PCOS. Material and Methods A cross-sectional study of 67 overweight women with PCOS was performed...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28531567/impact-of-body-composition-parameters-on-clinical-outcomes-in-patients-with-metastatic-castrate-resistant-prostate-cancer-treated-with-docetaxel
#14
Samantha J Cushen, Derek G Power, Kevin P Murphy, Ray McDermott, Brendan T Griffin, Marvin Lim, Louise Daly, Peter MacEneaney, Kathleen O' Sullivan, Carla M Prado, Aoife M Ryan
BACKGROUND: Body composition may influence clinical outcomes of certain chemotherapeutic agents. We examined the prognostic significance of skeletal muscle mass and adipose tissue on docetaxel toxicity and overall survival in patients with metastatic castrate resistant prostate cancer (mCRPC). METHODS: A retrospective review of patients medical records with mCRPC, treated with docetaxel was conducted. Body composition parameters (skeletal muscle mass, muscle attenuation [MA], visceral and subcutaneous adipose tissue) were measured at L3 by computed tomography (CT) and defined using previously established cut points...
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28529941/humans-and-mice-display-opposing-patterns-of-browning-gene-expression-in-visceral-and-subcutaneous-white-adipose-tissue-depots
#15
Maria A Zuriaga, Jose J Fuster, Noyan Gokce, Kenneth Walsh
Visceral adiposity is much more strongly associated with cardiometabolic disease in humans than subcutaneous adiposity. Browning, the appearance of brown-like adipocytes in the white adipose tissue (WAT), has been shown to protect mice against metabolic dysfunction, suggesting the possibility of new therapeutic approaches to treat obesity and type 2 diabetes. In mice, subcutaneous WAT depots express higher levels of browning genes when compared with visceral WAT, further suggesting that differences in WAT browning could contribute to the differences in the pathogenicity of the two depots...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28529732/microarray-analysis-of-differentially-expressed-genes-and-their-functions-in-omental-visceral-adipose-tissues-of-pregnant-women-with-vs-without-gestational-diabetes-mellitus
#16
Yuan Qian, Hao Sun, Hongli Xiao, Meirun Ma, Xue Xiao, Qinzai Qu
Increasing evidence has shown that insulin resistance in omental visceral adipose tissue (OVAT) is a characteristic of gestational diabetes mellitus (GDM). The present study aimed to identify differentially expressed genes (DEGs) and their associated functions and pathways involved in the pathogenesis of GDM by comparing the expression profiles of OVATs obtained from pregnant Chinese women with and without GDM during caesarian section. A total of 935 DEGs were identified, including 450 downregulated and 485 upregulated genes...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28526415/lnk-deficiency-aggregates-palmitate-induced-preadipocyte-apoptosis
#17
Jie-Yi Du, Chen-Chen Jin, Guo-Hao Wang, Xiong-Qing Huang, Jian-Ding Cheng, Xue-Jun Wen, Xiao-Miao Zhao, Guan-Lei Wang
LNK (SH2B3) is an intracellular adaptor protein that negatively regulates cellular proliferation or self-renewal of hematopoietic stem cells and some other progenitor cells. LNK is also recognized as a key regulator of insulin resistance and inflammatory responses in several tissues and organs. It is unknown the function of LNK in adipose tissue. We previously demonstrated that type 2 diabetes mellitus (T2DM) mouse model had elevated serum free fatty acids (FFAs) levels and increased preadipocyte apoptosis in visceral fat tissue, showing the occurrence of lipotoxicity...
May 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28525384/secretome-analysis-of-breast-cancer-associated-adipose-tissue-to-identify-paracrine-regulators-of-breast-cancer-growth
#18
Lapeire Lore, Hendrix An, Lecoutere Evelyne, Van Bockstal Mieke, Vandesompele Jo, Maynard Dawn, Braems Geert, Van Den Broecke Rudy, Müller Cathérine, Bracke Marc, Cocquyt Véronique, Denys Hannelore, De Wever Olivier
Adipose tissue secretes a plethora of adipokines as evidenced by characterization of subcutaneous and visceral adipose tissue secretomes. However, adipose tissue composition and secretion pattern is depot and disease dependent, influencing the adipose tissue secretome. We investigated the secretome of cancer-associated adipose tissue (CAAT) explants from breast cancer patients and explored its role in breast cancer proliferation. CAAT proteins were identified by LC-MS/MS and human protein antibody arrays and stimulated proliferation of three breast cancer cell lines...
May 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28522656/comparison-between-different-measures-of-body-fat-with-kidney-function-decline-and-incident-ckd
#19
Magdalena Madero, Ronit Katz, Rachel Murphy, Anne Newman, Kushang Patel, Joachim Ix, Carmen Peralta, Suzanne Satterfield, Linda Fried, Michael Shlipak, Mark Sarnak
BACKGROUND AND OBJECTIVES: Although anthropometric measures of body fat are associated with development of CKD, they may not be able to distinguish between various forms of fat and therefore may be less accurate than computed tomography (CT) measures. We compared the association of CT and anthropometric measures of obesity with kidney outcomes in the Health Aging and Body Composition Study. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: Participants were recruited from March of 1997 through July of 1998...
May 18, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28522646/mr-spectroscopy-of-hepatic-fat-and-adiponectin-and-leptin-levels-during-testosterone-therapy-in-type-2-diabetes-a-randomized-double-blinded-placebo-controlled-trial
#20
Line Velling Magnussen, Poul Erik Andersen, Anabel Diaz, Jelena Markovic Ostojic, Kurt Højlund, David M Hougaard, Anders Nymark Christensen, Torben Leo Nielsen, Marianne Skovsager Andersen
BACKGROUND: Men with type 2 diabetes mellitus (T2D) often have lowered testosterone levels and an increased risk of cardiovascular disease (CVD). Ectopic fat increases the risk of CVD, whereas subcutaneous gluteofemoral fat protects against CVD and has a beneficial adipokine secreting profile. HYPOTHESIS: Testosterone replacement therapy (TRT) may reduce the content of ectopic fat and improve the adipokine profile in men with T2D. DESIGN AND METHODS: A randomized, double-blinded, placebo-controlled study in 39 men aged 50-70 years with T2D and bioavailable testosterone levels <7...
May 18, 2017: European Journal of Endocrinology
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