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https://www.readbyqxmd.com/read/28239648/liver-x-receptor-%C3%AE-mediates-hepatic-triglyceride-accumulation-through-upregulation-of-g0-g1-switch-gene-2-expression
#1
Bradlee L Heckmann, Xiaodong Zhang, Alicia M Saarinen, Gabriele Schoiswohl, Erin E Kershaw, Rudolf Zechner, Jun Liu
Liver X receptors (LXRs) are transcription factors essential for cholesterol homeostasis and lipogenesis. LXRα has been implicated in regulating hepatic triglyceride (TG) accumulation upon both influx of adipose-derived fatty acids (FAs) during fasting and stimulation of de novo FA synthesis by chemical agonism of LXR. However, whether or not a convergent mechanism is employed to drive deposition of FAs from these 2 different sources in TGs is undetermined. Here, we report that the G0/G1 Switch Gene 2 (G0S2), a selective inhibitor of intracellular TG hydrolysis/lipolysis, is a direct target gene of LXRα...
February 23, 2017: JCI Insight
https://www.readbyqxmd.com/read/28239368/connection-of-nicotine-to-diet-induced-obesity-and-non-alcoholic-fatty-liver-disease-cellular-and-mechanistic-insights
#2
REVIEW
Amiya P Sinha-Hikim, Indrani Sinha-Hikim, Theodore C Friedman
Non-alcoholic fatty liver disease (NAFLD) poses a serious health hazard affecting 20-40% of adults in the general population in the USA and over 70% of the obese and extremely obese people. In addition to obesity, nicotine is recognized as a risk factor for NAFLD, and it has been reported that nicotine can exaggerate obesity-induced hepatic steatosis. The development of NAFLD has serious clinical complications because of its potential progression from simple hepatic steatosis to non-alcoholic steatohepatitis (NASH), liver cirrhosis, and hepatocellular carcinoma...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28237722/dapper1-attenuates-hepatic-gluconeogenesis-and-lipogenesis-by-activating-pi3k-akt-signaling
#3
Jian-Ren Kuang, Zhi-Hui Zhang, Wei-Ling Leng, Xiao-Tian Lei, Zi-Wen Liang
Studies have shown that hepatic insulin resistance, a disorder of glucose and lipid metabolism, plays a vital role in type 2 diabetes (T2D). To clarify the function of Dapper1 in glucose and lipid metabolism in the liver, we investigated the relationships between Dapper1 and adenosine triphosphate (ATP)- and Ca(2+)-mediated activation of PI3K/Akt. We observed a reduction in hepatic Dapper1 in db/db (mice that are homozygous for a spontaneous diabetes mutation) and HFD-induced diabetic mice with T2D. Hepatic overexpression of Dapper1 improved hyperglycemia, insulin resistance, and fatty liver...
February 22, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28235645/modification-of-the-fatty-acid-composition-of-an-obesogenic-diet-improves-the-maternal-and-placental-metabolic-environment-in-obese-pregnant-mice
#4
Martina Gimpfl, Jan Rozman, Maik Dahlhoff, Raphaela Kübeck, Andreas Blutke, Birgit Rathkolb, Martin Klingenspor, Martin Hrabě de Angelis, Soner Öner-Sieben, Annette Seibt, Adelbert A Roscher, Eckhard Wolf, Regina Ensenauer
Peri-conceptional exposure to maternal obesogenic nutrition is associated with in utero programming of later-life overweight and metabolic disease in the offspring. We aimed to investigate whether dietary intervention with a modified fatty acid quality in an obesogenic high-calorie (HC) diet during the preconception and gestational phases can improve unfavourable effects of an adipogenic maternal environment. In NMRI mice, peri-conceptional and gestational obesity was induced by feeding a HC diet (controls), and they were compared with dams on a fat-modified (Fat-mod) HC diet of the same energy content but enriched with medium-chain fatty acids (MCFAs) and adjusted to a decreased ratio of n-6 to n-3 long-chain polyunsaturated fatty acids (LC-PUFAs)...
February 21, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28231178/stimulatory-effects-of-cinnamon-extract-cinnamomum-cassia-during-the-initiation-stage-of-3t3-l1-adipocyte-differentiation
#5
Sang Gil Lee, Joanna A Siaw, Hye Won Kang
Cinnamon (Cinnamomum cassia) has an anti-diabetic effect by possibly increasing the lipid storage capacity of white adipocytes; however, this effect remains controversial. The aim of this study was to examine which stage of adipogenesis is critical for the stimulatory effect of cinnamon in adipogenesis using 3T3-L1 cells. Cells were treated with cinnamon extract during three different stages of adipogenesis. We found that genes related to adipogenesis and lipogenesis were enhanced when cinnamon extract was administered during the initiation stage of differentiation but not when administered during the preadipocyte and post stages of differentiation...
December 6, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28225186/randomised-clinical-trial-the-efficacy-and-safety-of-oltipraz-a-liver-x-receptor-alpha-inhibitory-dithiolethione-in-patients-with-non-alcoholic-fatty-liver-disease
#6
W Kim, B G Kim, J S Lee, C K Lee, J E Yeon, M S Chang, J H Kim, H Kim, S Yi, J Lee, J-Y Cho, S G Kim, J-H Lee, Y J Kim
BACKGROUND: Oltipraz is a synthetic dithiolethione with an antisteatotic effect by inhibiting the activity of liver X receptor alpha (LXR-α). Recent studies demonstrated the disruptive role of oltipraz on LXR-α-dependent lipogenesis in hepatocytes and a high-fat diet mouse model. AIM: To evaluate the efficacy and safety of oltipraz for reducing liver fat in subjects with non-alcoholic fatty liver disease (NAFLD). METHODS: We performed a multicentre, double-blind, placebo-controlled, phase II study...
February 22, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28223420/new-connections-new-targets-for-fighting-hepatic-steatosis
#7
Wei Wong
Insight into the signaling pathways that regulate de novo lipogenesis may lead to new treatments for hepatic steatosis.
February 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/28223413/transcriptional-activation-of-lipogenesis-by-insulin-requires-phosphorylation-of-med17-by-ck2
#8
Jose A Viscarra, Yuhui Wang, Il-Hwa Hong, Hei Sook Sul
De novo lipogenesis is precisely regulated by nutritional and hormonal conditions. The genes encoding various enzymes involved in this process, such as fatty acid synthase (FASN), are transcriptionally activated in response to insulin. We showed that USF1, a key transcription factor for FASN activation, directly interacted with the Mediator subunit MED17 at the FASN promoter. This interaction recruited Mediator, which can bring POL II and other general transcription machinery to the complex. Moreover, we showed that MED17 was phosphorylated at Ser(53) by casein kinase 2 (CK2) in the livers of fed mice or insulin-stimulated hepatocytes, but not in the livers of fasted mice or untreated hepatocytes...
February 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/28220633/fatty-acid-composition-fat-deposition-lipogenic-gene-expression-and-performance-of-broiler-fed-diet-supplemented-with-different-sources-of-oil
#9
Jannatara Khatun, Teck Chwen Loh, Henny Akit, Hooi Ling Foo, Rosfarizan Mohamad
The present study assessed the effect of feeding palm oil (PO), sunflower oil (SO) and their combination on performance, fat deposition, fatty acid composition and lipogenic gene expression of broilers reared for 42 days. A total of 144 1-day-old broilers (Cobb500) were randomly allotted into four treatment diets with each having six replicates of six chicks in each replicate following a completely randomized design. Live weight gain and feed efficiency was significantly (P < 0.05) higher in birds fed with a combination of oil sources compared to controls...
February 21, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28218306/plin5-alleviates-myocardial-ischaemia-reperfusion-injury-by-reducing-oxidative-stress-through-inhibiting-the-lipolysis-of-lipid-droplets
#10
Pengfei Zheng, Zhonglin Xie, Yuan Yuan, Wen Sui, Chao Wang, Xing Gao, Yuanlin Zhao, Feng Zhang, Yu Gu, Peizhen Hu, Jing Ye, Xuyang Feng, Lijun Zhang
Myocardial ischaemia-reperfusion (I/R) injury is a complex pathophysiological process. Current research has suggested that energy metabolism disorders, of which the abnormal consumption of fatty acids is closely related, compose the main pathological basis for myocardial I/R injury. Lipid droplets (LD) are critical regulators of lipid metabolism by LD-associated proteins. Among the lipid droplet proteins, the perilipin family members regulate lipolysis and lipogenesis through different mechanisms. Plin5, an important perilipin protein, promotes LD generation and lowers fatty acid oxidation, thus protecting the myocardium from lipotoxicity...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28213136/systematic-development-of-a-two-stage-fed-batch-process-for-lipid-accumulation-in-rhodotorula-glutinis
#11
Eric Lorenz, Dennis Runge, Anna-Maria Marbà-Ardébol, Maximilian Schmacht, Ulf Stahl, Martin Senz
The application of oleaginous yeast cells as feed supplement, for instance in aqua culture, can be a meaningful alternative for fish meal and oil additives. Therefore, a two-stage fed-batch process split into growth and lipogenesis phase was systematically developed to enrich the oleaginous yeast Rhodotorula glutinis Rh-00301 with high amounts of lipids at industrial relevant biomasses. Thereby, the different carbon sources glucose, sucrose and glycerol were investigated concerning their abilities to serve as a suited raw material for growth and/or lipid accumulation...
February 15, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28212548/branched-chain-amino-acids-prevent-hepatic-fibrosis-and-development-of-hepatocellular-carcinoma-in-a-non-alcoholic-steatohepatitis-mouse-model
#12
Kai Takegoshi, Masao Honda, Hikari Okada, Riuta Takabatake, Naoto Matsuzawa-Nagata, Jean S Campbell, Masashi Nishikawa, Tetsuro Shimakami, Takayoshi Shirasaki, Yoshio Sakai, Taro Yamashita, Toshinari Takamura, Takuji Tanaka, Shuichi Kaneko
Oral supplementation with branched-chain amino acids (BCAA; leucine, isoleucine, and valine) in patients with liver cirrhosis potentially suppresses the incidence of hepatocellular carcinoma (HCC) and improves event-free survival. However, the detailed mechanisms of BCAA action have not been fully elucidated. BCAA were administered to atherogenic and high-fat (Ath+HF) diet-induced nonalcoholic steatohepatitis (NASH) model mice. Liver histology, tumor incidence, and gene expression profiles were evaluated. Ath+HF diet mice developed hepatic tumors at a high frequency at 68 weeks...
February 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28212318/alcohol-%C3%A2-adipose%C3%A2-tissue%C3%A2-and%C3%A2-lipid%C3%A2-dysregulation
#13
Jennifer L Steiner, Charles H Lang
Chronic alcohol consumption perturbs lipid metabolism as it increases adipose tissue lipolysis and leads to ectopic fat deposition within the liver and the development of alcoholic fatty liver disease. In addition to the recognition of the role of adipose tissue derived fatty acids in liver steatosis, alcohol also impacts other functions of adipose tissue and lipid metabolism. Lipid balance in response to long-term alcohol intake favors adipose tissue loss and fatty acid efflux as lipolysis is upregulated and lipogenesis is either slightly decreased or unchanged...
February 16, 2017: Biomolecules
https://www.readbyqxmd.com/read/28210913/dietary-and-commercialized-fructose-sweet-or-sour
#14
REVIEW
Aslihan Yerlikaya, Tuncay Dagel, Christopher King, Masanari Kubawara, Miguel A Lanaspa, Ana Andres-Hernando, Adrian Covic, Jacek Manitius, Alan A Sag, Mehmet Kanbay
Metabolic syndrome and diabetes are main health problems of modern life in the twenty-first century. Alarming ratios of global prevalence lead to conduct more and more researches about etiological factors and pathogenesis. Disease mechanism is elementary for advancing more efficient and practicable treatment methods. Concurrent increase in both fructose consumption with Western diet and metabolic syndrome has revealed fructose hypothesis that suggests fructose as one of etiological factor of metabolic syndrome (insulin resistance, central obesity, hypertension, etc...
February 16, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28209758/atorvastatin-decreases-hbx-induced-phospho-akt-in-hepatocytes-via-p2x-receptors
#15
Aram Ghalali, Javier Martin-Renedo, Johan Hogberg, Ulla Stenius
: Hepatocellular carcinoma (HCC) is rated as the fifth most common malignancy and third in cancer related deaths worldwide. Statins, HMG-CoA reductase inhibitors, are potent cholesterol lowering drugs and recent epidemiological evidence suggests that statins prevent aggressive HCC development. Previous experiments revealed that statins downregulate phosphorylated Akt (pAkt). Here, it is demonstrated that atorvastatin decreases nuclear pAkt levels in pancreatic and lung cancer cell lines within minutes and this rapid effect is mediated by the purinergic P2X receptors...
February 16, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28209220/very-low-density-lipoprotein-associated-apolipoproteins-predict-cardiovascular-events-and-are-lowered-by-inhibition%C3%A2-of%C3%A2-apoc-iii
#16
Raimund Pechlaner, Sotirios Tsimikas, Xiaoke Yin, Peter Willeit, Ferheen Baig, Peter Santer, Friedrich Oberhollenzer, Georg Egger, Joseph L Witztum, Veronica J Alexander, Johann Willeit, Stefan Kiechl, Manuel Mayr
BACKGROUND: Routine apolipoprotein (apo) measurements for cardiovascular disease (CVD) are restricted to apoA-I and apoB. Here, the authors measured an unprecedented range of apolipoproteins in a prospective, population-based study and relate their plasma levels to risk of CVD. OBJECTIVES: This study sought to measure apolipoproteins directly by mass spectrometry and compare their associations with incident CVD and to obtain a system-level understanding of the correlations of apolipoproteins with the plasma lipidome and proteome...
February 21, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28208713/effects-of-an-encapsulated-fruit-and-vegetable-juice-concentrate-on-obesity-induced-systemic-inflammation-a-randomised-controlled-trial
#17
Evan J Williams, Katherine J Baines, Bronwyn S Berthon, Lisa G Wood
Phytochemicals from fruit and vegetables reduce systemic inflammation. This study examined the effects of an encapsulated fruit and vegetable (F&V) juice concentrate on systemic inflammation and other risk factors for chronic disease in overweight and obese adults. A double-blinded, parallel, randomized placebo-controlled trial was conducted in 56 adults aged ≥40 years with a body mass index (BMI) ≥28 kg/m². Before and after eight weeks daily treatment with six capsules of F&V juice concentrate or placebo, peripheral blood gene expression (microarray, quantitative polymerase chain reaction (qPCR)), plasma tumour necrosis factor (TNF)α (enzyme-linked immunosorbent assay (ELISA)), body composition (Dual-energy X-ray absorptiometry (DEXA)) and lipid profiles were assessed...
February 8, 2017: Nutrients
https://www.readbyqxmd.com/read/28207743/lipidomic-approach-for-stratification-of-acute-myeloid-leukemia-patients
#18
Adam Stefanko, Christian Thiede, Gerhard Ehninger, Kai Simons, Michal Grzybek
The pathogenesis and progression of many tumors, including hematologic malignancies is highly dependent on enhanced lipogenesis. De novo fatty-acid synthesis permits accelerated proliferation of tumor cells by providing membrane components but these may also alter physicochemical properties of lipid bilayers, which can impact signaling or even increase drug resistance in cancer cells. Cancer type-specific lipid profiles would permit us to monitor and interpret actual effects of lipid changes, potential fingerprints of individual tumors to be explored as diagnostic markers...
2017: PloS One
https://www.readbyqxmd.com/read/28197827/phloretin-prevents-high-fat-diet-induced-obesity-and-improves-metabolic-homeostasis
#19
Sary Alsanea, Mingming Gao, Dexi Liu
Reactive oxygen species generated as a by-product in metabolism play a central role in the development of obesity and obesity-related metabolic complications. The objective of the current study is to explore the possibility to block obesity and improve metabolic homeostasis via phloretin, a natural antioxidant product from apple tree leaves and Manchurian apricot. Both preventive and therapeutic activities of phloretin were assessed using a high-fat diet-induced obesity mouse model. Phloretin was injected intraperitoneally twice weekly into regular and obese mice fed a high-fat diet...
February 14, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28195222/rna-seq-based-detection-of-differentially-expressed-genes-in-the-skeletal-muscle-of-duroc-pigs-with-distinct-lipid-profiles
#20
T F Cardoso, A Cánovas, O Canela-Xandri, R González-Prendes, M Amills, R Quintanilla
We have used a RNA-seq approach to investigate differential expression in the skeletal muscle of swine (N = 52) with divergent lipid profiles i.e. HIGH (increased intramuscular fat and muscle saturated and monounsaturated fatty acid contents, higher serum lipid concentrations and fatness) and LOW pigs (leaner and with an increased muscle polyunsaturated fatty acid content). The number of mRNAs and non-coding RNAs (ncRNAs) expressed in the porcine gluteus medius muscle were 18,104 and 1,558, respectively...
February 14, 2017: Scientific Reports
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