Browse Items · NEOMED Bibliography Database

IL-1 induces mitochondrial translocation of IRAK2 to suppress oxidative metabolism in adipocytes.

Chronic inflammation is a common feature of obesity, with elevated cytokines such as interleukin-1 (IL-1) in the circulation and tissues. Here, we report an unconventional IL-1R-MyD88-IRAK2-PHB/OPA1 signaling axis that reprograms mitochondrial…

Orphan nuclear receptor oestrogen-related receptor gamma (ERRgamma) plays a key role in hepatic cannabinoid receptor type 1-mediated induction of CYP7A1 gene expression.

Bile acids are primarily synthesized from cholesterol in the liver and have important roles in dietary lipid absorption and cholesterol homoeostasis. Detailed roles of the orphan nuclear receptors regulating cholesterol 7alpha-hydroxylase (CYP7A1),…

Tags: 2015, Animals, bile acid, Bile Acids and Salts/metabolism, Cannabinoid, cannabinoid receptors, CB1/agonists/genetics/*metabolism, Cells, Chiang John Y L, Choi Hueng-Sik, Cholesterol 7-alpha-Hydroxylase/*biosynthesis/genetics, cholesterol 7alpha-hydroxylase (CYP7A1), Cultured, Cytoplasmic and Nuclear/metabolism, Department of Integrative Medical Sciences, Drug Inverse Agonism, Estrogen/genetics/*metabolism, Ethanol/pharmacology, Gene Expression, Genetic, Glycerides/pharmacology, GSK5182, HEK293 Cells, Hepatocytes/metabolism, Humans, Inbred C57BL, Jeong Won-Il, Kim Don-Kyu, Kim Seong Heon, Knockout, Lee Chul-Ho, Lee In-Kyu, Lee Ji-Min, Liver/*metabolism, Mice, NEOMED College of Medicine, oestrogen-related receptor gamma (ERRgamma), orphan nuclear receptor, Park Seung Bum, Promoter Regions, Rats, Receptor, Receptors, small heterodimer partner (SHP), Sprague-Dawley, The Biochemical journal, Transcription, Zhang Yaochen

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

Regulation of CYP4F2 leukotriene B4 omega-hydroxylase by retinoic acids in HepG2 cells.

The human CYP4F2 gene encodes a LTB4 omega-hydroxylase P450 prominently expressed in liver and kidney that functions to metabolize and inactivate the pro-inflammatory eicosanoids, LTB4 and arachidonic acid. HepG2 cells transfected with CYP4F2 -506/-6…

Promoter activity and regulation of the CYP4F2 leukotriene B(4) omega-hydroxylase gene by peroxisomal proliferators and retinoic acid in HepG2 cells.

The human liver CYP4F2 gene (Accession No. AF221943) encodes a leukotriene B(4) omega-hydroxylase that metabolizes leukotriene B(4) (LTB(4)) to a less potent proinflammatory eicosanoid, 20-OH-LTB(4). We sequenced a 6.7-kb genomic fragment of the…

Transcriptional regulation of the human sterol 12alpha-hydroxylase gene (CYP8B1): roles of heaptocyte nuclear factor 4alpha in mediating bile acid repression.

Sterol 12alpha-hydroxylase catalyzes the synthesis of cholic acid and controls the ratio of cholic acid over chenodeoxycholic acid in the bile. Transcription of CYP8B1 is inhibited by bile acids, cholesterol, and insulin. To study the mechanism of…

Differential protein acetylation assists import of excess SOD2 into mitochondria and mediates SOD2 aggregation associated with cardiac hypertrophy in the murine

SOD2 is the primary antioxidant enzyme neutralizing (*)O2(-) in mitochondria. Cardiac-specific SOD2 overexpression (SOD2-tg) induces supernormal function and cardiac hypertrophy in the mouse heart. However, the reductive stress imposed by SOD2…

Redox-dependent mechanisms in coronary collateral growth: the "redox window" hypothesis.

This review addresses the complexity of coronary collateral growth from the aspect of redox signaling and introduces the concept of a "redox window" in the context of collateral growth. In essence, the redox window constitutes a range in the redox…

Tags: 2009, Angiotensin II/physiology, Animals, Antioxidants & redox signaling, Belmadani Souad, Carrao Ana Catarina Ribeiro, Chilian William M, Coronary Vessels/*growth & development/metabolism, Department of Integrative Medical Sciences, Humans, NEOMED College of Medicine, Ohanyan Vahagn, Oxidation-Reduction, Pung Yuh Fen, Reactive Oxygen Species/metabolism, Rocic Petra, Yun June

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.…

Induction of vascular progenitor cells from endothelial cells stimulates coronary collateral growth.

RATIONALE: A well-developed coronary collateral circulation improves the morbidity and mortality of patients following an acute coronary occlusion. Although regenerative medicine has great potential in stimulating vascular growth in the heart, to…

Tags: *Collateral Circulation, *Coronary Circulation, 2012, Animal, Animals, Bailey Erin, Biomarkers/metabolism, Cell Differentiation, Cell Lineage, Cells, Chilian William M, Circulation research, Coronary Occlusion/genetics/metabolism/pathology/physiopathology/*surgery, Coronary Vessels/metabolism/pathology/*physiopathology, Cultured, Delucia Angelo, Department of Integrative Medical Sciences, Developmental, Disease Models, Endothelial Cells/metabolism/pathology/*transplantation, Enrick Molly, Epigenesis, Gene Expression Profiling, Gene Expression Regulation, Genetic, Guarini Giacinta, Induced Pluripotent Stem Cells/metabolism/*transplantation, Kolz Christopher L, Mice, Muscle, Myocytes, NEOMED College of Medicine, Neovascularization, Ohanyan Vahagn, Physiologic, Pung Yuh Fen, Rats, Regenerative Medicine/methods, Regional Blood Flow, Reverse Transcriptase Polymerase Chain Reaction, SCID, Smooth, Smooth Muscle/metabolism/pathology/*transplantation, Sprague-Dawley, Stevanov Kelly, Teratoma/metabolism/pathology, Time Factors, Transcription Factors/genetics/metabolism, Transduction, Vascular/metabolism/pathology/*physiopathology, Yin Liya

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…

Epigenetic regulation in diabetes-associated oxidative stress and myocardial dysfunction.

Tags: *Epigenesis, *Oxidative Stress, 2018, Cardiomyopathies, Chilian William M, Department of Integrative Medical Sciences, Dong Feng, Genetic, Humans, International journal of cardiology, NEOMED College of Medicine, Yin Liya

On the mechanism of bile acid inhibition of rat sterol 12alpha-hydroxylase gene (CYP8B1) transcription: roles of alpha-fetoprotein transcription factor and hepatocyte nuclear factor 4alpha.

The sterol 12alpha-hydroxylase (CYP8B1) is a key enzyme of the bile acid biosynthetic pathway. It regulates the composition of bile acids in bile, i.e. ratio between cholic acid (CA) and chenodeoxycholic acid (CDCA). In similarity with cholesterol…

Lipocalin‐2 Protects Against Diet‐Induced Nonalcoholic Fatty Liver Disease by Targeting Hepatocytes.

Hepatocytes are the major source of hepatic lipocalin‐2 (LCN2), which is up‐regulated in response to inflammation, injury, or metabolic stress. So far, the role of hepatocyte‐derived LCN2 in the development of nonalcoholic fatty liver disease (NAFLD)…

Tags: 2019, Chen Xiaoli, Department of Integrative Medical Sciences, Fatty Liver, Hepatology communications, Jadhav Kavita, Kasumov Takhar, Li Yuanyuan, LIPOCALIN, LIVER disease treatment, NEOMED College of Medicine, September 2019 Update, Sun Huihui, Xu Yanyong, Yin Liya, Zhang Yanqiao, Zhu Yingdong

Hepatocyte-Specific Expression of Human Carboxylesterase 1 Attenuates Diet-Induced Steatohepatitis and Hyperlipidemia in Mice.

Rodents have at least five carboxylesterase 1 (Ces1) genes, whereas there is only one CES1 gene in humans, raising the question as to whether human CES1 and mouse Ces1 genes share the same functions. In this study, we investigate the role of human…

Macrophage miR-34a Is a Key Regulator of Cholesterol Efflux and Atherosclerosis

Macrophages play a crucial role in the pathogenesis of atherosclerosis, but the molecular mechanisms remain poorly understood. Here we show that microRNA-34a (miR-34a) is a key regulator of macrophage cholesterol efflux and reverse cholesterol…

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…

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…

Hepatocyte nuclear factor 4α prevents the steatosis-to-NASH progression by regulating p53 and bile acid signaling.

Hepatocyte nuclear factor 4α (HNF4α) is highly enriched in the liver, but its role in the progression of liver steatosis (NAFL) to non-alcoholic steatohepatitis (NASH) has not been elucidated. In this study, we investigated the effect of gain or…

Hepatocyte-specific expression of human carboxylesterase 2 attenuates nonalcoholic steatohepatitis in mice.

Human carboxylesterase 2 (CES2) has triacylglycerol hydrolase (TGH) activities and plays an important role in lipolysis. In this study, we aim to determine the role of human CES2 in the progression or reversal of steatohepatitis in diet-induced or…

Hepatocyte ATF3 protects against atherosclerosis by regulating HDL and bile acid metabolism.

Activating transcription factor (ATF)3 is known to have an anti-inflammatory function, yet the role of hepatic ATF3 in lipoprotein metabolism or atherosclerosis remains unknown. Here we show that overexpression of human ATF3 in hepatocytes reduces…

Hepatocyte miR-34a is a key regulator in the development and progression of non-alcoholic fatty liver disease.

Objectives: Hepatic miR-34a expression is elevated in diet-induced or genetically obese mice, and patients with non-alcoholic steatohepatitis (NASH), yet the role of hepatocyte miR-34a in the progression of non-alcoholic fatty liver disease (NAFLD)…

Hepatocyte-specific expression of human carboxylesterase 2 attenuates non-alcoholic steatohepatitis in mice.

Human carboxylesterase 2 (CES2) has triacylglycerol hydrolase (TGH) activities and plays an important role in lipolysis. In this study, we aim to determine the role of human CES2 in the progression or reversal of steatohepatitis in diet-induced or …

Hepatic carboxylesterase 1 is induced by glucose and regulates postprandial glucose levels.

Metabolic syndrome, characterized by obesity, hyperglycemia, dyslipidemia and hypertension, increases the risks for cardiovascular disease, diabetes and stroke. Carboxylesterase 1 (CES1) is an enzyme that hydrolyzes triglycerides and cholesterol…

Global inactivation of carboxylesterase 1 (Ces1/Ces1g) protects against atherosclerosis in Ldlr (-/-) mice.

Atherosclerotic cardiovascular disease is a leading cause of death in the western world. Increased plasma triglyceride and cholesterol levels are major risk factors for this disease. Carboxylesterase 1 (Ces1/Ces1g) has been shown to play a role in…

Tags: 2017, Department of Integrative Medical Sciences, NEOMED College of Medicine, Scientific reports, Xu Jiesi, Xu Yang, Xu Yanyong, Yin Liya, Zhang Yanqiao

Carboxylesterase 1 Is Regulated by Hepatocyte Nuclear Factor 4alpha and Protects Against Alcohol- and MCD diet-induced Liver Injury.

The liver is a major organ that controls hepatic and systemic homeostasis. Dysregulation of liver metabolism may cause liver injury. Previous studies have demonstrated that carboxylesterase 1 (CES1) regulates hepatic triglyceride metabolism and…

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…

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

Oxysterol 7alpha-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 7alpha-hydroxylase (CYP7B1) cDNA…

Transcriptional regulation of human oxysterol 7 alpha-hydroxylase gene (CYP7B1) by Sp1.

Oxysterol 7 alpha-hydroxylase catalyzes hydroxylation of oxysterols and neurosterols and plays a role in the alternative bile acid synthesis pathway. This gene is widely expressed in many organs and peripheral tissues and may protect tissues from the…

Lipophilic Ga Complex with Broad-Spectrum Antimicrobial Activity and the Ability to Overcome Gallium Resistance in both Pseudomonas aeruginosa and Staphylococcus aureus.

Antibiotic resistance (AR) necessitates the discovery of new antimicrobials with alternative mechanisms of action to those employed by conventional antibiotics. One such strategy utilizes Ga(3+) to target iron metabolism, a critical process for …

Tags: 2021, Abeydeera N, Benin BM, Bunge Scott D, Department of Integrative Medical Sciences, Huang SD, Journal of medicinal chemistry, journalArticle, June 2021 List, Kim M-H, Li J, NEOMED College of Medicine, Wang Z, Yu B

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

Transcriptional regulation of the human cholesterol 7 alpha-hydroxylase gene (CYP7A) in HepG2 cells.

A stable HepG2 cell line harboring a human cholesterol 7 alpha-hydroxylase (CYP7A) minigene/luciferase reporter gene construct was selected for studying transcriptional regulation of CYP7A gene promoter. Insulin and phorbol

Structure and nucleotide sequences of the human cholesterol 7 alpha-hydroxylase gene (CYP7).

The human cholesterol 7 alpha-hydroxylase gene (CYP7) spans about 11 kb of the genome and contains six exons and five introns. Nucleotide sequences of a 5'-upstream region to exon III (5535 bp), a 5'-upstream EcoRI fragment (2575 bp), and an EcoRI…

Tags: 1994, Amino Acid Sequence, Base Sequence, Chiang J Y, Cholesterol 7-alpha-Hydroxylase/chemistry/*genetics, Department of Integrative Medical Sciences, DNA, Genomics, Humans, Molecular Sequence Data, NEOMED College of Medicine, Restriction Mapping, Wang D P

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 towards the ducts, countercurrent to the blood flow in the sinusoids. However, because of the small…

Tags: 2021, Chiang J, Department of Integrative Medical Sciences, Distinguished University Professor, Drasdo D, Geisler F, Hengstler JG, Hepatology, Itoh T, Jansen P, journalArticle, July 2021 List, Keitel Verena, NEOMED College of Medicine, Oude Elferink RPJ, Trauner M, van de Graaf SFJ, Vartak N

The orphan nuclear receptor small heterodimer partner is required for thiazolidinedione effects in leptin-deficient mice.

BACKGROUND: Small heterodimer partner (SHP, NR0B2) is involved in diverse metabolic pathways, including hepatic bile acid, lipid and glucose homeostasis, and has been implicated in effects on the peroxisome proliferator-activated receptor gamma…

α-Synuclein Oligomers Induce Glutamate Release from Astrocytes and Excessive Extrasynaptic NMDAR Activity in Neurons, Thus Contributing to Synapse Loss.

Synaptic and neuronal loss are major neuropathological characteristics of Parkinson's disease (PD). Misfolded protein aggregates in the form of Lewy bodies, comprised mainly of α-synuclein (αSyn), are associated with disease progression, and have…

Tags: 2021, Akhtar MW, Bodhinathan K, Department of Integrative Medical Sciences, Eisele YS, February 2021 List, Ghatak S, journalArticle, Kelly JW, Lipton SA, Lynch WP, NEOMED College of Medicine, neuron loss, Piña-Crespo JC, Sanz-Blasco S, synapse loss, Talantova M, The Journal of Neuroscience, Trudler D

Reexamination of amphotropic murine leukemia virus neurovirulence: neural stem cell-mediated microglial infection fails to induce acute neurodegeneration.

The 4070A amphotropic murine leukemia virus (A-MuLV) has been variably reported to harbor neurovirulence determinants within its env gene. In this report we reexamined this issue by applying two approaches previously demonstrated to amplify murine…

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