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https://www.readbyqxmd.com/read/29036927/chinese-olive-canarium-album-l-fruit-extract-attenuates-metabolic-dysfunction-in-diabetic-rats
#1
Yu-Te Yeh, An-Na Chiang, Shu-Chen Hsieh
Hyperglycemia and dysregulation of lipid metabolism play a crucial role in metabolic dysfunction. The aims of present study were to evaluate the ameliorative effect of the ethyl acetate fraction of Chinese olive fruit extract (CO-EtOAc) on high-fat diet (HFD) and streptozotocin (STZ)-induced diabetic rats. CO-EtOAc, rich in gallic acid and ellagic acid, could markedly decreased the body weight and epididymal adipose mass. In addition, CO-EtOAc increased serum HDL-C levels, hepatic GSH levels, and antioxidant enzyme activities; lowered blood glucose, serum levels of total cholesterol (TC), triglycerides (TG), bile acid, and tumor necrosis factor alpha (TNFα); and reduced TC and TG in liver...
October 15, 2017: Nutrients
https://www.readbyqxmd.com/read/29028359/complex-interaction-between-circadian-rhythm-and-diet-on-bile-acid-homeostasis-in-male-rats
#2
Hannah M Eggink, Johanneke E Oosterman, Paul de Goede, Emmely M de Vries, Ewout Foppen, Martijn Koehorst, Albert K Groen, Anita Boelen, Johannes A Romijn, Susanne E la Fleur, Maarten R Soeters, Andries Kalsbeek
Desynchronization between the master clock in the brain, which is entrained by (day) light, and peripheral organ clocks, which are mainly entrained by food intake, may have negative effects on energy metabolism. Bile acid metabolism follows a clear day/night rhythm. We investigated whether in rats on a normal chow diet the daily rhythm of plasma bile acids and hepatic expression of bile acid metabolic genes is controlled by the light/dark cycle or the feeding/fasting rhythm. In addition, we investigated the effects of high caloric diets and time-restricted feeding on daily rhythms of plasma bile acids and hepatic genes involved in bile acid synthesis...
October 13, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29022907/p38%C3%AE-mapk-antagonizing-jnk-to-control-the-hepatic-fat-accumulation-in-pediatric-patients-onset-intestinal-failure
#3
Yongtao Xiao, Jun Wang, Weihui Yan, Kejun Zhou, Yi Cao, Wei Cai
The p38α mitogen-activated protein kinase (MAPK) has been related to gluconeogenesis and lipid metabolism. However, the roles and related mechanisms of p38α MAPK in intestinal failure (IF)-associated liver steatosis remained poor understood. Here, our experimental evidence suggested that p38α MAPK significantly suppressed the fat accumulation in livers of IF patients mainly through two mechanisms. On the one hand, p38α MAPK increased hepatic bile acid (BA) synthesis by upregulating the expression of the rate-limiting enzyme cholesterol 7-α-hydroxylase (CYP7A1) and peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), which in turn activated the transcription of the CYP7A1...
October 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28987596/computational-discovery-and-experimental-verification-of-farnesoid-x-receptor-agonist-auraptene-to-protect-against-cholestatic-liver-injury
#4
Xiaoguang Gao, Ting Fu, Changyuan Wang, Chenqing Ning, Yulong Kong, Zhihao Liu, Huijun Sun, Xiaodong Ma, Kexin Liu, Qiang Meng
Recently obeticholic acid (OCA) which is a farnesoid X receptor (FXR) agonist was approved by FDA to treat cholestatic liver diseases, which provided us a novel therapeutic strategy against cholestasis. Herein, we used a novel computational strategy with two-dimensional virtual screening for FXR agonists. For the first time, we found that auraptene (AUR), a natural product, can activate FXR to exert hepatoprotective effect against cholestatic liver injury in vivo and in vitro. Importantly, AUR was found to significantly decrease the mortality of cholestatic mice...
October 4, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28987369/the-regulatory-effects-of-fish-oil-and-chitosan-on-hepatic-lipogenic-signals-in-high-fat-diet-induced-obese-rats
#5
Chen-Yuan Chiu, Tien-Chia Chang, Shing-Hwa Liu, Meng-Tsan Chiang
The present study investigated the regulatory effects of fish oil and chitosan on the signals of hepatic lipid metabolism and the postulated mechanism in high-fat diet-induced obese rats. Diet supplementation of chitosan and fish oil efficiently suppressed the increased weights in body and livers of high-fat diet-fed rats. Supplementation of chitosan and fish oil significantly decreased the activities of hepatic lipid biosynthesis-related enzymes and efficiently regulated plasma lipoprotein homeostasis. Both chitosan and fish oil significantly ameliorated the alterations in the protein expressions of hepatic lipogenic transcription factors (LXRα and PPARα), and could also significantly regulate the downstream hepatic lipogenic genes (FAS, HMGCR, CYP7A1, FATP, FABP, AOX, and ABCA) expressions in high-fat diet-fed rats...
October 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28984832/the-role-of-omega-3-fatty-acids-in-reverse-cholesterol-transport-a-review
#6
REVIEW
Alex Pizzini, Lukas Lunger, Egon Demetz, Richard Hilbe, Guenter Weiss, Christoph Ebenbichler, Ivan Tancevski
The beneficial effects of omega-3 polyunsaturated fatty acids (n-3 PUFAs) on cardiovascular disease have been studied extensively. However, it remains unclear to what extent n-3 PUFAs may impact Reverse Cholesterol Transport (RCT). RCT describes a mechanism by which excess cholesterol from peripheral tissues is transported to the liver for hepatobiliary excretion, thereby inhibiting foam cell formation and the development of atherosclerosis. The aim of this review is to summarize the literature and to provide an updated overview of the effects of n-3 PUFAs on key players in RCT, including apoliprotein AI (apoA-I), ATP-binding cassette transporter A1 (ABCA1), ABCG1, apoE, scavenger receptor class B type I (SR-BI), cholesteryl ester transfer protein (CETP), low-density lipoprotein receptor (LDLr), cholesterol 7 alpha-hydroxylase (CYP7A1) and ABCG5/G8...
October 6, 2017: Nutrients
https://www.readbyqxmd.com/read/28973556/clofibrate-decreases-bile-acids-in-livers-of-male-mice-by-increasing-biliary-bile-acid-excretion-in-a-ppar%C3%AE-dependent-manner
#7
Youcai Zhang, Andrew J Lickteig, Iván L Csanaky, Curtis D Klaassen
Fibrates and their receptor, namely peroxisome proliferator-activated receptor α (PPARα), have been reported to regulate bile acid (BA) synthesis and transport. However, the effect of fibrate treatment and PPARα activation on BA homeostasis remains controversial. In the present study, both wild-type (WT) and PPARα-null male mice were treated with clofibrate (CLOF) for 4 days to evaluate the effects of short-term PPARα activation on bile acid (BA) homeostasis. While a decrease in total BAs was observed in livers of CLOF-treated WT mice, it was not observed in PPARα-null mice...
September 13, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28969019/repression-of-intestinal-transporters-and-fxr-fgf15-signaling-explains-bile-acids-dysregulation-in-experimental-colitis-associated-colon-cancer
#8
Lijuan Cao, Yuan Che, Tuo Meng, Shanshan Deng, Jun Zhang, Min Zhao, Wanfeng Xu, Dandan Wang, Zhichen Pu, Guangji Wang, Haiping Hao
Bile acids (BAs) are important endogenous signaling molecules that play vital roles in the pathological development of various diseases including colitis-associated cancer (CAC). BAs were previously found dysregulated under conditions of CAC; however, the exact patterns and underlying molecular mechanisms remain largely elusive. Based on the development of a method for comprehensive analysis of BAs, this study aims to elucidate the dysregulation patterns and involved mechanisms in a typical CAC model induced by azoxymethane (AOM)/dextran sodium sulfate (DSS)...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28935756/perinatal-hypercholesterolemia-exacerbates-atherosclerosis-lesions-in-offspring-by-altering-metabolism-of-trimethylamine-n-oxide-and-bile-acids
#9
Charlotte Trenteseaux, Anh-Thu Gaston, Audrey Aguesse, Guillaume Poupeau, Pierre de Coppet, Ramaroson Andriantsitohaina, Jamila Laschet, Valérie Amarger, Michel Krempf, Estelle Nobecourt-Dupuy, Khadija Ouguerram
OBJECTIVE: Experimental studies suggest that maternal hypercholesterolemia may be relevant for the early onset of cardiovascular disease in offspring. We investigated the effect of perinatal hypercholesterolemia on the atherosclerosis development in the offspring of apolipoprotein E-deficient mice and the underlying mechanism. APPROACH AND RESULTS: Atherosclerosis and related parameters were studied in adult male or female apolipoprotein E-deficient mice offspring from either normocholesterolemic or hypercholesterolemic mothers and normocholesterolemic fathers...
September 21, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28931545/regulation-of-genes-related-to-cholesterol-metabolism-in-rainbow-trout-oncorhynchus-mykiss-fed-plant-based-diet
#10
Tengfei Zhu, Genevieve Corraze, Elisabeth Plagnes-Juan, Edwige Quillet, Mathilde Dupont-Nivet, Sandrine Skiba-Cassy
Compared to fishmeal and fish oil, plant ingredients differ not only in the protein content, amino acid and fatty acid profiles but are also devoid of cholesterol, the major component of cell membrane and precursor of several bioactive compounds. Based on these nutritional characteristics, plant-based diets can affect fish physiology and cholesterol metabolism. In order to investigate the mechanisms underlying cholesterol homeostasis, rainbow trout were fed from 1g body weight during six months with a totally plant-based diet (V), a marine diet (M) and a marine restricted diet (MR) with feed intake adjusted to that of the V group...
September 20, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28921708/scopoletin-supplementation-ameliorates-steatosis-and-inflammation-in-diabetic-mice
#11
Ra-Yeong Choi, Ju Ri Ham, Hae-In Lee, Hyun Wook Cho, Myung-Sook Choi, Seok-Kyu Park, Jin Lee, Myung-Joo Kim, Kwon-Il Seo, Mi-Kyung Lee
Scopoletin is a bioactive component in many edible plants and fruits. This study investigated the effects of scopoletin on hepatic steatosis and inflammation in a high-fat diet fed type 1 diabetic mice by comparison with metformin. Scopoletin (0.01%, w/w) or metformin (0.5%, w/w) was provided with a high-fat diet to streptozotocin-induced diabetic mice for 11 weeks. Both scopoletin and metformin lowered blood glucose and HbA1c , serum ALT, TNF-α and IL-6 levels, glucose intolerance, and hepatic lipid accumulation compared with the diabetic control group...
September 18, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28915417/lc-ms-ms-quantification-of-7%C3%AE-hydroxy-4-cholesten-3-one-c4-in-rat-and-monkey-plasma
#12
Lijuan Kang, Thomas M Connolly, Naidong Weng, Wenying Jian
7α-hydroxy-4-cholesten-3-one (C4) is an oxidative enzymatic product of cholesterol metabolism via cholesterol 7α-hydroxylase, an enzyme also known as cholesterol 7-alpha-monooxygenase or cytochrome P450 7A1 (CYP7A1). C4 is a stable intermediate in the rate limiting pathway of bile acid biosynthesis. Previous studies showed that plasma C4 levels correlated with CYP7A1 enzymatic activity and could serve as a biomarker for bile acid synthesis. Here we developed and qualified a simple and robust high-throughput method using liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) to quantify C4 in rat and monkey plasma...
October 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28891815/rna-binding-protein-zfp36l1-maintains-posttranscriptional-regulation-of-bile-acid-metabolism
#13
Elizabeth J Tarling, Bethan L Clifford, Joan Cheng, Pauline Morand, Angela Cheng, Ellen Lester, Tamer Sallam, Martin Turner, Thomas Q de Aguiar Vallim
Bile acids function not only as detergents that facilitate lipid absorption but also as signaling molecules that activate the nuclear receptor farnesoid X receptor (FXR). FXR agonists are currently being evaluated as therapeutic agents for a number of hepatic diseases due to their lipid-lowering and antiinflammatory properties. FXR is also essential for maintaining bile acid homeostasis and prevents the accumulation of bile acids. Elevated bile acids activate FXR, which in turn switches off bile acid synthesis by reducing the mRNA levels of bile acid synthesis genes, including cholesterol 7α-hydroxylase (Cyp7a1)...
October 2, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28888833/iron-depletion-induces-hepatic-secretion-of-biliary-lipids-and-glutathione-in-rats
#14
Alena Prasnicka, Jolana Cermanova, Milos Hroch, Eva Dolezelova, Lucie Rozkydalova, Tomas Smutny, Alejandro Carazo, Jaroslav Chladek, Martin Lenicek, Petr Nachtigal, Libor Vitek, Petr Pavek, Stanislav Micuda
Iron depletion (ID) has been shown to induce the liver expression of Cyp7a1, the rate-limiting enzyme initiating conversion of cholesterol to bile acids (BA), although the effect on bile acids metabolism and bile production is unknown. Therefore, we investigated changes in bile secretion and BA synthesis during diet-induced iron depletion (ID) in rats. ID increased bile flow along with augmented biliary excretion of bile acids, glutathione, cholesterol and phospholipids. Accordingly, we found transcriptional upregulation of the Cyp7a1, Cyp8b1, and Cyp27a1 BA synthetic enzymes, as well as induction of the Abcg5/8 cholesterol transporters in ID rat livers...
December 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28877164/in-vivo-therapeutic-effect-of-combination-treatment-with-metformin-and-scutellaria-baicalensis-on-maintaining-bile-acid-homeostasis
#15
Kyungsun Han, Shambhunath Bose, Jing-Hua Wang, Soo-Kyoung Lim, Young-Won Chin, Young-Mi Kim, Han-Seok Choi, Hojun Kim
The radix of Scutellaria baicalensis (SB) is a herb widely used in traditional Chinese medicine to treat metabolic diseases. Several main components, including baicalin and wogonoside, possess anti-dyslipidemia, anti-obesity and anti-diabetic effects. We hypothesized that co-administration of SB extract and metformin exerts a better effect on obesity-induced insulin resistance and lipid metabolism than treatment with metformin alone. We compared the effect of metformin (100 mg/10 mL/kg/day) alone with co-administration of metformin (100 mg/5 mL/kg/day) and SB extract (200 mg/5 mL/kg/day) on Otsuka Long Evans Tokushima Fatty rats, a useful model of type II diabetes with obesity, and used Long-Evans Tokushima Otsuka rats as a control...
2017: PloS One
https://www.readbyqxmd.com/read/28874710/effects-of-toxic-microcystis-aeruginosa-on-the-silver-carp-hypophthalmichtys-molitrix-revealed-by-hepatic-rna-seq-and-mirna-seq
#16
Menghong Hu, Xiancheng Qu, Lisha Pan, Chunxue Fu, Peixuan Jia, Qigen Liu, Youji Wang
High-throughput sequencing was applied to analyze the effects of toxic Microcystis aeruginosa on the silver carp Hypophthalmichthys molitrix. Silver carps were exposed to two cyanobacteria species (toxic and non-toxic) for RNA-seq and miRNA-seq analysis. RNA-seq revealed that the liver tissue contained 105,379 unigenes. Of these genes, 143 were significantly differentiated, 82 were markedly up-regulated, and 61 were remarkably down-regulated. GO term enrichment analysis indicated that 35 of the 154 enriched GO terms were significantly enriched...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28865861/liver-transcriptome-analysis-reveals-important-factors-involved-in-the-metabolic-adaptation-of-the-transition-cow
#17
N-T Ha, C Drögemüller, C Reimer, F Schmitz-Hsu, R M Bruckmaier, H Simianer, J J Gross
During early lactation, dairy cows experience a severe metabolic load often resulting in the development of various diseases. The inevitable deficiency in nutrients and energy at the onset of lactation requires an optimal adaptation of the hepatic metabolism to overcome metabolic stress. We conducted a whole-liver transcriptome analysis for the transition cow to identify novel factors crucial for metabolic adaptation. Liver samples were obtained from 6 Red Holstein dairy cows (parity 2 to 7, mean ± standard deviation: 3...
November 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28863379/cassia-auriculata-flower-extract-attenuates-hyperlipidemia-in-male-wistar-rats-by-regulating-the-hepatic-cholesterol-metabolism
#18
Rajendran Vijayakumar, Vasanthi Nachiappan
Hyperlipidemia in the male albino Wistar rats was induced by Triton WR - 1339. The treatment of the hyperlipidemic animals with the ethanol extract of Cassia auriculata flower (Et-CAF) exhibited a dose dependent reduction in serum triacylglycerol, total cholesterol, low density lipoprotein (LDL), very low density lipoprotein (VLDL) similar to the hyperlipidemic animals treated with standard drug atorvastatin. Hyperlipidemia altered the protein and mRNA expression levels of the key genes (SREBP-1c, ACC1, SREBP-2, HMGR, HMGS, CYP7A1, and ABCA1) in lipid metabolism and the treatment with Et-CAF (300mg/kg b...
August 29, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28863273/2-3-4-5-tetrahydroxystilbene-2-0-%C3%AE-d-glycoside-attenuates-atherosclerosis-in-apolipoprotein-e-deficient-mice-role-of-reverse-cholesterol-transport
#19
Xuemeng Chen, Kun Tang, Yi Peng, Xiaole Xu
The aim of this study was to evaluate the potential effects of 2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucoside (TSG) on atherosclerotic plaque development in ApoE-/- mice, and explore the mechanisms involved. Our data showed that after eight weeks treatment, TSG ameliorated serum levels of total cholesterol, triglyceride and low density lipoprotein cholesterol and increased serum level of high density lipoprotein cholesterol in ApoE-/- mice. TSG suppressed hepatic steatosis, atherosclerotic lesion formation and macrophage foam cell formation in ApoE-/- mice...
September 1, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28843503/cyp7a1-is-continuously-increased-with-disrupted-fxr-mediated-feedback-inhibition-in-hypercholesterolemic-tallyho-jng-mice
#20
Eun-Ah Lee, Dong-In Lee, Hee-Yoen Kim, Sung-Hoon Ahn, Hye-Rim Seong, Won Hoon Jung, Ki Young Kim, Sungsub Kim, Sang Dal Rhee
TALLYHO/Jng (TH) mice reveal hypercholesterolemia at an early age before their plasma glucose levels have increased. The increased plasma cholesterol should be related to bile acids (BAs) metabolism, because cholesterol is the precursor of BAs and BAs change cholesterol metabolism in a feedback manner. We analyzed the BAs pool size, BAs composition, and expression levels of several proteins that have key roles in BAs synthesis, excretion, and reabsorption and compared them to those of C57BL/6 (B6) mice to study BAs metabolism in TH mice...
August 24, 2017: Biochimica et Biophysica Acta
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