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Peroxisome proliferator activated receptor

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https://www.readbyqxmd.com/read/27919957/simultaneous-administration-of-statins-and-pioglitazone-limits-tumor-growth-in-a-rat-model-of-malignant-glioma
#1
Jorge Humberto Tapia-Pérez, Robert Preininger, Elmar Kirches, Annegret Reinhold, Jana Butzmann, Sylvia Prilloff, Christian Mawrin, Thomas Schneider
BACKGROUND/AIM: Statins are cholesterol reducers with considerable dose-dependent effect against glioma cells. The apoptotic effect could be increased by combining statins or by adding pioglitazone (PGZ). The last one is an anti-diabetic drug, an agonist of the peroxisome proliferator-activated receptor-gamma (PPARG). We used an animal model to test the effect of such combination in vivo and we investigated the changes on immunological processes. MATERIALS AND METHODS: Thirty-three rats (F344/DuCrl) were anesthetized and glioblastoma (F98) cells were implanted stereotactically...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27918111/imatinib-accelerates-progenitor-cell-mediated-liver-regeneration-in-choline-deficient-ethionine-supplemented-diet-fed-mice
#2
András Rókusz, Edina Bugyik, Vanessza Szabó, Armanda Szücs, Sándor Paku, Péter Nagy, Katalin Dezső
Severe chronic hepatic injury can induce complex reparative processes. Ductular reaction and the appearance of small hepatocytes are standard components of this response, which is thought to have both adverse (e.g. fibrosis, carcinogenesis) and beneficial (regeneration) consequences. This complex tissue reaction is regulated by orchestrated cytokine action. We have investigated the influence of the tyrosine kinase inhibitor imatinib on a regenerative process. Ductular reaction was induced in mice by the widely used choline-deficient ethionine-supplemented diet (CDE)...
December 5, 2016: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/27918085/ppar%C3%AE-promotes-cancer-cell-glut1-transcription-repression
#3
Mengli You, Jianhua Jin, Qian Liu, QingGang Xu, Juanjuan Shi, Yongzhong Hou
Abundant nutrient availability including glucose and amino acids plays an important role in maintaining cancer cell energetic and biosynthetic pathways. As a nuclear receptor, peroxisome-proliferator-activated receptor α (PPARα) regulates inflammation and cancer progression, however, it is still unclear the interaction of PPARα with the cancer cell glucose metabolism. Here we found that PPARα reduced Glut1 (Glucose transporter 1) protein and gene levels in HCT-116, SW480, HeLa, and MCF-7 cancer cell lines...
December 5, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27917940/ubiquitin-ligase-nedd4-regulates-ppar%C3%AE-stability-and-adipocyte-differentiation-in-3t3-l1-cells
#4
Jing Jing Li, Ruishan Wang, Rati Lama, Xinjiang Wang, Z Elizabeth Floyd, Edwards A Park, Francesca-Fang Liao
Peroxisome proliferator-activated receptor-γ (PPARγ) is a ligand-activated nuclear receptor which controls lipid and glucose metabolism. It is also the master regulator of adipogenesis. In adipocytes, ligand-dependent PPARγ activation is associated with proteasomal degradation; therefore, regulation of PPARγ degradation may modulate its transcriptional activity. Here, we show that neural precursor cell expressed developmentally down-regulated protein 4 (NEDD4), an E3 ubiquitin ligase, interacts with the hinge and ligand binding domains of PPARγ and is a bona fide E3 ligase for PPARγ...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917887/13-methylberberine-a-berberine-analogue-with-stronger-anti-adipogenic-effects-on-mouse-3t3-l1-cells
#5
Yit-Lai Chow, Mami Sogame, Fumihiko Sato
Lipid metabolism modulation is a main focus of metabolic syndrome research, an area in which many natural and synthetic chemicals are constantly being screened for in vitro and in vivo activity. Berberine, a benzylisoquinoline plant alkaloid, has been extensively investigated for its anti-obesity effects and as a potential cholesterol and triglyceride-lowering drug. We screened 11 protoberberine and 2 benzophenanthridine alkaloids for their anti-adipogenic effects on 3T3-L1 adipocytes and found that 13-methylberberine exhibited the most potent activity...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917506/comparative-in-vitro-toxicity-assessment-of-perfluorinated-carboxylic-acids
#6
Cecon T Mahapatra, Nur P Damayanti, Samuel C Guffey, Jennifer S Serafin, Joseph Irudayaraj, Maria S Sepúlveda
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are synthetic fluorinated compounds that are highly bioaccumulative and persistent organic pollutants. Perfluorooctanoic acid (PFOA), an eight-carbon chain perfluorinated carboxylic acid, was used heavily for the production of fluoropolymers, but concerns have led to its replacement by shorter carbon chain homologues such as perfluorohexanoic acid (PFHxA) and perfluorobutanoic acid (PFBA). However, limited toxicity data exist for these substitutes. We evaluated the toxicity of PFOA, PFHxA and PFBA on a zebrafish liver cell line and investigated the effects of exposure on cell metabolism...
December 5, 2016: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/27916647/ppars-and-nonalcoholic-fatty-liver-disease
#7
REVIEW
Kim H H Liss, Brian N Finck
Nonalcoholic fatty liver disease (NAFLD) encompasses a range of liver pathology ranging from simple steatosis to varying degrees of inflammation, hepatocyte injury and fibrosis. Without intervention it can progress to end-stage liver disease and hepatocellular carcinoma. Given its close association with obesity, the prevalence of NAFLD has increased dramatically worldwide. Currently, there are no FDA-approved medications for the treatment of NAFLD and although lifestyle modifications with appropriate diet and exercise have been shown to be beneficial, this has been difficult to achieve and sustain for the majority of patients...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916646/roles-of-peroxisome-proliferator-activated-receptor-%C3%AE-%C3%AE-in-skeletal-muscle-physiology
#8
REVIEW
Ravikumar Manickam, Walter Wahli
More than two decades of studying peroxisome proliferator-activated receptors (PPARs) has led to an understanding of their implications in various physiological processes that are key for health and disease. All three PPAR isotypes, PPARα, PPARβ/δ, and PPARγ, are activated by a variety of molecules, including fatty acids, eicosanoids and phospholipids, and regulate a spectrum of genes involved in development, lipid and carbohydrate metabolism, inflammation, and proliferation and differentiation of many cell types in different tissues...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916645/ppar%C3%AE-%C3%AE-in-human-cancer
#9
REVIEW
Rolf Müller
The nuclear receptor factor peroxisome proliferator-activated receptor (PPARβ/δ) can regulate its target genes by transcriptional activation or repression through both ligand-dependent and independent mechanism as well as by interactions with other transcription factors. PPARβ/δ exerts essential regulatory functions in intermediary metabolism that have been elucidated in detail, but clearly also plays a role in inflammation, differentiation, apoptosis and other cancer-associated processes, which is, however, mechanistically only partly understood...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916440/characterisation-of-peroxisome-proliferator-activated-receptor-signalling-in-the-midbrain-periaqueductal-grey-of-rats-genetically-prone-to-heightened-stress-negative-affect-and-hyperalgesia
#10
Bright N Okine, Jessica C Gaspar, Manish K Madasu, Weredeselam M Olango, Brendan Harhen, Michelle Roche, David P Finn
The stress-hyperresponsive Wistar-Kyoto (WKY) rat strain exhibits a hyperalgesic phenotype and is a useful genetic model for studying stress-pain interactions. Peroxisome proliferator-activated receptor (PPAR) signalling in the midbrain periaqueductal grey (PAG) modulates pain. This study characterised PPAR signalling in the PAG of WKY rats exposed to the formalin test of inflammatory pain, versus Sprague-Dawley (SD) controls. Formalin injection reduced levels of the endogenous PPAR ligands N-palmitoylethanolamide (PEA) and N-oleoylethanolamide (OEA) in the lateral(l) PAG of SD rats, but not WKY rats which exhibited higher levels of these analytes compared with formalin-injected SD counterparts...
December 1, 2016: Brain Research
https://www.readbyqxmd.com/read/27915399/naringenin-interferes-with-the-anti-diabetic-actions-of-pioglitazone-via-pharmacodynamic-interactions
#11
Hiroki Yoshida, Rika Tsuhako, Toshiyuki Atsumi, Keiko Narumi, Wataru Watanabe, Chihiro Sugita, Masahiko Kurokawa
Pioglitazone is a peroxisome proliferator-activated receptor gamma (PPARγ) full agonist and useful for the treatment of type 2 diabetes mellitus. Naringenin is a citrus flavonoid with anti-inflammatory actions, which has been shown to prevent obesity-related diseases and to activate PPARγ. The aim of this study was to investigate whether dietary naringenin affects the actions of pioglitazone. We administered naringenin (100 mg/kg) and pioglitazone (10 mg/kg) to Tsumura Suzuki Obese Diabetes (TSOD) mice for 4 weeks and then conducted an oral glucose tolerance test...
December 3, 2016: Journal of Natural Medicines
https://www.readbyqxmd.com/read/27914902/ppar%C3%AE-%C3%AE-a-master-regulator-of-mesenchymal-stem-cell-functions
#12
Farida Djouad, Natacha Ipseiz, Patricia Luz-Crawford, Carina Scholtysek, Gerhard Krönke, Christian Jorgensen
Peroxisome proliferator-activated receptors (PPARs) have emerged as key regulators of physiological and immunological processes. Recently, one of their members PPARβ/δ has been identified as major player in the maintenance of bone homeostasis, by promoting Wnt signalling activity in osteoblast and mesenchymal stem cells (MSC). PPARβ/δ not only controls the fate of MSC but also regulates their immunosuppressive properties by directly modulating their NF-κB activity. In this review, we discuss how the regulation of PPARβ/δ provides an innovative strategy for an optimisation of MSC-based therapy...
November 30, 2016: Biochimie
https://www.readbyqxmd.com/read/27914122/design-synthesis-and-structure-activity-relationships-of-bavachinin-analogues-as-peroxisome-proliferator-activated-receptor-%C3%AE-agonists
#13
Guoxin Du, Yuanyuan Zhao, Li Feng, Zhuo Yang, Jiye Shi, Cheng Huang, Bo Li, Fujiang Guo, Weiliang Zhu, Yiming Li
Bavachinin analogues with systematic modifications at the A-, B-, and C-rings were designed, synthesized, and subjected to in vitro bioevaluation as peroxisome proliferator-activated receptor γ (PPAR-γ) agonists. In total, 30 molecules, including flavanone and flavone analogues, were evaluated by reporter gene assays for the PPAR-γ agonist activity. Preliminary structure-activity relationships of PPAR-γ agonist activity of bavachinin analogues were initially summarized and analogues 2b, 3, 4a, 4b, 11c, 11d, and 12b were found with higher PPAR-γ agonist activities compared to bavachinin...
December 3, 2016: ChemMedChem
https://www.readbyqxmd.com/read/27914036/prolactin-regulatory-element-binding-protein-is-involved-in-suppression-of-the-adiponectin-gene-in-vivo
#14
X Z Zhang, H Imachi, J Y Lyu, K Fukunaga, S Sato, T Ibata, T Kobayashi, T Yoshimoto, F Kikuchi, T Dong, K Murao
PURPOSE: Prolactin regulatory element-binding protein (PREB), a member of the WD-repeat protein family, has been recognized as a transcriptional factor that regulates prolactin promoter activity in the anterior pituitary of rats. PREB is expressed not only in the pituitary but also in various other tissues, including the adipose tissue. Previous studies have shown that PREB acts as a transcriptional regulator and suppresses the expression of the adiponectin gene in cultured 3T3L1 preadipocytes...
December 2, 2016: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/27913621/identification-of-hepatic-lysophosphatidylcholine-acyltransferase-3-as-a-novel-target-gene-regulated-by-peroxisome-proliferator-activated-receptor-%C3%AE
#15
Amar Bahadur Singh, Jingwen Liu
Peroxisome proliferator-activated receptor δ (PPARδ) regulates many genes involved in lipid metabolism. Hepatic lysophosphatidylcholine acyltransferase 3 (LPCAT3) has critical functions in triglycerides transport and ER stress response due to its unique ability to catalyze the incorporation of polyunsaturated fatty acids into phospholipids. Previous studies identified liver X receptor as the transcription factor controlling LPCAT3 expression in mouse liver tissue. Here we show that the hepatic LPCAT3 gene is transcriptionally regulated by PPARδ...
December 2, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27913299/the-inhibitory-effect-of-beta-lapachone-on-rankl-induced-osteoclastogenesis
#16
Dong Ryun Gu, Joon No Lee, Gi-Su Oh, Hyung Jin Kim, Min Seuk Kim, Seoung Hoon Lee
β-lapachone (β-L) is a substrate of reduced nicotinamide adenine dinucleotide (NADH): quinone oxidoreductase 1 (NQO1). NQO1 reduces quinones to hydroquinones using NADH as an electron donor and consequently increases the intracellular NAD+/NADH ratio. The activation of NQO1 by β-L has beneficial effects on several metabolic syndromes, such as obesity, hypertension, and renal injury. However, the effect of β-L on bone metabolism remains unclear. Here, we show that β-L might be a potent inhibitor of receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis...
November 30, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27911411/preparation-and-in-vivo-use-of-an-activity-based-probe-for-n-acylethanolamine-acid-amidase
#17
Elisa Romeo, Silvia Pontis, Stefano Ponzano, Fabiola Bonezzi, Marco Migliore, Simona Di Martino, Maria Summa, Daniele Piomelli
Activity-based protein profiling (ABPP) is a method for the identification of an enzyme of interest in a complex proteome through the use of a chemical probe that targets the enzyme's active sites. A reporter tag introduced into the probe allows for the detection of the labeled enzyme by in-gel fluorescence scanning, protein blot, fluorescence microscopy, or liquid chromatography-mass spectrometry. Here, we describe the preparation and use of the compound ARN14686, a click chemistry activity-based probe (CC-ABP) that selectively recognizes the enzyme N-acylethanolamine acid amidase (NAAA)...
November 23, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27911087/%C3%AE-amyrin-attenuates-high-fructose-diet-induced-metabolic-syndrome-in-rats
#18
Pankaj Prabhakar, K H Reeta, Subir Kumar Maulik, Amit Kumar Dinda, Yogendra Kumar Gupta
This study investigated the effect of α-amyrin (a pentacyclic triterpene) on high-fructose diet (HFD)-induced metabolic syndrome in rats. Male Wistar rats were randomly distributed into different groups. The control group was fed normal rat chow diet. The HFD group was fed HFD (60%; w/w) for 42 days. Pioglitazone (10 mg/kg, orally, once daily) was used as a standard drug. α-Amyrin was administered in 3 doses (50, 100, and 200 mg/kg, orally, once daily along with HFD). Plasma glucose, total cholesterol, triglycerides, and high-density lipoprotein cholesterol (HDL-C) were estimated...
September 2, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27910957/mir-27a-attenuates-adipogenesis-and-promotes-osteogenesis-in-steroid-induced-rat-bmscs-by-targeting-ppar%C3%AE-and-grem1
#19
Chenxi Gu, Yan Xu, Shanfeng Zhang, Hongya Guan, Shi Song, Xiuli Wang, Yisheng Wang, Yuebai Li, Guoqiang Zhao
The imbalance between adipogenic and osteogenic differentiation in bone marrow mesenchymal stem cells (BMSCs) plays a significant role in the pathogenesis of steroid-induced osteonecrosis of the femoral head (ONFH). Several microRNAs (miRNAs) are involved in regulating adipogenesis and osteogenesis. In this study, we established a steroid-induced ONFH rat model to identify the potential relevant miRNAs. We identified 9 up-regulated and 28 down-regulated miRNAs in the ONFH rat model. Of these, miR-27a was down-regulated and negatively correlated with peroxisome proliferator-activated receptor gamma (PPARγ) and gremlin 1 (GREM1) expression...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910955/pgc-1%C3%AE-dictates-endothelial-function-through-regulation-of-enos-expression
#20
Siobhan M Craige, Swenja Kröller-Schön, Chunying Li, Shashi Kant, Shenghe Cai, Kai Chen, Mayur M Contractor, Yongmei Pei, Eberhard Schulz, John F Keaney
Endothelial dysfunction is a characteristic of many vascular related diseases such as hypertension. Peroxisome proliferator activated receptor gamma, coactivator 1α (PGC-1α) is a unique stress sensor that largely acts to promote adaptive responses. Therefore, we sought to define the role of endothelial PGC-1α in vascular function using mice with endothelial specific loss of function (PGC-1α EC KO) and endothelial specific gain of function (PGC-1α EC TG). Here we report that endothelial PGC-1α is suppressed in angiotensin-II (ATII)-induced hypertension...
December 2, 2016: Scientific Reports
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