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Adipose metabolic

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https://www.readbyqxmd.com/read/28812211/the-immune-system-in-obesity-developing-paradigms-amidst-inconvenient-truths
#1
REVIEW
Madhur Agrawal, Philip A Kern, Barbara S Nikolajczyk
PURPOSE OF REVIEW: Adipose tissue (AT) houses both innate and adaptive immune systems that are crucial for preserving AT function and metabolic homeostasis. In this review, we summarize recent information regarding progression of obesity-associated AT inflammation and insulin resistance. We additionally consider alterations in AT distribution and the immune system in males vs. females and among different racial populations. RECENT FINDINGS: Innate and adaptive immune cell-derived inflammation drives insulin resistance both locally and systemically...
August 15, 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28811650/diet-induced-obesity-leads-to-metabolic-dysregulation-in-offspring-via-endoplasmic-reticulum-stress-in-a-sex-specific-manner
#2
J H Park, Y Yoo, M Cho, J Lim, A M Lindroth, Y J Park
BACKGROUND/OBJECTIVES: Exposure to metabolic stress has been suggested to influence the susceptibility to metabolic disorders in offspring according to epidemiological and animal studies. Nevertheless, molecular mechanisms remain unclear. We investigated impacts of diet-induced paternal obesity on metabolic phenotypes in offspring and its underlying molecular mechanism. SUBJECTS/METHODS: Male founder mice (F0), fed with control diet (CD) or high fat diet (HFD), were mated with CD-fed females...
August 16, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28811616/synthesis-free-pet-imaging-of-brown-adipose-tissue-and-tspo-via-combination-of-disulfiram-and-64-cucl2
#3
Jing Yang, Jian Yang, Lu Wang, Anna Moore, Steven H Liang, Chongzhao Ran
PET imaging is a widely applicable but a very expensive technology. On-site synthesis is one important contributor to the high cost. In this report, we demonstrated the feasibility of a synthesis-free method for PET imaging of brown adipose tissue (BAT) and translocator protein 18 kDa (TSPO) via a combination of disulfiram, an FDA approved drug for alcoholism, and (64)CuCl2 (termed (64)Cu-Dis). In this method, a step-wise injection protocol of (64)CuCl2 and disulfiram was used to accomplish the purpose of synthesis-free...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811612/coenzyme-q10-improves-lipid-metabolism-and-ameliorates-obesity-by-regulating-camkii-mediated-pde4-inhibition
#4
Zhe Xu, Jia Huo, Xin Ding, Mu Yang, Lin Li, Jian Dai, Kazunori Hosoe, Hiroshi Kubo, Masayuki Mori, Keiichi Higuchi, Jinko Sawashita
Our recent studies revealed that supplementation with the reduced form of coenzyme Q10 (CoQ10H2) inhibits oxidative stress and slows the process of aging in senescence-accelerated mice. CoQ10H2 inhibits adipocyte differentiation and regulates lipid metabolism. In the present study, we show that dietary supplementation with CoQ10H2 significantly reduced white adipose tissue content and improved the function of brown adipose tissue by regulating expression of lipid metabolism-related factors in KKAy mice, a model of obesity and type 2 diabetes...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811495/low-protein-induced-increases-in-fgf21-drive-ucp1-dependent-metabolic-but-not-thermoregulatory-endpoints
#5
Cristal M Hill, Thomas Laeger, Diana C Albarado, David H McDougal, Hans-Rudolf Berthoud, Heike Münzberg, Christopher D Morrison
Dietary protein restriction increases adipose tissue uncoupling protein 1 (UCP1), energy expenditure and food intake, and these effects require the metabolic hormone fibroblast growth factor 21 (FGF21). Here we test whether the induction of energy expenditure during protein restriction requires UCP1, promotes a resistance to cold stress, and is dependent on the concomitant hyperphagia. Wildtype, Ucp1-KO and Fgf21-KO mice were placed on control and low protein (LP) diets to assess changes in energy expenditure, food intake and other metabolic endpoints...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28809783/role-of-omentin-vaspin-cardiotrophin-1-tweak-and-nov-ccn3-in-obesity-and-diabetes-development
#6
REVIEW
Xavier Escoté, Saioa Gómez-Zorita, Miguel López-Yoldi, Iñaki Milton-Laskibar, Alfredo Fernández-Quintela, J Alfredo Martínez, María J Moreno-Aliaga, María P Portillo
Adipose tissue releases bioactive mediators called adipokines. This review focuses on the effects of omentin, vaspin, cardiotrophin-1, Tumor necrosis factor-like Weak Inducer of Apoptosis (TWEAK) and nephroblastoma overexpressed (NOV/CCN3) on obesity and diabetes. Omentin is produced by the stromal-vascular fraction of visceral adipose tissue. Obesity reduces omentin serum concentrations and adipose tissue secretion in adults and adolescents. This adipokine regulates insulin sensitivity, but its clinical relevance has to be confirmed...
August 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28807877/cryptotanshinone-promotes-commitment-to-the-brown-adipocyte-lineage-and-mitochondrial-biogenesis-in-c3h10t1-2-mesenchymal-stem-cells-via-ampk-and-p38-mapk-signaling
#7
Khan Mohammad Imran, Naimur Rahman, Dahyeon Yoon, Miso Jeon, Byong-Taek Lee, Yong-Sik Kim
Although white adipose tissue (WAT) stores triglycerides and contributes to obesity, brown adipose tissue (BAT) dissipates energy as heat. Therefore, browning of WAT is regarded as an attractive way to counteract obesity. Our previous studies have revealed that treatment with cryptotanshinone (CT) during adipogenesis of 3T3-L1 cells inhibits their differentiation. Here, we found that pretreatment of C3H10T1/2 mesenchymal stem cells with CT before exposure to adipogenic hormonal stimuli promotes the commitment of these mesenchymal stem cells to the adipocyte lineage as confirmed by increased triglyceride accumulation...
August 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28805979/effects-of-mtor-inhibition-on-cardiac-and-adipose-tissue-pathology-and-glucose-metabolism-in-rats-with-metabolic-syndrome
#8
Ayako Uchinaka, Mamoru Yoneda, Yuichiro Yamada, Toyoaki Murohara, Kohzo Nagata
The mammalian target of rapamycin (mTOR) is a regulator of metabolism and is implicated in pathological conditions such as obesity and diabetes. We aimed to investigate the role of mTOR in obesity. A new animal model of metabolic syndrome (MetS), named DahlS.Z-Lepr(fa) /Lepr(fa) (DS/obese) rats was established previously in our laboratory. In this study, we used this model to evaluate the effects of mTOR inhibition on cardiac and adipose tissue pathology and glucose metabolism. DS/obese rats were treated with the mTOR inhibitor, everolimus, (0...
August 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28805896/the-composition-of-dietary-fat-alters-the-transcriptional-profile-of-pathways-associated-with-lipid-metabolism-in-the-liver-and-adipose-tissue-in-the-pig
#9
T A Kellner, N K Gabler, J F Patience
The objective was to investigate the of effect chemical composition of dietary fat on transcription of genes involved in lipid metabolism in adipose tissue and the liver via transcriptional profiling in growing pigs. A total of 48 Genetiporc 6.0 × Genetiporc F25 (PIC, Inc., Hendersonville, TN) barrows (initial BW of 44.1 ± 1.2 kg) were randomly allotted to 1 of 6 dietary treatments. Each experimental diet included 95% of a corn-soybean meal basal diet and 5% cornstarch (control; CNTR), animal-vegetable blend (AV), coconut oil (COCO), corn oil (COIL), fish oil (FO), or tallow (TAL)...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28803538/pharmacokinetics-of-tafamidis-a-transthyretin-amyloidosis-drug-in-rats
#10
Kyeong-Ryoon Lee, Jong-Woo Jeong, Hun-Chan Hyun, Jang Eunseo, Sunjoo Ahn Ahn, Sungwook Choi, Sang Hoon Joo, Sung-Sub Kim, Tae-Sung Koo
1. We characterized the pharmacokinetics of tafamidis, a novel drug to treat transthyretin-related amyloidosis, in rats after intravenous and oral administration at doses of 0.3-3 mg/kg. In vitro Caco-2 cell permeability and liver microsomal stability, as well as in vivo tissue distribution and plasma protein binding were also examined. 2. After intravenous injection, systemic clearance (CL), volumes of distribution at steady state (Vss), and half-life (T½) remained unaltered as a function of dose, with values in the ranges of 6...
August 14, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/28802563/metabolic-circuit-involving-free-fatty-acids-microrna-122-and-triglyceride-synthesis-in-liver-and-muscle-tissues
#11
Chofit Chai, Mila Rivkin, Liav Berkovits, Alina Simerzin, Elina Zorde-Khvalevsky, Nofar Rosenberg, Shiri Klein, Dayana Yaish, Ronen Durst, Shoshana Shpitzen, Shiran Udi, Joseph Tam, Joerg Heeren, Anna Worthmann, Christoph Schramm, Johannes Kluwe, Revital Ravid, Eran Hornstein, Hilla Giladi, Eithan Galun
BACKGROUND & AIMS: Effective treatments are needed for hepatic steatosis characterized by accumulation of triglycerides in hepatocytes, which leads to hepatocellular carcinoma. MicroRNA 122 (MIR122) is expressed only in the liver, where it regulates lipid metabolism. We investigated the mechanism by which free fatty acids (FFAs) regulate MIR122 expression and the effect of MIR122 on triglyceride synthesis. METHODS: We analyzed MIR122 promoter activity and validated its target mRNAs by transfection of luciferase reporter plasmids into Huh7, BNL-1ME, and HEK293 cultured cell lines...
August 9, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28801960/mri-characterization-of-brown-adipose-tissue-under-thermal-challenges-in-normal-weight-overweight-and-obese-young-men
#12
Jie Deng, Lisa M Neff, Nicholas C Rubert, Bin Zhang, Richard M Shore, Jonathan D Samet, Paige C Nelson, Lewis Landsberg
PURPOSE: To implement quantitative Dixon magnetic resonance imaging (MRI) methods for brown adipose tissue (BAT) characterization at inactive and cold-activated states in normal weight, overweight, and obese subjects. The hypotheses are that MRI characteristics of BAT would differentiate between nonobese and obese subjects, and activation of BAT in response to thermal challenges that are detected by MRI would be correlated with BAT activity measured by positron emission tomography / computed tomography (PET/CT)...
August 11, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28801262/the-physiological-and-pathophysiological-roles-of-taurine-in-adipose-tissue-in-relation-to-obesity
#13
REVIEW
Shigeru Murakami
Obesity is caused by an imbalance between energy intake and energy expenditure. It is established that obesity is a state of low-grade chronic inflammation, which is characterized by enlarged hypertrophied adipocytes, increased infiltration by macrophages and marked changes in the secretion of adipokines and free fatty acids. The effects of taurine on the pathogenesis of obesity have been reported in animals and humans. Although the mechanisms underlying the anti-obesity action of taurine remain to be defined, taurine seems to ameliorate obesity through stimulation of energy expenditure, modulation of lipid metabolism, anorexic effect, anti-inflammatory and anti-oxidative effects...
August 8, 2017: Life Sciences
https://www.readbyqxmd.com/read/28801239/salsalate-activates-skeletal-muscle-thermogenesis-and-protects-mice-from-high-fat-diet-induced-metabolic-dysfunction
#14
Li Nie, Xin-Lu Yuan, Ke-Tao Jiang, Yu-Hui Jiang, Jin Yuan, Lan Luo, Shi-Wei Cui, Cheng Sun
Salsalate plays beneficial roles for ameliorating hyperglycemia and dyslipidemia in type 2 diabetes patients, but the underlying mechanisms are still poorly understood. In this study, by administering salsalate to mice fed with high fat diet and examining how salsalate rectifies metabolic dysfunction in these obese mice, we found that salsalate stimulated body temperature and attenuated body weight gain without affecting food intake. Our results showed that salsalate application decreased lipid accumulation in liver and epididymal white adipose tissue (eWAT), inhibited hepatic gluconeogenesis and improved insulin signaling transduction in eWAT...
August 4, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28800407/human-brown-adipose-tissue-function-and-therapeutic-potential-in-metabolic-disease
#15
REVIEW
Padmanabh Shrikant Bhatt, Waljit S Dhillo, Victoria Salem
There has been a resurgence of interest in brown adipose tissue (BAT) over the last decade. Key to this has been our ability to accurately image it, which has improved significantly. The role of BAT in regulating energy expenditure is important, and its pharmacological manipulation may hold therapeutic potential in metabolic disease. There is ample evidence of BAT activation by cold exposure, and pharmacological utilisation of similar pathways, using B3 receptor agonists holds promise since the development of selective agonists with limited cross-reactivity has rekindled interest...
August 8, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28799895/arginine-and-aerobic-training-prevent-endothelial-and-metabolic-alterations-in-rats-at-high-risk-for-the-development-of-the-metabolic-syndrome
#16
Renata F Medeiros, Thaiane G Gaique, Thais Bento-Bernardes, Raquel Kindlovits, Tamiris M B Gomes, Nadia Alice V Motta, Fernanda Carla Brito, Caroline Fernandes-Santos, Karen J Oliveira, Antonio Claudio L Nóbrega
Endothelial function is a key mechanism in the development of CVD. Arginine and exercise are important non-pharmacological strategies for mitigating the impact of metabolic changes in the metabolic syndrome, but the effect of their combined administration is unknown. Thus, the aim of this study was to investigate the isolated and combined effects of aerobic training and arginine supplementation on metabolic variables and vascular reactivity in rats at high risk for developing the metabolic syndrome. Wistar rats were divided into two groups: control and fructose (F - water with 10 % fructose)...
July 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28799667/coadministration-of-isomalto-oligosaccharides-augments-metabolic-health-benefits-of-cinnamaldehyde-in-high-fat-diet-fed-mice
#17
Dhirendra Pratap Singh, Pragyanshu Khare, Vandana Bijalwan, Ritesh Kumar Baboota, Jagdeep Singh, Kanthi Kiran Kondepudi, Kanwaljit Chopra, Mahendra Bishnoi
Bacteriostatic properties of a potential anti-obesity agent cinnamaldehyde (CMN) may present untoward effects on the resident gut microbiota. Here, we evaluated whether the combination of Isomalto-oligosaccharides (IMOs) with CMN prevents unwanted effects of CMN on gut microbiota and associated metabolic outcomes in HFD-fed mice. Male Swiss albino mice divided into four groups (n = 10), were fed on normal chow, or HFD (58% fat kcal), HFD + CMN (10 mg kg(-1) ) and HFD + CMN (10 mg kg(-1) ) + IMOs (1 g kg(-1) ) for 12 weeks...
August 11, 2017: BioFactors
https://www.readbyqxmd.com/read/28799554/adapting-to-obesity-with-adipose-tissue-inflammation
#18
REVIEW
Shannon M Reilly, Alan R Saltiel
Adipose tissue not only has an important role in the storage of excess nutrients but also senses nutrient status and regulates energy mobilization. An overall positive energy balance is associated with overnutrition and leads to excessive accumulation of fat in adipocytes. These cells respond by initiating an inflammatory response that, although maladaptive in the long run, might initially be a physiological response to the stresses obesity places on adipose tissue. In this Review, we characterize adipose tissue inflammation and review the current knowledge of what triggers obesity-associated inflammation in adipose tissue...
August 11, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28798409/using-blubber-explants-to-investigate-adipose-function-in-grey-seals-glycolytic-lipolytic-and-gene-expression-responses-to-glucose-and-hydrocortisone
#19
Kimberley A Bennett, Kelly J Robinson, Simon E W Moss, Sebastian Millward, Ailsa J Hall
Adipose tissue is fundamental to energy balance, which underpins fitness and survival. Knowledge of adipose regulation in animals that undergo rapid fat deposition and mobilisation aids understanding of their energetic responses to rapid environmental change. Tissue explants can be used to investigate adipose regulation in wildlife species with large fat reserves, when opportunities for organismal experimental work are limited. We investigated glucose removal, lactate, glycerol and NEFA accumulation in media, and metabolic gene expression in blubber explants from wild grey seals...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798202/aerobic-exercise-elevates-markers-of-angiogenesis-and-macrophage-il6-gene-expression-in-the-subcutaneous-adipose-tissue-of-overweight-to-obese-adults
#20
Douglas W Van Pelt, Lisa M Guth, Jeffrey F Horowitz
Alterations in the inflammatory state, metabolic function, and structure of subcutaneous adipose tissue (SAT) can impact the development of insulin resistance in obesity. Exercise can improve metabolic health in obesity, but the effects of exercise on SAT are not well known. The purpose of this study was to examine the effects of acute exercise and habitual exercise training on mRNA expression of markers of lipid metabolism, inflammation, fibrosis, and hypoxia/angiogenesis in SAT, as well as adipocyte cell size...
August 10, 2017: Journal of Applied Physiology
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