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https://www.readbyqxmd.com/read/28647371/triglyceride-synthesis-in-hepatocytes-isolated-from-rats-fed-a-low-protein-diet-is-enhanced-independently-of-upregulation-of-insulin-signaling
#1
Yusuke Taguchi, Yuka Toyoshima, Reiko Tokita, Hisanori Kato, Shin-Ichiro Takahashi, Shiro Minami
It is known that protein malnutrition develops fatty liver in rats. However, the mechanisms by which protein malnutrition enhances lipid accumulation in the liver are not fully understood. Our previous studies have demonstrated that protein malnutrition upregulates insulin signaling with an increase in TG levels in rat livers. Here, we examined whether the upregulated insulin signaling contributes to an enhancement of TG accumulation under protein malnutrition. As it is difficult to analyze insulin-induced hepatic TG synthesis in vivo, the isolated hepatocytes derived from rats fed a low-protein diet were used...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647361/apolipoprotein-o-expression-in-mouse-liver-enhances-hepatic-lipid-accumulation-by-impairing-mitochondrial-function
#2
Feng Tian, Chen-Lu Wu, Bi-Lian Yu, Ling Liu, Jia-Rui Hu
Apolipoprotein O (ApoO) was recently observed in the cellular mitochondrial inner membrane, which plays a role in mitochondrial function and is associated with myocardiopathy. Empirical information on the physiological functions of apoO is therefore limited. In this study, we aimed to elucidate the effect of apoO on hepatic fatty acid metabolism. An adenoviral vector expressing hApoO was constructed and introduced into chow diet and high-fat diet induced mice and the L02 human hepatoma cell line. High levels of hApoO mRNA and protein were detected in the liver, and the expression of lipid metabolism genes was significantly altered compared with negative controls...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647180/helianthus-tuberosus-jerusalem-artichoke-tubers-improve-glucose-tolerance-and-hepatic-lipid-profile-in-rats-fed-a-high-fat-diet
#3
Naoto Okada, Shinya Kobayashi, Kouta Moriyama, Kohsuke Miyataka, Shinji Abe, Chiemi Sato, Kazuyoshi Kawazoe
OBJECTIVES: To analyze the effects of feeding Helianthus tuberosus (HT) tubers on glucose tolerance and lipid profile in rats fed a high-fat diet (HFD). METHODS: A normal HFD or HFD including 10 w/w% HT tubers (HFD + HT) was fed to F334/Jcl rats. After 10 weeks, organ weights, glucose tolerance, and lipid profile were analyzed. RESULTS: The body weight, liver weight, and epidermal fat content in the HFD group were higher than those of the normal group, and similar to those of the HFD + HT group...
May 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28646706/corn-silk-maysin-ameliorates-obesity-in-vitro-and-in-vivo-via-suppression-of-lipogenesis-differentiation-and-function-of-adipocytes
#4
Chang Won Lee, Jeong Yeon Seo, Sun-Lim Kim, Jisun Lee, Ji Won Choi, Yong Il Park
Present study was aimed to investigate the potential anti-obesity effects of maysin, a major flavonoid of corn silk, in vitro and in vivo using 3T3-L1 preadipocyte cells and C57BL/6 mice. Maysin decreased the levels of intracellular lipid droplets and triglycerides (TG), and down-regulated the protein expression levels of C/EBP-β, C/EBP-α, PPAR-γ, and aP2 in 3T3-L1 preadipocyte cells, suggesting that maysin inhibits lipid accumulation and adipocyte differentiation. In addition, maysin was shown to induce the apoptotic cell death in 3T3-L1 preadipocyte cells via activation of caspase cascades and mitochondrial dysfunction, which may ultimately lead to reduction of adipose tissue mass...
June 21, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28646531/morin-a-novel-lxr%C3%AE-%C3%AE-dual-antagonist-has-potent-therapeutic-efficacy-for-nonalcoholic-fatty-liver-diseases
#5
Ming Gu, Yu Zhang, Chuhe Liu, Dongshan Wang, Li Feng, Shengjie Fan, Baican Yang, Qingchun Tong, Guang Ji, Cheng Huang
BACKGROUND AND PURPOSE: Morin is a natural occurring flavonoid in many dietary plants and has a wide range of beneficial effects on metabolism; however, the mechanism underlying its action remains elusive. EXPERIMENTAL APPROACH: Reporter assay and the Time-Resolved Fluorescence Resonance Energy Transfer assay were used to identify morin as a dual antagonist of LXRα and LXRβ. High fat-diet mixed with morin (100 mg/100 g diet) was administrated to high-fat diet-induced obese or LXRβ(-/-) mice combining with Western blot and RT-PCR analysis to evaluate the pharmacological effect and mechanism of morin treatment...
June 23, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28646516/tofacitinib-restores-the-inhibition-of-reverse-cholesterol-transport-induced-by-inflammation-understanding-the-lipid-paradox-associated-with-rheumatoid-arthritis
#6
S Pérez-Baos, J I Barrasa, P Gratal, A Larrañaga-Vera, I Prieto-Potin, G Herrero-Beaumont, R Largo
BACKGROUND AND PURPOSE: Patients with active rheumatoid arthritis (RA) have increased cardiovascular mortality, paradoxically associated with reduced circulating lipid levels. The Janus kinase (Jak) inhibitor tofacitinib ameliorates systemic and joint inflammation in RA with a concomitant increase in serum lipids. We analyzed the effect of tofacitinib on the lipid profile of hyperlipidemic rabbits with chronic arthritis (CA) and on the regulation of reverse cholesterol transport (RCT) during chronic inflammation...
June 23, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28646459/silymarin-inhibits-adipogenesis-in-the-adipocytes-in-grass-carp-ctenopharyngodon-idellus-in-vitro-and-in-vivo
#7
Peizhen Xiao, Zhou Yang, Jian Sun, Jingjing Tian, Zhiguang Chang, Xuexian Li, Baotong Zhang, Yuantu Ye, Hong Ji, Ermeng Yu, Jun Xie
In this study, two experiments were performed to explore the function of silymarin in adipogenesis in grass carp (Ctenopharyngodon idellus) using in vitro and in vivo models. In experiment 1, differentiated grass carp pre-adipocytes were treated with silymarin for 6 days. Treatment with 100 μg mL(-1)silymarin (SM100 group) significantly reduced triglyceride accumulation at day 6. The adipogenic gene expression levels of PPARγ, C/EBPα, SREBP1c, FAS, SCD1, and LPL, and the protein expression level of PPARγ were significantly down-regulated in the SM100 group...
June 23, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28646016/tshb-mrna-is-linked-to-cholesterol-metabolism-in-adipose-tissue
#8
José María Moreno-Navarrete, María Moreno, Francisco Ortega, Gemma Xifra, Shangyu Hong, John M Asara, José C E Serrano, Mariona Jové, Pavlos Pissios, Matthias Blüher, Wifredo Ricart, Manuel Portero-Otin, José Manuel Fernández-Real
Subclinical hypothyroidism is known to be associated with increased serum cholesterol. Since thyroid-stimulating hormone (TSH) exerts an inductor effect on cholesterol biosynthesis, we aimed to investigate the relationship between TSH mRNA and cholesterol metabolism in human adipose tissue (AT). Cross-sectionally, AT TSH-β (TSHB) mRNA was evaluated in 4 independent cohorts in association with serum total and LDL cholesterol, and AT lipidomics. Longitudinally, the effects of statins and of diet and exercise on AT TSHB mRNA were also examined...
June 23, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28645949/double-blind-randomised-controlled-trial-of-the-independent-and-synergistic-effect-of-spirulina-maxima-with-exercise-isese-on-general-fitness-lipid-profile-and-redox-status-in-overweight-and-obese-subjects-study-protocol
#9
Marco Antonio Hernández-Lepe, José Alberto López-Díaz, Laura Alejandra de la Rosa, Rosa Patricia Hernández-Torres, Abraham Wall-Medrano, Marco Antonio Juarez-Oropeza, José Pedraza-Chaverri, Rene Urquidez-Romero, Arnulfo Ramos-Jiménez
INTRODUCTION: In order to reduce cardiovascular disease risk factors, a healthy diet must include dietary antioxidants from different sources (eg, Spirulina maxima) and regular practice of exercise should be promoted. There is some evidence from animal studies that S. maxima and exercise decrease cardiovascular disease risks factors. However, very few studies have proved the independent or synergistic effect of S. maxima plus exercise in humans. This study attempts to address the independent and synergistic effects in overweight and obese subjects participating in a systematic physical exercise programme at moderate intensity on general fitness, plasma lipid profile and antioxidant capacity...
June 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28645790/vitamin-e-deficiency-during-embryogenesis-in-zebrafish-causes-lasting-metabolic-and-cognitive-impairments-despite-refeeding-adequate-diets
#10
Melissa McDougall, Jaewoo Choi, Lisa Truong, Robert Tanguay, Maret G Traber
Vitamin E (α-tocopherol; VitE) is a lipophilic antioxidant required for normal embryonic development in vertebrates, but the long-term effects of embryonic VitE deficiency, and whether they are ameliorated by feeding VitE-adequate diets, remain unknown. We addressed these questions using a zebrafish (Danio rerio) model of developmental VitE deficiency followed by dietary remediation. Adult zebrafish maintained on VitE-deficient (E-) or sufficient (E+) diets were spawned to obtained E- and E+ embryos, respectively, which we evaluated up to 12 days post-fertilization (dpf)...
June 20, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28645653/catalase-overexpression-modulates-metabolic-parameters-in-a-new-stress-less-leptin-deficient-mouse-model
#11
Deborah L Amos, Tanner Robinson, Melissa B Massie, Carla Cook, Alexis Hoffsted, Courtney Crain, Nalini Santanam
Oxidative stress plays a key role in obesity by modifying the function of important biological molecules, thus altering obesogenic pathways such as glucose and lipid signaling. Catalase, is an important endogenous antioxidant enzyme that catabolizes hydrogen peroxide produced by the dismutation of superoxide. Recent studies have shown knockdown of catalase exacerbates insulin resistance and leads to obesity. We hypothesized that overexpressing catalase in an obese mouse will modulate obesogenic pathways and protect against obesity...
June 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28645103/colxv-promotes-adipocyte-differentiation-via-inhibiting-dna-methylation-and-camp-pka-pathway-in-mice
#12
Guannv Liu, Meihang Li, Yatao Xu, Song Wu, Muhammad Saeed, Chao Sun
Extracellular matrix (ECM), as an essential component of adipose tissue, not only provides mechanical support for adipocyte growth, but also participates in ECM-adipocyte communication via various secreted proteins, including highly enriched collagens. Collagen XV (ColXV) is a secreted non-fibrillar collagen within ECM Basement Membrane (BM) zones and well recognized as a tumor suppressor. However, the role of ColXV in adipose tissue is still unknown. In this study, high fat diet (HFD) fed mice were used as obese model, in which we deeply investigated the interaction between ColXV and adipocyte differentiation or adipose metabolism...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28644700/intermittent-ischemic-preconditioning-protects-against-hepatic-ischemia-reperfusion-injury-and-extensive-hepatectomy-in-steatotic-rat-liver
#13
Nikolaos Sikalias, Theodore Karatzas, Konstantinos Alexiou, Lamprini Mountzalia, Maria Demonakou, Ioannis D Kostakis, Argyro Zacharioudaki, Apostolos Papalois, Gregory Kouraklis
BACKGROUND: Hepatic steatosis causes severe liver damage and has deleterious effects when associated with ischemia-reperfusion mechanisms. Ischemic preconditioning (IPC) protects lean liver against prolonged ischemia by improving micro-circulation and reducing lipid peroxidation. We investigated the effect of intermittent IPC on liver ischemia-reperfusion injury (IRI) and extensive hepatectomy in severe hepatic steatosis. METHODS: Severe hepatic steatosis was performed by 12-14 weeks of choline-free diet in 108 Wistar rats...
June 23, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28644409/quercetin-protects-obesity-induced-hypothalamic-inflammation-by-reducing-microglia-mediated-inflammatory-responses-via-ho-1-induction
#14
Jihyeon Yang, Chu-Sook Kim, Thai Hien Tu, Min-Seon Kim, Tsuyoshi Goto, Teruo Kawada, Myung-Sook Choi, Taesun Park, Mi-Kyung Sung, Jong Won Yun, Suck-Young Choe, Jee Hye Lee, Yeonsoo Joe, Hye-Seon Choi, Sung Hoon Back, Hun Taeg Chung, Rina Yu
Obesity-induced hypothalamic inflammation is characterized by activation of microglia, which are resident macrophages of the central nervous system, and is implicated in the derangement of energy homeostasis, metabolic complications, and neurodegenerative diseases. Quercetin, a naturally occurring flavonoid, is known to protect against oxidative stress and inflammation-related metabolic complications. Here, we demonstrate that quercetin reduces obesity-induced hypothalamic inflammation by inhibiting microglia-mediated inflammatory responses, and the beneficial action of quercetin is associated with heme oxygenase (HO-1) induction...
June 23, 2017: Nutrients
https://www.readbyqxmd.com/read/28644081/effects-of-added-lipids-on-digestibility-and-nitrogen-balance-in-oiled-common-murres-uria-aalge-and-western-grebes-aechmophorus-occidentalis-fed-four-formulations-of-a-critical-care-diet
#15
Rebecca S Duerr, Kirk C Klasing
Nutritional support is a primary therapy administered to oiled animals during responses to oil spills, but data informing nutritional decision-making during events are limited. In this study, 44 common murres ( Uria aalge ) and 6 Western grebes ( Aechmophorus occidentalis ), naturally oiled by oceanic seeps off the coast of Ventura and Santa Barbara Counties, CA, USA, were assigned to 1 of 4 groups fed diets with varying levels (6.8% [no added oil], 11%, and 20%) and types (salmon, corn) of oil added to a partially purified basal diet...
June 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28643888/combination-of-citrus-polymethoxyflavones-green-tea-polyphenols-and-lychee-extracts-suppresses-obesity-and-hepatic-steatosis-in-high-fat-diet-induced-obese-mice
#16
Min-Hsiung Pan, Guliang Yang, Shiming Li, Ming-Yi Li, Mei-Ling Tsai, Jia-Ching Wu, Vladimir Badmaev, Chi-Tang Ho, Ching-Shu Lai
SCOPE: SlimTrym(®) is a formulated product composed of citrus polymethoxyflavones (PMFs), green tea extract and lychee extract. We investigated the effect of dietary SlimTrym(®) on diet-induced obesity and associated non-alcoholic fatty liver disease (NAFLD) in mice. METHODS AND RESULTS: Male C57BL/6 mice were fed a normal diet (ND), high fat diet (HFD) or HFD containing 0.1% or 0.5% SlimTrym(®) for sixteen weeks. Dietary SlimTrym(®) significantly reduced weight gain and relative perigonadal, retroperitoneal, mesenteric fat weight as well as the size of adipocyte in HFD-fed mice...
June 23, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28643677/modulator-effect-of-watercress-against-cyclophosphamide-induced-oxidative-stress-in-mice
#17
Natalia A Casanova, María Fernanda Simoniello, Marcela Mabel López Nigro, Marta A Carballo
Watercress (Nasturtium officinale, Cruciferae; W. Aiton) is a vegetable widely consumed in our country, with nutritional and potentially chemopreventive properties. Previous reports from our laboratory demonstrated the protective effect of watercress juice against DNA damage induced by cyclophosphamide in vivo. In this study, we evaluated the in vivo effect of cress plant on the oxidative stress in mice. Animals were treated by gavage with different doses of watercress juice (0.5 and 1g/kg body weight) for 15 consecutive days before intraperitoneal injection of cyclophosphamide (100 mg/kg body weight)...
2017: Medicina
https://www.readbyqxmd.com/read/28643621/linoleic-acid-%C3%AE-linolenic-acid-and-enterolactone-affect-lipid-oxidation-and-expression-of-lipid-metabolism-and-antioxidant-related-genes-in-hepatic-tissue-of-dairy-cows
#18
Émilie Fortin, Richard Blouin, Jérôme Lapointe, Hélène V Petit, Marie-France Palin
Although beneficial effects have been attributed to PUFA supplementation in high-yielding dairy cows, diets rich in PUFA may also increase oxidative stress in tissues such as the liver. To fully exploit the health benefits of PUFA, we believe that the addition of natural antioxidants could help in preventing oxidative damage. Using an in vitro precision-cut liver slices (PCLS) tissue culture system, we investigated the effects of different linoleic acid (LA, n-6):α-linolenic acid (ALA, n-3) ratios (LA:ALA ratio of 4, LA:ALA ratio of 15 and LA:ALA ratio of 25) in the presence or absence of the antioxidant enterolactone (ENL) on (1) the mRNA abundance of genes with key roles in hepatic lipid metabolism, oxidative stress response and inflammatory processes, (2) oxidative damages to lipids and proteins and (3) superoxide dismutase activity in early-lactating dairy cows...
May 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28643478/critical-role-of-tnf-inhibition-in-combination-therapy-for-elderly-mice-with-atherosclerosis
#19
Kyung-Yeon Park, Tae-Hwe Heo
We have previously shown that the combination of pravastatin and sarpogrelate is synergistically beneficial for atherosclerosis. In this study, we investigated whether the pravastatin-sarpogrelate combination was sufficient for treatment in an old mouse model of atherosclerosis or if additional intervention would be needed to address the newly included aging factor and its complex pathophysiological impact on the atherosclerogenic state. We added an anti-TNF biologic to the combination treatment cocktail because of the known pathologic roles of TNF in the aging process...
June 23, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28642009/mice-in-the-early-stage-of-liver-steatosis-caused-by-a-high-fat-diet-are-resistant-to-thioacetamide-induced-hepatotoxicity-and-oxidative-stress
#20
Jaeyong Lee, Takujiro Homma, Junichi Fujii
Lipogenesis is stimulated in the liver by an unfolded protein response (UPR) to endoplasmic reticulum stress under a variety of pathological conditions and results in the accumulation of lipids in hepatocytes. Assuming that UPR is a protective mechanism against stress, we hypothesized that the accumulated lipids might have a beneficial function. We prepared mice with fatty livers by feeding two types of high-calorie diets; a lard-rich high-calorie diet (LHD) or a menhaden oil-containing high-calorie diet (MHD), for two weeks and treated them, as well as control diet (CD)-fed mice, with thioacetamide (TAA), a liver toxicant...
June 19, 2017: Toxicology Letters
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