Browse Items · NEOMED Bibliography Database

Mechanism Of Tissue-specific Farnesoid X Receptor In Suppressing The Expression Of Genes In Bile-acid Synthesis In Mice

Activation of farnesoid X receptor (Fxr, Nr1h4) is a major mechanism in suppressing bile-acid synthesis by reducing the expression levels of genes encoding key bile-acid synthetic enzymes (e.g., cytochrome P450 [CYP]7A1/Cyp7a1 and CYP8B1/Cyp8b1).…

A Systematic Review: The Appraisal Of The Effects Of Metformin On Lipoprotein Modification And Function

Aims Metformin is a commonly prescribed anti-hyperglycaemic pharmacological agent, and it remains a staple in the management of type II diabetes. In addition to metformin's glucose lowering effects, research has indicated that metformin inhibits…

Increasing lipid adherence to goal

BACKGROUND: In April 2004, the National Cholesterol Education Program Adult Treatment Panel III Guidelines for management of high cholesterol encouraged even lower levels of low-density lipoprotein (LDL) than previous guidelines for high and very…

Effect of 1-palmitoyl lysophosphatidylcholine on phase properties of 1,2-dipalmitoyl phosphatidylethanolamine: A thermodynamic and NMR study

The effect of 1-palmitoyl lysophosphatidylcholine (PLPC) on the phase behaviour of 1,2-dipalmitoyl phosphatidylethanolamine (DPPE) in excess water (34 wt%) has been examined by differential scanning calorimetry, scanning dilatometry and isothermal…

On the stability of the ripple phase in the DPPC/PLPC/water ternary system

The effect of incorporation of 1-palmitoyl-sn-glycero-3-phosphocholine (PLPC) on the structure of the P-beta' ripple mesophase in aqueous dispersions of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) has been studied by differential scanning…

Structure and functions of human oxysterol 7 alpha-hydroxylase cDNAs and gene CYP7B1

Oxysterol 7 alpha-hydroxylase has broad substrate specificity for sterol metabolites and may be involved in many metabolic processes including bile acid synthesis and neurosteroid metabolism, The cloned human oxysterol 7 alpha-hydroxylase (CYP7B1)…

Physicochemical characterization of a model digestive mixture by H-2 NMR

H-2 nuclear magnetic resonance (NMR) spectra were obtained at 30.87 MHz for 8% (w/v) aqueous dispersions of mixtures of bile salts (MBS), mixed intestinal lipids (MIL; myristic acid, monomyristoylglycerol dimyristoylphos-phatidylcholine = 5:1:1), and…

Hormonal regulation of cholesterol 7 alpha-hydroxylase specific activity, mRNA levels, and transcriptional activity in vivo in the rat

In primary cultures of rat hepatocytes, transcription of the cholesterol 7 alpha-hydroxylase gene is induced synergistically by glucocorticoid and thyroid hormones. The objective of the present study was to evaluate the role of glucocorticoid and…

Mechanisms of cholesterol and sterol regulatory element binding protein regulation of the sterol 12 alpha-hydroxylase gene (CYP8B1)

Sterol 12alpha-hydroxylase (CYP8B1) is an obligatory enzyme for the synthesis of cholic acid and regulation of liver bile acid synthesis and intestine cholesterol absorption. The present study evaluates the roles for sterol regulatory element binding…

An overlapping binding site in the CYP7A1 promoter allows activation of FXR to override the stimulation by LXR alpha

An overlapping binding site in the CYP7A1 promoter allows activation of FXR to override the stimulation by LXR alpha. Am J Physiol Gastrointest Liver Physiol 293: G817-G823, 2007. First published August 9, 2007; doi:10.1152/ajpgi.00209.2007.-The aim…

Determination of membrane immersion depth with O-2: A high-pressure F-19 NMR study

Oxygen is known to partition with an increasing concentration gradient toward the hydrophobic membrane interior. At partial pressures (P-O2) of 100 Atm or more, this concentration gradient is sufficient to induce paramagnetic effects that depend…

Tags: 2001, Biophysical Journal, Biophysics, Cholesterol, conformational-changes, dynamics, Hancock R E W, Journal Article, Lipid Bilayers, Luchette P A, micelles, nuclear magnetic-resonance, phospholipid-bilayers, Prosser R S, protein-structure, Rozek A, solid-state nmr, Westerman P W, x-ray-diffraction

FAILURE OF INTRAVENOUS-INFUSION OF TAUROCHOLATE TO DOWN-REGULATE CHOLESTEROL 7-ALPHA-HYDROXYLASE IN RATS WITH BILIARY FISTULAS

Background/Aims: The decrease in cholesterol 7 alpha-hydroxylase induced by intraduodenal infusion of taurocholate in bile fistula vats may be indirect, i.e., mediated through release or absorption of an intestinal factor in response to the presence…

A thermodynamic and NMR investigation of 1-lyso-palmitoyllecithin/1,2-dipalmitoylphosphatidylethanol-amine/water system

The effect of incorporation of 1-palmitoyl-sn-glycero-3-phosphocholine (PLPC) on the bilayer structures occurring in aqueous dispersions of 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE) has been studied by phosphorus 31 nuclear magnetic…

Tags: 1996, Checchetti A, Chidichimo G, Cholesterol, Crystallography, fusion, Grasso D, Imbardelli D, Journal Article, LaRosa C, liposomal membranes, lysolecithin, Molecular Crystals and Liquid Crystals Science and Technology Section a-Molecular Crystals and Liquid Crystals, Nicoletta F P, Temperature, vesicle, Westerman P

PXR induces CYP27A1 and regulates cholesterol metabolism in the intestine.

Mitochondrial sterol 27-hydroxylase (CYP27A1) catalyzes oxidative cleavage of the sterol side chain in the bile acid biosynthetic pathway in the liver and

Tags: *Lipid Metabolism, 2007, ATP Binding Cassette Transporter, ATP Binding Cassette Transporter 1, ATP-Binding Cassette Transporters/genetics, Base Sequence, Cell Line, Chen Wenling, Chiang John Y L, Cholestanetriol 26-Monooxygenase/*metabolism, Cholesterol, Cholesterol/*metabolism, Department of Integrative Medical Sciences, Fluorinated, Genes, Genetic/drug effects, Genetic/genetics, HDL/metabolism, Hepatocytes/drug effects/enzymology/metabolism, Humans, Hydrocarbons, Hydroxycholesterols/metabolism/pharmacology, Intestinal Mucosa/metabolism, Intestines/cytology/drug effects/enzymology, Journal of lipid research, Li Tiangang, Member 1, Messenger/genetics/metabolism, Molecular Sequence Data, NEOMED College of Medicine, Pregnane X Receptor, Promoter Regions, Receptors, Reporter, Response Elements/genetics, Rifampin/pharmacology, RNA, Steroid/*metabolism, Subfamily G, Sulfonamides/pharmacology, Transcription, Up-Regulation/drug effects

Hepatic hepatocyte nuclear factor 4alpha is essential for maintaining triglyceride and cholesterol homeostasis.

OBJECTIVE: Loss-of-function mutations in human hepatocyte nuclear factor 4alpha (HNF4alpha) are associated with maturity-onset diabetes of the young and lipid disorders. However, the mechanisms underlying the lipid disorders are poorly understood. In…

Retinoic acid-related orphan receptor alpha regulates diurnal rhythm and fasting induction of sterol 12alpha-hydroxylase in bile acid synthesis.

Sterol 12alpha-hydroxylase (CYP8B1) is required for cholic acid synthesis and plays a critical role in intestinal cholesterol absorption and pathogenesis of cholesterol gallstone, dyslipidemia, and diabetes. In this study we investigated the…

Targeting the Enterohepatic Bile Acid Signaling Induces Hepatic Autophagy via a

BACKGROUND & AIMS: Hepatic cholesterol accumulation and autophagy defects contribute to hepatocyte injury in fatty liver disease. Bile acid synthesis is a major pathway for cholesterol catabolism in the liver. This study aims to understand the…

Tags: 2017, 4EBP-1, ACAT, acyl-CoA:cholesterol acyltransferase, CE, Cellular and molecular gastroenterology and hepatology, Chavan Hemantkumar, Chiang John Y L, chloroquine, Cholesterol, cholesterol 7alpha-hydroxylase, cholesterol ester, Cholestyramine, ChTM, CQ, CYP7A1, Department of Integrative Medical Sciences, diet-induced obesity, Ding Wen-Xing, Ding Yifeng, DIO, endoplasmic reticulum, ER, eukaryotic translation initiation factor 4E-binding protein 1, Fatty Liver, FC, free cholesterol, glycogen synthase kinase 3beta, GSK3beta, HMG-CoA reductase, HMGCR, Krishnamurthy Partha, LC3, LDLR, Li Jibiao, Li Tiangang, LMP, low-density lipoprotein receptor, lysosome membrane permeabilization, Matye David, messenger RNA, microtubule-associated protein 1A/1B-light chain 3, mRNA, mTOR, NEOMED College of Medicine, Ni Hong-Min, Nuclear Receptor, phosphatidylinositol, PI, plasma membrane, PM, S6, SREBP, sterol response element binding protein, the nutrient sensing mechanistic target of rapamycin, tibosomal protein S6, Wang Yifeng

Bile acid receptors in non-alcoholic fatty liver disease.

Accumulating data have shown that bile acids are important cell signaling molecules, which may activate several signaling pathways to regulate biological processes. Bile acids are endogenous ligands for the farnesoid X receptor (FXR) and TGR5, a…

Female sex steroid induced epithelial changes in the gallbladder of the ovariectomized Syrian hamster.

Ovariectomized Syrian hamsters treated by female sex steroids during a 1-month period show gallbladder surface epithelial changes in the fundic area consistent with apical bulging and decapitations of the epithelial cells. These events were detected…

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