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https://www.readbyqxmd.com/read/28324157/water-fat-mri-in-a-hibernator-reveals-seasonal-growth-of-white-and-brown-adipose-tissue-without-cold-exposure
#1
Amanda MacCannell, Kevin Sinclair, Lannette Friesen-Waldner, Charles A McKenzie, James F Staples
Obligate hibernators, such as ground squirrels, display circannual patterns which persist even under constant laboratory conditions, suggesting that they are regulated by endogenous rhythms. Brown adipose tissue (BAT) is important for thermogenesis during periodic arousals from hibernation when core body temperature rises spontaneously from 5 to 37 °C. In most small eutherians BAT growth requires several weeks of cold exposure. We hypothesized that in the thirteen-lined ground squirrel (Ictidomys tridecemlineatus), a hibernator, BAT growth is regulated, in part, by an endogenous rhythm and we predicted that this growth would precede the hibernation season without cold exposure...
March 21, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28324021/endogenous-calcitonin-gene-related-peptide-regulates-lipid-metabolism-and-energy-homeostasis-in-male-mice
#2
Tian Liu, Akiko Kamiyoshi, Takayuki Sakurai, Yuka Ichikawa-Shindo, Hisaka Kawate, Lei Yang, Megumu Tanaka, Xian Xian, Akira Imai, Liuyu Zhai, Kazutaka Hirabayashi, Kun Dai, Keiya Tanimura, Teng Liu, Nanqi Cui, Kyoko Igarashi, Akihiro Yamauchi, Takayuki Shindo
Calcitonin gene-related peptide (CGRP) is a bioactive peptide produced by alternative splicing of the primary transcript of the calcitonin/CGRP gene. CGRP is largely distributed in the cardiovascular and nervous systems, where it acts as a regulatory factor. CGRP is also expressed in organs and tissues involved in metabolic regulation, including white adipose tissue (WAT), where its function is largely unknown. In this study, we examined the effects of endogenous CGRP on metabolic function. When we administered a high-fat diet to CGRP knockout (CGRP-/-) and wild-type (WT) mice for 10 weeks, we observed that food intake did not differ between the two groups, but body weight and visceral fat weight were significantly lower in CGRP-/- mice...
January 20, 2017: Endocrinology
https://www.readbyqxmd.com/read/28324004/bone-turnover-is-suppressed-in-insulin-resistance-independent-of-adiposity
#3
K T Tonks, C P White, J R Center, D Samocha-Bonet, J R Greenfield
Context: The contribution of insulin resistance vs. adiposity to bone mineral density (BMD), bone turnover and fractures in humans remains unclear. Objective: Evaluate BMD and bone turnover markers (BTM) in lean (n=18) and overweight/obese individuals with (n=17) and without type 2 diabetes (n=34, deemed insulin-sensitive [Obsensitive, n=15] or insulin-resistant [Obresistant, n=19] by HOMA-IR). Design: Observational study. Outcome measures: Insulin sensitivity assessed by hyperinsulinemic-euglycemic clamp; whole body BMD and fat mass (FM) by DXA; and BTM (osteocalcin [OC], procollagen type-1 propeptide [P1NP] and collagen type-1 cross-linked C-telopeptide [CTx]) fasting and during clamp hyperinsulinemia...
January 23, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323935/association-of-in-vivo-adipose-tissue-cellular-kinetics-with-markers-of-metabolic-health-in-humans
#4
Ursula A White, Mark D Fitch, Robbie A Beyl, Marc K Hellerstein, Eric Ravussin
Context: Adipose tissue expansion occurs by hypertrophy and hyperplasia. Impaired hyperplasia, or adipogenesis, has been associated with obesity-related diseases. The cellular mechanisms underlying in vivo adipose cell turnover are not elucidated. Objective: We previously reported differences in in vivo cellular kinetics between the subcutaneous abdominal (scABD) and femoral (scFEM) depots using an 8-week incorporation of deuterium in women with obesity. We have now examined how in vivo kinetics correlate with markers of metabolic health...
March 2, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323929/human-brown-adipose-tissue-temperature-and-fat-fraction-are-related-to-its-metabolic-activity
#5
Kalle Koskensalo, Juho Raiko, Teemu Saari, Virva Saunavaara, Olli Eskola, Pirjo Nuutila, Jani Saunavaara, Riitta Parkkola, Kirsi A Virtanen
Background and aim: The metabolic activity of human brown adipose tissue (BAT) has been previously examined using positron-emission-tomography (PET). The aim of this study was to use proton Magnetic Resonance Spectroscopy (1H MRS) to investigate whether the temperature and the fat fraction (FF) of brown and white adipose tissue (WAT) are associated with BAT metabolic activity determined by 18F-FDG-PET. Materials and methods: Ten healthy subjects (4f/6m, 25-45 y) were studied using PET-MRI during acute cold exposure and at ambient room temperature...
February 21, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28320058/regional-differences-between-perisynovial-and-infrapatellar-adipose-tissue-depots-and-their-response-to-class-ii-and-iii-obesity-in-patients-with-oa
#6
Natalia S Harasymowicz, Nick D Clement, Asim Azfer, Richard Burnett, Donald M Salter, A Hamish W R Simpson
OBJECTIVE: Obesity is associated with an increased risk of developing Osteoarthritis (OA), which is postulated to be secondary to inflammation from adipose tissue (AT). There are peri-articular adipose depots in synovial joints, the association of this tissue with OA has not been extensively explored. The aim of this study was to investigate differences in local AT depots in knees with OA and changes related to class II and III obesity. METHODS: Synovium and the infrapatellar fat pad (IPFP) were collected during total knee replacement from 69 patients with end-stage OA...
March 20, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28319852/pterostilbene-a-dimethylated-analog-of-resveratrol-promotes-energy-metabolism-in-obese-rats
#7
Koji Nagao, Tomoyuki Jinnouchi, Shunichi Kai, Teruyoshi Yanagita
Pterostilbene (trans-3,5-dimethoxy-4-hydroxystilbene) is a dimethylated analog of resveratrol and has been reported to exert various pharmacological effects. In this study, we evaluated the effect of pterostilbene on the pathogenesis of obesity and energy metabolism in obese rats. Pterostilbene significantly activates silent mating type information regulation 2 homolog-1 and peroxisome proliferator-activated receptor-alpha in vitro. At 4 weeks a 0.5% pterostilbene diet markedly suppressed the abdominal white adipose tissue (WAT) accumulation in obese rats...
March 8, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28318578/relationships-between-body-condition-score-change-prior-mid-lactation-phenotypic-residual-feed-intake-and-hyperketonemia-onset-in-transition-dairy-cows
#8
Francesca M Rathbun, Ryan S Pralle, Sandra J Bertics, Louis E Armentano, K Cho, C Do, Kent A Weigel, Heather M White
Extensive efforts have been made to identify more feed-efficient dairy cows, yet it is unclear how selection for feed efficiency will influence metabolic health. The objectives of this research were to determine the relationships between residual feed intake (RFI), a measure of feed efficiency, body condition score (BCS) change, and hyperketonemia (HYK) incidence. Blood and milk samples were collected twice weekly from cows 5 to 18 d postcalving for a total of 4 samples. Hyperketonemia was diagnosed at a blood β-hydroxybutyrate (BHB) ≥1...
March 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28317122/an-anthropomorphic-abdominal-phantom-for-deformable-image-registration-accuracy-validation-in-adaptive-radiation-therapy
#9
Yuliang Liao, Linjing Wang, Xiangdong Xu, Haibin Chen, Jiawei Chen, Guoqian Zhang, Huaiyu Lei, Ruihao Wang, Shuxu Zhang, Xuejun Gu, Xin Zhen, Linghong Zhou
PURPOSE: To design and construct a three-dimensional (3D) anthropomorphic abdominal phantom for geometric accuracy and dose summation accuracy evaluations of deformable image registration (DIR) algorithms for adaptive radiation therapy (ART). METHOD: Organ molds, including liver, kidney, spleen, stomach, vertebra and two metastasis tumors, were 3D printed using contours from an ovarian cancer patient. The organ molds were molded with deformable gels made of different mixtures of polyvinyl chloride (PVC) and the softener dioctyl terephthalate...
March 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28314100/attenuated-mtor-signaling-and-enhanced-glucose-homeostasis-by-dietary-supplementation-with-lotus-seedpod-oligomeric-procyanidins-in-streptozotocin-stz-induced-diabetic-mice
#10
Xiaopeng Li, Yong Sui, Qian Wu, Bijun Xie, Zhida Sun
This study investigated the protective role of lotus seedpod oligomeric procyanidins (LSOPC) and synbiotics (Bifidobacterium Bb-12 and xylo-oligosaccharide) against high fat and streptozotocin (STZ)-induced diabetes. Administration of LSOPC or synbiotics have no effect on blood glucose in normal mice. Treatments with LSOPC for 12 weeks markedly reduced blood glucose, FFA, endotoxin, GHbA1c and improved glucose homeostasis, lipid metabolism and insulin level. In addition, administration of LSOPC significantly reversed the increase of mTOR and p66Shc in liver, skeletal muscle and white adipose tissue (WAT)...
March 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28303705/the-sense-of-life-satisfaction-versus-dietary-choices-of-young-women-doing-fitness-for-recreational-purposes
#11
Maria Gacek
Background: : The health potential of a person can be improved thanks to recreational physical activity and rational diet. The sense of life satisfaction is also one of significant health resources. Objective: The aim of the study was to analyze the relations between the level of life satisfaction and the frequency of consuming selected products in the group of young women who engage in fitness for recreational purposes. Material and Methods: The study involved 200 young women (20-30 years old) who regularly do recreational physical activity in fitness clubs in Małopolska...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28302705/brown-and-beige-adipose-tissues-phenotype-and-metabolic-potential-in-mice-and-men
#12
Kanta Chechi, Wouter David van Marken Lichtenbelt, Denis Richard
With the recent re-discovery of brown fat in adult humans, our outlook on adipose tissue biology has undergone a paradigm shift. While we attempt to identify, recruit and activate classic brown fat stores in humans, identification of beige/brite adipocytes has also raised the possibility of browning our white fat stores. Whether such transformation of human white fat depots can be achieved in order to enhance the whole-body oxidative potential remains to be seen. Evidence to-date, however, largely points towards a major oxidative role only for classic brown fat depots in rodents and in humans (e...
March 16, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28300329/insulin-resistance-and-the-igf-i-cortical-bone-relationship-in-children-ages-9-13-years
#13
Joseph M Kindler, Norman K Pollock, Emma M Laing, Assaf Oshri, Nathan T Jenkins, Carlos M Isales, Mark W Hamrick, Ke-Hong Ding, Dorothy B Hausman, George P McCabe, Berdine R Martin, Kathleen M Hill Gallant, Stuart J Warden, Connie M Weaver, Munro Peacock, Richard D Lewis
IGF-I is a pivotal hormone in pediatric musculoskeletal development. Though recent data suggest that the role of IGF-I in total body lean mass and total body bone mass accrual may be compromised in children with insulin resistance, cortical bone geometric outcomes have not been studied in this context. Therefore, we explored the influence of insulin resistance on the relationship between IGF-I and cortical bone in children. A secondary aim was to examine the influence of insulin resistance on the lean mass-dependent relationship between IGF-I and cortical bone...
March 16, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28296956/equifat-a-novel-scoring-system-for-the-semi-quantitative-evaluation-of-regional-adipose-tissues-in-equidae
#14
Philippa K Morrison, Patricia A Harris, Charlotte A Maltin, Dai Grove-White, Caroline McG Argo
Anatomically distinct adipose tissues represent variable risks to metabolic health in man and some other mammals. Quantitative-imaging of internal adipose depots is problematic in large animals and associations between regional adiposity and health are poorly understood. This study aimed to develop and test a semi-quantitative system (EQUIFAT) which could be applied to regional adipose tissues. Anatomically-defined, photographic images of adipose depots (omental, mesenteric, epicardial, rump) were collected from 38 animals immediately post-mortem...
2017: PloS One
https://www.readbyqxmd.com/read/28296401/effects-of-low-protein-diets-supplemented-with-branched-chain-amino-acids-on-lipid-metabolism-in-white-adipose-tissue-of-piglets
#15
Yinghui Li, Hongkui Wei, Fengna Li, Yehui Duan, Qiuping Guo, Yulong Yin
This study was to evaluate the effect of branched-chain amino acids (BCAA) supplementation in low-protein diets on lipid metabolism in dorsal subcutaneous adipose (DSA), abdominal subcutaneous adipose (ASA), and perirenal adipose (PRA) tissues. A total of 24 piglets were allotted to 4 treatments, and each group fed the adequate protein (AP) diet, low-protein (LP) diet, LP diet supplemented with BCAA (LP + B), or LP diet supplemented with twice BCAA (LP + 2B). Serum concentrations of leptin in the BCAA supplemented treatments were higher (P < 0...
March 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28294959/the-addition-of-liquid-fructose-to-a-western-type-diet-in-ldl-r-mice-induces-liver-inflammation-and-fibrogenesis-markers-without-disrupting-insulin-receptor-signalling-after-an-insulin-challenge
#16
Gemma Sangüesa, Miguel Baena, Natalia Hutter, José Carlos Montañés, Rosa María Sánchez, Núria Roglans, Juan Carlos Laguna, Marta Alegret
A high consumption of fat and simple sugars, especially fructose, has been related to the development of insulin resistance, but the mechanisms involved in the effects of these nutrients are not fully understood. This study investigates the effects of a Western-type diet and liquid fructose supplementation, alone and combined, on insulin signalling and inflammation in low-density lipoprotein (LDL) receptor-deficient mice (LDL-R(-/-)). LDL-R(-/-) mice were fed chow or Western diet ±15% fructose solution for 12 weeks...
March 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28291210/-long-association-tracts-of-the-human-white-matter-an-analysis-of-18-hemisphere-dissections-and-in-vivo-hardi-csd-tractography
#17
S A Goryainov, A V Kondrashov, M F Gol'dberg, A I Batalov, R A Sufianov, N E Zakharova, I N Pronin, D A Gol'bin, V Yu Zhukov, G F Dobrovol'sky, S Yu Shelyakin, V N Vorob'ev, S S Dadykin, A A Potapov
BACKGROUND: Anatomy of the conduction tracts of the cerebral cortex has been studied for a long time. Invention of diffusion tensor tractography renewed interest in this subject. The objectives of this work were to develop and improve protocols for dissection of the long association tracts of the human brain with studying the features of their segmentation, topography, and variability, compare the obtained data with the MR tractography data, and prepare for further clinical and anatomical studies...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28290325/assessing-the-effects-of-different-prebiotic-dietary-oligosaccharides-in-sheep-milk-ice-cream
#18
C F Balthazar, H L A Silva, A H Vieira, R P C Neto, L P Cappato, P T Coimbra, J Moraes, M M Andrade, V M A Calado, D Granato, M Q Freitas, M I B Tavares, R S L Raices, M C Silva, A G Cruz
The objective of this study was to assess the effects of different prebiotic dietary oligosaccharides (inulin, fructo-oligosaccharide, galacto-oligossacaride, short-chain fructo-oligosaccharide, resistant starch, corn dietary oligosaccharide and polydextrose) in non-fat sheep milk ice cream processing through physical parameters, water mobility and thermal analysis. Overall, the fat replacement by dietary prebiotic oligosaccharides significantly decreased the melting time, melting temperature and the fraction and relaxation time for fat and bound water (T22) while increased the white intensity and glass transition temperature...
January 2017: Food Research International
https://www.readbyqxmd.com/read/28288167/erythropoietin-epo-ameliorates-obesity-and-glucose-homeostasis-by-promoting-thermogenesis-and-endocrine-function-of-classical-brown-adipose-tissue-bat-in-diet-induced-obese-mice
#19
Kazuki Kodo, Satoru Sugimoto, Hisakazu Nakajima, Jun Mori, Ikuyo Itoh, Shota Fukuhara, Keiichi Shigehara, Taichiro Nishikawa, Kitaro Kosaka, Hajime Hosoi
Erythropoietin (EPO), clinically used as a hematopoietic drug, has received much attention due to its nonhematopoietic effects. EPO reportedly has beneficial effects on obesity and diabetes mellitus. We investigated whether interscapular brown adipose tissue (iBAT: main part of classical BAT) could play a role in EPO's anti-obesity and anti-diabetic effects in diet-induced obese mice. Four-week-old male C57BL/6J mice were fed a high-fat diet (HFD-Con), and half were additionally given an intraperitoneal injection of recombinant human EPO (200 IU/kg) (HFD-EPO) thrice a week for four weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28287631/negative-association-between-acrylamide-exposure-and-body-composition-in-adults-nhanes-2003-2004
#20
P-L Chu, L-Y Lin, P-C Chen, T-C Su, C-Y Lin
BACKGROUND/OBJECTIVES: Acrylamide is present in mainstream cigarette smoke and in some food prepared at high temperature. Animal studies have shown that acrylamide exposure reduces body weight. Prenatal exposure to acrylamide also has been linked to reduced birth weight in human. Whether acrylamide exposure is associated with altered body compositions in adults is not clear. SUBJECTS/METHODS: We selected 3623 subjects (aged ⩾20 years) from a National Health and Nutrition Examination Survey (NHANES) in 2003-2004 to determine the relationship among hemoglobin adducts of acrylamide (HbAA), hemoglobin adducts of glycidamide (HbGA) and body composition (body measures, bioelectrical impedance analysis (BIA), dual energy x-ray absorptiometry (DXA))...
March 13, 2017: Nutrition & Diabetes
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