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https://www.readbyqxmd.com/read/28737815/isofraxidin-a-coumarin-component-improves-high-fat-diet-induced-hepatic-lipid-homeostasis-disorder-and-macrophage-inflammation-in-mice
#1
Jian Li, Xiaofei Li, Zhike Li, Lu Zhang, Yonggang Liu, Hong Ding, Shanye Yin
Isofraxidin (IF) is a coumarin compound produced in the functional foods Siberian ginseng and Apium graveolens. The first objective of this study was to investigate the protective effects and putative methods of IF in combating lipotoxicity in vitro and in vivo. Oleic acid was used to induce lipid turbulence in human hepatoma cells (HepG2). Alterations in triglyceride metabolism, inflammation and oxidative status were monitored. Results show that IF mainly reduced triglyceride accumulation, TNF-α release and ROS activation in metabolic disordered cells...
July 24, 2017: Food & Function
https://www.readbyqxmd.com/read/28736524/immune-and-metabolic-regulation-mechanism-of-dangguiliuhuang-decoction-against-insulin-resistance-and-hepatic-steatosis
#2
Hui Cao, Lingling Tuo, Yali Tuo, Ziyun Xia, Rong Fu, Yang Liu, Yihong Quan, Jue Liu, Zhihong Yu, Ming Xiang
Dangguiliuhuang decoction (DGLHD) is a traditional Chinese medicine (TCM) formula, which mainly consists of angelica, radix rehmanniae, radix rehmanniae praeparata, scutellaria baicalensis, coptis chinensis, astragalus membranaceus, and golden cypress, and used for the treatment of diabetes and some autoimmune diseases. In this study, we explored the potential mechanism of DGLHD against insulin resistance and fatty liver in vivo and in vitro. Our data revealed that DGLHD normalized glucose and insulin level, increased the expression of adiponectin, diminished fat accumulation and lipogenesis, and promoted glucose uptake...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28733671/short-chain-fatty-acids-and-inulin-but-not-guar-gum-prevent-diet-induced-obesity-and-insulin-resistance-through-differential-mechanisms-in-mice
#3
Karolin Weitkunat, Christin Stuhlmann, Anna Postel, Sandra Rumberger, Maria Fankhänel, Anni Woting, Klaus Jürgen Petzke, Sabrina Gohlke, Tim J Schulz, Michael Blaut, Susanne Klaus, Sara Schumann
The role of dietary fibre and short-chain fatty acids (SCFA) in obesity development is controversially discussed. Here, we investigated how various types of dietary fibre and different SCFA ratios affect metabolic syndrome-related disorders. Male mice (B6) were fed high-fat diets supplemented with dietary fibres (either cellulose, inulin or guar gum) or different Ac:Pr ratios (high acetate (HAc) or propionate (HPr)) for 30 weeks. Body-fat gain and insulin resistance were greatly reduced by inulin, but not by guar gum, and completely prevented by SCFA supplementation...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28732092/dietary-oleic-acid-regulates-hepatic-lipogenesis-through-a-liver-x-receptor-dependent-signaling
#4
Simon Ducheix, Alexandra Montagner, Arnaud Polizzi, Frédéric Lasserre, Marion Régnier, Alice Marmugi, Fadila Benhamed, Justine Bertrand-Michel, Laila Mselli-Lakhal, Nicolas Loiseau, Pascal G Martin, Jean-Marc Lobaccaro, Laurent Ferrier, Catherine Postic, Hervé Guillou
Olive oil consumption is beneficial for health as it is associated with a decreased prevalence of cancer and cardiovascular diseases. Oleic acid is, by far, the most abundant component of olive oil. Since it can be made through de novo synthesis in animals, it is not an essential fatty acid. While it has become clear that dietary oleic acid regulates many biological processes, the signaling pathway involved in these regulations remains poorly defined. In this work we tested the impact of an oleic acid-rich diet on hepatic gene expression...
2017: PloS One
https://www.readbyqxmd.com/read/28729415/an-essential-role-for-the-tumor-suppressor-merlin-in-regulating-fatty-acid-synthesis
#5
Dina S Stepanova, Galina Semenova, Yin-Ming Kuo, Andrew J Andrews, Sylwia Ammoun, C Oliver Hanemann, Jonathan Chernoff
Neurofibromatosis type 2 (NF2) is an autosomal dominant disorder characterized by the development of multiple tumors in the central nervous system, most notably schwannomas and meningiomas. Mutational inactivation of the NF2 gene encoding the protein Merlin is found in most sporadic and inherited schwannomas, but the molecular mechanisms underlying neoplastic changes in schwannoma cells remain unclear. We report here that NF2-deficient cells display elevated expression levels of key enzymes involved in lipogenesis and that this upregulation is caused by increased activity of Torc1...
July 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/28727056/effects-of-protein-and-fat-concentration-in-coproduct-based-growing-calf-diets-on-adipogenic-and-lipogenic-gene-expression-blood-metabolites-and-carcass-composition
#6
J R Segers, J J Loor, S J Moisá, D Gonzalez, D W Shike
Crossbred calves ( = 30; age = 95 ± 1.7 d; BW = 179 ± 18 kg) were fed 1 of 5 growing diets: 1) corn-based control, 2) low-fat, low-protein coproduct blend, 3) high-fat, low-protein coproduct blend, 4) low-fat, high-protein coproduct blend, and 5) high-fat, high-protein coproduct blend for 112 d (growing phase) followed by a common corn-based finishing diet (additional 112 d; finishing phase). Calves were biopsied at 0, 112, and 224 d for transcriptional analysis via real-time quantitative PCR of 14 genes associated with adipogenesis and lipogenesis within the muscle...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727036/supplementation-of-glycerol-or-fructose-via-drinking-water-to-grazing-lambs-on-tissue-glycogen-level-and-lipogenesis
#7
G Volpi-Lagreca, S K Duckett
Lambs ( = 18; 40.1 ± 7.4 kg BW) were used to assess supplementation of glycerol or fructose via drinking water on growth, tissue glycogen levels, postmortem glycolysis, and lipogenesis. Lambs were blocked by BW and allocated to alfalfa paddocks (2 lambs/paddock and 3 paddocks/treatment). Each paddock within a block was assigned randomly to drinking water treatments for 30 d: 1) control (CON), 2) 120 g fructose/L of drinking water (FRU), or 3) 120 g glycerol/L of drinking water (GLY). Lambs grazed alfalfa with free access to water treatments for 28 d and then were fasted in indoor pens for a final 2 d with access to only water treatments...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727015/triennial-growth-and-development-symposium-molecular-mechanisms-related-to-bovine-intramuscular-fat-deposition-in-the-longissimus-muscle
#8
M Baik, H J Kang, S J Park, S W Na, M Piao, S Y Kim, D M Fassah, Y S Moon
The intramuscular fat (IMF) content of the LM, also known as marbling, is particularly important in determining the price of beef in Korea, Japan, and the United States. Deposition of IMF is influenced by both genetic (e.g., breed, gender, and genotype) and nongenetic factors (e.g., castration, nutrition, stressors, animal weight, and age). Castration of bulls markedly increases deposition of IMF, resulting in improved beef quality. Here, we present a comparative gene expression approach between bulls and steers...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727003/triennial-growth-and-development-symposium-intramuscular-fat-deposition-in-ruminants-and-pigs-a-transcriptomics-perspective
#9
B P Dalrymple, B Guo
The genomics era has led to an explosion in the study of gene expression in production animals. Intramuscular fat (IMF) content (both high and low) and composition are major quality attributes of meat, and more than 90 transcriptomic studies of IMF deposition have been undertaken in the ruminants and pigs since 2001, with the majority since 2008. The studies have implicated many genes involved in the control of adipogenesis, lipogenesis, and deposition of IMF, but there is relatively little consistency between the different studies...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726934/clove-extract-functions-as-a-natural-fatty-acid-synthesis-inhibitor-and-prevents-obesity-in-a-mouse-model
#10
Yiran Ding, Zhennan Gu, Yihe Wang, Shunhe Wang, Haiqin Chen, Hao Zhang, Wei Chen, Yong Q Chen
Numerous medicinal plants have been reported to prevent various chronic diseases. In this study, we screened a new FASN inhibitor-alcohol extract of clove (AEC) using a fast microplate method developed in our laboratory. The major components of AEC were: eugenol (42.27%), acetyl eugenol (29.12%), caryophyllene (15.40%), and humulene (3.22%). Fatty acid synthase (FASN) is a key enzyme for de novo lipogenesis, and it has been suggested as a potential therapeutic target in cancer and obesity. We have tested the ability of AEC to inhibit FASN in mammalian cells and tissues...
July 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28724915/quinolinate-phosphoribosyltransferase-is-an-antiviral-host-factor-against-hepatitis-c-virus-infection
#11
Zhilong Wang, Yanhang Gao, Chao Zhang, Haiming Hu, Dongwei Guo, Yi Xu, Qiuping Xu, Weihong Zhang, Sisi Deng, Pingyun Lv, Yan Yang, Yanhua Ding, Qingquan Li, Changjiang Weng, Xinwen Chen, Sitang Gong, Hairong Chen, Junqi Niu, Hong Tang
HCV infection can decrease NAD(+)/NADH ratio, which could convert lipid metabolism to favor HCV replication. In hepatocytes, quinolinate phosphoribosyl transferase (QPRT) catabolizes quinolinic acid (QA) to nicotinic acid mononucleotide (NAMN) for de novo NAD synthesis. However, whether and how HCV modulates QPRT hence the lipogenesis is unknown. In this work, we found QPRT was reduced significantly in livers of patients or humanized C/O(Tg) mice with persistent HCV infection. Mechanistic studies indicated that HCV NS3/4A promoted proteasomal degradation of QPRT through Smurf2, an E3 ubiquitin-protein ligase, in Huh7...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724855/decreased-fatty-acid-%C3%AE-oxidation-is-the-main-cause-of-fatty-liver-induced-by-polyunsaturated-fatty-acid-deficiency-in-mice
#12
Takero Nakajima, Yang Yang, Yu Lu, Yuji Kamijo, Yosuke Yamada, Kozo Nakamura, Masahiro Koyama, Shohei Yamaguchi, Eiko Sugiyama, Naoki Tanaka, Toshifumi Aoyama
Insufficient intake of polyunsaturated fatty acids (PUFA) causes fatty liver. The mechanism responsible is primarily related to increased lipogenesis and decreased FA degradation based on rodent studies. However, these studies were limited by the fact that the typical PUFA-deficient diets contained insufficient amounts of long-chain FA, the PUFA-containing diets were primarily composed of n-3 PUFA-enriched oil, and the intake of PUFA was excessive compared with the physiological requirement. To address these issues, mice were fed a PUFA-deficient diet containing long-chain FA at a standard fed level and then were orally fed a n-3/n-6-balanced PUFA-containing oil [PUFA (+)] or a PUFA-deficient oil [PUFA (-)] at physiological relevant levels (0...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28720427/the-challenges-and-promise-of-targeting-the-liver-x-receptors-for-treatment-of-inflammatory-disease
#13
REVIEW
Michael B Fessler
The Liver X Receptors (LXRs) are oxysterol-activated transcription factors that upregulate a suite of genes that together promote coordinated mobilization of excess cholesterol from cells and from the body. The LXRs, like other nuclear receptors, are anti-inflammatory, inhibiting signal-dependent induction of pro-inflammatory genes by nuclear factor-κB, activating protein-1, and other transcription factors. Synthetic LXR agonists have been shown to ameliorate atherosclerosis and a wide range of inflammatory disorders in preclinical animal models...
July 16, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28711683/anti-obesogenic-effects-of-wy14643-ppar-alpha-agonist-hepatic-mitochondrial-enhancement-and-suppressed-lipogenic-pathway-in-diet-induced-obese-mice
#14
Flavia Maria Silva Veiga, Francielle Graus-Nunes, Tamiris Lima Rachid, Aline Barcellos Barreto, Carlos Alberto Mandarim-de-Lacerda, Vanessa Souza-Mello
Non-alcoholic fatty liver disease (NAFLD) presents with growing prevalence worldwide, though its pharmacological treatment remains to be established. This study aimed to evaluate the effects of a PPAR-alpha agonist on liver tissue structure, ultrastructure, and metabolism, focusing on gene and protein expression of de novo lipogenesis and gluconeogenesis pathways, in diet-induced obese mice. Male C57BL/6 mice (three months old) received a control diet (C, 10% of lipids, n = 10) or a high-fat diet (HFD, 50% of lipids, n = 10) for ten weeks...
July 12, 2017: Biochimie
https://www.readbyqxmd.com/read/28707223/inhibition-of-exendin-4-induced-steatosis-by-protein-kinase-a-in-cultured-hepg2-human-hepatoma-cells
#15
Alice Y Chen-Liaw, Gabrielle Hammel, George Gomez
Nonalcoholic fatty liver is characterized by the abnormal accumulation of triglycerides within hepatocytes, resulting in a steatotic liver. Glucagon-like peptide 1 and its analog exendin-4 can ameliorate certain aspects of this syndrome by inducing weight loss and reducing hepatic triglyceride accumulation, but it is unclear whether these effects result from the effects of glucagon-like peptide 1 on the pancreas, or from direct action on the liver. This study investigated the direct action and putative cellular mechanism of exendin-4 on steatotic hepatocytes in culture...
July 13, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28696211/rab8a-deficiency-in-skeletal-muscle-causes-hyperlipidemia-and-hepatosteatosis-via-impairment-of-muscle-lipid-uptake-and-storage
#16
Qiaoli Chen, Ping Rong, Dijin Xu, Sangsang Zhu, Liang Chen, Bingxian Xie, Qian Du, Chao Quan, Yang Sheng, Tong-Jin Zhao, Peng Li, Hong Yu Wang, Shuai Chen
Skeletal muscle absorbs long chain fatty acids (LCFA) that are either oxidized in mitochondria or temporarily stored as triglycerides in lipid droplets (LDs). So far, it is still not fully understood how muscle lipid uptake and storage is regulated and whether it is important for whole-body lipid homeostasis. Here we show that the small GTPase Rab8a regulates muscle lipid uptake and storage in skeletal muscle. Muscle-specific Rab8a deletion caused hyperlipidemia and exacerbated high fat diet (HFD)-induced hepatosteatosis...
July 10, 2017: Diabetes
https://www.readbyqxmd.com/read/28687876/chromosome-21-encoded-micrornas-mrnas-impact-on-down-s-syndrome-and-trisomy-21-linked-disease
#17
P N Alexandrov, M E Percy, Walter J Lukiw
Down's syndrome (DS; also known as trisomy 21; T21) is caused by a triplication of all or part of human chromosome 21 (chr21). DS is the most common genetic cause of intellectual disability attributable to a naturally-occurring imbalance in gene dosage. DS incurs huge medical, healthcare, and socioeconomic costs, and there are as yet no effective treatments for this incapacitating human neurogenetic disorder. There is a remarkably wide variability in the 'phenotypic spectrum' associated with DS; the progression of symptoms and the age of DS onset fluctuate, and there is further variability in the biophysical nature of the chr21 duplication...
July 7, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28683308/microbial-host-co-metabolites-are-prodromal-markers-predicting-phenotypic-heterogeneity-in-behavior-obesity-and-impaired-glucose-tolerance
#18
Marc-Emmanuel Dumas, Alice R Rothwell, Lesley Hoyles, Thomas Aranias, Julien Chilloux, Sophie Calderari, Elisa M Noll, Noémie Péan, Claire L Boulangé, Christine Blancher, Richard H Barton, Quan Gu, Jane F Fearnside, Chloé Deshayes, Christophe Hue, James Scott, Jeremy K Nicholson, Dominique Gauguier
The influence of the gut microbiome on metabolic and behavioral traits is widely accepted, though the microbiome-derived metabolites involved remain unclear. We carried out untargeted urine (1)H-NMR spectroscopy-based metabolic phenotyping in an isogenic C57BL/6J mouse population (n = 50) and show that microbial-host co-metabolites are prodromal (i.e., early) markers predicting future divergence in metabolic (obesity and glucose homeostasis) and behavioral (anxiety and activity) outcomes with 94%-100% accuracy...
July 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/28683288/hypothalamic-ampk-er-stress-jnk1-axis-mediates-the-central-actions-of-thyroid-hormones-on-energy-balance
#19
Noelia Martínez-Sánchez, Patricia Seoane-Collazo, Cristina Contreras, Luis Varela, Joan Villarroya, Eva Rial-Pensado, Xabier Buqué, Igor Aurrekoetxea, Teresa C Delgado, Rafael Vázquez-Martínez, Ismael González-García, Juan Roa, Andrew J Whittle, Beatriz Gomez-Santos, Vidya Velagapudi, Y C Loraine Tung, Donald A Morgan, Peter J Voshol, Pablo B Martínez de Morentin, Tania López-González, Laura Liñares-Pose, Francisco Gonzalez, Krishna Chatterjee, Tomás Sobrino, Gema Medina-Gómez, Roger J Davis, Núria Casals, Matej Orešič, Anthony P Coll, Antonio Vidal-Puig, Jens Mittag, Manuel Tena-Sempere, María M Malagón, Carlos Diéguez, María Luz Martínez-Chantar, Patricia Aspichueta, Kamal Rahmouni, Rubén Nogueiras, Guadalupe Sabio, Francesc Villarroya, Miguel López
Thyroid hormones (THs) act in the brain to modulate energy balance. We show that central triiodothyronine (T3) regulates de novo lipogenesis in liver and lipid oxidation in brown adipose tissue (BAT) through the parasympathetic (PSNS) and sympathetic nervous system (SNS), respectively. Central T3 promotes hepatic lipogenesis with parallel stimulation of the thermogenic program in BAT. The action of T3 depends on AMP-activated protein kinase (AMPK)-induced regulation of two signaling pathways in the ventromedial nucleus of the hypothalamus (VMH): decreased ceramide-induced endoplasmic reticulum (ER) stress, which promotes BAT thermogenesis, and increased c-Jun N-terminal kinase (JNK) activation, which controls hepatic lipid metabolism...
July 5, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28680065/nopal-opuntia-ficus-indica-protects-from-metabolic-endotoxemia-by-modifying-gut-microbiota-in-obese-rats-fed-high-fat-sucrose-diet
#20
Mónica Sánchez-Tapia, Miriam Aguilar-López, Claudia Pérez-Cruz, Edgar Pichardo-Ontiveros, Mei Wang, Sharon M Donovan, Armando R Tovar, Nimbe Torres
Current efforts are directed to reducing the gut dysbiosis and inflammation produced by obesity. The purpose of this study was to investigate whether consuming nopal, a vegetable rich in dietary fibre, vitamin C, and polyphenols can reduce the metabolic consequences of obesity by modifying the gut microbiota and preventing metabolic endotoxemia in rats fed a high fat and sucrose diet. With this aim, rats were fed a high fat diet with 5% sucrose in the drinking water (HFS) for 7 months and then were fed for 1 month with HFS + 5% nopal (HFS + N)...
July 5, 2017: Scientific Reports
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