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https://www.readbyqxmd.com/read/28641050/thrifty-females-frisky-males-winter-energetics-of-hibernating-bats-from-a-cold-climate
#1
Zenon J Czenze, Kristin A Jonasson, Craig K R Willis
Mammalian hibernation consists of energy-saving torpor bouts (periods of controlled reduction in body temperature [Tb]) interspersed with brief arousals to normothermic Tb. Frequency and duration of torpor bouts and arousals can affect winter survival and are thought to be influenced by an optimization balancing the energetic benefits of prolonged torpor against the physiological and ecological costs (e.g., accumulation of metabolic wastes). Female little brown bats (Myotis lucifugus) spend their fat reserves more slowly than males during winter, presumably so they can emerge from hibernation in good condition to initiate pregnancy...
July 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28637651/pivotal-role-of-o-glcnac-modification-in-cold-induced-thermogenesis-by-brown-adipose-tissue-through-mitochondrial-biogenesis
#2
Natsuko Ohashi, Katsutaro Morino, Shogo Ida, Osamu Sekine, Mengistu Lemecha, Shinji Kume, Shi-Young Park, Cheol Soo Choi, Satoshi Ugi, Hiroshi Maegawa
Adipose tissues considerably influence metabolic homeostasis, and both white (WAT) and brown adipose tissue (BAT) play significant roles in lipid and glucose metabolism. O-GlcNAc modification is characterized by the addition of N-acetylglucosamine to various proteins by O-GlcNAc transferase (Ogt), subsequently modulating various cellular processes. However, little is known about the role of O-GlcNAc modification in adipose tissues. Here, we report the critical role of O-GlcNAc modification in cold-induced thermogenesis...
June 21, 2017: Diabetes
https://www.readbyqxmd.com/read/28632997/epidemiology-of-obesity-and-pharmacologic-treatment-options
#3
Vignesh Shettar, Sarang Patel, Srividya Kidambi
Prevalence of obesity and its related morbidity have increased to alarming levels in adults and children in the United States and globally. Weight loss results in improvement of much of the obesity-related morbidity. Lifestyle changes such as dietary modifications, increased physical activity, and behavioral therapy form the crux of weight management. However, many individuals need additional assistance (pharmacologic or surgical) to initiate or sustain weight loss. Pharmacologic therapy consists of a number of agents that work by decreasing appetite, gastric emptying, or nutrient absorption or by increasing satiety...
June 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28631590/comparative-evaluation-of-veriflow-%C3%A2-salmonella-species-to-usda-and-fda-culture-based-methods-for-the-detection-of-salmonella-spp-in-food-and-environmental-samples
#4
Amrita Puri, Adam C Joelsson, Shawn P Terkhorn, Ashley S Brown, Zara E Gaudioso, Nicholas A Siciliano
Veriflow(®)Salmonella species (Veriflow SS)is a molecular-based assay for the presumptive detection of Salmonella spp. from environmental surfaces (stainless steel, sealed concrete, plastic, and ceramic tile), dairy (2% milk), raw meat (20% fat ground beef), chicken carcasses, and ready-to-eat (RTE) food (hot dogs). The assay utilizes a PCR detection method coupled with a rapid, visual, flow-based assay that develops in 3 min post-PCR amplification and requires only an 18 h enrichment for maximum sensitivity...
June 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28630339/ucp1-deficiency-causes-brown-fat-respiratory-chain-depletion-and-sensitizes-mitochondria-to-calcium-overload-induced-dysfunction
#5
Lawrence Kazak, Edward T Chouchani, Irina G Stavrovskaya, Gina Z Lu, Mark P Jedrychowski, Daniel F Egan, Manju Kumari, Xingxing Kong, Brian K Erickson, John Szpyt, Evan D Rosen, Michael P Murphy, Bruce S Kristal, Steven P Gygi, Bruce M Spiegelman
Brown adipose tissue (BAT) mitochondria exhibit high oxidative capacity and abundant expression of both electron transport chain components and uncoupling protein 1 (UCP1). UCP1 dissipates the mitochondrial proton motive force (Δp) generated by the respiratory chain and increases thermogenesis. Here we find that in mice genetically lacking UCP1, cold-induced activation of metabolism triggers innate immune signaling and markers of cell death in BAT. Moreover, global proteomic analysis reveals that this cascade induced by UCP1 deletion is associated with a dramatic reduction in electron transport chain abundance...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629569/in-depth-analysis-of-interreader-agreement-and-accuracy-in-categorical-assessment-of-brown-adipose-tissue-in-18-fdg-pet-ct
#6
Anton S Becker, Caroline Zellweger, Khoschy Schawkat, Sanja Bogdanovic, Valerie Doan Phi van, Hannes W Nagel, Christian Wolfrum, Irene A Burger
PURPOSE: To evaluate the interreader agreement of a three-tier craniocaudal grading system for brown fat activation and investigate the accuracy of the distinction between the three grades. MATERIALS AND METHODS: After IRB approval, 340 cases were retrospectively selected from patients undergoing (18)FDG-PET/CT between 2007 and 2015 at our institution, with 85 cases in each grade and 85 controls with no active brown fat. Three readers evaluated all cases independently...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28626403/a-twenty-four-year-old-woman-with-left-flank-lipoma-like-hibernoma
#7
R E Shackelford, M Al Shaarani, J Ansari, E Wei, J Cotelingam
A 24-year-old woman presented with a 5-month history of a left flank mass that was painful on palpation. Magnetic resonance imaging revealed a 10.0 × 6.0 × 2.5 cm mass consistent with lipoma. A fatty lobulated mass was excised and subjected to H&E staining and immunohistochemical analyses. The specimen consisted of mature univacuolated adipocytic cells, with intermixed multivacuolated eosinophilic granular cells. No atypia or hyperchromasia was identified. Most of the cells were S100 positive and Ki-67 immunonegative...
May 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28626215/genetic-variation-in-the-obesity-gene-fto-is-not-associated-with-decreased-fat-oxidation-the-neo-study
#8
L L Blauw, R Noordam, S Trompet, J F P Berbée, F R Rosendaal, D van Heemst, K W van Dijk, D O Mook-Kanamori, R de Mutsert, P C N Rensen
BACKGROUND: The FTO gene harbours the strongest common genetic variant associated with obesity. Recently, rs1421085-T to -C substitution mapped in FTO was shown to induce a developmental shift of human adipocytes from an energy-combusting beige to an energy-storing white phenotype in vitro. As browning of adipocytes selectively enhances fat oxidation (FatOx), we hypothesized that rs1421085-C in FTO is associated with deceased FatOx compared with carbohydrate oxidation (CarbOx) and an increased respiratory quotient (RQ)...
June 19, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28624714/patient-reported-outcomes-of-autologous-fat-grafting-after-breast-cancer-surgery
#9
A W W Brown, M Kabir, K A Sherman, F Meybodi, J R French, E B Elder
INTRODUCTION: Autologous fat grafting (AFG) can be used as an adjunct in breast cancer surgery to improve contour defects. Few previous studies have assessed patient reported outcomes (PROs) for AFG. This study analysed AFG use and assessed PROs in terms of physical and psychosocial well-being. MATERIALS AND METHODS: All patients undergoing AFG were identified from a prospective database and asked to complete the validated BREAST-Q questionnaire and a tool to assess patient-perceived change after AFG (5-point Likert-type scale)...
June 15, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/28620480/reduction-of-hba1c-levels-by-fucoxanthin-enriched-akamoku-oil-possibly-involves-the-thrifty-allele-of-uncoupling-protein-1-ucp1-a-randomised-controlled-trial-in-normal-weight-and-obese-japanese-adults
#10
Nana Mikami, Masashi Hosokawa, Kazuo Miyashita, Hitoshi Sohma, Yoichi M Ito, Yasuo Kokai
Lifestyle-related problems are becoming a major health threat in East Asian countries. Therefore, finding an efficacious nutraceutical for this population is important. One candidate is fucoxanthin (Fx), a carotenoid abundantly found in edible brown seaweed that has been associated with a number of valuable health-promoting benefits. Unfortunately, clinical studies of Fx are limited. In the present study, we aimed to evaluate the effects of Fx on obesity-related parameters in Japanese subjects harbouring an SNP associated with lifestyle-related problems...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/28620356/quantifying-biochemical-alterations-in-brown-and-subcutaneous-white-adipose-tissues-of-mice-using-fourier-transform-infrared-widefield-imaging
#11
Ebrahim Aboualizadeh, Owen T Carmichael, Ping He, Diana C Albarado, Christopher D Morrison, Carol J Hirschmugl
Stimulating increased thermogenic activity in adipose tissue is an important biological target for obesity treatment, and label-free imaging techniques with the potential to quantify stimulation-associated biochemical changes to the adipose tissue are highly sought after. In this study, we used spatially resolved Fourier transform infrared (FTIR) imaging to quantify biochemical changes caused by cold exposure in the brown and subcutaneous white adipose tissues (BAT and s-WAT) of 6 week-old C57BL6 mice exposed to 30°C (N = 5), 24°C (N = 5), and 10°C (N = 5) conditions for 10 days...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28619307/pilot-randomized-controlled-trial-of-a-mindfulness-based-group-intervention-in-adolescent-girls-at-risk-for-type-2-diabetes-with-depressive-symptoms
#12
Lauren B Shomaker, Stephanie Bruggink, Bernadette Pivarunas, Amanda Skoranski, Jillian Foss, Ella Chaffin, Stephanie Dalager, Shelly Annameier, Jordan Quaglia, Kirk Warren Brown, Patricia Broderick, Christopher Bell
OBJECTIVE: (1) Evaluate feasibility and acceptability of a mindfulness-based group in adolescent girls at-risk for type 2 diabetes (T2D) with depressive symptoms, and (2) compare efficacy of a mindfulness-based versus cognitive-behavioral group for decreasing depressive symptoms and improving insulin resistance. DESIGN AND SETTING: Parallel-group, randomized controlled pilot trial conducted at a university. PARTICIPANTS: Thirty-three girls 12-17y with overweight/obesity, family history of diabetes, and elevated depressive symptoms were randomized to a six-week mindfulness-based (n=17) or cognitive-behavioral program (n=16)...
June 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28614774/new-insight-into-the-direct-anti-inflammatory-activity-of-a-myokine-irisin-against-proinflammatory-activation-of-adipocytes-implication-for-exercise-in-obesity
#13
A I Mazur-Bialy, J Bilski, E Pochec, T Brzozowski
A biological activity of myokine irisin, has been intensively investigated in the context of a browning process occurring in white adipose tissue, but its role as a modulator of immune response has been little studied. The aim of our study was to determine the impact of irisin (0 - 100 nM) on pro-inflammatory activation of adipocyte 3T3 L1 cell line. Irisin reduced in a concentration-dependent manner the expression and activity of major proinflammatory cytokines, e.g. tumor necrosis factor-alpha (TNF-α) and interleukin 6 (IL-6) expression and their secretion into cell medium...
April 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28614714/dectin-1-activation-exacerbates-obesity-and-insulin-resistance-in-the-absence-of-myd88
#14
Angela Castoldi, Vinicius Andrade-Oliveira, Cristhiane Favero Aguiar, Mariane Tami Amano, Jennifer Lee, Marcelli Terumi Miyagi, Marcela Teatin Latância, Tarcio Teodoro Braga, Marina Burgos da Silva, Aline Ignácio, Joanna Darck Carola Correia Lima, Flavio V Loures, José Antonio T Albuquerque, Marina Barguil Macêdo, Rafael Ribeiro Almeida, Jonas W Gaiarsa, Luis A Luévano-Martínez, Thiago Belchior, Meire Ioshie Hiyane, Gordon D Brown, Marcelo A Mori, Christian Hoffmann, Marília Seelaender, Willian T Festuccia, Pedro Manoel Moraes-Vieira, Niels Olsen Saraiva Câmara
The underlying mechanism by which MyD88 regulates the development of obesity, metainflammation, and insulin resistance (IR) remains unknown. Global deletion of MyD88 in high-fat diet (HFD)-fed mice resulted in increased weight gain, impaired glucose homeostasis, elevated Dectin-1 expression in adipose tissue (AT), and proinflammatory CD11c+ AT macrophages (ATMs). Dectin-1 KO mice were protected from diet-induced obesity (DIO) and IR and had reduced CD11c+ AT macrophages. Dectin-1 antagonist improved glucose homeostasis and decreased CD11c+ AT macrophages in chow- and HFD-fed MyD88 KO mice...
June 13, 2017: Cell Reports
https://www.readbyqxmd.com/read/28612196/cell-source-differentiation-functional-stimulation-and-potential-application-of-human-thermogenic-adipocytes-in-vitro
#15
REVIEW
Dinh-Toi Chu, Yang Tao, Le Hoang Son, Duc-Hau Le
Recent investigations have showed that the functional thermogenic adipocytes are present in both infants and adult humans. Accumulating evidence suggests that the coexistence of classical and inducible brown (brite) adipocytes in humans at adulthood and these adipocytes function to generate heat from energy resulting in reducing body fat and improving glucose metabolism. Human thermogenic adipocytes can be differentiated in vitro from stem cells, cell lines, or adipose stromal vascular fraction. Pre-activated human brite adipocytes in vitro can maintain their thermogenic function in normal or obese immunodeficient mice; therefore, they improve glucose homeostasis and reduce fat mass in obese animals...
June 14, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28609290/functional-imaging-of-brown-adipose-tissue-in-human
#16
REVIEW
Hamza El Hadi, Roberto Vettor, Marco Rossato
Obesity has become a major public health challenge and an increasing trend is seen in its prevalence worldwide. It is a complex disorder involving an excessive amount of body fat as a result of an energy imbalance leading to caloric overload. Since the discovery of functional brown adipose tissue (BAT) in adult humans, with energy dissipating properties, this thermogenic tissue has thus emerged as an attractive therapeutic target to combat obesity and related cardiometabolic disorders. The advancements in imaging modalities to evaluate organ-specific metabolism in humans is substantially contributing to understand the physiological role of BAT...
June 13, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28601097/college-students-health-behavior-clusters-differences-by-sex
#17
Sarah Colby, Wenjun Zhou, Morgan F Sowers, Karla Shelnutt, Melissa D Olfert, Jesse Morrell, Mallory Koenings, Tandalayo Kidd, Tanya M Horacek, Geoffrey W Greene, Onikia Brown, Adrienne A White, Sharon L Hoerr, Carol Byrd-Bredbenner, Kendra K Kattelmann
OBJECTIVE: The study purpose was to identify clusters of weight-related behaviors by sex in a college student populations. METHODS: We conducted secondary data analysis from online surveys and physical assessments collected in Project Young Adults Eating and Active for Health (YEAH) with a convenience sample of students on 13 college campuses in the United States. We performed 2-step cluster analysis by sex to identify subgroups with homogeneous characteristics and behaviors...
July 1, 2017: American Journal of Health Behavior
https://www.readbyqxmd.com/read/28597936/the-beneficial-metabolic-effects-of-insulin-sensitizers-are-not-attenuated-by-mitochondrial-pyruvate-carrier-2-hypomorphism
#18
Patrick A Vigueira, Kyle S McCommis, Wesley T Hodges, George G Schweitzer, Serena L Cole, Lalita Oonthonpan, Eric B Taylor, William G McDonald, Rolf F Kletzien, Jerry R Colca, Brian N Finck
Rosiglitazone and pioglitazone are thiazolidinedione (TZD) compounds that have been used clinically as insulin-sensitizing drugs and are generally believed to mediate their effects via activation of the peroxisome proliferator-activated receptor γ (PPARγ). Recent work has shown that it is possible to synthesize TZD compounds with potent insulin-sensitizing effects and markedly-diminished affinity for PPARγ. Both clinically-used TZDs and investigational PPARγ-sparing TZDs, such as MSDC-0602, interact with the mitochondrial pyruvate carrier (MPC) and inhibit its activity...
June 9, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28596551/automated-segmentation-of-human-cervical-supraclavicular-adipose-tissue-in-magnetic-resonance-images
#19
Elin Lundström, Robin Strand, Anders Forslund, Peter Bergsten, Daniel Weghuber, Håkan Ahlström, Joel Kullberg
Human brown adipose tissue (BAT), with a major site in the cervical-supraclavicular depot, is a promising anti-obesity target. This work presents an automated method for segmenting cervical-supraclavicular adipose tissue for enabling time-efficient and objective measurements in large cohort research studies of BAT. Fat fraction (FF) and R2(*) maps were reconstructed from water-fat magnetic resonance imaging (MRI) of 25 subjects. A multi-atlas approach, based on atlases from nine subjects, was chosen as automated segmentation strategy...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28594316/effects-of-irisin-and-exercise-on-metabolic-parameters-and-reproductive-hormone-levels-in-high-fat-diet-induced-obese-female-mice
#20
Ercan Bastu, Umit Zeybek, Ebru Gurel Gurevin, Bahar Yüksel Ozgor, Faruk Celik, Nazli Okumus, Irem Demiral, Ozlem Dural, Cem Celik, Huri Bulut, Elif Ilkay Armutak, Bulent Baysal, Faruk Buyru, John Yeh
It has been documented that exogenously administered irisin (10(10) fibronectin-type III domain-containing 5 [FNDC5]), which is a new polypeptide hormone, induces the browning of subcutaneous fat and thermogenesis. In this study, effects of physical activity and exogenous administration of irisin were investigated on parameters related with reproduction and metabolism in the high-fat diet-induced obesity model of the female C57BL/6J mice. Sixty mice were gathered at age approximately 5 to 6weeks and were divided into 3 groups...
January 1, 2017: Reproductive Sciences
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