Browse Items · NEOMED Bibliography Database

On the mechanisms of biliary flux.

Since the late 1950s, transport of bile in the liver has been described by the “osmotic concept,” according to which bile flows into the canaliculi toward the ducts, countercurrent to the blood flow in the sinusoids. However, because of the small…

Tags: 2021, Animal, Bile, Humans, Liver/metabolism, Mice, Osmosis

HNF4 and COUP-TFII interact to modulate transcription of the cholesterol 7alpha-hydroxylase gene (CYP7A1).

The gene for cholesterol 7alpha-hydroxylase (CYP7A1) contains a sequence at nt -149 to -118 that was found to play a large role in determining the overall transcriptional activity and regulation of the promoter. Hepatocyte nuclear factor 4 (HNF4) and…

Peroxisome proliferator-activated receptor alpha (PPARalpha) and agonist inhibit cholesterol 7alpha-hydroxylase gene (CYP7A1) transcription.

Fibrates are widely used hypolipidemic drugs that regulate the expression of many genes involved in lipid metabolism by activating the peroxisome proliferator-activated receptor alpha (PPARalpha). The objective of this study was to investigate the…

Tags: *DNA-Binding Proteins, *Regulatory Sequences, 2000, Animals, Anticholesteremic Agents/pharmacology, Basic Helix-Loop-Helix Leucine Zipper Transcription Factors, Binding Sites, Chiang J Y, Cholesterol 7-alpha-Hydroxylase/biosynthesis/*genetics, Clofibric Acid/pharmacology, Cytoplasmic and Nuclear/*agonists, Department of Integrative Medical Sciences, Enzymologic, Gene Expression Regulation, Genes, Genetic, Hepatocyte Nuclear Factor 4, Humans, Journal of lipid research, Liver/metabolism, Marrapodi M, Models, NEOMED College of Medicine, Nucleic Acid, Peroxisome Proliferators/pharmacology, Phosphoproteins/metabolism, Promoter Regions, Protein Binding, Pyrimidines/pharmacology, Rats, Receptors, Reporter, Response Elements, Retinoic Acid/metabolism, Retinoid X Receptors, Species Specificity, Transcription, Transcription Factors/*agonists/metabolism, Transcriptional Activation

Nuclear receptor-mediated repression of human cholesterol 7alpha-hydroxylase gene transcription by bile acids.

Hydrophobic bile acids strongly repressed transcription of the human cholesterol 7alpha-hydroxylase gene (CYP7A1) in the bile acid biosynthetic pathway in the liver. Farnesoid X receptor (FXR) repressed CYP7A1/Luc reporter activity in a transfection…

Tags: *Hydroxysteroid Dehydrogenases, *Membrane Glycoproteins, 2001, Animals, Bile Acids and Salts/*pharmacology, Caco-2 Cells, Carrier Proteins/genetics/physiology, Cell Line, Chen W, Chiang J Y, CHO Cells, Cholesterol 7-alpha-Hydroxylase/*genetics, Cricetinae, Cultured, Cytoplasmic and Nuclear/genetics/*physiology, Department of Integrative Medical Sciences, DNA-Binding Proteins/drug effects/genetics/physiology, DNA/metabolism, Embryo, Gene Expression/*drug effects, Genetic, Genetic/drug effects, Humans, Journal of lipid research, Kidney, Liver/metabolism, Luciferases/genetics, Mammalian, Messenger/analysis, NEOMED College of Medicine, Owsley E, Promoter Regions, Rats, Receptors, Recombinant Fusion Proteins/metabolism, Retinoic Acid/genetics/physiology, Retinoid X Receptors, Reverse Transcriptase Polymerase Chain Reaction, RNA, Stroup D, Taurocholic Acid/pharmacology, Transcription, Transcription Factors/drug effects/genetics/physiology, Transfection, Tumor Cells, Yang Y

Regulation of bile acid synthesis.

Bile acids are important physiological agents required for disposal of cholesterol and absorption of vitamins and fats. Bile acids are synthesized from cholesterol in the liver. Enterohepatic circulation of bile acids is very efficient and plays an…

Tags: 1998, Animals, Bile Acids and Salts/*biosynthesis, Chiang J Y, Cholestanetriol 26-Monooxygenase, Cholesterol 7-alpha-Hydroxylase/genetics/*metabolism, Cholesterol/metabolism, Cytochrome P-450 Enzyme System/metabolism, Cytochrome P450 Family 7, Department of Integrative Medical Sciences, Frontiers in bioscience : a journal and virtual library, Gene Expression Regulation, Humans, Liver/metabolism, NEOMED College of Medicine, Steroid 12-alpha-Hydroxylase/metabolism, Steroid Hydroxylases/metabolism

Signal Transduction Mechanisms of Alcoholic Fatty Liver Disease: Emer ging Role of Lipin-1.

Lipin-1, a mammalian phosphatidic acid phosphatase (PAP), is a bi-functional molecule involved in various signaling pathways via its function as a PAP enzyme in the triglyceride synthesis pathway and in the nucleus as a transcriptional co-regulator.…

Hepatocyte nuclear factor 4alpha regulation of bile acid and drug metabolism.

The hepatocyte nuclear factor 4alpha (HNF4alpha) is a liver-enriched nuclear receptor that plays a critical role in early morphogenesis, fetal liver development, liver differentiation and metabolism. Human HNF4alpha gene mutations cause maturity…

Tags: 2009, Animals, Bile Acids and Salts/*metabolism, Chiang John Y L, Department of Integrative Medical Sciences, Expert opinion on drug metabolism & toxicology, Gene Expression Regulation, Genetic Predisposition to Disease, Hepatocyte Nuclear Factor 4/genetics/*metabolism, Humans, Lipid Metabolism, Liver/metabolism, Mutation, NEOMED College of Medicine, Pharmaceutical Preparations/*metabolism, Signal Transduction/physiology

Intestinal Farnesoid X Receptor and Takeda G Protein Couple Receptor 5 Signaling in Metabolic Regulation.

Bile acids play a critical role in the regulation of glucose, lipid and energy metabolisms by activating the nuclear bile acid receptor farnesoid X receptor (FXR) and membrane G protein-coupled bile acid receptor-1 (aka takeda G protein couple…

Tags: *Signal Transduction, 2017, Animals, Bile Acids and Salts/biosynthesis/metabolism, Boehme Shannon, Chiang John Y L, Cytoplasmic and Nuclear/*metabolism, Department of Integrative Medical Sciences, Digestive diseases (Basel, Switzerland), Donepudi Ajay, Ferrell Jessica, G-Protein-Coupled/*metabolism, Humans, Intestinal Mucosa/*metabolism, Liu Hailiang, Liver/metabolism, NEOMED College of Medicine, Pathak Preeti, Receptors

Estrogen-related receptor gamma controls hepatic CB1 receptor-mediated CYP2E1 expression and oxidative liver injury by alcohol.

BACKGROUND: The hepatic endocannabinoid system and cytochrome P450 2E1 (CYP2E1), a key enzyme causing alcohol-induced reactive oxygen species (ROS) generation, are major contributors to the pathogenesis of alcoholic liver disease. The nuclear hormone…

Tags: 2013, Alcohol-Induced Injury, Alcoholic Liver Disease, Alcoholic/genetics/*metabolism/prevention & control, Animals, Cannabinoid, CB1/*physiology, Chiang John Y L, Choi Hueng-Sik, Cytochrome P-450 CYP2E1 Inhibitors, Cytochrome P-450 CYP2E1/genetics/*metabolism, Department of Integrative Medical Sciences, Enzyme Inhibitors/pharmacology/therapeutic use, Enzymologic/drug effects/physiology, Estrogen/deficiency/genetics/*physiology, Ethanol/pharmacology, Gene Expression Profiling/methods, Gene Expression Regulation, Gene Regulation, Genetic/physiology, Gut, Inbred C57BL, Jang Hyun-Hee, Jeong Won-Il, Kim Don-Kyu, Kim Jung Ran, Kim Yong-Hoon, Knockout, Koh Minseob, Koo Seung-Hoi, Lee Chul-Ho, Liver, Liver Diseases, Liver Metabolism, Liver/metabolism, Male, Mice, NEOMED College of Medicine, Oxidation-Reduction, Oxidative Stress/physiology, Park Jinyoung, Park Seung Bum, Park Tae-Sik, Receptor, Receptors, Signal Transduction/drug effects/physiology, Tamoxifen/analogs & derivatives/pharmacology/therapeutic use, Transcription, Yun Chul-Ho

Bile acid signaling in metabolic disease and drug therapy.

Bile acids are the end products of cholesterol catabolism. Hepatic bile acid synthesis accounts for a major fraction of daily cholesterol turnover in humans. Biliary secretion of bile acids generates bile flow and facilitates hepatobiliary secretion…

A Prospero-related homeodomain protein is a novel co-regulator of hepatocyte nuclear factor 4alpha that regulates the cholesterol 7alpha-hydroxylase gene.

Prox1, an early specific marker for developing liver and pancreas in foregut endoderm has recently been shown to interact with alpha-fetoprotein transcription factor and repress cholesterol 7alpha-hydroxylase (CYP7A1) gene transcription. Using a…

Tags: *Gene Expression Regulation, 2006, Aged, Amino Acid Motifs, Bile Acids and Salts/metabolism, Cell Line, Cell Nucleus/metabolism, Cells, Chiang John Y L, Cholesterol 7-alpha-Hydroxylase/*chemistry/*genetics, Cultured/metabolism, Department of Integrative Medical Sciences, Enzymologic, Female, Genes, Genetic, Gluconeogenesis, Glutathione Transferase/metabolism, Hepatocyte Nuclear Factor 4/metabolism/*physiology, Hepatocytes/metabolism, Homeodomain Proteins/metabolism/*physiology, Humans, Immunoprecipitation, Li Tiangang, Liver/metabolism, Luciferases/metabolism, Male, Messenger/metabolism, Middle Aged, NEOMED College of Medicine, Phosphoenolpyruvate Carboxykinase (ATP)/metabolism, Plasmids/metabolism, Protein Structure, Reporter, Response Elements, Reverse Transcriptase Polymerase Chain Reaction, RNA, Small Interfering/metabolism, Song Kwang-Hoon, Tertiary, The Journal of biological chemistry, Time Factors, Transcription, Transcriptional Activation, Transfection, Tumor Suppressor Proteins, Two-Hybrid System Techniques

Identification of novel pathways that control farnesoid X receptor-mediated hypocholesterolemia.

Farnesoid X receptor (FXR) plays important regulatory roles in bile acid, lipoprotein, and glucose homeostasis. Here, we have utilized Fxr(-/-) mice and mice deficient in scavenger receptor class B type I (SR-BI), together with an

A metabolic stress-inducible miR-34a-HNF4alpha pathway regulates lipid and lipoprotein metabolism.

Non-alcoholic fatty liver disease (NAFLD) is one of the most common liver diseases, but its underlying mechanism is poorly understood. Here we show that hepatocyte nuclear factor 4alpha (HNF4alpha), a liver-enriched nuclear hormone receptor, is…

Bile acid signaling in lipid metabolism: metabolomic and lipidomic analysis of lipid and bile acid markers linked to anti-obesity and anti-diabetes in mice.

Bile acid synthesis is the major pathway for catabolism of cholesterol. Cholesterol 7alpha-hydroxylase (CYP7A1) is the rate-limiting enzyme in the bile acid biosynthetic pathway in the liver and plays an important role in regulating lipid, glucose…

Tags: 2015, Animals, Bile acid metabolism, Bile Acids and Salts/genetics/*metabolism, Biochimica et biophysica acta, Cheng Jie, Chiang John Y L, Cholesterol 7-alpha-Hydroxylase/genetics/metabolism, CYP7A1, Department of Integrative Medical Sciences, Diabetes Mellitus/genetics/*metabolism, Diet, farnesoid X receptor (FXR), Female, Ferrell Jessica M, Glucose/genetics/metabolism, Gonzalez Frank J, High-Fat/methods, Homeostasis, Inbred C57BL, Insulin Resistance, Intestinal Mucosa/metabolism, Jiang Changtao, Krausz Kristopher W, Li Tiangang, Lipid Metabolism/*physiology, lipidomics, Liver/metabolism, Male, Metabolome/*genetics, Metabolomics/methods, Mice, NEOMED College of Medicine, Obesity/genetics/*metabolism, Qi Yunpeng, Rats, Signal Transduction, tauro-beta-muricholic acid, Taurocholic Acid/analogs & derivatives/genetics/metabolism, Transgenic

All-trans-retinoic acid ameliorates hepatic steatosis in mice by a novel transcriptional cascade.

UNLABELLED: Mice deficient in small heterodimer partner (SHP) are protected from diet-induced hepatic steatosis resulting from increased fatty acid oxidation and decreased lipogenesis. The decreased lipogenesis appears to be a direct consequence of…

Regulation of cholesterol and bile acid homeostasis by the cholesterol 7alpha-hydroxylase/steroid response element-binding protein 2/microRNA-33a axis in mice.

UNLABELLED: Bile acid synthesis not only produces physiological detergents required for intestinal nutrient absorption, but also plays a critical role in regulating hepatic and whole-body metabolic homeostasis. We recently reported that…

Bile acid metabolism and signaling.

Bile acids are important physiological agents for intestinal nutrient absorption and biliary secretion of lipids, toxic metabolites, and xenobiotics. Bile acids also are signaling molecules and metabolic regulators that activate nuclear receptors and…

Browse Items (17 total)