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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…

Bile acid regulation of gene expression: roles of nuclear hormone receptors.

Bile acids derived from cholesterol and oxysterols derived from cholesterol and bile acid synthesis pathways are signaling molecules that regulate cholesterol homeostasis in mammals. Many nuclear receptors play pivotal roles in the regulation of bile…

Tags: 2002, Animals, Bile Acids and Salts/*physiology, Chiang John Y L, Cytoplasmic and Nuclear/*physiology, Department of Integrative Medical Sciences, Endocrine reviews, Gene Expression Regulation/*physiology, Humans, NEOMED College of Medicine, Receptors

Bile acid regulation of hepatic physiology: III. Bile acids and nuclear receptors.

Bile acids are physiological detergents that facilitate excretion, absorption, and transport of fats and sterols in the intestine and liver. Recent studies reveal that bile acids also are signaling molecules that activate several nuclear receptors…

Tags: 2003, American journal of physiology. Gastrointestinal and liver physiology, Animals, Bile Acids and Salts/biosynthesis/genetics/*physiology, Bile/*physiology, Cardiovascular Diseases/genetics/physiopathology, Chiang John Y L, Cholesterol/physiology, Cytoplasmic and Nuclear/*physiology, Department of Integrative Medical Sciences, Feedback/physiology, Gene Expression Regulation/physiology, Humans, Liver Diseases/genetics/physiopathology, Liver/*physiology, NEOMED College of Medicine, Receptors

Farnesoid X receptor activation increases reverse cholesterol transport by modulating bile acid composition and cholesterol absorption in mice.

UNLABELLED: Activation of farnesoid X receptor (FXR) markedly attenuates development of atherosclerosis in animal models. However, the underlying mechanism is not well elucidated. Here, we show that the FXR agonist, obeticholic acid (OCA), increases…

Hepatic carboxylesterase 1 is essential for both normal and farnesoid X receptor-controlled lipid homeostasis.

UNLABELLED: Nonalcoholic fatty liver disease (NAFLD) is one of the major health concerns worldwide. Farnesoid X receptor (FXR) is considered a therapeutic target for treatment of NAFLD. However, the mechanism by which activation of FXR lowers hepatic…

Mechanism of rifampicin and pregnane X receptor inhibition of human cholesterol 7 alpha-hydroxylase gene transcription.

Bile acids, steroids, and drugs activate steroid and xenobiotic receptor pregnane X receptor (PXR; NR1I2), which induces human cytochrome P4503A4 (CYP3A4) in drug metabolism and cholesterol 7 alpha-hydroxylase (CYP7A1) in bile acid synthesis in the…

Regulation of bile acid synthesis: pathways, nuclear receptors, and mechanisms.

Tags: 2004, Animals, Bile Acids and Salts/*biosynthesis, Chiang John Y L, Cytoplasmic and Nuclear/*physiology, Department of Integrative Medical Sciences, Feedback, Humans, Journal of hepatology, Lipid Metabolism, NEOMED College of Medicine, Physiological, Receptors

Small heterodimer partner deletion prevents hepatic steatosis and when combined with farnesoid X receptor loss protects against type 2 diabetes in mice.

Nuclear receptors farnesoid X receptor (FXR) and small heterodimer partner (SHP) are important regulators of bile acid, lipid, and glucose homeostasis. Here, we show that global Fxr (-/-) Shp(-/-) double knockout (DKO) mice are refractory to weight…

Transcriptional activation of the cholesterol 7alpha-hydroxylase gene (CYP7A) by nuclear hormone receptors.

The gene encoding cholesterol 7alpha-hydroxylase (CYP7A), the rate-limiting enzyme in bile acid synthesis, is transcriptionally regulated by bile acids and hormones. Previously, we have identified two bile acid response elements (BARE) in the…

Tags: *Receptors, *Transcriptional Activation, 1998, Animals, Base Sequence, Bile Acids and Salts/biosynthesis, Chiang J Y, Cholesterol 7-alpha-Hydroxylase/*genetics, COUP Transcription Factor II, COUP Transcription Factors, Crestani M, Cultured, Cytoplasmic and Nuclear/*physiology, Department of Integrative Medical Sciences, DNA-Binding Proteins/metabolism, DNA/metabolism, Galli G, Genes, Genetic, Hepatocyte Nuclear Factor 4, Hormones/*physiology, Journal of lipid research, Luciferases/genetics, Molecular Sequence Data, Mutagenesis, NEOMED College of Medicine, Nucleic Acid, Oligonucleotide Probes/metabolism, Phosphoproteins/metabolism, Promoter Regions, Rats, Receptors, Repetitive Sequences, Reporter, Retinoic Acid/metabolism, Retinoid X Receptors, Sadeghpour A, Site-Directed, Steroid, Stroup D, Transcription Factors/metabolism, Tumor Cells

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