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https://www.readbyqxmd.com/read/28448947/traveling-from-the-hypothalamus-to-the-adipose-tissue-the-thermogenic-pathway
#1
REVIEW
Cristina Contreras, Rubén Nogueiras, Carlos Diéguez, Kamal Rahmouni, Miguel López
Brown adipose tissue (BAT) is a specialized tissue critical for non-shivering thermogenesis producing heat through mitochondrial uncoupling; whereas white adipose tissue (WAT) is responsible of energy storage in the form of triglycerides. Another type of fat has been described, the beige adipose tissue; this tissue emerges in existing WAT depots but with thermogenic ability, a phenomenon known as browning. Several peripheral signals relaying information about energy status act in the brain, particularly the hypothalamus, to regulate thermogenesis in BAT and browning of WAT...
April 15, 2017: Redox Biology
https://www.readbyqxmd.com/read/28445518/use-of-human-fat-grafting-in-the-prevention-of-perineural-adherence-experimental-study-in-athymic-mouse
#2
Mario Cherubino, Igor Pellegatta, Alessandro Crosio, Luigi Valdatta, Stefano Geuna, Rosalba Gornati, Pierluigi Tos
Perineural adherences represent a problem after surgery involving peripheral neural system. Fat-grafting with adipose derived stem cells (ASCs) with their pro-regenerative characteristics can be important to prevent the neural damage or to facilitate the neural regeneration. Our idea was to use the fat-grafting as an anti-adherence device and test its efficacy on a postsurgical scar animal model and comparing to an antiadhesive gel. 32 athymic mice were operated under magnification, we exposed both sciatic nerves...
2017: PloS One
https://www.readbyqxmd.com/read/28442947/a-high-fat-diet-induces-a-loss-of-midbrain-dopaminergic-neuronal-function-that-underlies-motor-abnormalities
#3
Yunseon Jang, Min Joung Lee, Jeongsu Han, Soo Jeong Kim, Ilhwan Ryu, Xianshu Ju, Min Jeong Ryu, Woosuk Chung, Eungseok Oh, Gi Ryang Kweon, Jun Young Heo
Movement defects in obesity are associated with peripheral muscle defects, arthritis, and dysfunction of motor control by the brain. Although movement functionality is negatively correlated with obesity, the brain regions and downstream signaling pathways associated with movement defects in obesity are unclear. A dopaminergic neuronal pathway from the substantia nigra (SN) to the striatum is responsible for regulating grip strength and motor initiation through tyrosine hydroxylase (TH) activity-dependent dopamine release...
April 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28442780/the-effect-of-body-composition-and-serum-inflammatory-markers-on-the-functional-muscle-bone-unit-in-premenopausal-women
#4
S M Mueller, I Herter-Aeberli, A C Cepeda-Lopez, M Flück, H H Jung, M Toigo
BACKGROUND/OBJECTIVES: A number of recent studies dealing with the relationship between the effects of high body mass (BM) and fat mass (FM) on bone mass and strength exhibit a range of contrasting variations in their findings. These diverse findings have led to an ongoing controversy as to whether high BM and FM positively or negatively affect bone mass and strength. Excessive fat mass and the associated low-grade inflammation might overturn the higher mechanical stimulus arising from a higher body mass...
April 26, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28425848/the-contribution-of-bone-marrow-derived-cells-to-the-human-adipocyte-pool
#5
Peter Arner, Mikael Rydén
White adipose tissue is a remarkably expandable organ with results in the last decade showing that human white adipocytes are continuously turned over during the entire life-span. Data primarily in murine models have demonstrated that adipocytes are derived from precursors present mainly in the perivascular areas of adipose tissue but their precise origin remains unclear. Subsets of cells present in bone marrow display a multipotent differentiation capacity which has prompted the hypothesis that bone marrow-derived cells (BMDCs) may also contribute to the adipocyte pool present in peripheral fat depots...
March 15, 2017: Adipocyte
https://www.readbyqxmd.com/read/28424580/the-role-of-microrna-in-the-modulation-of-the-melanocortinergic-system
#6
REVIEW
Adel Derghal, Mehdi Djelloul, Jérôme Trouslard, Lourdes Mounien
The central control of energy balance involves a highly regulated neuronal network within the hypothalamus and the dorsal vagal complex. In these structures, pro-opiomelanocortin (POMC) neurons are known to reduce meal size and to increase energy expenditure. In addition, leptin, a peripheral signal that relays information regarding body fat content, modulates the activity of melanocortin pathway neurons including POMC-, Agouti-related peptide (AgRP)/Neuropeptide Y (NPY)-, melanocortin receptors (MC3R and MC4R)-expressing neurons...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28420713/acute-versus-chronic-exposure-to-high-fat-diet-leads-to-distinct-regulation-of-pka
#7
Edra London, Maria Nesterova, Constantine A Stratakis
The cAMP-dependent protein kinase (PKA) is an essential regulator of lipid and glucose metabolism that plays a critical role in energy homeostasis. The impact of diet on PKA signaling has not been defined, although perturbations in individual PKA subunits are associated with changes in adiposity, physical activity, and energy intake in mice and humans. We hypothesized that a high fat diet (HFD) would elicit peripheral and central alterations in the PKA system that would differ depending on length of exposure to HFD; these differences could protect against or promote diet-induced obesity (DIO)...
April 18, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28413961/incretins-and-lipid-metabolism
#8
Vasilis Tsimihodimos, Moses S Elisaf
Backgound: Recent findings indicate that incretin hormones and incretin-based therapies may affect the metabolism of lipoproteins, although the corresponding mechanisms are not clearly defined. OBJECTIVE: To summarize the available data on the mechanisms linking incretins with the characteristics of serum lipoproteins and discuss the clinical implications of these relationships. METHODS: PubMed was searched using the terms "incretins", "GLP-1", "GIP" and "lipids", "dyslipidemia", "triglycerides", "apolipoprotein B48"...
April 14, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28413320/panax-ginseng-meyer-prevents-radiation-induced-liver-injury-via-modulation-of-oxidative-stress-and-apoptosis
#9
Hyeong-Geug Kim, Seong-Soon Jang, Jin-Seok Lee, Hyo-Seon Kim, Chang-Gue Son
BACKGROUND: Radiotherapy is one of the most important modalities in cancer treatment; however, normal tissue damage is a serious concern. Drug development for the protection or reduction of normal tissue damage is therefore a clinical issue. Herein, we evaluated the protective properties of Panax ginseng Meyer and its corresponding mechanisms. METHODS: C56BL/6 mice were orally pretreated with P. ginseng water extract (PGE; 25 mg/kg, 50 mg/kg, or 100 mg/kg) or intraperitoneally injected melatonin (20 mg/kg) for 4 d consecutively, then exposed to 15-Gy X-ray radiation 1 h after the last administration...
April 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28411075/effect-of-gender-and-adiposity-on-in%C3%A2-vivo-vascular-function-in-young-african-americans
#10
Namrata Dass, Sindhu Kilakkathi, Brittaney Obi, Andrea Moosreiner, Shanthi Krishnaswami, Michael E Widlansky, Srividya Kidambi
The relationship between obesity and high blood pressure is not as strong among African Americans (AA) as compared to Caucasians. We designed the current study to determine the effect of adiposity on vascular endothelial function (a harbinger of hypertension) among young healthy AA without additional cardiovascular disease risk factors. A total of 108 AA subjects (46 women) between the ages of 18 and 45 years were recruited. All the subjects were normotensive, nonsmokers, and normoglycemic. Anthropometric and cardiovascular disease risk factor measurements (lipid, insulin resistance, and inflammatory markers) were obtained...
March 14, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28410667/comparative-effects-of-high-oleic-acid-vs-high-mixed-saturated-fatty-acid-obesogenic-diets-upon-pufa-metabolism-in-mice
#11
Matthew J Picklo, Joseph Idso, Drew R Seeger, Harold M Aukema, Eric J Murphy
Emerging evidence indicates that the fatty acid composition of obesogenic diets influences physiologic outcomes. There are scant data regarding how the content of non-essential fatty acids like monounsaturated fatty acids (MUFA) and saturated fatty acids (SFAs) impact the metabolism of polyunsaturated fatty acids (PUFAs). In this work, we tested the hypothesis that obesogenic diets enriched in oleic acid (OA; 18:1n-9) reduce polyunsaturated fatty acid (PUFA) levels vs an obesogenic diet enriched in SFAs. Adult male mice were fed for eight weeks either (1) a control 16% fat energy (en) diet with 5...
April 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28408965/phospholipase-c-related-catalytically-inactive-protein-can-regulate-obesity-a-state-of-peripheral-inflammation
#12
REVIEW
Yosuke Yamawaki, Kana Oue, Satomi Shirawachi, Satoshi Asano, Kae Harada, Takashi Kanematsu
Obesity is defined as abnormal or excessive fat accumulation. Chronic inflammation in fat influences the development of obesity-related diseases. Many reports state that obesity increases the risk of morbidity in many diseases, including hypertension, dyslipidemia, type 2 diabetes, coronary heart disease, stroke, sleep apnea, and breast, prostate and colon cancers, leading to increased mortality. Obesity is also associated with chronic neuropathologic conditions such as depression and Alzheimer's disease. However, there is strong evidence that weight loss reduces these risks, by limiting blood pressure and improving levels of serum triglycerides, total cholesterol, low-density lipoprotein (LDL)-cholesterol, and high-density lipoprotein (HDL)-cholesterol...
February 2017: Japanese Dental Science Review
https://www.readbyqxmd.com/read/28404627/multiphasic-regulation-of-systemic-and-peripheral-organ-metabolic-responses-to-cardiac-hypertrophy
#13
Chong Wee Liew, Shanshan Xu, Xuerong Wang, Maximilian McCann, Hyerim Whang Kong, Andrew C Carley, Jingbo Pang, Giamila Fantuzzi, J Michael O'Donnell, E Douglas Lewandowski
BACKGROUND: Reduced fat oxidation in hypertrophied hearts coincides with a shift of carnitine palmitoyl transferase I from muscle to increased liver isoforms. Acutely increased carnitine palmitoyl transferase I in normal rodent hearts has been shown to recapitulate the reduced fat oxidation and elevated atrial natriuretic peptide message of cardiac hypertrophy. METHODS AND RESULTS: Because of the potential for reduced fat oxidation to affect cardiac atrial natriuretic peptide, and thus, induce adipose lipolysis, we studied peripheral and systemic metabolism in male C57BL/6 mice model of transverse aortic constriction in which left ventricular hypertrophy occurred by 2 weeks without functional decline until 16 weeks (ejection fraction, -45...
April 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28401339/evaluation-of-the-r2-value-in-invasive-ductal-carcinoma-with-respect-to-hypoxic-related-prognostic-factors-using-iterative-decomposition-of-water-and-fat-with-echo-asymmetry-and-least-squares-emission-ideal
#14
Mari Miyata, Takatoshi Aoki, Shohei Shimajiri, Atsuji Matsuyama, Shunsuke Kinoshita, Masami Fujii, Takefumi Katsuki, Yuzuru Inoue, Yoshika Nagata, Yuko Tashima, Yukunori Korogi
OBJECTIVE: To correlate the R2* value obtained by iterative decomposition of water and fat with echo asymmetry and least-squares emission (IDEAL) with fibrotic focus (FF), microvessel density and hypoxic biomarker (HIF-1α) in breast carcinoma. METHODS: Forty-two patients who were diagnosed with invasive ductal carcinoma (IDC) of the breast underwent breast MRI including IDEAL before surgery. The entire region of interest (ROI) was delineated on the R2* map, and average tumour R2* value was calculated for each ROI...
April 11, 2017: European Radiology
https://www.readbyqxmd.com/read/28400405/nutritional-approaches-for-managing-obesity-associated-metabolic-diseases
#15
Rachel Botchlett, Shih-Lung Woo, Mengyang Liu, Ya Pei, Xin Guo, Honggui Li, Chaodong Wu
Obesity is an ongoing pandemic and serves as a causal factor of a wide spectrum of metabolic diseases including diabetes, fatty liver disease, and cardiovascular disease. Much evidence has demonstrated that nutrient overload initiates or exacerbates inflammatory responses in tissues/organs involved in the regulation of systemic metabolic homeostasis. This obesity-associated inflammation is usually at a low-grade and viewed as metabolic inflammation. When it exists continuously, inflammation inappropriately alters metabolic pathways and impairs insulin signaling cascades in peripheral tissues/organs such as adipose tissue, the liver and skeletal muscle, resulting in local fat deposition and insulin resistance and systemic metabolic dysregulation...
April 11, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28397070/ketone-bodies-as-anti-seizure-agents
#16
Timothy A Simeone, Kristina A Simeone, Jong M Rho
There is growing evidence that ketone bodies (KB)-derived from fatty acid oxidation and produced during fasting or consumption of high-fat diets-can exert broad neuroprotective effects. With respect to epilepsy, KB (such as β-hydroxybutyrate or BHB, acetoacetate and acetone) have been shown to block acutely induced and spontaneous recurrent seizures in various animal models. Although the mechanisms underlying the anti-seizure effects of KB have not been fully elucidated, recent experimental studies have invoked ketone-mediated effects on both inhibitory (e...
April 10, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28395172/monocyte-bioenergetic-function-is-associated-with-body-composition-in-virologically-suppressed-hiv-infected-women
#17
Amanda L Willig, Philip A Kramer, Balu K Chacko, Victor M Darley-Usmar, Sonya L Heath, E Turner Overton
Women living with HIV may present with high levels of body fat that are associated with altered bioenergetic function. Excess body fat may therefore exacerbate the bioenergetic dysfunction observed with HIV infection. To determine if body fat is associated with bioenergetic function in HIV, we conducted a cross-sectional study of 42 women with HIV who were virologically suppressed on antiretroviral therapy. Body composition was determined via dual-energy x-ray absorptiometry. Oxygen consumption rate (OCR) of monocytes was sorted from peripheral blood mononuclear cells obtained from participants in the fasting state...
April 4, 2017: Redox Biology
https://www.readbyqxmd.com/read/28391908/apob-lipoproteins-and-dysfunctional-white-adipose-tissue-relation-to-risk-factors-for-type-2-diabetes-in-humans
#18
Valérie Lamantia, Simon Bissonnette, Hanny Wassef, Yannick Cyr, Alexis Baass, Robert Dufour, Rémi Rabasa-Lhoret, May Faraj
BACKGROUND: Elevated plasma apoB is an independent predictor of T2D; however, underlying mechanisms remain unclear. Chronic reduction in white adipose tissue (WAT) function promotes T2D. We reported that differentiation of preadipocytes and acute incubation of human WAT with LDL induce their dysfunction (decreased hydrolysis and storage of triglyceride-rich lipoproteins [TRL]). OBJECTIVE: To examine the hypothesis that the association of plasma apoB with T2D risk factors, hypertriglyceridemia (hyperTG), insulin resistance (IR), and hyperinsulinemia, was dependent on WAT dysfunction...
January 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28390011/association-between-lifestyle-and-anthropometric-parameters-and-thyroid-nodule-features
#19
Grigorios Panagiotou, Despina Komninou, Panagiotis Anagnostis, George Linardos, Eleni Karoglou, Maria Somali, Leonidas Duntas, Marina Kita, Konstantinos Tziomalos, Kalliopi Pazaitou-Panayiotou
PURPOSE: Thyroid nodularity has been associated with obesity, but data regarding associations of body composition parameters with specific ultrasound features of thyroid nodules are lacking. The aim of the present study was to assess associations between thyroid nodule ultrasound characteristics, lifestyle, and anthropometric parameters. SUBJECTS AND METHODS: This was a cross-sectional study in the general apparently healthy population of Northern Greece. Thyroid ultrasound data together with medical history, demographic, and anthropometric characteristics were individually recorded...
April 8, 2017: Endocrine
https://www.readbyqxmd.com/read/28381495/dietary-reversal-of-neuropathy-in-a-murine-model-of-prediabetes-and-the-metabolic-syndrome
#20
Lucy M Hinder, Phillipe D O'Brien, John M Hayes, Carey Backus, Andrew P Solway, Catrina Sims-Robinson, Eva L Feldman
Patients with the metabolic syndrome, defined as obesity, dyslipidemia, hypertension, and impaired glucose tolerance (IGT), can develop the same macro- and microvascular complications as patients with type 2 diabetes, including peripheral neuropathy. In type 2 diabetes, glycemic control has little effect on the development and progression of peripheral neuropathy, suggesting that other metabolic syndrome components may contribute to the presence of neuropathy. A parallel phenomenon is observed in patients with prediabetes and the metabolic syndrome, where improvement in weight and dyslipidemia more closely correlates with restoration of nerve function than improvement in glycemic status...
April 5, 2017: Disease Models & Mechanisms
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