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Fat absorption, bile acids

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https://www.readbyqxmd.com/read/29037249/a-novel-self-micro-emulsifying-delivery-system-smeds-formulation-significantly-improves-the-fasting-absorption-of-epa-and-dha-from-a-single-dose-of-an-omega-3-ethyl-ester-concentrate
#1
Yan Qin, Hilde Nyheim, Else Marie Haram, Joseph M Moritz, Svein Olaf Hustvedt
BACKGROUND: Absorption of EPA and DHA from Omega-3-acid ethyl ester (EE) concentrate supplements occurs most efficiently when taken in context of a fatty meal; adequate fat intake is required to release bile salts that emulsify and pancreatic enzymes that digest omega-3-containing lipids in the intestine. Current guidelines recommend reduction in fat intake and therefore there is a need to optimize the absorption of Omega-3 in those consuming low-fat or no-fat meals. To this end, BASF has developed an Absorption Acceleration Technology, a novel self-micro-emulsifying delivery system (SMEDS) formulation of highly concentrated Omega-3-acid EE which enables rapid emulsification and microdroplet formation upon entering the aqueous environment of the gut therefore enhances the absorption...
October 16, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28986309/farnesoid-x-receptor-a-homeostat-for-hepatic-nutrient-metabolism
#2
REVIEW
Vittoria Massafra, Saskia van Mil
The Farnesoid X receptor (FXR) is a nuclear receptor activated by bile acids (BAs). BAs are amphipathic molecules that serve as fat solubilizers in the intestine under postprandial conditions. In the post-absorptive state, BAs bind FXR in the hepatocytes, which in turn provides feedback signals on BA synthesis and transport and regulates lipid, glucose and amino acid metabolism. Therefore, FXR acts as a homeostat of all three classes of nutrients, fats, sugars and proteins. Here we re-analyze the function of FXR in the perspective of nutritional metabolism, and discuss the role of FXR in liver energy homeostasis in postprandial, post-absorptive and fasting/starvation states...
October 3, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28894048/the-role-of-bile-acids-in-the-pathogenesis-of-bowel-diseases
#3
Magdalena Panek-Jeziorna, Agata Mulak
Bile acids not only play a cardinal role in the digestion and absorption of fat and fat-soluble vitamins, but also significantly affect gastrointestinal motor, sensory and secretory functions, intestinal barrier permeability and the regulation of the inflammatory response. The results of recent studies have revealed complex interactions between bile acids and the gut microbiota. In addition, bile acids also play a role of signaling molecules regulating the activity of lipid and glucose metabolic pathways, as well as a role of ligands for transcription factors...
August 24, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28885549/mdg-1-a-potential-regulator-of-ppar%C3%AE-and-ppar%C3%AE-ameliorates-dyslipidemia-in-mice
#4
Xu Wang, Linlin Shi, Sun Joyce, Yuan Wang, Yi Feng
Hyperlipidemia is a serious epidemic disease caused by lipid metabolism disorder, which is harmful to human health. MDG-1, a β-d-fructan polysaccharide extracted from Ophiopogon japonicus, has been shown to improve abnormal blood lipid levels and alleviate diabetes. However, the underlying mechanism on hyperlipidemia is largely unknown. In this study, male C57BL/6 mice were randomly separated into three groups, respectively: low-fat diet (Con), high-fat diet (HFD), and high-fat diet plus 5‰ MDG-1 (HFD + MDG-1)...
September 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28756207/pregnane-x-receptor-pxr-deficiency-improves-high-fat-diet-induced-obesity-via-induction-of-fibroblast-growth-factor-15-fgf15-expression
#5
Li-Yang Zhao, Jia-Yi Xu, Zhe Shi, Neal A Englert, Shu-Yun Zhang
Obesity has become a significant global health problem, and is a high risk factor for a variety of metabolic diseases. Fibroblast growth factor (FGF) 15 plays an important role in the regulation of metabolism. Xenobiotic-sensing nuclear receptors pregnane X receptor (PXR/NR1I2) and constitutive androstane receptor (CAR/NR1I3) play important roles in xenobiotic detoxification and metabolism, and also are involved in the regulation of energy metabolism. However, the effects that PXR and CAR have on the regulation of FGF15 are unknown...
October 15, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28549240/dietary-salecan-reverts-partially-the-metabolic-gene-expressions-and-nmr-based-metabolomic-profiles-from-high-fat-diet-induced-obese-rats
#6
Qi Sun, Minghui Li, Xiao Yang, Xi Xu, Junsong Wang, Jianfa Zhang
Previous studies suggest that dietary salecan (a water-soluble β-glucan) effectively reduces high-fat-diet-induced adiposity through disturbing bile-acid-promoted emulsification in mice. However, the effects of salecan on metabolic genes and metabolites involved in lipid accumulation are mostly unknown. Here, we confirmed that dietary 3% and 6% salecan for 4 weeks markedly decreased fat accumulation in liver and adipose tissue in high-fat-diet rats, displaying a decrease in mRNA levels of SREBP1-C, FAS, SCD1 and ACC1 involved in de novo lipogenesis and a reduction of levels of GPAT1, DGAT1 and DGAT2 related to triglyceride synthesis...
May 5, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28527154/structure-based-classification-for-bile-salt-export-pump-bsep-inhibitors-using-comparative-structural-modeling-of-human-bsep
#7
Sankalp Jain, Melanie Grandits, Lars Richter, Gerhard F Ecker
The bile salt export pump (BSEP) actively transports conjugated monovalent bile acids from the hepatocytes into the bile. This facilitates the formation of micelles and promotes digestion and absorption of dietary fat. Inhibition of BSEP leads to decreased bile flow and accumulation of cytotoxic bile salts in the liver. A number of compounds have been identified to interact with BSEP, which results in drug-induced cholestasis or liver injury. Therefore, in silico approaches for flagging compounds as potential BSEP inhibitors would be of high value in the early stage of the drug discovery pipeline...
June 2017: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/28502496/minimal-food-effect-for-eicosapentaenoic-acid-and-docosahexaenoic-acid-bioavailability-from-omega-3-acid-ethyl-esters-with-an-advanced-lipid-technologies-tm-alt-%C3%A2-based-formulation
#8
Miguel A Lopez-Toledano, Thorsteinn Thorsteinsson, Ahmed A Daak, Kevin C Maki, Colleen Johns, Adrian L Rabinowicz, Frederick D Sancilio
BACKGROUND: The absorption of eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic acid (DHA; 22:6n-3) omega-3-acid ethyl esters (EEs) is influenced by food. There is a need for a formulation of EE that is less impacted by food effect. SC401 is a novel Advanced Lipid Technologies-based formulation of EPA-EE and DHA-EE. In the presence of an aqueous medium, Advanced Lipid Technologies forms stable micelles in situ independent of bile salt secretion. This effect is hypothesized to improve EPA-EE and DHA-EE bioavailability while it helps mitigate the food effect associated with their consumption...
March 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28475629/purification-and-characterization-of-recombinant-human-bile-salt-stimulated-lipase-expressed-in-milk-of-transgenic-cloned-cows
#9
Yuhang Wang, Fangrong Ding, Tao Wang, Wenjie Liu, Susanne Lindquist, Olle Hernell, Jianwu Wang, Jing Li, Ling Li, Yaofeng Zhao, Yunping Dai, Ning Li
Bile salt-stimulated lipase (BSSL) is a lipolytic digestive enzyme with broad substrate specificity secreted from exocrine pancreas into the intestinal lumen in all species and from the lactating mammary gland into the milk of some species, notably humans but not cows. BSSL in breast milk facilitates digestion and absorption of milk fat and promotes growth of small for gestational age preterm infants. Thus, purified recombinant human BSSL (rhBSSL) can be used for treatment of patients with fat malabsorption and expressing rhBSSL in the milk of transgenic cloned cows would therefore be a mean to meet a medical need...
2017: PloS One
https://www.readbyqxmd.com/read/28429841/the-development-evidence-and-current-use-of-atx-101-for-the-treatment-of-submental-fat
#10
REVIEW
Corey Georgesen, Shari R Lipner
ATX-101 (deoxycholic acid) is the first pharmaceutical therapy approved by the FDA for the reduction in submental fat. Deoxycholic acid is an endogenous secondary bile acid that normally solubilizes dietary fat, contributing to its breakdown and absorption within the gut. This article reviews the identification of deoxycholic acid as a lipolytic agent, and the mechanism of action, pharmacokinetics, and pharmacodynamics of ATX-101. In addition to phase I/II trials, four Phase III clinical trials have evaluated safety and efficacy of ATX-101...
April 21, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28384537/characterization-of-colloidal-structures-during-intestinal-lipolysis-using-small-angle-neutron-scattering
#11
Oljora Rezhdo, Selena Di Maio, Peisi Le, Kenneth C Littrell, Rebecca L Carrier, Sow-Hsin Chen
HYPOTHESIS: Bile micelles are thought to mediate intestinal absorption, in part by providing a phase into which compounds can partition. Solubilizing capacity of bile micelles is enhanced during the digestion of fat rich food. We hypothesized that the intestinal digestion of triglycerides causes an increase in volume of micelles that can be quantitatively monitored over the course of digestion using small-angle neutron scattering (SANS), and that SANS can enable evaluation of the contribution of each of the components present during digestion to the size of micelles...
August 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28377401/cyp8b1-ablation-prevents-western-diet-induced-weight-gain-and-hepatic-steatosis-because-of-impaired-fat-absorption
#12
Enrico Bertaggia, Kristian K Jensen, Jose Castro-Perez, Yimeng Xu, Gilbert Di Paolo, Robin B Chan, Liangsu Wang, Rebecca A Haeusler
Bile acids (BAs) are cholesterol derivatives that regulate lipid metabolism, through their dual abilities to promote lipid absorption and activate BA receptors. However, different BA species have varying abilities to perform these functions. Eliminating 12α-hydroxy BAs in mice via Cyp8b1 knockout causes low body weight and improved glucose tolerance. The goal of this study was to determine mechanisms of low body weight in Cyp8b1(-/-) mice. We challenged Cyp8b1(-/-) mice with a Western-type diet and assessed body weight and composition...
August 1, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28240162/effects-of-dietary-non-fiber-carbohydrates-on-composition-and-function-of-gut-microbiome-in-monogastrics-a-review
#13
REVIEW
Hailong Jiang, Dongsheng Che, Guixin Qin, Xiangjie Kong, Mohammed Hamdy Farouk
Non-fiber carbohydrates (NFC) have a crucial function on the gut health of monogastrics. This paper aims to review the relevant published materials on the influence of NFCs on the gut's microbial population and composition in monogastrics, and points out the areas of the required research. Total bacteria count and Lactobacillus sp. were decreased with an increase in composition of dietary NFC intake, as well as accompanied by a decrease in the short-chain fatty acids (SCFAs) levels. Consequently, some metabolites were affected by the accumulation of the bile acids, including molecules which control different gene expression levels, as regulators involved in glucose (FXR and TGR5) and fat metabolism (cholesterol)...
2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28191525/obesity-diabetes-and-the-role-of-bile-acids-in-metabolism
#14
Gerald H Tomkin, Daphne Owens
Bile acids have many activities over and above their primary function in aiding absorption of fat and fat soluble vitamins. Bile acids are synthesized from cholesterol, and thus are involved in cholesterol homeostasis. Bile acids stimulate glucagon-like peptide 1 (GLP1) production in the distal small bowel and colon, stimulating insulin secretion, and therefore, are involved in carbohydrate and fat metabolism. Bile acids through their insulin sensitising effect play a part in insulin resistance and type 2 diabetes...
June 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28169529/deacetylated-konjac-glucomannan-is-less-effective-in-reducing-dietary-induced-hyperlipidemia-and-hepatic-steatosis-in-c57bl-6-mice
#15
COMPARATIVE STUDY
Mei-Ying Li, Guan-Ping Feng, Hong Wang, Rui-Li Yang, Zhenlin Xu, Yuan-Ming Sun
Konjac gel foods that mainly consist of deacetylated konjac glucomannan (Da-KGM) are considered to have the same health benefits as native konjac glucomannan (KGM); however, no definitive data support this notion. The objective of this study was to compare the effects of Da-KGM and KGM on the hyperlipidemia and liver steatosis induced by high-fat diet feeding and to investigate the underlying molecular mechanisms. C57BL/6 mice were fed (1) normal chow diet, (2) high-fat diet, (3) HFD with KGM, or (4) HFD with Da-KGM for 10 weeks...
March 1, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28111285/the-interrelationship-between-bile-acid-and-vitamin-a-homeostasis
#16
REVIEW
Ali Saeed, Mark Hoekstra, Martijn Oscar Hoeke, Janette Heegsma, Klaas Nico Faber
Vitamin A is a fat-soluble vitamin important for vision, reproduction, embryonic development, cell differentiation, epithelial barrier function and adequate immune responses. Efficient absorption of dietary vitamin A depends on the fat-solubilizing properties of bile acids. Bile acids are synthesized in the liver and maintained in an enterohepatic circulation. The liver is also the main storage site for vitamin A in the mammalian body, where an intimate collaboration between hepatocytes and hepatic stellate cells leads to the accumulation of retinyl esters in large cytoplasmic lipid droplet hepatic stellate cells...
May 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28028939/mechanism-based-modeling-of-gastric-emptying-rate-and-gallbladder-emptying-in-response-to-caloric-intake
#17
B Guiastrennec, D P Sonne, M Hansen, J I Bagger, A Lund, J F Rehfeld, O Alskär, M O Karlsson, T Vilsbøll, F K Knop, M Bergstrand
Bile acids released postprandially modify the rate and extent of absorption of lipophilic compounds. The present study aimed to predict gastric emptying (GE) rate and gallbladder emptying (GBE) patterns in response to caloric intake. A mechanism-based model for GE, cholecystokinin plasma concentrations, and GBE was developed on data from 33 patients with type 2 diabetes and 33 matched nondiabetic individuals who were administered various test drinks. A feedback action of the caloric content entering the proximal small intestine was identified for the rate of GE...
December 2016: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/28009872/medium-chain-fatty-acids-reduce-serum-cholesterol-by-regulating-the-metabolism-of-bile-acid-in-c57bl-6j-mice
#18
Yinghua Liu, Yong Zhang, Xinsheng Zhang, Qing Xu, Xueyan Yang, Changyong Xue
Hypercholesterolemia is one of the important risk factors of atherosclerosis (AS). The aim of this study is to explore the effect of medium-chain fatty acids (MCFAs) on serum cholesterol levels and their mechanism of action. Hyperlipemia, as a model of abnormal lipid hypermetabolism, was established by using a high fat diet in C57BL/6J mice. Forty eight mice with dyslipidemia were randomly divided into 4 groups, 12 mice per group, including the control group, the 2% caprylic acid (C8:0)-treated group, 2% capric acid (C10:0)-treated group, and 2% oleic acid (C18:1)-treated group...
December 23, 2016: Food & Function
https://www.readbyqxmd.com/read/27929465/using-multi-fluorinated-bile-acids-and-in-vivo-magnetic-resonance-imaging-to-measure-bile-acid-transport
#19
Jessica Felton, Kunrong Cheng, Anan Said, Aaron C Shang, Su Xu, Diana Vivian, Melissa Metry, James E Polli, Jean-Pierre Raufman
Along with their traditional role as detergents that facilitate fat absorption, emerging literature indicates that bile acids are potent signaling molecules that affect multiple organs; they modulate gut motility and hormone production, and alter vascular tone, glucose metabolism, lipid metabolism, and energy utilization. Changes in fecal bile acids may alter the gut microbiome and promote colon pathology including cholerrheic diarrhea and colon cancer. Key regulators of fecal bile acid composition are the small intestinal Apical Sodium-dependent Bile Acid Transporter (ASBT) and fibroblast growth factor-19 (FGF19)...
November 27, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27875503/influence-of-partial-external-biliary-diversion-on-the-lipid-profile-in-children-with-progressive-familial-intrahepatic-cholestasis
#20
Irena Jankowska, Piotr Czubkowski, Aldona Wierzbicka, Joanna Pawłowska, Piotr Kaliciński, Piotr Socha
OBJECTIVES: The concentration of bile acids is highly increased in progressive familial intrahepatic cholestasis (PFIC). Bile acids are the end products of cholesterol metabolism, and aid in the absorption of fat-soluble vitamins and dietary fat. The aim of our study was to investigate lipid metabolism in patients with PFIC with focus on the effect of partial external biliary diversion (PEBD). METHODS: In 26 patients with PFIC, who underwent PEBD surgery at the median age of 2...
December 2016: Journal of Pediatric Gastroenterology and Nutrition
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