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https://www.readbyqxmd.com/read/29152605/hepatic-natural-killer-t-cell-and-cd8-t-cell-signatures-in-mice-with-nonalcoholic-steatohepatitis
#1
Jashdeep Bhattacharjee, Michelle Kirby, Samir Softic, Lili Miles, Rosa-Maria Salazar-Gonzalez, Pranav Shivakumar, Rohit Kohli
Hepatic inflammation is a key pathological feature of Nonalcoholic Steatohepatitis (NASH). Natural Killer T-cells (NKT) and CD8+ T-cells are known to play an important role in obesity related adipose tissue inflammation. We hypothesized that these same inflammatory phenotypes would be present in progressive NASH. We used a previously established high fat high carbohydrate (HFHC) murine obesogenic diet model of progressive NASH to investigate the role of NKT cells and CD8+ T-cells in C57Bl6/J mice. Further, to better understand the impact of these cell populations; CD1d-deficient and CD8+ T-cell depleted mice were subjected to HFHC diet for 16 weeks...
June 2017: Hepatol Commun
https://www.readbyqxmd.com/read/29151385/the-compositional-and-metabolic-responses-of-gilthead-seabream-sparus-aurata-to-a-gradient-of-dietary-fish-oil-and-associated-n-3-long-chain-pufa-content
#2
Sam J S Houston, Vasileios Karalazos, John Tinsley, Mónica B Betancor, Samuel A M Martin, Douglas R Tocher, Oscar Monroig
The replacement of fish oil (FO) with vegetable oil (VO) in feed formulations reduces the availability of n-3 long-chain PUFA (LC-PUFA) to marine fish such as gilthead seabream. The aim of this study was to examine compositional and physiological responses to a dietary gradient of n-3 LC-PUFA. Six iso-energetic and iso-nitrogenous diets (D1-D6) were fed to seabream, with the added oil being a blend of FO and VO to achieve a dietary gradient of n-3 LC-PUFA. Fish were sampled after 4 months feeding, to determine biochemical composition, tissue fatty acid concentrations and lipid metabolic gene expression...
November 20, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/29149029/kappaphycus-alvarezii-as-a-food-supplement-prevents-diet-induced-metabolic-syndrome-in-rats
#3
Stephen Wanyonyi, Ryan du Preez, Lindsay Brown, Nicholas A Paul, Sunil K Panchal
The red seaweed, Kappaphycus alvarezii, was evaluated for its potential to prevent signs of metabolic syndrome through use as a whole food supplement. Major biochemical components of dried Kappaphycus are carrageenan (soluble fiber ~34.6%) and salt (predominantly potassium (K) 20%) with a low overall energy content for whole seaweed. Eight to nine week old male Wistar rats were randomly divided into three groups and fed for 8 weeks on a corn starch diet, a high-carbohydrate, high-fat (H) diet, alone or supplemented with a 5% (w/w) dried and milled Kappaphycus blended into the base diet...
November 17, 2017: Nutrients
https://www.readbyqxmd.com/read/29147968/effects-of-fasting-on-the-activities-and-mrna-expression-levels-of-lipoprotein-lipase-lpl-hormone-sensitive-lipase-hsl-and-fatty-acid-synthetase-fas-in-spotted-seabass-lateolabrax-maculatus
#4
Hongli Huang, Yu Zhang, Mingyue Cao, Liangyi Xue, Weiliang Shen
To investigate the effects of fasting on lipid metabolism in spotted seabass muscle and liver tissues, we analyzed mRNA levels and enzyme activities of lipoprotein lipase (LPL), hormone-sensitive lipase (HSL) and fatty acid synthetase (FAS), and the relationship among fat content, mRNA level, and enzyme activity during fasting of 35 days. The results showed that expressions of all the three genes were ubiquitous. During the fasting experiment, the hepatosomatic index (HSI) and fat content of muscle and liver tissues significantly decreased before 5 days of fasting (P < 0...
November 16, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29147490/hypolipidemic-effects-of-total-flavonoide-extracted-from-the-leaves-of-actinidiakolomikta-in-rats-fed-a-high-fat-diet
#5
Zhenxiang Yu, Huali Xu, Xiaofeng Yu, Dayun Sui, Guangzhu Lin
Objectives: This study was to investigate the antihyperlipidemic and antioxidant effect of total flavonoid extract from Actinidiakolomikta (TFAK) in hyperlipidemia induced by a high-fat diet. Materials and Methods: Male SD rats were randomly divided into 6 groups: normal group, model (hyperlipidemic diet) group, hyperlipedemic diet supplemented with TFAK (50, 100 and 200 mg/kg) and simvastatin (30 mg/kg) groups. The rats were administrated TFAK by oral for 28 days...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29143783/metformin-potentiates-the-benefits-of-dietary-restraint-a-metabolomic-study
#6
Marta Riera-Borrull, Anabel García-Heredia, Salvador Fernández-Arroyo, Anna Hernández-Aguilera, Noemí Cabré, Elisabet Cuyàs, Fedra Luciano-Mateo, Jordi Camps, Javier A Menendez, Jorge Joven
Prevention of the metabolic consequences of a chronic energy-dense/high-fat diet (HFD) represents a public health priority. Metformin is a strong candidate to be incorporated in alternative therapeutic approaches. We used a targeted metabolomic approach to assess changes related to the multi-faceted metabolic disturbances provoked by HFD. We evaluated the protective effects of metformin and explored how pro-inflammatory and metabolic changes respond when mice rendered obese, glucose-intolerant and hyperlipidemic were switched to diet reversal with or without metformin...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29143063/translating-aetiological-insight-into-sustainable-management-of-type-2-diabetes
#7
REVIEW
Roy Taylor, Alison C Barnes
Using a low-energy diet as a tool, it has been possible to elucidate the sequence of pathophysiological changes that lead to the onset of type 2 diabetes. Negative energy balance in type 2 diabetes causes a profound fall in liver fat content resulting in normalisation of hepatic insulin sensitivity within 7 days. As the period of negative energy balance extends and liver fat levels fall to low normal, the rate of export of triacylglycerol from the liver falls. Consequent to this, the raised pancreas fat content falls and in early type 2 diabetes, normal first-phase insulin secretion becomes re-established with normal plasma glucose control...
November 15, 2017: Diabetologia
https://www.readbyqxmd.com/read/29141135/the-fatty-acid-composition-of-lamb-liver-muscle-and-adipose-tissues-in-response-to-rumen-protected-conjugated-linoleic-acid-cla-supplementation-is-tissue-dependent
#8
Stefano Schiavon, Matteo Bergamaschi, Erika Pellattiero, Alberto Simonetto, Franco Tagliapietra
The tissue-specific response to rumen-protected conjugated linoleic acid supply (rpCLA) of liver, two muscles and three adipose tissues of heavy lambs was studied. Twenty-four lambs, 8 months old, divided into 4 groups of 6, were fed at libitum on a ration supplemented without or with a mixture of rpCLA. Silica and hydrogenated soybean oil was the rpCLA coating matrix. The lambs were slaughtered at 11 months of age. Tissues were collected and analysed for their FA profiles. The dietary rpCLA supplement had no influence on carcass fatness nor on the fat content of the liver and tissues, and had little influence on the FA profiles of these tissues...
November 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29140513/amino-acid-and-fatty-acid-levels-affect-hepatic-phosphorus-metabolite-content-in-metabolically-healthy-humans
#9
Sabine Kahl, Bettina Nowotny, Klaus Straßburger, Alessandra Bierwagen, Birgit Klüppelholz, Barbara Hoffmann, Guido Giani, Peter J Nowotny, Franziska Wallscheid, Erifili Hatziagelaki, Giovanni Pacini, Jong-Hee Hwang, Michael Roden
Objective: Hepatic energy metabolism negatively relates to insulin resistance and liver fat content in type 2 diabetes patients, but its role in metabolically healthy humans is unclear. We hypothesized that intrahepatocellular γ-adenosine triphosphate (γATP) and inorganic phosphate (Pi) concentrations exhibit similar associations with insulin sensitivity in non-diabetic non-obese volunteers. Research Design and methods: A total of 76 participants underwent a 4-point sampling 75-g OGTT as well as in vivo31P/1H magnetic resonance spectroscopy...
November 13, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29138227/the-hepatokines-fetuin-a-and-fetuin-b-are-up-regulated-in-the-state-of-hepatic-steatosis-and-may-differently-impact-on-glucose-homeostasis-in-humans
#10
Andreas Peter, Marketa Kovarova, Harald Staiger, Jürgen Machann, Fritz Schick, Alfred Königsrainer, Ingmar Koenigsrainer, Erwin D Schleicher, Andreas Fritsche, Hans-Ulrich Häring, Norbert Stefan
The liver is a central regulator of whole-body glucose and lipid homeostasis and hepatokines, like fetuin-A, have been identified as markers and mediators of fatty liver-induced cardiometabolic risk. The closely related protein fetuin-B was shown to be up-regulated in the fatty liver and to impact on glucose homeostasis in mice. In the present study we aimed to test the relevance of these findings in humans. In 55 subjects hepatic mRNA expression of both hepatokines, fetuin-A and fetuin-B, associated positively with liver triglyceride content, while only fetuin-A expression associated with the homeostatic model assessment of insulin resistance...
November 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29130078/hepatic-adaptations-to-a-high-fat-diet-in-the-mrl-mouse-strain-are-associated-with-an-inefficient-oxidative-phosphorylation-system
#11
Ahlke Heydemann, Magdalis González-Vega, Tirsit K Berhanu, Aaron J Mull, Ragav Sharma, Jenan Holley-Cuthrell
The MRL mice are resistant to a 12-week high fat diet (HFD) feeding protocol, with the proximal cause being an increased basal pAMPK(T172) expression in the skeletal muscle. Here, we test if this lack of pathology extends to the liver at both the tissue and cellular levels and its correlation to pAMPK(T172) levels. MRL and B6 mice were subjected to 12 weeks of diet intervention and tissues were either fixed for histology or snap-frozen for further processing (n= 3-6, per group). The HFD MRL mice remain insulin and glucose sensitive after 12 weeks of HFD...
December 2016: Jacobs J Diabetes Endocrinol
https://www.readbyqxmd.com/read/29129819/nicotinic-acetylcholine-receptor-%C3%AE-7-subunit-improves-energy-homeostasis-and-inhibits-inflammation-in-nonalcoholic-fatty-liver-disease
#12
Dong-Jie Li, Jian Liu, Xia Hua, Hui Fu, Fang Huang, Yi-Bo Fei, Wen-Jie Lu, Fu-Ming Shen, Pei Wang
OBJECTIVE: Nonalcoholic fatty liver disease (NAFLD) is one of the most common liver diseases worldwide; yet, the pathogenesis of the disorder is not completely understood. The nicotinic acetylcholine receptor α7 subunit (α7nAChR) plays an indispensable role in the vagus nerve-regulated cholinergic anti-inflammatory pathway. METHODS: In the present study, we investigated the key role of α7nAChR in NAFLD development. Male wild-type (WT) and α7nAChR knockout (α7nAChR(-/-)) mice were fed a normal chow or a high-fat diet (HFD) for 16 weeks to induce NAFLD...
November 9, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29120801/sardine-sardina-pilchardus-lipid-composition-does-it-change-after-one-year-in-captivity
#13
Narcisa Maria Bandarra, Ana Marçalo, Ana Rita Cordeiro, Pedro Pousão-Ferreira
Atlantic sardines (Sardina pilchardus) captured in the Portuguese mainland coast and maintained in captivity for one year feeding on artificial diet showed significant differences in muscle total lipids (TL) content in relation to wild fish (25% after one year compared to 14% in wild). Captive sardines had higher percentage of non-polar lipids (NPL) in their muscle, presented higher levels of 18:1n-9 and lower of 20:5n-3 and 22:6n-3 in NPL than those observed in wild fish. TL in the liver were not significantly different between captive and wild fish, but the NPL fraction of captive sardines presented higher levels of 22:6n-3 and 20:5n-3 than those registered in the wild...
April 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29118016/modelling-insulin-resistance-in-rodents-by-alterations-in-diet-what-have-high-fat-and-high-calorie-diets-revealed
#14
Lewin Small, Amanda E Brandon, Nigel Turner, Gregory J Cooney
For over half a century, researchers have been feeding different diets to rodents to examine the effects of macronutrients on whole body and tissue insulin action. During this period, the number of different diets and the source of macronutrients employed has grown dramatically. Due to the large heterogeneity in both the source and percentage of different macronutrients used for studies, it is not surprising that different high calorie diets do not produce the same changes in insulin action. Despite this, diverse high calorie diets continue to be employed in an attempt to generate a "generic" insulin resistance...
November 7, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29118014/exercise-training-reduces-intrahepatic-lipid-in-people-with-and-people-without-non-alcoholic-fatty-liver
#15
Bram Brouwers, Vera B Schrauwen-Hinderling, Tomas Jelenik, Anne Gemmink, Lauren M Sparks, Bas Havekes, Yvonne Bruls, Dennis Dahlmans, Michael Roden, Matthijs K C Hesselink, Patrick Schrauwen
Exercise training reduces intrahepatic lipid (IHL) content in people with elevated liver fat content. It is unclear, however, whether exercise training reduces IHL content in people with normal liver fat content. Here, we measured the effect of exercise training on IHL content in people with and people without non-alcohol fatty liver. We further measured changes in insulin sensitivity and hepatic energy metabolism. Eleven males with non-alcoholic fatty liver (NAFL) and 11 BMI-matched individuals without non-alcoholic fatty liver (CON) completed a 12-week supervised exercise training program...
November 7, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29115390/anti-hypoglycemic-and-hepatocyte-protective-effects-of-hyperoside-from-zanthoxylum-bungeanum-leaves-in-mice-with-high-carbohydrate-high-fat-diet-and-alloxan-induced-diabetes
#16
Yali Zhang, Mimi Wang, Huanhuan Dong, Xiaomin Yu, Jingfang Zhang
The development of diabetes mellitus (DM) is accompanied by hyperglycemia-induced oxidative stress. Hyperoside is a major bioactive component in Zanthoxylum bungeanum leaves (HZL) and is a natural antioxidant. However, the effects of HZL on DM and its mechanisms of action remain undefined. The present study evaluated the anti-hypoglycemic and hepatocyte-protective effects of HZL in mice with diabetes induced by a high-carbohydrate/high-fat diet (HFD) and alloxan. We also aimed to eludicate the underlying mechanisms...
October 25, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29109528/predictors-of-liver-fat-and-stiffness-in-non-alcoholic-fatty-liver-disease-nafld-an-11-year-prospective-study
#17
Susanna Lallukka, Sanja Sädevirta, Markus T Kallio, Panu K Luukkonen, You Zhou, Antti Hakkarainen, Nina Lundbom, Marju Orho-Melander, Hannele Yki-Järvinen
Liver fat can be non-invasively measured by proton magnetic resonance spectroscopy ((1)H-MRS) and fibrosis estimated as stiffness using transient elastography (FibroScan). There are no longitudinal data on changes in liver fat in Europids or on predictors of liver stiffness using these methods. We determined liver fat ((1)H-MRS) and clinical characteristics including features of insulin resistance at baseline and after a median follow-up period of 11.3 (range 7.3-13.4) years in 97 Finnish subjects. Liver stiffness was measured at 11...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29108812/correlation-of-brown-adipose-tissue-with-other-body-fat-compartments-and-patient-characteristics-a-retrospective-analysis-in-a-large-patient-cohort-using-pet-ct
#18
Cornelia Brendle, Matthias K Werner, Maria Schmadl, Christian la Fougère, Konstantin Nikolaou, Norbert Stefan, Christina Pfannenberg
RATIONALE AND OBJECTIVES: The objective of this study was to assess the relationship of brown adipose tissue (BAT) activity with different fat compartments of the body, body mass index (BMI), outdoor temperature, thyroid-stimulating hormone (TSH) levels, blood glucose, age, and sex in a large patient population using F-18-fluordesoxyglucose positron emission tomography-computer tomography (FDG-PET/CT) scans obtained under thermoneutral conditions. MATERIALS AND METHODS: FDG-PET/CT scans of 4852 patients were retrospectively analyzed for BAT activity...
November 3, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29107297/decreasing-cb1-receptor-signaling-in-kupffer-cells-improves-insulin-sensitivity-in-obese-mice
#19
Tony Jourdan, Sarah M Nicoloro, Zhou Zhou, Yuefei Shen, Jie Liu, Nathan J Coffey, Resat Cinar, Grzegorz Godlewski, Bin Gao, Myriam Aouadi, Michael P Czech, George Kunos
OBJECTIVE: Obesity-induced accumulation of ectopic fat in the liver is thought to contribute to the development of insulin resistance, and increased activity of hepatic CB1R has been shown to promote both processes. However, lipid accumulation in liver can be experimentally dissociated from insulin resistance under certain conditions, suggesting the involvement of additional mechanisms. Obesity is also associated with pro-inflammatory changes which, in turn, can promote insulin resistance...
November 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29107295/the-fgf21-response-to-fructose-predicts-metabolic-health-and-persists-after-bariatric-surgery-in-obese-humans
#20
Kasper W Ter Horst, Pim W Gilijamse, Ahmet Demirkiran, Bart A van Wagensveld, Mariette T Ackermans, Joanne Verheij, Johannes A Romijn, Max Nieuwdorp, Eleftheria Maratos-Flier, Mark A Herman, Mireille J Serlie
OBJECTIVE: Fructose consumption has been implicated in the development of obesity and insulin resistance. Emerging evidence shows that fibroblast growth factor 21 (FGF21) has beneficial effects on glucose, lipid, and energy metabolism and may also mediate an adaptive response to fructose ingestion. Fructose acutely stimulates circulating FGF21 consistent with a hormonal response. We aimed to evaluate whether fructose-induced FGF21 secretion is linked to metabolic outcomes in obese humans before and after bariatric surgery-induced weight loss...
November 2017: Molecular Metabolism
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