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https://www.readbyqxmd.com/read/28636830/attenuation-of-hepatic-steatosis-by-purple-sweet-potato-color-is-associated-with-blocking-src-erk-c-ebp%C3%AE-signalling-in-high-fat-diet-treated-mice
#1
Xin Wang, Zi-Feng Zhang, Gui-Hong Zheng, Ai-Min Wang, Chun-Hui Sun, Su-Ping Qin, Juan Zhuang, Jun Lu, Dai-Fu Ma, Yuan-Lin Zheng
Our previous work showed that purple sweet potato color (PSPC), a class of naturally occurring anthocyanins, effectively improved hepatic glucose metabolic dysfunction in high-fat diet (HFD)-treated mice. This study investigated the effects of PSPC on HFD-induced hepatic steatosis and the signalling events associated with these effects. Mice were divided into four groups: Control group, HFD group, HFD+PSPC group and PSPC group. PSPC was administered daily for 20 weeks at oral doses of 700 mg/kg/day. Our results showed that PSPC significantly improved obesity and related metabolic parameters, as well as liver injury in HFD-treated mice...
June 21, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28636665/monitoring-obesity-prevalence-in-the-united-states-through-bookmarking-activities-in-online-food-portals
#2
Christoph Trattner, Denis Parra, David Elsweiler
Studying the impact of food consumption on people's health is a serious matter for its implications on public policy, but it has traditionally been a slow process since it requires information gathered through expensive collection processes such as surveys, census and systematic reviews of research articles. We argue that this process could be supported and hastened using data collected via online social networks. In this work we investigate the relationships between the online traces left behind by users of a large US online food community and the prevalence of obesity in 47 states and 311 counties in the US...
2017: PloS One
https://www.readbyqxmd.com/read/28633927/dencichine-ameliorates-kidney-injury-in-induced-type-ii-diabetic-nephropathy-via-the-tgf-%C3%AE-smad-signalling-pathway
#3
Li Jie, Qiu Pengcheng, He Qiaoyan, Bi Linlin, Zhang Meng, Wang Fang, Jia Min, Yan Li, Zhang Ya, Yang Qian, Wang Siwang
Diabetic nephropathy (DN), a common complication associated with both type I and type II diabetes mellitus (DM), is a major cause of chronic nephropathy and a common cause of end-stage renal diseases (ESRD) throughout the world. This study is aimed to determine whether dencichine (De) can ameliorate renal damage in high-glucose-and-fat diet combined STZ (streptozocin) induced DN in type II DM rats and to investigate the potential underlying mechanisms. Markers of metabolism, diabetes, and renal function, and levels of extracellular matrix (ECM) collagen I (Col I), collagen IV (Col IV), fibronectin (FN) and laminin (LN), and of proteins in the TGF-β/Smad pathway were analysed through RT-PCR, western blot, immunofluorescence and immunohistochemistry...
June 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28631015/ask-yeast-how-to-burn-your-fats-lessons-learned-from-the-metabolic-adaptation-to-salt-stress
#4
REVIEW
Amparo Pascual-Ahuir, Sara Manzanares-Estreder, Alba Timón-Gómez, Markus Proft
Here, we review and update the recent advances in the metabolic control during the adaptive response of budding yeast to hyperosmotic and salt stress, which is one of the best understood signaling events at the molecular level. This environmental stress can be easily applied and hence has been exploited in the past to generate an impressively detailed and comprehensive model of cellular adaptation. It is clear now that this stress modulates a great number of different physiological functions of the cell, which altogether contribute to cellular survival and adaptation...
June 19, 2017: Current Genetics
https://www.readbyqxmd.com/read/28630415/integrating-genome-and-transcriptome-profiling-for-elucidating-the-mechanism-of-muscle-growth-and-lipid-deposition-in-pekin-ducks
#5
Liyuan Wang, Xiangxiang Li, Jun Ma, Yawen Zhang, Hao Zhang
Muscle growth and lipid deposition are co-ordinately regulated processes. Cherry Valley Pekin duck is a lean-type duck breed with high growth rate, whereas the native Pekin duck of China has high lipid deposition. Phenotypic analysis showed that native Pekin ducks have smaller fibre diameter and larger density in the breast muscle at 3 weeks of age and higher intramuscular fat content at 6 weeks of age than those in Cherry Valley Pekin ducks. We detected 17 positively selected genes (PSGs) by comparing genes mainly involved with muscle organ development, muscle contraction, peroxisome proliferator activated receptor signalling pathway, and fatty acid metabolism...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630339/ucp1-deficiency-causes-brown-fat-respiratory-chain-depletion-and-sensitizes-mitochondria-to-calcium-overload-induced-dysfunction
#6
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/28629956/effects-of-fat-saturation-on-short-t2-quantification
#7
Michael Carl, Amin Nazaran, Graeme M Bydder, Jiang Du
Ultrashort TE (UTE) sequences have the capability to image tissues with very short T2s that typically appear as low signal in clinical sequences. UTE sequences can also be used in multi-echo acquisitions which allow assessment of the T2s of these tissues. Here we study the accuracy of such T2 measurements when combined with fat saturation (FS).
June 16, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28629772/impact-of-the-cardiovascular-system-associated-adipose-tissue-on-atherosclerotic-pathology
#8
REVIEW
Dimitry A Chistiakov, Andrey V Grechko, Veronika A Myasoedova, Alexandra A Melnichenko, Alexander N Orekhov
Cardiac obesity makes an important contribution to the pathogenesis of cardiovascular disease. One of the important pathways of this contribution is the inflammatory process that takes place in the adipose tissue. In this review, we consider the role of the cardiovascular system-associated fat in atherosclerotic cardiovascular pathology and a non-atherosclerotic cause of coronary artery disease, such as atrial fibrillation. Cardiovascular system-associated fat not only serves as the energy store, but also releases adipokines that control local and systemic metabolism, heart/vascular function and vessel tone, and a number of vasodilating and anti-inflammatory substances...
June 8, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28629513/erythropoietin-and-hypothalamic-pituitary-axis
#9
Soumyadeep Dey, Constance T Noguchi
Erythropoietin (EPO), known primarily for its erythropoietic activity, is commonly used clinically to treat anemia of chronic kidney disease. However, the expression of EPO receptor (EpoR) beyond erythroid tissue provides for potential extrahematopoietic effects of EPO, including EPO regulation of metabolic homeostasis (Zhang et al., 2014). Small clinical studies have shown that EPO treatment in patients with end-stage renal disease improved glycemic control and insulin sensitivity. Studies in animal models have shown that EPO regulation of metabolism is mainly attributed to its response in fat, and the hypothalamus-pituitary axis (Dey et al...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28629266/polygonatum-sibiricum-polysaccharide-promotes-osteoblastic-differentiation-through-the-erk-gsk-3%C3%AE-%C3%AE-catenin-signaling-pathway-in-vitro
#10
Xiaoming Peng, Jichen He, Jinmin Zhao, Yunle Wu, Xiongzhi Shi, Li Du, Mengni Nong, Shaohui Zong, Gao-Feng Zeng
Natural compound Polygonatum sibiricum polysaccharide (PSP) has a variety of biological actions such as reducing blood fat, antitumor, antioxidant activities, and enhancing immune function. In our previous study has revealed that PSP can promote osteoblastic differentiation in bone mesenchymal stem cells (BMSCs) by increasing nuclear accumulation of β-catenin. This study was designed to investigate that PSP can upregulate nuclear β-catenin, which was prevented by inhibiting glycogen synthase kinase 3β (GSK-3β) activity, by effectively activating Wnt signaling independent of low-density lipoprotein receptor-related protein (LRP5) ...
June 19, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28627418/alterations-in-neuronal-control-of-body-weight-and-anxiety-behavior-by-glutathione-peroxidase-4-deficiency
#11
Sonja C Schriever, Annemarie Zimprich, Katrin Pfuhlmann, Peter Baumann, Florian Giesert, Valentina Klaus, Dhiraj G Kabra, Ulrich Hafen, Artem Romanov, Matthias H Tschöp, Wolfgang Wurst, Marcus Conrad, Sabine M Hölter, Daniela Vogt Weisenhorn, Paul T Pfluger
Elevated levels of oxidative stress and neuronal inflammation in the hypothalamus or ventral midbrain, respectively, represent common denominators for obesity and Parkinson's Disease (PD). However, little is known about defense mechanisms that protect neurons in these regions from oxidative damage. Here, we aimed to assess whether murine Gpx4, a crucial antioxidant enzyme that protects neurons from membrane damage and ferroptosis, is critical for the protection from neuronal inflammation in two distinct pathophysiologic diseases, namely metabolic dysfunction in diet-induced obesity or PD...
June 13, 2017: Neuroscience
https://www.readbyqxmd.com/read/28626099/-a-cross-sectional-study-on-the-correlation-between-mri-signal-for-ipfp-and-knee-osteoarthritis
#12
Song Wu, Hongliang Ba, Jinshen He, Yunjie Liao
To investigate the correlation between MRI signal for infrapatellar fat pad (IPFP) and pathological changes in knee osteoarthritis (KOA), and to analyze the role of IPFP in the development of knee osteoarthritis.
 Methods: A total of 114 subjects (without special knee disease) were enrolled for this study. The intensity of MRI signal for IPFP was determined by fat-suppressed proton-density-weighted turbospin-echo magnetic resonance imaging. Based on the cartilage defects and osteophytes of knee joint, the subjects were divided into a KOA group and a control group...
May 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28625915/high-fat-diet-induced-obesity-increases-myocardial-injury-and-alters-cardiac-stat3-signaling-in-mice-after-polymicrobial-sepsis
#13
Theodore DeMartini, Marchele Nowell, Jeanne James, Lauren Williamson, Patrick Lahni, Hui Shen, Jennifer M Kaplan
Little is known about how obesity affects the heart during sepsis and we sought to investigate the obesity-induced cardiac effects that occur during polymicrobial sepsis. Six-week old C57BL/6 mice were randomized to a high fat (HFD) (60% kcal fat) or normal diet (ND) (16% kcal fat). After 6 wks of feeding, mice were anesthetized with isoflurane and polymicrobial sepsis was induced by cecal ligation and puncture (CLP). Plasma and cardiac tissue were obtained for analysis. Echocardiography was performed on a separate cohort of mice at 0 and 18h after CLP...
June 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28625150/update-on-the-molecular-mechanisms-underlying-the-effect-of-cholecystokinin-and-cholecystokinin-1-receptor-on-the-formation-of-cholesterol-gallstones
#14
Helen H Wang, Piero Portincasa, David Q-H Wang
Cholecystokinin (CCK) is an important neuro-intestinal peptide hormone produced by the enteroendocrine I-cells in the upper part of small intestine. Protein- and fat-enriched food plays an important role in triggering CCK secretion from the intestine. Carbohydrates stimulate only small amounts of CCK release. The CCK-1 receptor (CCK-1R) is largely localized in the gallbladder, sphincter of Oddi, pancreas, small intestine, gastric mucosa, and pyloric sphincter, where it is responsible for CCK to regulate multiple digestive processes including gallbladder contraction, pancreatic secretion, small intestinal transit, and gastric emptying...
June 19, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28624657/adiponectin-improves-the-osteointegration-of-titanium-implant-under-diabetic-conditions-by-reversing-mitochondrial-dysfunction-via-the-ampk-pathway-in-vivo-and-in-vitro
#15
Xiao-Fan Hu, Lin Wang, Yi-Zhao Lu, Geng Xiang, Zi-Xiang Wu, Ya-Bo Yan, Yang Zhang, Xiong Zhao, Yuan Zang, Lei Shi, Wei Lei, Ya-Fei Feng
Diabetes-induced reactive oxygen species (ROS) overproduction would result in compromised osteointegration of titanium implant (TI) and high rate of implant failure, yet the underlying mechanisms remain elusive. Adiponectin (APN) is a fat-derived adipocytokine with strong antioxidant, mitochondrial-protective and anti-diabetic efficacies. We hypothesized that mitochondrial dysfunction under diabetes may account for the oxidative stress in osteoblasts and titanium-bone interface (TBI) instability, which could be ameliorated by APN...
June 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28622065/leptin-gene-transfer-improves-symptoms-of-type-2-diabetic-mice-by-regulating-leptin-signaling-pathway-and-insulin-resistance-of-peripheral-tissues
#16
Lan Xiang, Jing Li, Qian Wang, Ruiqi Tang, Jianhua Qi
The leptin gene was transferred into the liver of streptozocin- and high fat diet-induced type 2 diabetic (T2D) mice by hydrodynamic-based gene delivery. The food intake, water consumption, glucose concentration, and triglyceride, total cholesterol levels of T2D mice were significantly decreased. Meanwhile, plasma leptin was remarkably increased after gene transfer for 2, 3, 5, and 7 days, while plasma adiponectin was also significantly increased at day 2. To understand the mechanism of action of leptin on T2D mice, gene expressions related to glycometabolism and energy metabolism in the liver, epididymal adipose tissue, hypothalamus, and muscle were measured...
June 16, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28620387/notch-regulates-macrophage-mediated-inflammation-in-diabetic-wound-healing
#17
Andrew S Kimball, Amrita D Joshi, Anna E Boniakowski, Matthew Schaller, Jooho Chung, Ronald Allen, Jennifer Bermick, William F Carson, Peter K Henke, Ivan Maillard, Steve L Kunkel, Katherine A Gallagher
Macrophages are essential immune cells necessary for regulated inflammation during wound healing. Recent studies have identified that Notch plays a role in macrophage-mediated inflammation. Thus, we investigated the role of Notch signaling on wound macrophage phenotype and function during normal and diabetic wound healing. We found that Notch receptor and ligand expression are dynamic in wound macrophages during normal healing. Mice with a myeloid-specific Notch signaling defect (DNMAML(floxed)Lyz2(Cre+) ) demonstrated delayed early healing (days 1-3) and wound macrophages had decreased inflammatory gene expression...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28620088/the-r148-3-gene-modulates-caenorhabditis-elegans-lifespan-and-fat-metabolism
#18
Catherine Roy-Bellavance, Jennifer M Grants, Stéphanie Miard, Kayoung Lee, Évelyne Rondeau, Chantal Guillemette, Martin J Simard, Stefan Taubert, Frédéric Picard
Despite many advances, the molecular links between energy metabolism and longevity are not well understood. Here, we have used the nematode model Caenorhabditis elegans to study the role of the yet uncharacterized gene R148.3 in fat accumulation and lifespan. In wild-type worms, a R148.3p::GFP reporter showed enhanced expression throughout life in the pharynx, in neurons, and in muscles. Functionally, a protein fusing a predicted 22 aa N-terminal signal sequence (SS) of R148.3 to mCherry displayed robust accumulation in coelomyocytes, indicating that R148...
June 15, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28618839/sphingosine-kinase-and-sphingosine-1-phosphate-in-liver-pathobiology
#19
Timothy Rohrbach, Michael Maceyka, Sarah Spiegel
Over 20 years ago, sphingosine-1-phosphate (S1P) was discovered to be a bioactive signaling molecule. Subsequent studies later identified two related kinases, sphingosine kinase 1 and 2, which are responsible for the phosphorylation of sphingosine to S1P. Many stimuli increase sphingosine kinase activity and S1P production and secretion. Outside the cell, S1P can bind to and activate five S1P-specific G protein-coupled receptors (S1PR1-5) to regulate many important cellular and physiological processes in an autocrine or paracrine manner...
June 15, 2017: Critical Reviews in Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28618417/cholesterol-enhances-colorectal-cancer-progression-via-ros-elevation-and-mapk-signaling-pathway-activation
#20
Caihua Wang, Peiwei Li, Junmei Xuan, Chunpeng Zhu, Jingjing Liu, Lizhen Shan, Qin Du, Yuezhong Ren, Jun Ye
BACKGROUND/AIMS: Elevated serum cholesterol levels were linked to a higher risk of colorectal adenoma and colorectal cancer (CRC), while the effect of cholesterol on CRC metastasis has not been widely studied. METHODS: CRC patients were enrolled to evaluate the association between low-density lipoprotein cholesterol (LDL) and CRC metastases, and LDL receptor (LDLR) level of the CRC tissue was assessed by immunohistochemistry. The effects of LDL on cell proliferation, migration and stemness were assessed in CRC cells in vitro, and the effects of high fat diet (HFD) on tumor growth and intestinal tumorigenicity were investigated in vivo...
June 15, 2017: Cellular Physiology and Biochemistry
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